21 July 2017

    Results for the six months ended 30 June 2017 (Unaudited)

    Based on IFRS and expressed in US Dollars (US$)

    Acacia Mining plc ("Acacia'') reports 2017 interim results

    "The first half has posed significant challenges to our operations in Tanzania
    following the introduction of the concentrate export ban in March and I am
    pleased with how we have performed in light of this", said Brad Gordon, Chief
    Executive Officer of Acacia Mining. "It is a complex and fluid situation which
    has led to a significant reduction in our cash balance to US$176 million from
    US$318 million, as a result of being unable to realise US$175 million of
    revenue during the half together with a US$51 million VAT outflow. We continue
    to take steps to preserve long-term shareholder value and have served
    Arbitration notices for our Bulyanhulu and Buzwagi mines and will work to
    achieve a negotiated resolution, which is the preferable outcome for all
    parties. In spite of the challenges we faced, we delivered the highest H1
    production in the history of the Company, with gold production of 428,203
    ounces. AISC for the first six months was US$893 per ounce sold, 5% lower than
    H1 2016, and if we had been able to sell all of the concentrate produced, AISC
    would have been approximately US$800 per ounce. As a result of the impact of
    the ban we are now targeting the lower end of the production guidance range of
    850-900,000 ounces for 2017, but due to strong cost discipline we are leaving
    AISC guidance unchanged."

    Operational Highlights

      * H1 Total Recordable Injury Frequency Rate (TRIFR) of 0.40, 49% lower than
        H1 2016
      * H1 gold production of 428,203 ounces, 4% higher than H1 2016, with gold
        sales of 312,438 ounces
      * H1 AISC1 of US$893 per ounce sold, 5% below H1 2016 and H1 cash costs1 of
        US$577/oz sold,10% lower than H1 2016
          + H1 AISC, assuming sales matched production, would have been US$800/oz,
            which includes a US$18/oz share based payment revaluation credit
            resulting from the fall in the share price year to date
      * Q2 gold production of 208,533 ounces, 6% lower than Q2 2016
      * Q2 gold sales of 127,694 ounces, which includes a reversal of advanced
        sales of 18,204 ounces of concentrate from Q1 2017
      * Q2 AISC1 of US$835/oz sold, 10% below Q2 2016 and Q2 cash costs1 of US$577/
        oz sold, 3% lower than Q2 2016

    Financial Highlights

      * Financial performance was significantly impacted by the ongoing ban on
        exporting concentrate which resulted in approximately US$175m of lost
        revenue in the period
      * H1 Revenue of US$391.7 million, 22% lower than H1 2016
      * H1 EBITDA1 of US$161.4 million, 13% down from H1 2016
      * H1 Net earnings of US$62.5 million, equating to US15.3 cents per share
      * Cash on hand of US$175.9 million as at 30 June 2017, with net cash of
        US$90.7 million
      * As a result of the negative cash flow, no interim dividend has been
        declared, in-line with the cash flow based dividend policy

                                           Three months ended 30 June   Six months ended 30 
                                                                               June         
                                                                                            
    (Unaudited)                                      2017         2016       2017       2016
                                                                                            
    Gold production (ounces)                      208,533      221,815    428,203    412,025
                                                                                            
    Gold sold (ounces)                            127,694      216,782    312,438    400,963
                                                                                            
    Cash cost (US$/ounce)1                            577          595        577        640
                                                                                            
    AISC (US$/ounce)1                                 835          926        893        941
                                                                                            
    Net average realised gold price (US$/           1,255        1,258      1,235      1,209
    ounce)1                                                                                 
                                                                                            
    (in US$'000)                                                                            
                                                                                            
    Revenue                                       157,763      284,038    391,664    504,947
                                                                                            
    EBITDA 1                                       79,222      119,332    161,415    184,882
                                                                                            
    Adjusted EBITDA1                               83,199      114,088    166,219    180,499
                                                                                            
    Net earnings/(loss)                            35,716       46,282     62,543    (6,128)
                                                                                            
    Basic earnings/(loss) per share (EPS)             8.7         11.3       15.3      (1.5)
    (cents)                                                                                 
                                                                                            
    Adjusted net earnings1                         38,500       40,659     65,906     58,767
                                                                                            
    Adjusted net earnings per share (AEPS)            9.4          9.9       16.1       14.3
    (cents)1                                                                                
                                                                                            
    Cash generated from operating                (23,909)      104,864      1,315    157,096
    activities                                                                              
                                                                                            
    Capital expenditure2                           45,628       49,142     92,456     85,172
                                                                                            
    Cash balance                                  175,886      284,357    175,886    284,357
                                                                                            
    Total borrowings                               85,200      113,600     85,200    113,600

        1 These are non-IFRS measures. Refer to page 28 for definitions   2
    Excludes non-cash capital adjustments (reclamation asset adjustments) and
    include finance lease purchases and land purchases recognised as long term
    prepayments

    Other Developments

    Export of metallic mineral concentrates

    As previously announced, on 3 March 2017, the Ministry of Energy and Minerals
    of the Tanzanian Government announced a general ban on the export of metallic
    mineral concentrates following a directive made by the President of the United
    Republic of Tanzania in order to promote the creation of a domestic smelting
    industry. Following the directive we ceased all exports of our gold/copper
    concentrate ("concentrate") including the 277 containers that had been approved
    for export prior to the ban which are located in Dar es Salaam at both the port
    and a staging warehouse.

    The prevention of exports impacts Bulyanhulu and Buzwagi which produce gold in
    both doré and in concentrate form due to the mineralogy of the ore. North Mara
    is unaffected due to 100% of its production being doré. In the first half of
    2017, concentrate accounted for 36% of group level production, with 64% of
    Buzwagi production and 46% of Bulyanhulu production respectively being
    concentrate.

    Acacia has been exporting concentrate from Bulyanhulu since 2001 and from
    Buzwagi since 2010 and has fully declared all associated gold, copper and
    silver revenue. Whilst the proportion of gold in the concentrate is less than
    0.02% it represents approximately 90% of the value of the concentrate, with
    copper representing approximately 10% of the value and silver less than 1%.
    Bulyanhulu and Buzwagi are permitted under their agreements signed with the
    Government of Tanzania to sell their concentrate products to overseas customers
    and to export the concentrate in containers, and have been in full compliance
    with these laws and their export permits.

    During the second quarter two Presidential Committees announced their findings
    following investigations into the technical and economic aspects of the
    historic exports of gold/copper concentrates. Acacia fully refutes the
    implausible findings of both committees, which claim that Acacia and its
    predecessor companies have historically significantly under-declared the
    contents of exports of concentrate which has led to an under-declaration of
    taxes of tens of billions of dollars. Following the Committees' announcements,
    the Government commenced various investigations into the allegations of
    undeclared revenue and unpaid taxes. Acacia is fully co-operating with these
    investigations and has provided extensive documentation and information to the
    investigating authorities. In addition, employees in Tanzania have been and
    continue to be interviewed by Government agencies as part of this process.
    Acacia re-iterates that it has declared everything of commercial value that it
    has produced since it started operating in Tanzania and has paid all
    appropriate royalties and taxes on all of the payable minerals that it has
    produced. In addition, Acacia's consolidated accounts and each local company's
    accounts are annually audited to an international standard in accordance with
    IFRS. Acacia has requested copies of the two Presidential Committees' reports
    and called for independent verification of the reported results, but to date
    has not received a response.

    As reported at the end of Q1 2017, included in the concentrate shipments
    retained in Dar es Salaam were approximately 18,200 ounces of gold for which we
    received advance payment. As mentioned, there was the possibility that the
    advanced payment would have to be refunded as these shipments did not leave
    Tanzania within the contractual period. During Q2 2017, we repaid approximately
    US$22 million, being the full advance payment received, and have subsequently
    reversed the sale. Should the ban be lifted, these ounces can be sold again
    immediately as all royalties have been paid and export permits were previously
    granted.

    We have continued to operate at Bulyanhulu and Buzwagi during the first half
    and continue to stockpile concentrate at each of the sites. This has resulted
    in the build-up of approximately 127,000 ounces of gold contained in unsold
    concentrate. In addition, we have approximately 8.3 million pounds of copper
    and 107,000 ounces of silver contained in the unsold concentrate. If the
    concentrate had been sold, net revenue and cashflow would have increased by
    approximately US$163 million. AISC was impacted on a unit cost basis by the
    concentrate ban, and had we sold all of the ounces produced, AISC for the half
    year would have been approximately US$800 per ounce, and before the impact of
    the share based payment revaluation credit would have been approximately US$818
    per ounce.

    In June, the Government of Tanzania and Barrick Gold Corporation ("Barrick")
    agreed to commence discussions with the aim of resolving the current situation.
    Whilst these discussions are yet to commence, we understand that they will do
    so in the near future and that both sides will seek to achieve a timely
    resolution to the dispute. At this stage, Acacia is not participating directly
    in the discussions. Any potential resolution that might be identified as a
    result of the discussions will be subject to approval by Acacia, and the
    Company is working with Barrick to support such discussions.

    Acacia's preferred outcome remains for a negotiated settlement with the
    Government, and whilst we see a route to achieving this we believe that it
    makes sense to continue operations at all three of our mines despite the losses
    we are incurring, predominantly at Bulyanhulu. However, given the scale of the
    cash outflows at Bulyanhulu we do not believe that this situation is
    sustainable at that operation beyond the end of the current quarter. In the
    event a decision was made to move Bulyanhulu to temporary care and maintenance,
    Acacia estimates that it would incur approximately US$30 million of upfront
    costs to retrench employees and end contracts in addition to the natural
    unwinding of around two months' worth of accounts payable with minimal gold
    production over the same period. Going forward, monthly costs of US$2-3 million
    would be incurred to maintain the mine in good standing ahead of a future
    re-start, when the mine would then benefit from the initial build-up of
    accounts payable.

    Update on legislative changes in Tanzania

    On 29th June, three new Parliamentary bills, which recommended significant
    changes to the legal and regulatory framework governing the natural resources
    sector as a whole in Tanzania, were published under a certificate of urgency
    which led to the extension of the Parliamentary session. Post period end, these
    bills were enacted by the Tanzanian Parliament and published in the Country's
    official Government Gazette of new legislation. All of the legislation is now
    in force and some of the terms within the acts are being applied by Tanzanian
    authorities.

    The Natural Wealth and Resources (Permanent Sovereignty) Act, No 5 of 2017, the
    Natural Wealth and Resources Contracts (Review and Re-Negotiation of
    Unconscionable Terms) Act, No 6 of 2017 and the Written Laws (Miscellaneous
    Amendments) Act, No 7 of 2017, purport to make a number of changes to the
    operating environment for Tanzania's extractive industries. These changes
    include, among others:

      * the right for the Government of Tanzania (GoT) to renegotiate existing
        mineral development agreements at its discretion;
      * the provision to the GoT of a non-dilutable, free-carried interest of no
        less than 16% in all mining projects;
      * the right for the GoT to acquire up to 50% of any mining asset commensurate
        with the value of tax benefits provided to the owner of that asset by the
        GoT;
      * removal of the refund of input VAT incurred on production of raw minerals
        for export;
      * an increase in the rate of royalties from 4% to 6% on revenues from gold,
        copper, silver and platinum group metals;
      * requirements for local beneficiation and procurement;
      * constraints on the use of off-shore bank accounts; and
      * a GoT lien over materials extracted from mining operations.

    For a more detailed reading of the legislative provisions included in the new
    laws, please see http://www.parliament.go.tz/bills-list.

    This legislation is in addition to the recent amendments introduced to the
    Finance Act, which require mining companies to pay a 1% clearance fee
    calculated by reference to the gross value of minerals to the Government in
    order to obtain clearance for export ("Clearing Fee"). It is Acacia's belief
    that a number of the changes contained within the laws will require
    supplementary regulations over the coming months to set out the proposed
    practical implementation of the new laws. At this stage, Acacia is not aware of
    this process having commenced.

    Acacia continues to monitor the impact of the new legislation in light of its
    Mineral Development Agreements ("MDAs") with the Government of Tanzania.
    However, to minimise further disruptions to our operations we will, in the
    interim, satisfy the requirements imposed as regards the increased royalty rate
    applicable to metallic minerals such as gold, copper and silver of 6%
    (increased from 4%), in addition to the recently imposed 1% clearing fee on
    exports. These payments are being made under protest, without prejudice to our
    legal rights under the MDAs.

    Filing of Notice of Arbitration

    Subsequent to period end Acacia announced that it served Notices of Arbitration
    in Tanzania on behalf of Bulyanhulu Gold Mine Limited ("BGML"), the owner of
    the Bulyanhulu mine, and Pangea Minerals Limited ("PML"), the owner of the
    Buzwagi mine. These Notices refer the current disputes between the Government
    of Tanzania and each of BGML and PML to arbitration. This is in accordance with
    the dispute resolution processes agreed by the Government of Tanzania in its
    MDAs with BGML and PML.

    The serving of the Notices was necessary to protect the Company, and is
    currently with the Government to respond, but Acacia remains of the view that a
    negotiated resolution is the preferred outcome to the current disputes and the
    Company will continue to work to achieve this.

    Minimum local shareholding and listing requirements for mining companies

    During the latest Tanzanian Parliamentary session, the legislation impacting
    the ability for foreign investors to buy shares in initial public offers was
    amended, which significantly broadens the potential investor base for future
    offerings. At this stage, other than Acacia's existing cross listing on the Dar
    es Salaam Stock Exchange ("DSE"), no companies in either the Mining or
    Telecommunications sectors have successfully completed a listing on the DSE.
    Acacia supports the attempt to build capital markets in Tanzania and the
    promotion of local ownership and we have engaged with the Capital Markets and
    Security Authority (CMSA), the DSE, the Ministry of Energy and Minerals and all
    other relevant authorities in Tanzania with a view to finding a route forward
    that is both beneficial and practical for all stakeholders.

    Contribution to Tanzania

    In the first half of 2017, Acacia has paid a total of US$53 million of taxes
    and royalties. This is made up of provisional corporate tax payments year of
    US$17.3 million, royalties of US$18.6 million, payroll taxes of US$11.5 million
    and other taxes of US$5.6 million. In addition, we have also paid US$10 million
    in tax deposits which is recognised as part of other assets. If the gold/copper
    concentrate produced since March was sold during the first half then
    approximately a further US$7 million would have been paid in royalties. We have
    also paid local service levies due on H2 2016 revenues of US$1.6 million during
    the first half and are due to pay a further US$1.2 million in July for H1 2017.
    These amounts are 300% higher than the requirements set out in our MDAs. The
    provisional corporate tax payments have been offset against the indirect tax
    receivable under the existing Memorandum of Settlement ("MOS") entered into
    with the Tanzanian Government.

    Over the last 6 months, Acacia's Sustainable Communities (SC) team continued to
    focus on delivering community benefits despite the uncertainties in the
    operating environment. The focus for the first half of the year was to begin
    and/or complete key infrastructural projects which we had committed to the
    communities and also to begin the roll out of the new SC strategy by building
    some of the foundations for implementation.

    By end of June 2017, through the Maendeleo Fund, we implemented 6 social
    infrastructure projects with a total value of approximately US$1 million at the
    3 mines sites - some of which began at the end of 2016. The key projects per
    site include:

      * Bulyanhulu: Constructed additional classrooms at Lwabakanga Primary School
        which has almost 600 students
      * Buzwagi: Completed the construction of the 2.5km Mwime Chapulwa gravel road
        to benefit the Mwendakulima, Mwime and Chapulwa villages with a population
        of over 13,500 people.
      * North Mara: Completion of the Kerende and Nyamwaga Health Centres which
        will benefit a population of about 25,000 people in 6 villages.

    An additional 10 infrastructural development projects are currently underway
    across all our sites with a value of US$940,000 which include school
    infrastructure, water supply, sanitation and maintenance of community roads. 
    Other development projects in the last 6 months include continuing our support
    to 2,700 students with uniforms and books under the CanEducate partnership;
    supporting sports through coaching clinics in partnership with Sunderland
    Football Club and provision of reconstructive surgery for 36 burns and cleft
    lip and palate patients through our partnership with Rafiki Medical Missions.

    In addition, Acacia, in partnership with TANESCO, has invested US$2.5 million
    to construct a STATCOM centre at Bulyanhulu that will enhance the quality of
    power supply in the area. The investment will greatly improve the stability of
    the electricity at the Bulyanhulu and Buzwagi mines and will reduce our
    reliance on self-generated diesel power. Residents in the Shinyanga and Geita
    districts around the mines will also benefit from improved quality power supply
    resulting from the commissioning of the STATCOM in July 2017.

    During the reporting period, we shared our SC strategy with some of our key
    partners including government officials, development partners and other
    interested parties to increase awareness of the strategy. A database is under
    design to allow us to effectively monitor and evaluate our development efforts
    and it is expected to be completed in Q3 2017. Our future development projects
    will be informed by research and a consulting firm has been contracted to do an
    assessment of opportunities for development in the agricultural and small
    business sectors around our mine sites. Results from this study are expected in
    Q4 2017 and will be used to plan 2018 development initiatives. This study is in
    addition to the education scoping study which was completed in January 2017.

    Indirect Taxation update

    During the second quarter, Acacia incurred a further US$23 million of VAT
    outflows and received no VAT refunds, which together with the outflow in Q1
    2017 has led to a total VAT outflow in the first half of 2017 of US$51 million.
    The audit of all VAT claims dating back to 2014 undertaken by the Tanzanian
    Revenue Authority and the Ministry of Finance is ongoing, with the focus now
    shifted to the suppliers to which our VAT claims relate, to determine whether
    the corresponding output VAT on their side has been declared. We believe that
    all VAT registered businesses are subject to this audit. As a result, our total
    indirect tax receivables has increased to approximately US$165 million during
    the quarter, of which approximately US$21 million of this is covered by the
    MOS, following the total offset of North Mara corporate tax mentioned above.
    Approximately US$7 million of the receivable is identified as a long term
    receivable, with the balance short term.

    As disclosed above, the new legislation included an Amendment to the VAT Act
    2015 so that no input tax credit can be claimed for the exportation of raw
    minerals, with effect from 20 July 2017. Whilst we are seeking further clarity
    on the application of the Amendment to the VAT Act 2015, we expect that we will
    continue to incur outflows related to VAT, notwithstanding exemptions that
    apply under the MDAs.

    Board Changes

    As previously reported, Peter Tomsett stepped down from the Acacia Board of
    Directors following the 2017 Annual General Meeting. Post period end,
    Ambassador (retd) Juma Mwapachu retired from the Board after six years of
    service as his term of appointment expired. Following these changes, the Acacia
    Board comprise 7 members, including 4 Independent Non-Executive Directors, two
    Non-Executive Directors and one Executive Director. Acacia continues to assess
    the ongoing composition of the Board and will announce a replacement Senior
    Independent Director in due course.

    Acacia would like to thank Peter and the Ambassador for their valuable
    commitment and support to the Company during their tenure on the Board and wish
    them all the best for the future.

    Dividend

    Acacia has a cash flow based dividend policy where we aim to pay a dividend of
    between 15-30% of our operational cash flow after sustaining capital and
    capitalised development but before expansion capital and financing costs. As a
    result of the inability to export concentrates Acacia has experienced negative
    free cash flow in the first half of 2017 and due to the level of uncertainty
    over full year cash flow expectations, the Board of Directors has not
    recommended the payment of an interim dividend.

    International Employee Work Permits

    During the second quarter Acacia, and a number of its key contractors,
    experienced difficulty when applying for work and residence permits (as both
    are required to work in country) for international workers. This has had a
    particular impact on our underground development contractor at both Bulyanhulu
    and North Mara and led to a reduction in development metres as a result of the
    reduction in available staff. Together with the contractor, Acacia is working
    to resolve this issue with the Tanzanian Ministry of Labour, but expects full
    year development metres at both Bulyanhulu and North Mara to be behind plan.

    Outlook

    Our three mines continue to produce and sell gold doré whilst stockpiling gold/
    copper concentrate. As mentioned above, as at 30 June 2017 we have
    approximately 127,000 ounces of gold, 8.3 million pounds of copper and 107,000
    ounces of silver contained within unsold concentrate. We reiterate our group
    production guidance range of between 850,000-900,000 ounces, although are now
    targeting the lower end of this range. This is a result of full year
    expectations at Bulyanhulu being approximately 10% lower than previously
    planned due to lower underground productivities. Despite this, we continue to
    expect full year group all-in sustaining costs of between US$880 - US$920 per
    ounce and cash cost per ounce of between US$580 - US$620 per ounce. Our cost
    guidance is inclusive of the payment of the higher royalties and clearing fee,
    which are currently being paid under protest. In light of ongoing developments
    in Tanzania we continue to assess our capital expenditure and now expect this
    to be between US$180-200 million for the year as we defer non-essential spend.
    We continue to review broader spending across the business to ensure that we
    manage cash outflows whilst we are unable to export 100% of our production.

    Key Statistics                                   Three months ended  Six months ended 
                                                           30 June            30 June     
                                                                                          
    (Unaudited)                                          2017       2016      2017    2016
                                                                                          
    Tonnes mined (thousands of tonnes)                  8,558      9,939    18,039  19,346
                                                                                          
    Ore tonnes mined (thousands of tonnes)              3,996      2,244     7,212   4,689
                                                                                          
    Ore tonnes processed (thousands of tonnes)          2,440      2,412     4,860   4,900
                                                                                          
    Process recovery rate exc. tailings reclaim         93.0%      89.6%     93.2%   92.6%
    (percent)                                                                             
                                                                                          
    Head grade exc. tailings reclaim (grams per           3.3        3.7       3.4     3.2
    tonne)                                                                                
                                                                                          
    Process recovery rate inc. tailings reclaim         89.3%      88.9%     89.6%   87.7%
    (percent)                                                                             
                                                                                          
    Head grade inc. tailings reclaim (grams per           3.0        3.2       3.1     3.0
    tonne)                                                                                
                                                                                          
    Gold production (ounces)                          208,533    221,815   428,203 412,025
                                                                                          
    Gold sold (ounces)                                127,694    216,782   312,438 400,963
                                                                                          
    Copper production (thousands of pounds)             4,409      4,624     9,065   8,427
                                                                                          
    Copper sold (thousands of pounds) 3               (1,183)      4,403     1,304   8,084
                                                                                          
    Cash cost per tonne milled exc. tailings reclaim       34         62        43      60
    (US$/t)1                                                                              
                                                                                          
    Cash cost per tonne milled inc. tailings reclaim       30         54        37      52
    (US$/t)1                                                                              
                                                                                          
    Per ounce data                                                                        
                                                                                          
         Average spot gold price2                       1,257      1,260     1,238   1,221
                                                                                          
         Net average realised gold price1               1,255      1,258     1,235   1,209
                                                                                          
         Total cash cost1                                 577        595       577     640
                                                                                          
         All-in sustaining cost1                          835        926       893     941
                                                                                          
    Average realised copper price (US$/lb)               2.56       2.16      2.99    2.13

    Financial results

                                         Three months ended 30 June     Six months ended 30 
                                                                               June         
                                                                                            
    (Unaudited, in US$'000 unless                2017           2016         2017       2016
    otherwise stated)                                                                       
                                                                                            
    Revenue                                   157,763        284,038      391,664    504,947
                                                                                            
    Cost of sales                            (94,571)      (183,539)    (243,967)  (355,439)
                                                                                            
    Gross profit                               63,192        100,499      147,697    149,508
                                                                                            
    Corporate administration                  (5,878)        (4,469)     (12,520)    (9,771)
                                                                                            
    Share based payments                       18,209       (15,697)        7,785   (19,635)
                                                                                            
    Exploration and evaluation costs          (9,372)        (5,199)     (16,150)   (11,150)
                                                                                            
    Corporate social responsibility           (1,544)        (1,744)      (3,739)    (4,614)
    expenses                                                                                
                                                                                            
    Other (charges)/ income                   (8,802)          2,776     (19,617)      2,168
                                                                                            
    Profit before net finance expense          55,805         76,166      103,456    106,506
    and taxation                                                                            
                                                                                            
    Finance income                                946            197        1,543        490
                                                                                            
    Finance expense                           (3,216)        (2,514)      (5,454)    (5,380)
                                                                                            
    Profit before taxation                     53,535         73,849       99,545    101,616
                                                                                            
    Tax expense                              (17,819)       (27,567)     (37,002)  (107,744)
                                                                                            
    Net profit/(loss) for the period           35,716         46,282       62,543    (6,128)

    1 These are non-IFRS financial performance measures with no standard meaning
    under IFRS. Refer to "Non IFRS measures" on page 28 for definitions.

    2 Reflect the London PM fix price.

    3 Negative sales quantities relate to the reversal of sales recorded during Q1
    2017.

    For further information, please visit our website: http://www.acaciamining.com/
    or contact:

    Acacia Mining plc                             +44 (0) 207 129 7150                         

    Brad Gordon, Chief Executive Officer

    Andrew Wray, Chief Financial Officer

    Giles Blackham, Investor Relations Manager

    Camarco                                       +44 (0) 20 3757 4980                         

    Gordon Poole / Billy Clegg / Nick Hennis

    About Acacia Mining plc

    Acacia Mining plc (LSE:ACA) is Tanzania's largest gold miner and one of the
    largest producers of gold in Africa. We have three producing mines, all located
    in north-west Tanzania: Bulyanhulu, Buzwagi, and North Mara and a portfolio of
    exploration projects in Tanzania, Kenya, Burkina Faso and Mali.

    Our approach is focused on strengthening our core pillars; our business, our
    people and our relationships, whilst continuing to invest in our future. Our
    ambition is to create a leading African Company.

    Acacia is a UK public company headquartered in London. We are listed on the
    Main Market of the London Stock Exchange with a secondary listing on the Dar es
    Salaam Stock Exchange. Barrick Gold Corporation is our majority shareholder.
    Acacia reports in US dollars and in accordance with IFRS as adopted by the
    European Union, unless otherwise stated in this report.

    Conference call

    A presentation will be held for analysts and investors on 21 July 2017 at Noon
    London time.

    For those unable to attend, an audio webcast of the presentation will be
    available on our website http://www.acaciamining.com/. For those who wish to
    ask questions, the access details for the conference call are as follows:

    Participant dial in           +44 20 3059 8125 / +1 724 928 9460

    Password:                      Acacia

    FORWARD- LOOKING STATEMENTS

    This report includes "forward-looking statements" that express or imply
    expectations of future events or results. Forward-looking statements are
    statements that are not historical facts. These statements include, without
    limitation, financial projections and estimates and their underlying
    assumptions, statements regarding plans, objectives and expectations with
    respect to future production, operations, costs, projects, and statements
    regarding future performance. Forward-looking statements are generally
    identified by the words "plans," "expects," "anticipates," "believes,"
    "intends," "estimates" and other similar expressions.

    All forward-looking statements involve a number of risks, uncertainties and
    other factors, many of which are beyond the control of Acacia, which could
    cause actual results and developments to differ materially from those expressed
    in, or implied by, the forward-looking statements contained in this report.
    Factors that could cause or contribute to differences between the actual
    results, performance and achievements of Acacia include, but are not limited
    to, changes or developments in political, economic or business conditions or
    national or local legislation or regulation in countries in which Acacia
    conducts - or may in the future conduct - business, industry trends,
    competition, fluctuations in the spot and forward price of gold or certain
    other commodity prices (such as copper and diesel), currency fluctuations
    (including the US dollar, South African rand, Kenyan shilling and Tanzanian
    shilling exchange rates), Acacia's ability to successfully integrate
    acquisitions, Acacia's ability to recover its reserves or develop new reserves,
    including its ability to convert its resources into reserves and its mineral
    potential into resources or reserves, and to process its mineral reserves
    successfully and in a timely manner, Acacia's ability to complete land
    acquisitions required to support its mining activities, operational or
    technical difficulties which may occur in the context of mining activities,
    delays and technical challenges associated with the completion of projects,
    risk of trespass, theft and vandalism, changes in Acacia's business strategy
    including, the ongoing implementation of operational reviews, as well as risks
    and hazards associated with the business of mineral exploration, development,
    mining and production and risks and factors affecting the gold mining industry
    in general. Although Acacia's management believes that the expectations
    reflected in such forward-looking statements are reasonable, Acacia cannot give
    assurances that such statements will prove to be correct. Accordingly,
    investors should not place reliance on forward-looking statements contained in
    this report.

    Any forward-looking statements in this report only reflect information
    available at the time of preparation. Save as required under the Market Abuse
    Regulation or otherwise under applicable law, Acacia explicitly disclaims any
    obligation or undertaking publicly to update or revise any forward-looking
    statements in this report, whether as a result of new information, future
    events or otherwise. Nothing in this report should be construed as a profit
    forecast or estimate and no statement made should be interpreted to mean that
    Acacia's profits or earnings per share for any future period will necessarily
    match or exceed the historical published profits or earnings per share of
    Acacia.

                                       LSE: ACA                                    

    TABLE OF CONTENTS

    Interim Operating Review                                                        9      
                                                                                           
    Exploration Review                                                              15     
                                                                                           
    Financial Review                                                                21     
                                                                                           
    Significant judgements in applying accounting policies and key sources of       27     
    estimation uncertainty                                                                 
                                                                                           
    Non-IFRS measures                                                               28     
                                                                                           
    Risk Review                                                                     32     
                                                                                           
    Condensed Financial Information:                                                       
                                                                                           
    - Consolidated Income Statement and Consolidated Statement of Comprehensive     36/37  
    Income                                                                                 
                                                                                           
    - Consolidated Balance Sheet                                                    38     
                                                                                           
    - Consolidated Statement of Changes in Equity                                   39     
                                                                                           
    - Consolidated Statement of Cash Flows                                          40     
                                                                                           
    - Notes to the Condensed Financial Information                                  41     
                                                                                           

    Operating Review

    Half Year Review

    Despite the uncertainty caused by the operating environment in Tanzania, Acacia
    has continued to record impressive safety results, with a H1 Total Recordable
    Injury Frequency Rate (TRIFR) of 0.40, which is 49% lower than the
    corresponding period in 2016.  This performance is coupled with a decrease in
    the Injury Severity Rate and the number of High Potential Incidents recorded as
    compared to the corresponding period in 2016.  The site management team
    continues to engage and communicate regularly with the workforce on the
    situation in Tanzania and to conduct audits and inspections of all workplaces. 
    All operations maintain excellent house-keeping and empower and encourage the
    workforce to stop work if the need requires.

    Acacia delivered first half production of 428,203, an increase of 4% year on
    year, while AISC of US$893 per ounce sold and cash cost of US$577 per ounce
    sold were 5% and 10% respectively lower than H1 2016. As a result of the ban on
    the export of gold/copper concentrate, sales ounces trailed production by
    approximately 115,000 ounces. For reference purposes, if H1 sales ounces
    equalled H1 production, AISC would have been approximately US$800 per ounce and
    cash costs would have been approximately US$569 per ounce.

    North Mara achieved production of 179,578 ounces for the first half, up 3% from
    H1 2016. This was a result of 2% higher head grade driven by the preferential
    processing of higher grade stockpile ore from the Nyabirama pit; as well as
    continued high grades from the Gokona underground mine albeit slightly lower on
    average than H1 2016, combined with a 1% improvement in recoveries. Gold ounces
    sold of 178,130 ounces were 5% higher than the comparative period and broadly
    in line with production. Ore tonnes from underground mining were 50% higher in
    the first half, due to Gokona underground development being at a more advanced
    stage with access to more stopes compared to H1 2016. AISC of US$736 per ounce
    sold was 2% higher than H1 2016 (US$720) primarily due to slightly higher cash
    costs, higher capitalised development costs and higher sustaining capital
    expenditure offset by the impact of increased sales volumes.

    At Buzwagi, gold production of 126,084 ounces was 57% higher than H1 2016, and
    in line with expectations. This was mainly due to a 50% increase in head grade
    driven by higher grade ore mined from the main ore zone at the bottom of the
    open pit in H1 2017. AISC per ounce sold of US$770 was 31% lower than in H1
    2016, mainly driven by the increased production base, lower cash cost and lower
    sustaining capital expenditure, partly offset by the impact of lower sales
    volumes on individual cost items.

    Bulyanhulu produced 122,542 gold ounces, 22% lower than the same period in
    2016. This was due to a 25% decrease in ounces produced from underground mining
    over H1 2016, mainly driven by a 16% decrease in throughput due to lower ore
    tonnes mined, together with a 12% decrease in head grade, mainly due to the
    impact of mine sequencing. AISC per ounce sold for the first half of US$1,340
    was 38% higher than H1 2016 (US$970) driven by the impact of lower sales ounces
    on individual cost items, higher cash costs and higher capitalised development
    costs, slightly offset by lower sustaining capital spend.

    Total tonnes mined during the first half amounted to 18.0 million tonnes, 7%
    lower than H1 2016, mainly as a result of a 48% decrease in total waste tonnes
    mined at Buzwagi as the open pit will conclude later this year. Ore tonnes
    mined of 7.2 million tonnes were 54% higher than H1 2016 driven predominantly
    by increased ore tonnes from Buzwagi as a result of improved access to ore
    zones in the final stage of the open pit in H1 2017.

    Ore tonnes processed amounted to 4.9 million tonnes, slightly lower than H1
    2016. Lower run of mine tonnes at Bulyanhulu and lower throughput at North Mara
    was partly offset by higher reprocessed tailing throughput at Bulyanhulu.

    Head grade for the period (excluding tailings retreatment) of 3.4g/t was 6%
    higher than in H1 2016 (3.2g/t) primarily driven by a 50% higher head grade at
    Buzwagi as a result of higher grade ore mined.

    Cash costs of US$577 per ounce sold for the year to date were 10% lower than in
    H1 2016, primarily due to:

      * Higher production base (US$23/oz);
      * Increased investment in ore stockpiles, mainly at Buzwagi (US$33/oz);
      * Lower consumable costs (US$18/oz) mainly driven by improved consumable unit
        costing and usage optimisation;
      * Increased capitalised mining, mainly driven by increased capitalised
        stripping at North Mara relating to the Nyabirama Cut 4 cutback (US$17/oz);
        and
      * Lower sales related costs due to lower sales volumes caused by the
        concentrate ban (US$34/oz)

    This was offset by

      * Lower co-product revenue in the form of copper concentrates (US$46/oz); and
      * Increased contracted services costs mainly relating to development and
        drilling contracts (US$23/oz).

    Included in cost of sales and ultimately cash cost for the first half, is a
    credit of approximately US$63.6 million (US$204/oz) relating to the build-up in
    finished gold inventory due to concentrate sales delays, which largely offsets
    the impact of the reduction in sales ounces in the cash cost per ounce sold
    calculation.

    All-in sustaining cost of US$893 per ounce sold for the first half was 5% lower
    than H1 2016, despite the lag in sales against production. This was driven by
    the lower cash costs (US$64/oz) as well as a credit relating to share based
    payment revaluation driven by the approximate 33% reduction in the Acacia share
    price (US$25/oz), partly offset by the impact of lower sales volumes on
    individual cost items (US$85/oz) and higher capitalised development costs at
    both North Mara and Bulyanhulu (US$16/oz).

    If our sales ounces equalled production, AISC for the first half would have
    been approximately US$800 per ounce sold, compared to US$916 per ounce sold on
    the same basis in H1 2016, a decrease of 13%, and excluding the impact of
    non-cash share based payment revaluation credits would have been approximately
    US$819.

    Cash from operating activities of US$1.3 million compared negatively to the
    inflow of US$157.1 from H1 2016. The inability to export our concentrate has
    had a negative impact on operating cash flow of approximately US$163 million.
    Working capital outflows mainly relating to increases in supplies inventory and
    indirect tax receivables further impacted cash generated from operating
    activities.

    Capital expenditure amounted to US$92.5 million compared to US$85.2 million in
    H1 2016. Capital expenditure primarily comprised of capitalised development and
    stripping (US$64.3 million), investment in mobile equipment and component
    change-outs at both North Mara and Bulyanhulu (US$6.6 million), investment in
    fixed equipment and mining infrastructure mainly at Bulyanhulu (US$4.6
    million), and land purchases at North Mara (US$1.2 million).

    Second Quarter Review

    Acacia recorded 5 Lost Time Injuries during the quarter with 3 at Bulyanhulu, 1
    at North Mara and 1 with Discovery in Kenya, a decrease of 37% on the same
    period in 2016. Two of the injured were Acacia employees, whilst three were
    contractor employees. Of the 9 Medically Treated Incidents in Q2 2017, all were
    contractor employees, which is a focal point in Q3 2017. Q2 Total Recordable
    Injury Frequency Rate (TRIFR) of 0.51 was 38% lower than the corresponding
    period in 2016.

    Production for Q2 2017 amounted to 208,533 ounces, a decrease of 6% on the same
    period in 2016.

    North Mara produced 83,110 ounces in Q2 2017, 17% lower than in Q2 2016 and a
    13% decrease from Q1 2017, driven by lower head grades compared to Q2 2016,
    mainly as a result of lower mine grades year on year. Total open pit tonnes
    mined decreased by 5% from Q2 2016 driven by lower waste mined in the Nyabirama
    pit while total ore tonnes mined increased by 18% compared to the same period.
    Ore tonnes from underground mining of 162kt were 91% higher in Q2 2017, due to
    Gokona underground development being at an advanced stage with access to more
    stopes compared to Q2 2016. Cash cost per ounce sold of US$476 was 25% higher
    than in Q2 2016, primarily driven by the lower production base, lower
    capitalised development costs mainly due to lower waste stripping at the
    Nyabirama pit and higher direct mining costs driven by higher labour, fuel and
    consumables cost. AISC of US$758 per ounce sold was 7% higher than in Q2 2016
    due to a lower production base and higher cash costs, partly offset by lower
    capitalised development costs and a decrease in sustaining capital expenditure.

    At Buzwagi, gold production for the quarter of 66,228 ounces was 53% higher
    than Q2 2016, and 11% ahead of Q1 2017. Total tonnes mined decreased by 22%
    from Q2 2016 while ore tonnes mined were more than double compared to the prior
    quarter due to the focus of mining at the bottom of the pit which contains more
    ore tonnes. Cash cost per ounce sold of US$705 was 26% lower than Q2 2016
    mainly due to lower direct mining costs driven by lower consumable and external
    services costs, lower sales related costs due to lower sales volumes combined
    with the impact of the higher production base partly offset by lower co-product
    revenue. AISC of US$762 per ounce sold was 25% lower than Q2 2016, primarily
    due to lower cash cost combined with a credit relating to share based payment
    valuations, partially offset by the effect of lower sales volumes on the
    individual cost items.

    Bulyanhulu produced 59,196 ounces, 25% lower than the same period in Q2 2016
    and 6% lower than Q1 2017. Ounces produced from underground mining amounted to
    50,340 ounces, a 28% decrease on Q2 2016 mainly due to lower ore tonnes
    received from underground combined with a 10% decrease in grade, while ounces
    produced from the reprocessing of tailings amounted to 8,856 ounces, an
    increase of 6%. Lower mining tonnes of 203,000 tonnes were mainly due to lower
    productivities as well as inaccessibility of certain stopes. AISC amounted to
    US$1,558 per ounce sold for the quarter, 63% higher than in Q2 2016 and 3%
    lower than Q1 2016, mainly driven by the lower production base and the effect
    of lower sales volumes on the individual cost items combined with higher cash
    costs for the quarter.

    Total tonnes mined during the quarter amounted to 8.6 million tonnes, 14% lower
    than Q2 2016 while total ore tonnes mined of 4.0 million tonnes exceeded the
    comparative period by 78%. This was mainly due to increased ore tonnes from
    North Mara and Buzwagi.

    Total tonnes processed amounted to 2.4 million tonnes, broadly in line with Q2
    2016, with head grade for the quarter (excluding tailings retreatment) of 3.3g/
    t was 11% lower than Q2 2016 (3.7g/t) due to lower grades at North Mara and
    Bulyanhulu.

    Capital expenditure for the quarter amounted to US$45.6 million compared to
    US$49.1 million in Q2 2016, a decrease of 7%. Capital expenditure primarily
    comprised capitalised development (US$30.5 million), expansion capital relating
    to capitalised drilling at North Mara (US$3.5 million), investment in fixed
    equipment and mining infrastructure (US$5.4 million) and investment in mobile
    equipment and component change-out costs (US$4.0 million).

    Mine Site Review

    Bulyanhulu

    Key statistics

                                            Three months ended 30         Six months ended 30
                                                     June                        June        
                                                                                             
    (Unaudited)                                     2017       2016            2017      2016
                                                                                             
    Key operational information:                                                             
                                                                                             
    Ounces produced                oz             59,196     78,643         122,542   157,069
                                                                                             
    Ounces sold                    oz             27,409     78,271          81,214   150,719
                                                                                             
    Cash cost per ounce sold1      US$/oz            813        662             795       661
                                                                                             
    AISC per ounce sold1           US$/oz          1,558        958           1,340       970
                                                                                             
    Copper production              Klbs            1,313      1,710           2,811     3,527
                                                                                             
    Copper sold2                   Klbs            (357)      1,574             599     3,154
                                                                                             
    Run-of-mine:                                                                             
                                                                                             
    Underground ore tonnes hoisted Kt                204        236             409       479
                                                                                             
    Ore milled                     Kt                202        250             423       502
                                                                                             
    Head grade                     g/t               8.6        9.6             8.5       9.7
                                                                                             
    Mill recovery                  %               89.9%      90.8%           90.7%     89.3%
                                                                                             
    Ounces produced                oz             50,340     70,307         104,596   140,083
                                                                                             
    Cash cost per tonne milled1    US$/t              91        185             133       180
                                                                                             
    Reprocessed tailings:                                                                    
                                                                                             
    Ore milled                     Kt                410        402             823       780
                                                                                             
    Head grade                     g/t               1.4        1.4             1.4       1.5
                                                                                             
    Mill recovery                  %               46.9%      45.6%           47.2%     45.9%
                                                                                             
    Ounces produced                oz              8,856      8,336          17,946    16,986
                                                                                             
    Capital Expenditure                                                                      
                                                                                             
     - Sustaining capital          US$             4,387      4,421           8,599    11,506
                                   ('000)                                                    
                                                                                             
     - Capitalised development     US$            14,984     15,270          31,054    28,438
                                   ('000)                                                    
                                                                                             
     - Expansionary capital        US$               504        559             982       753
                                   ('000)                                                    
                                                                                             
                                                  19,875     20,250          40,635    40,697
                                                                                             
     - Non-cash reclamation asset  US$             (851)      5,723             191     9,937
    adjustments                    ('000)                                                    
                                                                                             
    Total capital expenditure      US$            19,024     25,973          40,826    50,634
                                   ('000)                                                    

    1These are non-IFRS financial performance measures with no standard meaning
    under IFRS. Refer to 'Non-IFRS measures" on page 28 for definitions.

    2Negative sales quantities relate to the reversal of sales recorded during Q1
    2017.

    Operating performance

    Gold production for the first half of 122,542 ounces was 22% lower than the
    same period in 2016. This was due to a 25% decrease in ounces produced from
    underground mining over H1 2016, driven by a 16% decrease in throughput and a
    12% reduction in head grade During H1 2017, we increasingly experienced lower
    underground productivities which impacted both tonnes mined and head grades.
    Whilst we expect improvement on both measures in the second half, full year
    output is expected to be approximately 10% lower than previously planned.
    Production from the reprocessing of tailings saw an increase of 6% against H1
    2016 due to an increase in throughput and recoveries, which was partially
    offset by slightly lower grades.

    Production during the quarter comprised of 24,911 ounces of gold in concentrate
    and 34,285 ounces of gold in doré, amounting to a total of 55,699 ounces of
    gold in concentrate and 66,843 ounces of gold in doré for the first half of
    2017.

    Gold sold for the year to date amounted to 81,214 ounces, 46% lower than H1
    2016 and 34% lower than production, mainly as a result of the inability to
    export concentrate from early March combined with the lower production base.
    Sales ounces for the quarter also included a negative sales adjustment of 7,480
    ounces due to reversals made for concentrate shipments previously sold but
    subsequently reversed due to the concentrate not being able to leave port.

    Copper production of 2.8 million pounds for the year to date compared
    negatively to the comparative period by 20%, mainly as a result of lower copper
    grades. Copper sold was 81% lower than H1 2016, primarily due to the lack of
    exports of concentrate combined with lower copper production. Negative copper
    sales pounds for the quarter in the main relate to 342,273 pounds of copper
    concentrate, previously recorded as sales, but subsequently reversed due to the
    current export ban on mineral concentrates.

    Cash costs of US$795 per ounce sold were 20% higher than H1 2016 (US$661),
    mainly due to the lower production base (US$189/oz), increased contracted
    services costs (US$76/oz) driven by increased mine development costs and lower
    co-product revenue (US$67/oz). This was partly offset by lower sales related
    costs due to lower sales volumes (US$92/oz), lower consumable costs due to
    optimised usage and improved unit costs (US$35/oz) and lower maintenance costs
    (US$34/oz).

    AISC per ounce sold for the first half of US$1,340 was 38% higher than H1 2016
    (US$970) driven by the impact of lower sales ounces on individual cost items
    ($264/oz), higher cash cost as explained above (US$134/oz) and higher
    capitalised development costs ($32/oz), slightly offset by lower sustaining
    capital spend ($36/oz). Should we have been able to sell all ounces produced,
    AISC would have been approximately US$1,140 per ounce.

    Capital expenditure for the first half before reclamation adjustments amounted
    to US$40.6 million, slightly lower than H1 2016 (US$40.7 million). This is the
    result of lower sustaining capital expenditure offset by higher capitalised
    development. Capital expenditure mainly consisted of capitalised underground
    development costs (US$31.1 million), investment in mobile equipment and
    component change-outs (US$2.9 million) and investment in fixed equipment and
    mining infrastructure including the West fan upgrade and underground
    ventilation raise boring (US$2.9 million).

    Buzwagi

    Key statistics

                                            Three months ended 30          Six months ended 
                                                     June                      30 June      
                                                                                            
    (Unaudited)                                     2017       2016            2017     2016
                                                                                            
    Key operational information:                                                            
                                                                                            
    Ounces produced                oz             66,228     43,156         126,084   80,219
                                                                                            
    Ounces sold                    oz             15,895     42,971          53,094   80,404
                                                                                            
    Cash cost per ounce sold1      US$/oz            705        948             697    1,052
                                                                                            
    AISC per ounce sold1           US$/oz            762      1,019             770    1,124
                                                                                            
    Copper production              Klbs            3,095      2,915           6,253    4,900
                                                                                            
    Copper sold2                   Klbs            (826)      2,829             705    4,929
                                                                                            
    Mining information:                                                                     
                                                                                            
    Tonnes mined                   Kt              4,297      5,497           9,564   11,423
                                                                                            
    Ore tonnes mined               Kt              2,898      1,302           4,951    2,605
                                                                                            
    Processing information:                                                                 
                                                                                            
    Ore milled                     Kt              1,119      1,054           2,195    2,182
                                                                                            
    Head grade                     g/t               1.9        1.3             1.8      1.2
                                                                                            
    Mill recovery                  %               96.6%      94.8%           96,7%    94.6%
                                                                                            
    Cash cost per tonne milled1    US$/t              10         39              17       39
                                                                                            
    Capital Expenditure                                                                     
                                                                                            
     - Sustaining capital          US$               724      1,081             865    2,231
                                   ('000)                                                   
                                                                                            
     - Capitalised development     US$                 -          -               -        -
                                   ('000)                                                   
                                                                                            
                                                     724      1,081             865    2,231
                                                                                            
     - Non-cash reclamation asset  US$                79      1,586             (1)    3,007
    adjustments                    ('000)                                                   
                                                                                            
    Total capital expenditure      US$               803      2,667             864    5,238
                                   ('000)                                                   

    1These are non-IFRS financial performance measures with no standard meaning
    under IFRS. Refer to "Non-IFRS measures" on page 28 for definitions.

    2Negative sales quantities relate to the reversal of sales recorded during Q1
    2017.

    Operating performance

    Gold production for the first half of 126,084 ounces was 57% higher than the
    comparative period in 2016 mainly due to a 50% increase in grade as a result of
    higher grade ore mined from the main ore zone at the bottom of the stage 3 pit
    in H1 2017 compared to the focus on waste movement in the first half of 2016 in
    order to mine the stage 3 pushback. This was further assisted by a 2% increase
    in mill recoveries due to improved mill availability and improved milling
    rates.

    Production during the quarter was comprised of 40,210 ounces of gold in
    concentrate and 26,027 ounces of gold in doré, amounting to a total of 80,202
    ounces gold in concentrate and 45,882 ounces gold in doré for the first half of
    the year.

    Gold sold for the year to date amounted to 53,094 ounces, 34% lower than H1
    2016 and 58% lower than production, a direct result of the inability to export
    concentrate from early March 2017 slightly offset by a higher production base
    compared to the comparative period. Sales ounces for the quarter also included
    a negative sales adjustment of 10,724 ounces due to reversals made for
    concentrate shipments previously sold but subsequently reversed due to the
    concentrate not being able to leave port.

    Copper production of 6.3 million pounds for the year to date was 28% higher
    than the comparative period mainly due to increased copper grades. Copper sold
    was 86% lower than H1 2016, primarily due to the lack of mineral concentrate
    exports. Negative copper sales pounds for the quarter in the main relate to
    781,423 pounds of copper concentrate, previously recorded as sales, but
    subsequently reversed due to the current export ban on mineral concentrates.

    Total tonnes mined of 9.6 million tonnes were 16% lower than H1 2016, primarily
    due to the focus of mining at the bottom of the pit in H1 which contains more
    ore tonnes compared to waste movement during H1 2016 resulting in 90% higher
    ore tonnes mined during the first half of 2017.

    Cash costs for the first half of US$697 per ounce sold were significantly lower
    than H1 2016 (US$1,052/oz), primarily driven by the impact of the higher
    production base (US$315/oz), lower sales related cost due to lower sales
    volumes (US$88/oz), lower consumable spend due to lower unit costs and
    optimisation of usage (US$115/oz). This was partly offset by lower co-product
    revenue in the form of copper concentrates (US$177/oz). As a result of the
    significant inventory credit resulting from the lack of sales, cash cost per
    tonne milled of US$17 per tonne was significantly lower than the previous
    period.

    AISC per ounce sold of US$770 was 31% lower than the H1 2016. This was mainly
    driven by lower cash costs as explained above (US$354/oz). Should we have been
    able to sell all ounces produced, AISC would have been approximately US$589 per
    ounce.

    Capital expenditure before reclamation adjustments of US$0.9 million was 61%
    lower than H1 2016 (US$2.2 million). Capital expenditure for the year to date
    consisted of the corrosion treatment of the process plant and investment in
    tailings storage facility.

    North Mara

    Key statistics

                                            Three months ended 30         Six months ended 30
                                                     June                        June        
                                                                                             
    (Unaudited)                                     2017       2016            2017      2016
                                                                                             
    Key operational information:                                                             
                                                                                             
    Ounces produced                oz             83,110    100,016         179,578   174,737
                                                                                             
    Ounces sold                    oz             84,390     95,540         178,130   169,840
                                                                                             
    Cash cost per ounce sold1      US$/oz            476        382             441       427
                                                                                             
    AISC per ounce sold1           US$/oz            758        707             736       720
                                                                                             
    Open pit:                                                                                
                                                                                             
    Tonnes mined                   Kt              3,896      4,120           7,750     7,234
                                                                                             
    Ore tonnes mined               Kt                733        620           1,536     1,395
                                                                                             
    Mine grade                     g/t               1.7        2.1             1.8       1.8
                                                                                             
    Underground:                                                                             
                                                                                             
    Ore tonnes trammed             Kt                162         85             316       210
                                                                                             
    Mine grade                     g/t               8.4       13.8             9.0      11.9
                                                                                             
    Processing information:                                                                  
                                                                                             
    Ore milled                     Kt                709        705           1,419     1,436
                                                                                             
    Head grade                     g/t               4.0        4.8             4.3       4.1
                                                                                             
    Mill recovery                  %               92.3%      92.3%           92.5%     91.4%
                                                                                             
    Cash cost per tonne milled1    US$/t              57         52              55        50
                                                                                             
    Capital Expenditure                                                                      
                                                                                             
     - Sustaining capital2         US$             5,921      7,703          12,177    10,081
                                   ('000)                                                    
                                                                                             
     - Capitalised development     US$            15,485     19,396          33,282    31,051
                                   ('000)                                                    
                                                                                             
     - Expansionary capital        US$             2,953        372           4,489       458
                                   ('000)                                                    
                                                                                             
                                                  24,359     27,471          49,948    41,590
                                                                                             
     - Non-cash reclamation asset  US$             (180)      3,075            (56)     6,252
    adjustments                    ('000)                                                    
                                                                                             
    Total capital expenditure      US$            24,179     30,546          49,892    47,842
                                   ('000)                                                    

    1These are non-IFRS financial performance measures with no standard meaning
    under IFRS. Refer to 'Non-IFRS measures" on page 28 for definitions.

    2 Includes land purchases recognised as long term prepayments

    Operating performance

    Gold production for the first half of 179,578 ounces was slightly higher than
    in H1 2016. This was a result of 5% higher head grade driven by the
    preferential processing of higher grade ore from the Nyabirama pit as well as
    continued high grades from the Gokona underground mine, combined with a 1%
    improvement in recoveries. Gold ounces sold for the year of 178,130 ounces were
    5% higher than the comparative period and broadly in line with production.

    Ore tonnes from underground mining were 50% higher in the first half, due to
    Gokona underground development providing access to more stopes compared to H1
    2016.  Cemented Aggregate Fill (CAF) continues to be placed in primary stopes,
    though further work is required on the plant to ensure that forecast fill
    volumes can be maintained.

    Cash costs of US$441 per ounce sold were 3% higher than H1 2016 (US$427/oz),
    mainly driven by higher direct mining costs due to increased labour, fuel and
    consumable costs (US$52/oz), partly offset by higher capitalised development
    cost (US$23/oz) and the higher production base (US$9/oz).

    AISC of US$736 per ounce sold was 2% higher than H1 2016 (US$720/oz) primarily
    due to higher cash costs (US$14/oz), higher capitalised development costs
    (US$13/oz) and higher sustaining capital expenditure (US$12/oz) offset by the
    impact of increased sales volumes (US$14/oz).

    Capital expenditure for the year before reclamation adjustments of US$49.9
    million was 20% higher than in H1 2016 (US$41.6 million). Key capital
    expenditure include capitalised stripping costs (US$25.9 million), capitalised
    underground development costs (US$7.4 million), capitalised drilling
    expenditure (US$4.5 million) and investment in mobile equipment and component
    change-outs (US$3.7 million). In addition, US$1.2 million was spent on land
    acquisitions primarily around the Nyabirama open pit. Land acquisition costs
    are included in capital expenditure above as they are included in AISC but are
    treated as long term prepayments on the balance sheet.

    Exploration Review

    Brownfield Exploration

    Tanzania

    Significant brownfield programmes and budgets were approved for 2017 for North
    Mara to undertake surface and underground drilling activities at Gokona,
    Nyabirama, and Nyabigena. Underground drilling also continues on the Reef 2
    series at Bulyanhulu to increase confidence in the resources and reserves in
    the Reef 2 Central area.

    North Mara

    Gokona Underground

    A total of 55 holes for 7,593 metres of extension and infill drilling were
    completed at Gokona underground during H1 2017. Significant drilling activity
    during H1 was focused on delineating the western extension of the "Golden
    Banana" (East Zone) lode mineralisation between the Gokona Fault and the
    completed Gokona open pit. Several wide and high grade intercepts were returned
    from this drill programme extending the previously modelled mineralisation
    including:

      * UGKD00320         33.0m @ 38.2 g/t Au from 36m
      * UGKD00321         31.0m @ 14.7 g/t Au from 31m
      * UGKD00323         24.8m @ 133.5 g/t Au from 35m
      * UKGC_00299      29.1m @ 10.1g/t Au from 83m
      * UGKD_00303      26.0m @ 40.8g/t Au from 110m
      * UKGC_00308      23.0m @ 42.7g/t Au from 121m

    Additionally, several high grade intercepts were returned adjacent to the
    Gokona Fault on the east side of the fault extending the previously modelled
    mineralisation in this area, including:

      * UGKD_00113*     10.0m @ 10.4 g/t Au from 32m
      * UKGC_00251*     25.0m @ 7.00g/t Au from 36m
      * UGKD_00107*     24.0m @ 12.5g/t Au from 31m
      * UKGC_00262*     19.4m @ 64.7g/t Au from 37m incl. 2m @ 453g/t Au from 45m
      * UKGC_00260*     9.0m @ 59.9g/t Au from 46m incl. 3m @ 204g/t Au from 49m

    Note: * delineates results previously released in Q1 report

    In the second half of 2017, underground diamond core drilling will continue to
    test the deeper fault offset extension of the Gokona East mineralisation, test
    continuity of higher grade mineralisation beneath the existing open pit and
    immediately west of the Gokona Fault, commence drilling of the Gokona Central
    area below the open pit, and continue grade control drilling of Gokona West.
    The results from this drilling will be incorporated as part of the updating of
    the Mineral Resource Model in order to deliver increased confidence, additional
    mining areas in the upper part of the deposit; and confirm and define targets
    for on-going extensional diamond drilling. The planned programme will comprise
    of approximately 75,000 metres of drilling over the next two years, with
    approximately 45,000 metres to be drilled in 2017.

    Nyabirama

    The second stage of the surface diamond core drilling programme adjacent to the
    Nyabirama pit was completed in March, and a subsequent programme of infill
    drilling to approximately 50m drill spacing commenced and was ongoing at the
    end of H1 2017. A total of 22 holes for 12,985 metres were completed during H1
    2017. This drilling has been successful in delineating the down-dip and
    down-plunge extension of higher grade quartz-vein lode structures to a vertical
    depth of approximately 950m below surface and approximately 800m down-plunge to
    the south-west of the current open pit.

    Better results received during H1 included:

      * NBD0147             3.0m @ 5.1 g/t Au from 397m, and
                                     4.0m @ 9.1 g/t Au from 428m
      * NBD0149A           3.0m @ 66.6 g/t Au from 873m incl. 1m @ 198g/t Au from
        874m, and
                                     5.0m @ 4.8 g/t Au from 890m
      * NBD0152              6.0m @ 51.9 g/t Au from 592m incl. 1m @ 280g/t Au from
        594m
      * NBD0154              5.0m @ 4.5 g/t Au from 511m,
                                      4.0m @ 4.6g/t Au from 537m, and
                                      3.0m @ 6.5g/t Au from 546m
      * NBD0157              4.0m @ 10.8g/t Au from 264m,
                                      4.0m @ 26.7g/t Au from 325m, and
                                      7.0m @ 9.50g/t Au from 464m
      * NBD0158              11.5m @ 26.5g/t Au from 272m
      * NBD0160              4.0m @ 4.30g/t Au from 149m, and
                                      3.0m @ 13.1g/t Au from 230m

    The results of the infill programme will be incorporated into a Mineral
    Resource model to form the basis for further study on a potential underground
    development to further test the system and enable underground production by the
    time of the completion of the open pit in 2021.

    Nyabigena

    A total of 8 holes for 3,955 metres of the planned programme of approximately
    10,000m of surface diamond core drilling were completed during the first half
    of 2017 at Nyabigena. This programme was designed to test the continuity of
    mineralisation and structural framework below the existing open pit. Initial
    results returned broad zones of low grade gold mineralisation with narrow
    restricted higher grade zones, but also confirmed some of the interpreted
    structural offsets. The programme was suspended in the latter part of H1 to
    focus on surface drilling in higher priority areas and reduce overall site
    expenditure. The drilling results will be incorporated into an updated
    geological model and Mineral Resource estimate in due course.

    Bulyanhulu

    Reef 2 Central

    Underground diamond core drilling in H1 2017 was primarily focused on infill
    drilling of Reef 2 to increase the level of confidence in the Mineral Resource,
    and testing the Reef 1 structure in areas where limited to no historic drill
    testing has been undertaken. A total of 117 underground diamond drill core
    holes were completed for 30,412 metres during H1 2017, testing both the Reef 1
    and Reef 2 structures.

    In order to increase the understanding of the Reef 2 series of veins, tighter
    spaced definition drilling (50m x 50m grid) commenced in 2016 from existing
    underground development platforms in the "Reef 2m Central" area. The drilling
    coverage tested an area of approximately 570m vertical and 600m in strike
    length.

    Based on the results received to date the Reef 2m Central vein is displaying
    good continuity and has extended the mineralisation a further 100m vertically,
    and a further 150m in strike. There is a notable average grade increase of
    approximately 25% for the drilled area. Implications from all the drilling to
    date is that the overall tonnes in the resource may go down slightly but there
    is an overall grade increase and subsequent ounce increase.

    Definition drilling will continue in H2 2017 across the Reef 2m Central in
    order to define the economic limits along strike and confirming the lower
    vertical limit. Better results during the period, all true width, include:

      * UX3980- 744        3.99m @ 54.0g/t Au
      * UX3980- 734        5.22m @ 17.1g/t Au
      * UX3980- 769        3.44m @ 23.7g/t Au
      * UX3980- 729        2.86m @ 23.1g/t Au
      * UX4130- 322        3.16m @ 36.6g/t Au
      * UX4130- 324        3.80m @ 15.8g/t Au

    Greenfield Exploration

    Kenya

    West Kenya Project

    During H1 2017, we announced the maiden NI 43-101 compliant Inferred Mineral
    Resource Estimate (MRE) on the Liranda Corridor, within our West Kenya Project.
    The Inferred MRE of 3.46 million tonnes at 12.1 grams per tonne for 1.31
    million ounces is primarily located on three main zones of mineralisation at
    the Acacia prospect. The gold mineralisation at Acacia is associated with shear
    zones ranging in width from 0.5 metres to 10 metres (averaging 3 metres true
    width, dependent on the zone), hosted by a mafic volcanic sequence. The strike
    lengths of the explored sections of the main mineralised zones at Acacia vary
    between 200m and 600m and the resource is currently defined down to a vertical
    depth of 750m with the structures open down plunge.

    In addition, we identified mineralised zones on the Bushiangala prospect,
    approximately one kilometre away from the Acacia prospect, but at this stage
    this material remains unclassified due to drill density and the need to further
    understand the controls on the mineralisation and its continuity. Recent
    results from the Bushiangala prospect include: 3.0m @ 14.0 g/t Au from 386m,
    1.0m @ 18.4 g/t Au from 389m and 5.0m @ 4.13 g/t Au from 304m. Based on the
    work undertaken up to February 2017, the current scale of the mineralisation at
    Bushiangala is between 0.60Mt and 1.60Mt at a grade between 6.0g/t Au and 10.0g
    /t Au, for a metal target of between 190,000 ounces and 300,000 ounces of
    contained gold. A key element of the 2017 drilling programmes at Bushiangala is
    to both move this existing target mineralisation into the Inferred Resource
    category and to expand the scale of the targeted mineralisation.

    During H1 2017, a total of 68 diamond holes were completed or were underway at
    period end for 33,420 metres, with seven diamond core drill rigs drilling on
    various prospects. Current drilling on the Acacia prospect is targeting a
    significant expansion to the resource through testing up and down plunge
    extensions, as well as, infill drilling in areas of structural complexity and
    areas that previously returned lower grade results.

    Drilling during H1 continued to intersect significant high grade results,
    however at the end of June we had approximately 23 holes with assays pending
    due to the need to send samples to South Africa rather than to Tanzania, due to
    impact of the current export ban. As a result, the majority of the results
    received during the period are from the first quarter, although visible gold
    has been seen in 8 of the 23 holes with assays pending. Better results received
    during H1 are:

      * LCD0128* - 4.0m @ 33.9g/t Au from 302m, 4.2m @ 19.0g/t Au from 552m, and
        2.5m @ 76.7g/t Au from 577m,
      * LCD0130* - 3.1m @ 14.1 g/t Au from 197m,
      * LCD0132* - 1.3m @ 65.6g/t Au from 301m and 4.7m @ 14.0g/t Au
        from              446.5m,
      * LCD0133* - 0.5m @ 97.2g/t Au from 585.5m and 3.3m @ 10.9g/t Au from 753.7m,
      * LCD0135* - 3.3m @ 33.0g/t Au from 664.9m and 0.5m @ 25.0g/t Au from 687m,
      * LCD0138* - 1.0m @ 26.0g/t Au from 200m and 2m @ 22.6g/t Au from 214m,
      * LCD0146* - 2.5m @ 28.5g/t Au from 270.7m,
      * LCD0150* - 1.8m @ 7.56g/t Au from 457.2m and 6.0m @ 6.40g/t Au from 558m,
      * LCD0152* - 6.8m @ 12.7g/t Au from 211.7m,
      * LCD0155 - 1.0m @ 18.4g/t Au from 389m and 1.0m @ 9.44 g/t Au from 399.2m,
      * LCD0156 - 3.0m @ 9.32g/t Au from 1067.9m,
      * LCD0160 - 3.0m @ 14.0g/t Au from 386m.

    Note: * - holes reported during Q1 2017

    The current drill programme consists of approximately 48,000 metres of diamond
    core drilling, planned to be completed during Q3 2017, with the objective of
    increasing the Acacia Prospect Inferred resource, producing an initial Inferred
    resource on the Bushiangala Prospect, and testing nearby prospects east of the
    Acacia Prospect, namely the Shigokho and Shibunane Prospects. We are targeting
    a significant increase in the resource to 2 million ounces prior to the end of
    2017. We also plan to commence a scoping study looking at the potential for an
    underground mining operation during H2 2017.

    Burkina Faso

    During H1 2017 we continued to explore our properties in the highly prospective
    Houndé Belt in southwest Burkina Faso. Acacia currently has four joint ventures
    and an interest in over ~2,700km2 of prospective greenstone belt. Acacia
    manages all of the joint ventures. A major component of H1 2017 work
    programmes, apart from drilling, was to review the structural architecture of
    land holding and complete a target generation exercise using airborne
    aeromagnetic and radiometric data and ground IP geophysical data where
    available; these target generation layers are now being used with our surface
    geochemical data layers to develop priority drilling targets, and to date we
    have delineated more than 65 targets warranting follow-up by either mapping or
    reconnaissance drilling.  

    South Houndé Joint Venture - current ownership 50%, next stage earn-in to 70%

    At the South Houndé JV project we continued field-based exploration activities
    focused both on resource extensions to the Tankoro Resource and regional
    exploration programmes searching for new discoveries. Acacia has taken over
    management of the South Houndé JV and all field activities as of 1st January.
    During H1 2017 work continued to focus on the Tankoro Resource area (MM and MC
    Zones), the Tankoro Corridor prospects (Tankoro SW, Guy, Phantom and Phantom
    East) and regional targets (Ouangoro, Tyikoro, Poyo/Werienkera and Bini West).
    A total of 462 Aircore (AC) holes were drilled for a total of 26,957 metres and
    18 RC/Diamond holes were drilled for a total of 5,740m. In addition to this,
    rock chips (180) and termite mound (97) samples were collected on regional
    targets.

    Tankoro - MM and MC Zones

    During H1 we continued a programme of drilling to test the down-plunge
    extensions of higher grade gold mineralisation related interpreted cross
    structures at the MM and MC Zones within the Tankoro resource. A "results
    based" phased strategy has been adopted "cycling" the rig between the
    Chewbacca, Yoda, Anakine and Jabba zones within the MM and MC parallel
    mineralised zones.  All holes drilled to date have intersected the targeted
    porphyries and cross structures, however, in the majority of cases the
    high-grade shoots are either lower grade than expected, or of shorter strike
    extend that expected. The best potential at this stage appears to be depth
    extensions on the MC Zone where drilling has identified multiple mineralised
    porphyries and gold mineralisation in the surrounding intercalated sediments.

    Better results from MM and MC Zone included:

      * FRC1070 - 11.35m @ 3.50g/t Au from 397.5m including 6.5m @ 5.02g/t Au
      * FRC1071 - 4.1m @ 3.35g/t Au from 511.6m including 1.5m @ 8.28g/t Au
      * FRC1072 - 3.65m @ 3.01g/t Au from 533.2m including 1.1m @ 7.38g/t Au
      * FRC1075 - 6.86m @ 6.83g/t Au from 173.15m including 2m @ 18.8g/t Au, and
        3.35m @ 8.17g/t Au from 236.5m
      * FRC1076 - 3.2m @ 22.5g/t Au from 231m

    The current phase of diamond core and RC drilling continues to target
    interpreted high grade domains associated with cross-structures and is applying
    the learnings from the initial holes. Results from more recent drilling are
    pending and expected to be received during early H2 2017.

    Tankoro Corridor - Phantom, Phantom East, Guy and Southwest Extensions

    RC and diamond core drilling on the Tankoro Corridor targeting the northeast
    extension of the mineralised system at the Phantom and Phantom East prospects
    was ongoing at the end of H1, with potential mineralised zones, associated with
    sericite-pyrite-arsenopyrite alteration, observed in holes from both prospects.
    We also completed a single diamond hole at the Guy Prospect, with the hole
    cutting approximately 40m of sericite-carbonate+/-sulphide alteration and
    varying intensity of quartz veining. In the far south west of the Tankoro
    Corridor we also commenced a programme of regional Aircore drilling following
    up large areas of gold-in-soil geochemistry associated with IP chargeability
    anomalies. At the end of the period, assay results for the various Tankoro
    Corridor programmes were still pending due to a backlog of more than one month
    in the Burkina Faso assay lab. Results are expected to be received throughout
    Q3 2017.

    Ouangoro Anomaly

    Aircore drilling commenced at the beginning of February on the Ouagoro Anomaly
    with the plan to drill 19 regional 1km spaced traverses across a 15-20
    kilometre x 4 kilometre zone of semi-continuous gold-in-soil anomalism along
    several interpreted NNE-trending linear geophysical features. To date 10
    traverses have been drilled for 11,490 metres, with results for first eight
    traverses being received at period-end. Positive results have been returned
    from all traverses including better results of:

      * 20m @ 0.67g/t Au from 28m (including 2m @ 3.09g/t Au),
      * 8m @ 0.86g/t from surface (including 2m @ 2.32g/t Au),
      * 18m @ 0.61g/t Au from 6m (including 4m @ 1.69g/t Au),
      * 2m @ 1.80g/t Au from 22m,
      * 6m @ 1.04g/t Au from 78m,
      * 4m @ 1.34g/t Au from 30m,
      * 12m @ 1.73g/t Au from 42m

    Gold mineralisation and anomalism in drill chips, and observed in artisanal
    workings, is typically associated with quartz veins in sheared siltstone and
    sandstone units intruded by interpreted quartz-feldspar porphyries, with
    fresher drill chips show carbonate and silica-sericite alteration. Regionally
    the anomalous gold zones intersected in Aircore drilling occur on interpreted
    020-trending shear zones. It is anticipated that infill Aircore drilling (200m
    and 400m spaced lines) will be completed as phase 2 of the programme during H2
    2017 and H1 2018, once all results are received and interpreted.

    Central Houndé Joint Venture - current ownership 51%, next stage earn-in to 80%

    Surface geochemical sampling undertaken over the past 24 months has identified
    several very encouraging zones of gold anomalism coincident with the
    interpreted NE-trending Legue-Bongui structural corridor, including an 8km x
    2km anomalous gold zone. Additional interpretative work has identified 35
    targets associated with mapped alteration, artisanal sites, mineralised rock
    chips and/or pathfinder geochemistry (arsenic, molybdenum etc) warranting
    follow-up.

    Work during the H1 included mapping and lithological sampling, infill soil
    sampling, multi-element analysis, RC drilling and a structural interpretation
    using all available datasets. During the half, a total of 596 soil samples and
    43 rock chips were collected. During the mapping a number of west-north west
    trending mineralised structures were identified in the Legue NW Corridor, and
    rock chips taken along these structures returned a number of significant
    results. In total 21 of 49 rock chip samples returned assays >0.1g/t up to
    77.4g/t gold, including assays of 5.95g/t, 19.1g/t, 28.1g/t, 62.8g/t and 77.4g/
    t. The anomalous rock chip samples are associated with shear mafic volcanic
    rocks and boudinaged quartz vein zones. RC drilling in the Legue NW Corridor to
    test these anomalous rock chip zones commenced early June and at the end of H1
    a total of 9 RC holes for a total of 1,421 metres had been completed. Once all
    results have been received and this phase of the drilling programme has been
    completed we will assess what is required for phase 2 of the programme.

    Pinarello & Konkolikan Joint Venture (Canyon Resources Limited) - current
    ownership 75%, potential to earn 100%

    Surface geochemical sampling undertaken over the past 2 years has identified
    several very encouraging zones of gold anomalism coincident with the
    interpreted structural corridors, magnetic features and surface IP geophysical
    anomalies. During the quarter we completed a structural targeting exercise,
    reviewed the surface gold anomalies from soil sampling, and undertook
    multi-element geochemical analysis, using a portable XRF, of all samples from
    the regional soil sampling programmes. As a result of this targeting exercise
    we delineated 28 targets across the Pinarello project area, and we commenced
    field validation, geological mapping and further surface sampling programmes on
    priority target areas.

    We continue to follow up the previous season's surface geochemical and Aircore
    drilling programs at Pinarello. A total of 421 Aircore holes for an aggregate
    of 23,089 metres were completed on the Tankoro Corridor SW extension, Gaghny,
    Tangalobe, Dafala and Dopala prospects. More significant results from 2016 /
    2017 Aircore drilling campaigns were followed up with 37 RC holes for an
    aggregate of 5,803 metres. While not all results are available yet, results
    received to date are mixed with only a small number of significant gold
    intercepts warranting further follow-up.

    Results from Aircore drilling along the Tangaloble and Tankoro Corridors is
    considered positive with better results of: 3m @ 0.77g/t from 29m; 3m @ 0.72g/t
    Au from 5m; 4m @ 1.64g/t Au from 49m; 2m @ 6.0g/t Au from 57m; 6.0m @ 1.18 g/t
    Au from 14.0m, including 2.0m @ 3.09 g/t Au from 14.0m; 4m @ 0.68g/t Au from
    20m, and 8m @ 0.52g/t Au from 14m mostly associated with quartz veins, oxidised
    sulphides and haematite.

    Results from RC drilling at Gaghny and Tangalobe returned a number of anomalous
    intercepts associated with sericite-fuchsite-carbonate altered sediments and
    quartz veins-sericite-heamatite altered sediments respectively. Better
    intercepts include: 2.0m @ 0.61g/t Au from 99m and 1m @ 3.07g/t Au from 106m;
    1m @ 3.24 g/t Au from 92m; 13.0m @ 1.06 g/t Au from 136m and 5.0 m @ 0.68 g/t
    Au from 141m; 1m @ 4.85 g/t Au from 1m and 10m @ 0.44 g/t Au from 52m.

    Acacia has now earned 75% equity in the project and we have therefore entered
    the contributory/dilution phase of the JV agreement. Canyon Resources, our
    joint venture partner has elected to dilute, and the current programmes will
    increase Acacia's equity to approximately 89%. Programmes for H2 2017 include
    RC drilling, Aircore drilling, geological mapping, prospect reviews, further
    infill soil sampling and trenching.

    Frontier JV - earning 100% through option payments

    Regional regolith and geological mapping has been completed for both licences.
    A regional 800m x 400m reconnaissance BLEG soil sampling programme, combined
    with termite mound, rock chip and quartz lag sampling programmes has been
    completed. This work has identified a number of significant large scale
    gold-in-soil anomalies (soils up to 3g/t Au). A 200m x 200m infill commenced
    but has yet to be completed. A total of 6,035 soil, 44 rock chip and 1,043
    termite samples were collected during H1 2017. In addition to this a detailed
    structural magnetic interpretation and targeting exercise has been completed.
    This interpretation integrated geological and regolith mapping, Landsat, Aster
    and recently acquired high resolution airborne magnetic and radiometric data. A
    number of high quality targets have been selected for reconnaissance Aircore
    drilling. During H2 2017 work will comprise data collation and interpretation,
    infill soils sampling, multi-element work and reconnaissance Aircore drilling
    of high priority coincident geochemical and structural/magnetic targets.

    Mali

    In Mali we continued to delineate surface gold-in-soil anomalies, already
    defined in late 2016, through mapping and surface IP geophysical surveys, and
    commenced drilling programmes on the resultant targets. At the same time, we
    continued to build our land position in the Senegal-Mali Shear Zone (SMSZ) with
    a the grant of a further two land packages, one under joint venture (Bou Bou)
    and the other 100% Acacia (Gourbassi), Acacia now holds 5 exploration permits
    covering 191km2 on the SMSZ.

    Tintinba - Bane Project - earning 95% through option payments

    The Tintinba-Bane Project consists of three permits covering approximately
    150km2. These properties are located within the Kénéiba Inlier of Western Mali,
    along the world class Senegal-Mali-Shear-Zone (SMSZ), which hosts more than 50
    million ounces of gold endowment. During the half, a ground-based gradient
    array induced polarisation geophysical survey was completed (31 line km) and
    interpreted. Results from IP, soils, drilling and mapped and interpreted
    geology have been used to refine existing and define new targets for drill
    testing. At least 25 targets with co-incident IP chargeability, resistivity,
    and surface gold-in-soil anomalism have been identified.

    RC drilling commenced in mid-March 2017 aimed at testing around 18 targets in
    total with single drill fences to test for gold mineralisation and to
    understand the geology and alteration of each target in order to rank these
    targets moving forward. A total of 54 RC holes for 7,260 metres and 2 diamond
    drill holes for 206 metres were drilled. Drilling to date can be considered
    very positive as 5 of the 9 gold anomalies where results have been received
    have returned positive gold. Assay results are still pending for a number of
    drill traverses, but better higher grade results returned to date include; 4m @
    18.7g/t and 4m @ 5.62g/t, and regionally significant drill results returning
    broad zones of gold anomalism include; 13m @ 1.11g/t, 15m @ 0.50g/t, 13m @
    0.50g/t, 25m @ 0.45g/t including 7m @ 1.01g/t, 17m @ 0.71g/t and 19m @ 0.55g/t.

    Given the discovery history of several >3Moz deposits in the SMSZ, these
    results and the associated alteration on essentially single RC fences, across
    large-scale gold-in-soil anomalies can be considered very significant and
    warrant follow-up drilling.  

    Bourdala JV - earning 100% through option payments

    The Boudala JV is a joint venture with a local company over the Bou Bou licence
    located approximately 15km from the centroid of the Tintinba JV further to the
    south. The property is located within the central portion of the
    Kedougou-Kenieba Inlier and just to the east of the highly prospective
    Senegal-Mali Shear Zone. Acacia can earn up to 100% of the project through a
    series of staged payments over a period of 36 months.

    During H1 2017, six RC holes for 800 metres were completed across the Boubou
    Artisanal Prospect on the Bourdala JV licence. These returned highly anomalous
    results including: BORC005: 64m @ 0.23g/t from 10m, BORC004: 26m @ 0.31g/t from
    72m and 26m @ 0.58g/t from 104m. These results are encouraging given that the
    results occur in consecutive holes on the drill traverse and define a 50 metre
    wide zone of gold anomalism, within a 2km long artisanal site, and hole BORC005
    ended in mineralisation.

    Gourbassi Est - 100%

    During H1 2017, the Gourbassi Est convention was signed and arête for the
    licence was received. The licence is located immediately west of the Tintinba/
    Bane Project in the central Senegal Mali Shear Zone area of the
    Kedougou-Kenieba Inlier. The property is located to the west of the SMSZ in an
    area dominated by footway splays to the SMSZ. The programme for H2 2017 is to
    review the historic data and complete mapping and surface sampling programmes.
    Dependent on results of this first pass work we would complete RC and/or
    diamond core drilling during H1 2017.

    Tanzania

    Nyanzaga Joint Venture

    During the period, OreCorp Limited published the results of the Pre-Feasibility
    Study ("PFS") on the Nyanzaga Project. The PFS, led by Lycopodium Minerals Pty
    Ltd of Perth, Western Australia, delivered an optimal development scenario of a
    4Mtpa concurrent open pit ("OP") and underground ("UG") operation for
    pre-production capital costs estimate of US$287M, which includes a US$33M
    contingency. The concurrent mining schedule significantly reduced the low grade
    stockpiling scenario considered in the Scoping Study and increased the OP
    contained ounces and life of mine ("LOM") average mineralised material grade
    processed from 1.9 g/t gold in the Scoping Study to 2.0 g/t (+5%). Based on the
    PFS, the Project is expected to deliver an average gold production of 213koz
    per annum over a 12 year LOM, peaking at 249koz in Year 3 and totalling
    approximately 2.56Moz of gold produced over the LOM. The AISC and AIC are
    estimated to be US$838/oz and US$858/oz respectively over the LOM. Acacia and
    OreCorp have agreed the scope of the Definitive Feasibility Study ("DFS") and
    this commenced in the second quarter.

    OreCorp and Acacia continue to review and seek advice on the impact of the new
    legislation in Tanzania on the Nyanzaga Project. OreCorp has published an
    analysis of their preliminary view of the impact of the legislation which can
    be found on their website (www.orecorp.com.au) and indicates that the
    legislation may potentially have an adverse effect on the Nyanzaga Project. We
    note that regulations, which will assist the understanding of the
    implementation of the legislation, are not yet available and will be reviewed
    once they are.

    Financial Review

    The impact of the gold/copper concentrate export ban is evident in our
    financial performance, and most notably in cash flow generation. However, in an
    effort to minimising the impact, we have further increased our focus on cost
    control and capital allocation. The key aspects of our financial performance
    over the first half of 2017 is summarised below, and should be read in
    conjunction with the consolidated condensed interim financial information:

      * Revenue of US$391.7 million was US$113.3 million lower than H1 2016 driven
        by the 22% decrease in sales volumes mainly as a result of our inability to
        sell gold/copper concentrate which deferred approximately US$175 million in
        gross revenue.
      * Cash costs decreased to US$577 per ounce sold in the first half of 2017
        from US$640 per ounce sold in H1 2016, driven by the higher production
        base, lower sales related costs, higher capitalisation of development costs
        and lower consumables costs, partly offset by lower co-product revenue and
        increased contracted services costs.
      * AISC at US$893 per ounce sold was 5% lower than in H1 2016 (US$941 per
        ounce sold), mainly due to lower cash costs and non-cash share based
        payment revaluation credits, partly offset by lower sales volumes despite
        the higher production base.
      * As a result of the above and in combination with higher exploration
        charges, EBITDA decreased by 13% to US$161.4 million.
      * Lower tax expense of US$37.0 million compared to the prior year expense of
        US$107.7 million. The current year charge is driven by year to date
        profitability mainly from North Mara, while the prior year expense included
        the recognition of US$70 million of tax provisions relating to prior year
        tax disputes.
      * As a result of the above, net earnings amounted to US$62.5 million,
        compared to a loss of US$6.1 million in H1 2016.

      * Adjusted net earnings of US$65.9 million were US$7.1 million higher than H1
        2016. Adjusted earnings per share amounted to US16.1 cents, up from US14.3
        cents in H1 2016.
          + Operational cash flow of US$1.3 million decreased from H1 2016,
            primarily as a result lower revenue as discussed above, unfavourable
            working capital outflows due to a build-up of gold inventory and
            supplies, an increase in indirect taxes receivable, and payments of
            US$26.7 million relating to prepaid and provisional corporate tax.

    The following review provides a detailed analysis of our consolidated results
    for 6 months ended 30 June 2017 and the main factors affecting financial
    performance. It should be read in conjunction with the unaudited consolidated
    financial information and accompanying notes on pages 36 to 58, which have been
    prepared in accordance with International Financial Reporting Standards as
    adopted for use in the European Union ("IFRS").

    Revenue

    Revenue for H1 2017 of US$391.7 million was US$113.3 million lower than H1 2016
    due to a 22% decrease in gold sales volumes from Bulyanhulu and Buzwagi (88,525
    ounces) offset by a 5% increase in sales ounces from North Mara and a 2%
    increase in the average net realised gold price from US$1,209 per ounce sold in
    H1 2016 to US$1,235 in H1 2017.

    The decrease in revenue during the first half of 2017 was primarily driven by
    the ban on export of mineral concentrates which also resulted in a negative
    sales adjustment of 18,204 ounces, approximately US$22.0 million in revenues,
    due to reversals made for concentrate shipments sold in Q1 2017 due to the
    concentrate not being able to leave port.

    The net realised gold price for the year to date of US$1,235/oz was US$3/oz
    lower than the average market price of US$1,238/oz due to the timing of sales.
    There were no realised losses related to gold hedges during H1 2017.

    Included in total revenue is co-product revenue of US$5.8 million for the 2017
    year to date, 71% lower than the prior period (US$20.3 million), this as a
    result of the lack of concentrate sales from early March 2017. The 2017 half
    year average realised copper price of US$2.99 per pound compared favourably to
    that of H1 2016 (US$2.13 per pound), and was mainly driven by the higher market
    price for copper. The benefit of a higher copper price is however not reflected
    in H1 2017 revenues due to a 83% decrease in copper sales volumes. Included in
    co-product revenue is a negative sales adjustment of 1.1 million copper pounds,
    approximately US$3.0 million in revenues, due to reversals made for concentrate
    shipments sold in Q1 2017 but subsequently reversed due to the concentrate not
    being able to leave port.

    The impact of the ban during the first half of the year has meant that we have
    approximately 127,000 ounces of gold contained in unsold concentrate. In
    addition, we have approximately 8.3 million pounds of copper and 107,000 ounces
    of silver contained in unsold concentrate. If these have been sold, gross
    revenue and cashflow would have increased by approximately US$175 million.

    Cost of sales

    Cost of sales was US$244.0 million for H1 2016, representing a decrease of 31%
    on the prior year period (US$355.4 million). The key aspects impacting the cost
    of sales for the year include an 32% reduction in direct mining costs,
    primarily driven by higher capitalised mining costs including a credit of
    approximately US$63.3 million relating to a build-up of finished gold ounces,
    combined with lower depreciation and amortisation costs as a result of the
    lower production base at Bulyanhulu, lower sales related cost due to lower
    sales volumes and minimal realised losses on economic hedges due to majority of
    options reaching their settlement date during 2016.

    The table below provides a breakdown of cost of sales:

                                       Three months ended 30 June       Six months ended 30 
    (US$'000)                                                                  June         
                                                                                            
    (Unaudited)                                   2017        2016        2017          2016
                                                                                            
    Cost of Sales                                                                           
                                                                                            
    Direct mining costs                         61,527     118,535     160,310       234,436
                                                                                            
    Third party smelting and refining            1,417       6,782       6,738        13,639
    fees                                                                                    
                                                                                            
    Realised losses on economic hedges             170       2,539         278         6,454
                                                                                            
    Royalty expense                              8,040      12,517      18,682        22,534
                                                                                            
    Depreciation and amortisation*              23,417      43,166      57,959        78,376
                                                                                            
    Total                                       94,571     183,539     243,967       355,439

    * Depreciation and amortisation includes credits relating to the depreciation
    component of the cost of inventory build-up of US$12.8 million for Q2 2017 (Q2
    2016: US$0.9 million) and US$15.8 million for H1 2017 (H1 2016: US$5.7
    million).

    A detailed breakdown of direct mining expenses is shown in the table below:

                                          Three months ended 30 June    Six months ended 30 
    (US$'000)                                                                   June        
                                                                                            
    (Unaudited)                                    2017         2016         2017       2016
                                                                                            
    Direct mining costs                                                                     
                                                                                            
    Labour                                       23,859       21,728       47,261     43,789
                                                                                            
    Energy and fuel                              21,161       21,387       44,604     41,875
                                                                                            
    Consumables                                  22,262       26,482       47,168     52,939
                                                                                            
    Maintenance                                  26,357       27,494       52,123     53,735
                                                                                            
    Contracted services                          33,483       33,829       69,497     62,383
                                                                                            
    General administration costs                 21,788       22,362       42,309     43,085
                                                                                            
    Gross direct mining costs                   148,910      153,282      302,962    297,806
                                                                                            
    Capitalised mining costs                   (87,383)     (34,747)    (142,652)   (63,370)
                                                                                            
    Total direct mining costs                    61,527      118,535      160,310    234,436

    Gross direct mining costs of US$303.0 million for H1 2017 were 2% higher than
    H1 2016 (US$297.8 million). The overall increase was driven by the following:

      * An 11% increase in contracted services mainly at Bulyanhulu due to higher
        costs associated to underground drilling combined with higher underground
        metres drilled, increased service cost for power generation and contractors
        employed as part of various mine projects;
      * An 8% increase in labour cost, mainly as a result of production bonuses
        paid out at North Mara and Buzwagi; and
      * A 7% increase in energy and fuel expenses driven by higher tonnes mined at
        North Mara resulting in higher costs relating to fuel and lubricants.

    This was offset by:

      * A 11% decrease in consumables costs mainly at Buzwagi due to lower reagents
        and chemicals costs as a result of lower cyanide usage, lower grinding
        media costs driven by the optimised usage of grinding balls, lower
        explosives costs driven by improved blasting practice combined with lower
        processing consumables used at Bulyanhulu driven by lower tonnes processed
        as well as efficient usage of reagents; and
      * A 3% decrease in maintenance costs mainly at Bulyanhulu due to reduced
        maintenance activity and changes to the maintenance schedules showing
        continued benefits from planned maintenance activities.

    Capitalised direct mining costs, consisting of capitalised development costs
    and investment in inventory is made up as follows:

                                           Three months ended 30 June    Six months ended 30 
    (US$'000)                                                                    June        
                                                                                             
    (Unaudited)                                     2017         2016         2017       2016
                                                                                             
    Capitalised direct mining                                                                
    costs                                                                                    
                                                                                             
    Capitalised development                     (25,962)     (30,210)     (56,530)   (51,369)
    costs                                                                                    
                                                                                             
    Investment in inventory                     (61,420)      (4,537)     (86,122)   (12,001)
                                                                                             
    Total capitalised direct                    (87,382)     (34,747)    (142,652)   (63,370)
    mining costs                                                                             

    Capitalised development costs were 125% higher than H1 2016, primarily driven
    by a build-up of concentrates in gold ounces at Bulyanhulu and Buzwagi
    resulting in an investment in inventory of US$86.1 million. The increase in
    capitalised development cost mainly relate to higher gross direct mining cost
    at North Mara resulting in 10% higher capitalised development during H1 2017.

    Central costs

    Total central costs amounted to US$4.7 million for H1 2017, a 84% decrease on
    H1 2016 (US$29.4 million) mainly driven by a non-cash share based payment
    revaluation credit as a result of the lower share price and share price
    performance compared to 2016, specifically when compared to our peers and the
    global mining index, impacting on the valuation of future share-based payment
    liabilities to employees. Acacia's share price decreased by approximately 31%
    compared to December 2016. This was partly offset by a 28% increase in
    corporate administration costs as a result of higher legal and consulting fees
    paid, slightly offset by lower labour cost across all offices during H1 2017.

                                         Three months ended 30 June      Six months ended 30  
    (US$'000)                                                                    June         
                                                                                              
    (Unaudited)                                   2017         2016        2017           2016
                                                                                              
    Corporate administration                     5,878        4,469      12,520          9,771
                                                                                              
    Share-based payments                      (18,209)       15,697     (7,785)         19,635
                                                                                              
    Total central costs                         12,331       20,166       4,735         29,406

    Exploration and evaluation costs

    Exploration and evaluation costs of US$16.2 million were incurred in H1 2017,
    45% higher than the US$11.2 million spent in H1 2016. The key focus areas for
    the half year were greenfield exploration programmes in West Kenya amounting to
    US$8.0 million and greenfield exploration programmes in West Africa amounting
    to US$7.2 million.

    Corporate social responsibility expenses

    Corporate social responsibility costs incurred for H1 2017 amounted to US$3.7
    million compared to the prior year of US$4.6 million. Corporate social
    responsibility overheads and central initiatives in H1 2017 amounted to US$2.3
    million and was higher compared to US$2.1 million in H1 2016. General community
    projects funded from the Acacia Maendeleo Fund amounted to US$1.4 million,
    which was US$1.2 million lower than in H1 2016, driven by the timing of
    projects starting.

    Other charges

    Other charges in H1 2017 amounted to US$19.6 million, compared to an income of
    US$2.2 million in H1 2016. The main contributors include foreign exchange
    losses of US$4.6 million, legal costs of US$4.6 million mainly relating to
    legal representation on historical court cases, retrenchment costs of US$3.3
    million and Acacia's ongoing programme of zero cost collar contracts to
    mitigate the negative impact of copper, rand and fuel market volatility, which
    resulted in a mark-to-market revaluation loss of US$2.4 million (as these
    arrangements do not qualify for hedge accounting these unrealised gains are
    recorded through profit and loss). The charges were partly offset by income of
    US$1.8 million generated through the sale of a mineral royalty previously held
    by Acacia.

    Finance expense and income

    Finance expense of US$5.5 million for H1 2017 was in line with H1 2016 (US$5.4
    million). The key components were borrowing costs relating to the Bulyanhulu
    CIL facility (US$1.6 million) which were lower than the prior year due to a
    lower outstanding facility following repayments, lower accretion expenses of
    US$1.7 million relating to the discounting of the environmental reclamation
    liability and US$1.5 million relating to the servicing of the US$150 million
    undrawn revolving credit facility. Other costs include bank charges and
    interest on finance leases.

    Finance income relates predominantly to interest charged on non-current
    receivables and interest received on money market funds. Refer to note 8 of the
    condensed financial information for details.

    Taxation matters

    The total income tax charge was US$37.0 million compared to the prior year
    expense of US$107.7 million. The current tax charge of US$31.8 million (H1
    2016: US$64.4 million) was predominantly made up of current year income tax for
    North Mara, driven by year to date profitability, in combination with deferred
    tax charges of US$5.2 million (2016: US$43.3 million) which reflects movements
    in temporary differences. The tax expense for H1 2016 of US$107.7 million
    included US$69.9 million relating to tax provisions raised for historical tax
    disputes. The effective tax rate in H1 2017 amounted to 37% compared to 106% in
    H1 2016.

    During H1 2017, we made provisional corporate tax payments of US$17.3 million
    relating to North Mara, which is based on the pro rata portion of North Mara's
    expected full year profitability. These provisional corporate tax payments have
    been offset against the indirect tax receivable covered under the Memorandum of
    Settlement entered into with the Tanzanian Government in 2011, and as a result,
    were not paid in cash. In addition, during H1 2017 we have also made a prepaid
    tax payment of US$9.5 million relating to a advance payment on a dispute raised
    on claimed historical North Mara taxes, which was paid in cash.

    Net earnings and earnings per share

    As a result of the factors discussed above, net earnings for H1 2017 were
    US$62.5 million, against the prior year loss of US$6.1 million.

    Earnings per share for H1 2017 amounted to US15.3 cents, an increase of US16.8
    cents from the prior year loss per share of US1.5 cents. The increase was
    driven by the higher earnings, with no change in the underlying issued shares.

    Adjusted net earnings and adjusted earnings per share

    Adjusted net earnings for the first half was US$65.9 million compared to
    US$58.8 million in H1 2016. Net earnings in the periods as described above have
    been adjusted for the impact of items such as prior year tax provisions,
    discounting of indirect tax receivables, restructuring costs, insurance
    proceeds as well as legal settlements. Refer to page 30 for reconciliation
    between net profit and adjusted net earnings.

    Adjusted earnings per share for H1 2017 amounted to US16.1 cents, an increase
    of US1.8 cents from H1 2016 adjusted earnings per share of US14.3 cents.

    Financial position

    Acacia had cash and cash equivalents on hand of US$175.9 million as at 30 June
    2017 (US$317.8 million as at 31 December 2016). The Group's cash and cash
    equivalents are with counterparties whom the Group considers to have an
    appropriate credit rating. Location of credit risk is determined by physical
    location of the bank branch or counterparty. Investments are held mainly in
    United States dollars, with cash and cash equivalents in other foreign
    currencies maintained for operational requirements.

    During 2013, a US$142 million facility ("Facility") was put in place to fund
    the bulk of the costs of the construction of the Bulyanhulu tailings
    retreatment project ("Project"). The Facility is collateralised by the Project,
    and has a term of seven years with a spread over Libor of 250 basis points. The
    seven year Facility is repayable in equal instalments (bi-annual) over the term
    of the Facility, after a two year repayment holiday period. The interest rate
    has been fixed at 3.6% through the use of an interest rate swap. The full
    facility of US$142 million was drawn in 2013. During 2017, the 4th repayment
    amounting to US$14.2 million in total was made. At 30 June 2017, the
    outstanding capital balance is US$85.2 million (30 June 2016: US$113.6
    million).

    The above complements the existing undrawn revolving credit facility of US$150
    million, which runs until November 2019.

    The net book value of property, plant and equipment increased from US$1.41
    billion as at 30 June 2016 to US$1.47 billion as at 30 June 2017. The main
    capital expenditure drivers have been explained above, and have been offset by
    depreciation charges of US$69.7 million. Refer to note 12 to the condensed
    financial information for further details.

    The current portion of inventories increased from US$195.7 million as at 30
    June 2016 to US$280.7 million as at 30 June 2017. This was mainly due to an
    increase of US$83.6 million relating to finished goods. Total gold ounces on
    hand of 138,113 ounces as at 30 June 2017 comprised 126,931 ounces of gold in
    concentrate and 11,202 ounces of gold in doré.

    Total indirect tax receivables increased from US$136.4 million as at 31
    December 2016 to US$165.5 million as at 30 June 2017. The increase was mainly
    due to no VAT refunds received as a result of ongoing audits by the Tanzanian
    Revenue Authority on submitted VAT returns. Our gross increase in receivables,
    before the corporate tax prepayment offset, amounted to approximately US$47
    million. This was partly offset by corporate tax prepayments of US$17.3 million
    and revaluation losses with the net increase in receivables being US$29.1
    million.

    The net deferred tax position was a liability of US$156.8 million as at 30 June
    2016 compared to the liability of US$152.1 million as at 31 December 2016. This
    was mainly as a result of temporary difference at Buzwagi during the current
    period.

    Net assets increased from US$1.86 billion as at 31 December 2016 to US$1.90
    billion as at 30 June 2017. The increase reflects the current year income of
    US$62.5 million and the payment of the final 2016 dividend of US$34.4 million.

    Cash flow generation and capital management

    Cash flow

    (US$000)                         Three months ended 30 June        Six months ended 30 
                                                                              June         
                                                                                           
    (Unaudited)                                2017           2016          2017       2016
                                                                                           
    Cash (used in)/ generated from         (23,909)        104,864         1,315    157,096
    operating activities                                                                   
                                                                                           
    Cash used in investing                 (47,250)       (46,347)      (94,786)   (80,272)
    activities                                                                             
                                                                                           
    Cash used in financing                 (34,447)       (11,490)      (48,585)   (25,690)
    activities                                                                             
                                                                                           
    (Decrease)/ increase in cash          (105,606)         47,027     (142,056)     51,134
                                                                                           
    Foreign exchange difference on               50           (99)           151       (45)
    cash                                                                                   
                                                                                           
    Opening cash balance                    281,442        237,429       317,791    233,268
                                                                                           
    Closing cash balance                    175,886        284,357       175,886    284,357

    Cash flow from operating activities was US$1.3 million for H1 2017, a decrease
    of US$155.8 million from H1 2016 (US$157.1 million). The decrease relates to
    unfavourable working capital outflows of US$159.7 million compared to outflows
    of US$16.3 million in H1 2016, provisional income tax paid of US$17.3 million
    and a US$9.5 million corporate tax dispute deposit included in other current
    assets, compared to total tax payments of US$10 million in H1 2016 combined
    with the impact of lower operating profit mainly due to lost margins on lower
    gold sales volumes (US$10.7 million). This was offset by the impact of lower
    non-cash expenses of US$8.2 million which include unrealised gains on
    derivatives of US$2.4 million and foreign exchange differences of US$4.6
    million.

    The working capital outflow relates to a net increase in inventories on hand of
    US$113.2 million driven by the higher production base and lower sales volumes,
    and a net increase in indirect tax receivables on a cash basis of approximately
    US$30.0 million.

    Cash flow used in investing activities was US$94.8 million for H1 2017, an
    increase of 18% when compared to H1 2016 (US$80.3 million), driven by higher
    capitalised development at both North Mara and Bulyanhulu, partly offset by
    lower sustaining capital expenditure at Bulyanhulu and Buzwagi.

    A breakdown of total capital and other investing capital activities for 2017 is
    provided below:

    (US$'000)                                                Six months ended 30 June     
                                                                                          
    (Unaudited)                                                      2017             2016
                                                                                          
    Sustaining capital                                           (30,204)         (21,906)
                                                                                          
    Capitalised development                                      (64,337)         (59,489)
                                                                                          
    Expansionary capital                                          (5,523)          (1,211)
                                                                                          
    Total cash capital                                          (100,064)         (82,606)
                                                                                          
    Non-current asset movement1                                     5,278            2,334
                                                                                          
    Cash used in investing activities                            (94,786)         (80,272)
                                                                                          
    Capital expenditure reconciliation:                                                   
                                                                                          
    Total cash capital                                            100,064           82,606
                                                                                          
    Land purchases                                                  1,247            2,824
                                                                                          
    Movement in capital accruals                                  (8,855)            (258)
                                                                                          
    Capital expenditure                                            92,456           85,172
                                                                                          
    Land purchases classified as long term                        (1,247)          (2,824)
    prepayments                                                                           
                                                                                          
    Non-cash rehabilitation asset                                     134           19,196
    adjustment                                                                            
                                                                                          
    Total capital expenditure per segment                          91,343          101,544
    note                                                                                  

    1 Non-current asset movements relates to the movement in Tanzania government
    receivables, other long term assets and the sale of a mineral royalty.

    Sustaining capital

    Sustaining capital expenditure includes investment in mobile equipment and
    component change-outs (US$6.6 million), investment in fixed equipment and
    mining infrastructure including the West fan upgrade and underground
    ventilation raise boring at Bulyanhulu (US$9.7 million) and other sustaining
    capital expenditure across sites of US$13.9 million. During the first half,
    capital accruals from December 2016 of US$8.9 million were paid.

    Capitalised development

    Capitalised development includes North Mara capitalised stripping costs
    (US$25.9 million) and capitalised underground development (US$7.4 million) and
    Bulyanhulu capitalised underground development costs (US$31.1 million).

    Expansionary capital

    Expansionary capital expenditure consisted mainly of capitalised expansion
    drilling at North Mara (US$4.5 million) and Bulyanhulu (US$1.0 million).

    Non-cash capital

    Non-cash capital was a negative US$8.8 million and consisted mainly of a
    decrease in capital accruals (US$8.9 million) and reclamation asset adjustments
    (US$0.1 million). The reclamation adjustments were driven by changes in US risk
    free rates driving changes in discount rates and closure costs assumptions.

    Other investing capital

    During H1 2017 North Mara incurred land purchases totalling US$1.2 million (H1
    2016: US$2.8 million).

    Cash flow used in financing activities for H1 2017 of US$48.6 million, an
    increase of US$22.9 million from US$25.7 million in H1 2016. The outflow
    relates to payment of the final 2016 dividend of US$34.4 million and the
    payment of the 4th instalment of the borrowings related to the Bulyanhulu CIL
    facility totalling US$14.2 million.

    Dividend

    The final 2016 dividend of US8.4 cents per share was paid to shareholders on 25
    May 2017. The Board of Directors have not recommended an interim dividend for
    2017 as a result of the negative free cashflow generation over H1 2017, in line
    with our dividend policy.

    Significant judgements in applying accounting policies and key sources of
    estimation uncertainty

    Many of the amounts included in the condensed consolidated financial
    information require management to make judgements and/or estimates. These
    judgements and estimates are continuously evaluated and are based on
    management's experience and best knowledge of the relevant facts and
    circumstances, but actual results may differ from the amounts included in the
    condensed consolidated financial information included in this release.
    Information about such judgements and estimation is included in the accounting
    policies and/or notes to the consolidated financial statements, and the key
    areas are summarised below.

    Areas of judgement and key sources of estimation uncertainty that have the most
    significant effect on the amounts recognised in the condensed consolidated
    financial statements include:

      * Estimates of the quantities of proven and probable gold and copper
        reserves;
      * Estimates included within the life-of-mine planning such as the timing and
        viability of processing of long term stockpiles;
      * The capitalisation of production stripping costs;

      * The capitalisation of exploration and evaluation expenditures;
      * Review of goodwill, tangible and intangible assets' carrying value, the
        determination of whether a trigger for an impairment review exist, whether
        these assets are impaired and the measurement of impairment charges or
        reversals, and also includes the judgement of reversal of any previously
        recorded impairment charges;
      * The estimated fair values of cash generating units for impairment tests,
        including estimates of future costs to produce proven and probable
        reserves, future commodity prices, foreign exchange rates and discount
        rates;
      * The estimated useful lives of tangible and long-lived assets and the
        measurement of depreciation expense;
      * Recognition of a provision for environmental rehabilitation and the
        estimation of the rehabilitation costs and timing of expenditure;
      * Whether to recognise a liability for loss contingencies and the amount of
        any such provision;
      * Whether to recognise a provision for accounts receivable, and in particular
        the indirect tax receivables from the Tanzanian Government, a provision for
        obsolescence on consumables inventory and the impact of discounting the
        non-current element of the indirect tax receivable;
      * Recognition of deferred income tax assets, amounts recorded for uncertain
        tax positions, the measurement of income tax expense and indirect taxes;
      * Determination of the cost incurred in the productive process of ore
        stockpiles, gold in process, gold doré/bullion and concentrate, as well as
        the associated net realisable value and the split between the long term and
        short term portions;
      * Determination of fair value of derivative instruments; and
      * Determination of fair value of share options and cash-settled share-based
        payments.

    Non-IFRS Measures

    Acacia has identified certain measures in this report that are not measures
    defined under IFRS. Non-IFRS financial measures disclosed by management are
    provided as additional information to investors in order to provide them with
    an alternative method for assessing Acacia's financial condition and operating
    results, and reflects more relevant measures for the industry in which Acacia
    operates. These measures are not in accordance with, or a substitute for, IFRS,
    and may be different from or inconsistent with non-IFRS financial measures used
    by other companies. These measures are explained further below.

    Net average realised gold price per ounce sold is a non-IFRS financial measure
    which excludes from gold revenue:

    - Unrealised gains and losses on non-hedge derivative contracts; and

    - Export duties

    It also includes realised gains and losses on gold hedge contracts reported as
    part of cost of sales.

    Net average realised gold price per ounce sold have been calculated as follow:

    (US$000)                            Three months ended 30 June     Six months ended 30 
                                                                              June         
                                                                                           
    (Unaudited)                                     2017       2016         2017       2016
                                                                                           
    Gold revenue                                 160,231    272,728      385,859    484,614
                                                                                           
    Less: Realised gold hedge losses                   -          -            -          -
                                                                                           
    Net gold revenue                             160,231    272,728      385,859    484,614
                                                                                           
    Gold sold (ounces)                           127,694    216,782      312,438    400,963
                                                                                           
    Net average realised gold price                1,255      1,258        1,235      1,209
    (US$/ounce)                                                                            

    Cash cost per ounce sold is a non-IFRS financial measure. Cash costs include
    all costs absorbed into inventory, as well as royalties, and production taxes,
    and exclude capitalised production stripping costs, inventory purchase
    accounting adjustments, unrealised gains/losses from non-hedge currency and
    commodity contracts, depreciation and amortisation and corporate social
    responsibility charges. Cash cost is calculated net of co-product revenue. Cash
    cost per ounce sold is calculated by dividing the aggregate of these costs by
    total ounces sold.

    The presentation of these statistics in this manner allows Acacia to monitor
    and manage those factors that impact production costs on a monthly basis. Cash
    costs and cash cost per ounce sold are calculated on a consistent basis for the
    periods presented.

    The table below provides a reconciliation between cost of sales and total cash
    cost to calculate the cash cost per ounce sold.

                                             Three months ended 30      Six months ended 30 
    (US$'000)                                        June                       June        
                                                                                            
    (Unaudited)                                      2017      2016         2017        2016
                                                                                            
    Total cost of sales                            94,571   183,539      243,967     355,439
                                                                                            
    Deduct: depreciation and                     (23,417)  (43,166)     (57,959)    (78,376)
    amortisation*                                                                           
                                                                                            
    Deduct: Co-product revenue                      2,468  (11,309)      (5,805)    (20,333)
                                                                                            
    Total cash cost                                73,622   129,064      180,203     256,730
                                                                                            
    Total ounces sold                             127,694   216,782      312,438     400,963
                                                                                            
    Total cash cost per ounce                         577       595          577         640
    sold                                                                                    

    * Depreciation and amortisation includes the depreciation component of the cost
    of inventory sold

    All-in sustaining cost (AISC) is a non-IFRS financial measure. The measure is
    in accordance with the World Gold Council's guidance issued in June 2013. It is
    calculated by taking cash cost per ounce sold and adding corporate
    administration costs, share-based payments, reclamation and remediation costs
    for operating mines, corporate social responsibility expenses, mine exploration
    and study costs, realised gains and/or losses on operating hedges, capitalised
    stripping and underground development costs and sustaining capital expenditure.
    This is then divided by the total ounces sold. A reconciliation between cash
    cost per ounce sold and AISC for the key business segments is presented below:

    (Unaudited)          Three months ended 30 June 2017        Three months ended 30 June 2016  
                                                                                                 
    (US$/oz sold)       Bulyanhulu  North   Buzwagi  Group*   Bulyanhulu  North   Buzwagi  Group*
                                     Mara                                  Mara                  
                                                                                                 
    Cash cost per              813    476       705     577          662    382       948     595
    ounce sold                                                                                   
                                                                                                 
    Corporate                   44     21        81      46           16     17        23      21
    administration                                                                               
                                                                                                 
    Share based               (38)   (13)      (78)   (143)           15      8        14      72
    payments                                                                                     
                                                                                                 
    Rehabilitation              23     10        11      13            8      9         2       7
                                                                                                 
    CSR expenses                 9     10       (3)      12            7      7         6       8
                                                                                                 
    Capitalised                547    184         -     239          195    203         -     160
    development                                                                                  
                                                                                                 
    Sustaining capital         160     70        46      91           55     81        26      63
                                                                                                 
    Total AISC               1,558    758       762     835          958    707     1,019     926

    * The group total includes a credit of US$95/oz of unallocated corporate
    related costs in Q2 2017, and a cost of US$66/oz in Q2 2016.

    (Unaudited)            Six months ended 30 June 2017        Six months ended 30 June 2016   
                                                                                                
    (US$/oz sold)        Bulyanhulu  North Buzwagi  Group*    Bulyanhulu   North Buzwagi  Group*
                                      Mara                                  Mara                
                                                                                                
    Cash cost per ounce         795    441     697     577           661     427   1,052     640
    sold                                                                                        
                                                                                                
    Corporate                    36     23      48      40            21      24      25      24
    administration                                                                              
                                                                                                
    Share based payments        (4)    (2)     (6)    (25)            11       7      11      49
                                                                                                
    Rehabilitation               16     10       7      11             7       9       3       7
                                                                                                
    CSR expenses                  8      8       7      12             5      11       7      12
                                                                                                
    Capitalised                 382    187       -     206           189     183       0     148
    development                                                                                 
                                                                                                
    Sustaining capital          107     69      17      72            76      59      26      61
                                                                                                
    Total AISC                1,340    736     770     893           970     720   1,124     941

    * The group total includes a credit of US$5/oz of unallocated corporate related
    costs in H1 2017, and a cost of US$46/oz in H1 2016.

    AISC is intended to provide additional information on the total sustaining cost
    for each ounce sold, taking into account expenditure incurred in addition to
    direct mining costs and selling costs.

    Cash cost per tonne milled is a non-IFRS financial measure. Cash costs include
    all costs absorbed into inventory, as well as royalties, co-product credits,
    and production taxes, and exclude capitalised production stripping costs,
    inventory purchase accounting adjustments, unrealised gains/losses from
    non-hedge currency and commodity contracts, depreciation and amortisation and
    corporate social responsibility charges. Cash cost is calculated net of
    co-product revenue. Cash cost per tonne milled is calculated by dividing the
    aggregate of these costs by total tonnes milled.

    EBITDA is a non-IFRS financial measure. Acacia calculates EBITDA as net profit
    or loss for the period excluding:

      * Income tax expense;
      * Finance expense;
      * Finance income;
      * Depreciation and amortisation; and
      * Impairment charges of goodwill and other long-lived assets.

    EBITDA is intended to provide additional information to investors and analysts.
    It does not have any standardised meaning prescribed by IFRS and should not be
    considered in isolation or as a substitute for measures of performance prepared
    in accordance with IFRS. EBITDA excludes the impact of cash costs of financing
    activities and taxes, and the effects of changes in operating working capital
    balances, and therefore is not necessarily indicative of operating profit or
    cash flow from operations as determined under IFRS. Other companies may
    calculate EBITDA differently.

    A reconciliation between net profit for the period and EBITDA is presented
    below:

    (US$000)                           Three months ended 30 June     Six months ended 30  
                                                                             June          
                                                                                           
    (Unaudited)                                 2017         2016          2017        2016
                                                                                           
    Net profit/(loss) for the period          35,716       46,282        62,543     (6,128)
                                                                                           
    Plus income tax expense/(credit)          17,819       27,567        37,002     107,744
                                                                                           
    Plus depreciation and amortisation        23,417       43,166        57,959      78,376
                                                                                           
    Plus finance expense                       3,216        2,514         5,454       5,380
                                                                                           
    Less finance income                        (946)        (197)       (1,543)       (490)
                                                                                           
    EBITDA                                    79,222      119,332       161,415     184,882

    *Depreciation and amortisation includes the depreciation component of the cost
    of inventory sold.

    Adjusted EBITDA is a non-IFRS financial measure. It is calculated by excluding
    one-off costs or credits relating to non-routine transactions from EBITDA. It
    excludes other credits and charges that, individually or in aggregate, if of a
    similar type, are of a nature or size that requires explanation in order to
    provide additional insight into the underlying business performance. EBITDA is
    adjusted for items (a) to (c) as contained in the reconciliation to adjusted
    net earnings below.

    EBIT is a non-IFRS financial measure and reflects EBITDA adjusted for
    depreciation and amortisation and goodwill impairment charges.

    Adjusted net earnings is a non-IFRS financial measure. It is calculated by
    excluding certain costs or credits relating to non-routine transactions from
    net profit attributed to owners of the parent. It includes other credit and
    charges that, individually or in aggregate, if of a similar type, are of a
    nature or size that requires explanation in order to provide additional insight
    into the underlying business performance.

    Adjusted net earnings and adjusted earnings per share have been calculated as
    follows:

    (US$000)                           Three months ended 30 June     Six months ended 30  
                                                                             June          
                                                                                           
                                                                                           
    (Unaudited)                                 2017         2016          2017        2016
                                                                                           
    Net earnings/(loss)                       35,716       46,282        62,543     (6,128)
                                                                                           
    Adjusted for:                                                                          
                                                                                           
    Restructuring cost (a)                     2,477        1,264         3,304       2,125
                                                                                           
    Discounting of indirect taxes (b)              -      (6,508)             -     (6,508)
                                                                                           
    One-off legal settlements (c)              1,500            -         1,500           -
                                                                                           
    Prior year tax positions                       -            -             -      69,916
    recognised 1                                                                           
                                                                                           
    Tax impact of the above                  (1,193)        (379)       (1,441)       (638)
                                                                                           
    Adjusted net earnings                     38,500       40,659        65,906      58,767

    1 For the Six months ended 30 June 2016, US$69.9 million represents a provision
    raised for the implied impact of an adverse tax ruling made by the Tanzanian
    Court of Appeal with respect to historical tax assessments of Bulyanhulu. As
    reported in Q1 2016, the impact of the ruling was calculated for Bulyanhulu and
    extrapolated to North Mara and Tulawaka as well and covers results up to the
    end of 2015. On a site basis, US$35.1 million was raised for Bulyanhulu,
    US$30.4 million for North Mara and US$4.4 million for Tulawaka.

    Adjusted net earnings per share is a non-IFRS financial measure and is
    calculated by dividing adjusted net earnings by the weighted average number of
    Ordinary Shares in issue.

    Free cash flow is a non-IFRS measure and represents the change in cash and cash
    equivalents in a given period.

    Net cash is a non-IFRS measure. It is calculated by deducting total borrowings
    from cash and cash equivalents.

    Mining statistical information

    The following describes certain line items used in the Acacia Group's
    discussion of key performance indicators:

      * Open pit material mined - measures in tonnes the total amount of open pit
        ore and waste mined.
      * Underground ore tonnes hoisted - measures in tonnes the total amount of
        underground ore mined and hoisted.
      * Underground ore tonnes trammed - measures in tonnes the total amount of
        underground ore mined and trammed.
      * Total tonnes mined includes open pit material plus underground ore tonnes
        hoisted.
      * Strip ratio - measures the ratio of waste?to?ore for open pit material
        mined.
      * Ore milled - measures in tonnes the amount of ore material processed
        through the mill.
      * Head grade - measures the metal content of mined ore going into a mill for
        processing.
      * Milled recovery - measures the proportion of valuable metal physically
        recovered in the processing of ore. It is generally stated as a percentage
        of the metal recovered compared to the total metal originally present.

    Risk Review

    We have made a number of further developments in the identification and
    management of our risk profile over the course of H1 2017. Where appropriate,
    risk ratings have been reviewed against risk management controls and other
    mitigating factors. Our principal risks continue to fall within four broad
    categories: strategic risks, financial risks, external risks and operational
    risks. Whilst the overall makeup of our principal risks has not significantly
    changed from that published in the 2016 Annual Report, there have been changes
    in certain risk profiles. Developments such as the ban on the export of gold/
    copper concentrate and the recent enacting of Tanzanian legislation relating to
    the legal and regulatory framework governing the natural resources sector have
    resulted in increases to the impact rating of certain risks.

    As a result of our mid-year assessment, at this stage we believe it appropriate
    to include a new risk as a principal risk for the remainder of 2017 relating to
    cyber security. The likelihood of this risk has increased in the light of the
    increase in cybersecurity related incidents on a global level and the potential
    impact that a cyber security incident could have on the availability and
    integrity of our information technology infrastructure.

    As a result of the risk review outlined above, we view our principal risks for
    the remainder of 2017 as relating to the following:

    •               Political, legal and regulatory developments

    •               Security, trespass and vandalism

    •               Single country risk

    •               Implementation of enhanced operational systems

    •               Safety risks relating to mining operations

    •               Equipment effectiveness

    •               Environmental hazards and rehabilitation

    •               Continuity of power supply

    •               Significant changes to commodity prices

    •               Cyber security

    Further details as regards our Principal Risks and Uncertainties and risk
    assessments conducted in respect thereof will be provided as part of the 2017
    Annual Report and Accounts.

    Directors' Responsibility Statement

    The Directors confirm that, to the best of their knowledge, the condensed
    consolidated interim financial information has been prepared in accordance with
    IAS 34 as adopted by the European Union. The half-year management report
    includes a fair review of the information required by DTR 4.2.7R and DTR
    4.2.8R, namely:

      * an indication of important events that have occurred during the first six
        months of the financial year and their impact on the condensed consolidated
        interim financial information, and a description of the principal risks and
        uncertainties for the remaining six months of the financial year; and
      * material related-party transactions in the first six months of the
        financial year and any material changes in the related party transactions
        described in the last Annual Report.

    The Directors of Acacia Mining plc are listed in the Acacia Mining plc Annual
    Report for 31 December 2016, save for Mr Peter Tomsett and Ambassador Juma
    Mwapachu. A list of current Directors is maintained on the Acacia Mining plc
    Group website: www.acaciamining.com.

    On behalf of the Board

    Brad Gordon, Chief Executive Officer          Kelvin Dushnisky, Chairman                   

    Independent review report to Acacia Mining plc

    Report on the condensed consolidated interim financial information

    Our conclusion

    We have reviewed Acacia Mining plc's condensed consolidated interim financial
    information (the "interim financial statements") in the interim results of
    Acacia Mining plc for the 6 month period ended 30 June 2017. Based on our
    review, nothing has come to our attention that causes us to believe that the
    interim financial statements are not prepared, in all material respects, in
    accordance with International Accounting Standard 34, 'Interim Financial
    Reporting', as adopted by the European Union and the Disclosure Guidance and
    Transparency Rules sourcebook of the United Kingdom's Financial Conduct
    Authority.

    Emphasis of Matter - Impact of mineral concentrate export ban and legislative
    changes in Tanzania

    In forming our conclusion on the interim financial statements, which is not
    modified, we have considered the adequacy of the disclosures made in note 2 to
    the Interim financial statements and additional commentary within the Interim
    announcement concerning the ongoing mineral concentrate export ban and
    legislative changes in Tanzania. With regards to a potential negotiated
    settlement of the matter, it is too early to reliably estimate how a resolution
    could impact the Group's financial position, assets, liabilities and future
    cash flows. As a consequence, these conditions, along with the other matters
    explained in note 2 to the interim financial statements, indicate the existence
    of a material uncertainty which may cast significant doubt about the company's
    ability to continue as a going concern. The interim financial statements do not
    include the adjustments that would result if the company was unable to continue
    as a going concern.

    What we have reviewed

    The interim financial statements comprise:

      * the consolidated balance sheet as at 30 June 2017;
      * the consolidated income statement and consolidated statement of
        comprehensive income for the period then ended;
      * the consolidated statement of cash flows for the period then ended;
      * the consolidated statement of changes in equity for the period then ended;
        and
      * the explanatory notes to the interim financial statements.

    The interim financial statements included in the interim results have been
    prepared in accordance with International Accounting Standard 34, 'Interim
    Financial Reporting', as adopted by the European Union and the Disclosure
    Guidance and Transparency Rules sourcebook of the United Kingdom's Financial
    Conduct Authority.

    As disclosed in note 2 to the interim financial statements, the financial
    reporting framework that has been applied in the preparation of the full annual
    financial statements of the Group is applicable law and International Financial
    Reporting Standards (IFRSs) as adopted by the European Union.

    Responsibilities for the interim financial statements and the review

    Our responsibilities and those of the directors

    The interim results, including the interim financial statements, is the
    responsibility of, and has been approved by, the directors. The directors are
    responsible for preparing the interim results in accordance with the Disclosure
    Guidance and Transparency Rules sourcebook of the United Kingdom's Financial
    Conduct Authority.

    Our responsibility is to express a conclusion on the interim financial
    statements in the interim results based on our review. This report, including
    the conclusion, has been prepared for and only for the company for the purpose
    of complying with the Disclosure Guidance and Transparency Rules sourcebook of
    the United Kingdom's Financial Conduct Authority and for no other purpose.  We
    do not, in giving this conclusion, accept or assume responsibility for any
    other purpose or to any other person to whom this report is shown or into whose
    hands it may come save where expressly agreed by our prior consent in writing.

    What a review of interim financial statements involves

    We conducted our review in accordance with International Standard on Review
    Engagements (UK and Ireland) 2410, 'Review of Interim Financial Information
    Performed by the Independent Auditor of the Entity' issued by the Auditing
    Practices Board for use in the United Kingdom. A review of interim financial
    information consists of making enquiries, primarily of persons responsible for
    financial and accounting matters, and applying analytical and other review
    procedures.

    A review is substantially less in scope than an audit conducted in accordance
    with International Standards on Auditing (UK) and, consequently, does not
    enable us to obtain assurance that we would become aware of all significant
    matters that might be identified in an audit. Accordingly, we do not express an
    audit opinion.

    We have read the other information contained in the interim results and
    considered whether it contains any apparent misstatements or material
    inconsistencies with the information in the interim financial statements.

    PricewaterhouseCoopers LLP

    Chartered Accountants

    London

    21 July 2017

     a. The maintenance and integrity of the Acacia Mining plc website is the
        responsibility of the directors; the work carried out by the auditors does
        not involve consideration of these matters and, accordingly, the auditors
        accept no responsibility for any changes that may have occurred to the
        interim financial statements since they were initially presented on the
        website.
     b. Legislation in the United Kingdom governing the preparation and
        dissemination of financial statements may differ from legislation in other
        jurisdictions.

    Condensed Financial Information

    Consolidated income statement

                                                     For the six months ended  For the year 
                                                             30 June             ended 31   
                                                                                 December   
                                                                                            
                                                     (Unaudited) (Unaudited)    (Audited)   
                                                                                            
    (US$'000)                                  Notes        2017         2016           2016
                                                                                            
    Revenue                                              391,664      504,947      1,053,532
                                                                                            
    Cost of sales                                      (243,967)    (355,439)      (727,080)
                                                                                            
    Gross profit                                         147,697      149,508        326,452
                                                                                            
    Corporate administration                            (12,520)      (9,771)       (21,895)
                                                                                            
    Share-based payments                                   7,785     (19,635)       (29,929)
                                                                                            
    Exploration and evaluation costs                    (16,150)     (11,150)       (24,020)
                                                                                            
    Corporate social responsibility expenses             (3,739)      (4,614)       (10,665)
                                                                                            
    Other (charges)/income                       7      (19,617)        2,168         11,649
                                                                                            
    Profit/ (loss) before net finance expense            103,456      106,506        251,592
    and taxation                                                                            
                                                                                            
    Finance income                               8         1,543          490          1,512
                                                                                            
    Finance expense                              8       (5,454)      (5,380)       (11,047)
                                                                                            
    Profit/ (loss) before taxation                        99,545      101,616        242,057
                                                                                            
    Tax expense                                  9      (37,002)    (107,744)      (147,113)
                                                                                            
    Net (loss)/ profit for the period                     62,543      (6,128)         94,944
                                                                                            
    (Loss)/ earnings per share (cents):                                                     
                                                                                            
    Basic (loss)/ earnings per share (cents)    10          15.3        (1.5)           23.2
                                                                                            
    Diluted (loss)/ earnings per share (cents)  10          15.2        (1.5)           23.1

    The notes on pages 41 to 58 are an integral part of this financial information.

    Consolidated statement of comprehensive income

                                                     For the six months ended   For the year
                                                             30 June                ended 31
                                                                                    December
                                                                                            
                                                     (Unaudited)   (Unaudited)     (Audited)
                                                                                            
    (US$'000)                                               2017          2016          2016
                                                                                            
    Net (loss)/ profit for the period                     62,543       (6,128)        94,944
                                                                                            
    Other comprehensive income:                                                             
                                                                                            
    Items that may be subsequently reclassified                                             
    to profit or loss:                                                                      
                                                                                            
    Changes in fair value of cash flow hedges                 52       (1,226)             7
                                                                                            
    Total comprehensive (loss)/ income for the            62,595       (7,354)        94,951
    period                                                                                  
                                                                                            

    The notes on pages 41 to 58 are an integral part of this financial information.

    Consolidated balance sheet                                        As at       As at      As at
                                                                    30 June     30 June         31
                                                                (Unaudited) (Unaudited)   December
                                                                                         (Audited)
                                                                                                  
    (US$'000)                                            Notes         2017        2016       2016
                                                                                                  
    ASSETS                                                                                        
                                                                                                  
    Non-current assets                                                                            
                                                                                                  
    Goodwill and intangible assets                                  216,190     211,190    216,190
                                                                                                  
    Property, plant and equipment                         12      1,465,309   1,414,194  1,443,176
                                                                                                  
    Deferred tax assets                                               3,208      11,416      8,431
                                                                                                  
    Non-current portion of inventory                      14        115,775      87,050     98,936
                                                                                                  
    Derivative financial instruments                      13            770         129        821
                                                                                                  
    Other assets                                                     58,474     118,197     63,297
                                                                                                  
                                                                  1,859,726   1,842,176  1,830,851
                                                                                                  
    Current assets                                                                                
                                                                                                  
    Inventories                                           14        280,692     195,657    184,313
                                                                                                  
    Trade and other receivables                                      12,039      20,119     18,830
                                                                                                  
    Derivative financial instruments                      13            601           9      1,343
                                                                                                  
    Other current assets                                  15        190,868      86,230    149,518
                                                                                                  
    Cash and cash equivalents                                       175,886     284,357    317,791
                                                                                                  
                                                                    660,086     586,372    671,795
                                                                                                  
    Total assets                                                  2,519,812   2,428,548  2,502,646
                                                                                                  
    EQUITY AND LIABILITIES                                                                        
                                                                                                  
    Share capital and share premium                                 929,199     929,199    929,199
                                                                                                  
    Other reserves                                                  961,912     839,505    933,696
                                                                                                  
    Total owners' equity                                          1,891,111   1,768,704  1,862,895
                                                                                                  
    Total equity                                                  1,891,111   1,768,704  1,862,895
                                                                                                  
                                                                                                  
    Non-current liabilities                                                                       
                                                                                                  
    Borrowings                                            16         56,800      85,200     71,000
                                                                                                  
    Deferred tax liabilities                                        148,341     138,751    148,390
                                                                                                  
    Derivative financial instruments                      13          1,068         588         30
                                                                                                  
    Provisions                                                      147,314     147,676    145,722
                                                                                                  
    Other non-current liabilities                                     4,778      10,063     15,699
                                                                                                  
                                                                    358,301     382,278    380,841
                                                                                                  
    Current liabilities                                                                           
                                                                                                  
    Trade and other payables                                        228,942     211,852    222,543
                                                                                                  
    Borrowings                                            16         28,400      28,400     28,400
                                                                                                  
    Derivative financial instruments                      13          1,114      10,973        584
                                                                                                  
    Provisions                                                        9,336       1,566      7,235
                                                                                                  
    Other current liabilities                                         2,608      24,775        148
                                                                                                  
                                                                    270,400     277,566    258,910
                                                                                                  
    Total liabilities                                               628,701     659,844    639,751
                                                                                                  
    Total equity and liabilities                                  2,519,812   2,428,548  2,502,646

    The notes on pages 41 to 58 are an integral part of this financial information.

    Consolidated statement of changes in equity

                                           Notes   Share     Share          Other   Cash flow
                                                 capital   premium  distributable     hedging
                                                                          reserve     reserve
                                                                                             
    (US$'000)                                                                                
                                                                                             
    Balance at 31 December 2015                   62,097   867,102      1,368,713         552
    (Audited)                                                                                
                                                                                             
    Total comprehensive loss for the                   -         -              -     (1,226)
    period                                                                                   
                                                                                             
    Dividends to equity holders of the                 -         -              -           -
    Company                                                                                  
                                                                                             
    Share option grants                                -         -              -           -
                                                                                             
    Balance at 30 June 2016 (Unaudited)           62,097   867,102      1,368,713       (674)
                                                                                             
    Total comprehensive income for the                 -         -              -       1,233
    period                                                                                   
                                                                                             
    Share option grants                                -         -              -           -
                                                                                             
    Dividends to equity holders of the                 -         -              -           -
    Company                                                                                  
                                                                                             
    Balance at 31 December 2016                   62,097   867,102      1,368,713         559
    (Audited)                                                                                
                                                                                             
    Total comprehensive loss for the                   -         -              -          52
    period                                                                                   
                                                                                             
    Dividends to equity holders of the        11       -         -              -           -
    Company                                                                                  
                                                                                             
    Share option grants                                                                      
                                                                                             
    Balance at 30 June 2017 (Unaudited)           62,097   867,102      1,368,713         611

       

                                          Share   Accumulated     Total  Total non-     Total
                                         option        losses   owners' controlling    equity
                                        reserve                  equity   interests          
                                                                                             
    (US$'000)                                                                                
                                                                                             
    Balance at 31 December 2015           3,876     (514,841) 1,787,499           - 1,787,499
    (Audited)                                                                                
                                                                                             
    Total comprehensive loss for the          -       (6,128)   (7,354)           -   (7,354)
    period                                                                                   
                                                                                             
    Dividends to equity holders of the        -      (11,490)  (11,490)           -  (11,490)
    Company                                                                                  
                                                                                             
    Share option grants                      49             -        49           -        49
                                                                                             
    Balance at 30 June 2016               3,925     (532,459) 1,768,704           - 1,768,704
    (Unaudited)                                                                              
                                                                                             
    Total comprehensive income for the        -       101,072   102,305           -   102,305
    period                                                                                   
                                                                                             
    Share option grants                      28             -        28           -        28
                                                                                             
    Dividends to equity holders of the        -       (8,142)   (8,142)           -   (8,142)
    Company                                                                                  
                                                                                             
    Balance at 31 December 2016           3,953     (439,529) 1,862,895           - 1,862,895
    (Audited)                                                                                
                                                                                             
    Total comprehensive loss for the          -        62,543    62,595           -    62,595
    period                                                                                   
                                                                                             
    Dividends to equity holders of the        -      (34,385)  (34,385)           -  (34,385)
    Company                                                                                  
                                                                                             
    Share option grants                       6                       6                     6
                                                                                             
    Balance at 30 June 2017               3,959     (411,371) 1,891,111           - 1,891,111
    (Unaudited)                                                                              

    The notes on pages 41 to 58 are an integral part of this financial information.

    Consolidated statement of cash flows

                                                              For the six months        For the
                                                                     ended           year ended
                                                                    30 June         31 December
                                                                                               
    (US$'000)                                         Notes (Unaudited) (Unaudited)   (Audited)
                                                                   2017        2016        2016
                                                                                               
    Cash flows from operating activities                                                       
                                                                                               
    Net (loss)/ profit for the period                            62,543     (6,128)      94,944
                                                                                               
    Adjustments for:                                                                           
                                                                                               
      Tax expense                                                37,002     107,744     147,113
                                                                                               
      Depreciation and amortisation                              69,722      79,367     156,301
                                                                                               
      Finance items                                               3,911       4,890       9,535
                                                                                               
      Sale of mineral royalty                                   (1,753)           -           -
                                                                                               
      Loss/ (profit) on disposal of property, plant                   -         136       (289)
    and equipment                                                                              
                                                                                               
    Working capital adjustments                          17   (159,697)    (16,306)    (58,497)
                                                                                               
    Other non-cash items                                 17     (8,209)     (8,952)    (23,850)
                                                                                               
    Cash generated from operations before interest                3,519     160,751     325,257
    and tax                                                                                    
                                                                                               
    Finance income                                                1,543         490       1,512
                                                                                               
    Finance expenses                                            (3,747)     (4,145)     (8,793)
                                                                                               
    Net cash generated by operating activities                    1,315     157,096     317,976
                                                                                               
    Cash flows used in investing activities                                                    
                                                                                               
    Purchase of property, plant and equipment                 (100,064)    (82,606)   (193,643)
                                                                                               
    Movement in other assets                                      3,746       2,529       6,952
                                                                                               
    Proceeds from sale of mineral royalty                         1,753           -           -
                                                                                               
    Acquired mineral interest                                         -           -     (5,000)
                                                                                               
    Other investing activities                                    (221)       (195)       6,528
                                                                                               
    Net cash used in investing activities                      (94,786)    (80,272)   (185,163)
                                                                                               
    Cash flows used in financing activities                                                    
                                                                                               
    Loans paid                                                 (14,200)    (14,200)    (28,400)
                                                                                               
    Dividends paid                                             (34,385)    (11,490)    (19,632)
                                                                                               
    Net cash used in financing activities                      (48,585)    (25,690)    (48,032)
                                                                                               
    Net increase/ (decrease) in cash and cash                 (142,056)      51,134      84,781
    equivalents                                                                                
                                                                                               
    Net foreign exchange difference                                 151        (45)       (258)
                                                                                               
    Cash and cash equivalents at the beginning of the           317,791     233,268     233,268
    period                                                                                     
                                                                                               
    Cash and cash equivalents at the end of the                 175,886     284,357     317,791
    period                                                                                     
                                                                                               

    The notes on pages 41 to 58 are an integral part of this financial information.

    Notes to the condensed financial information

    1. General Information

    Acacia Mining plc, formerly African Barrick Gold plc (the "Company", "Acacia"
    or collectively with its subsidiaries the "Group") was incorporated on 12
    January 2010 and re-registered as a public limited company on 12 March 2010
    under the Companies Act 2006. It is registered in England and Wales with
    registered number 7123187.

    On 24 March 2010 the Company's shares were admitted to the Official List of the
    United Kingdom Listing Authority ("UKLA") and to trading on the Main Market of
    the London Stock Exchange, hereafter referred to as the Initial Public Offering
    ("IPO"). The address of its registered office is No.1 Cavendish Place, London,
    W1G 0QF.

    Barrick Gold Corporation ("Barrick") currently owns approximately 63.9% of the
    shares of the Company and is the ultimate parent and controlling party of the
    Group. The financial statements of Barrick can be obtained from
    www.barrick.com.

    The condensed consolidated interim financial information for the six months
    ended 30 June 2017 was approved for issue by the Board of Directors of the
    Company on 21 July 2017. Statutory accounts for the year ended 31 December 2016
    were approved by the Board of Directors on 7 March 2017 and delivered to the
    Registrar of Companies. The report of the auditors' on those accounts was
    unqualified, did not contain an emphasis of matter paragraph and did not
    contain any statement under section 498 of the Companies Act 2006. The
    condensed consolidated interim financial information has been reviewed, not
    audited. The condensed consolidated interim financial information does not
    comprise statutory accounts within the meaning of section 434 of the Companies
    Act 2008.

    The Group's primary business is the mining, processing and sale of gold. The
    Group has three operating mines located in Tanzania. The Group also has a
    portfolio of exploration projects located across Africa.

    2. Basis of Preparation of the condensed interim financial information

    The condensed consolidated interim financial information for the six months
    ended 30 June 2017 has been prepared in accordance with the Disclosure and
    Transparency Rules of the Financial Conduct Authority and with IAS 34, 'Interim
    Financial Reporting' as adopted by the European Union. The condensed
    consolidated interim financial information should be read in conjunction with
    the annual financial statements for the year ended 31 December 2016, which have
    been prepared in accordance with IFRS as adopted by the European Union. The
    condensed consolidated interim financial information has been prepared under
    the historical cost basis, as modified by the revaluation of financial assets
    and financial liabilities (including derivative instruments) at fair value
    through profit or loss. The financial information is presented in US dollars
    (US$) and all monetary results are rounded to the nearest thousand (US$'000)
    except when otherwise indicated.

    Acacia Group's business activities, together with factors likely to affect its
    future development, performance and position, are set out in the operational
    and financial review sections of this interim results release. The financial
    position of the Acacia Group, its cash flows, liquidity position and borrowing
    facilities are described in the operating and financial review sections of this
    interim results release.

    At 30 June 2017, the Group had cash and cash equivalents of US$176 million with
    a further US$150 million available under the undrawn revolving credit facility
    which remains in place until November 2019. Total borrowings at the end of the
    period amounted to US$85 million, of which US$28 million will be paid in the
    next 12 months. Included in other current assets are amounts due to the Group
    relating to indirect taxes of US$165 million which are expected to be received
    or recovered within 12 months. The refunds remain dependent on processing and
    payments of refunds by the Government of Tanzania. Furthermore, included in
    working capital is finished gold contained in concentrate of approximately
    127,000 ounces, approximately 8.3 million pounds of copper contained in
    concentrate and approximately 107,000 ounces of silver contained in
    concentrate. These contained metals are in a condition to be sold, and will
    deliver revenue, net of government royalties, of approximately US$163 million.

    As set out in the other developments section on pages 2 to 5 and further
    explained in the operating and financial review sections, the current operating
    environment in Tanzania is challenging and there are several uncertainties in
    our operating environment. In March 2017, the Government of Tanzania issued a
    ban on the export of all gold/ copper concentrate and this ban remains in
    place. This has resulted in the stockpiled concentrate material referred to
    above. Currently, it is not clear how long this ban will remain in place. In
    addition, and as set out in the same paragraphs in the other developments
    section on pages 2 to 5 the Government of Tanzania has also announced some
    significant changes to the laws impacting the extractive industry in late June
    2017, which have subsequently been passed in early July 2017.

    The Directors are of the opinion that these developments and current
    circumstances represent ongoing challenges in terms of cash flow generation and
    continued uninterrupted operation of the Bulyanhulu and Buzwagi mines. Our
    third mine, North Mara, continues to perform well and to generate free cash
    flow.

    As explained in the other developments section, the Group has served notices of
    Arbitration relating to its Bulyanhulu and Buzwagi mines under their respective
    Mineral Development Agreements. In addition, we also believe that our Mineral
    Development Agreements protect us from the legislative changes proposed.
    Notwithstanding these developments, we continue to believe that a negotiated
    settlement of these differences with the Tanzanian Government remains in the
    best interests of all parties and we look forward to discussions commencing in
    the near future. As negotiations are yet to commence the impact of a settlement
    on the Group's financial position, assets, liabilities and future cash flows is
    uncertain. At the same time, management has instituted measures to limit
    unnecessary expenditure and preserve cash, and are considering a range of
    options to limit the impact of the above factors; amongst others to consider
    halting operations at the affected mines should it be needed.

    In assessing the Acacia Group's going concern status the Directors have taken
    into account the impact of the ban on ongoing operations as well as the
    following factors and assumptions; the significant current cash position,  the
    latest mine plans and a range of scenarios around the various options under
    these circumstances, including the impact of an extended concentrate export ban
    or the impact of halting the affected mines for a period of time, the current
    gold and copper prices and market expectations for the same in the medium term,
    and Acacia Group's capital expenditure and financing plans. In addition the
    Directors have assumed that the Group will repay its borrowing obligations in
    accordance with the current terms of its agreement, and that undrawn facilities
    continue to be available.  After making appropriate enquiries and considering
    the uncertainties described above, the Directors consider that it is
    appropriate to adopt the going concern basis in preparing the condensed
    consolidated interim financial information however have concluded that the
    combination of these circumstances represents a material uncertainty that may
    cast significant doubt on the Group's ability to continue as a going concern
    should the assumptions referred to above prove not to be correct.

    3. Accounting Policies

    The accounting policies adopted are consistent with those used in the Acacia
    Mining plc annual financial statements for the year ended 31 December 2016.
    There are no new standards, interpretations or amendments to standards issued
    and effective for the period which materially impacted on the Group. The
    following exchange rates to the US dollar have been applied:

                              As at     Average     As at    Average     As at     Average  
                             30 June   six months  30 June  six months     31     year ended
                               2016      ended      2016      ended     December      31    
                                        30 June              30 June      2016     December 
                                          2016                 2016                  2016   
                                                                                            
    South African rand        13.09      13.20      14.78     15.40      13.70      14.66   
    (US$:ZAR)                                                                               
                                                                                            
    Tanzanian shilling        2,230      2,224      2,179     2,179      2,173      2,177   
    (US$:TZS)                                                                               
                                                                                            
    Australian dollars         1.30       1.33      1.35       1.36       1.38       1.34   
    (US$:AUD)                                                                               
                                                                                            
    UK pound (US$:GBP)         0.59       0.79      0.76       0.70       0.81       0.74   

    4. Estimates

    The preparation of interim financial statements requires management to make
    judgements, estimates and assumptions that affect the application of accounting
    policies and the reported amounts of assets and liabilities, income and
    expense. Actual results may differ from these estimates. In preparing these
    condensed consolidated interim financial statements, the significant judgements
    made by management in applying the Group's accounting policies and the key
    sources of estimation uncertainty were the same as those that applied to the
    consolidated financial statements for the year ended 31 December 2016.

    5. Segment Reporting

    The Group has only one primary product produced in a single geographic
    location, being gold produced in Tanzania. In addition the Group produces
    copper and silver as a co-product. Reportable operating segments are based on
    the internal reports provided to the Chief Operating Decision Maker ("CODM") to
    evaluate segment performance, decide how to allocate resources and make other
    operating decisions. After applying the aggregation criteria and quantitative
    thresholds contained in IFRS 8, the Group's reportable operating segments were
    determined to be: North Mara gold mine; Bulyanhulu gold mine; Buzwagi gold
    mine; a separate Corporate and Exploration segment, which primarily consists of
    costs related to other charges and corporate social responsibility expenses.

    Segment results and carrying values include items directly attributable to the
    segment as well as those that can be allocated on a reasonable basis. Segment
    carrying values are disclosed and calculated as shareholders equity after
    adding back debt and intercompany liabilities, and subtracting cash and
    intercompany assets. Capital expenditures comprise of additions to property,
    plant and equipment. The Group has also included segment cash costs and all-in
    sustaining cost per ounce sold.

    Segment information for the reportable operating segments of the Group for the
    periods ended 30 June 2017, 30 June 2016 and 31 December 2016 is set out below.

                                              For the six months ended 30 June 2017          
                                                                                             
    (Unaudited)                     North Mara Bulyanhulu   Buzwagi   Other      Total       
    (US$'000,except per ounce                                                                
    amounts)                                                                                 
                                                                                             
    Gold revenue                       220,217     100,023    65,619        -      385,859   
                                                                                             
    Co-product revenue                     653       2,760     2,392        -        5,805   
                                                                                             
    Total segment revenue              220,870     102,783    68,011        -      391,664   
                                                                                             
    Segment cash operating cost1      (79,251)    (67,344)  (39,413)        0    (186,008)   
                                                                                             
    Corporate administration and       (4,181)     (2,937)   (2,559) (18,992)     (28,669)   
    exploration                                                                              
                                                                                             
    Other charges and corporate        (3,843)       (902)   (6,099)  (4,728)     (15,572)   
    social responsibility expenses                                                           
                                                                                             
    EBITDA2                            133,595      31,600    19,940 (23,720)      161,415   
                                                                                             
    Depreciation and amortisation4    (29,009)    (26,940)   (1,777)    (233)     (57,959)   
                                                                                             
    EBIT2                              104,586       4,660    18,163 (23,953)      103,456   
                                                                                             
    Finance income                                                                   1,543   
                                                                                             
    Finance expense                                                                (5,454)   
                                                                                             
    Profit before taxation                                                          99,545   
                                                                                             
    Tax expense                                                                   (37,002)   
                                                                                             
    Net profit for the period                                                       62,543   
                                                                                             
    Capital expenditure:                                                                     
                                                                                             
    Sustaining                          10,930       8,599       865      957       21,351   
                                                                                             
    Expansionary                         4,489         982         -       51        5,522   
                                                                                             
    Capitalised development             33,282      31,054         -        -       64,336   
                                                                                             
                                        48,701      40,635       865    1,008       91,209   
                                                                                             
    Non-cash capital expenditure                                                             
    adjustments                                                                              
                                                                                             
    Reclamation asset adjustment          (56)         191       (1)        -          134   
                                                                                             
    Other non-cash capital                   -           -         -      (1)          (1)   
    expenditure                                                                              
                                                                                             
    Total capital expenditure           48,645      40,826       864    1,007       91,342   
                                                                                             
    Segmental cash operating cost       79,251      67,344    39,413        -      186,008   
                                                                                             
    Deduct: co-product revenue           (654)     (2,760)   (2,392)        -      (5,806)   
                                                                                             
    Total cash costs                    78,597      64,584    37,021        -      180,202   
                                                                                             
    Sold ounces                        178,130      81,214    53,094        -      312,438   
                                                                                             
    Cash cost per ounce sold2              441         795       697                   577   
                                                                                             
    Corporate administration                23          36        48        9           40   
    charges                                                                                  
                                                                                             
    Share-based payments                   (2)         (4)       (6)     (22)         (25)   
                                                                                             
    Rehabilitation - accretion and          10          16         7        -           11   
    depreciation                                                                             
                                                                                             
    Corporate social responsibility          8           8         7        4           12   
    expenses                                                                                 
                                                                                             
    Capitalised stripping/ UG              187         382         -        -          206   
    development                                                                              
                                                                                             
    Sustaining capital expenditure          69         107        17        3           72   
                                                                                             
    All-in sustaining cost per             736       1,340       770      (6)          893   
    ounce sold2                                                                              
                                                                                             
    Segment carrying value3            294,744   1,281,208   142,280   97,233    1,815,465   

       

                                              For the six months ended 30 June 2016          
                                                                                             
    (Unaudited)                     North Mara Bulyanhulu   Buzwagi   Other      Total       
    (US$'000,except per ounce                                                                
    amounts)                                                                                 
                                                                                             
    Gold revenue                       203,788     182,872    97,954        -      484,614   
                                                                                             
    Co-product revenue                     366       8,188    11,779        -       20,333   
                                                                                             
    Total segment revenue              204,154     191,060   109,733        -      504,947   
                                                                                             
    Segment cash operating cost1      (72,895)   (107,842)  (96,326)        -    (277,063)   
                                                                                             
    Corporate administration and       (5,443)     (6,273)   (2,847) (25,993)     (40,556)   
    exploration                                                                              
                                                                                             
    Other charges and corporate          3,158     (2,651)   (1,725)  (1,228)      (2,446)   
    social responsibility expenses                                                           
                                                                                             
    EBITDA2                            128,974      74,294     8,835 (27,221)      184,882   
                                                                                             
    Depreciation and amortisation4    (29,346)    (41,107)   (6,869)  (1,054)     (78,376)   
                                                                                             
    EBIT2                               99,628      33,187     1,966 (28,275)      106,506   
                                                                                             
    Finance income                                                                     490   
                                                                                             
    Finance expense                                                                (5,380)   
                                                                                             
    Profit before taxation                                                         101,616   
                                                                                             
    Tax expense                                                                  (107,744)   
                                                                                             
    Net loss for the period                                                        (6,128)   
                                                                                             
    Capital expenditure:                                                                     
                                                                                             
    Sustaining                           7,257      11,506     2,231      654       21,648   
                                                                                             
    Expansionary                           458         753         -        -        1,211   
                                                                                             
    Capitalised development             31,051      28,438         -        -       59,489   
                                                                                             
                                        38,766      40,697     2,231      654       82,348   
                                                                                             
    Non-cash capital expenditure                                                             
    adjustments                                                                              
                                                                                             
    Reclamation asset adjustment         6,252       9,937     3,007        -       19,196   
                                                                                             
    Total capital expenditure           45,018      50,634     5,238      654      101,544   
                                                                                             
    Segmental cash operating cost       72,895     107,842    96,326               277,063   
                                                                                             
    Deduct: co-product revenue           (366)     (8,188)  (11,779)              (20,333)   
                                                                                             
    Total cash costs                    72,529      99,654    84,547               256,730   
                                                                                             
    Sold ounces                        169,840     150,719    80,404               400,963   
                                                                                             
    Cash cost per ounce sold2              427         661     1,052                   640   
                                                                                             
    Corporate administration                24          21        25                    24   
    charges                                                                                  
                                                                                             
    Share-based payments                     7          11        11                    49   
                                                                                             
    Rehabilitation - accretion and           9           7         3                     7   
    depreciation                                                                             
                                                                                             
    Corporate social responsibility         11           5         7                    12   
    expenses                                                                                 
                                                                                             
    Capitalised stripping/ UG              183         189         -                   148   
    development                                                                              
                                                                                             
    Sustaining capital expenditure          59          76        26                    61   
                                                                                             
    All-in sustaining cost per             720         970     1,124                   941   
    ounce sold2                                                                              
                                                                                             
    Segment carrying value3            262,260   1,214,729    71,676   62,764    1,611,429   

       

                                               For the year ended 31 December 2016           
                                                                                             
    (Audited)                       North Mara Bulyanhulu   Buzwagi   Other      Total       
    (US$'000,except per ounce                                                                
    amounts)                                                                                 
                                                                                             
    Gold revenue                       468,340     345,481   200,648        -    1,014,469   
                                                                                             
    Co-product revenue                     953      15,447    22,663        -       39,063   
                                                                                             
    Total segment revenue              469,293     360,928   223,311        -    1,053,532   
                                                                                             
    Segment cash operating cost1     (155,344)   (217,226) (188,896)        -    (561,466)   
                                                                                             
    Corporate administration and       (8,251)     (9,507)   (4,176) (23,191)     (45,915)   
    exploration                                                                              
                                                                                             
    Other charges and corporate        (2,918)     (3,960)   (3,011) (20,874)     (30,763)   
    social responsibility expenses                                                           
                                                                                             
    EBITDA2                            302,780     130,235    27,228 (44,855)      415,388   
                                                                                             
    Impairment charges                       -           -         -        -            -   
                                                                                             
    Depreciation and amortisation4    (67,472)    (82,022)  (12,668)  (1,634)    (163,796)   
                                                                                             
    EBIT2                              235,308      48,213    14,560 (46,489)      251,592   
                                                                                             
    Finance income                                                                   1,512   
                                                                                             
    Finance expense                                                               (11,047)   
                                                                                             
    Loss before taxation                                                           242,057   
                                                                                             
    Tax expense                                                                  (147,113)   
                                                                                             
    Net profit for the year                                                         94,944   
                                                                                             
    Capital expenditure:                                                                     
                                                                                             
    Sustaining                          23,558      20,231     3,582    1,416       48,787   
                                                                                             
    Expansionary                         2,399       1,262         -        -        3,661   
                                                                                             
    Capitalised development             75,609      63,082         -        -      138,691   
                                                                                             
                                       101,566      84,575     3,582    1,416      191,139   
                                                                                             
    Non-cash capital expenditure                                                             
    adjustments                                                                              
                                                                                             
    Reclamation asset adjustment         6,703      10,728     4,524        -       21,955   
                                                                                             
    Total capital expenditure          108,269      95,303     8,106    1,416      213,094   
                                                                                             
    Segmental cash operating cost      155,344     217,226   188,896               561,466   
                                                                                             
    Deduct: co-product revenue           (953)    (15,447)  (22,663)              (39,063)   
                                                                                             
    Total cash costs                   154,391     201,779   166,233               522,403   
                                                                                             
    Sold ounces                        376,255     279,286   161,202               816,743   
                                                                                             
    Cash cost per ounce sold2              410         722     1,031                   640   
                                                                                             
    Corporate administration                21          21        26                    27   
    charges                                                                                  
                                                                                             
    Share-based payments                     2           2         3                    37   
                                                                                             
    Rehabilitation - accretion and           9           7         3                     7   
    depreciation                                                                             
                                                                                             
    Corporate social responsibility         15           6        10                    13   
    expenses                                                                                 
                                                                                             
    Capitalised stripping/ UG              201         226         -                   170   
    development                                                                              
                                                                                             
    Sustaining capital expenditure          75          74        22                    64   
                                                                                             
    All-in sustaining cost per             733       1,058     1,095                   958   
    ounce sold2                                                                              
                                                                                             
    Segment carrying value3            246,175   1,231,793    97,243   82,710    1,657,921   

    1   The CODM reviews cash operating costs for the three operating mine sites
    separately from corporate administration costs and exploration costs.
    Consequently, the Group has reported these costs in this manner.

    2   These are non-IFRS financial performance measures with no standard meaning
    under IFRS. Refer to 'Non IFRS measures' on page 28 for definitions.

    3   Segment carrying values are calculated as shareholders equity after adding
    back debt and intercompany liabilities, and subtracting cash and intercompany
    assets and include outside shareholders' interests.

    4   Depreciation and amortisation includes the depreciation component of the
    cost of inventory sold.

    6. Impairment Assessment

    In accordance with IAS 36 "Impairment of assets" and IAS 38 "Intangible Assets"
    a review for impairment of goodwill is undertaken annually, or at any time an
    indicator of impairment is considered to exist, and in accordance with IAS 16
    "Property, plant and equipment" a review for impairment of long-lived assets is
    undertaken at any time an indicator of impairment is considered to exist.

    As previously reported, and as discussed in the other developments and
    operating and finance reviews of this interim financial results release, the
    Government of Tanzania announced a ban on the export of gold/copper concentrate
    in March 2017. Subsequently, during the second quarter two Presidential
    Committees reported their findings following investigations into the technical
    and economic aspects of the historic exports of gold/copper concentrates.
    Acacia fully refutes the implausible findings of both committees which claim
    that Acacia and its predecessor companies have historically significantly
    under-declared the contents of exports of concentrate which has led to an
    under-declaration of taxes running into the tens of billions of dollars. Acacia
    re-iterates that it has declared everything of commercial value that it has
    produced since it started operating in Tanzania and has paid all appropriate
    royalties and taxes on all of the payable minerals that it has produced.
    Discussions to find a mutually beneficial solution to these issues are expected
    to start early in Q3 2017.

    The above has had a negative impact on the operating environment of Acacia and
    the three mines it operates in Tanzania. These changes, in combination with the
    ban imposed and proposed legislative changes have been identified by management
    as potential triggers for an impairment assessment.

    As a result of the above, a review for impairment of the affected cash
    generating units ("CGU") has been performed. The review compared the
    recoverable amount of assets for the CGU to the carrying value of the CGU's
    including goodwill. The recoverable amount of an asset is assessed by reference
    to the higher of value in use ("VIU"), being the net present value ("NPV") of
    future cash flows expected to be generated by the asset, and fair value less
    costs to dispose ("FVLCD"). The FVLCD of a CGU is based on an estimate of the
    amount that the Group may obtain in a sale transaction on an arm's length
    basis. There is no active market for the Group's CGU's. Consequently, FVLCD is
    derived using discounted cash flow techniques (NPV of expected future cash
    flows of a CGU), which incorporate market participant assumptions. Cost to
    dispose is based on management's best estimates of future selling costs at the
    time of calculating FVLCD. Costs attributable to the disposal of a CGU are not
    considered significant. The expected future cash flows utilised in the NPV
    model are derived from estimates of projected future revenues, future cash
    costs of production and capital expenditures contained in the life-of-mine
    ("LOM") plan for each CGU. The Group's LOM plans reflect proven and probable
    reserves, assume limited resource conversion, and are based on detailed
    research, analysis and modelling to optimise the internal rate of return for
    each CGU.

    The discount rate applied to calculate the present value is based upon the real
    weighted average cost of capital applicable to the CGU. The discount rate
    reflects equity risk premiums over the risk-free rate, the impact of the
    remaining economic life of the CGU and the risks associated with the relevant
    cash flows based on the country in which the CGU is located. These risk
    adjustments are based on observed equity risk premiums, historical country risk
    premiums and average credit default swap spreads for the period.

    The key economic assumptions used in the reviews during 2017 and 2016 were:

                                       For the 6 months              For the year ended
                                                  ended                     31 December
                                                30 June                                
                                                                                       
                                                   2017                            2016
                                                                                       
    Gold price per ounce (2017)                US$1,200                        US$1,200
                                                                                       
    Gold price per ounce(Long                  US$1,200                        US$1,200
    term)                                                                              
                                                                                       
    Copper price per pound                      US$2.50                         US$2.25
                                                                                       
    South African Rand (US$:ZAR)                     14                              14
                                                                                       
    Tanzanian Shilling (US$:TZS)                  2,100                           2,150
                                                                                       
    Long-term oil price per                       US$60                           US$60
    barrel                                                                             
                                                                                       
    Discount rate                                    5%                              5%
                                                                                       
    NPV multiples                                     1                               1

       



    Our assessment took into account the impact of the current ban on the export of
    gold/ copper concentrate as well as the increased royalty rate and export
    clearing fees announced in June 2017 on cash flows generated by each affected
    CGU.

    As a result of the impairment assessment performed, no impairment charge was
    recorded for the six months ended 30 June 2017.

    For purposes of testing for impairment of long-lived assets, we have assessed
    whether a reasonably possible change in any of the key assumptions used to
    estimate the recoverable value for CGUs would result in an impairment charge.

    Management's view is that the recoverable values are most sensitive to changes
    in the assumptions around gold prices and discount rates. As a result,
    sensitivity calculations were performed for these for each of the CGUs. The
    sensitivity analysis is based on a decrease in the long term gold price of
    US$100 per ounce, and an increase in the discount rate of 1%.

    Neither of the reasonably possible changes set out above would result in an
    impairment. This sensitivity analysis also does not take into account any of
    management's mitigation factors should these changes occur.

    Our review assumed that negotiations around resolving the current in-country
    matters are resolved. Should this not be the case, a carrying value assessment
    review will be performed again, and this might or might not result in the
    recognition of impairment losses.

    7. Other Charges

                                                        For the six months ended 30     For the
                                                                               June  year ended
                                                                                    31 December
                                                                                               
                                                          (Unaudited)   (Unaudited)   (Audited)
                                                                                               
    (US$'000)                                                    2017          2016        2016
                                                                                               
    Other expenses                                                                             
                                                                                               
     Operational Review costs (including                        3,304         2,125       7,689
    restructuring cost)                                                                        
                                                                                               
     Foreign exchange losses                                    4,583             -           -
                                                                                               
     Disallowed indirect taxes                                    615           938       1,447
                                                                                               
     Unrealised non-hedge derivative losses                     2,431             -           -
                                                                                               
     Legal costs                                                4,601           667       2,641
                                                                                               
     One off legal settlements                                  1,500             -           -
                                                                                               
     Government levies and charges                                535             -           -
                                                                                               
     Loss on disposal of property, plant and                        -           136           -
    equipment                                                                                  
                                                                                               
     Other                                                      3,801         2,782       4,259
                                                                                               
     Total                                                     21,370         6,648      16,036
                                                                                               
    Other income                                                                               
                                                                                               
     Discounting of indirect tax receivables                        -       (6,508)     (9,719)
                                                                                               
     Profit on disposal of property, plant and                      -             -       (289)
    equipment                                                                                  
                                                                                               
     Unrealised non-hedge derivative gains                          -       (1,352)    (13,031)
                                                                                               
     Insurance proceeds                                             -             -     (3,455)
                                                                                               
     Foreign exchange gains                                         -         (956)     (1,137)
                                                                                               
    Sale of mineral royalty                                   (1,753)             -           -
                                                                                               
     Other                                                          -             -        (54)
                                                                                               
     Total                                                    (1,753)       (8,816)    (27,685)
                                                                                               
    Total other income/(charges)                               19,617       (2,168)    (11,649)

    8. Finance Income and Expenses

    a)Finance income

                                                        For the six months ended 30     For the
                                                                               June  year ended
                                                                                    31 December
                                                                                               
                                                          (Unaudited)   (Unaudited)   (Audited)
                                                                                               
    (US$'000)                                                    2017          2016        2016
                                                                                               
    Interest on time deposits                                   1,443           403       1,236
                                                                                               
    Other                                                         100            87         276
                                                                                               
    Total                                                       1,543           490       1,512

    b) Finance expense

                                                        For the six months ended 30     For the
                                                                               June  year ended
                                                                                    31 December
                                                                                               
                                                          (Unaudited)   (Unaudited)   (Audited)
                                                                                               
    (US$'000)                                                    2017          2016        2016
                                                                                               
    Unwinding of discount1                                      1,708         1,235       2,254
                                                                                               
    Revolving credit facility charges2                          1,151         1,087       2,279
                                                                                               
    Interest on CIL facility                                    1,573         1,896       3,956
                                                                                               
    Interest on finance leases                                    200           199           -
                                                                                               
    Bank charges                                                  319           604         701
                                                                                               
    Other                                                         503           359       1,857
                                                                                               
    Total                                                       5,454         5,380      11,047

     1. The unwinding of discount is calculated on the environmental rehabilitation
        provision.
     2. Included in credit facility charges are the amortisation of the fees
        related to the revolving credit facility as well as the monthly interest
        and facility fees.

    9. Tax Expense

                                                      For the six months ended  For the year
                                                               30 June                 ended
                                                                                 31 December
                                                                                            
                                                       (Unaudited)  (Unaudited)    (Audited)
                                                                                            
    (US$'000)                                                 2017         2016         2016
                                                                                            
    Current tax:                                                                            
                                                                                            
    Current tax on profits for the period                   31,793       27,843       54,508
                                                                                            
    Adjustments in respect of prior years1                       0      36,6041       36,697
                                                                                            
    Total current tax                                       31,793       64,447       91,205
                                                                                            
    Deferred tax:                                                                           
                                                                                            
    Origination and reversal of temporary                    5,209      43,2972       55,908
    differences2                                                                            
                                                                                            
    Total deferred tax                                       5,209       43,297       55,908
                                                                                            
    Income tax expense                                      37,002      107,744      147,113

    1 Included in this amount for 2016 is a provision for uncertain tax positions
    of US$32.3 million relating to North Mara, and US$4.4 million relating to
    Tulawaka, following an adverse tax ruling as reported in Q1 2016.

    2 Included in this amount for 2016 is a provision for uncertain tax positions
    of US$35.0 million relating to Bulyanhulu following an adverse tax ruling, as
    reported in Q1 2016.

    The tax on the Group's profit before tax differs from the theoretical amount
    that would arise using the weighted average tax rate applicable to the profits
    of the consolidated entities as follows:

                                                      For the six months ended  For the year
                                                               30 June              ended 31
                                                                                    December
                                                                                            
                                                       (Unaudited)  (Unaudited)    (Audited)
                                                                                            
    (US$'000)                                                 2017         2016         2016
                                                                                            
    Profit/(loss) before tax                                99,545      101,616      242,057
                                                                                            
    Tax calculated at domestic tax rates applicable         30,519       28,481       73,373
    to profits in the respective countries                                                  
                                                                                            
    Tax effects of:                                                                         
                                                                                            
    Expenses not deductible for tax purposes                    57          463          247
                                                                                            
    Tax losses for which no deferred income tax asset        6,426        7,100       76,592
    was recognised3                                                                         
                                                                                            
    Adjustments to unrecognised tax benefits carried             -       69,916            -
    forward4                                                                                
                                                                                            
    Prior year adjustments                                       -        1,784      (3,099)
                                                                                            
    Tax charge                                              37,002      107,744      147,113

    3 The reconciliation includes an amount of US$69.9 million for 2016 relating to
    an increase in the amount of unrecognised tax liabilities carried forward. The
    adjustment reflects uncertainty regarding recoverability of certain tax losses,
    and gives rise to an increased deferred tax charge.

    Tax periods remain open to review by the Tanzanian Revenue Authority (TRA) in
    respect of income taxes for five years following the date of the filing of the
    corporate tax return, during which time the authorities have the right to raise
    additional tax assessments including penalties and interest. Under certain
    circumstances the reviews may cover longer periods. Because a number of tax
    periods remain open to review by tax authorities, there is a risk that
    transactions that have not been challenged in the past by the authorities may
    be challenged by them in the future, and this may result in the raising of
    additional tax assessments plus penalties and interest.

    10. (Loss)/ earnings Per Share (EPS)

    Basic EPS is calculated by dividing the net (loss)/ profit for the period
    attributable to owners of the Company by the weighted average number of
    Ordinary Shares in issue during the year.

    Diluted earnings per share is calculated by adjusting the weighted average
    number of Ordinary Shares outstanding to assume conversion of all dilutive
    potential Ordinary Shares. The Company has dilutive potential Ordinary Shares
    in the form of stock options. The weighted average number of shares is adjusted
    for the number of shares granted assuming the exercise of stock options.

    At 30 June 2017, 30 June 2016 and 31 December 2016, (loss)/ earnings per share
    have been calculated as follows:

                                                              For the six months ended  For the year
                                                                      30 June              ended    
                                                                                        31 December 
                                                                                                    
                                                         (Unaudited)   (Unaudited)    (Audited)     
                                                                                                    
    (US$'000)                                                   2017          2016         2016     
                                                                                                    
    (Loss)/ earnings                                                                                
                                                                                                    
    Net (loss)/ profit attributable to owners of the parent        62,543       (6,128)       94,944
                                                                                                    
    Weighted average number of Ordinary Shares in issue       410,085,499   410,085,499  410,085,499
                                                                                                    
    Adjusted for dilutive effect of stock options                 382,474       277,889      355,514
                                                                                                    
    Weighted average number of Ordinary Shares for diluted    410,467,973   410,363,388  410,441,013
    earnings per share                                                                              
                                                                                                    
    (Loss)/ earnings per share                                                                      
                                                                                                    
    Basic (loss)/ earnings per share (cents)                         15.3         (1.5)         23.2
                                                                                                    
    Dilutive (loss)/ earnings per share (cents)                      15.2         (1.5)         23.1
                                                                                                    

    11. Dividends

    The final dividend declared in respect of the year ended 31 December 2016 of
    US$34.4 million (US0.8 cents per share) was paid during May 2017. No 2017
    interim dividend has been declared based on the Group's year-to-date negative
    free cash flow.

    12. Property, Plant and Equipment

    For the six months ended 30 June         Plant and        Mineral Assets under       Total
    2017 (Unaudited)                         equipment properties and construction            
     (US$'000)                                                   mine            ¹            
                                                          development                         
                                                                costs                         
                                                                                              
    At 1 January 2017, net of                  553,993        842,019       47,164   1,443,176
    accumulated depreciation and                                                              
    impairment                                                                                
                                                                                              
    Additions                                        -              -       91,209      91,209
                                                                                              
    Non-cash reclamation asset                       -              -          134         134
    adjustments                                                                               
                                                                                              
    Foreign currency translation                   512              -            -         512
    adjustments                                                                               
                                                                                              
    Disposals/write-downs                            -              -            -           -
                                                                                              
    Depreciation                              (37,854)       (31,868)            -    (69,722)
                                                                                              
    Transfers between categories                21,373         74,511     (95,884)           -
                                                                                              
    At 30 June 2017                            538,024        884,662       42,623   1,465,309
                                                                                              
    At 1 January 2017                                                                         
                                                                                              
    Cost                                     1,914,522      1,777,277       47,164   3,738,963
                                                                                              
    Accumulated depreciation and           (1,360,529)      (935,258)            - (2,295,787)
    impairment                                                                                
                                                                                              
    Net carrying amount                        553,993        842,019       47,164   1,443,176
                                                                                              
    At 30 June 2017                                                                           
                                                                                              
    Cost                                     1,936,407      1,851,788       42,623   3,830,818
                                                                                              
    Accumulated depreciation and           (1,398,383)      (967,126)            - (2,365,509)
    impairment                                                                                
                                                                                              
    Net carrying amount                        538,024        884,662       42,623   1,465,309

       

    For the six months ended 30 June      Plant and         Mineral    Assets       Total   
    2016 (Unaudited)                     equipment   properties and    under                
    (US$'000)                                                  mine construction            
                                                        development      ¹                  
                                                              costs                         
                                                                                            
    At 1 January 2016, net of                572,877        761,592       56,244   1,390,713
    accumulated depreciation and                                                            
    impairment                                                                              
                                                                                            
    Additions                                      -              -       82,348      82,348
                                                                                            
    Non-cash reclamation asset                     -              -       19,196      19,196
    adjustments                                                                             
                                                                                            
    Foreign currency translation               1,441              -            -       1,441
    adjustments                                                                             
                                                                                            
    Disposals/write-downs                      (137)              -            -       (137)
                                                                                            
    Depreciation                            (49,362)       (30,005)            -    (79,367)
                                                                                            
    Transfers between categories              41,169         60,801    (101,970)           -
                                                                                            
    At 30 June 2016                          565,988        792,388       55,818   1,414,194
                                                                                            
    At 1 January 2016                                                                       
                                                                                            
    Cost                                   1,845,234      1,636,413       56,244   3,537,891
                                                                                            
    Accumulated depreciation and         (1,272,357)      (874,821)            - (2,147,178)
    impairment                                                                              
                                                                                            
    Net carrying amount                      572,877        761,592       56,244   1,390,713
                                                                                            
    At 30 June 2016                                                                         
                                                                                            
    Cost                                   1,887,676      1,697,214       55,818   3,640,708
                                                                                            
    Accumulated depreciation and         (1,321,688)      (904,826)            - (2,226,514)
    impairment                                                                              
                                                                                            
    Net carrying amount                      565,988        792,388       55,818   1,414,194

       

    For the year ended 31 December 2016      Plant and       Mineral Assets under       Total
    (Audited)                                equipment    properties construction            
     (US$'000)                                              and mine            ¹            
                                                         development                         
                                                               costs                         
                                                                                             
    At 1 January 2016, net of                  572,877       761,592       56,244   1,390,713
    accumulated depreciation and                                                             
    impairment                                                                               
                                                                                             
    Additions                                        -             -      191,139     191,139
                                                                                             
    Non-cash reclamation asset                       -             -       21,955      21,955
    adjustments                                                                              
                                                                                             
    Foreign currency translation                 2,203             -            -       2,203
    adjustments                                                                              
                                                                                             
    Disposals/write-downs                      (6,533)             -            -     (6,533)
                                                                                             
    Depreciation                              (95,864)      (60,437)            -   (156,301)
                                                                                             
    Transfers between categories                81,310       140,864    (222,174)           -
                                                                                             
    At 31 December 2016                        553,993       842,019       47,164   1,443,176
                                                                                             
    At 1 January 2016                                                                        
                                                                                             
    Cost                                     1,845,234     1,636,413       56,244   3,537,891
                                                                                             
    Accumulated depreciation and           (1,272,357)     (874,821)            - (2,147,178)
    impairment                                                                               
                                                                                             
    Net carrying amount                        572,877       761,592       56,244   1,390,713
                                                                                             
    At 31 December 2016                                                                      
                                                                                             
    Cost                                     1,914,522     1,777,277       47,164   3,738,963
                                                                                             
    Accumulated depreciation and           (1,360,529)     (935,258)            - (2,295,787)
    impairment                                                                               
                                                                                             
    Net carrying amount                        553,993       842,019       47,164   1,443,176

    1 Assets under construction represents (a) sustaining capital expenditures
    incurred constructing property, plant and equipment related to operating mines
    and advance deposits made towards the purchase of property, plant and
    equipment; and (b) expansionary expenditure allocated to a project on a
    business combination or asset acquisition, and the subsequent costs incurred to
    develop the mine. Once these assets are ready for their intended use, the
    balance is transferred to plant and equipment and/or mineral properties and
    mine development costs.

    Leases

    Property, plant and equipment includes assets relating to the design and
    construction costs of power transmission lines and related infrastructure. At
    completion, ownership was transferred to TANESCO in exchange for amortised
    repayment in the form of reduced electricity supply charges. No future lease
    payment obligations are payable under these finance leases.

    Property, plant and equipment also includes five drill rigs purchased under
    short-term finance leases.

    The following amounts were included in property, plant and equipment where the
    Group is a lessee under a finance lease:

                                                        For the six months ended  For the year 
                                                                 30 June              ended    
                                                                                   31 December 
                                                                                               
                                                        (Unaudited)   (Unaudited)     (Audited)
                                                                                               
    (US$'000)                                                  2017          2016          2016
                                                                                               
     Cost - capitalised finance leases                       51,618        51,617        51,617
                                                                                               
     Accumulated depreciation and                          (42,050)      (36,392)      (40,925)
    impairment                                                                                 
                                                                                               
     Net carrying amount                                      9,568        15,225        10,692

    13. Derivative Financial Instruments

    The table below analyses financial instruments carried at fair value, by
    valuation method. The Group has derivative financial instruments in the form of
    economic and cash flow hedging contracts which are all defined as level two
    instruments as they are valued using inputs other than quoted prices that are
    observable for the assets or liabilities. The following tables present the
    group's assets and liabilities that are measured at fair value at 30 June 2017,
    30 June 2016 and 31 December 2016.

                                                          Assets              Liabilities      
                                                                                               
                                                    Current Non-current     Current Non-current
    (US$'000)                                                                                  
                                                                                               
    For the six months ended 30 June 2017                                                      
    (Unaudited)                                                                                
                                                                                               
    Interest contracts: Designated as cash              528         611         518           -
    flow hedges                                                                                
                                                                                               
    Commodity contracts - Fuel: Not designated           73         159         596       1,068
    as hedges                                                                                  
                                                                                               
    Total                                               601         770       1,114       1,068
                                                                                               

       

                                                          Assets              Liabilities      
                                                                                               
                                                    Current Non-current     Current Non-current
    (US$'000)                                                                                  
                                                                                               
    For the six months ended 30 June 2016                                                      
    (Unaudited)                                                                                
                                                                                               
    Interest contracts: Designated as cash                -           -         434         320
    flow hedges                                                                                
                                                                                               
    Currency contracts: Not designated as                 -           -       6,761           -
    hedges                                                                                     
                                                                                               
    Commodity contracts - Fuel: Not designated            9         129       3,778         268
    as hedges                                                                                  
                                                                                               
    Total                                                 9         129      10,973         588
                                                                                               

       

                                                    Assets            Liabilities              
                                                                                               
                                             Current Non-current    Current Non-current        
    (US$'000)                                                                                  
                                                                                               
    For the year ended 31 December 2016                                                        
    (Audited)                                                                                  
                                                                                               
    Interest contracts: Designated as             33         255         73           -     215
    cash flow hedges                                                                           
                                                                                               
    Commodity contracts - Fuel: Not            1,310         566        511          30   1,335
    designated as hedges                                                                       
                                                                                               
    Total                                      1,343         821        584          30   1,550
                                                                                               

    14. Inventories

                                                        For the six months ended    For the year  
                                                                 30 June               ended      
                                                                                    31 December   
                                                                                                  
                                                        (Unaudited)   (Unaudited)        (Audited)
                                                                                                  
    (US$'000)                                                  2017          2016             2016
                                                                                                  
    Raw materials                                                                                 
                                                                                                  
    Ore in stockpiles                                        14,041        17,733            8,270
                                                                                                  
    Mine operating supplies                                 154,859       145,936          143,609
                                                                                                  
    Work in process                                          10,807        14,632           10,534
                                                                                                  
    Finished products                                                                             
                                                                                                  
    Gold doré/bullion                                         7,084         5,424            8,692
                                                                                                  
    Gold, copper and silver concentrate                      93,901        11,932           13,208
                                                                                                  
    Total current portion of inventory                      280,692       195,657          184,313
                                                                                                  
    Non-current ore in stockpiles¹                          115,775        87,050           98,936
                                                                                                  
    Total                                                   396,467       282,707          283,249

    15. Other Current Assets

                                                        For the six months ended  For the year 
                                                                 30 June              ended    
                                                                                   31 December 
                                                                                               
                                                        (Unaudited)   (Unaudited)     (Audited)
                                                                                               
    (US$'000)                                                  2017          2016          2016
                                                                                               
    Other current assets:                                                                      
                                                                                               
    Current portion of indirect tax                         157,936        50,787       128,423
    receivables                                                                                
                                                                                               
    Other receivables and advance                            32,932        35,443        21,095
    payments1                                                                                  
                                                                                               
    Total                                                   190,868        86,230       149,518

    1 Other receivables and advance payments relate to prepayments for insurance
    and income taxes offset against outstanding refunds for VAT and fuel levies and
    current amounts receivable from the NSSF of US$2.3 million (2016: US$5.0
    million).

    16. Borrowings

    During 2013, a US$142 million facility was put in place to fund the bulk of the
    costs of the construction of one of Acacia's key growth projects, the
    Bulyanhulu CIL Expansion project ("Project"). The Facility is collateralised by
    the Project, has a term of seven years with a spread over Libor of 250 basis
    points. In common with borrowing agreements of this nature the facility
    includes various covenants as well as a material adverse effect clauses.  The
    interest rate has been fixed at 3.6% through the use of an interest rate swap.
    The 7 year Facility is repayable in equal $14.2 million bi-annual instalments
    over the term of the Facility, after a two year repayment holiday period. The
    full facility of US$142 million was drawn at the end of 2013. The first
    principal payment of US$14.2 million was paid in H2 2015 and regular repayments
    have been made each half year. As at 30 June 2017 the balance owing was US$85.2
    million (2016: US$99.4 million) all covenants have been complied with. Interest
    accrued to the value of US$0.6 million (2016: US$0.6 million) was included in
    accounts payable at the end of the period. Interest incurred on the borrowings
    as well as hedging losses on the interest rate swap for the period ended 30
    June 2017 was US$1.2 million (2016: US$4.0 million).

    17. Cash flow - other items

    a) Operating cash flows - other items

    Movements relating to working capital items

                                                     For the six months ended    For the
                                                             30 June                year
                                                                                   ended
                                                                                      31
                                                                                December
                                                                                        
                                                      (Unaudited)  (Unaudited) (Audited)
                                                                                        
    (in thousands of United States dollars)                  2017         2016      2016
                                                                                        
    Indirect and corporate taxes1                        (51,047)     (13,015)  (59,100)
                                                                                        
     Increase in current indirect tax receivable         (33,747)      (3,015)  (18,224)
                                                                                        
     Prepaid corporate tax                                      -     (10,000)  (20,000)
                                                                                        
     Income tax paid                                     (17,300)            -  (20,876)
                                                                                        
    Other current assets                                    6,519        4,512       695
                                                                                        
    Trade receivables                                       6,931      (5,756)   (4,472)
                                                                                        
    Inventories2                                        (113,217)      (7,770)   (8,312)
                                                                                        
    Other liabilities                                     (7,626)      (3,027)    33,582
                                                                                        
    Share based payments3                                   (834)       19,635  (35,966)
                                                                                        
    Trade and other payables4                                 795     (10,905)    15,931
                                                                                        
    Other working capital items5                          (1,218)           20     (855)
                                                                                        
    Total                                               (159,697)     (16,306)  (58,497)

    1 During the year, we have made US$17.3 million (US$20 million 2016) corporate
    tax provisional payments. This has been funded through an offset against
    current indirect taxes that was due for refund.

    2 The inventory adjustment includes the movement in current as well as the
    non-current portion of inventory.

    3 During the year, share based payments of US$0.8 million was made.

    4 The trade and other payables adjustment exclude statutory liabilities in the
    form of income tax payable.

    5 Other working capital items include exchange losses associated with working
    capital.

    Other non-cash items

                                                       For the six months ended For the year
                                                                        30 June        ended
                                                                                 31 December
                                                                                            
                                                        (Unaudited) (Unaudited)    (Audited)
                                                                                            
    (in thousands of United States dollars)                    2017        2016         2016
                                                                                            
    Adjustments for non-cash income statement items:                                        
                                                                                            
    Foreign exchange (gains)/losses                           4,734     (1,070)      (1,463)
                                                                                            
    Discounting of indirect tax receivables                       -     (6,508)      (9,719)
                                                                                            
    Provisions settled                                        2,101        (11)          (8)
                                                                                            
    Unrealised gain on derivatives                            2,431     (1,352)     (13,031)
                                                                                            
    Stock option expense                                          6          49           77
                                                                                            
    Provisional tax offsets                                (17,300)           -            -
                                                                                            
    Other non-cash items                                       (30)       (105)           36
                                                                                            
    Exchange loss on revaluation of cash balances             (151)          45          258
                                                                                            
    Total                                                   (8,209)     (8,952)     (23,850)

    b) Investing cash flows - other items

                                                        For the six months ended For the year
                                                                         30 June        ended
                                                                                  31 December
                                                                                             
                                                         (Unaudited) (Unaudited)    (Audited)
                                                                                             
    (in thousands of United States dollars)                     2017        2016         2016
                                                                                             
    Proceeds on sale of property, plant and                        -          40        6,713
    equipment                                                                                
                                                                                             
    Other long-term receivables                                   29       (125)         (10)
                                                                                             
    Rehabilitation expenditure                                 (250)       (110)        (175)

    18. Commitments and Contingencies

    The Group is subject to various laws and regulations which, if not observed,
    could give rise to penalties. As at 30 June 2017, the Group has the following
    commitments and/ or contingencies.

    a)            Legal contingencies

    As at 30 June 2017, the Group was a defendant in a number of lawsuits. The
    plaintiffs are claiming damages and interest thereon for the loss caused by the
    Group due to one or more of the following: unlawful eviction, termination of
    services and/or, non-payment for services, defamation, negligence by act or
    omission in failing to provide a safe working environment, unpaid overtime,
    public holiday compensation and various other commercial/project disputes.

    The Group's Legal Counsel is defending the Group's current position, and the
    outcome of the lawsuits cannot presently be determined. However, in the opinion
    of the Directors and Group's Legal Counsel, no material liabilities are
    expected to materialise from these lawsuits that have not already been provided
    for.

      * An adjudication claim for US$115 million by Bismark Hotel Limited relating
        to an alleged breach of contract under an Option Agreement signed in 1995.
        The claim relates to an application for a prospecting licence with no
        attributable reserves, resources or value. We are waiting for the
        adjudicators to fix a hearing date. Management are of the opinion that the
        claim is without merit and that it will be successfully defended.
      * An arbitration award of US$4 million, relating to a historical arbitration
        between North Mara Gold Mine Limited (NMGML) and Diamond Motors Limited
        (DML) in respect of an alleged breach of contract claim in relation to the
        interpretation of periodic   rate review requirements and   other
        provisions of drilling services contracts. NMGML counterclaimed against the
        amount and raised a provision of US$6.2 million reflecting the view of
        NMGML as to the proper interpretation and application of the rate review
        clauses of the contracts. An arbitral tribunal decided in favour of NMGML
        on the material grounds  of  the  claim  on  10 August  2015, with an award
        of US$4 million  for  unpaid  rates  to  DML  for  the  period  up to
        September 2013. The Tribunal found that the subsequent period fell to be
        determined by negotiation of the parties pursuant to the contractual terms
        and should be calculated based on the tribunal's judgment. After the Award
        was issued, DML: (i) sought to challenge the Award in the Commercial Court;
        and (ii) filed a winding up application against NMGML based on unpaid rates
        for 2014 and 2015. NMGML petitioned the High Court to stay the winding up
        petition, given that the underlying debt and alleged indebtedness for 2014/
        2015 must be determined by arbitration. The stay was rejected on the basis
        that winding up procedures cannot be determined by arbitration. This
        decision is on appeal. DML recently applied to strike out the appeal on the
        basis that the record on appeal was not timely filed.  We will be opposing
        this application, which may not be heard by the Court of Appeal for some
        months.  We are currently assessing options available to determine the
        amount payable to DML for 2014/2015 in order to reach an agreement on this
        and to have all Court proceedings set aside.  The hearing for the
        application to wind up North Mara has yet to be scheduled. Payment has been
        made for the Arbitration award (US$4 million) and we continue to carry a
        provision of US$2.2 million as provisioned for the first arbitration.
      * A contractual dispute between various Acacia operating companies and
        Petrolube/ISA to the value of US$35.1 million. The Acacia entities
        terminated contractual supply relationships for: (i) the provision of
        hoses, fittings and assembly services to operating entities by ISA on
        Notice of 5 July 2016; and (ii) the provision of lubricants and associated
        services by Petrolube to operating entities on 5 July 2016, in each case
        pursuant to the express termination without cause provisions in the
        agreement, and following retendering of relevant services and as a result
        of various breaches of contract relating to the provision of Petrolube/ISA
        services (including issues relating to reliability of prior supplies and
        quality of products) and various other breaches of contract by Petrolube/
        ISA.  The termination of the Petrolube/ISA contracts resulted in Petrolube
        / ISA commencing proceedings and procedural applications in the High Court
        of Tanzania. This was undertaken despite the contracts providing for
        arbitration as the principal dispute resolution mechanism. Petrolube /ISA's
        ultimate objective was to have the termination of the agreements set aside
        on the basis of unlawful termination and to recover various damages limbs,
        including loss of profits, and other general damages (US$ 56,080,878.46 -
        Petrolube Claim and US$ 24,868,942.64 ISA Claim). We have challenged all
        elements of these Court proceedings and have also challenged the
        jurisdiction of the Court together with an application for a stay of
        proceedings, given that the contracts require all disputes to be referred
        to arbitration following principal to principal dispute discussions. We
        have also filed petitions to stay these amended plaints (again, on the
        basis of the contractual dispute resolution process) and are waiting for
        these to be determined. In conjunction with these court proceedings,
        however, we have commenced separate arbitration proceedings in accordance
        with the dispute resolution procedures under the relevant contracts.
      * A claim for compensation against NMGML in relation to the destruction of an
        office building and stone crusher machine. The damage to the property was
        caused by the Tanzanian Police Force. The claim has been re-filed in the
        High Court and awaits scheduling. Management   expects   to be   able   to
        defend   the   claim successfully as the damage of the property was caused
        by the Tanzanian Police Force; therefore no provision has been made.

    b) Tax-related contingencies

    The TRA has issued a number of tax assessments to the Group related to past
    taxation years from 2002-onwards. The Group believes that the majority of these
    assessments are incorrect and has filed objections and appeals accordingly in
    an attempt to resolve these matters by means of discussions with the TRA or
    through the Tanzanian appeals process. These include the following:

      * A TRA assessment of US$21.3 million in respect of Tusker Gold Limited. The
        tax assessment is based on the sales price of the Nyanzaga property of
        US$71 million multiplied by the tax rate of 30%. Management is of the view
        that the assessment is invalid due to the fact that the acquisition is for
        Tusker Gold Limited, a company incorporated in Australia. The shareholding
        of the Tanzanian related entities did not change and the Tusker Gold
        Limited group structure remains the same as prior to the acquisition. The
        case was decided in favour of Acacia however the TRA appealed that
        decision. The tax tribunal upheld the decision in favour of Acacia however
        the TRA has appealed to the Court of Appeal. We are awaiting a hearing date
        to be set.
      * A TRA assessment to the value of US$41.3 million for withholding tax on
        certain historic offshore dividend payments paid by Acacia Mining plc to
        its shareholders in 2010 to 2013 arguing that these were sourced from
        within Tanzania. Acacia is appealing this assessment on the substantive
        grounds that, as an English incorporated company, it is not resident in
        Tanzania for taxation purposes. The appeal is currently pending at the
        Court of Appeal.
      * Further TRA assessments issued to Acacia Mining plc in January 2016 to the
        value of US$500.7 million, based on an allegation that Acacia is resident
        in Tanzania for corporate and dividend withholding tax purposes. The
        corporate tax assessments have been levied on certain Group net profits
        before tax. We are in the process of appealing these assessments at the TRA
        Board level. Acacia's substantive grounds of appeal are, again, based on
        the correct interpretation of Tanzanian permanent establishment principles
        and law, relevant to a non-resident English incorporated company.
      * In addition, in Q1 2016 we received a judgement from the Court of Appeal
        regarding a long standing dispute over tax calculations at Bulyanhulu from
        2000-2006. The Court of Appeal was reviewing seven issues initially raised
        by the TRA in 2012 regarding certain historic tax loss carry forwards and
        ruled in favour of Bulyanhulu by the Tax Appeals Board in 2013. The TRA
        appealed against this ruling and in 2014 the Tax Tribunal reversed the
        decision for all seven issues. Acacia appealed against this judgement and
        in March 2016 the Court of Appeal found in favour of the TRA in five of the
        seven issues. The legal route in Tanzania has now been exhausted; however
        we are considering our options for the next steps. The Court of Appeal
        ruling does not have a short term cash flow impact but means that
        Bulyanhulu will be in a tax payable situation approximately one year
        earlier than previously expected.  Acacia is yet to receive a revised tax
        assessment following the judgement, but has raised further tax provisions
        of US$69.9 million in order to address the direct impact of the ruling on
        Bulyanhulu's tax loss carry forwards and the potential impact this may have
        on the applicability of certain capital deductions for other years and our
        other mines. The additional tax provisions raised are US$35.1 million
        relating to Bulyanhulu, US$30.4 million relating to North Mara and US$4.4
        million relating to Tulawaka and were all raised in H1 2016. Total
        provisions for uncertain tax positions now amount to US$128 million.

    19. Related party balances and transactions

    The Group has related party relationships with entities owned or controlled by
    Barrick Gold Corporation, which is the ultimate controlling party of the Group.

    The Company and its subsidiaries, in the ordinary course of business, enter
    into various sales, purchase and service transactions and other professional
    services arrangements with others in the Barrick Group. These transactions are
    under terms that are on normal commercial terms and conditions. These
    transactions are not considered to be significant.

    At 30 June 2017 the Group had no loans of a funding nature due to or from
    related parties (30 June 2016: zero; 31 December 2016: zero).