Ian Simm
Net worth: 13 M $ as of 30/05/2026
Net worth: 13 M $ as of 30/05/2026
Ian Richard Simm is the founder of Impax Asset Management Ltd. (Private Equity), founded in 1996, serving as CEO; Impax Asset Management Ltd., founded in 1998, serving as Chief Executive Officer; Impax Asset Management Group Plc (Investment Management), founded in 1998, serving as Chief Executive Officer; Impax Asset Management Group Plc, founded in 1998, serving as Chief Executive Officer & Executive Director; and Impax Asset Management (AIFM) Ltd., founded in 2013, serving as Chief Executive Officer.
Current jobs include Co-Managing Director at Ambulantis BSW GmbH; Director at The Institutional Investors Group.
On Climate Change Ltd. since 2019 ; Director at Impax Global Opportunities Fund LP; Director at CCPF No.
4 (GP) Ltd. since 2014; and Member of the Net Zero Council.
Former jobs include Member at Natural Environment Research Council from 2013 to 2018 and Engagement Manager at McKinsey & Co., Inc. (United Kingdom).
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 29/09/2025 | 9,572,033 ( 7.53% ) | 13 M $ | 30/05/2026 |
| Companies | Position | Start |
|---|---|---|
| IMPAX ASSET MANAGEMENT GROUP PLC | Founder | 31/12/1997 |
Impax Asset Management Ltd.
Impax Asset Management Ltd. Investment ManagersFinance IAM invests on behalf of their clients in both listed equity and private equity infrastructure strategies. The firm’s investments are based on a strong conviction that among other macro-economic trends, population dynamics, resource scarcity, inadequate infrastructure and environmental constraints will profoundly shape global markets, creating investment risks and opportunities. ESG analysis is an integral part of their investment research process. The most attractive stocks are identified by the research intensive, bottom-up, stock picking process described in the previous section above which focuses on upside to target price. This bottom-up process is then complemented by a top-down macro-economic overlay to ensure that the firms’ research is also focused on the most promising regions and sectors. | Chief Executive Officer | 31/05/1998 |
Impax Asset Management (AIFM) Ltd.
Impax Asset Management (AIFM) Ltd. Investment ManagersFinance IAFM invests on behalf of their clients in both listed equity and private equity infrastructure strategies. The firm aims to generate outperformance over the long term by investing in the most attractive stocks identified by research intensive, bottom-up, stock picking process. The bottom-up process is complemented by a top-down framework to ensure that research is focused on the most promising regions and sectors. | Chief Executive Officer | 17/12/2013 |
Impax Asset Management Group Plc (Investment Management)
Impax Asset Management Group Plc (Investment Management) Investment ManagersFinance Impax-IM aims to generate superior, risk-adjusted investment returns from opportunities arising from the transition to a more sustainable economy for clients with a medium to long-term horizon. The firm seeks higher quality companies with strong business models that demonstrate sound management of risk. | Chief Executive Officer | 31/12/1997 |
CCPF No. 4 (GP) Ltd.
CCPF No. 4 (GP) Ltd. Real Estate Investment TrustsFinance Provides property investment services | Director/Board Member | 08/07/2014 |
The Institutional Investors Group On Climate Change Ltd.
The Institutional Investors Group On Climate Change Ltd. Investment ManagersFinance Provides investment management services | Director/Board Member | 31/10/2019 |
Impax Asset Management Ltd. (Private Equity)
Impax Asset Management Ltd. (Private Equity) Investment ManagersFinance Impax Asset Management invests in growth companies owning multiple projects across Europe region. The focuses on infrastructure like renewable power generation (wind, solar) and related assets. | Chief Executive Officer | 30/09/1996 |
Impax Global Opportunities Fund LP
Impax Global Opportunities Fund LP Investment ManagersFinance Functions as a private equity fund | Director/Board Member | - |
Ambulantis Bsw GmbH
Ambulantis Bsw GmbH Medical/Nursing ServicesHealth Services Provides outpatient care services | Chief Executive Officer | - |
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Active
Inactive
Listed companies
Private companies
1st degree connections
1st degree companies
Male
Female
Members of the board
Executives
| Private companies | 13 |
|---|---|
Impax Asset Management (AIFM) Ltd.
Impax Asset Management (AIFM) Ltd. Investment ManagersFinance IAFM invests on behalf of their clients in both listed equity and private equity infrastructure strategies. The firm aims to generate outperformance over the long term by investing in the most attractive stocks identified by research intensive, bottom-up, stock picking process. The bottom-up process is complemented by a top-down framework to ensure that research is focused on the most promising regions and sectors. | Finance |
Harvard University
Harvard University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Impax Asset Management Group Plc
Impax Asset Management Group Plc Investment ManagersFinance Provides investment services to listed equity and private equity funds | Finance |
University of Cambridge
University of Cambridge Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Impax Asset Management Ltd.
Impax Asset Management Ltd. Investment ManagersFinance IAM invests on behalf of their clients in both listed equity and private equity infrastructure strategies. The firm’s investments are based on a strong conviction that among other macro-economic trends, population dynamics, resource scarcity, inadequate infrastructure and environmental constraints will profoundly shape global markets, creating investment risks and opportunities. ESG analysis is an integral part of their investment research process. The most attractive stocks are identified by the research intensive, bottom-up, stock picking process described in the previous section above which focuses on upside to target price. This bottom-up process is then complemented by a top-down macro-economic overlay to ensure that the firms’ research is also focused on the most promising regions and sectors. | Finance |
McKinsey & Co., Inc. (United Kingdom)
McKinsey & Co., Inc. (United Kingdom) Investment ManagersFinance Provides investment advisory services | Finance |
Natural Environment Research Council
Natural Environment Research Council General GovernmentGovernment Supports research, training and knowledge transfer activities in the environmental sciences | Government |
Impax Asset Management Ltd. (Private Equity)
Impax Asset Management Ltd. (Private Equity) Investment ManagersFinance Impax Asset Management invests in growth companies owning multiple projects across Europe region. The focuses on infrastructure like renewable power generation (wind, solar) and related assets. | Finance |
Impax Asset Management Group Plc (Investment Management)
Impax Asset Management Group Plc (Investment Management) Investment ManagersFinance Impax-IM aims to generate superior, risk-adjusted investment returns from opportunities arising from the transition to a more sustainable economy for clients with a medium to long-term horizon. The firm seeks higher quality companies with strong business models that demonstrate sound management of risk. | Finance |
CCPF No. 4 (GP) Ltd.
CCPF No. 4 (GP) Ltd. Real Estate Investment TrustsFinance Provides property investment services | Finance |
Ambulantis Bsw GmbH
Ambulantis Bsw GmbH Medical/Nursing ServicesHealth Services Provides outpatient care services | Health Services |
The Institutional Investors Group On Climate Change Ltd.
The Institutional Investors Group On Climate Change Ltd. Investment ManagersFinance Provides investment management services | Finance |
Impax Global Opportunities Fund LP
Impax Global Opportunities Fund LP Investment ManagersFinance Functions as a private equity fund | Finance |
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