Atos : Q3 2025 Performance

@3 2O2S

Oct. 21St, 2O2S

Discloimer

I 21/10/2025 I Atos Q3 2025 Performance I @ Atos - for external use

AtoS Group

This document contains forward-looking statements that involve risks and uncertainties, including references, concerning the Group's expected growth and profitability in the future which may significantly impact the expected performance indicated in the forward-looking statements. These risks and uncertainties ore linked to factors out of the control of the Company and not precisely estimated, such as market conditions or competitors' behaviors. Any forward-looking statements made in this document ore statements about Atos's beliefs and expectations and should be evaluated as such. Forward-looking statements include statements that may relate to Atos's plans, objectives, strategies, goals, future events, future revenues or synergies, or performance, and other information thot is not historical information. Actual events or results may differ from those described in this document due to a number of risks and uncertainties that ore described within the 2024 Universal Registration Document filed with the Autorité des Marchés Financiers (AMF) on April 1O, 2025 under the registration number D.25-0238 and the half-year report as of June 3O, 2025 published by Atos Group on August 1, 2025. Atos does not undertake, and specifically disclaims, any obligation or responsibility to update or amend any of the information above except as otherwise required by law. This document does not contain or constitute on offer of Atos's shores for sole or on invitation or inducement to invest in Atos's shares in France, the United States of America or any other jurisdiction. This document includes information on specific transactions thot shall be considered as projects only. In particular, any decision relating to the information or projects mentioned in this document and their terms and conditions will only be made after the ongoing in-depth analysis considering tax, legal, operational, finance, HR and all other relevant aspects have been completed and will be subject to general market conditions and other customary conditions, including governance bodies and shareholders' approval as well as appropriate processes with the relevant employee representative bodies in accordance with applicable lows.

Business highlights

@3 2025

Group Choirmon & CEO

AtoS Group

@3 2025 performance in line

6 I 21/10/2025 I Atos Q3 2025 Performance I @ Atos - for external use

AtoS Group

with full-year profitability & cosh trajectory

Growth engine reset

yielding first results

Genesis plan in motion

Management team reinforced

to restore strong financial fundamentals

to focus on ongoing execution

Continuous progress in the execution of Genesis oction plon

People

Portfolio review

Delivery and G&A optimization

• Effective operation with Data & Al business line live in August

• AI skills transformation program

  underway:

  • AI Fluency program to upskill global workforce

  • Strategic AI leadership program for senior executives

  • Foundational program for data &

Al

• 6 additional countries commercially & operationally inactive (out of Global Delivery Centers activities)

• Further reduction in low profitability* contracts exposure reflecting disciplined execution and portfolio reshaping

  • Billability rote stabilized throughout Q3 2O25, despite continued growth in offshoring initiatives

  • Restructuring plan progressing at pace:

    • Net headcount reduction of 2,629 over Q3 25, mostly driven by Genesis

    • Cosh restructuring cost of C87 million

• Soles enablement training and upskilling programs developed and being deployed

  * Below 5% project margin

  9 I 21/10/2025 I Atos Q3 2025 Performance I @ Atos - for external use

  AtoS Group

• Long Term Incentive program launched for key leaders

  o Reorganization plan launched in France in September

• Non personal cost savings

accelerated during Q3

Workforce evolution reflecting Genesis execution

-3.8%

+1,692

dd,9d8

-2,490

-1,831

Headcount as of

30/Od/25

Scope

Hirings

Leavers

Restructuring, Headcount as of dismissals & others 30/09/25

Voluntary attrition YTD rote = 15.1% & £}3 2025 = 14.4%

vs 17.7% in Q3 2024

10 21/10/2025 I Atos Q3 2O25 Results I @ Atos - for external use

AtoS Group