Erratum only on the press release in English: First quarter 2025 revenue

ERRATUM only on the press release in English Cancels and replaces the press release issued on April 24, 2025, at 5:40 pm Due to an error in the title, a reversal of the figure: -5.0% => -0.5%

FIRST QUARTER 2025 REVENUE: -0.5%

§ Decline in business at constant scope and exchange rates: -5.5%

EARNINGS AT THE END OF MARCH 2025: -0.5%

Business declined by 0.5%, growing by 4.2% in France and declining by 2.8% outside France. At constant scope and exchange rates, the decline in business was 5.5% (-3.8% in France and -6.3% outside France), impacted by one fewer working day than in 2024. On a constant number of working days basis, the economic decline was 4.5%.

Defense & Security and Energy continue to grow. Automotive and Telecoms are down significantly (>10%).

Except for Southern Europe, which continues to grow, all geographical areas are experiencing a decline. Northern Europe is particularly affected (> -15%), while the decline is more moderate in North America and Asia (around 5%).

In France, business was impacted by budget cuts in the Automotive and Telecommunications sectors, which declined sharply this quarter.

OUTLOOK FOR 2025:

Following a stabilization of activity at the end of 2024 and the beginning of 2025, the global geopolitical and economic context has generated uncertainty and a lack of visibility. Several major groups have adopted a wait-andsee strategy, preferring once again to freeze or postpone their investment projects. In this very uncertain context, ALTEN forecasts an organic decline in its activity of around 6% in the first half of the year and currently lacks sufficient visibility for the second half.

NEXT PUBLICATION: 24TH JULY 2025

Q2 2025 Revenue: Date of Press Release: 24 July 2025 (market close)

About ALTEN: For more information: www.alten.com/investisseurs / Press contacts: alten@hopscotch.fr

As a European Leader in Engineering and Technology Consulting (ETC). Alten carries out design and research projects for the Technical and IT divisions of major clients in industry. telecoms and services. Alten’s stock is listed in compartment A of the Euronext Paris market (ISIN FR000001946); it is part of the SBF 120. the IT CAC 50 index and MIDCAP100. and is eligible for the Deferred Settlement Service (SRD).

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APPENDIX TO PRESS RELEASE:

Definition of alternative performance indicators and reconciliation with IFRS

The Alten Group uses alternative performance indicators selected specifically to track its operational activities. The Group has chosen these indicators as they offer additional information. allowing the users of periodic financial information to have a comprehensive understanding of the Group’s performance. These alternative performance indicators are complementary to IFRS.

Revenue growth on a like-for-like basis (i.e. organic growth)

Growth on a like-for-like basis (constant scope and exchange rates) is calculated excluding the effects of exchange rate fluctuations and changes to the consolidation scope over the reporting period.

Exchange rate impacts are measured by converting the revenue of the period with the average exchange rate from the previous period. 

Scope impact is measured excluding the revenue generated during the period for acquisitions. and excluding the revenue generated in the previous period for disposals and transfers. in order to ensure the new scope is identical to the previous period.

This indicator enables users to identify the group’s intrinsic business performance over the reporting period. 

Growth of activity in Q1 2025

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