ALTEN GROUP: Business in first quarter 2026

PRESS RELEASE

Paris, April 28th, 2026
17:40 p.m. CET

ACTIVITY AT END MARCH 2026

• Released figures: -0.8%
• Organic growth: + 0.1%
• 1 acquisition

ACTIVITY AT THE END OF MARCH 2026: - 0.8%

Activity declined by 0.8% as of end-March, penalized by foreign-exchange effects (+1.3% in France and -1.9% outside France). At constant scope and exchange rates, growth was +0.1% (+0.3% in France and 0% outside France).

In line with the last quarter of 2025, activity is gradually stabilizing, mainly driven by accelerating growth in the Aerospace and Defense & Security sectors.

The Automotive sector continues to decline (at a slower pace than last year), as do the Telecom and Life Sciences sectors.

Activity is stable or growing in France, the UK, Southern Europe and APAC, and slightly declining in Germany, the Benelux, Eastern Europe and North America. The slowdown remains more pronounced in the Nordics.

EXTERNAL GROWTH: 1 ACQUISITION

A company specializing in IT Services (revenue: €68m; 470 consultants).

OUTLOOK FOR 2026:

The macroeconomic environment remains fragile and the geopolitical context highly uncertain. Several sectors have not yet returned to growth, and activity remains broadly sluggish.

In the current context, ALTEN expects organic growth between 0% and -0.5% for the first half of 2026, as well as for the full year. Under this assumption, the operating profitability from activity in 2026 is nevertheless expected to be higher than that achieved in 2025.

Developments in the Middle East, could obviously have significant consequences on our clients’ investment decisions and therefore on performance—consequences that cannot be anticipated at this stage.

Engineering and IT Services page 2

AGENDA:

Publication of activity for Q2 2026: Tuesday 28 July 2026

About ALTEN

For all information: www.alten.com/investisseurs – Press contact: alten@hopscotch.fr

World leader in Engineering and IT Services, ALTEN delivers design and engineering projects for Technical Departments and CIO organizations of major industrial, telecom and service-sector clients.

ALTEN shares are listed in compartment A of Euronext Paris (ISIN FR0000071946), are part of the SBF 120, the IT CAC 50 and the MIDCAP 100 indices, and are eligible for SRD.

Engineering and IT Services

APPENDIX TO THE PRESS RELEASE:

Definition of alternative performance measures and reconciliation with IFRS standards

The ALTEN Group uses alternative performance measures especially selected to follow up on its operational activities. The Group has chosen these measures as they supply additional information allowing the users of periodic financial information to have a comprehensive understanding of the Group’s performance. Such alternative performance measures are complementary to IFRS standards.

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

Growth on a like-for-like basis (and constant exchange rate) is calculated excluding the effects of exchange rate variations and the variations of the consolidation scope on a chosen period.

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

Scope variation impacts are measured excluding acquisitions. revenue of the period and for transfers. revenue of the previous period. in order to create a scope which is identical to the previous period. This alternative measure enables to identify the real performance of the Group in terms of activity on the chosen period.

Growth activity in Q1 2026