Earnings release
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PRESS RELEASE Paris, October 27th ,2026 17:40 PM Sensitivity: C1-Internal BUSINESS AT THE END OF SEPTEMBER 2026: +2.9% Acceleration in organic growth 2026 targets revised upwards € Millions YTD Q3 2025 YTD Q3 2026 YoY Change Revenue of which France of which International 3 076,0 1,059.5 (34.4 %) 2,016.5 (65.6 %) 3 164,4 1,122.6 (35.5 %) 2,041.8 (64.5 %) + 2.9 % + 6.0 % + 1.3% BUSINESS AT THE END OF SEPTEMBER 2026: +2.9% As of end-September, revenue growth stood at 2.9%: 6.0% in France and 1.3% outsi de France. At constant scope and exchange rates, organic growth was 2.3% (3.7% in France and 1.5% outside France). In the third quarter, ALTEN generated revenue of €1,055.2 million, up 6.4% compared with the third quarter of 2025. At constant scope and exchange rates, organic growth was 3.6% (4.3% in France and 3.2% outside France). The Aerospace, Defence & Security / Naval and Rail sectors recorded strong growth; Energy and Services also posted satisfactory growth. The decline in the Automotive, Telecoms and Electronics sectors slowed. In the third quarter of 2026, organic growth accelerated, mainly driven by North America and Asia. 2026 OUTLOOKS: Despite an uncertain geopolitical and economic environment, activity contin ued to grow in the third quarter, leading ALTEN to expect organic growth of approximately 2% in 2026 (despite an unfavourable comparison base in the fourth quarter of 2025, when activity had grown strongly). The operating margin on activity should therefore continue to improve and reach approximately 9.3% in 2026. FINANCIAL CALENDAR: Publication of 2026 annual results: Tuesday, 23 February 2027 at 5:40 p.m. CET About ALTEN For complete information, visit www.alten.com/investors - Media contact: alten@hopscotch.fr As a European Leader in Engineering and Technology Consulting (ETC), ALTEN carries out design and research projects for 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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Engineering and IT Services page 2 Sensitivity: C1-Internal APPENDIX TO 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 additi onal information allowing the users of periodic financial information to have a c omprehensive understanding of the Group’s performance. Su ch 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 e xchange 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 by excluding revenue of the period from acquisitions and revenue of the previous period from disposals 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 in business 2026 €M Revenue at the end of September 2025 Revenue at the end of September 2026 Change % Revenue on a like-for-like basis 3,071.0 3,140.6 +2.3% France 1,059.5 1,098.3 3.7% International 2,011.5 2,042.3 1.5% Change in scope 5.0 52.1 +1.5% France 24.3 2.3% International 5.0 27.8 1.1% Exchange rate impact -28.3 -0.9% France - International -28.3 -1.4% Group revenue 3,076.0 3,164.4 +2.9 % France 1,059.5 1,122.6 + 6.0% International 2,016.5 2,041.8 + 1.3%