Slide 1: Activity at the End of September 2025
ACTIVITY AT THE END OF SEPTEMBER 2025 Bruno Benoliel Deputy Chief Executive Officer Paris, October 23rd 2025
Slide 2: Breakdown of Turnover per Geographical Area (YTD)
BREAKDOWN OF TURNOVER PER GEOGRAPHICAL AREA As at September 30th, 2025 YTD Change Change in Organic, excl. COUNTRY 2024 % 2025 % Published scope Forex Forex effect FRANCE 1 019.2 32.7% 1 059.5 34.4% 4.0% 8.0% 0.0% -4.0% IBERIC 306.2 9.8% 344.0 11.2% 12.3% 7.2% 0.0% 5.1% ITALY 252.6 8.1% 258.3 8.4% 2
Slide 3: Breakdown of Turnover per Geographical Area (Q3 only)
BREAKDOWN OF TURNOVER PER GEOGRAPHICAL AREA As at September 30th, 2025 Q3 only Change Change in Organic, excl. COUNTRY 2024 % 2025 % Published scope Forex Forex effect FRANCE 327.1 32.4% 341.2 34.4% 4.3% 7.7% 0.0% -3.4% IBERIC 99.8 9.9% 112.5 11.3% 12.7% 7.0% 0.0% 5.7% ITALY 80.0 7.9% 82.2 8.3% 2.7%
Slide 4: Turnover by market as at September 30th, 2025
As at September 30th, 2025 4 Automotive & Rail Aerospace, Defense, Market trend 18.2% Security & Naval Rail Automotive Market trend 23.7% Alstom-Bombardier, Siemens… Stellantis, Volkswagen, Renault, Volvo, ZF, BMW, Ford, Continental, GM… Aerospace Airbus, Airbus DS, Rolls-Royce, Safran, Thales, Dass
Slide 5: Appendice
APPENDICE — r an ‘ual @ i ‘ ; i | a A res | ALTEN | —+4 +
Slide 6: Breakdown of Turnover per Geographical Area (Q1-Q3 2025)
BREAKDOWN OF TURNOVER PER GEOGRAPHICAL AREA As at September 30th 2025 Q1 2025 Q2 2025 Q3 2025 Organic, excl. Organic, excl. Organic, excl. COUNTRY Published Published Published Forex effect Forex effect Forex effect FRANCE 4.2% -3.8% 3.4% -4.8% 4.3% -3.4% IBERIC 14.4% 6.7% 10.1% 3.0% 12.7% 5.7% ITAL
Slide 7: Activity at the End of September 2025 - Contact
ACTIVITY AT THE END OF SEPTEMBER 2025 comfi@alten.fr www.alten.com/fr/investisseurs Contact +33 (0)1.46.08.71.79 221 bis Boulevard Jean Jaurès 92100 Boulogne‐Billancourt Cedex 7|