Alten Sa · EURONEXT:ATE

Alten Sa — Q1 2023 Earnings Presentation

4 slides from Alten Sa's earnings presentation, Apr 26, 2023

1. Slide 1: Activity at the end of March 2023

   ALTEN Activity at the end of March 2023 Bruno Benoliel Deputy Chief Executive Officer Paris, April 26th, 2023

2. Slide 2: Breakdown of turnover per sector as at March 31st 2023

   BREAKDOWN OF TURNOVER PER SECTOR (AS A % OF REVENUE) AS AT MARCH 31ST 2023 Automotive & Rail 20.6 % Market trend Rail Aerospace, Defense, Alstom‐Bombardier, Automotive Siemens… Stellantis, Volkswagen, Renault, Volvo, Security & Naval ZF, BMW, Ford, Continental, GM… Aerospace 20.2 % Airbus, Airbus DS

3. Slide 3: Breakdown of turnover per geographical area as at March 31st 2023

   BREAKDOWN OF TURNOVER PER GEOGRAPHICAL AREA AS AT MARCH 31ST 2023 YTD Change Change in Organic, excl. COUNTRY 2022 % 2023 % Published scope Forex Forex effect FRANCE 298.2 33.3% 334.4 32.3% 12.2% 0.0% 0.0% 12.2% IBERIC 76.8 8.6% 94.2 9.1% 22.7% 2.8% 0.0% 20.0% GERMANY 75.0 8.4% 93.4 9.0% 24.5% 6.2%

4. Slide 4: Contact

   ALTEN Activity at the end of March 2023 Contact comfi@alten.fr https://www.alten.com/fr/investisseurs/ T : +33 (0)1.46.08.71.79 40 av. André Morizet 92513 Boulogne‐Billancourt Cedex

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