Alten Sa · EURONEXT:ATE

Alten Sa — Q1 2021 Earnings Presentation

4 slides from Alten Sa's earnings presentation, Apr 26, 2021

1. Slide 1: Activity at the end of March 2021

   ALTEN Activity at the end of March 2021 Bruno Benoliel Deputy Chief Executive Officer Paris, April 26th, 2021

2. Slide 2: Breakdown of turnover per geographical area as at March 31st 2021

   BREAKDOWN OF TURNOVER PER GEOGRAPHICAL AREA AS AT MARCH 31ST 2021 YTD Change Change in Organic, excl. COUNTRY 2020 % 2021 % Published scope Forex Forex effect FRANCE 287.3 41.6% 250.8 36.8% ‐ 12.7% 2.6% 0.0% ‐ 15.3% INTERNATIONAL 402.8 58.4% 430.3 63.2% 6.8% 14.4% ‐ 2.0% ‐ 5.6% NORTH AMERICA 89.6 13

3. Slide 3: Breakdown of turnover per sector (as a % of revenue) as at March 31st 2021

   BREAKDOWN OF TURNOVER PER SECTOR (AS A % OF REVENUE) AS AT MARCH 31st 2021 Aerospace, Defense & Security Aerospace Automotive Automotive & Rail / Naval Volvo, Renault, PSA, VW, Ford, FCA, 20,8% Q1 2020 15,4% Airbus, Safran, Leonardo, Thales, Dassault Aviation, Rolls Royce… BMW, Jaguar, Land Rover, C

4. Slide 4: Contact

   ALTEN Activity at the end of March 2021 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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