8 LETTER TO SHAREHOLDERS N°101 SHAREHOLDER’S NOTEBOOK SHAREHOLDER’S NOTEBOOK Recent performance at 08/06/2025 (%) Saint-Gobain share CAC 40 Performance since 01/01/2021 149.3% 37.5% Performance since 01/01/2024 40.3% +1.2% — (1) Saint-Gobain share — CAC 40 TOTAL NUMBER OF SHARES (at June 30, 2025) ~496 million OWNERSHIP STRUCTURE (at June 30, 2025 – %, estimated) SAINT-GOBAIN SHARE PERFORMANCE €93.5(1) 08/06/2025 High: €105.9(1) 03/06/2025 SIGN UP FOR THE E-LETTER TO SHAREHOLDERS To receive your copy of the Letter to Shareholders and keep abreast of all the latest Saint-Gobain news, sign up for the e-Letter to Shareholders, in the Shareholders section of www.saint-gobain.com or send an e-mail to actionnaires@saint-gobain.com. YOUR CONTACTS Saint-Gobain’s Shareholder Relations Department will be pleased to answer any enquiries. Please feel free to contact them: • By dialing: (from France) 0 800 32 33 33 or +33 1 88 54 05 05 (from outside France) • Online, at: www.saint-gobain.com • By e-mail, at: actionnaires@saint-gobain.com Managing Editor: Vivien Dardel Manager, Individual Shareholders: Blandine Ruesch ISSN No. 1245-3978 Design: Cédric Bertandeau Photo credits: Saint-Gobain photo library • Via the Saint-Gobain Shareholder App • By post: Saint-Gobain Service Actionnaires Tour Saint-Gobain 12 place de l’Iris 92096 La Défense Cedex France 8.0% Group Savings Plan (employee shareholders) 37.0% Institutional investors: Americas-Asia 14.1% Institutional investors: France 8.3% Private shareholders 32.1% Institutional investors: Other Europe 0.5% Treasury shares DATES FOR YOUR DIARY FINANCIAL AGENDA Sales for the third quarter of 2025: October 30, 2025, after close of trading on the Paris stock exchange D DOCUMENTATION (ONLINE) Sustainable Construction magazine Universal Registration Document 2024 FROM 01/01/2021 TO 08/06/2025
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