Compagnie de Saint-Gobain

Transaction in Own Shares • Oct 20, 2025

October 20, 2025

Reporting on share buyback transactions carried out in accordance with Article 5 §2 of Regulation (EU) No 596/2014 of April 16, 2014 on market abuse

Share buyback program authorized by the Annual General Meeting of June 5, 2025 (16th resolution)

In accordance with applicable regulations, Compagnie de Saint-Gobain announces having carried out the following share buyback transactions in accordance with Article 5 §2 of Regulation (EU) No 596/2014 from October 13 to October 17, 2025

Issuer: Compagnie de Saint-Gobain

Security type: SHARES - ISIN Code : FR0000125007

Transaction date	Total daily volume (number of shares bought back)	Daily weighted average purchase price	Amount (in euros)	Market (MIC Code)
2025-10-13	63,200	88.696	5,605,606	XPAR/CEUX/TQEX/AQEU
2025-10-14	232,028	88.554	20,546,891	XPAR/CEUX/TQEX/AQEU
2025-10-16	58,908	89.758	5,287,470	XPAR/CEUX/TQEX/AQEU
2025-10-17	160,295	89.336	14,320,146	XPAR/CEUX/TQEX/AQEU
Total over the period	514,431	88.953	45,760,114