Compagnie de Saint-Gobain

Transaction in Own Shares • Oct 13, 2025

October 13, 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 7 to October 10, 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)
2025-10-07	272,974	90.870	24,805,147	XPAR/CEUX/TQEX/AQEU
2025-10-08	47,000	89.891	4,224,886	XPAR/CEUX/TQEX/AQEU
2025-10-09	3,133	89.975	281,893	XPAR/CEUX/TQEX/AQEU
2025-10-10	82,100	89.433	7,342,458	XPAR/CEUX/TQEX/AQEU
Total over the period	405,207	90.458	36,654,384