REGULATED PRESS RELEASE

from SAINT-GOBAIN (EPA:SGO)

Reporting on share buyback transactions carried out between March 2 and March 6, 2026

March 9, 2026

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 March 2 to March 6, 2026

Issuer: Compagnie de Saint-Gobain

Security type: SHARES - ISIN Code : FR0000125007

Transaction dateTotal daily volume
(number of shares
bought back)
Daily weighted
average purchase
price
Amount (in euros)Market (MIC Code)
2026-03-02345,95882.59028,572,810XPAR/CEUX/TQEX/AQEU
2026-03-03381,93578.96130,158,046XPAR/CEUX/TQEX/AQEU
2026-03-04403,10078.11031,486,020XPAR/CEUX/TQEX/AQEU
2026-03-05325,61276.41524,881,674XPAR/CEUX/TQEX/AQEU
2026-03-06406,68974.83530,434,734XPAR/CEUX/TQEX/AQEU
Total over the period1,863,29478.105145,533,283
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