NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN WHOLE OR IN PART IN, INTO OR FROM ANY JURISDICTION WHERE TO DO SO WOULD CONSTITUTE A VIOLATION OF THE RELEVANT LAWS OR REGULATIONS OF SUCH JURISDICTION.

NOTICE OF INTENTION TO DELIST FROM THE LONDON STOCK EXCHANGE

6 January 2026

Compagnie de Saint-Gobain S.A. (LSE: COD; Euronext Paris: SGO) (the "Company") refers to its ordinary shares (ISIN: FR0000125007) (the "Shares"), which are admitted to listing on the equity shares (international commercial companies secondary listing) category of the Official List of the Financial Conduct Authority (the "FCA") and to trading on the main market for listed securities of the London Stock Exchange (the "LSE"), trading and settling as CREST Depository Interests representing Shares ("CDIs").

The Company has reviewed its listing venues. As part of this review, the Company has considered, amongst other things, the low trading volumes related to its secondary listing in London. Following this review, the Company hereby gives notice that it plans to request that (i) the FCA cancel the listing of the Shares on the equity shares (international commercial companies secondary listing) category of the Official List of the FCA, and (ii) the LSE cancel the admission to trading of the Shares on the main market for listed securities of the LSE (collectively, the "LSE Delisting").

In accordance with UK Listing Rule 21.2.17R, the Company is required to give at least 20 business days' notice of the intended voluntary LSE Delisting. It is intended that the LSE Delisting will become effective from 8:00 a.m. on 10 February 2026, such that the last date of trading of the Shares on the LSE will be 9 February 2026.

Following the LSE Delisting, (i) it will no longer be possible to trade Shares on the LSE, and (ii) the Company will maintain the primary listing of its Shares on Euronext Paris. The LSE Delisting is expected to have no impact for shareholders who hold their Shares on Euronext Paris.

Shareholders who hold CDIs are urged to consult their own investment advisers and brokers on the actions that can be taken in respect of their holdings of CDIs, including the necessary steps and actions required to convert their holdings of CDIs into holdings of Shares that can be traded directly on Euronext Paris.

As the Company is assigned to the equity shares (international commercial companies secondary listing) category of the Official List of the FCA, no shareholder approval is required for the LSE Delisting.

For further information please contact:

Saint-Gobain Investor Relations

Email: Saint-GobainInvestorRelations@saint-gobain.com 

Important notice

This announcement is not intended to, and does not, constitute or form part of any offer, invitation or the solicitation of an offer to purchase, otherwise acquire, subscribe for, sell or otherwise dispose of, any securities whether pursuant to this announcement or otherwise.