LETTER TO SHAREHOLDERS No 103

5 LETTER TO SHAREHOLDER No 103 H1 2026 RESULTS 1. Capital Markets Day, October 6, 2025 2. 2025 sales 3. In local currencies in first-half 2026 The Group is already involved in flagship projects such as the Pune metro and the Mumbai-Ahmedabad high-speed rail corridor. It is also contributing to new developments, particularly in the airport sector, with Saint-Gobain solutions being used in the construction of Navi Mumbai International Airport, for example. Meanwhile, the Oragadam site, located near Chennai and currently under development, is set to become the Group’s largest industrial platform worldwide, bringing together multiple production lines for glass, mineral wool insulation, plasterboard, mortars, and acoustic ceilings on a single site. - Second, Saint-Gobain is a recognized leader in sustainability in India. 70% of India’s green buildings use the Group’s solutions. Saint-Gobain was the first company in Asia to launch low-carbon glass at its Chennai plant and to adopt biomassbased energy sources at its Vizag facility in Andhra Pradesh. In addition, the Group’s energy-efficient building solutions significantly reduce energy consumption and carbon emissions. - Third, after more than 40 years in India, Saint-Gobain has built a strong industrial footprint, with 82 production sites across the country, a state-of-the-art Research & Development center on the Chennai Institute of Technology campus employing around 300 researchers, and more than 22 new plants built since 2019. Supported by Accroître l’exposition aux pays à forte croissance structurelle this extensive industrial presence and strategic acquisitions such as UP Twiga (glass wool, 2022), Rockwool India Pvt Ltd. (stone wool, 2023), and FOSROC (construction chemicals, 2025), the Group’s business in India has already quadrupled over the past decade, reaching €1.7 billion in sales in 2025 and an EBITDA margin exceeding 20%. The Group now intends to build on this momentum. “We have doubled our size in India every five years, and the goal is to triple our size in the next ten years,” says Benoit Bazin. The announced €1 billion investment will focus on several priorities: building new plants, strengthening research & development, expanding digital capabilities, and pursuing targeted acquisitions in building materials to support sustainable construction. In addition, the Group aims to roughly triple its number of retail outlets, further develop its distribution network – which currently includes 21,500 points of sale1, and expand its partnership ecosystem by approximately doubling the number of key industry influencers1 by 2030. By investing in India, Saint-Gobain is continuing its strategy of strengthening its market position and increasing its exposure to highgrowth regions, particularly North America, Asia and emerging markets. These regions are expected, over time, to account for close to 60% of the Group’s sales, compared with more than 50% today, pro forma for recent changes in scope.

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