LETTER TO SHAREHOLDERS No. 102

4 LETTER TO SHAREHOLDER No 102 2025 RESULTS 1. In local currencies, excluding major economic slowdowns and/or disposals 2. Return on capital employed 3. Indicator that measures how many years it would take the company to repay its debt with the money it earns before taxes and investments 4. Investments and acquisitions (net of disposals) 5. Of which renovation 58% and new construction 42% based on 2025 pro forma figures 6. Pro forma including recent acquisitions and disposals SHARE OF GROUP SALES The construction industry today faces many environmental and societal challenges. To meet these challenges, Saint-Gobain aims to accelerate growth in the construction sector in the nonresidential (including educational and healthcare facilities, hotels, and data centers) and infrastructure (transport, energy) segments. The Group generates approximately €15 billion in revenue in this sector, which currently has an addressable market of around €250 billion. To achieve this goal, Saint-Gobain has developed specific solutions based on differentiated and innovative flagship products that drive the entire offering. These comprehensive solutions represent a competitive advantage for the Group because they meet the needs of its customers across the entire value chain and deliver even greater sustainability and performance when combined. Saint-Gobain tailors its solutions to the needs of each segment: for healthcare facilities, for example, it offers systems designed to improve comfort in summer and provide protection against X-rays; for data centers, solutions to accelerate construction, reduce carbon footprint, optimize airflow, and enhance insulation; and for bridges and tunnels, technical waterproofing solutions, specialized additives, and repair and protective mortars. “LEAD & GROW”, SAINT-GOBAIN’S NEW STRATEGIC PLAN On October 6, 2025, Saint-Gobain presented its new strategic plan, “Lead & Grow”, which sets out its targets over the period 2026-2030. “Thanks to its successive strategic plans “Transform & Grow” in 2018, then “Grow & Impact” in 2021, the Group has built a solid foundation: closer relationships with its customers, enhanced global performance, and a position as worldwide leader in light and sustainable construction thanks to the progressive rollout of comprehensive and innovative solutions. With “Lead & Grow”, we are further elevating our trajectory for growth, profitability and value creation for our shareholders and customers”, commented Benoit Bazin, Chairman and Chief Executive Officer of Saint-Gobain. SOLUTIONS EXPANDED TO THE INFRASTRUCTURE AND NON-RESIDENTIAL MARKETS AN ATTRACTIVE FINANCIAL PLAN RESIDENTIAL5 NON-RESIDENTIAL INDUSTRY 30% 55% 54% 16% 12% 33% LONG-TERM AMBITION 2025 PRO FORMA6 BEFORE TRANSFORMATION AND INFRASTRUCTURE Accelerating construction in non-residential and infrastructure GROWTH CASH FLOW ROCE2 EBITDA MARGIN MID-SINGLE DIGIT >50% >13% 15% TO 18% AVERAGE SALES GROWTH 2026-20301 FREE CASH FLOW CONVERSION RATIO RETURN ON CAPITAL EMPLOYED SALES ROTATION RETURN TO SHAREHOLDERS GROWTH INVESTMENTS >20% ~€8bn ~€12bn ~€6bn DIVIDENDS & €2bn SHARE BUYBACKS NET DEBT/ EBITDA3 1.5x TO 2.0x

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