Investor Presentation Q3 2020

Environment - Efficiency as a success factor Selection of non-financial performance indicators in 2019 Raw Material Waste Recycling Silicon yield improved by 4% vs. 2018 Waste Recycling Ratio 13 CLIMATE ACTION 7 Energy AFFORDABLE AND CLEAN ENERGY Energy efficiency savings (GWh) 4.5 Occupational Safety 3 GOOD HEALTH AND WELL-BEING AND PRODUCTION in 2019 Working accidents with lost days per 1 million working hours (LTIF) 2.5 69% RESPONSIBLE 12 CONSUMPTION (siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 10 of 34

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