Investor Presentation FY 2020

EBITDA burdened by strong Euro and costs relating to tender offer in Q4 EBITDA, in EUR m / EBITDA margin, in % Depreciation, in EUR m 29.6 31.1 28.1 26.8 23.6 90.0 84.2 100.4 80.1 67.2 -33.3 -30.9 -33.5 -36.5 -38.8 Q4 2019 Q1 2020 Q2 Q3 Q4 Q4 2019 Q1 2020 Q2 Q3 Q4 EBIT, in EUR m / EBIT margin, in % Comments ▸ Positive 20.7 18.6 17.8 14.6 10.0 56.7 53.3 66.9 43.6 28.4 Q4 2019 Q1 2020 Q2 Q3 Q4 Siltronic AG - Investor Presentation FY 2020 (siltronic March 9, 2021 perfect silicon solutions Prices stable q-o-q Successful cost reduction programs and productivity gains ▸ Negative Wafer area sold down due to seasonality Strong Euro in H2 Advisory costs relating to GlobalWafers' tender offer ‣ Scheduled depreciation up q-o-q 17 of 32

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