Investor Presentation Q3 2020

Positive cost trend per wafer area despite higher depreciation Cost of sales, in EUR m Gross profit, in EUR m / Gross margin, in % 34.6 31.8 29.8 30.7 26.1 196.1 207.4 210.8 224.0 221.0 103.7 96.9 89.3 99.1 78.2 Q3 2019 Q4 Q1 2020 Q2 Q3 Q3 2019 Q4 Q1 2020 Q2 Q3 Selling, R&D and admin expenses, in EUR m 32.7 35.2 33.5 33.4 33.6 Q3 2019 Q4 Q1 2020 Q2 Q3 Comments ▸ COGS slightly down ➤ Less FX effect than on sales q-o-q ▸ Good progress on cost savings including profitability despite higher scheduled depreciation ▸ Q3 gross margin down due to FX and negative product mix (siltronic perfect silicon solutions Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 16 of 34

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