Investor Presentation Q3 2020

High US-Dollar and Japanese Yen exposure FX exposure, in % FX sensitivity 10% ~ 25% Sales EBITDA unhedged ~ EUR 4.5 million 1 USD-cent change - ~ EUR 6 million - 65% - 65% 1 JPY change EUR 2.5 million - EUR 2 million Sales Costs USD SGD JPY EUR Other currency effects (mostly hedging), in EUR m 0.4 0.6 -4.2 -3.4 -7.7 Q3 2019 Q4 Q1 2020 Q2 Q3 (siltronic Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 perfect silicon solutions Comment ▸ Positive currency effect 2020 vs. 2019 ▸ Q1-Q3 2019: expense of EUR 22.8m ▸ Q1-Q3 2020: expense of EUR 2.4m 17 of 34

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