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Investor Presentaiton

Net cash flow significantly negative due to ongoing invest projects Operating cash flow (OCF), in EUR mn including prepayments Prepayments net (PP), in EUR mn 273.7 92.6 100.5 88.5 197.0 191.1 189.8 150.0 Q4 2021 Q1 2022 Q2 2022 Q3 2022 Q4 2022 CF Capex, in EUR mn -9.8 98.2 Q4 2021 Q1 2022 Q2 2022 Q3 2022 Q4 2022 Net cash flow (NCF), in EUR mn excluding prepayments 36.9 -136.3 -63.6 -139.6 -123.4 -244.0 -226.0 -223.4 -245.4 -337.0 Q4 2021 Q1 2022 Q2 2022 Q3 2022 Q4 2022 Siltronic AG - Investor Presentation FY 2022 (siltronic March 9, 2023 perfect silicon solutions Q4 2021 Q1 2022 Q2 2022 Q3 2022 Q4 2022 NCF= OCF-PP+CF Capex O Siltronic AG 29

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