Investor Presentation FY 2020

Working capital down High trade liabilities related to capex and advisory fees Working capital, in EUR m, Working capital ratio to quarterly sales, in % 60 58 55 73 71 Inventories and contract assets, in EUR m Inventories Contract assets 167.4 169.1 175.1 169.3 175.1 218.1 168.3 179.5 188.6 200.8 Dec 19 Mar 20 Jun 20 Sep 20 Dec 20 Dec 19 Mar 20 Jun 20 Sep 20 Dec 20 Trade receivables, in EUR m Trade liabilities, in EUR m 127.7 120.6 130.6 141.3 144.5 Dec 19 Mar 20 Jun 20 Sep 20 Dec 20 -126.8 -110.2 -117.1 -92.5 -118.8 Dec 19 Mar 20 Jun 20 Sep 20 Dec 20 (siltronic Siltronic AG - Investor Presentation FY 2020 perfect silicon solutions March 9, 2021 20 of 32

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