Investor Presentation Q2 2023

Strong balance sheet, expected shift between cash & securities and fixed assets Balance Sheet Composition Comments Jun 30, 2023 Dec 31, 2022 Assets, in EUR mn 4,078 4,051 Fixed assets: + EUR 488 mn vs. Dec 31, 2022 Increase to EUR 2.9 bn due to high capex Fixed Assets Inventories 70% 58% 8% 7% Receivables 8% 9% Cash & Securities 14% 26% Liabilities, in EUR mn 4,078 4,051 Equity 50% 51% Provisions 5% 5% Financial Liabilities 19% 19% Liabilites & Prepayments 26% 24% Cash & Securities: - EUR 461 mn vs. Dec 31, 2022 Decline to EUR 590 mn ▸ Operating Cashflow < Payments for capex and dividend Equity Ratio: 50% ▸ Healthy level Financial Liabilities: unchanged No further drawdown in Q2 Liabilities/Prepayments: slight increase Customer Prepayments received: EUR 78 mn ► Provisions for pensions unchanged Siltronic AG- Investor Presentation Q2 2023 (siltronic perfect silicon solutions July 27, 2023 O Siltronic AG 18

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