WAF Q3 2025 Earnings Presentation

Page 1

Page 2

© Siltronic AG Q3 was the weakest quarter, driven by expected volume shift and FX Positive newsflow from AI and particular Memory underline long term growth potential 2 Q3 2025 Conference Call Presentation 2025 Guidance confirmed and specified Focused on cost and cash management, sustaining strong customer proximity KEY MESSAGES OF TODAY'S CALL

Page 3

© Siltronic AG Q3 2025 – SALES AND PROFITABILITY WEAKENED AS ANTICIPATED 3 Q3 2025 Conference Call Presentation ¹Semi market data YTD 2025 300 -8.7% vs. Q2 2025 Sales in EUR mn 90 Mainly for new fab Capex in EUR mn 21.9 Q2 2025: 26.3% EBITDA Margin in % -30 Q2 2025: EUR -83 mn Net cash flow in EUR mn EBIT in EUR mn Stable Market share1 -31 Q2 2025: EUR 24 mn © Siltronic AG

Page 4

Page 5

© Siltronic AG 1 qoq = Q3 2025 vs. Q2 2025 5 Q3 2025 Conference Call Presentation Q3 2025 FIGURES Sales o Decline driven by lower wafer area sold due to a planned shift to Q4 and negative FX effects (EUR/USD 1.17 in Q3 vs. 1.13 EUR/USD in Q2) o Slightly negative price effects EBITDA (margin) o Reduction due to decreased sales volume and ramp costs for the new fab recognized in the P&L since August o Q2 with positive contribution from spare parts valuation EBIT o Start of depreciation of the new fab in August Net income o Decrease along with EBIT n Q3 2025 Q2 2025 9M 2025 Sales 300 329 975 Gross profit -4 60 111 Gross margin, in % -1.2 18.3 11.4 EBITDA 66 86 231 EBITDA margin, in % 21.9 26.3 23.6 EBIT -31 24 7 EBIT margin, in % -10.5 7.2 0.7 Net Income -44 15 -25 Comments qoq1Profit & Loss, in EUR million

Page 6

© Siltronic AG6 Q3 2025 Conference Call Presentation 1 Sep 30, 2025 vs. Dec 31, 2024 STABLE BALANCE SHEET QUALITY Comments1 Fixed assets EUR -97 mn o Capex > depreciation, but offset by negative FX valuation effects as of the reporting date (mainly Singapore entities) Cash & Securities EUR -156 mn o Operating cash flow < Payments for capex Equity Ratio 43% o Unchanged healthy level Financial liabilities EUR +36 mn o Portion of syn loan drawn in Q2 Liabilities and Prepayments EUR -102 mn o Trade liabilities EUR -49 mn, carryover from Q4 capex o Prepayments EUR -37 mn Balance Sheet Composition, in EUR million Sep 30, 2025 Dec 31, 2024 Assets 4,855 5,084 Fixed Assets 3,759 3,856 Inventories & Contract assets 339 321 Receivables 247 241 Cash & Securities 510 666 Equities & Liabilities 4,855 5,084 Equity 2,070 2,215 Provisions 213 231 Financial Liabilities 1,560 1,524 Liabilities & Prepayments 1,012 1,114

Page 7

© Siltronic AG 1,074 1,316 523 308 923 1,199 700 340 2022 2023 2024 ytd 2025 CAPEX SIGNIFICANTLY DOWN, PAYMENTS FOR CAPEX AGAIN EXCEEDING INVEST LEVEL 7 Q3 2025 Conference Call Presentation Capex and Payments for Capex, in EUR million Payment roll-over effects to 2026 to be expected Capital expenditures Payments for capital expenditures -151 -117 +177 +32

Page 8

© Siltronic AG Interest expenses in the ballpark of EUR 50 mn expected in 2025 NET DEBT WITH ANNUAL PEAK IN Q3 2025 8 Q3 2025 Conference Call Presentation 507 634 127 127 1,550 933 734 180 664 180 1,560 844 Net debt Cash / (Net) Debt Sep 30, 2025 in EUR million Cash / (Net) Debt Dec 31, 2024 in EUR million Debt financing incl. Syn loan (not drawn) Liquidity Net debt Debt financing incl. Syn loan (not drawn) Liquidity

Page 9

Page 10

© Siltronic AG GRADUAL VOLUME RECOVERY WHILE HEADWINDS PERSIST 10 Q3 2025 Conference Call Presentation Chart not to scale, ¹USD/EUR 1.13 avg. 2025 FX Strong headwind in 2025 Prices LTAs as contracted but pricing pressure outside LTAs continues 2023 act 2024 act 2025e Sales Trend yoy Volume Price / Product Mix FX TOTAL -16 % | EUR -291 mn -7 % | EUR -101 mn - mid single digit % ~ EUR -60 mn ~ EUR -10 mn ~ EUR -50 mn1 Volume recovery driven by 300mm to persist beyond 2025

Page 11

© Siltronic AG ¹Infrastructure Telecommunications, game consoles, consumer electronics such as televisions, white goods such as refrigerators Source: Siltronic estimates; Chart not to scale WAFER CONSUMPTION 2025 UP TO 8% ON AI MOMENTUM INVENTORY HEADWINDS PERSIST BUT DECREASING 11 Q3 2025 Conference Call Presentation Growth in wafer area consumption, in % yoy Split wafer consumption by end use in 2024 Smartphones PCs Servers Industry Automotive Others1 2025 e (October) 3% 8% 23% 2% 7% 3% 8%Total w/o inventory 22% 14% 15% 14% 17% 18% 100% 2023 -2% -16% 11% 0% 17% 2% -1% 2024 8% 2% 26% -5% 7% 2% 6% Inventory impact on wafer demand

Page 12

© Siltronic AG12 Q3 2025 Conference Call Presentation Chart for illustrative purposes only. Avg H/24 is average of H1 and H2 2024. FX PRESSURE PUSHES 2025 SALES BELOW PRIOR-YEAR MAJOR IMPACT IN H2 25 Sales 2023 – 2025e, in EUR mn 1,514 1,413 2023 2024 2025 e @ 2024 FX @ 2024 FX @ 2024 FX EUR/USD 1.08 1.08 1.13 1.08 1.09 1.174 707 675 Avg H/24 H1/25 H2/25 e @ 2024 FX @ 2024 FX @ 2024 FX

Page 13

© Siltronic AG FOCUSING ON WHAT WE CAN CONTROL: CAPEX, COSTS AND CASH 13 Q3 2025 Conference Call Presentation Strict capex discipline Cost program Other cash measures Deferred capacity spend, restrictive project approvals Full-scope cost management, tackling all cost drivers From SD closure to comprehensive working capital management to dividend cuts © Siltronic AG

Page 14

© Siltronic AG CAPEX DISCIPLINE: AGAIN SIGNIFICANT REDUCTION IN 2025 14 Q3 2025 Conference Call Presentation Chart not to scale. Avg H/24 is average of H1 and H2 2024. Capex, in EUR million Investments are adapted to market environment Capex 2025 Ongoing focus on new Fab in SGP 360 – 380 138 – 158 Further reduction in H2 underlines Capex discipline 1,316 523 2023 2024 2025 e 262 222 Avg H/24 H1/25 H2/25 e

Page 15

© Siltronic AG15 Q3 2025 Conference Call Presentation ¹Figures in examples are as of Sep 30, 2025 vs. end of 2022 COMPREHENSIVE INITIATIVES TACKLE ALL COST DRIVERS ○ Continuation of our track record in successful cost reductions ○ Global, integrated cross-functional approach ○ Targeting all cost categories ○ Initiatives outlined through year-end 2026 with increasingly positive contribution to results ○ Additional fixed costs from the new fab, which are not yet sufficiently absorbed during the ramp phase ○ Capitalized before August 2025 and since then impacting P&L and margins ○ Mid-term margin burden is expected; however, decreasing as volume grows Electricity efficiency program in place with a reduction of 5%¹ Headcount Significant reduction by 10% despite ramp of new fab¹ Targeting all cost categories Cost program in place Temporary headwind from ramp cost of new 300 mm Fab

Page 16

© Siltronic AG EPIC Supplier Award Intel, April 2025 BEST in Value Award Samsung, September 2025 Best Supplier Award SSMC, September 2025 Best Carbon Reduction Partner Award TSMC, December 2024 SILTRONIC’S TECHNOLOGICAL LEADERSHIP AND EXCELLENCE RECOGNIZED WITH MULTIPLE AWARDS IN THE LAST 12 MONTHS 16 Q3 2025 Conference Call Presentation

Page 17

© Siltronic AG GUIDANCE CONFIRMED AND SPECIFIED 17 Q3 2025 Conference Call Presentation Sales Mid-single digit below 2024 EUR/USD 1.17 for H2 2025 (Previous: EUR/USD 1.15) EBITDA Margin Between 22% and 24% (Previous: 21% and 25%) Capex Between EUR 360 and 380 mn (Previous: EUR 350 and 400 mn) EBIT Significant decline Depreciation Between EUR 340 and 360 mn (Previous: EUR 340 to 400 mn) Net cash flow Significantly improved compared to previous year but still notably negative © Siltronic AG © Siltronic AG

Page 18

© Siltronic AG The information contained in this presentation is for background purposes only and is subject to amendment, revision and updating. Certain statements contained in this presentation may be statements of future expectations, future financial performance and other forward- looking statements that are based on management's current views and assumptions and involve known and unknown risks and uncertainties. In addition to statements which are forward-looking by reason of context, including without limitation, statements referring to risk limitations, operational profitability, financial strength, performance targets, profitable growth opportunities and risk adequate pricing, words such as "may”, “will”, “should”, “expects”, “plans”, “intends”, “anticipates”, “believes”, “estimates”, “predicts”, “continue”, “projects” or “seeks”, “potential”, “future”, or “further” and similar expressions may identify forward-looking statements. By their nature, forward-looking statements involve a number of risks, uncertainties and assumptions which could cause actual results or events to differ materially from those expressed or implied by the forward-looking statements. These include, among other factors, changing business or other market conditions, currency and interest fluctuations, introduction of competitive products, poor acceptance of new products and services, change of the corporate strategy and the prospects for growth anticipated by the management. These and other factors could adversely affect the outcome and financial effects of the plans and events described herein. Statements contained in this presentation regarding past trends or activities should not be taken as a representation that such trends or activities will continue in the future. Siltronic AG does not undertake and does not intent to undertake any obligation to update or revise any statements contained in this presentation, whether as a result of new information, future events or otherwise. In particular, you should not place any reliance on forward-looking statements which speak only as of the date of this presentation. Q3 2025 Conference Call Presentation Financial Calendar and Events Investor Relations Contact Stephanie Malgara investor.relations@siltronic.com Tel. +49 89 8564-3133 18 Nov 12, 2025 MKK, Munich Nov 13, 2025 MS TMT Conference, Barcelona Dec 1, 2025 Berenberg European Conference 2025, London Nov 18, 2025 BNP Paribas Exane Investor Fieldtrip, Munich Jan 19, 2026 Kepler, German Corporate Conference, Frankfurt Feb 3, 2026 Preliminary FY25 Results Mar 12, 2026 FY25 Results

Slides