#1siltronic perfect silicon solutions Siltronic AG Investor Presentation - Q3 2020 October 29, 2020 Siltronic AG#2Increasing demand for electronic devices and new applications drive semiconductor growth, which in turn fuels silicon demand Electronics value chain 2019 Electronics USD 1,680 bn Semiconductors USD 400 bn Semiconductor silicon wafers USD 11.2 bn Silicon for electronic applications USD 1.1 bn siltronic perfect silicon solutions Source: Electronics (IC Insights), Semiconductors (WSTS, only silicon-based), Silicon wafers (SEMI SMG), Electronic applications (estimate) (siltronic Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 perfect silicon solutions. 2 of 34#3Siltronic has a relevant global market share... Top 5 wafer producers serve more than 90% of market across all diameters 25% 12% 17% 13% 33% SK Siltron Siltronic ■Shin Etsu ■Sumco ■GlobalWafers (siltronic Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 perfect silicon solutions. (siltronic perfect silicon solutions Sources: reported company revenues Q1 2020, converted to USD million 3 of 34#4and an international manufacturing network United States Freiberg CP* 300 mm Germany Portland 200 mm ► Central R&D hub in Burghausen ► High volume facilities for 300 mm in Germany and Singapore ► Among world's newest & largest fabs in Singapore *CP = Crystal Pulling | *SD = 150 mm and smaller (siltronic Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 perfect silicon solutions Burghausen CP* 300 mm SD* SSW CP* 300 mm SSP 200 mm Singapore 4 of 34#5Siltronic is focused on growing 300 mm and attractive 200 mm business. Development of Total Wafer Demand per Diameter, in mn 300 mm equivalents per month 7 -300 mm -200 mm-SD (pol/epi) 6 5 4 63 2 1 Strong demand & 11 growth Stable & attractive Mid-term decline 0 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Source: SEMI up to Sep 2020 (siltronic Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 perfect silicon solutions. 5 of 34#6Cost-competitiveness a pre-requisite Major cost items Cost development 2020 ‣ Labour ▸ Supplies ▸ Depreciation ► Polysilicon ▸ Energy + DO (siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 COLA (cost of living adjustment) ► Productivity improvement Supply savings ▸ Recycling ▸ Energy efficiency Lower success sharing Automation Freight Costs Unit cost increase Cost roadmaps 6 of 34#7Overview Financials Adjusted financial figures Q1-Q3 2016 2017 2018 2019 (EUR million) 2020 Sales 933.4 1,177.3 1,456.7 1,270.4 922.5 EBIT 27.0 235.7 497.7 298.3 163.8 EBIT margin in % 2.9 20.0 34.2 23.5 17.8 EBITDA 146.0 353.1 589.3 408.7 264.8 EBITDA margin in % 15.6 30.0 40.5 32.2 28.7 Earnings per share 0.40 6.18 12.44 7.52 4.19 Capex 88.8 123.2 256.9 363.0 129.4 Free cash flow 1 19.0 169.6 416.4 36.4 47.3 Net cash flow 1 39.6 124.8 240.4 81.3 96.3 Dividend 75.0 150.0 90.0 1 In 2018, Siltronic started reporting the key figure,,net cash flow" instead of „,free cash flow". Net cash flow represents free cash flow without the time shifts created by inflow and return of customer prepayments which, due to the size, impairs the meaningfulness of free cash flow. (siltronic Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 perfect silicon solutions 7 of 34#8Creating value for all stakeholders ... its customers and suppliers ▸ Quality & Innovation Technology leadership ▸ Customer service its employees Siltronic offers ... its shareholders Long-term value enhancement ▸ Attractive return ▸ On-going cost reduction. the environment and society ▸ Occupational health & safety ▸ Human Resources Development ▸ Equality ▸ Conservation of resources & recycling ▸ Compliance & Human Rights ‣ Social commitment siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 8 of 34#9Clear commitment to sustainability Sustainability at Siltronic AG ▸ Claim: We understand sustainability not only as responsible action, but also want to generate competitive advantages through our sustainable actions. ▸ Strategy: We plan resource-saving right from the start, based on product and production safety as well as health and environmental protection. ▸ Voluntary commitments: We follow the principles of the Responsible Business Alliance (RBA) and Responsible Care initiatives and the United Nations Global Compact. ‣ Goal: We want to reconcile the effects of our business activities with the expectations and needs of society. CDP: Siltronic has been evaluated by CDP since 2018; current evaluation results CDP Climate Change "B | Management" and Water Security "B- | Management" ISS-oekom: Siltronic has been evaluated by ISS-oekom since 2017. With the "Prime" rating, Siltronic is one of the leading companies in the semiconductor industry in the area of sustainability. SUSTAINABLE DEVELOPMENT GOALS UMWELT ALLIANZ SACHSEN natürlich wirtschaftlich Responsible Business Alliance Formerly the Electronic Industry Citizenship Coalition Advancing Sustainability Globally GLOBAL COMPACT WE SUPPORT CDP Corporate Responsibility Prime rated by ISS-oekom➤ (siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 9 of 34#10Environment - Efficiency as a success factor Selection of non-financial performance indicators in 2019 Raw Material Waste Recycling Silicon yield improved by 4% vs. 2018 Waste Recycling Ratio 13 CLIMATE ACTION 7 Energy AFFORDABLE AND CLEAN ENERGY Energy efficiency savings (GWh) 4.5 Occupational Safety 3 GOOD HEALTH AND WELL-BEING AND PRODUCTION in 2019 Working accidents with lost days per 1 million working hours (LTIF) 2.5 69% RESPONSIBLE 12 CONSUMPTION (siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 10 of 34#11CSR targets until 2030 Consistently sustainable action secures long-term competitive advantages for Siltronic NO 1 POVERTY (siltronic ZERO HUNGER SSS SODDHEALTH AND WELL-BEING QUALITY EDUCATION GENDER EQUALITY 6 AND SANITATION GLEAN WATER AFFORDABLE AND CLEAN ENERGY DECENT WORK AND ECONOMIC GROWTH INDUSTRY, INNOVATION AND INFRASTRUCTURE Reduce specific greenhouse gas emissions by 20%1 Reduce specific energy consumption by 20%1 Reduce specific water consumption by 20%1 Increase water recycling by 25%¹ Increase waste recycling by 25%¹ REDUCED SUSTAINABLE CITIES INEQUALITIES AND COMMUNITIES 12 CONSUMPTION RESPONSIBLE 13 CLIMATE LIFE ACTION BELOW WATER 15 FE ON LAND 16 PEACE, JUSTICE PARTNERSHIPS AND PRODUCTION AND STRONG INSTITUTIONS FOR THE GOALS perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 1 base value 2015 11 of 34#12Investor structure well diversified with a strong anchor shareholder 100 % 42.2 % 57.8 % 69.2 % Identified free float by region (as of August 2020) 24% 30% 11% 35% ■USA UK ■Germany Other Significant notifications of voting rights (as of October 27, 2020) 30.8 % Allianz Global Investors 5.13% State of Norway 4.93% BlackRock 3.85% pre-IPO post IPO since March 15, 2017 Goldman Sachs 3.62% Wacker Chemie AG Free Float DWS 3.23% Capital Group 3.01% (siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 12 of 34#13Siltronic strategy - capitalize on market opportunities while focusing on 300 mm & technological leadership Optimize returns, stay ahead in technology and grow with the market Strategic Focus Grow with the market Ensure technology & Improve financial performance quality leadership & cash flow Execute cost reduction roadmaps & debottlenecking concepts We continuously increase the value for our stakeholders by providing best-in-class wafers at competitive costs. (siltronic Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 perfect silicon solutions 13 of 34#14FINANCIALS Q3 2020 Siltronic AG#15Q3 sales down due to FX and product mix Sales, in EUR m Ø FX rates Q3/19 Q4 Q1/20 Q2 Q3 323.1 299.8 304.3 300.1 299.2 Q3 2019 Q4 Q1 2020 Q2 Q3 (siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 EUR/USD 1.11 1.11 1.10 1.10 1.17 EUR/JPY 119 120 120 118 124 Comments ▸ Wafer area up q-o-q and y-o-y ▸ Flattish price trend q-o-q ▸ Strong headwind from: ▸ EUR strength (negative EUR 16m impact q-o-q) ▸ Negative impact from product mix in Q3 ▸ ASP down y-o-y, stable q-o-q 15 of 34#16Positive cost trend per wafer area despite higher depreciation Cost of sales, in EUR m Gross profit, in EUR m / Gross margin, in % 34.6 31.8 29.8 30.7 26.1 196.1 207.4 210.8 224.0 221.0 103.7 96.9 89.3 99.1 78.2 Q3 2019 Q4 Q1 2020 Q2 Q3 Q3 2019 Q4 Q1 2020 Q2 Q3 Selling, R&D and admin expenses, in EUR m 32.7 35.2 33.5 33.4 33.6 Q3 2019 Q4 Q1 2020 Q2 Q3 Comments ▸ COGS slightly down ➤ Less FX effect than on sales q-o-q ▸ Good progress on cost savings including profitability despite higher scheduled depreciation ▸ Q3 gross margin down due to FX and negative product mix (siltronic perfect silicon solutions Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 16 of 34#17High 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#18Strong Euro and change in product mix negative for earnings EBITDA, in EUR m / EBITDA margin, in % Depreciation, in EUR m 30.5 29.6 31.1 28.1 26.8 91.5 90.0 84.2 100.4 80.1 Q3 2019 Q4 Q1 2020 Q2 Q3 -27.9 Q3 2019 -33.3 -30.9 -33.5 -36.5 Q4 Q1 2020 Q2 Q3 EBIT, in EUR m / EBIT margin, in % Comments 21.2 20.7 18.6 17.8 14.6 63.6 56.7 66.9 53.3 43.6 Q3 2019 Q4 Q1 2020 Q2 Q3 (siltronic Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 perfect silicon solutions. Strong headwind from EUR strength Negative impact from product mix in Q3 ▸ Depreciation increased as scheduled q-o-q 18 of 34#19Net profit of EUR 39 million Net profit, in EUR m EPS, in EUR 59.5 60.8 1.65 1.80 45.4 46.0 39.1 1.21 1.32 1.08 Q3 2019 Q4 Q1 2020 Q2 Q3 Q3 2019 Q4 Q1 2020 Q2 Q3 Dividend payment, in EUR m 0 150 90 75 FY 2017 FY 2018 FY 2019 FY 2020 (siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 Comments ▸ Net profit of EUR 39m in Q3 ‣ Q3 tax rate of 9% ► Q1-Q3 tax rate down from 12% to 8% y-o-y 19 of 34#20Working capital significantly up due to higher trade receivables and lower trade liabilities Working capital, in EUR m Inventories and contract assets, in EUR m Working capital ratio to quarterly sales, in % Inventories Contract assets 73 69 60 58 55 19.2 14.6 14.6 14.2 15.2 207.0 218.1 168.3 179.6 188.6 164.6 152.8 154.6 160.9 154.1 Sep 19 Dec 19 Mar 20 Jun 20 Sep 20 Sep 19 Dec 19 Mar 20 Jun 20 Sep 20 Trade receivables, in EUR m Trade liabilities, in EUR m 135.7 127.7 120.6 130.6 141.3 Sep 19 Dec 19 Mar 20 Jun 20 Sep 20 -112.5 -126.8 -110.2 -117.1 -92.5 Sep 19 Dec 19 Mar 20 Jun 20 Sep 20 Siltronic AG - Investor Presentation Q3 2020 (siltronic October 29, 2020 perfect silicon solutions. 20 of 34#21Equity decreased due to dividend payment and higher interest- related pension obligations Equity, in EUR m Equity ratio, in % Provisions for pensions, Net financial assets, in EUR m in EUR m 42.4 47.8 52.8 45.4 43.7 Interest rates IFRS USA 2.99% 2.98% 1,24% 1.92% Germany 0.97% 2.88% 2.46% 2.41% 1.23% 0.95% 1.031 930 867 809 833 606 566 552 579 589 588 492 509 519 411 Sep 19 Dec 19 Mar Jun 20 20 Sep Sep Dec Mar Jun Sep Sep Dec Mar Jun Sep 20 19 19 20 20 20 19 19 20 20 20 (siltronic Siltronic AG - Investor Presentation Q3 2020 perfect silicon solutions. October 29, 2020 21 of 34#22Pension reserves up due to lowest IFRS interest rate in Germany in Siltronic history DBO and pension reserves, in EUR m 1,256 -870 650 USA mostly funded 146 2.41% 136 3% 104 Germany unfunded 214 0.95% 150 3% 33 Funded through Wacker 0.95% 3% Pension Fund 896 585 513 (siltronic Comment ▸ DBO of EUR 1,256m ./. assets of EUR 650m = EUR 606m ▸ Pension reserves @3% = DBO of EUR ~870m ./. assets EUR 650m = EUR-220m ▸ IFRS interest uses bond yields only; assets include bonds, equity, real estate + derivatives ▸ Wacker pension fund ▸ fully funded under German pension fund regulations using 3.54% interest rate ▸ asset liability study: probability of return in next 20 years: ≥3.75% 56% ≥3.0% 80% DBO Sept, 2020 DBO @3% Assets Sept, ≥2.5% 91% 2020 Siltronic AG - Investor Presentation Q3 2020 perfect silicon solutions October 29, 2020 22 of 34#23Capex 2020 significantly down vs. 2019 Investment, in EUR m 96.4 88.6 46.0 48.3 35.1 Q3 2019 Q4 Q1 2020 Q2 Q3 Siltronic AG - Investor Presentation Q3 2020 (siltronic October 29, 2020 perfect silicon solutions. Comment Q1 included some roll-over from 2019 projects ▸ Planned capability and capacity expansion. projects should be mostly completed by year- end Epi expansion in H2 to accommodate demand and market growth 23 of 34#24Net cash flow clearly positive Operating cash flow (OCF), in EUR m Customer prepayments net (PP), in EUR m 74.4 100.7 85.6 58.6 60.9 Q4 Q1 2020 Q2 Q3 Q3 2019 CF Capex, in EUR m 3.6 |-10.5 -15.5 -21.6 -16.9 Q3 2019 Q4 Q1 2020 Q2 Q3 Net cash flow (NCF), in EUR m 8.9 40.9 26.7 28.6 -66.3 -48.8 -42.8 -8.8 -98.7 -88.2 Q3 2019 Q4 Q1 2020 Q2 Q3 Q3 2019 Q4 NCF= OCF-PP+CF Capex Q1 2020 Q2 Q3 (siltronic Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 perfect silicon solutions 24 of 34#25OUTLOOK Siltronic AG#26Siltronic Outlook 2020 (as of July 21, 2020) - unchanged Sales - mid-single digit %-range below 2019 with a slight sequential decrease in H2 vs. H1 EBITDA margin - mid-single digit percentage points below 2019 Depreciation EBIT around EUR 140m significantly below 2019 due to higher depreciation Tax rate below 10% Capex around EUR 200m Net cash flow slightly below 2019 Earnings per share (siltronic perfect silicon solutions - significantly below 2019 Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 26 of 34#27Positive development of wafer volume in Q4 2020 300 mm Strong foundry and logic business Uncertainty due to US-China trade tensions might lead to elevated inventories Digestion of server components 200 mm SD - - High exposure to automotive and industry where end markets are mixed Assume some inventory digestion Some recovery from a low base (siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 27 of 34#28What to expect in the short-term and medium-term Short-term development ▸ Foundry and logic business to stay strong ► In memory, server-related inventories seem to be in a digestion phase ▸ Smartphones should see a recovery driven by 5G ▸ Server market seems to be softening ▸ Demand from automotive industry in recovery mode but under Corona uncertainty Mid-term growth drivers for wafer volumes intact ▸ Smartphone recovery and content growth intact ▸ Notebooks and Chromebooks stronger driver for PC growth than desktop PCs ▸ Server market more driven by cloud servers with higher silicon content ▸ Auto units expected to recover with higher silicon content (ADAS) and more xEV (siltronic Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 perfect silicon solutions. 28 of 34#29APPENDIX Siltronic AG#30Production process - ingot growing (siltronic perfect silicon solutions. Polycristalline Silicon Quartz Crucible Silicon Melt Seed Crystal Quartz Crucible Resistivity Heater Polycristalline Silicon 1 Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 Induction Coil Monocrystal 2 3 Ingot Section Grinding Wheel 4 1 Raw Material 2 Czochralski Pulling 3 Float Zone Pulling 4 Ingot Grinding 30 of 34#31Production process - wafering Mounted Ingot Slurry Nozzle Wire Web- Wire Guide Rollers Silicon Wafer Lamp Heating Edge Rounding Wheel As Sawn Wafer Resistivity Vendor Identification Number - 5 Grinding- Chuck Process Gas Flow Susceptor 11 12 (siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 9 Carrier Plate Polishing Pad Polishing Platen 76087354WA15.58163 Dopant Crystal Orientation Check-Characters Cleaning Bath - Etch Bath 7 10 9 Dryer Upper and Lower Lapping Plate 5 Multi Wire Slicing 6 Edge Rounding 7 Laser Marking 8 Lapping Silicon Wafer Lapping Carrier 80 9 Cleaning and Etching 10 Polishing 11 Epitaxy [optional] 12 Wafer 31 of 34#32Contact and Additional Information Issuer and Contact Siltronic AG Hanns-Seidel-Platz 4 D-81737 München Investor Relations: Petra Mueller email: [email protected] Tel. +49 89 8564-3133 Financial Calendar 2020 Preliminary Figures FY 2020 January 29, 2021 (siltronic perfect silicon solutions. Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 Additional Information ISIN: DE000WAF3001 WKN: WAF300 Deutsche Börse: Listing: WAF Frankfurt Stock Exchange Prime Standard DEUTSCHE BÖRSE PRIME STANDARD MDAX TecDAX Corporate Responsibility rated by Prime ISS-oekom 32 of 34#33Disclaimer 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. (siltronic perfect silicon solutions Siltronic AG - Investor Presentation Q3 2020 October 29, 2020 33 of 34#34siltronic perfect silicon solutions SILTRONIC AG Hanns-Seidel-Platz 4 81737 Munich Germany Siltronic AG