Investor Presentation FY 2020

Clear 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 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 Siltronic AG - Investor Presentation FY 2020 perfect silicon solutions March 9, 2021 9 of 32

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