Investor Presentation FY 2020

Siltronic 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 +32 1 Strong demand & 11 0 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 (siltronic Siltronic AG - Investor Presentation FY 2020 perfect silicon solutions March 9, 2021 growth Stable & attractive Mid-term decline Source: SEMI up to Jan 2021 5 of 32

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