Investor Presentation Q2 2023

Siltronic is focused on growing 300 mm (6% in 2022) and attractive 200 mm business Development of Total Wafer Demand per Diameter, in mn 300 mm equivalents per month 9 -300 mm 8 200 mm 7 6 -SD (pol/epi) CAGR: 6.8% 5 4 3 Strong demand CAGR assumption of 6%1 Stable & attractive 2 1 0 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 Mid-term decline (siltronic Siltronic AG - Investor Presentation Q2 2023 perfect silicon solutions July 27, 2023 Source: SEMI up to Dec 2022 1) mid- and long term CAGR assumption, current 2023 market estimates below 6% 10 10

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