Shareholder structure as of May 27, 2021

* Shareholder Agreement between Liwet Holding AG (16.58%) and AO Compleksprom (9.31%).

The holding percentages shown above are based on the share register and the last disclosure of shareholding communicated by the shareholder to the Company and the Disclosure Office of SIX Swiss Exchange (https://www.ser-ag.com/en/resources/notifications-market-participants/significant-shareholders.html#/) (the "Disclosure Office"). For the latest and most up to date information, please refer to the disclosures made to the Disclosure Office.

IR-Contact:

Daniel Geiger
Vice President Corporate Accounting & Investor Relations
Phone: +41 (0) 41 581 4160
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Disclosure of shareholdings:

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