Shareholder structure as of December 31, 2021

* Shareholder Agreement between Liwet Holding AG and AO Kompleksprom

The holding percentages shown above are based on 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:

Burkhard Wagner
Vice President Corporate Finance & Investor Relations
Phone: +41 (0) 41 581 4180
ir(at)swisssteelgroup.com

Disclosure of shareholdings:

Offenlegung(at)swisssteelgroup.com