Kemira Oyj, Stock Exchange Release, September 10, 2025 , at 07:00 p.m. EEST

Kemira Oyj: Acquisition of own shares on 10 September 2025 Date 10 September 2025 Exchange transaction Buy Share trading code KEMIRA Amount, shares 39,000 Average price/share (EUR) 19.7693 Total cost (EUR) 771,002.70

After the acquisitions Kemira Plc holds a total of 2,403,980 treasury shares.

On behalf of Kemira Oyj

Danske Bank A/S, Finland Branch

Antti Väliaho Jonathan Nyberg

For more information, please contact:

Kemira Plc

Kiira Fröberg, Vice President, Investor Relations

Tel. +358 40 760 4258

kiira.froberg@kemira.com

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