Kemira Oyj, Stock Exchange Release, August 21, 2025 , at 07:00 p.m. EEST

Kemira Oyj: Acquisition of own shares on 21 August 2025 Date 21 August 2025 Exchange transaction Buy Share trading code KEMIRA Amount, shares 40,000 Average price/share (EUR) 19.8165 Total cost (EUR) 792,660.00

After the acquisitions Kemira Plc holds a total of 1,869,201 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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