Regulatory press release

Kemira Oyj: Acquisition of own shares during week 20, 2026

Kemira Oyj, Stock Exchange Release, May 15, 2026 at 7.00 pm (EEST)

The acquisition of own shares is a part of the share buyback program that Kemira Oyj announced on February 12, 2026. The buyback program, which started on February 13, and will end latest on September 20, 2026, is being carried out in accordance with the Regulation (EU) No 596/2014 on market abuse and Commission Delegated Regulation (EU) 2016/1052.

Kemira Oyj has repurchased its own shares as follows between May 11 and May 15, 2026:

Date	Exhange transaction		Share trading code	Number of shares		Average price/ share (EUR)	Total transaction value (EUR)
May 11, 2026	Buy	KEMIRA		35,970	17.3497			624,067.60
May 12, 2026	Buy	KEMIRA		42,929	17.3635			745,397.26
May 13, 2026	Buy	KEMIRA		67,796	17.4130			1,180,530.10
May 14, 2026	Buy	KEMIRA		0	-			0
May 15, 2026	Buy	KEMIRA		74,791	17.3529			1,297,838.34
Total during week 20/2026	Buy	KEMIRA		221,486	17.3728			3,847,833.30

After the acquisitions Kemira Oyj holds a total of 4,309,456 treasury shares.

On behalf of Kemira Oyj

Danske Bank A/S, Finland Branch

Antti Väliaho, Jonathan Nyberg

For more information, please contact:

Kemira Oyj
Kiira Fröberg, Vice President, Investor Relations
Tel. +35840 7604258
kiira.froberg@kemira.com

Kemira is a global leader in sustainable chemistry for water-intensive industries. We operate globally and serve a wide range of customers including municipal and industrial water treatment companies and the fiber industry. Our solutions and services help secure clean water for millions of people every day and support our customers in advancing circularity and responsible resource use throughout their value chains. In 2025, Kemira's revenue totaled EUR 2.8 billion, and we employed approximately 4,900 people. Kemira's shares are listed on Nasdaq Helsinki (symbol: KEMIRA) www.kemira.com