Kemira Oyj, Stock Exchange Release, October 23, 2025, at 10:10 a.m. (EEST) Change in the Kemira Oyj's Group Leadership Team: Tuomas Mäkipeska appointed Chief Financial Officer Tuomas Mäkipeska has been appointed Chief Financial Officer and a member of Kemira's Group Leadership Team. He will start in his new role no later than in May 2026. He succeeds Kemira's current Chief Financial Officer Petri Castrén who will leave the company, as announced earlier. He joins Kemira from YIT Oyj where he has served as Chief Financial Officer and Executive Vice President & Deputy to the CEO since 2021. Prior to YIT he spent nearly 10 years at Lassila & Tikanoja Oyj in various leadership roles, among them Chief Financial Officer and Interim President & CEO, and several years at Deloitte as a management consultant. He holds a masters degree from Helsinki School of Economics. “I'm very pleased to welcome Tuomas to the team as our new Chief Financial Officer. In addition to his strong financial expertise, he brings a proven track record in leading Investor Relations, IT, and Legal, as well as solid business leadership experience. He will be a valuable asset to Kemira as we continue to execute our strategy in the years ahead,” says Antti Salminen, President & CEO of Kemira. “I'm honored to join Kemira and look very much forward to working with the team and to contribute to Kemira's strategy, growth and long-term success,” says Tuomas Mäkipeska. For more information please contact: Kemira Oyj Terhi Kivinen, Chief Communications Officer Tel. +358 40 848 4001 terhi.kivinen@kemira.com Kiira Fröberg, VP Investor Relations Tel. +358 40 760 4258 kiira.froberg@kemira.com Kemira is a global leader in sustainable chemical solutions for water-intensive industries. We deliver tailored products and services to improve the product quality, processes, and resource efficiency of our diverse range of customers. Our focus is on water treatment, as well as on fiberand renewable solutions - enabling sustainability transformation for our customers. In 2024, Kemira reported annual revenue of EUR 2.9 billion with a global team of some 4,700 colleagues. Kemira is listed on the Nasdaq Helsinki www.kemira.com