Kemira Investor Presentation

Industry & Water: Strong margin improvement Market environment in Q1 2023 REVENUE AND ORGANIC REVENUE GROWTH (Y-ON-Y) EUR million 435 412 402 374 Water treatment: solid demand in municipal water treatment, softness in industrial demand 322 301 298 279 237 • Oil & Gas: market continued to grow Organic growth Q1 2023: +24% • Organic growth driven by higher sales prices. Sales volumes increased in Oil & Gas, water treatment sales volumes declined. • Revenue in water treatment increased by +19%, in Oil & Gas by +45% Record-high operative EBITDA • • Operative EBITDA margin improved to 20.7% following higher sales prices Considerable margin improvement in Oil & Gas -7% 28% 23% 23% 31% 26% 33% 32% 24% Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 2021 2022 2023 OPERATIVE EBITDA AND OPERATIVE EBITDA -% EUR million 83.3 66.1 60.3 41.7 49.5 17.6% 17.7% 17.4% 52.3 48.8 48.5 37.3 20.7% 15.2% 16.1% 13.0% 13.9% 12.5% Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 *CEOR= chemical enhanced oil recocery 2021 2022 Q1 2023 Kemira APRIL 25, 2023 INVESTOR PRESENTATION 60

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