solvay.com

Ruling secures critical milestone for Solvay in ongoing legal dispute with WE Soda Solvay announces that the European Patent Office (EPO) has upheld its European patent EP 3 971 138 B1 (“EP ’138”) following opposition proceedings initiated by WE Soda Ltd on February 13, 2025. The decision, issued after oral hearings on May 19, 2026, maintains the validity of the patent subject only to limited amendments. The decision may be subject to appeal.

New three-year partnership applies social credits to measure and scale improvements in people’s daily lives. Solvay and Pantys, a global Femtech apparel brand, are strengthening their collaboration through a new three-year partnership to advance menstrual health and inclusion, while scaling the use of social credits to measure social impact.

In line with Belgian transparency legislation (Law of May 2, 2007), SIH Partners, LLLP recently sent to Solvay the following transparency notification indicating that they crossed the threshold of 3%.

In line with Belgian transparency legislation (Law of May 2, 2007), SIH Partners, LLLP recently sent to Solvay the following transparency notification indicating that they crossed the threshold of 5%.

In line with Belgian transparency legislation (Law of May 2, 2007), Citigroup Inc. recently sent to Solvay the following transparency notifications indicating that they crossed the threshold of 3%.

Shareholders expressed strong support for all resolutions, with an approval rate of over 90%. Solvay helditsOrdinary General Shareholders’ Meeting in Brussels, where all resolutionsreceivedstrongshareholder support, exceeding 90% of votes, and included: The payment of a grossdividend of €2.43 per share for the year 2025. Afterdeducting the interimdividend of €0.97 gross per share, paid on 21 January 2026, the balance amounts to €1.46 gross per share, payable as from 20 May 2026.

In accordance with article 8:4 of the Royal Decree of April 29, 2019 implementing the Belgian Code on Companies and Associations, Solvay SA/NV (“Solvay” or the “Company”) (Euronext Brussels: SOLB) hereby discloses that the Company recently acquired a total of 57,000 shares of the Company on Euronext Brussels, for the purpose of meeting any delivery obligations of Solvay shares arising from grants of its 2026 long-term incentive plans.

Solvay strategy continues to demonstrate resilience Underlying net sales in Q1 2026were €997 million, -8.5% organically versus Q1 2025, reflecting soft volumes across most businesses and pricing pressures, especially in soda ash and Coatis. Underlying EBITDA was €219 million (-10.1% organically versus Q1 2025), with an EBITDA margin of 21.9%.

In line with Belgian transparency legislation (Law of May 2, 2007), Citigroup Inc. recently sent to Solvay the following transparency notifications indicating that they crossed the threshold of 3%.

Europe has solved the easy part: burning waste to generate power at scale. The hard question is only now being asked seriously: how clean, how efficient, how circular. It is a less visible conversation, driven by engineers rather than politicians, decided in industrial processes rather than policy papers. It may also be the most consequential one.