Brussels - According to the Belgian transparency legislation in force (Law of May 2, 2007), SOLVAC SA (Rue des Champs Elysees 43 - 1050 Brussels - Belgium) has been notified by SSOM, an affiliate of Solvay SA, that it has crossed downwards the statutory declaration threshold of 3% of the existing voting rights emitted by Solvay SA, with a total of 2.99% (2.27% of direct voting rights + 0.72% of other financial instruments). Solvac SA has notified Solvay SA that, on March 19, 2021 the combined holding by Solvac and SSOM reached 33.80% of the existing voting rights. Shares held by SSOM are held as part of the Group's strategy to hedge the plan linked to stock options granted to senior executives of the Group.

The notification, dated March 24, 2021, contains the following information:

Reason for the notification: acquisition or disposal of voting securities or voting rights

Notified by: Solvac SA (Rue des Champs Elysees 43 - 1050 Brussels - Belgium)

Date on which the threshold is crossed: March 19, 2021

Threshold of direct voting rights crossed: 3% downwards

Denominator: 105,876,416

Transparency notifications and the full chain of controlled undertakings through which the holding is effectively held is available on the Investor Relations Section of Solvay's website.

About Solvay

Solvay is a science company whose technologies bring benefits to many aspects of daily life. With more than 23,000 employees in 64 countries, Solvay bonds people, ideas and elements to reinvent progress. The Group seeks to create sustainable shared value for all, notably through its Solvay One Planet plan crafted around three pillars: protecting the climate, preserving resources and fostering better life. The Group's innovative solutions contribute to safer, cleaner, and more sustainable products found in homes, food and consumer goods, planes, cars, batteries, smart devices, health care applications, water and air purification systems. Founded in 1863, Solvay today ranks among the world's top three companies for the vast majority of its activities and delivered net sales of EUR9 billion in 2020. Solvay is listed on Euronext Brussels (SOLB) and Paris and in the United States, where its shares (SOLVY) are traded through a Level I ADR program. Learn more at www.solvay.com.

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