Solvay S.A.: acquisition of own shares

Press release - Regulated information

Brussels, March 13, 2025, 6:00pm CEST

In accordance with article 8:4 of the Royal Decree of 29 April 2019 executing the Belgian Code of Companies and Associations, Solvay SA hereby confirms that, as announced on March 6, 2025, the Company recently acquired a total of 175,300 shares of the Company on Euronext Brussels, for the purpose of meeting any delivery obligations of Solvay shares arising from grants of its 2025 long-term incentive plans.

Date of repurchase	Number of shares	Average price paid	Max price paid	Min price paid	Total	Market
07/03/2025	4,491	33.9106	34.74	32.62	152,292.50	AQEU
07/03/2025	26,132	33.9601	34.85	32.75	887,445.33	CEUX
07/03/2025	6,083	33.8991	34.81	32.64	206,208.23	TQEX
07/03/2025	48,848	33.9985	34.85	32.61	1,660,758.73	XBRU
10/03/2025	4,661	35.1788	35.92	34.15	163,968.39	AQEU
10/03/2025	32,300	35.2931	35.94	34.15	1,139,967.13	CEUX
10/03/2025	6,274	35.2099	35.93	34.16	220,906.91	TQEX
10/03/2025	46,511	35.1925	35.94	34.16	1,636,838.37	XBRU

As of March 10, 2025, Solvay held a total of 1,416,886 shares, spread out as follows:

• 1,220,974 Solvay shares held by Solvay SA; and
• 195,912 Solvay shares held by Solvay Stock Option Management SRL ("SSOM"), a wholly owned indirect subsidiary of Solvay SA.

Contacts

Media relations	Investor relations
Peter Boelaert [phone] Laetitia Van Minnenbruggen [phone] Valérie Goutherot [phone] [e-mail] (mailto:[e-mail])	Boris Cambon-Lalanne [phone] Geoffroy d'Oultremont [phone] Vincent Toussaint [phone] [e-mail] (mailto:[e-mail])

Safe harbor

This press release may contain forward-looking information. Forward-looking statements describe expectations, plans, strategies, goals, future events or intentions. The achievement of forward-looking statements contained in this press release is subject to risks and uncertainties relating to a number of factors, including general economic factors, interest rate and foreign currency exchange rate fluctuations, changing market conditions, product competition, the nature of product development, impact of acquisitions and divestitures, restructurings, products withdrawals, regulatory approval processes, all-in scenario of R&I projects and other unusual items. Consequently, actual results or future events may differ materially from those expressed or implied by such forward-looking statements. Should known or unknown risks or uncertainties materialize, or should our assumptions prove inaccurate, actual results could vary materially from those anticipated. The Company undertakes no obligation to publicly update or revise any forward-looking statements.

About Solvay

Solvay, a pioneering chemical company with a legacy rooted in founder Ernest Solvay's pivotal innovations in the soda ash process, is dedicated to delivering essential solutions globally through its workforce of circa 9,000 employees. Since 1863, Solvay harnesses the power of chemistry to create innovative, sustainable solutions that answer the world's most essential needs such as purifying the air we breathe and the water we drink, preserving our food supplies, protecting our health and well-being, creating eco-friendly clothing, making the tires of our cars more sustainable and cleaning and protecting our homes. Solvay's unwavering commitment drives the transition to a carbon-neutral future by 2050, underscoring its dedication to sustainability and a fair and just transition. As a world-leading company with €4.7 billion in net sales in 2024, Solvay is listed on Euronext Brussels and Parisor follow Solvayon Linkedin.

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Attachment

• Press release (https://ml-eu.globenewswire.com/Resource/Download/04ba4758-35a2-4990-8798-ae11c9ed8df2)