Morgan Stanley Increased Its Shares in Solvay

Brussels, November 12, 2025, 17:45 CET – Under Belgium's transparency laws (Law of May 2, 2007), Morgan Stanley has recently sent notifications indicating that it has surpassed the 3% threshold stake in the Solvay company.

The summary of the notifications is as follows:

Date: November 3, 2025 – Voting rights (%0.35) – Equivalent financial instruments (%2.74) – Total (%3.09)

Date: November 5, 2025 – Voting rights (%0.15) – Equivalent financial instruments (%3.07) – Total (%3.21)

The latest notification was made on November 11, 2025, and contains the following information:

Reason for Notification: Acquisition or disposal of financial instruments that carry voting rights.

Notifier: A parent holding or controlling person.

Threshold Crossing Date: November 5, 2025.

Direct Voting Rights Threshold: 3% or above.

Basic Number: 105,876,416.

Person Under Notification Obligation: Morgan Stanley, The Corporation Trust Company (DE), Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware 19801, USA.

Full information on transparency notifications and shareholding chains is available in the Investor Relations section of Solvay.

Contact

Investor Relations

Geoffroy d’Oultremont: +32 478 88 32 96

Vincent Toussaint: +33 6 74 87 85 65

Charlotte Vandevenne: +32 471 68 01 66

media.relations@solvay.com

Media Relations

Peter Boelaert: +32 479 30 91 59

Laetitia Van Minnenbruggen: +32 484 65 30 47

media.relations@solvay.com

About Solvay

Solvay is a pioneering chemical company producing sustainable solutions since 1863. Known for founder Ernest Solvay’s innovative contributions to the soda ash process, Solvay harnesses the power of chemistry to meet essential needs such as air and water purification and food safety, with approximately 9,000 employees worldwide. The company achieved €4.7 billion in net sales in 2024 and is listed on the Euronext Brussels and Paris stock exchanges (SOLB). For more information, please visit solvay.com.