Solvac S.A.

Notice of Dividend Amount • May 13, 2025

Press release Regulated Information

Brussels, May 13, 2025 - 7h30- CET

Solvac confirms its dividend policy and specifies the timing of the payment of its dividend.

In addition to the proposition at the agenda of the Ordinary General Meeting concerning the payment of the dividend ex. 2024, the Board of Directors confirms Solvac's dividend policy and specifies the timing for the payment of its dividend, which will apply from now onwards.

The Board confirms that the dividend policy adopted by Solvac consists in redistributing the total amount of the dividend perceived from its holdings, after deduction of its own management and financial costs. Solvac relies on a light, efficient and costs-conscious organization.

Solvac's dividend distribution is adapted to the dividend payment decisions and schedules of its holdings. Solvac's objective is to make sure its shareholders receive regular remuneration based on announced cash flows and, as far as possible, growing.

The dividend will be paid in the form of an interim payment followed by a final payment after approval by the Ordinary General Meeting:

• the Board 's policy is to settle this interim payment at 50 % of the total dividend paid during the previous year.

The Board will confirm the amount of the interim dividend ex. 2025 of €2.905 per share together with the release of its results for the first semester on August 1, 2025; this first interim dividend will be paid in September 2025.

• The balance of dividend (ex. 2025) will be announced in March 2026 together with the release of its annual results, and paid in May 2026, subject to approval of the Ordinary General Meeting and after receiving the dividends from its holdings.

Solvac is a public limited company under Belgian law founded in 1983 and listed on the Euronext Brussels stock exchange under the ISIN code BE0003545531 (SOLV). Its assets consist exclusively of a stake of more than 30% in the capital of Solvay SA and 30% in the capital of Syensqo SA. Its shares are exclusively nominative. They may be held freely by individuals or, with the approval of the Board of Directors, by legal entities or similar entities under the conditions set out in its approval policy. As of December 31, 2024, its market capitalization amounted to €2.12 billion.

For more information, we invite you to contact:

SOLVAC S.A. Investor Relations Rue des Champs Elysées, 43 B-1050 Brussels Tel.: 32 2 639 66 30 Email: Investor.relations@solvac.be