REGULATED PRESS RELEASE

from MERSEN (EPA:MRN)

Mersen: Number of shares and voting rights as of December 31, 2025

DISCLOSURE OF TOTAL NUMBER OF VOTING RIGHTS AND NUMBER OF SHARES IN THE CAPITAL PURSUANT TO ARTICLE L-233-8-II OF FRENCH “CODE DE COMMERCE” AND 223-16 OF THE AMF GENERAL REGULATIONS

AS OF DECEMBER 31, 2025

Total number of shares24,418,312
Number of real voting rights (1)27,036,959
Theoretical number of voting rights27,109,173

(1) The number of real voting rights takes into account double voting rights, and excludes shares deprived of voting rights.

About Mersen

Mersen is a global expert in electrical power and advanced materials for high-tech industries. With more than 50 industrial sites and 21 R&D centers in more than 30 countries around the world, Mersen develops customized solutions and delivers key products to its clients in order to meet the new technological challenges shaping tomorrow’s world.

The Group is listed on Euronext Paris – Compartment B
Bloomberg ticker: MRN.FP – Reuters ticker: CBLP.PA

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