PRESS RELEASE

MERSEN: 2026 PROVISIONAL FINANCIAL CALENDAR
PARIS, NOVEMBER 25TH, 2025 – Mersen (Euronext FR0000039620 – MRN), a global expert in electrical power and advanced materials, announces its provisional calendar for fiscal year 2026.
| 2025 4 TH QUARTER-FY SALES |
January 28 th , 2026 after market closing |
| Quiet Period |
From January 13 rd to January 28 th 2026 included |
| 2025 FULL YEAR RESULTS |
March 18 th , 2026 before market opening |
| Quiet Period |
From February 16 th to March 18 th , 2026 included |
| 2026 1 ST QUARTER SALES |
April 28 th 2026 after market closing |
| Quiet Period |
From April 13 rd to April 28 th 2026 included |
| 2026 INTERIM RESULTS |
Thursday July 30st 2026 before market opening |
| Quiet Period |
From June 30 st to July 30 st 2026 included |
| 2026 3 RD QUARTER SALES |
October 28st 2026 after market closing |
| Quiet Period |
From October 13 rd to October 28 st 2026 included |
PRESS RELEASE

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 33 countries around the world, Mersen develops custom-built solutions and delivers key products for clients in order to meet the new technological challenges shaping tomorrow's world. For over 130 years, Mersen's teams have focused tirelessly on innovation to accompany its clients and meet their needs. Be it in solar power, electronics, electric vehicles, aerospace or other sectors, wherever technology is progressing, you will always find a bit of Mersen. We work to constantly contribute to progress, striving daily to improve people's lives and protect the planet. This corporate commitment has been recognized by external rating agencies, EcoVadis (Silver Medal) and MSCI (A rating).
MERSEN IS PART OF THE SBF 120 INDEX (EURONEXT PARIS – COMPARTMENT B)
INVESTOR AND ANALYST CONTACT MEDIA CONTACT Mersen Brunswick
Tel.: +33 (0)1 46 91 54 40 Tel.: +33 (0)6 33 06 55 93
Véronique Boca Guillaume Maujean/Stephan Bürklin
Email: [email protected] Email: [email protected]