Mersen

Business and Financial Review • Jul 28, 2025

MERSEN SECURES ORDERS WORTH TENS OF MILLIONS OF EUROS IN THE ELECTRICITY CONVERSION SECTOR

PARIS, JULY 28, 2025 – Mersen (Euronext FR0000039620 – MRN), a global expert in electrical power and advanced materials, today announced the signing of a series of orders worth a total of more than €35 million with major long-distance power transmission players who deploy HVDC (High Voltage Direct Current) technology.

As part of five projects aimed at connecting future offshore wind farms in the North Sea and Baltic Sea to German and Dutch electricity distribution networks, Mersen will supply several converter components: cooling devices and fuses to protect the power modules integrated into the conversion stations, as well as busbars connecting the conversion elements. Two orders for a similar project in the Middle East have also been signed recently.

Delivery of the components started in the first half of 2025, totaling €7 million, and will continue through 2026.

Luc Themelin, Chief Executive Officer of Mersen, said: "The power conversion station market is expected to exceed US\$15 billion by 2030, representing a compound annual growth rate (CAGR) of 4.8% between 2025 and 2030. This is a promising market in which we are well positioned, as our components are custom-designed in collaboration with our customers to meet the reliability requirements of this high-tech equipment, which is used in particularly challenging environments and conditions."

HVDC technology is a power electronics technology commonly used for transporting high-voltage direct current electricity over long distances. Electricity from renewable sources, which is produced as alternating current, must be converted into direct current in order to be transported via high-voltage lines to the local grid, before being converted back into alternating current to supply the power grid.

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 custombuilt 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 (Gold 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: dri@mersen.com Email: mersen@brunswickgroup.com