Disclosure at December 31, 2012

PR Newswire/Les Echos/

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 233-16 OF THE AMF GENERAL REGULATIONS

                             AT DECEMBER 31ST, 2012

Total number of shares                       20,350,969

Number of real voting rights
(without own shares)                         20,248,474

Theoretical number of voting rights
(including own shares)                       20,350,969

About Mersen

Global expert in materials and solutions for extreme environments as well as in
the safety and reliability of electrical equipment Mersen designs innovative
solutions to address its clients' specific needs to enable them to optimize
their manufacturing process in sectors such as energy, transportation,
electronics, chemical, pharmaceutical and process industries
           The Group is listed on NYSE Euronext Paris - Compartment B
               Bloomberg ticker: MRN.FP - Reuters ticker: CBLP.PA

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