Moody's Investors Service, ("Moody's") has today downgraded all ratings of Imerys S.A. (Imerys), including the company's senior unsecured ratings and senior unsecured EMTN ratings to Baa3 from Baa2 and to (P)Baa3 from (P)Baa2. Concurrently, Moody's has downgraded Imerys'commercial paper rating and its Other Short Term rating to P-3 from P-2 and to (P)P-3 from (P)P-2 respectively.