 NEW YORK, Dec. 11, 2020 GLOBE NEWSWIRE -- Rosen Law Firm, a global investor rights law firm, announces it has filed a class action lawsuit on behalf of purchasers of the securities of Covia Holdings Corporation fka Fairmount Santrol Holdings Inc. Covia OTC: CVIAQ NYSE: CVIA NYSE: FMSA between March 15, 2016 to June 29, 2020, inclusive the Class Period. The lawsuit seeks to recover damages for Covia investors under the federal securities laws. 