 New York, New York--Newsfile Corp. - February 5, 2021 - Bronstein, Gewirtz Grossman, LLC notifies investors that a class action lawsuit has been filed against Covia Holdings Corporation fka Fairmount Santrol Holdings Inc. Covia or the Company OTC Pink: CVIAQ NYSE: CVIA NYSE: FMSA and certain of its officers, on behalf of shareholders who purchased or otherwise acquired Covia securities between March 15, 2016 to June 29, 2020, both dates inclusive the... 