 Boston, Massachusetts--Newsfile Corp. - January 20, 2021 - The Thornton Law Firm announces that a class action lawsuit has been filed on behalf of investors of Covia Holdings Corporation fka Fairmount Santrol Holdings Inc. OTC Pink: CVIAQ. Investors who purchased Covia stock or other securities between March 15, 2016 and June 29, 2020 may contact the Thornton Law Firm to obtain a copy of the complaint or to discuss the lead plaintiff process. Interested investors... 