 NEW YORK--BUSINESS WIRE--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 GTT Communications, Inc. NYSE: GTT between May 5, 2016 and November 9, 2020, inclusive the Class Period. The lawsuit seeks to recover damages for GTT investors under the federal securities laws. To join the GTT class action, go or call Phillip Kim, Esq. toll-free at 866-76 