 NEW YORK, Oct. 7, 2021 PRNewswire -- Pomerantz LLP announces that a class action lawsuit has been filed against Sesen Bio, Inc. Sesen Bio or the Company NASDAQ: SESN and certain of its officers. The class action, filed in the United States District Court for the Southern District of New York, and docketed under 21-cv-07309, is on behalf of a class consisting of all persons and entities other than Defendants that purchased or otherwise acquired Sesen Bio securities between December 21, 2020 and August 17, 2021, inclusive the Class Period. 