SESEN BIO SHAREHOLDERS: October 18, 2021 Filing Deadline in Class Action – Contact Lieff Cabraser

SAN FRANCISCO, CA – (September 3, 2021) – The law firm of Lieff Cabraser Heimann & Bernstein, LLP announces that class action litigation has been filed on behalf of investors who purchased or otherwise acquired the securities of Sesen Bio, Inc. (“Sesen Bio” or the “Company”) (NASDAQ: SESN) between December 21, 2020 and August 17,