Item 8.01 - Other Events.

On January 13, 2021, Sesen Bio, Inc. (the "Company") issued a press release announcing that the Investigational New Drug application for Vicineum™ submitted by the Company's partner in China, Qilu Pharmaceutical Co., Ltd., was accepted for review by the China National Medical Products Administration.

A copy of the press release is attached as Exhibit 99.1 to this report and is incorporated herein by reference.

Item 9.01 - Financial Statements and Exhibits.



(d) Exhibits.

Exhibit No.       Description

99.1                Press Release dated January 13, 2021

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