Item 8.01 - Other Events.

On January 10, 2020, Sesen Bio, Inc. (the "Company") posted an updated corporate presentation on its website www.sesenbio.com. The Company intends to use the presentation at the J.P. Morgan 38th Annual Healthcare Conference being held from January 13-16, 2019. A copy of the presentation is filed herewith as Exhibit 99.1 and is incorporated herein by reference.

Item 9.01 - Financial Statements and Exhibits.

(d) Exhibits.

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Exhibit No.      Description
99.1               Sesen Bio, Inc. Corporate Presentation - J.P. Morgan 38th
                 Annual Healthcare Conference

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