On January 5, 2023, Bradley L. Radoff and Michael Torok. announced that they issued an open letter to Sesen Bio, Inc?s Board of Directors regarding the proposed merger with Carisma Therapeutics Inc. Bradley L. Radoff and Michael Torok stated that they urged the Board to stop wasting corporate resources and hold a stockholder vote as soon as possible. Bradley L. Radoff and Michael Torok expressed that the vote on the pending merger as a referendum on directors?

stewardship, meaning they expect all Board members who continue to support the deal to resign if the transaction is voted down by stockholders.