Donald A Bergstrom, Chief Medical Officer at Mersana Therapeutics, holds ― shares in Mersana Therapeutics (Ticker: MRSN), holds 527.43K shares in Relay Therapeutics (Ticker: RLAY), holds ― shares in Fusion Pharmaceuticals (Ticker: FUSN). Most recently, Donald A Bergstrom ― shares of Mersana Therapeutics on ― for an estimated value of ―.