Mersana Therapeutics, Inc. is a clinical-stage biopharmaceutical company, which engages in the development of antibody-drug conjugates that offer clinical benefit for cancer patients. Its product candidates are Upifitamab Rilsodotin (UpRi), XMT-1536, and XMT-1592. The company was founded by Mikhail Papisov in 2001 and is headquartered in Cambridge, MA.