0001104659-22-001557.txt : 20220105 0001104659-22-001557.hdr.sgml : 20220105 20220105170452 ACCESSION NUMBER: 0001104659-22-001557 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20220103 FILED AS OF DATE: 20220105 DATE AS OF CHANGE: 20220105 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Hege Kristen CENTRAL INDEX KEY: 0001299171 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38129 FILM NUMBER: 22512152 MAIL ADDRESS: STREET 1: 500 FORBES BLVD CITY: SOUTH SAN FRANCISCO STATE: CA ZIP: 94070 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Mersana Therapeutics, Inc. CENTRAL INDEX KEY: 0001442836 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 840 MEMORIAL DRIVE CITY: CAMBRIDGE STATE: MA ZIP: 02139 BUSINESS PHONE: 617-498-0020 MAIL ADDRESS: STREET 1: 840 MEMORIAL DRIVE CITY: CAMBRIDGE STATE: MA ZIP: 02139 FORMER COMPANY: FORMER CONFORMED NAME: MERSANA THERAPEUTICS INC DATE OF NAME CHANGE: 20080813 4 1 tm221771-4_4seq1.xml OWNERSHIP DOCUMENT X0306 4 2022-01-03 0 0001442836 Mersana Therapeutics, Inc. MRSN 0001299171 Hege Kristen C/O MERSANA THERAPEUTICS, INC. 840 MEMORIAL DRIVE CAMBRIDGE MA 02139 1 0 0 0 Stock Option (right to buy) 6.44 2022-01-03 4 A 0 10416 0 A 2032-01-02 Common Stock 10416 10416 D The option becomes exercisable in equal quarterly installments on the last day of each calendar quarter of 2022. Brian DeSchuytner, as Attorney-in-Fact 2022-01-05