0000899243-21-023969.txt : 20210615 0000899243-21-023969.hdr.sgml : 20210615 20210615183543 ACCESSION NUMBER: 0000899243-21-023969 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210611 FILED AS OF DATE: 20210615 DATE AS OF CHANGE: 20210615 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Hack Andrew A. F. CENTRAL INDEX KEY: 0001657434 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38129 FILM NUMBER: 211020018 MAIL ADDRESS: STREET 1: 300 THIRD STREET, FIRST FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02142 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 doc4.xml FORM 4 SUBMISSION X0306 4 2021-06-11 0 0001442836 Mersana Therapeutics, Inc. MRSN] 0001657434 Hack Andrew A. F. C/O BAIN CAPITAL LIFE SCIENCES INVESTORS 200 CLARENDON STREET BOSTON MA 02116 1 0 0 0 Stock Option (right to buy) 14.90 2021-06-11 4 A 0 25050 0.00 A 2031-06-10 Common Stock 25050 25050 D The option vests in full on the earlier of the first anniversary of the date of grant or the date of the 2022 Annual Meeting of Stockholders of Mersana Therapeutics, Inc. /s/ Andrew Hack 2021-06-15