0001104659-18-011695.txt : 20180223 0001104659-18-011695.hdr.sgml : 20180223 20180223160141 ACCESSION NUMBER: 0001104659-18-011695 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20180221 FILED AS OF DATE: 20180223 DATE AS OF CHANGE: 20180223 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Lowinger Timothy B CENTRAL INDEX KEY: 0001709775 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38129 FILM NUMBER: 18636524 MAIL ADDRESS: STREET 1: 840 MEMORIAL DRIVE CITY: CAMBRIDGE STATE: MA ZIP: 02139 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 a4.xml 4 X0306 4 2018-02-21 0 0001442836 Mersana Therapeutics, Inc. MRSN 0001709775 Lowinger Timothy B C/O MERSANA THERAPEUTICS, INC. 840 MEMORIAL DRIVE CAMBRIDGE MA 02139 0 1 0 0 Chief Scientific Officer Common Stock 2018-02-21 4 M 0 5911 6.98 A 5911 D Option to Purchase Common Stock 6.98 2018-02-21 4 M 0 5911 0 D 2018-03-03 Common Stock 5911 0 D The option vested 25% on February 11, 2009 and in equal quarterly installments thereafter. /s/ Eva M. Jack , as Attorney-in-Fact 2018-02-23