0001104659-20-140590.txt : 20201230 0001104659-20-140590.hdr.sgml : 20201230 20201230170027 ACCESSION NUMBER: 0001104659-20-140590 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20201228 FILED AS OF DATE: 20201230 DATE AS OF CHANGE: 20201230 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: 201426491 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 tm2039620d1_4.xml OWNERSHIP DOCUMENT X0306 4 2020-12-28 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 Science & Tech. Officer Common Stock 2020-12-28 4 M 0 9000 1.40 A 25851 D Stock Option (right to buy) 1.40 2020-12-28 4 M 0 9000 0 D 2022-10-01 Common Stock 9000 65593 D The option vested 25% on August 1, 2013, and in equal quarterly installments thereafter. /s/ Brian DeSchuytner, as Attorney-in-Fact 2020-12-30