0001104659-21-035074.txt : 20210311 0001104659-21-035074.hdr.sgml : 20210311 20210311170149 ACCESSION NUMBER: 0001104659-21-035074 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210309 FILED AS OF DATE: 20210311 DATE AS OF CHANGE: 20210311 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Diaz Allene M. CENTRAL INDEX KEY: 0001773314 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38129 FILM NUMBER: 21734064 MAIL ADDRESS: STREET 1: C/O ALLENA PHARMACEUTIALS, INC. STREET 2: ONEW NEWTON EXECUTIVE PARK SUITE 202 CITY: NEWTON STATE: MA ZIP: 02462 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 tm219431-2_4seq1.xml OWNERSHIP DOCUMENT X0306 4 2021-03-09 0 0001442836 Mersana Therapeutics, Inc. MRSN 0001773314 Diaz Allene M. C/O MERSANA THERAPEUTICS, INC. 840 MEMORIAL DRIVE CAMBRIDGE MA 02139 1 0 0 0 Stock Option (right to buy) 18.33 2021-03-09 4 A 0 39275 0 A 2031-03-08 Common Stock 39275 39275 D The option becomes exercisable in equal quarterly installments over three years from the date of the grant. /s/ Brian DeSchuytner, as Attorney-in-Fact 2021-03-11