0001104659-23-093468.txt : 20230818 0001104659-23-093468.hdr.sgml : 20230818 20230818160145 ACCESSION NUMBER: 0001104659-23-093468 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230816 FILED AS OF DATE: 20230818 DATE AS OF CHANGE: 20230818 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: MISRA TUSHAR CENTRAL INDEX KEY: 0001877233 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38129 FILM NUMBER: 231185818 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 tm2324175-1_4seq1.xml OWNERSHIP DOCUMENT X0508 4 2023-08-16 0 0001442836 Mersana Therapeutics, Inc. MRSN 0001877233 MISRA TUSHAR C/O MERSANA THERAPEUTICS, INC. 840 MEMORIAL DRIVE CAMBRIDGE MA 02139 0 1 0 0 SVP, Chief Manuf. Officer 1 Common Stock 2023-08-16 4 M 0 6250 0 A 13415 D Common Stock 2023-08-17 4 S 0 1908 1.18 D 11507 D Restricted Stock Unit 2023-08-16 4 M 0 6250 0 D Common Stock 6250 12500 D Represents shares of common stock received upon vesting of a portion of the restricted stock units ("RSUs") awarded to the Reporting Person on August 16, 2021. Includes 1,235 shares of common stock acquired on June 15, 2023 by the Reporting Person through the Issuer's employee stock purchase plan. Represents the sale of shares of common stock to satisfy the Reporting Person's tax withholding obligations in connection with the service-based vesting and settlement of the RSUs pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 10, 2023. The sale was effected through an automatic "sell to cover" transaction that did not represent a discretionary trade by the Reporting Person. Each RSU represents the contingent right to receive one share of common stock of the Issuer. The RSUs will vest in equal annual installments over the first four years after the vesting commencement date, August 16, 2021, subject to the Reporting Person's continued service to the Issuer on such vesting date. /s/ Brigitte Eichner, Attorney-in-Fact 2023-08-18