0001104659-23-106841.txt : 20231004 0001104659-23-106841.hdr.sgml : 20231004 20231004163051 ACCESSION NUMBER: 0001104659-23-106841 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20231002 FILED AS OF DATE: 20231004 DATE AS OF CHANGE: 20231004 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Dere Willard H CENTRAL INDEX KEY: 0001311569 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38129 FILM NUMBER: 231308407 MAIL ADDRESS: STREET 1: ONE AMGEN CENTER DRIVE CITY: THOUSAND OAKS STATE: CA ZIP: 91320-1799 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 tm2327613d4_4seq1.xml OWNERSHIP DOCUMENT X0508 4 2023-10-02 0 0001442836 Mersana Therapeutics, Inc. MRSN 0001311569 Dere Willard H C/O MERSANA THERAPEUTICS, INC. 840 MEMORIAL DRIVE CAMBRIDGE MA 02139 1 0 0 0 0 Common Stock 2023-10-02 4 A 0 11011 0 A 33070 D These shares were granted in connection with the Reporting Person's election to receive the Reporting Person's quarterly retainer for director services in the form of fully vested shares of stock rather than cash. The shares were granted to the Reporting Person pursuant to the Issuer's Amended & Restated Non-Employee Director Compensation Policy in lieu of retainer fees of $13,875 for the quarter ended September 30, 2023. The number of shares issued was based on the closing price per share of the Issuer's common stock on October 2, 2023, which was $1.26. /s/ Alejandra Carvajal, Attorney-in-Fact 2023-10-04