0001104659-23-052984.txt : 20230428 0001104659-23-052984.hdr.sgml : 20230428 20230428161555 ACCESSION NUMBER: 0001104659-23-052984 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230426 FILED AS OF DATE: 20230428 DATE AS OF CHANGE: 20230428 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Carvajal Alejandra CENTRAL INDEX KEY: 0001645755 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38129 FILM NUMBER: 23866428 MAIL ADDRESS: STREET 1: C/O CERULEAN PHARMA INC. STREET 2: 840 MEMORIAL DRIVE, 5TH FLOOR 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 tm2314135-1_4seq1.xml OWNERSHIP DOCUMENT X0407 4 2023-04-26 0 0001442836 Mersana Therapeutics, Inc. MRSN 0001645755 Carvajal Alejandra C/O MERSANA THERAPEUTICS, INC. 840 MEMORIAL DRIVE CAMBRIDGE MA 02139 0 1 0 0 SVP, Chief Legal Officer 1 Common Stock 2023-04-26 4 M 0 13250 0 A 24270 D Common Stock 2023-04-27 4 S 0 3944 3.89 D 20326 D Restricted stock unit 2023-04-26 4 M 0 13250 0 D Common Stock 13250 0 D Represents shares of common stock received upon the vesting of a portion of the restricted stock units ("RSUs") awarded to the Reporting Person on April 26, 2021. Pursuant to automatic sell-to-cover instructions adopted by the Reporting Person on April 26, 2021, the shares were sold upon the vesting of the RSUs solely to cover applicable withholding taxes. The automatic sale instructions for the sell-to-cover were intended to comply with the requirements of Rule 10b5-1(c). The sale was not 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 vested as to 50% of the shares on April 26, 2022 and as to 50% of the shares on April 26, 2023. /s/Alejandra Carvajal 2023-04-28