0000899243-20-010592.txt : 20200409 0000899243-20-010592.hdr.sgml : 20200409 20200409161112 ACCESSION NUMBER: 0000899243-20-010592 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20200407 FILED AS OF DATE: 20200409 DATE AS OF CHANGE: 20200409 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Hack Andrew A. F. CENTRAL INDEX KEY: 0001657434 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38129 FILM NUMBER: 20784645 MAIL ADDRESS: STREET 1: 300 THIRD STREET, FIRST FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02142 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 doc4.xml FORM 4 SUBMISSION X0306 4 2020-04-07 0 0001442836 Mersana Therapeutics, Inc. MRSN 0001657434 Hack Andrew A. F. C/O BAIN CAPITAL LIFE SCIENCES INVESTORS 200 CLARENDON STREET BOSTON MA 02116 1 0 0 0 Common Stock 2020-04-07 4 P 0 2800000 5.59 A 2800000 I See Footnotes Common Stock 2020-04-07 4 P 0 645667 7.74 A 3445667 I See Footnotes Represents shares of common stock held directly by Bain Capital Life Sciences Fund II, L.P. ("BCLS II") and BCIP Life Sciences Associates, LP ("BCIPLS" and, together with BCLS II, the "Bain Life Sciences Entities"). Bain Capital Life Sciences Investors, LLC ("BCLSI") is the ultimate general partner of the BCLS II, and governs the investment strategy and decision-making process with respect to investments held by BCIPLS. Dr. Hack is a Managing Director of BCLSI. By virtue of the relationships described in this footnote, Dr. Hack may be deemed to share voting and dispositive power with respect to the securities held by the Bain Life Sciences Entities. Dr. Hack disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein. /s/ Andrew A.F. Hack 2020-04-09