<SEC-DOCUMENT>0001104659-23-088358-index.html : 20230807
<SEC-HEADER>0001104659-23-088358.hdr.sgml : 20230807
<ACCEPTANCE-DATETIME>20230807161535
ACCESSION NUMBER:		0001104659-23-088358
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20230807
DATE AS OF CHANGE:		20230807
GROUP MEMBERS:		KOH, BONG
GROUP MEMBERS:		SHAH, NIMISH
GROUP MEMBERS:		VENROCK HEALTHCARE CAPITAL PARTNERS EG, L.P.
GROUP MEMBERS:		VHCP CO-INVESTMENT HOLDINGS III, LLC
GROUP MEMBERS:		VHCP MANAGEMENT EG, LLC
GROUP MEMBERS:		VHCP MANAGEMENT III, LLC

SUBJECT COMPANY:	

	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

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-90033
		FILM NUMBER:		231147814

	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

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Venrock Healthcare Capital Partners III, L.P.
		CENTRAL INDEX KEY:			0001738048
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		530 FIFTH AVENUE, 22ND FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10036
		BUSINESS PHONE:		212-444-4100

	MAIL ADDRESS:	
		STREET 1:		530 FIFTH AVENUE, 22ND FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10036
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>tm2322987d1_sc13g.htm
<DESCRIPTION>SC 13G
<TEXT>
Document 1 - file: tm2322987d1_sc13g.htm

</DOCUMENT>
</SEC-DOCUMENT>