<SEC-DOCUMENT>0001104659-23-026764-index.html : 20230228
<SEC-HEADER>0001104659-23-026764.hdr.sgml : 20230228
<ACCEPTANCE-DATETIME>20230228163702
ACCESSION NUMBER:		0001104659-23-026764
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		6
FILED AS OF DATE:		20230228
DATE AS OF CHANGE:		20230228
EFFECTIVENESS DATE:		20230228

FILER:

	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:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-270110
		FILM NUMBER:		23686172

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8
<SEQUENCE>1
<FILENAME>tm238018d1_s8.htm
<DESCRIPTION>FORM S-8
<TEXT>
Document 1 - file: tm238018d1_s8.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>tm238018d1_ex5-1.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
Document 2 - file: tm238018d1_ex5-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.2
<SEQUENCE>3
<FILENAME>tm238018d1_ex23-2.htm
<DESCRIPTION>EXHIBIT 23.2
<TEXT>
Document 3 - file: tm238018d1_ex23-2.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-FILING FEES
<SEQUENCE>4
<FILENAME>tm238018d1_ex-filingfees.htm
<DESCRIPTION>EX-FILING FEES
<TEXT>
Document 4 - file: tm238018d1_ex-filingfees.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>tm238018d1_ex5-1img01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: tm238018d1_ex5-1img01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>tm238018d1_ex5-1img002.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: tm238018d1_ex5-1img002.jpg

</DOCUMENT>
</SEC-DOCUMENT>