<SEC-DOCUMENT>0001104659-19-036694-index.html : 20190620
<SEC-HEADER>0001104659-19-036694.hdr.sgml : 20190620
<ACCEPTANCE-DATETIME>20190620161532
ACCESSION NUMBER:		0001104659-19-036694
CONFORMED SUBMISSION TYPE:	424B5
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20190620
DATE AS OF CHANGE:		20190620

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Sesen Bio, Inc.
		CENTRAL INDEX KEY:			0001485003
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				262025616
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B5
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-223750
		FILM NUMBER:		19908718

	BUSINESS ADDRESS:	
		STREET 1:		245 FIRST STREET
		STREET 2:		SUITE 1800
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		617-444-8550

	MAIL ADDRESS:	
		STREET 1:		245 FIRST STREET
		STREET 2:		SUITE 1800
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Eleven Biotherapeutics, Inc.
		DATE OF NAME CHANGE:	20100223
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B5
<SEQUENCE>1
<FILENAME>a19-11720_1424b5.htm
<DESCRIPTION>424B5
<TEXT>
Document 1 - file: a19-11720_1424b5.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g117201cai001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g117201cai001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g117201bai001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g117201bai001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g117201hoi001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g117201hoi001.jpg

</DOCUMENT>
</SEC-DOCUMENT>