<SEC-DOCUMENT>0001485003-19-000033-index.html : 20190521
<SEC-HEADER>0001485003-19-000033.hdr.sgml : 20190521
<ACCEPTANCE-DATETIME>20190521165237
ACCESSION NUMBER:		0001485003-19-000033
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		4
FILED AS OF DATE:		20190521
DATE AS OF CHANGE:		20190521
EFFECTIVENESS DATE:		20190521

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:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-231644
		FILM NUMBER:		19843015

	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>S-8
<SEQUENCE>1
<FILENAME>sesn-formsx8evergreenshare.htm
<DESCRIPTION>S-8
<TEXT>
Document 1 - file: sesn-formsx8evergreenshare.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>sesn-exhibit512019formsx8e.htm
<DESCRIPTION>EXHIBIT 5.1
<TEXT>
Document 2 - file: sesn-exhibit512019formsx8e.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>forms-8consentdraft5x21x19.htm
<DESCRIPTION>EXHIBIT 23.1
<TEXT>
Document 3 - file: forms-8consentdraft5x21x19.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>sesnexhibit512019form_image1.jpg
<TEXT>
Document 4 - file: sesnexhibit512019form_image1.jpg

</DOCUMENT>
</SEC-DOCUMENT>