<SEC-DOCUMENT>0001485003-19-000082-index.html : 20191029
<SEC-HEADER>0001485003-19-000082.hdr.sgml : 20191029
<ACCEPTANCE-DATETIME>20191029165358
ACCESSION NUMBER:		0001485003-19-000082
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		7
CONFORMED PERIOD OF REPORT:	20191028
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Material Modifications to Rights of Security Holders
ITEM INFORMATION:		Other Events
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20191029
DATE AS OF CHANGE:		20191029

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:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36296
		FILM NUMBER:		191176414

	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>8-K
<SEQUENCE>1
<FILENAME>sesn-form8xkwarrantagreeme.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: sesn-form8xkwarrantagreeme.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.1
<SEQUENCE>2
<FILENAME>sesn-2017warrantexerciseag.htm
<DESCRIPTION>EXHIBIT 4.1
<TEXT>
Document 2 - file: sesn-2017warrantexerciseag.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.2
<SEQUENCE>3
<FILENAME>sesn-2017warrantamendmenta.htm
<DESCRIPTION>EXHIBIT 4.2
<TEXT>
Document 3 - file: sesn-2017warrantamendmenta.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.3
<SEQUENCE>4
<FILENAME>sesn-2018warrantexerciseag.htm
<DESCRIPTION>EXHIBIT 4.3
<TEXT>
Document 4 - file: sesn-2018warrantexerciseag.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-4.4
<SEQUENCE>5
<FILENAME>sesn-2018warrantamendmenta.htm
<DESCRIPTION>EXHIBIT 4.4
<TEXT>
Document 5 - file: sesn-2018warrantamendmenta.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>6
<FILENAME>sesn-spaamendment.htm
<DESCRIPTION>EXHIBIT 10.1
<TEXT>
Document 6 - file: sesn-spaamendment.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>7
<FILENAME>sesn-warrantspressrelease_.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 7 - file: sesn-warrantspressrelease_.htm

</DOCUMENT>
</SEC-DOCUMENT>