<SEC-DOCUMENT>0001104659-23-009947-index.html : 20230202
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<ACCEPTANCE-DATETIME>20230202164908
ACCESSION NUMBER:		0001104659-23-009947
CONFORMED SUBMISSION TYPE:	425
PUBLIC DOCUMENT COUNT:		20
FILED AS OF DATE:		20230202
DATE AS OF CHANGE:		20230202

SUBJECT COMPANY:	

	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:		425
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-36296
		FILM NUMBER:		23581855

	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

FILED BY:		

	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:		425

	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>
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<TYPE>425
<SEQUENCE>1
<FILENAME>tm235275d2_425.htm
<DESCRIPTION>425
<TEXT>
Document 1 - file: tm235275d2_425.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>tm235275d2_ex99-1.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
Document 2 - file: tm235275d2_ex99-1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.2
<SEQUENCE>3
<FILENAME>tm235275d2_ex99-2.htm
<DESCRIPTION>EXHIBIT 99.2
<TEXT>
Document 3 - file: tm235275d2_ex99-2.htm

</DOCUMENT>
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<SEQUENCE>4
<FILENAME>tm235275d2_ex99-2img001.jpg
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Document 4 - file: tm235275d2_ex99-2img001.jpg

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Document 5 - file: tm235275d2_ex99-2img002.jpg

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Document 6 - file: tm235275d2_ex99-2img003.jpg

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Document 7 - file: tm235275d2_ex99-2img004.jpg

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Document 8 - file: tm235275d2_ex99-2img005.jpg

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Document 9 - file: tm235275d2_ex99-2img006.jpg

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Document 10 - file: tm235275d2_ex99-2img007.jpg

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Document 11 - file: tm235275d2_ex99-2img008.jpg

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Document 12 - file: tm235275d2_ex99-2img009.jpg

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Document 13 - file: tm235275d2_ex99-2img010.jpg

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Document 14 - file: tm235275d2_ex99-2img011.jpg

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Document 15 - file: tm235275d2_ex99-2img012.jpg

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Document 16 - file: tm235275d2_ex99-2img013.jpg

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Document 17 - file: tm235275d2_ex99-2img014.jpg

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Document 18 - file: tm235275d2_ex99-2img015.jpg

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Document 19 - file: tm235275d2_ex99-2img016.jpg

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Document 20 - file: tm235275d2_ex99-2img017.jpg

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