<SEC-DOCUMENT>0001485003-22-000137-index.html : 20220927
<SEC-HEADER>0001485003-22-000137.hdr.sgml : 20220927
<ACCEPTANCE-DATETIME>20220927080127
ACCESSION NUMBER:		0001485003-22-000137
CONFORMED SUBMISSION TYPE:	425
PUBLIC DOCUMENT COUNT:		36
FILED AS OF DATE:		20220927
DATE AS OF CHANGE:		20220927

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:		221267306

	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>
<DOCUMENT>
<TYPE>425
<SEQUENCE>1
<FILENAME>sesnformmergeragreement_09.htm
<DESCRIPTION>425
<TEXT>
Document 1 - file: sesnformmergeragreement_09.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-2.1
<SEQUENCE>2
<FILENAME>exhibit21-projectseahawkxm.htm
<DESCRIPTION>EX-2.1
<TEXT>
Document 2 - file: exhibit21-projectseahawkxm.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>3
<FILENAME>exhibit101-contingentvalue.htm
<DESCRIPTION>EX-10.1
<TEXT>
Document 3 - file: exhibit101-contingentvalue.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.2
<SEQUENCE>4
<FILENAME>exhibit102-formofcompanyst.htm
<DESCRIPTION>EX-10.2
<TEXT>
Document 4 - file: exhibit102-formofcompanyst.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.3
<SEQUENCE>5
<FILENAME>exhibit103-formofparentsto.htm
<DESCRIPTION>EX-10.3
<TEXT>
Document 5 - file: exhibit103-formofparentsto.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.4
<SEQUENCE>6
<FILENAME>exhibit104-formoflockxupag.htm
<DESCRIPTION>EX-10.4
<TEXT>
Document 6 - file: exhibit104-formoflockxupag.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>7
<FILENAME>exhibit991-mergerannouncem.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 7 - file: exhibit991-mergerannouncem.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.2
<SEQUENCE>8
<FILENAME>exhibit992carismacorpora.htm
<DESCRIPTION>EX-99.2
<TEXT>
Document 8 - file: exhibit992carismacorpora.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.3
<SEQUENCE>9
<FILENAME>exhibit993-projectseahawkc.htm
<DESCRIPTION>EX-99.3
<TEXT>
Document 9 - file: exhibit993-projectseahawkc.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>10
<FILENAME>exhibit992carismacorpora001.jpg
<TEXT>
Document 10 - file: exhibit992carismacorpora001.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>11
<FILENAME>exhibit992carismacorpora002.jpg
<TEXT>
Document 11 - file: exhibit992carismacorpora002.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>12
<FILENAME>exhibit992carismacorpora003.jpg
<TEXT>
Document 12 - file: exhibit992carismacorpora003.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>13
<FILENAME>exhibit992carismacorpora004.jpg
<TEXT>
Document 13 - file: exhibit992carismacorpora004.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>14
<FILENAME>exhibit992carismacorpora005.jpg
<TEXT>
Document 14 - file: exhibit992carismacorpora005.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>15
<FILENAME>exhibit992carismacorpora006.jpg
<TEXT>
Document 15 - file: exhibit992carismacorpora006.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>16
<FILENAME>exhibit992carismacorpora007.jpg
<TEXT>
Document 16 - file: exhibit992carismacorpora007.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>17
<FILENAME>exhibit992carismacorpora008.jpg
<TEXT>
Document 17 - file: exhibit992carismacorpora008.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>18
<FILENAME>exhibit992carismacorpora009.jpg
<TEXT>
Document 18 - file: exhibit992carismacorpora009.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>19
<FILENAME>exhibit992carismacorpora010.jpg
<TEXT>
Document 19 - file: exhibit992carismacorpora010.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>20
<FILENAME>exhibit992carismacorpora011.jpg
<TEXT>
Document 20 - file: exhibit992carismacorpora011.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>21
<FILENAME>exhibit992carismacorpora012.jpg
<TEXT>
Document 21 - file: exhibit992carismacorpora012.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>22
<FILENAME>exhibit992carismacorpora013.jpg
<TEXT>
Document 22 - file: exhibit992carismacorpora013.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>23
<FILENAME>exhibit992carismacorpora014.jpg
<TEXT>
Document 23 - file: exhibit992carismacorpora014.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>24
<FILENAME>exhibit992carismacorpora015.jpg
<TEXT>
Document 24 - file: exhibit992carismacorpora015.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>25
<FILENAME>exhibit992carismacorpora016.jpg
<TEXT>
Document 25 - file: exhibit992carismacorpora016.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>26
<FILENAME>exhibit992carismacorpora017.jpg
<TEXT>
Document 26 - file: exhibit992carismacorpora017.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>27
<FILENAME>exhibit992carismacorpora018.jpg
<TEXT>
Document 27 - file: exhibit992carismacorpora018.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>28
<FILENAME>exhibit992carismacorpora019.jpg
<TEXT>
Document 28 - file: exhibit992carismacorpora019.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>29
<FILENAME>exhibit992carismacorpora020.jpg
<TEXT>
Document 29 - file: exhibit992carismacorpora020.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>30
<FILENAME>exhibit992carismacorpora021.jpg
<TEXT>
Document 30 - file: exhibit992carismacorpora021.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>31
<FILENAME>exhibit992carismacorpora022.jpg
<TEXT>
Document 31 - file: exhibit992carismacorpora022.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>32
<FILENAME>exhibit992carismacorpora023.jpg
<TEXT>
Document 32 - file: exhibit992carismacorpora023.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>33
<FILENAME>exhibit992carismacorpora024.jpg
<TEXT>
Document 33 - file: exhibit992carismacorpora024.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>34
<FILENAME>exhibit992carismacorpora025.jpg
<TEXT>
Document 34 - file: exhibit992carismacorpora025.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>35
<FILENAME>exhibit992carismacorpora026.jpg
<TEXT>
Document 35 - file: exhibit992carismacorpora026.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>36
<FILENAME>image_0.jpg
<TEXT>
Document 36 - file: image_0.jpg

</DOCUMENT>
</SEC-DOCUMENT>