<SEC-DOCUMENT>0001193125-18-145511-index.html : 20180501
<SEC-HEADER>0001193125-18-145511.hdr.sgml : 20180501
<ACCEPTANCE-DATETIME>20180501103603
ACCESSION NUMBER:		0001193125-18-145511
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20180501
DATE AS OF CHANGE:		20180501
EFFECTIVENESS DATE:		20180501

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SELLAS Life Sciences Group, Inc.
		CENTRAL INDEX KEY:			0001390478
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33958
		FILM NUMBER:		18793712

	BUSINESS ADDRESS:	
		STREET 1:		315 MADISON AVENUE
		STREET 2:		4TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		(813) 864-4523

	MAIL ADDRESS:	
		STREET 1:		315 MADISON AVENUE
		STREET 2:		4TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Galena Biopharma, Inc.
		DATE OF NAME CHANGE:	20110926

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	RXi Pharmaceuticals Corp
		DATE OF NAME CHANGE:	20110926

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GALENA BIOPHARMA, INC.
		DATE OF NAME CHANGE:	20110922
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d578139ddefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: d578139ddefa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g578139g45c23.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g578139g45c23.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g578139g61x62.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g578139g61x62.jpg

</DOCUMENT>
</SEC-DOCUMENT>