<SEC-DOCUMENT>0001214659-20-007813-index.html : 20200911
<SEC-HEADER>0001214659-20-007813.hdr.sgml : 20200911
<ACCEPTANCE-DATETIME>20200911165819
ACCESSION NUMBER:		0001214659-20-007813
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20200911
DATE AS OF CHANGE:		20200911

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HUMANIGEN, INC
		CENTRAL INDEX KEY:			0001293310
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				770557236
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-239161
		FILM NUMBER:		201171601

	BUSINESS ADDRESS:	
		STREET 1:		533 AIRPORT BLVD.
		STREET 2:		SUITE 400
		CITY:			BURLINGAME
		STATE:			CA
		ZIP:			94010
		BUSINESS PHONE:		650.243.3100

	MAIL ADDRESS:	
		STREET 1:		533 AIRPORT BLVD.
		STREET 2:		SUITE 400
		CITY:			BURLINGAME
		STATE:			CA
		ZIP:			94010

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KALOBIOS PHARMACEUTICALS INC
		DATE OF NAME CHANGE:	20040609
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>f99204424b3.htm
<DESCRIPTION>PROSPECTUS SUPPLEMENT NO. 4
<TEXT>
Document 1 - file: f99204424b3.htm

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

</DOCUMENT>
</SEC-DOCUMENT>