HGEN Humanigen Inc

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES                                                                                   
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response... 0.5                       
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940                       

1. Name and Address of Reporting Person * Chappell Dale	2. Issuer Name and Ticker or Trading Symbol HUMANIGEN, INC [ HGEN ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director                    __X__ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) Chief Scientific Officer
(Last)          (First)          (Middle) C/O OPUS EQUUM INC., PO BOX 788	3. Date of Earliest Transaction (MM/DD/YYYY) 6/7/2021
(Street) DOLORES, CO 81323 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, $0.001 par value (1)	6/7/2021		S		12732	D	$19.0832	1124334	I (2)	By Black Horse Capital LP
Common Stock, $0.001 par value (1)	6/7/2021		S		25464	D	$19.0832	2649549	I (3)	By Black Horse Capital Master Fund Ltd.
Common Stock, $0.001 par value (1)	6/7/2021		S		42440	D	$19.0832	9677408	I (4)	By Cheval Holdings, Ltd.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:
(1)	This Form 4 is filed jointly by Black Horse Capital LP (the "Domestic Fund"), Black Horse Capital Master Fund Ltd. (the "Offshore Fund"), Cheval Holdings, Ltd. ("Cheval"), Black Horse Capital Management LLC ("BH Management") and Dale Chappell (collectively, the "Reporting Persons"). Each of the Reporting Persons may be deemed to be a member of a Section 13(d) group that may be deemed to collectively beneficially own more than 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein. The filing of this Form 4 shall not be deemed an admission that the Reporting Persons are, for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, the beneficial owners of any securities of the Issuer he or it does not directly own.
(2)	Securities owned directly by the Domestic Fund. BH Management, as the managing general partner of the Domestic Fund, may be deemed to beneficially own the securities owned directly by the Domestic Fund. Dale Chappell, as the managing member of BH Management, may be deemed to beneficially own the securities owned directly by the Domestic Fund.
(3)	Securities owned directly by the Offshore Fund. Dale Chappell, as the controlling person of the Offshore Fund, may be deemed to beneficially own the securities owned directly by the Offshore Fund.
(4)	Securities owned directly by Cheval. Each of BH Management, by virtue of having been granted by the Board of Directors of Cheval the power to manage the securities of the Issuer owned by Cheval, and Dale Chappell, as the managing member of BH Management, may be deemed to beneficially own the securities owned directly by Cheval.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Chappell Dale C/O OPUS EQUUM INC. PO BOX 788 DOLORES, CO 81323	X	X	Chief Scientific Officer
BLACK HORSE CAPITAL MANAGEMENT LLC C/O OPUS EQUUM INC. PO BOX 788 DOLORES, CO 81323		X
BLACK HORSE CAPITAL LP C/O OPUS EQUUM INC. PO BOX 788 DOLORES, CO 81323		X
Black Horse Capital Master Fund Ltd. C/O OPUS EQUUM, INC. P.O. BOX 788 DOLORES, CO 81323		X
Cheval Holdings, Ltd. P.O. BOX 309G, UGLAND HOUSE GEORGETOWN GRAND CAYMAN, E9 KY1-1104		X

Signatures
BLACK HORSE CAPITAL LP By: Black Horse Capital Management LLC, its Managing General Partner By: /s/ Dale Chappell Name: Dale Chappell Title: Manager		6/9/2021
**Signature of Reporting Person		Date
BLACK HORSE CAPITAL MASTER FUND LTD. By: /s/ Dale Chappell Name: Dale Chappell Title: Director		6/9/2021
**Signature of Reporting Person		Date
BLACK HORSE CAPITAL MANAGEMENT LLC By: /s/ Dale Chappell Name: Dale Chappell Title: Manager		6/9/2021
**Signature of Reporting Person		Date
CHEVAL HOLDINGS, LTD. By: /s/ Dale Chappell Name: Dale Chappell Title: Director		6/9/2021
**Signature of Reporting Person		Date
/s/ Dale Chappell DALE CHAPPELL		6/9/2021
**Signature of Reporting Person		Date