SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Simon Barry J. (Last) (First) (Middle) C/O NANTKWEST, INC. 3530 JOHN HOPKINS COURT (Street) SAN DIEGO CA 92121 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol NantKwest, Inc. [ NK ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner X Officer (give title below) Other (specify below) See remarks
	3. Date of Earliest Transaction (Month/Day/Year) 07/20/2020
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person 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. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction 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	07/20/2020		M		40,730	A	$1.7554	3,211,270	D
Common Stock	07/20/2020		M		87,705	A	$1.9984	3,298,975	D
Common Stock	07/20/2020		S(1)		128,435	D	$15.5337(2)	3,170,540	D
Common Stock	07/21/2020		M		1,565	A	$1.9984	3,172,105	D
Common Stock	07/21/2020		S(1)		1,565	D	$15.5004(3)	3,170,540	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction 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 (Month/Day/Year)		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: 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
Stock Option (right to buy)	$1.7554	07/20/2020		M			40,730	(4)	12/18/2024	Common Stock	40,730	$0.00	56,967	D
Stock Option (right to buy)	$1.9984	07/20/2020		M			87,705	(5)	02/16/2025	Common Stock	87,705	$0.00	393,685	D
Stock Option (right to buy)	$1.9984	07/21/2020		M			1,565	(5)	02/16/2025	Common Stock	1,565	$0.00	392,120	D

Explanation of Responses:

1. The sale of shares reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan entered into by the reporting person on December 12, 2019.

2. Represents the weighted average share price of an aggregate total of 128,435 shares sold in the price range of $15.50 to $15.70 by the reporting person. The reporting person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

3. Represents the weighted average share price of an aggregate total of 1,565 shares sold in the price range of $15.50 to $15.5050 by the reporting person. The reporting person undertakes to provide upon request by the Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.

4. Subject to the reporting person's continuing service, one twenty-fourth (1/24th) of the shares subject to the option shall vest each month on the same day as the vesting commencement date, such that the shares subject to the option shall become fully vested and exercisable on the second (2nd) anniversary of the vesting commencement date. The vesting commencement date for this option is December 18, 2014. The option originally covered 200,000 pre 1.8515 for 1 forward split shares. Pursuant to the reporting person's employment agreement, the shares subject to the option shall be subject to certain accelerated vesting and post-termination exercise period provisions upon certain events.

5. Subject to the reporting person's continuing service, one twenty-fourth (1/24th) of the shares subject to the option shall vest each month on the same day as the vesting commencement date, such that the shares subject to the option shall become fully vested and exercisable on the second (2nd) anniversary of the vesting commencement date. The vesting commencement date for this option is January 16, 2015.

Remarks:

President and Chief Administrative Officer

	/s/ Sonja Nelson, as Attorney-in-Fact	07/22/2020
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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