ImmunityBio (IBRX) 10-Q 2017 Q2 Quarterly report

Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFICERPURSUANT TO 18 U.S.C. § 1350, AS ADOPTED PURSUANT TO SECTION 906OF THE SARBANES­OXLEY ACT OF 2002

I, Richard Tajak, the chief financial officer of NantKwest, Inc. (the “Company”), certify for the purposes of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

i. the Quarterly Report of the Company on Form 10-Q for the quarter ended June 30, 2017 (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

ii. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 7, 2017	By:	/s/ Richard Tajak
		Richard Tajak
		Chief Financial Officer