ImmunityBio (IBRX) 10-Q 2016 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 Reportofthe CompanyonForm10­Qforthe quarter ended June 30, 2016 (the “Report”),fullycomplieswith the requirementsofSection13(a)or15(d)ofthe SecuritiesExchangeActof 1934,asamended;and

ii. the informationcontainedinthe Reportfairlypresents,inallmaterialrespects,the financialconditionand resultsofoperationsofthe Company.

Date: August 15,2016	By:	/s/Richard Tajak
		Richard Tajak
		Chief Financial Officer