 EL SEGUNDO, Calif.--BUSINESS WIRE--NantKwest, Inc. NASDAQ: NK, a clinical-stage, natural killer cell-based therapeutics company, today announced that its stockholders approved by the required vote each of the proposals related to the pending merger of NantKwest and ImmunityBio, Inc. presented at the special meeting of stockholders held earlier in the day, including approval of the merger by a majority of unaffiliated stockholders of NantKwest. Final voting results for NantKwests special me 