 NEW YORK--BUSINESS WIRE--Labaton Sucharow, a nationally ranked and award-winning shareholder rights law firm, is investigating potential securities violations and breach of fiduciary duty against cellular therapies company NantKwest, Inc. NASDAQ: NK in connection with its acquisition of ImmunityBio, a privately held company. If you currently own shares of NantKwest and want to receive additional information and protect your investments free of charge, please contact David J. Schwartz using 