SAN FRANCISCO, May 06, 2026 (GLOBE NEWSWIRE) -- ImmunityBio, Inc. (NASDAQ: IBRX) faces a securities class action lawsuit which seeks to represent investors who purchased or otherwise acquired ImmunityBio securities between January 19, 2026 and March 24, 2026. The lawsuit follows news that the FDA sent a warning letter to the company concerning claims made by its executive chairman and Chief Scientific and Medical Officer (Dr. Patrick Soon-Shiong) regarding ImmunityBio's lead biologic product (Anktiva), which the FDA said were misleading efficacy claims.