ImmunityBio (IBRX) Stock Tumbles After FDA Warning on Anktiva Claims
ImmunityBio shares fell 21.1% Tuesday after the FDA posted a warning letter accusing the company of false or misleading claims about its cancer drug Anktiva in a TV ad and podcast. The FDA said the materials suggested Anktiva could cure or prevent all cancer, which is not approved. ImmunityBio has 15 working days to respond. Anktiva accounted for nearly all of the company’s $113 million in 2025 revenue.