Janssen Biotech, Inc. is a biopharmaceutical company within Johnson & Johnson’s Innovative Medicine organization (formerly the Janssen Pharmaceutical Companies). It focuses on the discovery, development, and commercialization of biologic therapies, with major work spanning immunology and oncology, alongside other disease areas supported across the broader Janssen portfolio.

Headquartered in Horsham, Pennsylvania (U.S.), the company traces its origins to Centocor Biotech (founded in 1979), later becoming part of Johnson & Johnson and adopting the Janssen Biotech name in 2011 as Janssen unified its global operating companies under a common identity.