Protagonist Therapeutics, Inc., a biopharmaceutical company, develops peptide therapeutics for hematology and blood disorders, and inflammatory and immunomodulatory diseases. It is developing Rusfertide, an injectable mimetic of hepcidin that is in phase 3 clinical trials for the treatment of polycythemia vera; Icotrokinra, an orally delivered investigational drug which is in phase 3 clinical trials indicated to block biological pathways targeted by marketed injectable antibody drugs; and PN-943, an orally delivered, gut-restricted alpha 4 beta 7 specific integrin antagonist completed a phase 2 clinical trials in patients with moderate to severe ulcerative colitis. The company also develops IL-17 oral peptide antagonist PN-88,1 an oral metabolic/obesity peptide program, and an oral hepcidin mimetic/ferroportin blocker that is in pre-clinical stage. Protagonist Therapeutics, Inc. was incorporated in 2006 and is headquartered in Newark, California.
Company profile updated October 15, 2026.
As of October 12, 2026. Daily closing data may differ from the live quote shown in the dashboard.
Compare the company’s price history and fundamentals in the dashboard. Explore disclosed trading and ownership activity in these research collections: