Protagonist Therapeutics (PTGX) SEC Filings: History & Chart

Protagonist Therapeutics, Inc.(PTGX)

Biotechnology · Newark, CA

$138.69-1.94 (-1.38%)

Delayed quote: Oct 6, 2026, 4:00 PM EDT

About Protagonist Therapeutics, Inc.

Protagonist Therapeutics, Inc. is a biopharmaceutical firm dedicated to discovering and advancing peptide-based therapies. Their research primarily focuses on treatments for hematological and blood conditions, as well as inflammatory and immune-mediated disorders. The company's pipeline features rusfertide (PTG-300), an injectable hepcidin mimetic currently undergoing Phase II clinical trials for the management of polycythemia vera, hereditary hemochromatosis, and other blood-related ailments. Also in Phase II development is PN-943, an oral peptide engineered as a specific antagonist of alpha-4-beta-7 integrin, intended for addressing inflammatory bowel disease (IBD). Furthermore, they are progressing PN-235, an orally administered antagonist specifically targeting the interleukin-23 receptor, designed for both IBD and various non-IBD therapeutic applications. Protagonist Therapeutics maintains a licensing and collaborative agreement with Janssen Biotech, Inc. Founded in 2006, the company's headquarters are located in Newark, California.

Newark, CA

141 employees

www.protagonist-inc.com

Healthcare / Biotechnology

Sector: Healthcare
Industry: Biotechnology
CEO: Dinesh V. Patel

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Form	Filing Date	Accepted	Document
4	Oct 2, 2026	Oct 2, 2026	View filing
4	Sep 10, 2026	Sep 10, 2026	View filing
4	Sep 8, 2026	Sep 8, 2026	View filing
SC 13G/A	Aug 13, 2026	Aug 13, 2026	View filing
4	Aug 12, 2026	Aug 12, 2026	View filing
SC 13G	Aug 7, 2026	Aug 7, 2026	View filing
S-8 POS	Aug 5, 2026	Aug 5, 2026	View filing
S-8 POS	Aug 5, 2026	Aug 5, 2026	View filing
S-8 POS	Aug 5, 2026	Aug 5, 2026	View filing
S-8 POS	Aug 5, 2026	Aug 5, 2026	View filing
S-8 POS	Aug 5, 2026	Aug 5, 2026	View filing
S-8 POS	Aug 5, 2026	Aug 5, 2026	View filing
S-8 POS	Aug 5, 2026	Aug 5, 2026	View filing
S-8 POS	Aug 5, 2026	Aug 5, 2026	View filing
S-8 POS	Aug 5, 2026	Aug 5, 2026	View filing
S-8 POS	Aug 5, 2026	Aug 5, 2026	View filing
S-8 POS	Aug 5, 2026	Aug 5, 2026	View filing
S-8	Aug 5, 2026	Aug 5, 2026	View filing
10-Q	Aug 5, 2026	Aug 5, 2026	View filing
8-K	Aug 5, 2026	Aug 5, 2026	View filing
4	Jun 25, 2026	Jun 25, 2026	View filing
8-K	Jun 18, 2026	Jun 18, 2026	View filing
4	Jun 11, 2026	Jun 11, 2026	View filing
4	Jun 1, 2026	Jun 1, 2026	View filing
4/A	May 14, 2026	May 14, 2026	View filing
4	May 12, 2026	May 12, 2026	View filing
SC 13G	May 12, 2026	May 12, 2026	View filing
4	May 11, 2026	May 11, 2026	View filing
10-Q	May 5, 2026	May 5, 2026	View filing
8-K	May 5, 2026	May 5, 2026	View filing

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