Protagonist Therapeutics, Inc SEC filings PTGX
Protagonist Therapeutics, Inc has 707 filings in SEC EDGAR's recent list, going back to Sep 28, 2006. Its latest annual report, Form ARS, was filed on Apr 28, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 6, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 27, 2026 | — |
| 4 | Insider transaction | Oct 2, 2026 | Sep 30, 2026 |
| 144 | Notice of proposed sale | Sep 30, 2026 | — |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 2026 | — |
| 4 | Insider transaction | Aug 12, 2026 | Aug 10, 2026 |
| 144 | Notice of proposed sale | Aug 10, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| 4 | Insider transaction | Jun 25, 2026 | Jun 23, 2026 |
| 144 | Notice of proposed sale | Jun 23, 2026 | — |
| 4 | Insider transaction | Jun 11, 2026 | Jun 10, 2026 |
| 144 | Notice of proposed sale | Jun 10, 2026 | — |
| 4 | Insider transaction | Jun 1, 2026 | May 29, 2026 |
| 144 | Notice of proposed sale | May 29, 2026 | — |
| 4/A | Ownership document | May 14, 2026 | May 12, 2026 |
| 4 | Insider transaction | May 12, 2026 | May 12, 2026 |
| 144 | Notice of proposed sale | May 12, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 12, 2026 | — |
| 4 | Insider transaction | May 11, 2026 | May 7, 2026 |
| 144 | Notice of proposed sale | May 8, 2026 | — |
| 144 | Notice of proposed sale | May 7, 2026 | — |
| 144 | Notice of proposed sale | May 7, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 4 | Insider transaction | Apr 24, 2026 | Apr 23, 2026 |
| 4 | Insider transaction | Apr 21, 2026 | Apr 20, 2026 |
| 144 | Notice of proposed sale | Apr 21, 2026 | — |
| 4 | Insider transaction | Mar 27, 2026 | Mar 26, 2026 |
| 4 | Insider transaction | Mar 27, 2026 | Mar 26, 2026 |
| 4 | Insider transaction | Mar 27, 2026 | Mar 26, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 144 | Notice of proposed sale | Mar 26, 2026 | — |
| 144 | Notice of proposed sale | Mar 26, 2026 | — |
| 144 | Notice of proposed sale | Mar 26, 2026 | — |
| 4 | Insider transaction | Mar 25, 2026 | Mar 23, 2026 |
| 144 | Notice of proposed sale | Mar 24, 2026 | — |
| 4 | Insider transaction | Feb 18, 2026 | Feb 17, 2026 |
| 144 | Notice of proposed sale | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 10, 2026 | — |
| 4 | Insider transaction | Feb 6, 2026 | Feb 6, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 6, 2026 | — |
| 144 | Notice of proposed sale | Feb 6, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 30, 2026 | — |
| 4 | Insider transaction | Jan 27, 2026 | Jan 23, 2026 |
| 4 | Insider transaction | Jan 27, 2026 | Jan 27, 2026 |
| 4 | Insider transaction | Jan 27, 2026 | Jan 23, 2026 |
| 144 | Notice of proposed sale | Jan 27, 2026 | — |
| 144 | Notice of proposed sale | Jan 27, 2026 | — |
| 144 | Notice of proposed sale | Jan 26, 2026 | — |
| 144 | Notice of proposed sale | Jan 23, 2026 | — |
| 144 | Notice of proposed sale | Jan 23, 2026 | — |
| 4 | Insider transaction | Jan 21, 2026 | Jan 20, 2026 |
| 4 | Insider transaction | Jan 21, 2026 | Jan 20, 2026 |
| 4 | Insider transaction | Jan 21, 2026 | Jan 20, 2026 |
| 144 | Notice of proposed sale | Jan 21, 2026 | — |
| 144 | Notice of proposed sale | Jan 21, 2026 | — |
| 144 | Notice of proposed sale | Jan 21, 2026 | — |
| 4 | Insider transaction | Jan 13, 2026 | Jan 9, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Jan 6, 2026 | Jan 2, 2026 |
| 4 | Insider transaction | Nov 24, 2025 | Nov 21, 2025 |
| 4 | Insider transaction | Nov 19, 2025 | Nov 17, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 17, 2025 | — |
| 4 | Insider transaction | Oct 14, 2025 | Oct 10, 2025 |
| 144 | Notice of proposed sale | Oct 10, 2025 | — |
| 4 | Insider transaction | Sep 24, 2025 | Sep 22, 2025 |
| 144 | Notice of proposed sale | Sep 22, 2025 | — |
| 4 | Insider transaction | Sep 18, 2025 | Sep 16, 2025 |
| 4 | Insider transaction | Aug 29, 2025 | Aug 27, 2025 |
| 144 | Notice of proposed sale | Aug 27, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 11, 2025 | — |
| 4 | Insider transaction | Jul 28, 2025 | Jul 25, 2025 |
| 4 | Insider transaction | Jul 23, 2025 | Jul 21, 2025 |
| 144 | Notice of proposed sale | Jul 22, 2025 | — |
| 4 | Insider transaction | Jul 18, 2025 | Jul 16, 2025 |
| 4 | Insider transaction | Jun 17, 2025 | Jun 13, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jun 16, 2025 | — |
| 4 | Insider transaction | Jun 11, 2025 | Jun 9, 2025 |
| 144 | Notice of proposed sale | Jun 10, 2025 | — |
| 144 | Notice of proposed sale | Jun 9, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 13, 2025 | — |
| 4 | Insider transaction | Apr 30, 2025 | Apr 28, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 29, 2025 | — |
| 4 | Insider transaction | Apr 23, 2025 | Apr 22, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 10, 2025 | — |
| 4 | Insider transaction | Mar 19, 2025 | Mar 17, 2025 |
| 144 | Notice of proposed sale | Mar 17, 2025 | — |
| 4 | Insider transaction | Mar 14, 2025 | Mar 13, 2025 |
| 4 | Insider transaction | Mar 14, 2025 | Mar 12, 2025 |
| 144 | Notice of proposed sale | Mar 13, 2025 | — |
| 144 | Notice of proposed sale | Mar 12, 2025 | — |
| 4 | Insider transaction | Mar 5, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Feb 20, 2025 | Feb 19, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 10, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2025 | — |
| 4 | Insider transaction | Jan 17, 2025 | Jan 16, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 16, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Jan 6, 2025 | Jan 2, 2025 |
| 4 | Insider transaction | Nov 27, 2024 | Nov 26, 2024 |
| 4 | Insider transaction | Nov 27, 2024 | Nov 25, 2024 |
| 4 | Insider transaction | Nov 27, 2024 | Nov 25, 2024 |
| 144 | Notice of proposed sale | Nov 27, 2024 | — |
| 144 | Notice of proposed sale | Nov 26, 2024 | — |
| 144 | Notice of proposed sale | Nov 26, 2024 | — |
| 144 | Notice of proposed sale | Nov 25, 2024 | — |
| 144 | Notice of proposed sale | Nov 25, 2024 | — |
| 4 | Insider transaction | Nov 21, 2024 | Nov 19, 2024 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 15, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 4, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Oct 16, 2024 | — |
| 4 | Insider transaction | Sep 13, 2024 | Sep 11, 2024 |
| 4 | Insider transaction | Sep 12, 2024 | Sep 10, 2024 |
| 144 | Notice of proposed sale | Sep 11, 2024 | — |
| 144 | Notice of proposed sale | Sep 10, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Aug 7, 2024 | — |
| 4 | Insider transaction | Jul 26, 2024 | Jul 24, 2024 |
| 144 | Notice of proposed sale | Jul 24, 2024 | — |
| 4 | Insider transaction | Jun 17, 2024 | Jun 13, 2024 |
| 4 | Insider transaction | Jun 11, 2024 | Jun 7, 2024 |
| 4 | Insider transaction | Jun 11, 2024 | Jun 7, 2024 |
| 144 | Notice of proposed sale | Jun 7, 2024 | — |
| 144 | Notice of proposed sale | Jun 7, 2024 | — |
| 4 | Insider transaction | Apr 19, 2024 | Apr 18, 2024 |
| 4 | Insider transaction | Apr 2, 2024 | Apr 1, 2024 |
| 144 | Notice of proposed sale | Apr 1, 2024 | — |
| 4 | Insider transaction | Mar 11, 2024 | Mar 7, 2024 |
| 4 | Insider transaction | Mar 1, 2024 | Mar 1, 2024 |
| 4 | Insider transaction | Mar 1, 2024 | Mar 1, 2024 |
| 4 | Insider transaction | Mar 1, 2024 | Feb 29, 2024 |
| 144 | Notice of proposed sale | Mar 1, 2024 | — |
| 144 | Notice of proposed sale | Mar 1, 2024 | — |
| 144 | Notice of proposed sale | Mar 1, 2024 | — |
| 144 | Notice of proposed sale | Feb 29, 2024 | — |
| 4 | Insider transaction | Feb 28, 2024 | Feb 26, 2024 |
| 4 | Insider transaction | Feb 28, 2024 | Feb 26, 2024 |
| 4 | Insider transaction | Feb 20, 2024 | Feb 15, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 7, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 2, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 24, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 23, 2024 | — |
| 4 | Insider transaction | Jan 18, 2024 | Jan 16, 2024 |
| 4 | Insider transaction | Jan 18, 2024 | Jan 16, 2024 |
| 4 | Insider transaction | Jan 11, 2024 | Jan 9, 2024 |
| 144 | Notice of proposed sale | Jan 9, 2024 | — |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 4, 2024 | Nov 15, 2023 |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| SC 13G | Ownership over 5% (passive) | Dec 18, 2023 | — |
| 4 | Insider transaction | Dec 15, 2023 | Dec 13, 2023 |
| 144 | Notice of proposed sale | Dec 13, 2023 | — |
| 4 | Insider transaction | Oct 30, 2023 | Oct 26, 2023 |
| 3 | Initial insider ownership | Oct 30, 2023 | Oct 26, 2023 |
| 4 | Insider transaction | Oct 23, 2023 | Oct 19, 2023 |
| 4 | Insider transaction | Oct 19, 2023 | Oct 18, 2023 |
| 4 | Insider transaction | Jun 2, 2023 | May 31, 2023 |
| 4 | Insider transaction | Jun 2, 2023 | May 31, 2023 |
| 4 | Insider transaction | Jun 2, 2023 | May 31, 2023 |
| 4 | Insider transaction | Apr 19, 2023 | Apr 18, 2023 |
| SC 13G | Ownership over 5% (passive) | Apr 13, 2023 | — |
| 4 | Insider transaction | Apr 11, 2023 | Apr 10, 2023 |
| SC 13G | Ownership over 5% (passive) | Mar 20, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Feb 9, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 31, 2023 | — |
| 4 | Insider transaction | Jan 18, 2023 | Jan 16, 2023 |
| 4 | Insider transaction | Jan 18, 2023 | Jan 16, 2023 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- PTGX (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Newark, CA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1377121
- Former names
- Protagonist Therapeutics Inc (until Jun 11, 2013); Protagonist Inc (until Sep 28, 2006)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.