Protagonist Therapeutics, Inc SEC filings PTGX
Protagonist Therapeutics, Inc has 706 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 Aug 5, 2026, covering the quarter ended Jun 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 |
|---|---|---|---|
| S-8 POS | Filing | Aug 5, 2026 | — |
| S-8 POS | Filing | Aug 5, 2026 | — |
| S-8 POS | Filing | Aug 5, 2026 | — |
| S-8 POS | Filing | Aug 5, 2026 | — |
| S-8 POS | Filing | Aug 5, 2026 | — |
| S-8 POS | Filing | Aug 5, 2026 | — |
| S-8 POS | Filing | Aug 5, 2026 | — |
| S-8 POS | Filing | Aug 5, 2026 | — |
| S-8 POS | Filing | Aug 5, 2026 | — |
| S-8 POS | Filing | Aug 5, 2026 | — |
| S-8 POS | Filing | Aug 5, 2026 | — |
| S-8 | Employee stock plan registration | Aug 5, 2026 | — |
| S-8 | Employee stock plan registration | Feb 25, 2026 | — |
| S-3ASR | Automatic shelf registration | Aug 6, 2025 | — |
| S-8 | Employee stock plan registration | Feb 21, 2025 | — |
| S-8 | Employee stock plan registration | Feb 27, 2024 | — |
| 424B5 | Prospectus supplement | Aug 11, 2023 | — |
| 424B5 | Prospectus supplement | Apr 6, 2023 | — |
| 424B5 | Prospectus supplement | Apr 4, 2023 | — |
| S-8 | Employee stock plan registration | Mar 15, 2023 | — |
| S-3 | Shelf registration | Aug 5, 2022 | — |
| S-8 | Employee stock plan registration | Feb 28, 2022 | — |
| 424B5 | Prospectus supplement | Jun 17, 2021 | — |
| 424B5 | Prospectus supplement | Jun 14, 2021 | — |
| S-8 | Employee stock plan registration | Mar 10, 2021 | — |
| 424B5 | Prospectus supplement | Dec 14, 2020 | — |
| 424B5 | Prospectus supplement | Dec 10, 2020 | — |
| S-3ASR | Automatic shelf registration | Dec 10, 2020 | — |
| 424B5 | Prospectus supplement | May 13, 2020 | — |
| 424B5 | Prospectus supplement | May 11, 2020 | — |
| S-8 | Employee stock plan registration | Mar 10, 2020 | — |
| 424B5 | Prospectus supplement | Nov 27, 2019 | — |
| S-3 | Shelf registration | Oct 31, 2019 | — |
| S-8 | Employee stock plan registration | Mar 12, 2019 | — |
| 424B3 | Prospectus | Sep 26, 2018 | — |
| S-3 | Shelf registration | Sep 7, 2018 | — |
| 424B5 | Prospectus supplement | Aug 7, 2018 | — |
| S-8 | Employee stock plan registration | May 30, 2018 | — |
| S-8 | Employee stock plan registration | Mar 7, 2018 | — |
| 424B5 | Prospectus supplement | Oct 13, 2017 | — |
| 424B5 | Prospectus supplement | Oct 11, 2017 | — |
| S-3 | Shelf registration | Sep 1, 2017 | — |
| S-8 | Employee stock plan registration | Mar 8, 2017 | — |
| S-8 | Employee stock plan registration | Aug 15, 2016 | — |
| 424B4 | Prospectus | Aug 12, 2016 | — |
| S-1MEF | Filing | Aug 10, 2016 | — |
| S-1/A | Amended registration statement | Aug 9, 2016 | — |
| S-1/A | Amended registration statement | Aug 1, 2016 | — |
| S-1 | Registration statement | Jul 11, 2016 | — |
Showing 49 filings. 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.