Prothena Corp Public Ltd Co SEC filings PRTA
Prothena Corp Public Ltd Co has 1,006 filings in SEC EDGAR's recent list, going back to Jan 31, 2013. Its latest annual report, Form ARS, was filed on Mar 27, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 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 |
|---|---|---|---|
| POS AM | Filing | Feb 27, 2026 | — |
| S-8 | Employee stock plan registration | Aug 8, 2025 | — |
| S-8 | Employee stock plan registration | Aug 8, 2024 | — |
| S-3ASR | Automatic shelf registration | Feb 22, 2024 | — |
| S-8 | Employee stock plan registration | Aug 3, 2023 | — |
| 424B5 | Prospectus supplement | Dec 16, 2022 | — |
| 424B5 | Prospectus supplement | Dec 13, 2022 | — |
| S-8 | Employee stock plan registration | Aug 10, 2022 | — |
| 424B5 | Prospectus supplement | Dec 23, 2021 | — |
| S-8 | Employee stock plan registration | Aug 6, 2021 | — |
| 424B5 | Prospectus supplement | May 28, 2021 | — |
| 424B5 | Prospectus supplement | Mar 24, 2021 | — |
| 424B5 | Prospectus supplement | Mar 23, 2021 | — |
| S-3ASR | Automatic shelf registration | Mar 23, 2021 | — |
| S-8 | Employee stock plan registration | Aug 11, 2020 | — |
| S-3/A | Amendment no. 1 to form s-3 | Nov 27, 2019 | — |
| S-3 | Shelf registration | May 22, 2019 | — |
| S-8 | Employee stock plan registration | Aug 9, 2018 | — |
| S-3ASR | Automatic shelf registration | Feb 26, 2018 | — |
| S-8 | Employee stock plan registration | May 23, 2017 | — |
| 424B5 | Prospectus supplement | Mar 6, 2017 | — |
| 424B5 | Prospectus supplement | Mar 2, 2017 | — |
| S-8 | Employee stock plan registration | May 26, 2016 | — |
| 424B5 | Prospectus supplement | Jan 7, 2016 | — |
| 424B5 | Prospectus supplement | Jan 5, 2016 | — |
| 424B5 | Prospectus supplement | Apr 8, 2015 | — |
| 424B5 | Prospectus supplement | Apr 6, 2015 | — |
| S-3ASR | Automatic shelf registration | Apr 6, 2015 | — |
| 424B5 | Prospectus supplement | Jun 25, 2014 | — |
| S-3MEF | Filing | Jun 24, 2014 | — |
| 424B5 | Prospectus supplement | Jun 23, 2014 | — |
| S-3ASR | Automatic shelf registration | Jun 23, 2014 | — |
| S-8 | Employee stock plan registration | Jun 6, 2014 | — |
| 424B3 | Prospectus | Jan 29, 2014 | — |
| 424B3 | Prospectus | Jan 27, 2014 | — |
| S-3 | Shelf registration | Jan 17, 2014 | — |
| 424B4 | Prospectus | Oct 3, 2013 | — |
| S-1MEF | Filing | Oct 2, 2013 | — |
| S-1/A | Amended registration statement | Sep 30, 2013 | — |
| S-1 | Registration statement | Sep 17, 2013 | — |
| S-8 | Employee stock plan registration | Apr 4, 2013 | — |
Showing 41 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
- PRTA (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- Ireland
- Headquarters
- Dublin 2, Ireland
- SEC filer status
- Accelerated filer
- SEC CIK
- 1559053
- Former names
- Prothena Corp plc (until May 22, 2020); Neotope Corp Ltd (until Oct 1, 2012)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.