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 |
|---|---|---|---|
| EFFECT | Filing | Mar 2, 2026 | — |
| POSASR | Filing | Feb 27, 2026 | — |
| UPLOAD | Letter from the SEC | Aug 23, 2023 | — |
| CORRESP | Letter to the SEC | Aug 4, 2023 | — |
| UPLOAD | Letter from the SEC | Jul 25, 2023 | — |
| CT ORDER | Filing | Apr 20, 2021 | — |
| SC TO-I/A | Amendment no. 5 to sc to-i | Feb 16, 2021 | — |
| SC TO-I/A | Amendment no. 4 to sc to-i | Feb 5, 2021 | — |
| SC TO-I/A | Amendment no. 3 to sc to-i | Jan 28, 2021 | — |
| SC TO-I/A | Amendment no. 2 to sc to-i | Jan 21, 2021 | — |
| SC TO-I/A | Amendment no. 1 to sc to-i | Dec 4, 2020 | — |
| SC TO-I | Filing | Nov 9, 2020 | — |
| EFFECT | Filing | Dec 12, 2019 | — |
| CORRESP | Letter to the SEC | Dec 10, 2019 | — |
| UPLOAD | Letter from the SEC | Jul 31, 2019 | — |
| CT ORDER | Filing | Jul 12, 2019 | — |
| CORRESP | Letter to the SEC | Jun 26, 2019 | — |
| CORRESP | Letter to the SEC | Jun 18, 2019 | — |
| CORRESP | Letter to the SEC | Jun 7, 2019 | — |
| UPLOAD | Letter from the SEC | May 29, 2019 | — |
| UPLOAD | Letter from the SEC | May 29, 2019 | — |
| CORRESP | Letter to the SEC | Apr 17, 2019 | — |
| UPLOAD | Letter from the SEC | Apr 4, 2019 | — |
| CT ORDER | Filing | Mar 28, 2019 | — |
| CORRESP | Letter to the SEC | Feb 28, 2019 | — |
| CORRESP | Letter to the SEC | Jan 22, 2019 | — |
| CORRESP | Letter to the SEC | Jan 3, 2019 | — |
| UPLOAD | Letter from the SEC | Dec 19, 2018 | — |
| CT ORDER | Filing | Aug 22, 2018 | — |
| D | Filing | Mar 29, 2018 | — |
| CT ORDER | Filing | Sep 12, 2017 | — |
| CT ORDER | Filing | Mar 22, 2017 | — |
| CT ORDER | Filing | Sep 12, 2016 | — |
| CT ORDER | Filing | Jun 16, 2014 | — |
| EFFECT | Filing | Jan 24, 2014 | — |
| EFFECT | Filing | Oct 2, 2013 | — |
| CT ORDER | Filing | Aug 30, 2013 | — |
Showing 37 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.