Phio Pharmaceuticals Corp. SEC filings PHIO
Phio Pharmaceuticals Corp. has 892 filings in SEC EDGAR's recent list, going back to Oct 25, 2011. Its latest annual report, Form ARS, was filed on Aug 14, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 6, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 13, 2026 (other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| S-8 | Employee stock plan registration | Sep 28, 2026 | — |
| 424B5 | Prospectus supplement | Apr 8, 2026 | — |
| 424B3 | Prospectus | Dec 4, 2025 | — |
| S-3 | Shelf registration | Nov 20, 2025 | — |
| S-8 | Employee stock plan registration | Sep 11, 2025 | — |
| 424B3 | Prospectus | Aug 27, 2025 | — |
| S-3 | Shelf registration | Aug 15, 2025 | — |
| 424B3 | Prospectus | Jan 29, 2025 | — |
| S-1 | Registration statement | Jan 21, 2025 | — |
| 424B5 | Prospectus supplement | Jan 17, 2025 | — |
| 424B5 | Prospectus supplement | Jan 15, 2025 | — |
| 424B5 | Prospectus supplement | Jan 14, 2025 | — |
| 424B5 | Prospectus supplement | Dec 23, 2024 | — |
| 424B5 | Prospectus supplement | Dec 20, 2024 | — |
| 424B3 | Prospectus | Aug 5, 2024 | — |
| S-1 | Registration statement | Jul 26, 2024 | — |
| S-3 | Shelf registration | May 20, 2024 | — |
| S-1 | Registration statement | May 17, 2024 | — |
| 424B5 | Prospectus supplement | May 17, 2024 | — |
| 424B3 | Prospectus | Dec 28, 2023 | — |
| S-1 | Registration statement | Dec 19, 2023 | — |
| S-8 | Employee stock plan registration | Sep 29, 2023 | — |
| 424B3 | Prospectus | Jun 20, 2023 | — |
| S-1 | Registration statement | Jun 8, 2023 | — |
| 424B5 | Prospectus supplement | Jun 1, 2023 | — |
| 424B3 | Prospectus | May 10, 2023 | — |
| S-1 | Registration statement | Apr 28, 2023 | — |
| 424B3 | Prospectus | Apr 20, 2023 | — |
| 424B3 | Prospectus | Apr 20, 2023 | — |
| 424B3 | Prospectus | Apr 20, 2023 | — |
| 424B3 | Prospectus | Apr 20, 2023 | — |
| 424B3 | Prospectus | Apr 20, 2023 | — |
| 424B3 | Prospectus | Apr 20, 2023 | — |
| 424B5 | Prospectus supplement | Apr 19, 2023 | — |
| S-3 | Shelf registration | May 13, 2021 | — |
| 424B5 | Prospectus supplement | Feb 17, 2021 | — |
| 424B2 | Prospectus | Feb 9, 2021 | — |
| S-3/A | Form s-3 amendment 1 | Feb 4, 2021 | — |
| S-3 | Shelf registration | Jan 29, 2021 | — |
| S-8 | Employee stock plan registration | Dec 23, 2020 | — |
| 424B3 | Prospectus | Jul 20, 2020 | — |
| S-1 | Registration statement | Jul 9, 2020 | — |
| 424B3 | Prospectus | Jun 2, 2020 | — |
| S-1/A | Amended registration statement | May 28, 2020 | — |
| S-1 | Registration statement | May 12, 2020 | — |
| 424B5 | Prospectus supplement | Apr 1, 2020 | — |
| S-8 | Employee stock plan registration | Feb 28, 2020 | — |
| 424B4 | Prospectus | Feb 12, 2020 | — |
| S-1/A | Amended registration statement | Feb 7, 2020 | — |
| 424B5 | Prospectus supplement | Feb 6, 2020 | — |
| S-1/A | Amended registration statement | Jan 31, 2020 | — |
| 424B5 | Prospectus supplement | Nov 18, 2019 | — |
| 424B3 | Prospectus | Nov 18, 2019 | — |
| 424B5 | Prospectus supplement | Nov 13, 2019 | — |
| 424B3 | Prospectus | Oct 2, 2019 | — |
| S-1 | Registration statement | Oct 1, 2019 | — |
| S-1/A | Amended registration statement | Sep 25, 2019 | — |
| S-1 | Registration statement | Aug 30, 2019 | — |
| S-8 | Employee stock plan registration | Mar 27, 2019 | — |
| 424B4 | Prospectus | Oct 2, 2018 | — |
| S-1MEF | Form s-1 mef | Oct 1, 2018 | — |
| S-1/A | Amended registration statement | Sep 28, 2018 | — |
| FWP | Free writing prospectus | Sep 14, 2018 | — |
| S-1/A | Amended registration statement | Sep 14, 2018 | — |
| S-1 | Registration statement | Aug 31, 2018 | — |
| S-8 | Employee stock plan registration | Aug 24, 2018 | — |
| S-1 | Registration statement | May 9, 2018 | — |
| 424B5 | Prospectus supplement | Apr 11, 2018 | — |
| S-3 | Shelf registration | Mar 29, 2018 | — |
| 424B3 | Prospectus | Aug 31, 2017 | — |
| S-1 | Registration statement | Aug 18, 2017 | — |
| 424B3 | Prospectus | Aug 9, 2017 | — |
| S-1/A | Amended registration statement | Jul 31, 2017 | — |
| S-1 | Registration statement | Jul 14, 2017 | — |
| POS AM | Filing | Jun 16, 2017 | — |
| POS AM | Filing | May 4, 2017 | — |
| S-8 | Employee stock plan registration | Feb 2, 2017 | — |
| S-8 | Employee stock plan registration | Feb 2, 2017 | — |
| 424B4 | Prospectus | Dec 19, 2016 | — |
| S-1/A | Amended registration statement | Dec 15, 2016 | — |
| S-1/A | Amended registration statement | Dec 14, 2016 | — |
| S-1/A | Amended registration statement | Nov 30, 2016 | — |
| S-1/A | Amended registration statement | Nov 14, 2016 | — |
| S-1 | Registration statement | Oct 21, 2016 | — |
| 424B4 | Prospectus | May 29, 2015 | — |
| S-1MEF | Filing | May 27, 2015 | — |
| 424B3 | Prospectus | May 27, 2015 | — |
| S-1/A | Amended registration statement | May 22, 2015 | — |
| S-1/A | Amended registration statement | May 21, 2015 | — |
| S-1 | Registration statement | Apr 13, 2015 | — |
| 424B5 | Prospectus supplement | Dec 19, 2014 | — |
| 424B3 | Prospectus | Dec 18, 2014 | — |
| 424B3 | Prospectus | Apr 23, 2014 | — |
| S-3 | Shelf registration | Apr 1, 2014 | — |
| 424B3 | Prospectus | Nov 15, 2013 | — |
| 424B3 | Prospectus | Nov 15, 2013 | — |
| 424B3 | Prospectus | Oct 1, 2013 | — |
| S-1 | Registration statement | Sep 18, 2013 | — |
| 424B3 | Prospectus | Aug 16, 2013 | — |
| 424B3 | Prospectus | Aug 8, 2013 | — |
| S-1/A | Amended registration statement | Jul 26, 2013 | — |
| S-8 | Employee stock plan registration | Jun 21, 2013 | — |
| S-8 | Employee stock plan registration | Jun 21, 2013 | — |
| S-1 | Registration statement | May 10, 2013 | — |
| 424B3 | Prospectus | Nov 13, 2012 | — |
| S-8 | Employee stock plan registration | Aug 30, 2012 | — |
| 424B3 | Prospectus | Aug 14, 2012 | — |
| 424B3 | Prospectus | Jul 12, 2012 | — |
| 424B3 | Prospectus | Jul 12, 2012 | — |
| 424B3 | Prospectus | Jul 12, 2012 | — |
| 424B3 | Prospectus | Jul 12, 2012 | — |
| S-1 | Registration statement | May 18, 2012 | — |
| 424B3 | Prospectus | Apr 30, 2012 | — |
| S-1/A | Amended registration statement | Feb 14, 2012 | — |
| S-1/A | Amended registration statement | Feb 13, 2012 | — |
| S-1/A | Amended registration statement | Feb 7, 2012 | — |
| S-1/A | Amended registration statement | Jan 23, 2012 | — |
| S-1/A | Amended registration statement | Dec 29, 2011 | — |
| S-1/A | Amended registration statement | Dec 8, 2011 | — |
| S-1 | Registration statement | Oct 25, 2011 | — |
Showing 120 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
- PHIO (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- King Of Prussia, PA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1533040
- Former names
- RXi Pharmaceuticals Corp (until Nov 14, 2018)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.