Tenax Therapeutics, Inc. SEC filings TENX
Tenax Therapeutics, Inc. has 995 filings in SEC EDGAR's recent list, going back to Aug 2, 1996. Its latest annual report, Form ARS, was filed on Apr 22, 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 | Apr 1, 2026 | — |
| CORRESP | Letter to the SEC | Mar 31, 2026 | — |
| UPLOAD | Letter from the SEC | Mar 27, 2026 | — |
| EFFECT | Filing | Apr 23, 2025 | — |
| CORRESP | Letter to the SEC | Apr 21, 2025 | — |
| UPLOAD | Letter from the SEC | Apr 18, 2025 | — |
| EFFECT | Filing | Sep 12, 2024 | — |
| CORRESP | Letter to the SEC | Sep 10, 2024 | — |
| UPLOAD | Letter from the SEC | Sep 5, 2024 | — |
| D | Filing | Aug 23, 2024 | — |
| EFFECT | Filing | Apr 12, 2024 | — |
| EFFECT | Filing | Apr 12, 2024 | — |
| EFFECT | Filing | Feb 7, 2024 | — |
| CORRESP | Letter to the SEC | Feb 5, 2024 | — |
| CORRESP | Letter to the SEC | Feb 5, 2024 | — |
| CORRESP | Letter to the SEC | Feb 1, 2024 | — |
| UPLOAD | Letter from the SEC | Dec 7, 2023 | — |
| UPLOAD | Letter from the SEC | Aug 16, 2023 | — |
| CORRESP | Letter to the SEC | Aug 10, 2023 | — |
| UPLOAD | Letter from the SEC | Aug 7, 2023 | — |
| EFFECT | Filing | Feb 2, 2023 | — |
| CORRESP | Letter to the SEC | Feb 1, 2023 | — |
| UPLOAD | Letter from the SEC | Jan 26, 2023 | — |
| EFFECT | Filing | Jun 3, 2022 | — |
| D | Filing | Jun 1, 2022 | — |
| CORRESP | Letter to the SEC | Jun 1, 2022 | — |
| UPLOAD | Letter from the SEC | May 31, 2022 | — |
| EFFECT | Filing | Sep 1, 2021 | — |
| CORRESP | Letter to the SEC | Aug 31, 2021 | — |
| UPLOAD | Letter from the SEC | Aug 30, 2021 | — |
| D | Filing | Jul 20, 2021 | — |
| SEC STAFF LETTER | Filing | Mar 29, 2021 | — |
| SEC STAFF LETTER | Filing | Mar 1, 2021 | — |
| EFFECT | Filing | Sep 30, 2020 | — |
| CORRESP | Letter to the SEC | Sep 29, 2020 | — |
| CORRESP | Letter to the SEC | Sep 11, 2020 | — |
| UPLOAD | Letter from the SEC | Sep 4, 2020 | — |
| D | Filing | Jul 22, 2020 | — |
| D | Filing | Mar 27, 2020 | — |
| EFFECT | Filing | Dec 7, 2018 | — |
| CORRESP | Letter to the SEC | Dec 7, 2018 | — |
| CORRESP | Letter to the SEC | Dec 7, 2018 | — |
| CORRESP | Letter to the SEC | Dec 6, 2018 | — |
| CORRESP | Letter to the SEC | Dec 6, 2018 | — |
| CORRESP | Letter to the SEC | Dec 4, 2018 | — |
| CORRESP | Letter to the SEC | Dec 4, 2018 | — |
| UPLOAD | Letter from the SEC | Nov 9, 2018 | — |
| EFFECT | Filing | May 23, 2018 | — |
| UPLOAD | Letter from the SEC | May 22, 2018 | — |
| CORRESP | Letter to the SEC | May 21, 2018 | — |
| EFFECT | Filing | Mar 6, 2015 | — |
| CORRESP | Letter to the SEC | Mar 6, 2015 | — |
| CORRESP | Letter to the SEC | Mar 3, 2015 | — |
| UPLOAD | Letter from the SEC | Feb 26, 2015 | — |
| EFFECT | Filing | Sep 8, 2014 | — |
| EFFECT | Filing | Jun 13, 2014 | — |
| CT ORDER | Filing | Apr 17, 2014 | — |
| NT 10-Q | Late filing notification | Dec 16, 2013 | Oct 31, 2013 |
| D | Filing | Nov 29, 2013 | — |
| EFFECT | Filing | Oct 10, 2013 | — |
| NT 10-Q | Late filing notification | Sep 16, 2013 | Jul 31, 2013 |
| D | Filing | Sep 3, 2013 | — |
| D | Filing | Aug 7, 2013 | — |
| EFFECT | Filing | Jul 19, 2013 | — |
| EFFECT | Filing | Apr 22, 2013 | — |
| EFFECT | Filing | Apr 17, 2013 | — |
| CORRESP | Letter to the SEC | Apr 16, 2013 | — |
| CORRESP | Letter to the SEC | Apr 4, 2013 | — |
| UPLOAD | Letter from the SEC | Apr 1, 2013 | — |
| UPLOAD | Letter from the SEC | Mar 26, 2013 | — |
| PRER14A | Filing | Mar 25, 2013 | — |
| CORRESP | Letter to the SEC | Mar 25, 2013 | — |
| UPLOAD | Letter from the SEC | Mar 20, 2013 | — |
| D | Filing | Mar 8, 2013 | — |
| NT 10-Q | Late filing notification | Sep 14, 2012 | Jul 31, 2012 |
| NT 10-Q | Notification of late filing | Sep 14, 2011 | Jul 31, 2011 |
| PRER14A | Amendment no. 1 | Aug 26, 2011 | — |
| NT 10-Q | Filing | Mar 14, 2011 | Jan 31, 2011 |
| NT 10-K | Notification of late filing | Jul 14, 2010 | Apr 30, 2010 |
| EFFECT | Filing | Apr 14, 2010 | — |
| UPLOAD | Letter from the SEC | Mar 29, 2010 | — |
| CORRESP | Letter to the SEC | Mar 25, 2010 | — |
| UPLOAD | Letter from the SEC | Mar 23, 2010 | — |
| NT 10-Q | Oxygen biotherapeutics nt 10q for 01/31/2010 | Mar 18, 2010 | Jan 31, 2010 |
| CORRESP | Letter to the SEC | Mar 3, 2010 | — |
| CORRESP | Letter to the SEC | Feb 19, 2010 | — |
| UPLOAD | Letter from the SEC | Feb 19, 2010 | — |
| CERTNAS | Auto-generated paper document | Jan 13, 2010 | — |
| 8-A12B | Oxygen biotherapeutics 8a/12b | Jan 11, 2010 | — |
| NT 10-Q | Notification of late filing | Sep 15, 2009 | Jul 31, 2009 |
| NT 10-K | Filing | Jul 29, 2009 | Apr 30, 2009 |
| D | Filing | Jun 22, 2009 | — |
| D | Filing | Jun 10, 2009 | — |
| UPLOAD | Letter from the SEC | Feb 4, 2009 | — |
| CORRESP | Letter to the SEC | Jan 27, 2009 | — |
| UPLOAD | Letter from the SEC | Jan 16, 2009 | — |
| NT 10-Q | Filing | Dec 15, 2008 | Oct 31, 2008 |
| RW | Filing | Dec 1, 2008 | — |
| NT 10-Q | Filing | Sep 15, 2008 | Jul 31, 2008 |
| NT 10-K | Filing | Jul 30, 2008 | Apr 30, 2008 |
| 10QSB | Form 10-qsb | Mar 21, 2008 | Jan 31, 2008 |
| NT 10-Q | Filing | Mar 17, 2008 | Jan 31, 2008 |
| REGDEX/A | Auto-generated paper document | Mar 12, 2008 | — |
| REGDEX | Auto-generated paper document | Jan 29, 2008 | — |
| 10QSB | Form 10-qsb | Dec 17, 2007 | Oct 31, 2007 |
| 10QSB | Form 10-qsb | Sep 19, 2007 | Jul 31, 2007 |
| NT 10-Q | Filing | Sep 14, 2007 | Jul 31, 2007 |
| NT 10-K | Filing | Jul 30, 2007 | Apr 30, 2007 |
| NT 10-Q | Notification of late filing | Sep 14, 2006 | Jul 31, 2006 |
| EFFECT | Filing | Aug 10, 2006 | — |
| REGDEX | Auto-generated paper document | Aug 8, 2005 | — |
| NT 10-K | Notification of late filing | Jul 29, 2005 | Apr 30, 2005 |
| CORRESP | Letter to the SEC | Jan 26, 2005 | — |
| UPLOAD | Letter from the SEC | Jan 25, 2005 | — |
| REGDEX | Auto-generated paper document | Dec 14, 2004 | — |
| CORRESP | Letter to the SEC | Sep 8, 2004 | — |
| UPLOAD | Letter from the SEC | Sep 8, 2004 | — |
| NT 10-K | Form nt 10-k for synthetic blood international | Jul 30, 2004 | Apr 30, 2004 |
| NT 10-Q | Form 12b-25 | Dec 15, 2003 | Oct 31, 2003 |
| NT 10-Q | Form 12b-25 | Sep 15, 2003 | Jul 31, 2003 |
| 10QSB | 7-31-2001 10qsb | Sep 12, 2001 | Jul 31, 2001 |
| 10KSB | Synthetic blood 10-ksb | Jul 25, 2001 | Apr 30, 2001 |
| 10-K405 | Form 10-k for period ended 4/30/2000 | Aug 3, 2000 | Apr 30, 2000 |
| NT 10-K | Form 12b-25 | Jul 31, 2000 | Apr 30, 2000 |
| 10-K405 | Form 10-k | Sep 1, 1999 | Apr 30, 1999 |
| NTN 10K | Form 12b-25 | Aug 4, 1999 | Apr 30, 1999 |
| 10-K405 | Form 10-k405 | Jul 29, 1998 | Apr 30, 1998 |
| 10-K405 | Form 10-k405 | Jul 29, 1997 | Apr 30, 1997 |
| 10-K405 | Form 10-k for the fiscal year ended 04-30-96 | Aug 2, 1996 | Apr 30, 1996 |
Showing 129 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- TENX (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Chapel Hill, NC
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 34956
- Former names
- OXYGEN BIOTHERAPEUTICS, INC. (until Sep 15, 2014); SYNTHETIC BLOOD INTERNATIONAL INC (until Jun 30, 2008)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.