GT Biopharma, Inc. SEC filings GTBP
GT Biopharma, Inc. has 883 filings in SEC EDGAR's recent list, going back to May 12, 1995. Its latest annual report, Form 10-K, was filed on Mar 2, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 14, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Sep 25, 2026 (other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| EFFECT | Filing | Oct 20, 2026 | — |
| D | Filing | Sep 29, 2026 | — |
| EFFECT | Filing | May 13, 2026 | — |
| CORRESP | Letter to the SEC | May 11, 2026 | — |
| UPLOAD | Letter from the SEC | May 6, 2026 | — |
| EFFECT | Filing | Jan 30, 2026 | — |
| CORRESP | Letter to the SEC | Jan 28, 2026 | — |
| UPLOAD | Letter from the SEC | Jan 27, 2026 | — |
| EFFECT | Filing | Dec 2, 2025 | — |
| CORRESP | Letter to the SEC | Dec 2, 2025 | — |
| EFFECT | Filing | Jul 2, 2025 | — |
| CORRESP | Letter to the SEC | Jul 1, 2025 | — |
| CORRESP | Letter to the SEC | Jun 27, 2025 | — |
| UPLOAD | Letter from the SEC | Jun 20, 2025 | — |
| D | Filing | May 28, 2025 | — |
| D | Filing | May 27, 2025 | — |
| EFFECT | Filing | Mar 13, 2025 | — |
| CORRESP | Letter to the SEC | Mar 11, 2025 | — |
| UPLOAD | Letter from the SEC | Mar 11, 2025 | — |
| D | Filing | Mar 7, 2025 | — |
| RW | Filing | Feb 24, 2025 | — |
| EFFECT | Filing | Jun 28, 2024 | — |
| CORRESP | Letter to the SEC | Jun 27, 2024 | — |
| UPLOAD | Letter from the SEC | Jun 24, 2024 | — |
| DEFR14A | Filing | May 5, 2023 | — |
| EFFECT | Filing | Oct 20, 2022 | — |
| UPLOAD | Letter from the SEC | Oct 19, 2022 | — |
| CORRESP | Letter to the SEC | Oct 18, 2022 | — |
| UPLOAD | Letter from the SEC | Jan 26, 2022 | — |
| CORRESP | Letter to the SEC | Dec 29, 2021 | — |
| UPLOAD | Letter from the SEC | Dec 15, 2021 | — |
| NT 10-Q | Filing | Aug 17, 2021 | Jun 30, 2021 |
| EFFECT | Filing | Apr 27, 2021 | — |
| UPLOAD | Letter from the SEC | Apr 23, 2021 | — |
| CORRESP | Letter to the SEC | Apr 23, 2021 | — |
| EFFECT | Filing | Apr 22, 2021 | — |
| NT 10-K | Filing | Mar 31, 2021 | Dec 31, 2020 |
| EFFECT | Filing | Feb 10, 2021 | — |
| CERT | Filing | Feb 10, 2021 | — |
| CORRESP | Letter to the SEC | Feb 9, 2021 | — |
| 8-A12B | Filing | Feb 8, 2021 | — |
| CORRESP | Letter to the SEC | Feb 8, 2021 | — |
| UPLOAD | Letter from the SEC | Dec 16, 2020 | — |
| EFFECT | Filing | Jul 28, 2020 | — |
| CORRESP | Letter to the SEC | Jul 24, 2020 | — |
| D/A | Filing | Jul 23, 2020 | — |
| UPLOAD | Letter from the SEC | Jul 22, 2020 | — |
| D | Filing | Jun 12, 2020 | — |
| EFFECT | Filing | Oct 2, 2019 | — |
| CORRESP | Letter to the SEC | Sep 26, 2019 | — |
| UPLOAD | Letter from the SEC | Sep 20, 2019 | — |
| EFFECT | Filing | Jul 12, 2019 | — |
| CORRESP | Letter to the SEC | Jul 8, 2019 | — |
| UPLOAD | Letter from the SEC | Jul 2, 2019 | — |
| EFFECT | Filing | Mar 11, 2019 | — |
| CORRESP | Letter to the SEC | Mar 5, 2019 | — |
| UPLOAD | Letter from the SEC | Feb 28, 2019 | — |
| D | Filing | Aug 17, 2018 | — |
| EFFECT | Filing | Mar 22, 2018 | — |
| EFFECT | Filing | Mar 22, 2018 | — |
| CORRESP | Letter to the SEC | Mar 21, 2018 | — |
| CORRESP | Letter to the SEC | Mar 21, 2018 | — |
| CORRESP | Letter to the SEC | Mar 15, 2018 | — |
| UPLOAD | Letter from the SEC | Mar 12, 2018 | — |
| UPLOAD | Letter from the SEC | Mar 12, 2018 | — |
| D | Filing | Feb 6, 2018 | — |
| D | Filing | Sep 14, 2017 | — |
| RW | Oxis withdrawal of registration statement | Jul 24, 2017 | — |
| UPLOAD | Letter from the SEC | May 9, 2017 | — |
| PRER14C | Oxis pre14c revision 3 | May 5, 2017 | — |
| PRER14C | Oxis pre 14c revision 2 | Apr 24, 2017 | — |
| UPLOAD | Letter from the SEC | Apr 20, 2017 | — |
| PRER14C | Oxis revised pre 14c | Apr 14, 2017 | — |
| UPLOAD | Letter from the SEC | Apr 6, 2017 | — |
| D | Filing | Jul 27, 2015 | — |
| D | Filing | Mar 16, 2015 | — |
| D | Filing | Jul 31, 2014 | — |
| NT 10-K | Oxis notification of late filing | Apr 1, 2013 | Dec 31, 2012 |
| NT 10-Q | Oxis notification of late filing | Nov 15, 2012 | Sep 30, 2012 |
| NT 10-Q | Notification of late filing | Aug 14, 2012 | Jun 30, 2012 |
| NT 10-Q | Filing | May 15, 2012 | Mar 31, 2012 |
| NT 10-K | Oxis nt 10-k 12-31-2011 | Mar 30, 2012 | Dec 31, 2011 |
| NT 10-Q | Oxis nt 10-q 9-30-2011 | Nov 15, 2011 | Sep 30, 2011 |
| NT 10-Q | Oxis nt 10-q 6-30-2011 | Aug 15, 2011 | Jun 30, 2011 |
| UPLOAD | Letter from the SEC | Jul 13, 2011 | — |
| CORRESP | Letter to the SEC | Jul 12, 2011 | — |
| UPLOAD | Letter from the SEC | Jul 12, 2011 | — |
| UPLOAD | Letter from the SEC | Jan 19, 2011 | — |
| CORRESP | Letter to the SEC | Dec 17, 2010 | — |
| UPLOAD | Letter from the SEC | Dec 6, 2010 | — |
| NT 10-Q | Filing | Nov 16, 2009 | Sep 30, 2009 |
| NT 10-Q | Oxis nt 10-q 5-15-09 | May 15, 2009 | Mar 31, 2009 |
| NT 10-K/A | Oxis nt 10-k/a | Apr 1, 2009 | Dec 31, 2008 |
| NT 10-K | Oxis nt 10-k | Mar 31, 2009 | Dec 31, 2008 |
| NT 10-Q | Oxis nt 10q 11-14-08 | Nov 14, 2008 | Sep 30, 2008 |
| 10QSB | Oxis form 10-qsb 6-30-08 | Aug 19, 2008 | Jun 30, 2008 |
| NT 10-Q | Oxis nt 10-q 8-15-08 | Aug 14, 2008 | Jun 30, 2008 |
| 10QSB | Oxis 10-qsb 3-31-08 | May 20, 2008 | Mar 31, 2008 |
| NT 10-Q | Oxis nt 10-q 5-15-08 | May 15, 2008 | May 15, 2008 |
| 10KSB | Oxis form 10-ksb 12-31-07 | Apr 11, 2008 | Dec 31, 2007 |
| NT 10-K | Filing | Mar 31, 2008 | Dec 31, 2007 |
| 10QSB | Oxis 10-qsb 9-30-2007 | Nov 14, 2007 | Sep 30, 2007 |
| 10QSB | Oxis 10-qsb 06-30-07 | Aug 14, 2007 | Jun 30, 2007 |
| EFFECT | Filing | May 25, 2007 | — |
| EFFECT | Filing | May 25, 2007 | — |
| CORRESP | Letter to the SEC | May 21, 2007 | — |
| 10KSB/A | Oxis annual report on form 10-ksb/a | May 21, 2007 | Dec 31, 2006 |
| 10QSB | Oxis form 10-qsb 3-31-07 | May 15, 2007 | Mar 31, 2007 |
| CORRESP | Letter to the SEC | May 11, 2007 | — |
| UPLOAD | Letter from the SEC | May 11, 2007 | — |
| UPLOAD | Letter from the SEC | May 11, 2007 | — |
| 10KSB | Form 10-ksb 12-31-2006 | Apr 17, 2007 | Dec 31, 2006 |
| NT 10-K | Filing | Apr 2, 2007 | Dec 31, 2006 |
| EFFECT | Filing | Feb 12, 2007 | — |
| CORRESP | Letter to the SEC | Feb 9, 2007 | — |
| CORRESP | Letter to the SEC | Feb 9, 2007 | — |
| SB-2/A | Filing | Feb 9, 2007 | — |
| SB-2/A | Filing | Jan 23, 2007 | — |
| SB-2/A | Filing | Jan 11, 2007 | — |
| UPLOAD | Letter from the SEC | Dec 20, 2006 | — |
| SB-2 | Filing | Dec 8, 2006 | — |
| 10QSB | Oxis form 10-qsb q3 2006 | Nov 14, 2006 | Sep 30, 2006 |
| REGDEX | Auto-generated paper document | Nov 7, 2006 | — |
| 10QSB | Oxis 10qsb q2 2006 | Aug 14, 2006 | Jun 30, 2006 |
| CORRESP | Letter to the SEC | Jun 9, 2006 | — |
| PRER14A | Amended preliminary proxy | Jun 9, 2006 | — |
| UPLOAD | Letter from the SEC | Jun 7, 2006 | — |
| 10QSB | 10-qsb for q1 2006 | May 12, 2006 | Mar 31, 2006 |
| 10KSB | Filing | Mar 31, 2006 | Dec 31, 2005 |
| 10QSB | Filing | Nov 14, 2005 | Sep 30, 2005 |
| 10QSB | Quarterly report | Aug 15, 2005 | Jun 30, 2005 |
| 10KSB/A | Form 10-ksb/a | Jun 16, 2005 | Dec 31, 2004 |
| 10QSB/A | Form 10qsb/a | Jun 15, 2005 | Mar 31, 2005 |
| 10QSB/A | Form 10-qsb/a | May 26, 2005 | Sep 30, 2004 |
| SB-2/A | Form sb-2 amendment no. 3 | May 25, 2005 | — |
| SB-2/A | Amendment no. 2 to form sb-2 | May 18, 2005 | — |
| 10QSB | Form 10-qsb | May 13, 2005 | Mar 31, 2005 |
| SB-2/A | Amendment no. 1 to form sb-2 | Apr 29, 2005 | — |
| REGDEX | Auto-generated paper document | Mar 11, 2005 | — |
| SB-2 | Form sb-2 | Feb 25, 2005 | — |
| 10KSB | Form 10ksb | Feb 25, 2005 | Dec 31, 2004 |
| REGDEX | Auto-generated paper document | Jan 21, 2005 | — |
| REGDEX | Auto-generated paper document | Jan 14, 2005 | — |
| 10QSB | Form 10qsb | Nov 12, 2004 | Sep 30, 2004 |
| 10QSB | For the period ended june 30, 2004. | Aug 6, 2004 | Jun 30, 2004 |
| 10QSB | Form 10-qsb | May 14, 2004 | Mar 31, 2004 |
| SC 14F1 | Information statement | Apr 15, 2004 | — |
| 10KSB | Form 10ksb | Mar 26, 2004 | Dec 31, 2003 |
| 10QSB | Form 10-qsb | Nov 14, 2003 | Sep 30, 2003 |
| 10QSB | Form 10-qsb | Aug 14, 2003 | Jun 30, 2003 |
| 10QSB | Form 10-qsb | May 15, 2003 | Mar 31, 2003 |
| 10KSB | Form 10ksb for fiscal year ended 12/31/2002 | Mar 31, 2003 | Dec 31, 2002 |
| 10QSB | Form 10qsb for quarterly period ended 09/30/2002 | Nov 14, 2002 | Sep 30, 2002 |
| 10QSB | Form 10qsb for quarterly period ended 06/30/2002 | Aug 14, 2002 | Jun 30, 2002 |
| 10QSB | Form 10qsb for quarterly period ended 03/31/2002 | May 15, 2002 | Mar 31, 2002 |
| 10KSB | Form 10-ksb | Apr 1, 2002 | Dec 31, 2001 |
| 10-K405 | Form 10-k for fiscal year ended december 31, 1999 | Mar 30, 2000 | Dec 31, 1999 |
| DEFR14A | Revised notice & proxy statement | Oct 19, 1999 | — |
| PRER14A | Preliminary proxy materials revised | May 28, 1998 | — |
| PRER14A | Preliminary proxy materials revised | May 8, 1998 | — |
| 10-C | Form 10-c dated 07/19/95 | Jul 28, 1995 | Jul 19, 1995 |
| 10-C | Form 10-c | Jun 8, 1995 | May 15, 1995 |
Showing 162 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
- GTBP (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- San Francisco, CA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 109657
- Former names
- GT Biopharma, Inc. (until Oct 20, 2026); OXIS INTERNATIONAL INC (until Jul 25, 2017)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.