GT Biopharma, Inc. (GTBP)
Nasdaq: GTBP · Pharmaceutical Preparations · San Francisco, CA · filing with the SEC since 1995
Who runs GT Biopharma, Inc.
Officers and directors as they report to the SEC on Forms 3, 4 and 5, named as filedChief executive, as filed
Breen Michael Martin
CEO and Director. First filing Feb 2021, latest Sep 8, 2025, 1 filing in all.
Officers reporting now
2
of 5 people with a filing in the last fifteen months
Directors reporting now
3
16 people on the record since 2010
Officerssales are open-market, Sep 30, 2025 to Sep 30, 2026
| Name | Title as filed | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Breen Michael Martin | CEO and Director | Feb 2021 | Sep 8, 2025 | none |
| Urban Alan Louis | Chief Financial Officer | Jun 2022 | Sep 8, 2025 | none |
Directorssales are open-market, Sep 30, 2025 to Sep 30, 2026
| Name | Role | First filing | Latest filing | Sales, 12 months |
|---|---|---|---|---|
| Casamento Charles J | director | May 2023 | Sep 8, 2025 | none |
| Kramer Hilary | director | Jun 2025 | Sep 8, 2025 | none |
| Mun-Gavin David C. | director | Jul 2025 | Sep 8, 2025 | none |
Earlier names on the record14, newest filing first
Ritter Andrew J · director · last filing May 2025Ohri Manu · officer · last filing Aug 2023Shrotriya Rajesh C Md · director · last filing Feb 2023Wendel Bruce · director · last filing Feb 2023Berk Gregory · officer · last filing Jul 2022Choy Gavin · officer · last filing Feb 2022Weldon Steven W · officer · last filing Dec 2020Cataldo Tony · officer · last filing Jun 2020Urbanski Raymond W. · officer · last filing Mar 2019Cross Shawn · officer · last filing Mar 2018Clarence-Smith Kathleen · officer · last filing Dec 2017Silverman Mark J · 10% owner · last filing Dec 2017Bristol Investment Fund Ltd · 10% owner · last filing Apr 2016Bristol Capital LLC · 10% owner · last filing Jan 2016
A person is listed as reporting now after a filing in the last fifteen months. The record shows when someone last filed; it does not say why they stopped. Each name links to the filings on sec.gov.