GT Biopharma, Inc. (GTBP)

Latest Insider Confidence Score

2025Q4

50.0
Bullish

Company insider confidence (by quarter)

2003Q3 2025Q4

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Saloff David 26,334,193 May 30, 2012
Axonyx Inc 15,074,103 Jan 20, 2004
Clarence-Smith Kathleen 8,505,633 Dec 1, 2017
Silverman Mark J 8,172,079 Dec 1, 2017
Cataldo Tony CEO 6,500,000 Jun 4, 2020

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Sep 4, 2025 Sep 8, 2025 Mun-Gavin David C. Director Neutral 52.5 - 0.00% -
Sep 4, 2025 Sep 8, 2025 Breen Michael Martin CEO Neutral 52.5 - 0.00% -
Sep 4, 2025 Sep 8, 2025 URBAN ALAN LOUIS CFO Neutral 52.5 - 0.00% -
Sep 4, 2025 Sep 8, 2025 CASAMENTO CHARLES J Director Neutral 52.5 - 0.00% -
Sep 4, 2025 Sep 8, 2025 Kramer Hilary Director Neutral 52.5 - 0.00% -
Jul 30, 2025 Mun-Gavin David C. Director Neutral 52.5 - 0.00% -
Jun 3, 2025 Kramer Hilary Director Neutral 52.5 - 0.00% -
May 29, 2025 Ritter Andrew J Director Neutral 52.5 - 0.00% -
Oct 17, 2024 Oct 21, 2024 URBAN ALAN LOUIS CFO Neutral 52.5 - 0.00% -
Jun 13, 2024 URBAN ALAN LOUIS CFO Neutral 52.5 - 0.00% -
Aug 11, 2023 Aug 15, 2023 Breen Michael Martin CEO Neutral 90.0 +200,000 30.48% -
Aug 11, 2023 Aug 15, 2023 Ohri Manu CFO Neutral 90.0 +200,000 133.33% -
Jun 16, 2023 Jun 21, 2023 CASAMENTO CHARLES J Director Neutral 52.5 - 0.00% -
May 4, 2023 CASAMENTO CHARLES J Director Neutral 52.5 - 0.00% -
Apr 11, 2023 Apr 11, 2023 Breen Michael Martin CEO Buy 86.3 +50,000 8.25% $25K
Apr 6, 2023 Apr 10, 2023 Ohri Manu CFO Buy 91.3 +50,000 50.00% $25K
Jan 27, 2023 Feb 1, 2023 Breen Michael Martin CEO Neutral 52.5 - 0.00% -
Jan 27, 2023 Feb 1, 2023 Ohri Manu CFO Neutral 52.5 - 0.00% -
Jan 27, 2023 Feb 1, 2023 SHROTRIYA RAJESH C MD Director Neutral 52.5 - 0.00% -
Jan 27, 2023 Feb 1, 2023 Wendel Bruce Director Neutral 52.5 - 0.00% -
Jul 15, 2022 Jul 19, 2022 Breen Michael Martin CEO Neutral 90.0 +278,058 84.73% -
Jul 15, 2022 Jul 19, 2022 SHROTRIYA RAJESH C MD Director Neutral 52.5 - 0.00% -
Jul 15, 2022 Jul 19, 2022 URBAN ALAN LOUIS Director Neutral 52.5 - 0.00% -
Jul 15, 2022 Jul 19, 2022 Berk Gregory Pres. of R&D, CMO Neutral 52.5 - 0.00% -
Jul 15, 2022 Jul 19, 2022 Ohri Manu CFO Neutral 90.0 +100,000 100.00% -
Jul 15, 2022 Jul 19, 2022 Wendel Bruce Director Neutral 52.5 - 0.00% -
Jun 14, 2022 URBAN ALAN LOUIS Director Neutral 52.5 - 0.00% -
Feb 18, 2022 Ohri Manu CFO Neutral 52.5 - 0.00% -
Feb 16, 2021 Feb 14, 2022 Berk Gregory Director Neutral 90.0 +278,058 100.00% -
Feb 16, 2021 Feb 14, 2022 SHROTRIYA RAJESH C MD Director Neutral 52.5 - 0.00% -
Dec 31, 2021 Feb 14, 2022 Choy Gavin CFO Neutral 52.5 - 0.00% -
Feb 14, 2022 Berk Gregory Director Neutral 52.5 - 0.00% -
Feb 14, 2022 Choy Gavin CFO Neutral 52.5 - 0.00% -
Feb 14, 2022 SHROTRIYA RAJESH C MD Director Neutral 52.5 - 0.00% -
Feb 16, 2021 Nov 12, 2021 Breen Michael Martin Director Neutral 90.0 +278,058 100.00% -
Nov 12, 2021 Breen Michael Martin Director Neutral 52.5 - 0.00% -
Nov 16, 2020 Oct 7, 2021 Wendel Bruce Director Buy 91.3 +352,655 100.00% $26.3K
Oct 7, 2021 Wendel Bruce Director Neutral 52.5 - 0.00% -
Dec 21, 2020 Dec 23, 2020 Weldon Steven W Other Sell 37.5 -183,700 -4.71% $62.8K
Dec 16, 2020 Dec 18, 2020 Weldon Steven W Other Sell 37.5 -200,000 -4.87% $60.5K
Dec 11, 2020 Dec 15, 2020 Weldon Steven W Other Sell 28.8 -396,300 -8.81% $113.4K
Jun 2, 2020 Jun 4, 2020 Cataldo Tony CEO Sell 27.5 -4,234,320 -39.45% $4.2K
May 13, 2020 May 14, 2020 Weldon Steven W CFO Sell 27.5 -2,269,708 -33.53% $2.3K
Aug 14, 2019 Aug 16, 2019 Cataldo Tony CEO Neutral 90.0 +7,000,000 187.45% -
Aug 14, 2019 Aug 16, 2019 Weldon Steven W CFO Neutral 90.0 +4,500,000 198.26% -
Feb 1, 2019 Mar 19, 2019 Urbanski Raymond W. CEO Sell 27.5 -176,980 -11.58% $177
Feb 6, 2019 Feb 13, 2019 Cataldo Tony Director Sell 27.5 -800,000 -16.56% $800
Mar 16, 2018 Cross Shawn CEO Neutral 52.5 - 0.00% -
Sep 1, 2017 Dec 1, 2017 Cataldo Tony Chair Neutral 90.0 +1,829,660 13685.84% -
Dec 1, 2017 Urbanski Raymond W. Chief Medical Officer Neutral 52.5 - 0.00% -
Dec 1, 2017 Clarence-Smith Kathleen CEO Neutral 52.5 - 0.00% -
Sep 1, 2017 Dec 1, 2017 Weldon Steven W CFO Neutral 90.0 +2,566,835 128021.70% -
Dec 1, 2017 Silverman Mark J 10% Owner Neutral 52.5 - 0.00% -
Apr 4, 2016 Apr 5, 2016 BRISTOL INVESTMENT FUND LTD 10% Owner Sell 15.0 -425,000 -17.60% $205B
Mar 2, 2016 BRISTOL INVESTMENT FUND LTD 10% Owner Neutral 52.5 - 0.00% -
Feb 23, 2016 Cataldo Tony CEO Neutral 52.5 - 0.00% -
Feb 12, 2016 Weldon Steven W CFO Neutral 52.5 - 0.00% -
Jan 25, 2016 BRISTOL INVESTMENT FUND LTD 10% Owner Neutral 52.5 - 0.00% -
Mar 1, 2012 May 30, 2012 Saloff David CEO Neutral 52.5 - 0.00% -
Aug 31, 2011 Sep 1, 2011 Saloff David CEO Neutral 52.5 - 0.00% -
Jul 11, 2011 Saloff David Director Neutral 52.5 - 0.00% -
Jul 7, 2011 Eaton Kenneth Haynes Director Neutral 52.5 - 0.00% -
May 20, 2011 May 24, 2011 DUBE ANSHUMAN Director Neutral 52.5 - 0.00% -
Feb 8, 2011 HOOG THOMAS W Director Neutral 52.5 - 0.00% -
Dec 23, 2010 Jan 19, 2011 DUBE ANSHUMAN Director Sell 22.5 -700,000 -100.00% $91.4K
Dec 23, 2010 Jan 19, 2011 Theorem Group, LLC 10% Owner Sell 22.5 -700,000 -100.00% $91.4K
Jan 19, 2011 DUBE ANSHUMAN Director Neutral 52.5 - 0.00% -
Jan 19, 2011 Theorem Group, LLC 10% Owner Neutral 52.5 - 0.00% -
Aug 31, 2010 Sep 2, 2010 Post Gary M Other Sell 27.5 -69,600 -7.18% $7.7K
Aug 26, 2010 Aug 30, 2010 Post Gary M Other Sell 26.3 -107,000 -9.94% $12.4K
Jul 7, 2010 Jul 12, 2010 Post Gary M Secretary Sell 26.3 -423,400 -28.23% $43.9K
Apr 6, 2010 Cataldo Tony CEO Neutral 52.5 - 0.00% -
Jan 19, 2010 Apr 6, 2010 Post Gary M Director Neutral 90.0 +1,500,000 100.00% -
Mar 25, 2010 Theorem Group, LLC 10% Owner Neutral 52.5 - 0.00% -
Mar 25, 2010 DUBE ANSHUMAN Director Neutral 52.5 - 0.00% -
Mar 22, 2010 Handelman Michael D CFO Neutral 52.5 - 0.00% -
Mar 22, 2010 Landes Bernard President Neutral 52.5 - 0.00% -
Nov 28, 2007 Feb 8, 2008 HAUSMAN MARVIN S MD CEO Neutral 27.5 -60,000 -2.50% -
Nov 9, 2007 Nov 13, 2007 REPINE JOHN E Director Neutral 52.5 - 0.00% -
Nov 9, 2007 Nov 13, 2007 Post Gary M COO Neutral 52.5 - 0.00% -
Nov 9, 2007 Nov 13, 2007 SPOLAR MATTHEW R Director Neutral 52.5 - 0.00% -
Nov 9, 2007 Nov 13, 2007 NEILL SYDNEY COLIN Director Neutral 52.5 - 0.00% -
Jan 11, 2007 Jan 19, 2007 SPOLAR MATTHEW R Director Neutral 52.5 - 0.00% -
Jan 19, 2007 SPOLAR MATTHEW R Director Neutral 52.5 - 0.00% -
Nov 6, 2006 Nov 8, 2006 NEILL SYDNEY COLIN Secretary Neutral 52.5 - 0.00% -
Nov 6, 2006 Nov 8, 2006 REPINE JOHN E Director Neutral 90.0 +50,000 100.00% -
Nov 6, 2006 Nov 8, 2006 Post Gary M Director Neutral 52.5 - 0.00% -
Nov 6, 2006 Nov 8, 2006 HAUSMAN MARVIN S MD CEO Neutral 90.0 +916,666 61.63% -
Oct 12, 2006 Oct 16, 2006 Post Gary M Director Neutral 52.5 - 0.00% -
Oct 12, 2006 Oct 16, 2006 REPINE JOHN E Director Neutral 52.5 - 0.00% -
Oct 12, 2006 Oct 16, 2006 HAUSMAN MARVIN S MD CEO Neutral 90.0 +330,769 100.00% -
Aug 1, 2006 Aug 2, 2006 CENTRON MICHAEL D CFO Neutral 52.5 - 0.00% -
Aug 1, 2006 Aug 2, 2006 REPINE JOHN E Director Neutral 52.5 - 0.00% -
Aug 1, 2006 Aug 2, 2006 HAUSMAN MARVIN S MD Director Neutral 52.5 - 0.00% -
Aug 1, 2006 Aug 2, 2006 NEILL SYDNEY COLIN Director Neutral 52.5 - 0.00% -
Aug 1, 2006 Aug 2, 2006 Post Gary M Director Neutral 52.5 - 0.00% -
May 12, 2006 May 23, 2006 Post Gary M Director Neutral 52.5 - 0.00% -
Mar 23, 2006 Post Gary M Director Neutral 52.5 - 0.00% -
Jan 10, 2006 CENTRON MICHAEL D CFO Neutral 52.5 - 0.00% -
Dec 28, 2005 Dec 30, 2005 REPINE JOHN E Director Neutral 52.5 - 0.00% -