| $350M | ||
| $217M | ||
| $172M | ||
| $109M | ||
| $107M | ||
| $104M |
Buys | $0 | 0 | – |
Sells | $0 | 0 | – |
GT Biopharma, Inc. is a biopharmaceutical company in the clinical development phase, dedicated to discovering and bringing to market novel immuno-oncology treatments. Their innovative approach centers on a proprietary technology platform called Tri-specific Killer Engager (TriKE) fusion proteins, which are designed to harness the body's immune cells. Central to their pipeline is GTB-3550, a single-chain tri-specific recombinant fusion protein conjugate currently undergoing Phase I/II clinical trials. This therapeutic candidate is being …
Over the last 12 months, insiders at GT Biopharma, Inc. have bought $0 and sold $0 worth of GT Biopharma, Inc. stock.
On average, over the past 5 years, insiders at GT Biopharma, Inc. have bought $50,000 and sold $0 worth of stock each year.
There was no buying activity among insiders over the last 12 months.
The last purchase of 50,000 shares for transaction amount of $25,000 was made by Breen Michael Martin (Executive Chairman/Interim CEO) on 2023‑04‑11.
| 2023-04-11 | Breen Michael Martin | Executive Chairman/Interim CEO | 50,000 0.123% | $0.50 | $25,000 | -51.54% | ||
| 2023-04-06 | Ohri Manu | CFO & Secretary | 50,000 0.139% | $0.50 | $25,000 | -44.78% | ||
| 2020-12-22 | Sale | Weldon Steven W | 47,978 0.0139% | $0.40 | $19,191 | -7.75% | ||
| 2020-12-22 | Wendel Bruce | 1,815 0.0116% | $8.84 | $16,037 | -7.75% | |||
| 2020-12-21 | Sale | Weldon Steven W | 135,722 0.0465% | $0.32 | $43,645 | +36.27% | ||
| 2020-12-18 | Sale | Weldon Steven W | 50,000 0.018% | $0.30 | $15,000 | +53.68% | ||
| 2020-12-17 | Sale | Weldon Steven W | 100,000 0.0357% | $0.30 | $30,500 | +49.56% | ||
| 2020-12-16 | Sale | Weldon Steven W | 50,000 0.0184% | $0.30 | $15,000 | +57.16% | ||
| 2020-12-15 | Sale | Weldon Steven W | 150,000 0.0538% | $0.31 | $46,000 | +49.46% | ||
| 2020-12-14 | Sale | Weldon Steven W | 146,300 0.0524% | $0.29 | $41,927 | +59.77% | ||
| 2020-12-11 | Sale | Weldon Steven W | 100,000 0.0342% | $0.26 | $25,500 | +71.90% | ||
| 2020-11-16 | Wendel Bruce | 3,268 0.0201% | $3.14 | $10,262 | +150.45% | |||
| 2020-06-02 | Sale | Cataldo Tony | CEO | 4.23M 0.0294% | $0.00 | $4,234 | +15.02% | |
| 2020-05-13 | Sale | Weldon Steven W | CFO | 2.27M 0.0175% | $0.00 | $2,270 | +17.36% | |
| 2019-02-06 | Sale | Cataldo Tony | director | 800,000 0.0025% | $0.00 | $800 | -68.50% | |
| 2019-02-01 | Sale | Urbanski Raymond W. | CEO | 176,980 0.0005% | $0.00 | $177 | -69.87% | |
| 2010-12-27 | Sale | Theorem Group, LLC | 10 percent owner | 360,100 0.0475% | $0.13 | $47,209 | ||
| 2010-12-27 | Sale | DUBE ANSHUMAN | 360,100 0.0475% | $0.13 | $47,209 | |||
| 2010-12-23 | Sale | Theorem Group, LLC | 10 percent owner | 339,900 0.0445% | $0.13 | $44,187 | ||
| 2010-12-23 | Sale | DUBE ANSHUMAN | 339,900 0.0445% | $0.13 | $44,187 |
| Increased Positions | 25 | +80.65% | 360,821 | +96.42% |
| Decreased Positions | 13 | -41.94% | 252,027 | -67.35% |
| New Positions | 22 | New | 309,084 | New |
| Sold Out Positions | 5 | Sold Out | 154,059 | Sold Out |
| Total Postitions | 43 | +38.71% | 483,011 | +29.07% |
| Drw Securities, Llc | $116.00 | 1.29% | 142,380 | +142,380 | New | 2025-09-30 |
| Bank Of Montreal /Can/ | $76.00 | 0.84% | 92,530 | 0 | 0% | 2025-09-30 |
| Citadel Advisors Llc | $32.00 | 0.36% | 39,633 | +39,633 | New | 2025-09-30 |
| Geode Capital Management, Llc | $20.00 | 0.22% | 23,966 | +129 | +0.54% | 2025-09-30 |
| Two Sigma Securities, Llc | $14.00 | 0.16% | 17,065 | +17,065 | New | 2025-09-30 |
| Morgan Stanley | $11.00 | 0.13% | 14,015 | +10,000 | +249.07% | 2025-09-30 |
| Vanguard Group Inc | $9.00 | 0.1% | 10,504 | 0 | 0% | 2025-09-30 |
| Wells Fargo & Company/Mn | $8.00 | 0.09% | 10,012 | 0 | 0% | 2025-09-30 |
| Blackrock, Inc. | $8.00 | 0.09% | 9,737 | 0 | 0% | 2025-09-30 |
| Osaic Holdings, Inc. | $4.00 | 0.05% | 5,073 | -6,383 | -55.72% | 2025-09-30 |