Insiders / Breen Michael Martin
Breen Michael Martin
CIK 1863633personinsider
Companies
2
First seen
Nov 12, 2021
Last activity
Sep 8, 2025
Companies
| Company | Shares held | Latest |
|---|---|---|
| Prairie Operating Co. · CRKR | 1,144,683 | — |
| GT Biopharma, Inc. · GTBP | 856,218 | — |
All securities held
6 positions · latest reported per filing
Shares
| Company | Security | Shares |
|---|---|---|
| GT Biopharma, Inc. | Common stock | 856,218 |
| Prairie Operating Co. | Common stock | 1,144,683 |
Derivatives
| Company | Security | Shares |
|---|---|---|
| GT Biopharma, Inc. | Options | 500,000 |
| Prairie Operating Co. | Options | 67,500 |
Other
| Company | Security | Shares |
|---|---|---|
| GT Biopharma, Inc. | Unclassified | 328,160 |
| GT Biopharma, Inc. | Unclassified | 100,000 |
Ownership percentages elsewhere on the site count common and ordinary shares only, because that is what shares outstanding are measured in. Everything above is a real holding; not all of it is a share of the company.
Activity
InsidersInstitutions
This person's trades in company stock, across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Feb 25, 2021 | Other Derivative conversion | GTBP GT Biopharma, Inc. Common Stock | $136.8K | +40K +14.47% | 318,301 | low |
| May 3, 2023 | Buy Open-market buy | CRKR Prairie Operating Co. Common Stock | $99.9K | +916K +9161.12% | 926,112 0.95% of shares | medium |
| Aug 11, 2023 | Grant Grant or award | GTBP GT Biopharma, Inc. Common Stock | $57.4K |