Insider Trading for GTHP
View recent insider trading activity including purchases, sales, and awards. Insider trading can provide insights into how executives view their company's prospects.
Insider Trading Summary
Shares Acquired
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Shares Disposed
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Net Position
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Recent Activity (30 Days)
No insider transactions in the past 30 days.
Quarterly Activity (3 Months)
No insider transactions in the past 3 months.
Key Insider Activity: Jul 9, 2024 to Mar 31, 2026
Imhoff John E
DirectorDirector, 10 Percent Owner:
+19.8M shares
49 transactions
Blumberg Richard P.
DirectorDirector, 10 Percent Owner:
+3.6M shares
24 transactions
Grujic Alan
DirectorDirector
+103.2K shares
11 transactions
JAMES MICHAEL C
DirectorDirector
+1.2M shares
16 transactions
Transaction Details
| Date | Insider | Role | Transaction | Shares | Price | Value | Owned After | SEC Filing |
|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | Imhoff John E | DDirector, 10 Percent Owner: | C-Conversion | 157.4K | $0.07 | $11,019.19 | 21.3M | View |
| Mar 31, 2026 | Imhoff John E | DDirector, 10 Percent Owner: | C-Conversion | 157.4K | $0.07 | $11,019.19 | 110.0K | View |
| Mar 26, 2026 | Blumberg Richard P. | DDirector, 10 Percent Owner: | J-Other | 352.0K | $0.00 | $0.00 | 10.4M | View |
Mar 26, 2026 | Locked | — | — | — | — | — | — | — |
Mar 26, 2026 | Locked | — | — | — | — | — | — | — |
Mar 26, 2026 | Locked | — | — | — | — | — | — | — |
Mar 26, 2026 | Locked | — | — | — | — | — | — | — |
Mar 26, 2026 | Locked | — | — | — | — | — | — | — |
Mar 26, 2026 | Locked | — | — | — | — | — | — | — |
Mar 26, 2026 | Locked | — | — | — | — | — | — | — |
Mar 26, 2026 | Locked | — | — | — | — | — | — | — |
Mar 10, 2026 | Locked | — | — | — | — | — | — | — |
Mar 10, 2026 | Locked | — | — | — | — | — | — | — |
Mar 10, 2026 | Locked | — | — | — | — | — | — | — |
Mar 10, 2026 | Locked | — | — | — | — | — | — | — |
Mar 1, 2026 | Locked | — | — | — | — | — | — | — |
Feb 27, 2026 | Locked | — | — | — | — | — | — | — |
Feb 27, 2026 | Locked | — | — | — | — | — | — | — |
Feb 27, 2026 | Locked | — | — | — | — | — | — | — |
Feb 27, 2026 | Locked | — | — | — | — | — | — | — |
Feb 25, 2026 | Locked | — | — | — | — | — | — | — |
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Feb 2, 2026 | Locked | — | — | — | — | — | — | — |
Feb 2, 2026 | Locked | — | — | — | — | — | — | — |
Jan 5, 2026 | Locked | — | — | — | — | — | — | — |
Dec 18, 2025 | Locked | — | — | — | — | — | — | — |
Dec 18, 2025 | Locked | — | — | — | — | — | — | — |
Aug 29, 2025 | Locked | — | — | — | — | — | — | — |
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Aug 29, 2025 | Locked | — | — | — | — | — | — | — |
Aug 21, 2025 | Locked | — | — | — | — | — | — | — |
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Aug 21, 2025 | Locked | — | — | — | — | — | — | — |
Aug 21, 2025 | Locked | — | — | — | — | — | — | — |
Aug 21, 2025 | Locked | — | — | — | — | — | — | — |
Jun 3, 2025 | Locked | — | — | — | — | — | — | — |
Jun 3, 2025 | Locked | — | — | — | — | — | — | — |
Jun 3, 2025 | Locked | — | — | — | — | — | — | — |
Jun 3, 2025 | Locked | — | — | — | — | — | — | — |
Apr 10, 2025 | Locked | — | — | — | — | — | — | — |
Apr 10, 2025 | Locked | — | — | — | — | — | — | — |
Apr 10, 2025 | Locked | — | — | — | — | — | — | — |
Mar 18, 2025 | Locked | — | — | — | — | — | — | — |
Mar 18, 2025 | Locked | — | — | — | — | — | — | — |
Mar 18, 2025 | Locked | — | — | — | — | — | — | — |
Mar 18, 2025 | Locked | — | — | — | — | — | — | — |
Mar 18, 2025 | Locked | — | — | — | — | — | — | — |
Mar 18, 2025 | Locked | — | — | — | — | — | — | — |
Mar 18, 2025 | Locked | — | — | — | — | — | — | — |
Mar 18, 2025 | Locked | — | — | — | — | — | — | — |
Mar 13, 2025 | Locked | — | — | — | — | — | — | — |
Mar 11, 2025 | Locked | — | — | — | — | — | — | — |
Mar 11, 2025 | Locked | — | — | — | — | — | — | — |
Mar 7, 2025 | Locked | — | — | — | — | — | — | — |
Mar 6, 2025 | Locked | — | — | — | — | — | — | — |
Mar 6, 2025 | Locked | — | — | — | — | — | — | — |
Mar 6, 2025 | Locked | — | — | — | — | — | — | — |
Mar 6, 2025 | Locked | — | — | — | — | — | — | — |
Jan 17, 2025 | Locked | — | — | — | — | — | — | — |
Dec 18, 2024 | Locked | — | — | — | — | — | — | — |
Dec 18, 2024 | Locked | — | — | — | — | — | — | — |
Oct 15, 2024 | Locked | — | — | — | — | — | — | — |
Oct 14, 2024 | Locked | — | — | — | — | — | — | — |
Sep 23, 2024 | Locked | — | — | — | — | — | — | — |
Sep 23, 2024 | Locked | — | — | — | — | — | — | — |
Sep 2, 2024 | Locked | — | — | — | — | — | — | — |
Sep 1, 2024 | Locked | — | — | — | — | — | — | — |
Aug 21, 2024 | Locked | — | — | — | — | — | — | — |
Aug 21, 2024 | Locked | — | — | — | — | — | — | — |
Aug 21, 2024 | Locked | — | — | — | — | — | — | — |
Aug 2, 2024 | Locked | — | — | — | — | — | — | — |
Jul 31, 2024 | Locked | — | — | — | — | — | — | — |
Jul 31, 2024 | Locked | — | — | — | — | — | — | — |
Jul 9, 2024 | Locked | — | — | — | — | — | — | — |
Jul 9, 2024 | Locked | — | — | — | — | — | — | — |
Jul 9, 2024 | Locked | — | — | — | — | — | — | — |
Jul 9, 2024 | Locked | — | — | — | — | — | — | — |
Click "View" in the SEC Filing column to access the detailed SEC form submission for each transaction.