As of March 23, 2026, the three largest insider holders of TGTX are Michael S Weiss (Ceo, 9.78Mn shares), Sean A Power (Cfo, 798.11K shares), Kenneth Hoberman (Director, 279.65K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Michael S Weiss | Ceo | 9,778,086 | 0 | 09 Jan, 2026 |
| Sean A Power | Cfo | 798,111 | 0 | 09 Jan, 2026 |
| Kenneth Hoberman | 279,653 | 0 | 16 Jun, 2025 | |
| Yann Echelard | 223,816 | 0 | 25 Nov, 2025 | |
| Daniel Hume | 192,748 | 0 | 16 Jun, 2025 | |
| Laurence N Charney | 179,690 | 0 | 29 Jan, 2026 | |
| Sagar Lonial | 94,061 | 0 | 12 Sep, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 28 Jan, 2026 | Laurence N Charney | Common Stock | D | 30,000 | $0.00 | 192,887 | D | G |
| 29 Jan, 2026 | Laurence N Charney | Common Stock | D | 13,197 | $0.00 | 179,690 | D | G |
| 08 Jan, 2026 | Michael S Weiss | Common Stock | A | 622,000 | $0.00 | 9,778,086 | D | A |
| 08 Jan, 2026 | Sean A Power | Common Stock | A | 90,000 | $0.00 | 798,111 | D | A |
| 24 Nov, 2025 | Yann Echelard | Common Stock | D | 5,000 | $32.57 | 223,816 | D | S |
| 05 Nov, 2025 | Michael S Weiss | Common Stock | D | 3,865,126 | $0.00 | 9,959,803 | D | G |
| 05 Nov, 2025 | Michael S Weiss | Common Stock | D | 803,717 | $0.00 | 9,156,086 | D | G |
| 11 Sep, 2025 | Sagar Lonial | Common Stock | D | 20,852 | $32.24 | 94,061 | D | S |
| 12 Jun, 2025 | Kenneth Hoberman | Common Stock | A | 14,718 | $0.00 | 279,653 | D | A |
| 12 Jun, 2025 | Daniel Hume | Common Stock | A | 14,718 | $0.00 | 192,748 | D | A |
| 12 Jun, 2025 | Yann Echelard | Common Stock | A | 14,718 | $0.00 | 238,816 | D | A |
| 12 Jun, 2025 | Laurence N Charney | Common Stock | A | 21,408 | $0.00 | 222,887 | D | A |
| 12 Jun, 2025 | Sagar Lonial | Common Stock | A | 14,718 | $0.00 | 114,913 | D | A |
| 13 Jun, 2025 | Yann Echelard | Common Stock | D | 10,000 | $36.94 | 228,816 | D | S |
| 17 Mar, 2025 | Daniel Hume | Common Stock | D | 62,459 | $0.00 | 178,030 | D | G |
| 10 Mar, 2025 | Laurence N Charney | Common Stock | D | 6,000 | $0.00 | 201,479 | D | G |
| 29 Jan, 2025 | Sean A Power | Common Stock | A | 87,500 | $0.00 | 708,111 | D | A |
| 29 Jan, 2025 | Michael S Weiss | Common Stock | A | 750,000 | $0.00 | 13,824,929 | D | A |
| 03 Jan, 2025 | Sean A Power | Common Stock | D | 11,337 | $30.29 | 670,632 | D | S |
| 06 Jan, 2025 | Sean A Power | Common Stock | D | 10,021 | $28.53 | 660,611 | D | S |