As of March 23, 2026, Perspective Therapeutics's top three insider holders are Alpha Therapy, Llc Lantheus (TenPercentOwner, 116.77Mn shares), Markus Puhlmann (Chief Medical Officer, 1.38Mn shares), Lori A Woods (Director, 183.46K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Alpha Therapy, Llc Lantheus | 116,773,394 | 0 | 08 Mar, 2024 | |
| Markus Puhlmann | Chief Medical Officer | 1,375,425 | 0 | 26 Jan, 2024 |
| Lori A Woods | 0 | 183,460 | 01 Apr, 2025 | |
| Robert F Iii Williamson | 108,982 | 0 | 01 Apr, 2025 | |
| Mark John Austin | Vp Finance/Prin Finacct Offic | 84,030 | 0 | 24 Apr, 2024 |
| Jennifer Streeter | Coo Vp Of Hr | 77,940 | 0 | 22 Sep, 2022 |
| Johan M. Spoor | Chief Executive Officer | 59,383 | 4,650 | 01 Apr, 2025 |
| Jonathan Robert Hunt | Chief Accounting Officer | 59,800 | 0 | 17 Nov, 2025 |
| Juan Graham | Chief Financial Officer | 35,354 | 0 | 01 Apr, 2025 |
| Heidi Henson | 0 | 25,975 | 06 Dec, 2024 | |
| Robert F Iii Williamson | 0 | 9,864 | 14 Nov, 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 |
|---|---|---|---|---|---|---|---|---|
| 02 Mar, 2026 | Heidi Henson | Stock option (right to buy) | A | 50,000 | $0.00 | 50,000 | D | A |
| 02 Mar, 2026 | Maria E Martinez | Stock option (right to buy) | A | 50,000 | $0.00 | 50,000 | D | A |
| 02 Mar, 2026 | Johan M. Spoor | Stock option (right to buy) | A | 735,000 | $0.00 | 735,000 | D | A |
| 02 Mar, 2026 | Robert F Iii Williamson | Stock option (right to buy) | A | 50,000 | $0.00 | 50,000 | D | A |
| 02 Mar, 2026 | Markus Puhlmann | Stock option (right to buy) | A | 150,000 | $0.00 | 150,000 | D | A |
| 02 Mar, 2026 | Lori A Woods | Stock option (right to buy) | A | 50,000 | $0.00 | 50,000 | D | A |
| 02 Mar, 2026 | Frank Morich | Stock option (right to buy) | A | 50,000 | $0.00 | 50,000 | D | A |
| 02 Mar, 2026 | Jonathan Robert Hunt | Stock option (right to buy) | A | 90,000 | $0.00 | 90,000 | D | A |
| 13 Nov, 2025 | Jonathan Robert Hunt | Common Stock | A | 11,000 | $2.03 | 59,800 | D | P |
| 12 Nov, 2025 | Robert F Iii Williamson | Common Stock | A | 9,498 | $2.10 | 9,864 | I | P |
| 03 Sep, 2025 | Maria E Martinez | Stock option (right to buy) | A | 75,000 | $0.00 | 75,000 | D | A |
| 04 Sep, 2025 | Joel Sendek | Stock option (right to buy) | A | 600,000 | $0.00 | 600,000 | D | A |
| 28 Mar, 2025 | Juan Graham | Common Stock | A | 33,333 | $2.25 | 35,354 | D | P |
| 31 Mar, 2025 | Lori A Woods | Common Stock | A | 23,475 | $2.13 | 183,460 | I | P |
| 28 Mar, 2025 | Robert F Iii Williamson | Common Stock | A | 22,192 | $2.27 | 70,837 | D | P |
| 28 Mar, 2025 | Johan M. Spoor | Common Stock | A | 22,026 | $2.24 | 59,383 | D | P |
| 28 Mar, 2025 | Johan M. Spoor | Common Stock | A | 4,650 | $2.21 | 4,650 | I | P |
| 31 Mar, 2025 | Robert F Iii Williamson | Common Stock | A | 38,145 | $2.14 | 108,982 | D | P |
| 03 Mar, 2025 | Markus Puhlmann | Stock option (right to buy) | A | 165,000 | $0.00 | 165,000 | D | A |
| 03 Mar, 2025 | Lori A Woods | Stock option (right to buy) | A | 50,000 | $0.00 | 50,000 | D | A |