As of June 18, 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 (Ceo, 183.46K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Heidi Henson | - | 0 | 25,975 | 06 Dec, 2024 |
| Jonathan Robert Hunt | Chief Accounting Officer | 59,800 | 0 | 17 Nov, 2025 |
| Lori A Woods | Ceo | 0 | 183,460 | 01 Apr, 2025 |
| Robert F Iii Williamson | - | 108,982 | 0 | 01 Apr, 2025 |
| Johan M. Spoor | Ceo | 0 | 72,000 | 26 Nov, 2024 |
| Jennifer Streeter | Coo Vp Of Hr | 77,940 | 0 | 22 Sep, 2022 |
| Mark John Austin | Vp Finance/Prin Finacct Offic | 84,030 | 0 | 24 Apr, 2024 |
| Juan Graham | Chief Financial Officer | 35,354 | 0 | 01 Apr, 2025 |
| Markus Puhlmann | Chief Medical Officer | 1,375,425 | 0 | 26 Jan, 2024 |
| Alpha Therapy, Llc Lantheus | - | 116,773,394 | 0 | 08 Mar, 2024 |
* 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 | Robert F Iii Williamson | 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 | Lori A Woods | 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 | Johan M. Spoor | Stock option (right to buy) | A | 735,000 | $0.00 | 735,000 | 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 | 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 |
| 02 Mar, 2026 | Heidi Henson | Stock option (right to buy) | A | 50,000 | $0.00 | 50,000 | 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 |
| 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 |
| 12 Nov, 2025 | Robert F Iii Williamson | Common Stock | A | 9,498 | $2.10 | 9,864 | I | P |
| 04 Sep, 2025 | Joel Sendek | Stock option (right to buy) | A | 600,000 | $0.00 | 600,000 | D | A |
| 03 Sep, 2025 | Maria E Martinez | Stock option (right to buy) | A | 75,000 | $0.00 | 75,000 | D | A |
| 28 Mar, 2025 | Johan M. Spoor | Common Stock | A | 22,026 | $2.24 | 59,383 | D | P |
| 28 Mar, 2025 | Robert F Iii Williamson | Common Stock | A | 22,192 | $2.27 | 70,837 | D | P |
| 28 Mar, 2025 | Juan Graham | Common Stock | A | 33,333 | $2.25 | 35,354 | D | P |