Lantheus Holdings's top three insider shareholders as of May 14, 2026 are Rajiv A Patel (Other, 3.48Mn shares), Partners L L C/Ca Farallon (TenPercentOwner, 3.48Mn shares), Rajiv A Patel (Other, 3.48Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Rajiv A Patel | - | 0 | 3,477,227 | 21 Aug, 2025 |
| Rajiv A Patel | - | 0 | 3,477,227 | 21 Aug, 2025 |
| Partners L L C/Ca Farallon | - | 0 | 3,477,227 | 21 Aug, 2025 |
| Mary Anne Heino | Ceo | 0 | 419,397 | 29 Mar, 2023 |
| Mary Anne Heino | Executive Chair And Ceo | 323,124 | 0 | 04 Mar, 2026 |
| Mary Anne Heino | - | 0 | 219,734 | 29 May, 2025 |
| Robert J. Jr. Marshall | Cfo And Treasurer | 122,792 | 0 | 09 Mar, 2026 |
| Robert J. Jr. Marshall | Cfo And Treasurer | 122,792 | 0 | 09 Mar, 2026 |
| Daniel Niedzwiecki | - | 117,465 | 0 | 21 Apr, 2026 |
| Paul Blanchfield | President | 108,214 | 0 | 15 Aug, 2025 |
| Etienne Montagut | Chief Business Officer | 94,651 | 0 | 07 Mar, 2024 |
| Etienne Montagut | Chief Business Officer | 94,651 | 0 | 07 Mar, 2024 |
| Carol Walker | Senior Vice President, Quality | 64,899 | 0 | 01 Apr, 2022 |
| Carol Walker | Senior Vice President, Quality | 64,899 | 0 | 01 Apr, 2022 |
| Amanda Michelle Morgan | Chief Commercial Officer | 64,153 | 0 | 09 Mar, 2026 |
| Amanda Michelle Morgan | Chief Commercial Officer | 64,153 | 0 | 09 Mar, 2026 |
| Sam R Leno | - | 63,109 | 0 | 16 May, 2025 |
| Andrea Sabens | Chief Accounting Officer | 60,420 | 0 | 17 Jul, 2024 |
| Andrea Sabens | Chief Accounting Officer | 60,420 | 0 | 17 Jul, 2024 |
| Jean-Claude Provost | Chief Medical Officer | 0 | 38,841 | 07 Mar, 2024 |
| Jean-Claude Provost | Chief Medical Officer | 0 | 38,841 | 07 Mar, 2024 |
| James H Thrall | - | 35,744 | 0 | 16 May, 2025 |
| James H Thrall | - | 35,744 | 0 | 16 May, 2025 |
| Ludger Dinkelborg | - | 35,731 | 0 | 09 Mar, 2026 |
| Ying Vivian Yao | Chief Human Resources Officer | 30,319 | 0 | 07 Mar, 2022 |
| Ying Vivian Yao | Chief Human Resources Officer | 30,319 | 0 | 07 Mar, 2022 |
| Julie Mchugh | - | 25,962 | 0 | 11 Jun, 2025 |
| Julie Mchugh | - | 25,962 | 0 | 11 Jun, 2025 |
| Heinz Christoph Maeusli | - | 25,877 | 0 | 16 May, 2025 |
| Heinz Christoph Maeusli | - | 25,877 | 0 | 16 May, 2025 |
| Gerard Ber | - | 23,362 | 0 | 16 May, 2025 |
| Gary J Pruden | - | 2,537 | 14,613 | 16 May, 2025 |
| Gary J Pruden | - | 2,537 | 14,613 | 16 May, 2025 |
| Kimberly Brown | Chief Accounting Officer | 13,726 | 0 | 09 Mar, 2026 |
| Minnie Baylor-Henry | - | 9,881 | 0 | 16 May, 2025 |
| Jeffrey Humphrey | Chief Medical Officer | 9,076 | 0 | 20 Jun, 2024 |
| Julia Marie Eastland | - | 3,882 | 0 | 16 May, 2025 |
| Phuong Khanh Morrow | - | 3,100 | 0 | 16 May, 2025 |
| Phuong Khanh Morrow | - | 3,100 | 0 | 16 May, 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 |
|---|---|---|---|---|---|---|---|---|
| 17 Apr, 2026 | Daniel Niedzwiecki | Common Stock | D | 1,911 | $83.82 | 117,465 | D | F |
| 05 Mar, 2026 | Ludger Dinkelborg | Common Stock | A | 20,966 | $0.00 | 35,731 | D | A |
| 05 Mar, 2026 | Kimberly Brown | Common Stock | A | 6,158 | $0.00 | 13,859 | D | A |
| 05 Mar, 2026 | Robert J. Jr. Marshall | Common Stock | A | 38,002 | $0.00 | 123,974 | D | A |
| 05 Mar, 2026 | Amanda Michelle Morgan | Common Stock | A | 26,208 | $0.00 | 64,748 | D | A |
| 05 Mar, 2026 | Daniel Niedzwiecki | Common Stock | A | 36,692 | $0.00 | 120,659 | D | A |
| 05 Mar, 2026 | Robert J. Jr. Marshall | Common Stock | A | 38,002 | $0.00 | 123,974 | D | A |
| 05 Mar, 2026 | Amanda Michelle Morgan | Common Stock | A | 26,208 | $0.00 | 64,748 | D | A |
| 05 Mar, 2026 | Daniel Niedzwiecki | Common Stock | D | 1,283 | $76.31 | 119,376 | D | F |
| 05 Mar, 2026 | Robert J. Jr. Marshall | Common Stock | D | 1,182 | $76.31 | 122,792 | D | F |
| 05 Mar, 2026 | Kimberly Brown | Common Stock | D | 133 | $76.31 | 13,726 | D | F |
| 05 Mar, 2026 | Robert J. Jr. Marshall | Common Stock | D | 1,182 | $76.31 | 122,792 | D | F |
| 05 Mar, 2026 | Amanda Michelle Morgan | Common Stock | D | 595 | $76.31 | 64,153 | D | F |
| 05 Mar, 2026 | Amanda Michelle Morgan | Common Stock | D | 595 | $76.31 | 64,153 | D | F |
| 02 Mar, 2026 | Robert J. Jr. Marshall | Common Stock | A | 8,491 | $0.00 | 96,624 | D | A |
| 02 Mar, 2026 | Amanda Michelle Morgan | Common Stock | A | 2,782 | $0.00 | 41,876 | D | A |
| 02 Mar, 2026 | Daniel Niedzwiecki | Common Stock | A | 5,169 | $0.00 | 92,226 | D | A |
| 02 Mar, 2026 | Amanda Michelle Morgan | Common Stock | A | 2,782 | $0.00 | 41,876 | D | A |
| 02 Mar, 2026 | Mary Anne Heino | Common Stock | A | 32,105 | $0.00 | 365,040 | D | A |
| 02 Mar, 2026 | Robert J. Jr. Marshall | Common Stock | A | 8,491 | $0.00 | 96,624 | D | A |