SEC Form 4 · Updated Daily
LNTH
— LANTHEUS HOLDINGS, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| FARALLON PARTNERS L L C/CA | 10%+ Owner | 3,477,227 | 2025-08-20 | S |
| WEHRLY MARK C | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| FRIED RICHARD B | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| PATEL RAJIV A | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Spokes Andrew J M | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Giauque Nicolas | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Roberts Thomas G. Jr. | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Linn Michael G | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Warren John R. | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Kim David T | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Seybold William | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Dreyfuss Philip D | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Gehani Varun N | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Saito Edric C. | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Dapice Joshua J. | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Short Daniel S. | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Dunn Hannah E. | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Luo Patrick (Cheng) | Reporting Owner | 3,477,227 | 2025-08-20 | S |
| Heino Mary Anne | Director | 321,897 | 2026-05-14 | F |
| Marshall Robert J. Jr. | Officer | 122,071 | 2026-08-31 | F |
| Niedzwiecki Daniel | Officer | 117,465 | 2026-04-17 | F |
| Blanchfield Paul | Officer | 108,214 | 2025-08-13 | S |
| LENO SAM R | Director | 67,246 | 2026-05-14 | A |
| Morgan Amanda Michelle | Officer | 64,153 | 2026-03-05 | F |
| Thrall James H | Director | 39,881 | 2026-05-14 | A |
| Dinkelborg Ludger | Officer | 33,195 | 2026-08-17 | F |
| McHugh Julie | Director | 30,099 | 2026-05-14 | A |
| Maeusli Heinz Christoph | Director | 30,014 | 2026-05-14 | A |
| Ber Gerard | Director | 27,499 | 2026-05-14 | A |
| Baylor-Henry Minnie | Director | 14,018 | 2026-05-14 | A |
| Brown Kimberly | Officer | 13,263 | 2026-08-17 | F |
| EASTLAND JULIA MARIE | Director | 8,019 | 2026-05-14 | A |
| Morrow Phuong Khanh | Director | 7,237 | 2026-05-14 | A |
| Pruden Gary J | Director | 6,674 | 2026-05-14 | A |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-08-31 | Marshall Robert J. Jr. | Tax withholding | 721 | $100.96 | 122,071 |
| 2026-08-17 | Brown Kimberly | Tax withholding | 463 | $100.91 | 13,263 |
| 2026-08-17 | Dinkelborg Ludger | Tax withholding | 2,536 | $100.91 | 33,195 |
| 2026-05-14 | EASTLAND JULIA MARIE | Grant / award | 4,137 | $0.00 | 8,019 |
| 2026-05-14 | Thrall James H | Grant / award | 4,137 | $0.00 | 39,881 |
| 2026-05-14 | Ber Gerard | Grant / award | 4,137 | $0.00 | 27,499 |
| 2026-05-14 | Baylor-Henry Minnie | Grant / award | 4,137 | $0.00 | 14,018 |
| 2026-05-14 | Pruden Gary J | Grant / award | 4,137 | $0.00 | 6,674 |
| 2026-05-14 | LENO SAM R | Grant / award | 4,137 | $0.00 | 67,246 |
| 2026-05-14 | Maeusli Heinz Christoph | Grant / award | 4,137 | $0.00 | 30,014 |
| 2026-05-14 | Morrow Phuong Khanh | Grant / award | 4,137 | $0.00 | 7,237 |
| 2026-05-14 | McHugh Julie | Grant / award | 4,137 | $0.00 | 30,099 |
| 2026-05-14 | Heino Mary Anne | Tax withholding | 1,227 | $96.67 | 321,897 |
| 2026-05-14 | Ber Gerard | Tax withholding | 381 | $96.67 | 27,118 |
| 2026-04-17 | Niedzwiecki Daniel | Tax withholding | 1,911 | $83.82 | 117,465 |
| 2026-03-05 | Morgan Amanda Michelle | Tax withholding | 595 | $76.31 | 64,153 |
| 2026-03-05 | Morgan Amanda Michelle | Grant / award | 26,208 | $0.00 | 64,748 |
| 2026-03-05 | Brown Kimberly | Tax withholding | 133 | $76.31 | 13,726 |
| 2026-03-05 | Brown Kimberly | Grant / award | 6,158 | $0.00 | 13,859 |
| 2026-03-05 | Marshall Robert J. Jr. | Tax withholding | 1,182 | $76.31 | 122,792 |
| 2026-03-05 | Marshall Robert J. Jr. | Grant / award | 38,002 | $0.00 | 123,974 |
| 2026-03-05 | Dinkelborg Ludger | Grant / award | 20,966 | $0.00 | 35,731 |
| 2026-03-05 | Niedzwiecki Daniel | Tax withholding | 1,283 | $76.31 | 119,376 |
| 2026-03-05 | Niedzwiecki Daniel | Grant / award | 36,692 | $0.00 | 120,659 |
| 2026-03-02 | Heino Mary Anne | Tax withholding | 41,916 | $76.30 | 323,124 |
| 2026-03-02 | Heino Mary Anne | Grant / award | 32,105 | $0.00 | 365,040 |
| 2026-03-02 | Marshall Robert J. Jr. | Tax withholding | 10,652 | $76.30 | 85,972 |
| 2026-03-02 | Marshall Robert J. Jr. | Grant / award | 8,491 | $0.00 | 96,624 |
| 2026-03-02 | Morgan Amanda Michelle | Tax withholding | 3,336 | $76.30 | 38,540 |
| 2026-03-02 | Morgan Amanda Michelle | Grant / award | 2,782 | $0.00 | 41,876 |
| 2026-03-02 | Niedzwiecki Daniel | Tax withholding | 8,259 | $76.30 | 83,967 |
| 2026-03-02 | Niedzwiecki Daniel | Grant / award | 5,169 | $0.00 | 92,226 |
| 2025-12-15 | Morgan Amanda Michelle | Tax withholding | 368 | $66.57 | 39,094 |
| 2025-11-17 | Heino Mary Anne | Grant / award (derivative) | 26,325 | $0.00 | 26,325 |
| 2025-11-17 | Heino Mary Anne | Grant / award | 14,285 | $0.00 | 332,935 |
| 2025-08-29 | Marshall Robert J. Jr. | Tax withholding | 727 | $54.90 | 88,133 |
| 2025-08-20 | Luo Patrick (Cheng) | Open-market sale | 3,365,000 | $56.15 | 3,477,227 |
| 2025-08-20 | Linn Michael G | Open-market sale | 3,365,000 | $56.15 | 3,477,227 |
| 2025-08-20 | Kim David T | Open-market sale | 3,365,000 | $56.15 | 3,477,227 |
| 2025-08-20 | Giauque Nicolas | Open-market sale | 3,365,000 | $56.15 | 3,477,227 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.