LNTH · Insider Trading
Lantheus Holdings, Inc
Every open-market purchase and sale reported by LNTH officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-02 | Robert J. Marshall Jr. | CFO and Treasurer | F | −721 | −$72.79K |
| 2026-08-19 | Kimberly Brown | Chief Accounting Officer | F | −463 | −$46.72K |
| 2026-08-19 | Ludger Dinkelborg | See Remarks | F | −2,536 | −$255.91K |
| 2026-06-03 | Mary Anne Heino | Executive Chair and CEO | F | −1,227 | −$118.61K |
| 2026-06-03 | Gerard Ber | Director | F | −381 | −$36.83K |
| 2026-05-18 | Julia Marie Eastland | Director | A | +4,137 | — |
| 2026-05-18 | James H Thrall | Director | A | +4,137 | — |
| 2026-05-18 | Gerard Ber | Director | A | +4,137 | — |
| 2026-05-18 | Minnie Baylor-Henry | Director | A | +4,137 | — |
| 2026-05-18 | Gary J Pruden | Director | A | +4,137 | — |
| 2026-05-18 | Sam R Leno | Director | A | +4,137 | — |
| 2026-05-18 | Heinz Christoph Maeusli | Director | A | +4,137 | — |
| 2026-05-18 | Phuong Khanh Morrow | Director | A | +4,137 | — |
| 2026-05-18 | Julie McHugh | Director | A | +4,137 | — |
| 2026-04-21 | Daniel Niedzwiecki | See Remarks | F | −1,911 | −$160.18K |
| 2026-03-09 | Amanda Michelle Morgan | Chief Commercial Officer | MIXED | +25,613 | −$45.40K |
| 2026-03-09 | Kimberly Brown | Chief Accounting Officer | MIXED | +6,025 | −$10.15K |
| 2026-03-09 | Robert J. Marshall Jr. | CFO and Treasurer | MIXED | +36,820 | −$90.20K |
| 2026-03-09 | Ludger Dinkelborg | See Remarks | A | +20,966 | — |
| 2026-03-09 | Daniel Niedzwiecki | See Remarks | MIXED | +35,409 | −$97.91K |
| 2026-03-04 | Mary Anne Heino | Executive Chair and CEO | MIXED | −9,811 | −$3.20M |
| 2026-03-04 | Robert J. Marshall Jr. | CFO and Treasurer | MIXED | −2,161 | −$812.75K |
| 2026-03-04 | Amanda Michelle Morgan | Chief Commercial Officer | MIXED | −554 | −$254.54K |
| 2026-03-04 | Daniel Niedzwiecki | See Remarks | MIXED | −3,090 | −$630.16K |
| 2025-12-17 | Amanda Michelle Morgan | Chief Commercial Officer | F | −724 | −$57.78K |
| 2025-11-19 | Mary Anne Heino | Executive Chair | A | +14,285 | — |
| 2025-09-03 | Robert J. Marshall Jr. | CFO and Treasurer | F | −727 | −$39.91K |
| 2025-08-21 | FARALLON PARTNERS L L C/CA | 10%+ Owner | Sell | −34,060,000 | −$1.91B |
| 2025-08-21 | Mark C Wehrly | — | Sell | −27,248,000 | −$1.53B |
| 2025-08-19 | Ludger Dinkelborg | See Remarks | A | +14,765 | — |
| 2025-08-19 | Kimberly Brown | Chief Accounting Officer | F | −463 | −$25.09K |
| 2025-08-15 | Paul Blanchfield | President | Sell | −3,060 | −$163.92K |
| 2025-07-17 | Paul Blanchfield | President | F | −518 | −$42.09K |
| 2025-06-17 | Daniel Niedzwiecki | See Remarks | Sell | −6,000 | −$472.44K |
| 2025-06-11 | Robert J. Marshall Jr. | CFO and Treasurer | MIXED | −25,000 | −$2.56M |
| 2025-06-11 | Julie McHugh | Director | Sell | −5,192 | −$423.77K |
| 2025-06-09 | Daniel Niedzwiecki | See Remarks | Sell | −6,000 | −$477.90K |
| 2025-06-09 | Paul Blanchfield | President | Sell | −6,599 | −$525.61K |
| 2025-06-04 | Mary Anne Heino | Director | Sell | −26,066 | −$2.00M |
| 2025-05-29 | Mary Anne Heino | Director | G | — | — |
| 2025-05-16 | Gerard Ber | Director | A | +2,537 | — |
| 2025-05-16 | Minnie Baylor-Henry | Director | A | +2,537 | — |
| 2025-05-16 | Mary Anne Heino | Director | A | +2,537 | — |
| 2025-05-16 | Julia Marie Eastland | Director | A | +2,537 | — |
| 2025-05-16 | Sam R Leno | Director | A | +2,537 | — |
| 2025-05-16 | Heinz Christoph Maeusli | Director | A | +2,537 | — |
| 2025-05-16 | Julie McHugh | Director | A | +2,537 | — |
| 2025-05-16 | Phuong Khanh Morrow | Director | A | +2,537 | — |
| 2025-05-16 | Gary J Pruden | Director | MIXED | +2,537 | — |
| 2025-05-16 | James H Thrall | Director | A | +2,537 | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Mark C Wehrly | — | 6,842,227 | $683.68M |
| FARALLON PARTNERS L L C/CA | 10%+ Owner | 3,477,227 | $347.44M |
| Mary Anne Heino | Executive Chair and CEO | 330,515 | $33.03M |
| Brian A Markison | CEO | 232,420 | $23.22M |
| Robert J. Marshall Jr. | CFO and Treasurer | 122,071 | $12.20M |
| Daniel Niedzwiecki | See Remarks | 117,465 | $11.74M |
| Paul Blanchfield | President | 108,214 | $10.81M |
| Sam R Leno | Director | 67,246 | $6.72M |
| Amanda Michelle Morgan | Chief Commercial Officer | 64,153 | $6.41M |
| James H Thrall | Director | 39,881 | $3.98M |
| Ludger Dinkelborg | See Remarks | 33,195 | $3.32M |
| Julie McHugh | Director | 30,099 | $3.01M |
| Heinz Christoph Maeusli | Director | 30,014 | $3.00M |
| Gerard Ber | Director | 27,118 | $2.71M |
| Gary J Pruden | Director | 15,123 | $1.51M |
| Minnie Baylor-Henry | Director | 14,034 | $1.40M |
| Kimberly Brown | Chief Accounting Officer | 13,263 | $1.33M |
| Julia Marie Eastland | Director | 8,019 | $801.26K |
| Phuong Khanh Morrow | Director | 7,237 | $723.12K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the LNTH quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.