Lantheus
Commercializes PET radiodiagnostics and ultrasound-enhancing agents for prostate cancer, amyloid, and cardiac imaging.
$100.51
After-hours close−0.24 (−0.24%)
At close$100.75(+0.28%)
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Breakdown13F · Form 4
Institutions 129.44%Insiders 2.00%
A 13F quarter can total more than the shares outstanding — sub-advisers file the same block twice, and a filer's own share count can be a quarter stale. No split is drawn from it.
Shares outstanding 65.11M · Float 58.36M · 89.7% free float
Institutions13F, as of Jun 30, 2026
477 holders · 84.27M shares · 98 new positions · 250 increased · 144 reduced · 39 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 8.40M | 12.90% | +214.4K | Aug 7, 2026 |
| Farallon Capital Management LLC | 5.58M | 8.58% | 0 | Aug 14, 2026 |
| Jupiter Topco LLC | 5.19M | 7.97% | +5.19Mnew | Aug 14, 2026 |
| FMR LLC | 3.88M | 5.96% | −746.5K | Aug 13, 2026 |
| Vanguard Portfolio Management LLC | 3.24M | 4.97% | +64.2K | Aug 13, 2026 |
| Vanguard Capital Management LLC | 2.93M | 4.50% | +17.9K | Aug 13, 2026 |
| American Century Companies Inc | 2.82M | 4.33% | +1.04M | Aug 12, 2026 |
| State Street Corp | 2.50M | 3.84% | +70.9K | Aug 7, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Janus Henderson Group PLC | 7.40% | 4.77M | 13G | May 15, 2026 ↗ |
| Michael G. Linnincl. Rajiv A. Patel, Thomas G. Roberts, Jr. +26 more | 7.30% | 5.06M | 13G | Nov 14, 2024 ↗ |
| FMR LLC | 6.50% | 4.40M | 13G | Nov 5, 2025 ↗ |
| Vanguard Capital Management | 5.25% | 3.42M | 13G | Apr 30, 2026 ↗ |
| Vanguard Portfolio Management | 5.06% | 3.30M | 13G | Jul 31, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Farallon Partners L L C/CA | 10 percent owner, other: Member of a Group Owning 10% | 3.48M | 5.34% | Aug 21, 2025 |
| Mary Anne Heino | director, officer: Executive Chair and CEO | 363.6K | 0.56% | Mar 4, 2026 |
| Brian A. Markison | director, officer: CEO | 232.4K | 0.36% | Mar 7, 2025 |
| Robert J. Jr. Marshall | officer: CFO and Treasurer | 122.8K | 0.19% | Mar 9, 2026 |
| Daniel Niedzwiecki | officer: See Remarks | 117.5K | 0.18% | Apr 21, 2026 |
| Paul Blanchfield | officer: President | 108.2K | 0.17% | Aug 15, 2025 |
| Sam R. Leno | director | 67.2K | 0.10% | May 18, 2026 |
| Amanda Michelle Morgan | officer: Chief Commercial Officer | 64.2K | 0.10% | Mar 9, 2026 |
| James H. Thrall | director | 39.9K | 0.06% | May 18, 2026 |
| Ludger Dinkelborg | officer: See Remarks | 33.2K | 0.05% | Aug 19, 2026 |
2 ten-percent owners hold 3.60M shares by Form 4, outside the officers-and-directors figure above · 21 people have not refiled in the last 18 months (3.25M shares), so they are not in the figure above
Latest trades
No open-market trades in the last 12 months.
CongressHouse and Senate disclosures
Not reported.