Companies / Lantheus Holdings, Inc.
Lantheus Holdings, Inc.
Nasdaq: LNTHCIK 1521036NORTH BILLERICA, MA
Financials · FY2025
Ownership
65.3M shares outstanding · as of Aug 3, 2026
Ownership
| Insiders | 1.20% | 786,029 |
| Institutions | 109.76% | 71,640,808 |
| Public float | 0.00% | 0 |
Reported holdings exceed shares outstanding — public float shown as 0; some positions may overlap or lag.
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 8
View all →| Insider | % of shares | Shares |
|---|---|---|
Heino Mary AnneCEOExecutive Chair and CEO · Director | 0.50% | 323,124 |
Marshall Robert J. Jr.CFO and Treasurer | 0.19% | 122,792 |
Niedzwiecki DanielSee Remarks | 0.18% | 119,376 |
Leno Sam RDirector | 0.10% | 67,246 |
Morgan Amanda MichelleChief Commercial Officer | 0.10% | 64,153 |
Thrall James HDirector | 0.06% | 39,881 |
Dinkelborg LudgerSee Remarks | 0.05% | 35,731 |
Brown KimberlyChief Accounting Officer | 0.02% | 13,726 |
Institutional holders 406
View all →| Holder | Value | % of shares |
|---|---|---|
| $931.63M | 12.87% | |
| $445.84M | 10.26% | |
| $362.17M | 7.32% | |
| $361.20M | 8.32% | |
| $287.73M | 6.62% | |
| $277.43M | 3.83% | |
| $133.97M | 2.71% | |
| $118.70M | 2.40% | |
| $116.97M | 2.69% | |
| $94.20M | 2.17% |
Activity
InsidersInstitutions
What insiders are doing in this stock (Form 4).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Mar 2, 2026 | Heino Mary Anne CEO | Other | Common Stock | $3.20M | -42K -11.48% | 323,124 0.50% of shares | low |
| Mar 2, 2026 | Marshall Robert J. Jr. Executive | Other | Common Stock | $812.7K | -11K -11.02% | 85,972 0.13% of shares | low |
| Mar 2, 2026 | Niedzwiecki Daniel Executive | Other | Common Stock | $630.2K | -8K -8.96% | 83,967 0.13% of shares | low |
| Mar 2, 2026 | Morgan Amanda Michelle Executive | Other | Common Stock | $254.5K | -3K -7.97% | 38,540 0.06% of shares | low |
| Mar 5, 2026 | Niedzwiecki Daniel Executive | Other | Common Stock | $97.9K | -1K -1.06% | 119,376 0.18% of shares | low |
| Mar 5, 2026 | Marshall Robert J. Jr. Executive | Other | Common Stock | $90.2K | -1K -0.95% | 122,792 0.19% of shares | low |
| Mar 5, 2026 | Morgan Amanda Michelle Executive | Other | Common Stock | $45.4K | -595 -0.92% | 64,153 0.10% of shares | low |
| Mar 5, 2026 | Brown Kimberly Executive | Other | Common Stock | $10.1K | -133 -0.96% | 13,726 0.02% of shares | low |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Vanguard Group Inc | Passive13G/A | — |
| Farallon Capital Partners, L.P. | Passive13G/A | — |
| Janus Henderson Group PLC | Passive13G/A | — |
| Morgan Stanley | Passive13G/A | — |
| Janus Henderson Group PLC | Passive13G/A | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| LNTH | — | 516544103 |