Lantheus
LNTH
475 hedge funds and large institutions have $6.63B invested in Lantheus in 2025 Q2 according to their latest regulatory filings, with 45 funds opening new positions, 196 increasing their positions, 175 reducing their positions, and 90 closing their positions.
44% more call options, than puts
Call options by funds: $54.4M | Put options by funds: $37.8M
12% more repeat investments, than reductions
Existing positions increased: 196 | Existing positions reduced: 175
1.81% more ownership
Funds ownership: 115.33% → 117.14% (+1.8%)
10% less funds holding
Funds holding: 525 → 475 (-50)
14% less capital invested
Capital invested by funds: $7.7B → $6.63B (-$1.07B)
50% less first-time investments, than exits
New positions opened: 45 | Existing positions closed: 90
60% less funds holding in top 10
Funds holding in top 10: 10 → 4 (-6)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$209M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
+$71.2M |
| 3 |
FCM
Farallon Capital Management
San Francisco,
California
|
+$61.4M |
| 4 |
Janus Henderson Group
London,
United Kingdom
|
+$37.3M |
| 5 |
UBS Group
Zurich,
Switzerland
|
+$36.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PCM
Portolan Capital Management
Boston,
Massachusetts
|
-$53.8M |
| 2 |
Assenagon Asset Management
Senningerberg,
Luxembourg
|
-$32.8M |
| 3 |
N
Nuveen
Charlotte,
North Carolina
|
-$31.2M |
| 4 |
HRCM
Hood River Capital Management
Palm Beach Gardens,
Florida
|
-$29.2M |
| 5 |
Invesco
Atlanta,
Georgia
|
-$25.2M |
LNTH Hedge Fund Activity: Q2 2025 in Review
475 of the 7,595 institutional investors tracked by Wall St. Rank reported a position in Lantheus (LNTH) for Q2 2025, worth a combined $6.63B — down 14% from $7.7B a quarter earlier.
Sellers outnumbered buyers: 90 funds closed out of LNTH and 45 opened new positions — a net loss of 45 holders — while 175 trimmed existing stakes and 196 added.
The largest buyer was Fidelity Investments, adding an estimated $209M. The largest seller was Portolan Capital Management, cutting an estimated $53.8M.
- 475 institutional investors held Lantheus (LNTH) as of Q2 2025, down from 525 in Q1 2025.
- Funds reported $6.63B of Lantheus stock for Q2 2025, down 14% quarter-over-quarter.
- 45 funds opened new Lantheus positions in Q2 2025 and 90 closed out, a net change of -45 holders.
- The largest Lantheus buyer in Q2 2025 was Fidelity Investments, an estimated $209M added.
- The largest Lantheus seller in Q2 2025 was Portolan Capital Management, an estimated $53.8M sold.
Based on aggregated 13F filings for Q2 2025.