Lantheus
LNTH
468 hedge funds and large institutions have $8.34B invested in Lantheus in 2026 Q2 according to their latest regulatory filings, with 95 funds opening new positions, 152 increasing their positions, 144 reducing their positions, and 31 closing their positions.
206% more first-time investments, than exits
New positions opened: 95 | Existing positions closed: 31
71% more call options, than puts
Call options by funds: $44M | Put options by funds: $25.7M
51% more capital invested
Capital invested by funds: $5.51B → $8.34B (+$2.83B)
40% more funds holding in top 10
Funds holding in top 10: 5 → 7 (+2)
15% more funds holding
Funds holding: 408 → 468 (+60)
3.94% more ownership
Funds ownership: 111.65% → 115.58% (+3.9%)
6% more repeat investments, than reductions
Existing positions increased: 152 | Existing positions reduced: 144
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
+$102M |
| 2 |
American Century Companies
Kansas City,
Missouri
|
+$96.5M |
| 3 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$91.7M |
| 4 |
Assenagon Asset Management
Senningerberg,
Luxembourg
|
+$54.3M |
| 5 |
Holocene Advisors
New York
|
+$51M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$69.6M |
| 2 |
Mackenzie Financial
Toronto Ontario,
Ontario, Canada
|
-$54.2M |
| 3 |
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Toronto,
Ontario, Canada
|
-$45.4M |
| 4 |
TD Asset Management
Toronto,
Ontario, Canada
|
-$44.7M |
| 5 |
LP
Longaeva Partners
Chicago,
Illinois
|
-$33.1M |
LNTH Hedge Fund Activity: Q2 2026 in Review
468 of the 8,349 institutional investors tracked by Wall St. Rank reported a position in Lantheus (LNTH) for Q2 2026, worth a combined $8.34B — up 51% from $5.51B a quarter earlier.
Buyers outnumbered sellers: 95 funds opened new LNTH positions and 31 closed out — a net gain of 64 holders — while 152 added to existing stakes and 144 trimmed.
The largest buyer was Citadel Advisors, adding an estimated $102M. The largest seller was Fidelity Investments, cutting an estimated $69.6M.
- 468 institutional investors held Lantheus (LNTH) as of Q2 2026, up from 408 in Q1 2026.
- Funds reported $8.34B of Lantheus stock for Q2 2026, up 51% quarter-over-quarter.
- 95 funds opened new Lantheus positions in Q2 2026 and 31 closed out, a net change of +64 holders.
- The largest Lantheus buyer in Q2 2026 was Citadel Advisors, an estimated $102M added.
- The largest Lantheus seller in Q2 2026 was Fidelity Investments, an estimated $69.6M sold.
Based on aggregated 13F filings for Q2 2026.