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Lantheus

LNTH

Market cap $6.86B

404 hedge funds and large institutions have $5.51B invested in Lantheus in 2026 Q1 according to their latest regulatory filings, with 69 funds opening new positions, 143 increasing their positions, 132 reducing their positions, and 47 closing their positions.

New

Increased

Maintained

Reduced

Closed

47% more first-time investments, than exits

New positions opened: 69 | Existing positions closed: 47

45% more call options, than puts

Call options by funds: $31.1M | Put options by funds: $21.4M

19% more capital invested

Capital invested by funds: $4.62B → $5.51B (+$893M)

7.03% more ownership

Funds ownership: 104.59% → 111.62% (+7%)

3% more funds holding

Funds holding: 391 → 404 (+13)

8% more repeat investments, than reductions

Existing positions increased: 143 | Existing positions reduced: 132

38% less funds holding in top 10

Funds holding in top 10: 8 → 5 (-3)

Holders

404

Holders Change

+13

Holders Change %

+3.32%

% of All Funds

4.98%

Holding in Top 10

Holding in Top 10 Change

-3

Holding in Top 10 Change %

-37.5%

% of All Funds

0.06%

New

Increased

143

Reduced

132

Closed

Calls

$31.1M

Puts

$21.4M

Net Calls

+$9.71M

Net Calls Change

+$779K

Top Buyers

1	American Century Companies Kansas City, Missouri	+$72.7M
2	Brown Advisory Baltimore, Maryland	+$49.4M
3	Wellington Management Group Boston, Massachusetts	+$46.8M
4	Healthcare of Ontario Pension Plan (HOOPP) Trust Fund Toronto, Ontario, Canada	+$37.5M
5	UBS Group Zurich, Switzerland	+$33.8M

Top Sellers

1	Janus Henderson Group London, United Kingdom	-$66.9M
2	FGP Freestone Grove Partners San Francisco, California	-$40.5M
3	Citadel Advisors Miami, Florida	-$25.8M
4	VPC Vestal Point Capital New York	-$24M
5	Bank of America Charlotte, North Carolina	-$20.7M

#	Name	Holding	Trade Value	Shares Change	Change in Stake
1	1 BlackRock New York	$621M	-$5.97M	-83,221	-1%
2	FCM 2 Farallon Capital Management San Francisco, California	$424M	+$11.2M	+156,000	+3%
3	3 Janus Henderson Group London, United Kingdom	$362M	-$66.9M	-932,406	-16%
4	4 Fidelity Investments Boston, Massachusetts	$351M	+$21.7M	+302,927	+7%
5	VPM 5 Vanguard Portfolio Management Malvern, Pennsylvania	$241M	+$228M	+3,174,274	New
6	VCM 6 Vanguard Capital Management Malvern, Pennsylvania	$221M	+$209M	+2,914,314	New
7	7 State Street Boston, Massachusetts	$184M	+$183K	+2,549	+0.1%
8	8 American Century Companies Kansas City, Missouri	$135M	+$72.7M	+1,012,076	+132%
9	9 Geode Capital Management Boston, Massachusetts	$134M	+$2.83M	+39,431	+2%
10	10 Morgan Stanley New York	$125M	-$7.98M	-111,106	-6%
11	RP 11 Reinhart Partners Mequon, Wisconsin	$119M	+$165K	+2,302	+0.1%
12	12 Dimensional Fund Advisors Austin, Texas	$105M	-$2.58M	-35,893	-3%
13	CG 13 Carmignac Gestion Paris, France	$101M	+$14.8M	+206,000	+18%
14	14 Swedbank Stockholm, Sweden	$93.2M	–	–	–
15	15 TD Asset Management Toronto, Ontario, Canada	$86M	+$30.3M	+421,624	+59%
16	16 Point72 Asset Management Stamford, Connecticut	$73.9M	-$2.88M	-40,159	-4%
17	17 T. Rowe Price Associates Baltimore, Maryland	$69.8M	+$7.36M	+102,485	+13%
18	18 UBS Group Zurich, Switzerland	$65.8M	+$33.8M	+471,220	+119%
19	NAMI 19 Nomura Asset Management International Philadelphia, Pennsylvania	$63.7M	-$7.15M	-99,580	-11%
20	DM 20 Deerfield Management New York	$62.8M	–	–	–
21	21 Northern Trust Chicago, Illinois	$61.1M	+$488K	+6,796	+0.9%
22	22 Wellington Management Group Boston, Massachusetts	$58.3M	+$46.8M	+652,476	+561%
23	23 Mackenzie Financial Toronto Ontario, Ontario, Canada	$54.2M	+$4.08M	+56,887	+9%
24	24 JP Morgan Chase New York	$54M	+$71.4K	+994	+0.1%
25	25 Brown Advisory Baltimore, Maryland	$52.2M	+$49.4M	+687,607	New