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Lantheus

LNTH

Market cap $6.66B

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
26	26 Charles Schwab San Francisco, California	$49.9M	+$1.02M	+14,245	+2%
27	EIP 27 Epoch Investment Partners New York	$49.3M	+$17.4M	+242,222	+59%
28	PCM 28 Polaris Capital Management Boston, Massachusetts	$46.8M	+$5.67M	+79,000	+15%
29	29 Marshall Wace London, United Kingdom	$46.4M	+$27.2M	+379,070	+163%
30	30 Healthcare of Ontario Pension Plan (HOOPP) Trust Fund Toronto, Ontario, Canada	$45.4M	+$37.5M	+522,678	+686%
31	31 Jacobs Levy Equity Management Florham Park, New Jersey	$43.8M	+$28.4M	+395,340	+217%
32	32 Goldman Sachs New York	$42.1M	+$14.2M	+198,443	+56%
33	33 Balyasny Asset Management Chicago, Illinois	$40.9M	+$28.6M	+398,601	+283%
34	34 Bank of America Charlotte, North Carolina	$40.3M	-$20.7M	-288,157	-35%
35	35 UBS AM Chicago, Illinois	$36.9M	-$960K	-13,375	-3%
36	36 Boston Partners Boston, Massachusetts	$35.7M	+$33.8M	+470,658	New
37	37 Bank of New York Mellon New York	$35.2M	-$394K	-5,492	-1%
38	VFT 38 Vanguard Fiduciary Trust Malvern, Pennsylvania	$34.8M	+$32.9M	+458,977	New
39	PCM 39 Portolan Capital Management Boston, Massachusetts	$31.7M	-$4.19M	-58,399	-12%
40	SSCM 40 Summit Street Capital Management New York	$31.5M	+$704K	+9,810	+2%
41	41 William Blair Investment Management Chicago, Illinois	$30.3M	-$8.8M	-122,626	-23%
42	LP 42 Longaeva Partners Chicago, Illinois	$29.1M	+$27.6M	+383,945	New
43	BCM 43 Brigade Capital Management New York	$27.6M	+$17M	+236,138	+185%
44	44 Invesco Atlanta, Georgia	$27.5M	-$256K	-3,562	-1%
45	PCMF 45 Private Capital Management (Florida) Naples, Florida	$27.1M	-$14.4M	-201,180	-36%
46	46 Adage Capital Partners Boston, Massachusetts	$26.3M	+$24.9M	+346,755	New
47	47 VOYA Investment Management Atlanta, Georgia	$25.6M	+$21.3M	+296,291	+728%
48	48 Alyeska Investment Group Chicago, Illinois	$23.2M	+$21.9M	+305,549	New
49	49 BNP Paribas Financial Markets Paris, France	$22.7M	-$504K	-7,018	-2%
50	SAM 50 Silvercrest Asset Management New York	$22.2M	-$8.87M	-123,522	-30%