WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Position in LNTH — Lantheus Holdings, Inc.

CIK 1644956 CHICAGO, IL

Back to LNTH Full portfolio

Position in LNTH

as of Mar 31, 2026 · filed May 8, 2026 Compact

Position Value

$30,305,943

-$4,444,936 QoQ

Shares Held

399,551

-23.5% QoQ

Ownership

0.614%

of shares outstanding

% of Portfolio

0.10%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2021

20 quarters on record

Voting authority Sole 69% Shared 0% None 31%

Common Shares in LNTH Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Mar 31, 2026

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $98,414,557 across 3 Drug Manufacturers - Specialty & Generic names. LNTH ranks #2 (30.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	TEVA	Teva Pharmaceutical Industries Ltd	1,425,667	$42,941,090
2	LNTH	Lantheus Holdings, Inc. This page	399,551	$30,305,943
3	ANIP	Ani Pharmaceuticals Inc	327,276	$25,167,524

All Filings in LNTH

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20 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$30,305,943	399,551	-23.5%	Shares	Sole	2026-05-08
2025-12-31	$34,750,879	522,177	-9.1%	Shares	Sole	2026-02-09
2025-09-30	$29,475,388	574,681	+46.7%	Shares	Sole	2025-11-12
2025-06-30	$32,058,176	391,622	+7.7%	Shares	Sole	2025-07-29
2025-03-31	$35,503,659	363,767	-4.4%	Shares	Sole	2025-05-09
2024-12-31	$34,023,785	380,324	+2.5%	Shares	Sole	2025-02-10
2024-09-30	$40,725,920	371,079	-26.6%	Shares	Sole	2024-11-08
2024-06-30	$40,593,098	505,581	-9.7%	Shares	Sole	2024-08-08
2024-03-31	$34,844,068	559,834	+0.6%	Shares	Sole	2024-05-08
2023-12-31	$34,516,020	556,710	+62.8%	Shares	Sole	2024-02-09
2023-09-30	$23,762,715	342,008	+4.3%	Shares	Sole	2023-11-09
2023-06-30	$27,506,038	327,765	-35.3%	Shares	Sole	2023-08-11
2023-03-31	$41,795,752	506,247	-13.9%	Shares	Sole	2023-05-12
2022-12-31	$29,951,383	587,743	-1.8%	Shares	Sole	2023-02-09
2022-09-30	$42,080,408	598,328	-23.2%	Shares	Sole	2022-11-09
2022-06-30	$51,448,132	779,163	-36.0%	Shares	Sole	2022-08-10
2022-03-31	$67,351,374	1,217,707	-45.0%	Shares	Sole	2022-05-11
2021-12-31	$63,934,407	2,213,029	-15.9%	Shares	Sole	2022-02-14
2021-09-30	$67,570,397	2,631,246	+46886.5%	Shares	Sole	2021-11-10
2021-06-30	$154,784	5,600	—	Shares	Sole	2021-08-12
No filing history on record for this holder in this stock.