Lantheus Holdings, Inc.
US ˙ NasdaqGM ˙ US5165441032

SecurityLNTH / Lantheus Holdings, Inc.
InstitutionLazard Asset Management Llc
Latest Disclosed Ownership2,473 shares
Latest Disclosed Value $ 187,577
Lazard Asset Management Llc reports 83.52% decrease in ownership of LNTH / Lantheus Holdings, Inc.

On May 15, 2026 - Lazard Asset Management Llc filed a 13F-HR form disclosing ownership of 2,473 shares of Lantheus Holdings, Inc. (US:LNTH) valued at $187,577 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,003 shares of Lantheus Holdings, Inc.. This represents a change in shares of -83.52% during the quarter. The current value of the position is $249,724 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F LANTHEUS HLDGS COM 516544103 2,473 -12,530 -83.52 188 -81.26 0.0002
2026-02-17 2025-12-31 13F LANTHEUS HLDGS COM 516544103 15,003 -221,580 -93.66 998 -91.78 0.0017
2025-11-14 2025-09-30 13F LANTHEUS HLDGS COM 516544103 236,583 -162,321 -40.69 12,134 37,818.75 0.0163
2025-08-14 2025-06-30 13F LANTHEUS HOLDIN Common Stock 516544103 398,904 34,339 9.42 33 -8.57 0.0449
2025-05-15 2025-03-31 13F LANTHEUS HOLDIN Common Stock 516544103 364,565 120,748 49.52 36 66.67 0.0546
2025-02-14 2024-12-31 13F LANTHEUS HOLDIN Common Stock 516544103 243,817 -839,023 -77.48 22 -82.20 0.0319
2024-11-14 2024-09-30 13F LANTHEUS HOLDIN Common Stock 516544103 1,082,840 688,688 174.73 119 280.65 0.1589
2024-08-14 2024-06-30 13F LANTHEUS HOLDIN Common Stock 516544103 394,152 -158,905 -28.73 32 -8.82 0.0397
2024-07-09 2024-03-31 13F/A-1 LANTHEUS HOLDIN Common Stock 516544103 553,057 9,616 1.77 34 3.03 0.0418
2024-05-14 2024-03-31 13F LANTHEUS HOLDIN Common Stock 516544103 553,057 9,616 34 0.0418
2024-02-14 2023-12-31 13F LANTHEUS HOLDIN Common Stock 516544103 543,441 206,495 61.28 34 43.48 0.0426
2023-11-14 2023-09-30 13F LANTHEUS HOLDIN Common Stock 516544103 336,946 126,947 60.45 23 35.29 0.0318
2023-08-15 2023-06-30 13F LANTHEUS HOLDIN Common Stock 516544103 209,999 204,912 4,028.15 18 0.0217
2023-05-15 2023-03-31 13F LANTHEUS HOLDIN Common Stock 516544103 5,087 -20,991 -80.49 0 -100.00 0.0005
2023-02-15 2022-12-31 13F LANTHEUS HOLDIN Common Stock 516544103 26,078 690 2.72 1,328 -25.56 0.0018
2022-11-14 2022-09-30 13F LANTHEUS HOLDIN Common Stock 516544103 25,388 2,415 10.51 1,784 17.68 0.0026
2022-08-09 2022-06-30 13F LANTHEUS HOLDIN Common Stock 516544103 22,973 0 0.00 1,516 19.37 0.0021
2022-05-13 2022-03-31 13F LANTHEUS HOLDIN Common Stock 516544103 22,973 22,973 1,270 0.0015
2020-11-13 2020-09-30 13F LANTHEUS HOLDIN Common Stock 516544103 0 -212 -100.00 0 -100.00
2020-08-13 2020-06-30 13F LANTHEUS HOLDIN Common Stock 516544103 212 212 3 0.0000
2020-02-13 2019-12-31 13F LANTHEUS HOLDIN Common Stock 516544103 0 -182,441 -100.00 0 -100.00
2019-11-14 2019-09-30 13F LANTHEUS HOLDIN Common Stock 516544103 182,441 8,841 5.09 4,572 -6.92 0.0075
2019-08-14 2019-06-30 13F LANTHEUS HOLDIN Common Stock 516544103 173,600 -153,235 -46.88 4,912 -38.60 0.0080
2019-08-28 2019-03-31 13F/A-1 LANTHEUS HOLDIN Common Stock 516544103 326,835 2,460 0.76 8,000 57.60 0.0131
2019-05-13 2019-03-31 13F LANTHEUS HOLDIN Common Stock 516544103 326,835 2,460 8,000
2019-08-28 2018-12-31 13F/A-1 LANTHEUS HOLDIN Common Stock 516544103 324,375 44,540 15.92 5,076 21.35 0.0093
2019-02-13 2018-12-31 13F LANTHEUS HOLDIN Common Stock 516544103 324,375 44,540 5,076
2019-08-30 2018-09-30 13F/A-1 LANTHEUS HOLDIN Common Stock 516544103 279,835 8,675 3.20 4,183 6.03 0.0068
2018-11-13 2018-09-30 13F LANTHEUS HOLDIN Common Stock 516544103 279,835 8,675 4,183
2019-08-30 2018-06-30 13F/A-1 LANTHEUS HOLDIN Common Stock 516544103 271,160 42,598 18.64 3,945 8.56 0.0069
2018-08-13 2018-06-30 13F LANTHEUS HOLDIN Common Stock 516544103 271,160 42,598 3,945
2019-08-28 2018-03-31 13F/A-1 LANTHEUS HOLDIN Common Stock 516544103 228,562 228,562 3,634 0.0062
2018-05-14 2018-03-31 13F LANTHEUS HOLDIN Common Stock 516544103 228,562 228,562 3,634
2019-08-28 2017-12-31 13F/A-1 LANTHEUS HOLDIN Common Stock 516544103 0 -43,160 -100.00 0 -100.00
2019-08-19 2017-09-30 13F/A-1 LANTHEUS HOLDIN Common Stock 516544103 43,160 -19,486 -31.10 768 -30.50 0.0014
2017-11-13 2017-09-30 13F LANTHEUS HOLDIN Common Stock 516544103 43,160 -19,486 768
2019-08-19 2017-06-30 13F/A-1 LANTHEUS HOLDIN Common Stock 516544103 62,646 62,646 1,105 0.0021
2017-08-11 2017-06-30 13F LANTHEUS HOLDIN Common Stock 516544103 62,646 1,105
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.