Lantheus Holdings, Inc.
US ˙ NasdaqGM ˙ US5165441032

SecurityLNTH / Lantheus Holdings, Inc.
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership21,022 shares
Latest Disclosed Value $ 1,595
Natixis Advisors, L.p. ownership in LNTH / Lantheus Holdings, Inc.

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 21,022 shares of Lantheus Holdings, Inc. (US:LNTH) valued at $1,594,519 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 0 shares of Lantheus Holdings, Inc.. The current value of the position is $2,107,456 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)
2026-05-13 2026-03-31 13F LANTHEUS HLDGS COM 516544103 21,022 21,022 2 0.0022
2026-02-10 2025-12-31 13F LANTHEUS HLDGS INC COM 516544103 0 -15,805 -100.00 0 0.0000
2025-11-13 2025-09-30 13F LANTHEUS HLDGS INC COM 516544103 15,805 -8,530 -35.05 1 -100.00 0.0012
2025-08-13 2025-06-30 13F LANTHEUS HLDGS COM 516544103 24,335 -11,088 -31.30 2 -66.67 0.0032
2025-05-08 2025-03-31 13F LANTHEUS HLDGS COM 516544103 35,423 1,821 5.42 3 0.00 0.0064
2025-02-10 2024-12-31 13F LANTHEUS HLDGS COM 516544103 33,602 -12,843 -27.65 3 -40.00 0.0056
2024-11-06 2024-09-30 13F LANTHEUS HOLDINGS COM 516544103 46,445 3,516 8.19 5 66.67 0.0099
2024-08-01 2024-06-30 13F LANTHEUS HOLDINGS COM 516544103 42,929 7,118 19.88 3 50.00 0.0075
2024-04-25 2024-03-31 13F LANTHEUS HOLDINGS COM 516544103 35,811 -2,110 -5.56 2 0.00 0.0051
2024-02-06 2023-12-31 13F LANTHEUS HOLDINGS COM 516544103 37,921 -14,609 -27.81 2 -33.33 0.0062
2023-11-13 2023-09-30 13F LANTHEUS HLDGS COM 516544103 52,530 33,273 172.78 4 200.00 0.0112
2023-08-15 2023-06-30 13F LANTHEUS HOLDINGS COM 516544103 19,257 8,433 77.91 2 0.0050
2023-05-11 2023-03-31 13F LANTHEUS HLDGS COM 516544103 10,824 10,824 1 0.0031
2023-01-27 2022-12-31 13F LANTHEUS HLDGS COM 516544103 0 -22,323 -100.00 0 -100.00
2022-11-14 2022-09-30 13F LANTHEUS HLDGS COM 516544103 22,323 4,268 23.64 1,570 31.71 0.0066
2022-08-12 2022-06-30 13F LANTHEUS HLDGS COM 516544103 18,055 3,684 25.63 1,192 49.94 0.0052
2022-05-12 2022-03-31 13F LANTHEUS HLDGS COM 516544103 14,371 14,371 795 0.0030
2021-02-12 2020-12-31 13F LANTHEUS HLDGS COM 516544103 0 -135,108 -100.00 0 -100.00
2020-11-12 2020-09-30 13F LANTHEUS HLDGS COM 516544103 135,108 23,566 21.13 1,712 7.34 0.0108
2020-08-11 2020-06-30 13F LANTHEUS HLDGS COM 516544103 111,542 39,628 55.10 1,595 73.75 0.0106
2020-04-27 2020-03-31 13F LANTHEUS HLDGS COM 516544103 71,914 -42,937 -37.38 918 -61.04 0.0075
2020-02-10 2019-12-31 13F LANTHEUS HLDGS COM 516544103 114,851 -6,095 -5.04 2,356 -22.27 0.0166
2019-11-12 2019-09-30 13F LANTHEUS HLDGS COM 516544103 120,946 4,833 4.16 3,031 -7.76 0.0241
2019-08-12 2019-06-30 13F LANTHEUS HLDGS COM 516544103 116,113 -1,668 -1.42 3,286 13.98 0.0268
2019-05-15 2019-03-31 13F/A-1 LANTHEUS HLDGS COM 516544103 117,781 11,659 10.99 2,883 73.67 0.0252
2019-05-15 2019-03-31 13F LANTHEUS HLDGS COM 516544103 117,781 11,659 2,883
2019-02-13 2018-12-31 13F/A-1 LANTHEUS HLDGS COM 516544103 106,122 -14,766 -12.21 1,660 -8.14 0.0164
2019-02-13 2018-12-31 13F LANTHEUS HLDGS COM 516544103 106,122 -14,766 1,660
2018-11-13 2018-09-30 13F LANTHEUS HLDGS COM 516544103 120,888 -4,296 -3.43 1,807 -0.77 0.0159
2018-08-14 2018-06-30 13F/A-1 LANTHEUS HLDGS COM 516544103 125,184 125,184 1,821 0.0174
2018-08-14 2018-06-30 13F LANTHEUS HLDGS COM 516544103 125,184 1,821
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.