Lantheus Holdings, Inc.
US ˙ NasdaqGM ˙ US5165441032

SecurityLNTH / Lantheus Holdings, Inc.
InstitutionAmalgamated Bank
Latest Disclosed Ownership28,690 shares
Latest Disclosed Value $ 2,176
Amalgamated Bank reports 2.67% increase in ownership of LNTH / Lantheus Holdings, Inc.

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 28,690 shares of Lantheus Holdings, Inc. (US:LNTH) valued at $2,176,136 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 27,945 shares of Lantheus Holdings, Inc.. This represents a change in shares of 2.67% during the quarter. The current value of the position is $2,876,172 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)
2026-05-08 2026-03-31 13F LANTHEUS HOLDING COM 516544103 28,690 745 2.67 2 100.00 0.0167
2026-02-05 2025-12-31 13F LANTHEUS HOLDING COM 516544103 27,945 -1,898 -6.36 2 0.00 0.0134
2025-10-29 2025-09-30 13F LANTHEUS HOLDING COM 516544103 29,843 -569 -1.87 2 -50.00 0.0109
2025-08-04 2025-06-30 13F LANTHEUS HOLDING COM 516544103 30,412 -168 -0.55 2 0.00 0.0192
2025-04-25 2025-03-31 13F LANTHEUS HOLDING COM 516544103 30,580 -1,201 -3.78 3 0.00 0.0255
2025-02-04 2024-12-31 13F LANTHEUS HOLDING COM 516544103 31,781 0 0.00 3 -33.33 0.0233
2024-10-30 2024-09-30 13F LANTHEUS HOLDING COM 516544103 31,781 -1,847 -5.49 3 50.00 0.0287
2024-08-12 2024-06-30 13F LANTHEUS HOLDING COM 516544103 33,628 -2,272 -6.33 3 0.00 0.0230
2024-04-23 2024-03-31 13F LANTHEUS HOLDING COM 516544103 35,900 -7,504 -17.29 2 0.00 0.0191
2024-02-06 2023-12-31 13F LANTHEUS HOLDING COM 516544103 43,404 -138 -0.32 3 -33.33 0.0215
2023-11-08 2023-09-30 13F LANTHEUS HOLDING COM 516544103 43,542 -1,112 -2.49 3 0.00 0.0258
2023-08-11 2023-06-30 13F LANTHEUS HOLDING COM 516544103 44,654 -1,356 -2.95 4 0.00 0.0303
2023-05-02 2023-03-31 13F LANTHEUS HOLDING COM 516544103 46,010 -2,483 -5.12 4 50.00 0.0324
2023-02-10 2022-12-31 13F LANTHEUS HOLDING COM 516544103 48,493 14,947 44.56 2 -99.92 0.0220
2022-11-09 2022-09-30 13F LANTHEUS HOLDING COM 516544103 33,546 427 1.29 2,359 7.86 0.0228
2022-08-15 2022-06-30 13F LANTHEUS HOLDING COM 516544103 33,119 2,523 8.25 2,187 29.26 0.0204
2022-08-25 2022-03-31 13F/A-1 LANTHEUS HOLDING COM 516544103 30,596 -1,725 -5.34 1,692 81.16 0.0131
2022-06-30 2022-03-31 13F LANTHEUS HOLDING COM 516544103 30,596 -1,725 1,692 0.0134
2022-02-15 2021-12-31 13F/A-1 LANTHEUS HOLDING COM 516544103 32,321 -659 -2.00 934 10.27 0.0069
2022-02-15 2021-12-31 13F LANTHEUS HOLDING COM 516544103 32,321 -659 934 0.0069
2021-10-29 2021-09-30 13F LANTHEUS HOLDING COM 516544103 32,980 -635 -1.89 847 -8.83 0.0072
2021-08-16 2021-06-30 13F LANTHEUS HOLDING COM 516544103 33,615 23,592 235.38 929 334.11 0.0074
2021-05-13 2021-03-31 13F LANTHEUS HOLDING COM 516544103 10,023 -939 -8.57 214 44.59 0.0080
2021-02-12 2020-12-31 13F LANTHEUS HOLDING COM 516544103 10,962 107 0.99 148 7.25 0.0056
2020-10-30 2020-09-30 13F LANTHEUS HOLDING COM 516544103 10,855 -342 -3.05 138 -13.75 0.0060
2020-08-10 2020-06-30 13F LANTHEUS HOLDING COM 516544103 11,197 11,197 160 0.0074
2019-11-13 2019-09-30 13F LANTHEUS HOLDING COM 516544103 0 -7,217 -100.00 0 -100.00
2019-08-14 2019-06-30 13F LANTHEUS HOLDING COM 516544103 7,217 7,217 204 0.0048
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.