Lantheus Holdings, Inc.
US ˙ NasdaqGM ˙ US5165441032

SecurityLNTH / Lantheus Holdings, Inc.
InstitutionTd Asset Management Inc
Latest Disclosed Ownership1,133,518 shares
Latest Disclosed Value $ 85,977,340
Td Asset Management Inc reports 59.23% increase in ownership of LNTH / Lantheus Holdings, Inc.

On May 11, 2026 - Td Asset Management Inc filed a 13F-HR form disclosing ownership of 1,133,518 shares of Lantheus Holdings, Inc. (US:LNTH) valued at $85,977,340 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 711,894 shares of Lantheus Holdings, Inc.. This represents a change in shares of 59.23% during the quarter. The current value of the position is $114,462,648 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)
2026-05-11 2026-03-31 13F LANTHEUS HLDGS COM 516544103 1,133,518 421,624 59.23 85,977 81.48 0.0373
2026-02-10 2025-12-31 13F LANTHEUS HLDGS COM 516544103 711,894 -79,056 -10.00 47,377 16.78 0.0381
2025-11-10 2025-09-30 13F LANTHEUS HLDGS COM 516544103 790,950 158,358 25.03 40,568 -21.66 0.0329
2025-07-28 2025-06-30 13F LANTHEUS HLDGS COM 516544103 632,592 -50,022 -7.33 51,784 -22.27 0.0442
2025-05-07 2025-03-31 13F LANTHEUS HLDGS COM 516544103 682,614 622,100 1,028.03 66,623 1,130.80 0.0613
2025-02-11 2024-12-31 13F LANTHEUS HLDGS COM 516544103 60,514 2,400 4.13 5,414 -13.24 0.0048
2024-11-01 2024-09-30 13F LANTHEUS HLDGS COM 516544103 58,114 15,156 35.28 6,239 80.89 0.0055
2024-08-02 2024-06-30 13F LANTHEUS HLDGS COM 516544103 42,958 -17,800 -29.30 3,449 -8.78 0.0032
2024-05-08 2024-03-31 13F LANTHEUS HLDGS COM 516544103 60,758 -33,414 -35.48 3,782 -35.23 0.0035
2024-02-12 2023-12-31 13F LANTHEUS HLDGS COM 516544103 94,172 13,280 16.42 5,839 3.88 0.0057
2023-10-27 2023-09-30 13F LANTHEUS HLDGS COM 516544103 80,892 40,346 99.51 5,620 65.20 0.0068
2023-08-09 2023-06-30 13F LANTHEUS HLDGS COM 516544103 40,546 14,256 54.23 3,403 56.77 0.0039
2023-05-10 2023-03-31 13F LANTHEUS HLDGS COM 516544103 26,290 14,600 124.89 2,171 264.71 0.0026
2023-02-07 2022-12-31 13F LANTHEUS HLDGS COM 516544103 11,690 -26,284 -69.22 596 -77.30 0.0007
2022-11-07 2022-09-30 13F LANTHEUS HLDGS COM 516544103 37,974 -18,653 -32.94 2,621 -29.90 0.0033
2022-08-04 2022-06-30 13F LANTHEUS HLDGS COM 516544103 56,627 -25,900 -31.38 3,739 -18.09 0.0043
2022-05-10 2022-03-31 13F LANTHEUS HLDGS COM 516544103 82,527 6,293 8.25 4,565 107.31 0.0027
2022-02-10 2021-12-31 13F LANTHEUS HLDGS COM 516544103 76,234 0 0.00 2,202 12.46 0.0018
2021-11-09 2021-09-30 13F LANTHEUS HLDGS COM 516544103 76,234 2,700 3.67 1,958 1.77 0.0020
2021-08-11 2021-06-30 13F LANTHEUS HLDGS COM 516544103 73,534 0 0.00 1,924 22.47 0.0020
2021-05-14 2021-03-31 13F LANTHEUS HLDGS COM 516544103 73,534 0 0.00 1,571 58.37 0.0018
2021-02-16 2020-12-31 13F LANTHEUS HLDGS COM 516544103 73,534 0 0.00 992 6.44 0.0012
2020-11-10 2020-09-30 13F LANTHEUS HLDGS COM 516544103 73,534 0 0.00 932 -11.41 0.0013
2020-08-13 2020-06-30 13F LANTHEUS HLDGS COM 516544103 73,534 20,925 39.77 1,052 56.78 0.0015
2020-05-15 2020-03-31 13F LANTHEUS HLDGS COM 516544103 52,609 -8,100 -13.34 671 -46.10 0.0011
2020-02-11 2019-12-31 13F LANTHEUS HLDGS COM 516544103 60,709 0 0.00 1,245 -18.20 0.0018
2019-11-07 2019-09-30 13F LANTHEUS HLDGS COM 516544103 60,709 -2,300 -3.65 1,522 -14.64 0.0023
2019-08-01 2019-06-30 13F LANTHEUS HLDGS COM 516544103 63,009 900 1.45 1,783 17.30 0.0027
2019-05-08 2019-03-31 13F LANTHEUS HLDGS COM 516544103 62,109 9,200 17.39 1,520 83.57 0.0023
2019-02-01 2018-12-31 13F LANTHEUS HLDGS COM 516544103 52,909 -11,700 -18.11 828 -14.29 0.0014
2018-11-01 2018-09-30 13F LANTHEUS HLDGS COM 516544103 64,609 -19,000 -22.72 966 -20.62 0.0014
2018-07-31 2018-06-30 13F LANTHEUS HLDGS COM 516544103 83,609 -23,841 -22.19 1,217 -28.75 0.0019
2018-05-11 2018-03-31 13F LANTHEUS HLDGS COM 516544103 107,450 -8,400 -7.25 1,708 -27.90 0.0026
2018-02-02 2017-12-31 13F LANTHEUS HLDGS COM 516544103 115,850 -17,852 -13.35 2,369 -0.46 0.0035
2017-11-09 2017-09-30 13F LANTHEUS HLDGS COM 516544103 133,702 -19,478 -12.72 2,380 -11.98 0.0036
2017-08-01 2017-06-30 13F LANTHEUS HLDGS COM 516544103 153,180 -10,500 -6.41 2,704 32.16 0.0043
2017-05-05 2017-03-31 13F LANTHEUS HLDGS COM 516544103 163,680 -200 -0.12 2,046 45.21 0.0033
2017-02-08 2016-12-31 13F LANTHEUS HLDGS COM 516544103 163,880 8,300 5.33 1,409 9.39 0.0024
2016-11-02 2016-09-30 13F LANTHEUS HLDGS COM 516544103 155,580 31,080 24.96 1,288 181.84 0.0022
2016-08-04 2016-06-30 13F LANTHEUS HLDGS COM 516544103 124,500 0 0.00 457 94.47 0.0008
2016-05-05 2016-03-31 13F LANTHEUS HLDGS COM 516544103 124,500 -100 -0.08 235 -44.18 0.0004
2016-02-04 2015-12-31 13F LANTHEUS HLDGS COM 516544103 124,600 -13,300 -9.64 421 -29.01 0.0008
2015-11-12 2015-09-30 13F LANTHEUS HLDGS COM 516544103 137,900 21,300 18.27 593 -17.87 0.0012
2015-08-11 2015-06-30 13F LANTHEUS HLDGS COM 516544103 116,600 116,600 722 0.0013
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.