Alkermes plc
US ˙ NasdaqGS ˙ IE00B56GVS15

SecurityALKS / Alkermes plc
InstitutionHrt Financial Lp
Latest Disclosed Ownership81,989 shares
Latest Disclosed Value $ 2,899
Hrt Financial Lp reports 59.05% decrease in ownership of ALKS / Alkermes plc

On May 14, 2026 - Hrt Financial Lp filed a 13F-HR form disclosing ownership of 81,989 shares of Alkermes plc (US:ALKS) valued at $2,899,131 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 200,224 shares of Alkermes plc. This represents a change in shares of -59.05% during the quarter. The current value of the position is $3,505,850 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-14 2026-03-31 13F ALKERMES SHS G01767105 81,989 -118,235 -59.05 3 -60.00 0.0072
2026-02-12 2025-12-31 13F ALKERMES SHS G01767105 200,224 181,947 995.50 6 0.0177
2025-11-14 2025-09-30 13F ALKERMES SHS G01767105 18,277 18,277 1 0.0020
2025-08-14 2025-06-30 13F ALKERMES SHS G01767105 0 -122,638 -100.00 0 -100.00
2025-05-15 2025-03-31 13F ALKERMES SHS G01767105 122,638 22,366 22.31 4 100.00 0.0256
2025-02-14 2024-12-31 13F ALKERMES SHS G01767105 100,272 -214,171 -68.11 3 -75.00 0.0149
2024-11-12 2024-09-30 13F ALKERMES SHS G01767105 314,443 314,443 9 0.0437
2024-02-09 2023-12-31 13F ALKERMES SHS G01767105 0 -60,196 -100.00 0 -100.00
2023-11-13 2023-09-30 13F ALKERMES SHS G01767105 60,196 60,196 2 0.0168
2023-08-11 2023-06-30 13F ALKERMES SHS G01767105 0 -29,645 -100.00 0 0.0000
2023-05-12 2023-03-31 13F ALKERMES SHS G01767105 29,645 29,645 1 0.0102
2023-02-10 2022-12-31 13F ALKERMES SHS G01767105 0 -47,546 -100.00 0 -100.00
2022-11-14 2022-09-30 13F ALKERMES SHS G01767105 47,546 21,559 82.96 1,061 37.08 0.0115
2022-08-12 2022-06-30 13F ALKERMES SHS G01767105 25,987 -8,602 -24.87 774 -14.95 0.0085
2022-05-16 2022-03-31 13F ALKERMES SHS G01767105 34,589 34,589 910 0.0065
2021-08-16 2021-06-30 13F ALKERMES SHS G01767105 0 -131,418 -100.00 0 -100.00
2021-05-17 2021-03-31 13F ALKERMES SHS G01767105 131,418 83,935 176.77 2,454 159.13 0.0248
2021-02-16 2020-12-31 13F ALKERMES SHS G01767105 47,483 31,863 203.99 947 267.05 0.0191
2020-11-13 2020-09-30 13F ALKERMES SHS G01767105 15,620 -6,029 -27.85 258 -38.57 0.0075
2020-08-14 2020-06-30 13F ALKERMES SHS G01767105 21,649 21,649 420 0.0126
2020-05-15 2020-03-31 13F ALKERMES SHS G01767105 0 -187,364 -100.00 0 -100.00
2020-02-14 2019-12-31 13F ALKERMES SHS G01767105 187,364 152,797 442.03 3,822 467.06 0.1644
2019-11-14 2019-09-30 13F ALKERMES SHS G01767105 34,567 34,567 674 0.0318
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.