Alkermes plc
DE ˙ DB ˙ IE00B56GVS15
36,46 € ↑0,50 (1,39%)
2026-06-04
DEL PRIS
SecurityDE:8AK / Alkermes plc
InstitutionBnp Paribas Arbitrage, Sa
Latest Disclosed Ownership527,967 shares
Latest Disclosed Value $ 18,668,913
Bnp Paribas Arbitrage, Sa reports 22.69% increase in ownership of 8AK / Alkermes plc

On May 12, 2026 - Bnp Paribas Arbitrage, Sa filed a 13F-HR form disclosing ownership of 527,967 shares of Alkermes plc (DE:8AK) valued at $13,727,142 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 430,330 shares of Alkermes plc. This represents a change in shares of 22.69% during the quarter. The current value of the position is $19,249,677 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)
2026-05-12 2026-03-31 13F Alkermes Equity G01767105 527,967 97,637 22.69 18,669 55.05 0.0009
2026-02-10 2025-12-31 13F Alkermes Equity G01767105 430,330 -330,873 -43.47 12,041 -47.28 0.0055
2025-11-13 2025-09-30 13F Alkermes Equity G01767105 761,203 -374,275 -32.96 22,836 -29.71 0.0122
2025-08-14 2025-06-30 13F Alkermes Equity G01767105 1,135,478 1,007,488 787.16 32,486 668.72 0.0186
2025-05-14 2025-03-31 13F Alkermes Equity G01767105 127,990 -89,990 -41.28 4,226 -32.59 0.0025
2025-02-14 2024-12-31 13F Alkermes Equity G01767105 217,980 68,487 45.81 6,269 49.83 0.0035
2024-11-13 2024-09-30 13F Alkermes Equity G01767105 149,493 63,939 74.74 4,184 103.01 0.0028
2024-08-13 2024-06-30 13F Alkermes Equity G01767105 85,554 -143,449 -62.64 2,062 -66.75 0.0017
2024-05-01 2024-03-31 13F Alkermes Equity G01767105 229,003 -14,958 -6.13 6,199 -8.39 0.0054
2024-02-14 2023-12-31 13F/A-2 Alkermes Equity G01767105 243,961 -190,381 -43.83 6,767 -44.37 0.0077
2024-02-07 2023-12-31 13F/A-1 Alkermes Equity G01767105 243,961 -190,381 6,767 0.0010
2024-02-07 2023-12-31 13F Alkermes Equity G01767105 243,961 6,767
2023-11-14 2023-09-30 13F Alkermes Equity G01767105 434,342 158,426 57.42 12,166 40.86 0.0156
2023-08-09 2023-06-30 13F Alkermes Equity G01767105 275,916 111,771 68.09 8,636 86.64 0.0108
2023-05-12 2023-03-31 13F ALKERMES EQUITY G01767105 164,145 4,433 2.78 4,627 10.88 0.0065
2023-02-14 2022-12-31 13F Alkermes Equity G01767105 159,712 -43,142 -21.27 4,173 -7.86 0.0064
2022-11-16 2022-09-30 13F/A-1 Alkermes Equity G01767105 202,854 47,833 30.86 4,530 -1.93 0.0072
2022-11-15 2022-09-30 13F Alkermes Equity G01767105 202,854 47,833 4,530 0.0011
2022-08-12 2022-06-30 13F Alkermes Equity G01767105 155,021 96,769 166.12 4,618 201.44 0.0072
2022-05-18 2022-03-31 13F/A-1 Alkermes Equity G01767105 58,252 -50,992 -46.68 1,533 -39.71 0.0021
2022-02-09 2021-12-31 13F ALKERMES EQUITY G01767105 109,244 50,585 86.24 2,541 40.46 0.0036
2021-11-16 2021-09-30 13F/A-1 ALKERMES EQUITY G01767105 58,659 3,196 5.76 1,809 33.11 0.0026
2021-11-12 2021-09-30 13F ALKERMES EQUITY G01767105 187,287 131,824 3,103 0.0000
2021-08-10 2021-06-30 13F ALKERMES EQUITY G01767105 55,463 12,957 30.48 1,360 71.16 0.0018
2021-05-07 2021-03-31 13F ALKERMES EQUITY G01767105 42,506 -513,493 -92.36 794 -92.84 0.0012
2021-02-10 2020-12-31 13F ALKERMES EQUITY G01767105 555,999 368,712 196.87 11,092 257.46 0.0206
2020-10-30 2020-09-30 13F ALKERMES EQUITY G01767105 187,287 116,170 163.35 3,103 124.86 0.0044
2020-08-06 2020-06-30 13F ALKERMES EQUITY G01767105 71,117 -966,308 -93.14 1,380 -90.77 0.0024
2020-05-13 2020-03-31 13F ALKERMES EQUITY G01767105 1,037,425 859,542 483.21 14,960 312.32 0.0307
2020-02-12 2019-12-31 13F ALKERMES EQUITY G01767105 177,883 69,046 63.44 3,629 70.89 0.0066
2019-11-07 2019-09-30 13F ALKERMES EQUITY G01767105 108,837 -266,585 -71.01 2,123 -74.91 0.0038
2019-07-30 2019-06-30 13F ALKERMES EQUITY G01767105 375,422 299,333 393.40 8,462 204.83 0.0169
2019-04-25 2019-03-31 13F ALKERMES EQUITY G01767105 76,089 24,304 46.93 2,776 81.68 0.0060
2019-02-12 2018-12-31 13F ALKERMES EQUITY G01767105 51,785 -85,648 -62.32 1,528 -73.80 0.0036
2018-11-07 2018-09-30 13F ALKERMES EQUITY G01767105 137,433 40,410 41.65 5,833 46.06 0.0086
2018-07-25 2018-06-30 13F ALKERMES EQUITY G01767105 97,023 -25,798 -21.00 3,993 -43.90 0.0066
2018-05-11 2018-03-31 13F ALKERMES EQUITY G01767105 122,821 12,062 10.89 7,119 17.44 0.0133
2018-03-05 2017-12-31 13F/A-1 ALKERMES EQUITY G01767105 110,759 79,576 255.19 6,062 282.40 0.0107
2018-02-01 2017-12-31 13F ALKERMES EQUITY G01767105 110,759 79,576 6,062
2017-11-03 2017-09-30 13F ALKERMES STOCK G01767105 31,183 -1,381 -4.24 1,585 -16.00 0.0039
2017-08-03 2017-06-30 13F ALKERMES STOCK G01767105 32,564 14,616 81.44 1,888 79.89 0.0057
2017-05-03 2017-03-31 13F ALKERMES STOCK G01767105 17,948 5,597 45.32 1,050 52.92 0.0028
2017-02-14 2016-12-31 13F ALKERMES STOCK G01767105 12,351 -3,013 -19.61 686 -4.99 0.0032
2016-10-05 2016-09-30 13F * ALKERMES PLC SHS STOCK G01767105 15,364 -46,080 -75.00 723 -72.81 0.0030
2016-07-06 2016-06-30 13F * ALKERMES PLC SHS STOCK G01767105 61,444 49,716 423.91 2,656 563.75 0.0120
2016-04-22 2016-03-31 13F * ALKERMES PLC SHS STOCK G01767105 11,728 879 8.10 401 -53.54 0.0017
2016-04-19 2015-12-31 13F/A-1 * ALKERMES PLC SHS STOCK G01767105 10,849 -4,989 -31.50 861 -7.32 0.0042
2016-02-10 2015-12-31 13F * ALKERMES PLC SHS STOCK G01767105 10,849 861
2015-11-13 2015-09-30 13F * ALKERMES PLC SHS STOCK G01767105 15,838 -2,543 -13.83 929 -21.40 0.0023
2015-08-14 2015-06-30 13F ALKERMES PLC SHS STOCK G01767105 18,381 -78,957 -81.12 1,183 -80.08 0.0033
2015-05-15 2015-03-31 13F * ALKERMES PLC SHS STOCK G01767105 97,338 97,202 71,472.06 5,935 84,671.43 0.0164
2015-03-10 2014-12-31 13F/A-1 * ALKERMES PLC SHS STOCK G01767105 136 -1,064 -88.67 8 -86.27 0.0000
2015-02-11 2014-12-31 13F * ALKERMES PLC SHS STOCK G01767105 136 8
2014-11-12 2014-09-30 13F * ALKERMES PLC SHS STOCK G01767105 1,200 1,200 51 0.0000
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.