Alkermes plc
US ˙ NasdaqGS ˙ IE00B56GVS15

SecurityALKS / Alkermes plc
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership2,968,785 shares
Latest Disclosed Value $ 104,976,237
First Trust Advisors Lp reports 104.18% increase in ownership of ALKS / Alkermes plc

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 2,968,785 shares of Alkermes plc (US:ALKS) valued at $104,976,238 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,454,002 shares of Alkermes plc. This represents a change in shares of 104.18% during the quarter. The current value of the position is $126,945,247 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 ALKERMES SHS G01767105 2,968,785 1,514,783 104.18 104,976 158.04 0.0750
2026-02-13 2025-12-31 13F ALKERMES SHS G01767105 1,454,002 55,981 4.00 40,683 -3.00 0.0296
2025-11-12 2025-09-30 13F ALKERMES SHS G01767105 1,398,021 740 0.05 41,941 4.91 0.0312
2025-08-13 2025-06-30 13F ALKERMES SHS G01767105 1,397,281 -223,765 -13.80 39,976 -25.31 0.0322
2025-05-14 2025-03-31 13F ALKERMES SHS G01767105 1,621,046 127,395 8.53 53,527 24.60 0.0474
2025-02-13 2024-12-31 13F ALKERMES SHS G01767105 1,493,651 -287,484 -16.14 42,957 -13.83 0.0379
2024-11-13 2024-09-30 13F ALKERMES SHS G01767105 1,781,135 243,023 15.80 49,854 34.49 0.0475
2024-08-13 2024-06-30 13F ALKERMES SHS G01767105 1,538,112 65,244 4.43 37,068 -7.03 0.0378
2024-05-13 2024-03-31 13F ALKERMES SHS G01767105 1,472,868 -178,172 -10.79 39,871 -12.95 0.0405
2024-02-13 2023-12-31 13F ALKERMES SHS G01767105 1,651,040 163,251 10.97 45,800 9.90 0.0500
2023-11-13 2023-09-30 13F ALKERMES SHS G01767105 1,487,789 -235,780 -13.68 41,673 -22.75 0.0494
2023-08-14 2023-06-30 13F ALKERMES SHS G01767105 1,723,569 -196,950 -10.26 53,948 -0.35 0.0613
2023-05-15 2023-03-31 13F ALKERMES SHS G01767105 1,920,519 -88,426 -4.40 54,139 3.13 0.0625
2023-02-09 2022-12-31 13F ALKERMES SHS G01767105 2,008,945 320,970 19.02 52,495 39.27 0.0624
2022-11-14 2022-09-30 13F ALKERMES SHS G01767105 1,687,975 -147,014 -8.01 37,692 -31.05 0.0489
2022-08-12 2022-06-30 13F ALKERMES SHS G01767105 1,834,989 -205,595 -10.08 54,664 1.82 0.0675
2022-05-13 2022-03-31 13F ALKERMES SHS G01767105 2,040,584 -43,424 -2.08 53,688 10.76 0.0549
2022-02-08 2021-12-31 13F ALKERMES SHS G01767105 2,084,008 -631,186 -23.25 48,474 -42.11 0.0472
2021-11-15 2021-09-30 13F ALKERMES SHS G01767105 2,715,194 -436,095 -13.84 83,737 8.37 0.0900
2021-10-12 2021-06-30 13F/A-1 ALKERMES SHS G01767105 3,151,289 -115,128 -3.52 77,270 26.64 0.0836
2021-08-16 2021-06-30 13F ALKERMES SHS G01767105 3,151,289 -115,128 77,270 0.0797
2021-05-14 2021-03-31 13F ALKERMES SHS G01767105 3,266,417 -610,157 -15.74 61,017 -21.10 0.0739
2021-02-02 2020-12-31 13F ALKERMES SHS G01767105 3,876,574 77,794 2.05 77,338 22.86 0.1025
2020-11-05 2020-09-30 13F ALKERMES SHS G01767105 3,798,780 -197,498 -4.94 62,946 -18.83 0.1008
2020-07-22 2020-06-30 13F ALKERMES SHS G01767105 3,996,278 1,040,851 35.22 77,548 81.96 0.1344
2020-05-06 2020-03-31 13F ALKERMES SHS G01767105 2,955,427 153,087 5.46 42,617 -25.45 0.0966
2020-02-03 2019-12-31 13F ALKERMES SHS G01767105 2,802,340 194,365 7.45 57,168 12.35 0.0976
2019-11-04 2019-09-30 13F ALKERMES SHS G01767105 2,607,975 -229,795 -8.10 50,882 -20.45 0.0958
2019-07-30 2019-06-30 13F ALKERMES SHS G01767105 2,837,770 -69,090 -2.38 63,963 -39.70 0.1206
2019-06-19 2019-03-31 13F/A-1 ALKERMES SHS G01767105 2,906,860 655,873 29.14 106,071 59.68 0.2109
2019-05-09 2019-03-31 13F ALKERMES SHS G01767105 2,906,860 655,873 106,071
2019-02-07 2018-12-31 13F ALKERMES SHS G01767105 2,250,987 54,853 2.50 66,427 -28.73 0.1575
2018-10-25 2018-09-30 13F ALKERMES SHS G01767105 2,196,134 881,946 67.11 93,204 72.31 0.1735
2018-08-02 2018-06-30 13F ALKERMES SHS G01767105 1,314,188 393,772 42.78 54,092 1.40 0.1122
2018-04-23 2018-03-31 13F ALKERMES SHS G01767105 920,416 119,664 14.94 53,347 21.73 0.1225
2018-02-08 2017-12-31 13F ALKERMES SHS G01767105 800,752 125,309 18.55 43,825 27.62 0.1043
2017-10-24 2017-09-30 13F ALKERMES SHS G01767105 675,443 -304,370 -31.06 34,340 -39.54 0.0883
2017-08-02 2017-06-30 13F ALKERMES SHS G01767105 979,813 267,742 37.60 56,800 36.35 0.1516
2017-05-02 2017-03-31 13F ALKERMES SHS G01767105 712,071 208,132 41.30 41,656 48.72 0.1154
2017-02-06 2016-12-31 13F ALKERMES SHS G01767105 503,939 -67,579 -11.82 28,009 4.21 0.0834
2016-11-01 2016-09-30 13F ALKERMES SHS G01767105 571,518 -152,749 -21.09 26,878 -14.14 0.0802
2016-08-04 2016-06-30 13F ALKERMES SHS G01767105 724,267 -152,101 -17.36 31,303 4.47 0.0986
2016-05-10 2016-03-31 13F ALKERMES SHS G01767105 876,368 -816,708 -48.24 29,963 -77.71 0.0963
2016-05-04 2015-12-31 13F/A-1 ALKERMES SHS G01767105 1,693,076 -155,007 -8.39 134,396 23.95 0.3488
2016-02-03 2015-12-31 13F ALKERMES SHS G01767105 1,693,076 134,396
2015-11-05 2015-09-30 13F ALKERMES SHS G01767105 1,848,083 -3,150 -0.17 108,427 -8.97 0.3141
2015-08-04 2015-06-30 13F ALKERMES SHS G01767105 1,851,233 -268,527 -12.67 119,108 -7.84 0.3091
2015-05-04 2015-03-31 13F ALKERMES SHS G01767105 2,119,760 677,025 46.93 129,242 52.97 0.3796
2015-02-13 2014-12-31 13F ALKERMES SHS G01767105 1,442,735 627,340 76.94 84,487 141.70 0.2850
2014-11-12 2014-09-30 13F ALKERMES SHS G01767105 815,395 198,362 32.15 34,956 12.56 0.1375
2014-08-11 2014-06-30 13F ALKERMES SHS G01767105 617,033 -198,882 -24.38 31,055 -13.67 0.1290
2014-05-12 2014-03-31 13F ALKERMES SHS G01767105 815,915 119,459 17.15 35,974 27.04 0.1581
2014-08-08 2013-12-31 13F/A-1 ALKERMES SHS G01767105 696,456 -161,867 -18.86 28,318 -1.87 0.1373
2014-02-13 2013-12-31 13F ALKERMES SHS G01767105 696,456 28,318
2013-11-12 2013-09-30 13F ALKERMES SHS G01767105 858,323 858,323 28,857 0.1564
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.