Alkermes plc
DE ˙ DB ˙ IE00B56GVS15
36,95 € ↑0,49 (1,34%)
2026-06-05
DEL PRIS
SecurityDE:8AK / Alkermes plc
InstitutionGuggenheim Capital Llc
Latest Disclosed Ownership28,649 shares
Latest Disclosed Value $ 1,013,029
Guggenheim Capital Llc ownership in 8AK / Alkermes plc

On May 15, 2026 - Guggenheim Capital Llc filed a 13F-HR form disclosing ownership of 28,649 shares of Alkermes plc (DE:8AK) valued at $744,874 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 13, 2025 disclosing 0 shares of Alkermes plc. The current value of the position is $1,058,581 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)
2026-05-15 2026-03-31 13F ALKERMES SHS G01767105 28,649 28,649 1,013 0.0039
2025-11-13 2025-09-30 13F ALKERMES SHS G01767105 0 -8,869 -100.00 0 -100.00
2025-08-13 2025-06-30 13F ALKERMES SHS G01767105 8,869 -43,487 -83.06 254 -85.36 0.0020
2025-05-14 2025-03-31 13F ALKERMES SHS G01767105 52,356 -5,003 -8.72 1,729 4.79 0.0159
2025-02-13 2024-12-31 13F ALKERMES SHS G01767105 57,359 -33,635 -36.96 1,650 -35.23 0.0134
2024-11-13 2024-09-30 13F ALKERMES SHS G01767105 90,994 -16,261 -15.16 2,547 -1.47 0.0178
2024-08-14 2024-06-30 13F ALKERMES SHS G01767105 107,255 11,740 12.29 2,585 -0.04 0.0183
2024-05-14 2024-03-31 13F ALKERMES SHS G01767105 95,515 16,856 21.43 2,586 18.47 0.0182
2024-02-14 2023-12-31 13F ALKERMES SHS G01767105 78,659 2,237 2.93 2,182 1.96 0.0165
2023-11-14 2023-09-30 13F ALKERMES SHS G01767105 76,422 10,426 15.80 2,141 3.63 0.0184
2023-08-11 2023-06-30 13F ALKERMES SHS G01767105 65,996 -13,079 -16.54 2,066 -7.36 0.0162
2023-05-11 2023-03-31 13F ALKERMES SHS G01767105 79,075 79,075 2,229 0.0188
2022-02-14 2021-12-31 13F ALKERMES SHS G01767105 0 -83,866 -100.00 0 -100.00
2021-11-15 2021-09-30 13F ALKERMES SHS G01767105 83,866 83,866 2,586 0.0155
2021-05-13 2021-03-31 13F ALKERMES SHS G01767105 0 -18,370 -100.00 0 -100.00
2021-02-16 2020-12-31 13F ALKERMES SHS G01767105 18,370 -117,975 -86.53 366 -83.80 0.0023
2020-11-13 2020-09-30 13F ALKERMES SHS G01767105 136,345 -65,168 -32.34 2,259 -42.23 0.0164
2020-08-14 2020-06-30 13F ALKERMES SHS G01767105 201,513 73,044 56.86 3,910 111.01 0.0303
2020-06-02 2020-03-31 13F ALKERMES SHS G01767105 128,469 -30,040 -18.95 1,853 -42.70 0.0187
2020-02-20 2019-12-31 13F/A-1 ALKERMES SHS G01767105 158,509 48,549 44.15 3,234 50.77 0.0243
2020-02-14 2019-12-31 13F ALKERMES SHS G01767105 158,509 48,549 3,234 19,167.2715
2020-02-20 2019-09-30 13F/A-1 ALKERMES SHS G01767105 109,960 -31,356 -22.19 2,145 -32.65 0.0171
2019-11-14 2019-09-30 13F ALKERMES SHS G01767105 109,960 -31,356 2,145 15,719.1892
2019-08-14 2019-06-30 13F ALKERMES SHS G01767105 141,316 28,625 25.40 3,185 -22.54 0.0259
2019-05-15 2019-03-31 13F ALKERMES SHS G01767105 112,691 7,988 7.63 4,112 33.07 0.0335
2019-02-14 2018-12-31 13F ALKERMES SHS G01767105 104,703 -9,020 -7.93 3,090 -35.97 0.0262
2018-11-14 2018-09-30 13F ALKERMES SHS G01767105 113,723 13,430 13.39 4,826 16.91 0.0314
2018-08-14 2018-06-30 13F ALKERMES SHS G01767105 100,293 14,620 17.06 4,128 -16.86 0.0276
2018-05-15 2018-03-31 13F ALKERMES SHS G01767105 85,673 3,160 3.83 4,965 9.94 0.0121
2018-02-14 2017-12-31 13F ALKERMES SHS G01767105 82,513 -36,360 -30.59 4,516 -25.27 0.0107
2017-11-14 2017-09-30 13F ALKERMES SHS G01767105 118,873 37,357 45.83 6,043 27.89 0.0142
2017-08-14 2017-06-30 13F ALKERMES SHS G01767105 81,516 -5,057 -5.84 4,725 -6.71 0.0125
2017-05-15 2017-03-31 13F ALKERMES SHS G01767105 86,573 10,700 14.10 5,065 20.11 0.0137
2017-02-14 2016-12-31 13F ALKERMES SHS G01767105 75,873 -27,806 -26.82 4,217 -13.52 0.0121
2016-11-14 2016-09-30 13F ALKERMES SHS G01767105 103,679 -5,660 -5.18 4,876 3.17 0.0152
2016-08-15 2016-06-30 13F ALKERMES SHS G01767105 109,339 -54,850 -33.41 4,726 -15.82 0.0148
2016-05-16 2016-03-31 13F ALKERMES SHS G01767105 164,189 60,638 58.56 5,614 -31.70 0.0177
2016-02-16 2015-12-31 13F ALKERMES SHS G01767105 103,551 -50,349 -32.72 8,220 -8.96 0.0239
2015-11-16 2015-09-30 13F ALKERMES SHS G01767105 153,900 -45,162 -22.69 9,029 -29.50 0.0278
2015-08-14 2015-06-30 13F ALKERMES SHS G01767105 199,062 -17,903 -8.25 12,808 -3.18 0.0316
2015-05-18 2015-03-31 13F/A-1 ALKERMES SHS G01767105 216,965 20,704 10.55 13,228 15.10 0.0313
2015-05-15 2015-03-31 13F ALKERMES SHS G01767105 216,965 13,228
2015-02-17 2014-12-31 13F ALKERMES SHS G01767105 196,261 31,260 18.95 11,493 62.47 0.0288
2014-11-14 2014-09-30 13F ALKERMES SHS G01767105 165,001 11,037 7.17 7,074 -8.71 0.0171
2014-08-14 2014-06-30 13F ALKERMES SHS G01767105 153,964 -40,446 -20.80 7,749 -9.60 0.0196
2014-05-16 2014-03-31 13F ALKERMES SHS G01767105 194,410 22,207 12.90 8,572 22.42 0.0244
2014-02-14 2013-12-31 13F ALKERMES SHS G01767105 172,203 -28,046 -14.01 7,002 4.01 0.0213
2013-11-14 2013-09-30 13F ALKERMES SHS G01767105 200,249 -19,423 -8.84 6,732 6.86 0.0242
2013-08-22 2013-06-30 13F/A-1 ALKERMES SHS G01767105 219,672 219,672 6,300 0.0265
2013-08-14 2013-06-30 13F ALKERMES SHS G01767105 219,672 6,300
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.