Alkermes plc
US ˙ NasdaqGS ˙ IE00B56GVS15

SecurityALKS / Alkermes plc
InstitutionAmalgamated Bank
Latest Disclosed Ownership47,378 shares
Latest Disclosed Value $ 1,675
Amalgamated Bank reports 1.04% decrease in ownership of ALKS / Alkermes plc

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 47,378 shares of Alkermes plc (US:ALKS) valued at $1,675,286 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 47,875 shares of Alkermes plc. This represents a change in shares of -1.04% during the quarter. The current value of the position is $2,025,883 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)
2026-05-08 2026-03-31 13F ALKERMES PLC SHS COM G01767105 47,378 -497 -1.04 2 0.00 0.0128
2026-02-05 2025-12-31 13F ALKERMES COM G01767105 47,875 762 1.62 1 0.00 0.0097
2025-10-29 2025-09-30 13F ALKERMES COM G01767105 47,113 265 0.57 1 0.00 0.0101
2025-08-04 2025-06-30 13F ALKERMES COM G01767105 46,848 528 1.14 1 0.00 0.0103
2025-04-25 2025-03-31 13F ALKERMES COM G01767105 46,320 -1,154 -2.43 2 0.00 0.0131
2025-02-04 2024-12-31 13F ALKERMES COM G01767105 47,474 -1,179 -2.42 1 0.00 0.0112
2024-10-30 2024-09-30 13F ALKERMES COM G01767105 48,653 -2,934 -5.69 1 0.00 0.0112
2024-08-12 2024-06-30 13F ALKERMES COM G01767105 51,587 -474 -0.91 1 0.00 0.0106
2024-04-23 2024-03-31 13F ALKERMES COM G01767105 52,061 -19,303 -27.05 1 0.00 0.0120
2024-02-06 2023-12-31 13F ALKERMES COM G01767105 71,364 46,027 181.66 2 0.0158
2023-11-08 2023-09-30 13F ALKERMES COM G01767105 25,337 200 0.80 1 0.0060
2023-08-11 2023-06-30 13F ALKERMES COM G01767105 25,137 2,093 9.08 1 0.0064
2023-05-02 2023-03-31 13F ALKERMES COM G01767105 23,044 -3,825 -14.24 1 0.0055
2023-02-10 2022-12-31 13F ALKERMES COM G01767105 26,869 629 2.40 1 -100.00 0.0063
2022-11-09 2022-09-30 13F ALKERMES COM G01767105 26,240 121 0.46 586 -24.68 0.0057
2022-08-15 2022-06-30 13F ALKERMES COM G01767105 26,119 -140 -0.53 778 12.59 0.0073
2022-08-25 2022-03-31 13F/A-1 ALKERMES COM G01767105 26,259 -1,972 -6.99 691 5.18 0.0054
2022-06-30 2022-03-31 13F ALKERMES COM G01767105 26,259 -1,972 691 0.0055
2022-02-15 2021-12-31 13F/A-1 ALKERMES COM G01767105 28,231 -305 -1.07 657 -25.34 0.0048
2022-02-15 2021-12-31 13F ALKERMES COM G01767105 28,231 -305 657 0.0048
2021-10-29 2021-09-30 13F ALKERMES COM G01767105 28,536 -1,758 -5.80 880 18.44 0.0074
2021-08-16 2021-06-30 13F ALKERMES COM G01767105 30,294 11,963 65.26 743 117.25 0.0060
2021-05-13 2021-03-31 13F ALKERMES COM G01767105 18,331 -1,297 -6.61 342 -12.76 0.0128
2021-02-12 2020-12-31 13F ALKERMES COM G01767105 19,628 -58 -0.29 392 20.25 0.0149
2020-10-30 2020-09-30 13F ALKERMES COM G01767105 19,686 55 0.28 326 -14.44 0.0142
2020-08-10 2020-06-30 13F ALKERMES COM G01767105 19,631 -13,814 -41.30 381 -20.95 0.0176
2020-05-13 2020-03-31 13F ALKERMES COM G01767105 33,445 -356 -1.05 482 -30.14 0.0118
2020-02-13 2019-12-31 13F ALKERMES COM G01767105 33,801 2,991 9.71 690 14.81 0.0127
2019-11-13 2019-09-30 13F ALKERMES COM G01767105 30,810 -447 -1.43 601 -14.75 0.0126
2019-08-14 2019-06-30 13F ALKERMES COM G01767105 31,257 -3,728 -10.66 705 -44.79 0.0165
2019-05-15 2019-03-31 13F ALKERMES COM G01767105 34,985 641 1.87 1,277 26.06 0.0309
2019-02-15 2018-12-31 13F ALKERMES COM G01767105 34,344 13,277 63.02 1,013 13.31 0.0287
2018-11-14 2018-09-30 13F ALKERMES COM G01767105 21,067 -14,881 -41.40 894 -39.59 0.0221
2018-07-18 2018-06-30 13F ALKERMES COM G01767105 35,948 3,416 10.50 1,480 -21.53 0.0362
2018-05-22 2018-03-31 13F ALKERMES COM G01767105 32,532 2,073 6.81 1,886 13.14 0.0500
2018-02-13 2017-12-31 13F ALKERMES COM G01767105 30,459 1,634 5.67 1,667 13.79 0.0451
2017-11-09 2017-09-30 13F ALKERMES COM G01767105 28,825 120 0.42 1,465 -11.96 0.0456
2017-08-10 2017-06-30 13F ALKERMES COM G01767105 28,705 6,743 30.70 1,664 29.49 0.0545
2017-05-12 2017-03-31 13F ALKERMES COM G01767105 21,962 -4,841 -18.06 1,285 -13.76 0.0640
2017-02-14 2016-12-31 13F ALKERMES COM G01767105 26,803 2,782 11.58 1,490 31.86 0.0673
2016-11-15 2016-09-30 13F/A-1 ALKERMES COM G01767105 24,021 2 0.01 1,130 0.53 0.0656
2016-08-16 2016-06-30 13F ALKERMES COM G01767105 24,019 6,483 36.97 1,124 87.33 0.0650
2016-05-11 2016-03-31 13F ALKERMES COM G01767105 17,536 1,410 8.74 600 -53.12 0.0585
2016-02-10 2015-12-31 13F ALKERMES COM G01767105 16,126 -1,159 -6.71 1,280 26.23 0.1579
2015-11-04 2015-09-30 13F ALKERMES COM G01767105 17,285 243 1.43 1,014 -7.48 0.1064
2015-07-10 2015-06-30 13F ALKERMES COM G01767105 17,042 2,513 17.30 1,096 23.70 0.1076
2015-04-22 2015-03-31 13F ALKERMES COM G01767105 14,529 14,529 0.00 886 0.1082
2015-01-29 2014-12-31 13F ALKERMES PLC BEF COM G01767105 0 -13,932 -100.00 0 -100.00
2014-11-14 2014-09-30 13F ALKERMES PLC BEF COM G01767105 13,932 175 1.27 597 -13.73 0.0888
2014-08-11 2014-06-30 13F ALKERMES PLC BEF COM G01767105 13,757 -1,508 -9.88 692 2.82 0.1044
2014-05-12 2014-03-31 13F ALKERMES PLC BEF COM COM G01767105 15,265 898 6.25 673 15.24 0.1160
2014-02-13 2013-12-31 13F ALKERMES PLC BEF COM COM G01767105 14,367 3,296 29.77 584 56.99 0.0993
2013-11-14 2013-09-30 13F ALKERMES PLC BEF COM COM G01767105 11,071 11,071 372 0.1195
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.