Alkermes plc
US ˙ NasdaqGS ˙ IE00B56GVS15

SecurityALKS / Alkermes plc
InstitutionUBS Group AG
Latest Disclosed Ownership495,023 shares
Latest Disclosed Value $ 17,504,014
UBS Group AG ownership in ALKS / Alkermes plc

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 495,023 shares of Alkermes plc (US:ALKS) valued at $17,504,013 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 2,544,895 shares of Alkermes plc. This represents a change in shares of -80.55% during the quarter. The current value of the position is $21,167,183 USD.

UBS Group AG has a history of taking positions in derivatives of the underlying security (ALKS) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

ALKS / Alkermes plc Historical Put/Call Ratio
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)
2026-05-05 2026-03-31 13F ALKERMES SHS G01767105 495,023 -2,049,872 -80.55 17,504 -75.42 0.0005
2026-01-29 2025-12-31 13F ALKERMES SHS G01767105 2,544,895 1,790,729 237.44 71,206 214.74 0.0115
2025-11-13 2025-09-30 13F ALKERMES SHS G01767105 754,166 -588,236 -43.82 22,625 -41.09 0.0035
2025-08-14 2025-06-30 13F ALKERMES SHS G01767105 1,342,402 -1,700,807 -55.89 38,406 -61.78 0.0066
2025-05-13 2025-03-31 13F ALKERMES SHS G01767105 3,043,209 2,723,284 851.23 100,487 992.12 0.0185
2025-02-14 2024-12-31 13F ALKERMES SHS G01767105 319,925 -187,494 -36.95 9,201 -35.21 0.0017
2024-11-14 2024-09-30 13F ALKERMES SHS G01767105 507,419 40,633 8.70 14,203 26.25 0.0031
2024-08-14 2024-06-30 13F ALKERMES SHS G01767105 466,786 54,121 13.11 11,250 0.71 0.0028
2024-05-13 2024-03-31 13F ALKERMES SHS G01767105 412,665 140,908 51.85 11,171 48.18 0.0028
2024-02-09 2023-12-31 13F ALKERMES SHS G01767105 271,757 137,691 102.70 7,539 100.75 0.0023
2023-11-09 2023-09-30 13F ALKERMES SHS G01767105 134,066 112,803 530.51 3,755 464.66 0.0013
2023-08-11 2023-06-30 13F ALKERMES SHS G01767105 21,263 -1,294 -5.74 666 4.72 0.0002
2023-05-12 2023-03-31 13F ALKERMES SHS G01767105 22,557 2,643 13.27 636 22.12 0.0002
2023-02-08 2022-12-31 13F ALKERMES SHS G01767105 19,914 15 0.08 520 17.12 0.0002
2022-11-10 2022-09-30 13F ALKERMES SHS G01767105 19,899 -8,273 -29.37 444 -47.08 0.0002
2022-08-10 2022-06-30 13F ALKERMES SHS G01767105 28,172 -8,691 -23.58 839 -13.51 0.0003
2022-05-16 2022-03-31 13F ALKERMES SHS G01767105 36,863 6,654 22.03 970 38.18 0.0003
2022-02-14 2021-12-31 13F ALKERMES SHS G01767105 30,209 9,404 45.20 702 9.35 0.0002
2021-11-15 2021-09-30 13F ALKERMES SHS G01767105 20,805 -261,401 -92.63 642 -90.72 0.0002
2021-08-13 2021-06-30 13F ALKERMES SHS G01767105 282,206 -1,514,727 -84.30 6,920 -79.38 0.0022
2021-05-12 2021-03-31 13F ALKERMES SHS G01767105 1,796,933 -1,126,379 -38.53 33,567 -42.44 0.0111
2021-02-11 2020-12-31 13F ALKERMES SHS G01767105 2,923,312 1,705,003 139.95 58,320 188.90 0.0197
2020-11-12 2020-09-30 13F ALKERMES SHS G01767105 1,218,309 -742,577 -37.87 20,187 -46.95 0.0076
2020-07-31 2020-06-30 13F ALKERMES SHS G01767105 1,960,886 1,579,622 414.31 38,051 592.09 0.0161
2020-05-01 2020-03-31 13F ALKERMES SHS G01767105 381,264 324,621 573.10 5,498 375.61 0.0026
2020-02-14 2019-12-31 13F ALKERMES SHS G01767105 56,643 -328,832 -85.31 1,156 -84.63 0.0004
2019-11-14 2019-09-30 13F ALKERMES SHS G01767105 385,475 206,563 115.46 7,520 86.46 0.0029
2019-08-14 2019-06-30 13F ALKERMES SHS G01767105 178,912 85,931 92.42 4,033 18.86 0.0016
2019-05-14 2019-03-31 13F ALKERMES SHS G01767105 92,981 -66,206 -41.59 3,393 -27.76 0.0014
2019-02-14 2018-12-31 13F ALKERMES SHS G01767105 159,187 18,093 12.82 4,697 -21.55 0.0021
2018-11-14 2018-09-30 13F ALKERMES SHS G01767105 141,094 25,121 21.66 5,987 25.41 0.0024
2018-08-14 2018-06-30 13F ALKERMES SHS G01767105 115,973 -65,952 -36.25 4,774 -54.73 0.0021
2018-05-15 2018-03-31 13F ALKERMES SHS G01767105 181,925 70,156 62.77 10,545 72.39 0.0046
2018-02-14 2017-12-31 13F ALKERMES SHS G01767105 111,769 4,871 4.56 6,117 12.55 0.0025
2017-11-14 2017-09-30 13F ALKERMES SHS G01767105 106,898 -42,748 -28.57 5,435 -37.35 0.0025
2017-11-14 2017-06-30 13F/A-1 ALKERMES SHS G01767105 149,646 53,201 55.16 8,675 53.76 0.0045
2017-08-14 2017-06-30 13F ALKERMES SHS G01767105 149,646 53,201 8,675
2017-11-14 2017-03-31 13F/A-1 ALKERMES SHS G01767105 96,445 -10,235 -9.59 5,642 -4.86 0.0031
2017-05-12 2017-03-31 13F ALKERMES SHS G01767105 96,445 -10,235 5,642
2017-02-14 2016-12-31 13F ALKERMES SHS G01767105 106,680 -53,936 -33.58 5,930 -21.49 0.0033
2016-11-14 2016-09-30 13F ALKERMES SHS G01767105 160,616 75,559 88.83 7,553 105.52 0.0045
2016-08-12 2016-06-30 13F ALKERMES SHS G01767105 85,057 -3,627 -4.09 3,675 21.17 0.0023
2016-05-12 2016-03-31 13F ALKERMES SHS G01767105 88,684 -15,963 -15.25 3,033 -63.49 0.0020
2016-02-16 2015-12-31 13F ALKERMES SHS G01767105 104,647 2,681 2.63 8,307 38.89 0.0054
2015-11-13 2015-09-30 13F ALKERMES SHS G01767105 101,966 20,009 24.41 5,981 13.43 0.0042
2015-08-14 2015-06-30 13F ALKERMES SHS G01767105 81,957 -26,369 -24.34 5,273 -20.15 0.0035
2015-05-14 2015-03-31 13F ALKERMES SHS G01767105 108,326 31,452 40.91 6,604 46.69 0.0046
2015-02-17 2014-12-31 13F ALKERMES SHS G01767105 76,874 76,874 4,502 0.0031
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-02-09 2023-12-31 13F ALKERMES SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-09 2023-09-30 13F ALKERMES SHS Call 272,900 0.00 7,644 -10.51 n/a n/a n/a
2023-08-11 2023-06-30 13F ALKERMES SHS Call 272,900 0.00 8,542 11.02 n/a n/a n/a
2023-05-12 2023-03-31 13F ALKERMES SHS Call 272,900 0.00 7,693 7.90 n/a n/a n/a
2023-02-08 2022-12-31 13F ALKERMES SHS Call 272,900 7,131 n/a n/a n/a
2018-08-14 2018-06-30 13F ALKERMES SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2018-05-15 2018-03-31 13F ALKERMES SHS Call 25,000 1,449 n/a n/a n/a
2016-08-12 2016-06-30 13F ALKERMES SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-05-12 2016-03-31 13F ALKERMES SHS Call 80,000 2,735 n/a n/a n/a
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.