Alkermes plc
US ˙ NasdaqGS ˙ IE00B56GVS15

SecurityALKS / Alkermes plc
InstitutionCapital Fund Management S.a.
Latest Disclosed Ownership243,043 shares
Latest Disclosed Value $ 8,594,000
Capital Fund Management S.a. ownership in ALKS / Alkermes plc

On May 14, 2026 - Capital Fund Management S.a. filed a 13F-HR form disclosing ownership of 243,043 shares of Alkermes plc (US:ALKS) valued at $8,594,000 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 150,775 shares of Alkermes plc. This represents a change in shares of 61.20% during the quarter. The current value of the position is $10,392,519 USD.

Capital Fund Management S.a. 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 and put 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.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

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)
2026-05-14 2026-03-31 13F ALKERMES PLC SHS ALKERMES PLC SHS G01767105 243,043 92,268 61.20 8,594 103.75 0.0388
2026-02-17 2025-12-31 13F ALKERMES PLC SHS ALKERMES PLC SHS G01767105 150,775 29,816 24.65 4,219 16.26 0.0117
2025-11-13 2025-09-30 13F ALKERMES SHS G01767105 120,959 81,030 202.94 3,629 217.69 0.0095
2025-08-13 2025-06-30 13F ALKERMES SHS G01767105 39,929 39,929 1,142 0.0031
2025-05-14 2025-03-31 13F ALKERMES SHS G01767105 0 -163,581 -100.00 0 -100.00
2025-02-13 2024-12-31 13F ALKERMES SHS G01767105 163,581 -115,471 -41.38 4,705 -39.77 0.0120
2024-11-13 2024-09-30 13F ALKERMES SHS G01767105 279,052 21,095 8.18 7,811 25.64 0.0214
2024-08-13 2024-06-30 13F ALKERMES SHS G01767105 257,957 113,660 78.77 6,217 59.14 0.0183
2024-05-15 2024-03-31 13F ALKERMES SHS G01767105 144,297 120,816 514.53 3,906 500.00 0.0113
2024-02-14 2023-12-31 13F ALKERMES SHS G01767105 23,481 -118,176 -83.42 651 -83.59 0.0018
2023-11-14 2023-09-30 13F ALKERMES SHS G01767105 141,657 -23,924 -14.45 3,968 -23.45 0.0137
2023-08-14 2023-06-30 13F ALKERMES SHS G01767105 165,581 -75,467 -31.31 5,183 -23.74 0.0210
2023-05-15 2023-03-31 13F ALKERMES SHS G01767105 241,048 -134,708 -35.85 6,795 -30.79 0.0325
2023-02-13 2022-12-31 13F ALKERMES SHS G01767105 375,756 108,103 40.39 9,819 64.29 0.0659
2022-11-14 2022-09-30 13F ALKERMES SHS G01767105 267,653 92,495 52.81 5,977 14.55 0.0470
2022-08-12 2022-06-30 13F ALKERMES SHS G01767105 175,158 104,956 149.51 5,218 182.46 0.0475
2022-05-12 2022-03-31 13F ALKERMES SHS G01767105 70,202 70,202 1,847 0.0151
2021-02-12 2020-12-31 13F ALKERMES SHS G01767105 0 -18,219 -100.00 0 -100.00
2020-11-13 2020-09-30 13F ALKERMES SHS G01767105 18,219 -18,438 -50.30 302 -57.67 0.0037
2020-08-13 2020-06-30 13F ALKERMES SHS G01767105 36,657 4,389 13.60 711 52.90 0.0113
2020-05-13 2020-03-31 13F Alkermes SHS G01767105 32,268 -16,232 -33.47 465 -52.98 0.0072
2020-02-13 2019-12-31 13F Alkermes SHS G01767105 48,500 48,500 989 0.0078
2019-11-13 2019-09-30 13F Alkermes SHS G01767105 0 -76,233 -100.00 0 -100.00
2019-08-12 2019-06-30 13F Alkermes SHS G01767105 76,233 -97,400 -56.10 1,718 -72.89 0.0156
2019-05-13 2019-03-31 13F/A-1 Alkermes SHS G01767105 173,633 -8,300 -4.56 6,336 18.01 0.0567
2019-05-13 2019-03-31 13F Alkermes SHS G01767105 181,933 0 5,369
2019-02-13 2018-12-31 13F Alkermes SHS G01767105 181,933 -46,300 -20.29 5,369 -44.57 0.0475
2018-11-14 2018-09-30 13F Alkermes SHS G01767105 228,233 127,195 125.89 9,686 132.89 0.0528
2018-08-14 2018-06-30 13F Alkermes SHS G01767105 101,038 101,038 4,159 0.0217
2018-05-15 2018-03-31 13F Alkermes SHS G01767105 0 -47,409 -100.00 0 -100.00
2018-02-09 2017-12-31 13F Alkermes SHS G01767105 47,409 -41,700 -46.80 2,595 -42.72 0.0143
2017-11-13 2017-09-30 13F Alkermes SHS G01767105 89,109 89,109 4,530 0.0326
2017-08-10 2017-06-30 13F Alkermes SHS G01767105 0 -5,118 -100.00 0 -100.00
2017-05-03 2017-03-31 13F Alkermes SHS G01767105 5,118 -118,170 -95.85 299 -95.64 0.0025
2017-02-08 2016-12-31 13F Alkermes SHS G01767105 123,288 -75,474 -37.97 6,852 -26.70 0.0590
2016-10-31 2016-09-30 13F Alkermes SHS G01767105 198,762 42,356 27.08 9,348 38.28 0.0858
2016-07-27 2016-06-30 13F Alkermes SHS G01767105 156,406 -393,300 -71.55 6,760 -64.03 0.0633
2016-05-02 2016-03-31 13F Alkermes SHS G01767105 549,706 549,706 0.00 18,794 0.1825
2016-01-28 2015-12-31 13F Alkermes SHS G01767105 0 -28,876 -100.00 0 -100.00
2015-10-27 2015-09-30 13F Alkermes SHS G01767105 28,876 24,179 514.78 1,694 460.93 0.0189
2015-07-28 2015-06-30 13F Alkermes SHS G01767105 4,697 -5,130 -52.20 302 -49.58 0.0038
2015-04-28 2015-03-31 13F Alkermes SHS G01767105 9,827 -3,153 -24.29 599 4.72 0.0082
2014-05-14 2014-03-31 13F Alkermes SHS G01767105 12,980 -13,546 -51.07 572 -46.99 0.0070
2014-01-31 2013-12-31 13F Alkermes SHS G01767105 26,526 -50,022 -65.35 1,079 -58.08 0.0133
2013-10-31 2013-09-30 13F Alkermes SHS G01767105 76,548 -89,294 -53.84 2,574 -45.88 0.0356
2013-07-31 2013-06-30 13F Alkermes SHS G01767105 165,842 165,842 4,756 0.0726
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
(%)
2016-07-27 2016-06-30 13F Alkermes SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-05-02 2016-03-31 13F Alkermes SHS Call 22,100 20.77 756 22.93 n/a n/a n/a
2014-01-31 2013-12-31 13F Alkermes SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2013-10-31 2013-09-30 13F Alkermes SHS Call 18,300 -48.88 615 -40.12 n/a n/a n/a
2013-07-31 2013-06-30 13F Alkermes SHS Call 35,800 1,027 n/a n/a n/a
Disclosed Put 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
(%)
2022-02-10 2021-12-31 13F ALKERMES SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-12 2021-09-30 13F ALKERMES SHS Put 12,600 389 n/a n/a n/a
2016-07-27 2016-06-30 13F Alkermes SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2016-05-02 2016-03-31 13F Alkermes SHS Put 7,800 -12.36 267 -10.70 n/a n/a n/a
2014-01-31 2013-12-31 13F Alkermes SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2013-10-31 2013-09-30 13F Alkermes SHS Put 8,900 -93.30 299 -92.15 n/a n/a n/a
2013-07-31 2013-06-30 13F Alkermes SHS Put 132,800 3,809 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.