Alkermes
ALKS · NASDAQ
$44.11+$1.14 (+2.65%)TodayMarket closed ·
Prev close $42.97
Who owns ALKS
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 51.8% of ALKS’s shares.
- BlackRock Institutional Trust Company, N.A.14.9%
- Baker Bros. Advisors LP6.0%
- Vanguard Portfolio Management, LLC5.7%
- State Street Investment Management (US)5.5%
- Next 6 largest institutions19.8%
- All other shareholders48.2%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 25.06M | 14.94% |
| Baker Bros. Advisors LP | 10.01M | 5.97% |
| Vanguard Portfolio Management, LLC | 9.49M | 5.66% |
| State Street Investment Management (US) | 9.16M | 5.46% |
| Vanguard Capital Management, LLC | 7.52M | 4.48% |
| T. Rowe Price Associates, Inc. | 6.48M | 3.87% |
| Renaissance Technologies LLC | 6.46M | 3.85% |
| Geode Capital Management, L.L.C. | 4.48M | 2.67% |
| Dimensional Fund Advisors, L.P. | 4.19M | 2.50% |
| Deep Track Capital LP | 4.00M | 2.38% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Small-Cap ETF | 10.16M | 6.05% |
| Vanguard Total Stock Market Index Fund | 5.32M | 3.17% |
| iShares Russell 2000 ETF | 4.32M | 2.57% |
| Vanguard Small-Cap Index Fund | 3.83M | 2.28% |
| State Street SPDR S&P Biotech ETF | 2.39M | 1.43% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $5.93M (17 trades) of ALKS on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Reed Joshua | Option exercise | 9.16K | — |
| Reed Joshua | Tax withholding | 4.07K | $163.21K |
| Reed Joshua | Option exercise | 9.16K | — |
| Whitaker Anne Clem | Award | 18.00K | — |
| Whitaker Anne Clem | Award | 7.24K | — |
| Gaffin David Joseph | Sale | 2.03K | $83.46K |
| Gaffin David Joseph | Sale | 2.03K | $97.65K |
| Hopkinson Craig C. | Option exercise | 5.00K | — |
| Hopkinson Craig C. | Sale | 9.00K | $422.87K |
| Hopkinson Craig C. | Option exercise | 5.00K | $122.95K |
Short interest
Settled Sep 30, 2026
- Shares short
- 17.82M
- Days to cover
- 6.28
- % of shares outstanding
- 10.62%
- Average daily volume
- 2.84M
- Change since last report
- +17.6%
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