ALKS Open Interest
Alkermes Inc plc (ALKS) had 19.15K open option contracts as of Nov 4, 2026: 10.24K calls and 8.91K puts. Open interest fell 9.6% over the past four weeks. The put/call open interest ratio is 0.87, so calls outnumber puts.
Open Interest by Strike
Showing results for ALKS, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for ALKS, 2026-11-20(m), calls & puts
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Highest Open Interest Options
Showing results for ALKS, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for ALKS, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for ALKS, all expirations, calls & puts. View full history
ALKS Open Interest FAQ
What is open interest?
Open interest is the number of option contracts that are open and not yet closed, exercised, or expired. The Options Clearing Corporation calculates it once a day from the previous day's trades, and it is published before the market opens.
How much open interest does ALKS have?
Alkermes had 19.15K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 19.82K contracts.
Is ALKS open interest rising or falling?
Open interest fell 9.6% over the past four weeks. It was 21.18K contracts on Oct 7, 2026. See the ALKS open interest history for a longer view.
What is the ALKS put/call open interest ratio?
The Alkermes put/call open interest ratio was 0.87 as of Nov 4, 2026. Four weeks earlier it was 0.85.
What is Alkermes Inc plc?
Alkermes PLC is a fully integrated biotechnology company that applies its proprietary technologies to research, develop, and commercialize pharmaceutical products designed for unmet medical needs in therapeutic areas.