IONS Open Interest
Ionis Pharmaceuticals Inc (IONS) had 52.68K open option contracts as of Nov 4, 2026: 33.23K calls and 19.45K puts. Open interest fell 20.8% over the past four weeks. The put/call open interest ratio is 0.59, so calls outnumber puts.
Open Interest by Strike
Showing results for IONS, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for IONS, 2026-11-20(m), calls & puts
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Highest Open Interest Options
Showing results for IONS, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for IONS, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for IONS, all expirations, calls & puts. View full history
IONS 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 IONS have?
Ionis Pharmaceuticals had 52.68K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 56.53K contracts.
Is IONS open interest rising or falling?
Open interest fell 20.8% over the past four weeks. It was 66.55K contracts on Oct 7, 2026. See the IONS open interest history for a longer view.
What is the IONS put/call open interest ratio?
The Ionis Pharmaceuticals put/call open interest ratio was 0.59 as of Nov 4, 2026. Four weeks earlier it was 0.69.
What is Ionis Pharmaceuticals Inc?
Ionis Pharmaceuticals is the leading developer of antisense technology to discover and develop novel drugs.