REGN Open Interest
Regeneron Pharmaceuticals Inc (REGN) had 40.71K open option contracts as of Nov 4, 2026: 20.78K calls and 19.93K puts. Open interest rose 13.2% over the past four weeks, and is REGN's highest level in 8 weeks. The put/call open interest ratio is 0.96, so calls and puts are about even.
Open Interest by Strike
Showing results for REGN, 2026-11-06(w), calls & puts
Open Interest Stats
Showing results for REGN, 2026-11-06(w), calls & puts
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Highest Open Interest Options
Showing results for REGN, 2026-11-06(w), calls & puts
Open Interest Total by Expiry
Showing results for REGN, 2026-11-06(w), calls & puts. View all expiries
Open Interest History
Showing daily totals for REGN, all expirations, calls & puts. View full history
REGN 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 REGN have?
Regeneron Pharmaceuticals had 40.71K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 36.62K contracts.
Is REGN open interest rising or falling?
Open interest rose 13.2% over the past four weeks, and is REGN's highest level in 8 weeks. It was 35.97K contracts on Oct 7, 2026. See the REGN open interest history for a longer view.
What is the REGN put/call open interest ratio?
The Regeneron Pharmaceuticals put/call open interest ratio was 0.96 as of Nov 4, 2026. Four weeks earlier it was 0.83.
What is Regeneron Pharmaceuticals Inc?
Regeneron Pharmaceuticals discovers, develops, and commercializes products that fight eye disease, cardiovascular disease, cancer, and inflammation.