CRL Open Interest
Charles River Laboratories International Inc (CRL) had 14.29K open option contracts as of Nov 4, 2026: 9.21K calls and 5.09K puts. Open interest rose 59.6% over the past four weeks, and is CRL's highest level in 12 weeks. The put/call open interest ratio is 0.55, so calls outnumber puts.
Open Interest by Strike
Showing results for CRL, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for CRL, 2026-11-20(m), calls & puts
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| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for CRL, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for CRL, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for CRL, all expirations, calls & puts. View full history
CRL 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 CRL have?
Charles River Laboratories International had 14.29K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 9.74K contracts.
Is CRL open interest rising or falling?
Open interest rose 59.6% over the past four weeks, and is CRL's highest level in 12 weeks. It was 8.95K contracts on Oct 7, 2026. See the CRL open interest history for a longer view.
What is the CRL put/call open interest ratio?
The Charles River Laboratories International put/call open interest ratio was 0.55 as of Nov 4, 2026. Four weeks earlier it was 0.44.
What is Charles River Laboratories International Inc?
Charles River Laboratories was founded in 1947 and is a leading provider of drug discovery and development services.