MCK Open Interest
McKesson Corporation (MCK) had 23.16K open option contracts as of Nov 4, 2026: 12.8K calls and 10.36K puts. Open interest rose 31.1% over the past four weeks, and is MCK's highest level in 12 weeks. The put/call open interest ratio is 0.81, so calls outnumber puts.
Open Interest by Strike
Showing results for MCK, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for MCK, 2026-11-20(m), calls & puts
| Call Open Interest Total | |
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| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for MCK, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for MCK, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for MCK, all expirations, calls & puts. View full history
MCK 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 MCK have?
McKesson had 23.16K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 20.02K contracts.
Is MCK open interest rising or falling?
Open interest rose 31.1% over the past four weeks, and is MCK's highest level in 12 weeks. It was 17.66K contracts on Oct 7, 2026. See the MCK open interest history for a longer view.
What is the MCK put/call open interest ratio?
The McKesson put/call open interest ratio was 0.81 as of Nov 4, 2026. Four weeks earlier it was 0.78.
What is McKesson Corporation?
McKesson is one of three leading pharmaceutical wholesalers in the US engaged in sourcing and distributing branded, generic, and specialty pharmaceutical products to pharmacies (retail chains, independent, and mail order), hospitals networks, and healthcare providers.