MKSI Open Interest
MKS Inc (MKSI) had 17.7K open option contracts as of Nov 4, 2026: 12.59K calls and 5.12K puts. Open interest fell 1.3% over the past four weeks. The put/call open interest ratio is 0.41, so calls outnumber puts.
Open Interest by Strike
Showing results for MKSI, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for MKSI, 2026-11-20(m), calls & puts
| Call Open Interest Total | |
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| Put Open Interest Total | |
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| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for MKSI, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for MKSI, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for MKSI, all expirations, calls & puts. View full history
MKSI 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 MKSI have?
MKS had 17.7K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 16.68K contracts.
Is MKSI open interest rising or falling?
Open interest fell 1.3% over the past four weeks. It was 17.93K contracts on Oct 7, 2026. See the MKSI open interest history for a longer view.
What is the MKSI put/call open interest ratio?
The MKS put/call open interest ratio was 0.41 as of Nov 4, 2026. Four weeks earlier it was 0.45.
What is MKS Inc?
MKS Inc delivers foundational technology solutions for leading edge semiconductor manufacturing, electronics and packaging, and specialty industrial applications.