WLK Open Interest
Westlake Corporation (WLK) had 4.69K open option contracts as of Nov 4, 2026: 3.44K calls and 1.24K puts. Open interest rose 16.6% over the past four weeks, and is WLK's highest level in 12 weeks. The put/call open interest ratio is 0.36, so calls outnumber puts.
Open Interest by Strike
Showing results for WLK, 2026-11-20(m), calls & puts
Open Interest Stats
Showing results for WLK, 2026-11-20(m), calls & puts
| Call Open Interest Total | |
|---|---|
| Put Open Interest Total | |
| Open Interest Total | |
| Put-Call Open Interest Ratio |
Highest Open Interest Options
Showing results for WLK, 2026-11-20(m), calls & puts
Open Interest Total by Expiry
Showing results for WLK, 2026-11-20(m), calls & puts. View all expiries
Open Interest History
Showing daily totals for WLK, all expirations, calls & puts. View full history
WLK 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 WLK have?
Westlake had 4.69K open option contracts as of Nov 4, 2026. Over the past 30 days, open interest averaged 3.96K contracts.
Is WLK open interest rising or falling?
Open interest rose 16.6% over the past four weeks, and is WLK's highest level in 12 weeks. It was 4.02K contracts on Oct 7, 2026. See the WLK open interest history for a longer view.
What is the WLK put/call open interest ratio?
The Westlake put/call open interest ratio was 0.36 as of Nov 4, 2026. Four weeks earlier it was 0.31.
What is Westlake Corporation?
Westlake is a forward-integrated commodity chemicals firm based in Houston.