Westlake (WLK) Options Chain & Prices $70.77 -0.85 (-1.18%) Closing price 09/11/2026 03:58 PM EasternExtended Trading$70.80 +0.02 (+0.03%) As of 09/11/2026 07:30 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more. Add Compare Share Share Options Chain Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsInsider TradesNews and TrendsOptions ChainOwnershipSEC FilingsShort Interest WLK Put and Call Options List 4/16/2027 1/15/2027 12/18/2026 10/16/2026 9/18/2026 Options Date Put and Call Options Put Options Call Options Options Type All In The Money Out of The Money Moneyness With Volume Without Volume All Volume Strike Price Min Strike Price Max Export ExpiresStrike PriceClose PricePut/CallVolumeVolume AskVolume BidOpen InterestImplied VolatilityDeltaTrades9/18/2026$70.00$0.934Put2 - 26(+0)33.97% (-2.74%)-0.39017519/18/2026$75.00$0.336Call1 - 15(+0)40.34% (-3.91%)0.16592219/18/2026$80.00$0.131Call4 - - 122(+0)54.39% (-5.61%)0.0600511End-of-day options data provided by Trade Alert and Intrinio. 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