TransAlta (TAC) Options Chain & Prices $16.70 -0.16 (-0.92%) Closing price 03:59 PM EasternExtended Trading$16.44 -0.26 (-1.56%) As of 04:17 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 Polygon.io. Learn more. Add Compare Share Share Options Chain Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock TAC Put and Call Options List 11/20/2026 8/21/2026 6/18/2026 5/15/2026 3/20/2026 1/16/2026 12/19/2025 11/21/2025 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 to Excel ExpiresStrike PriceClose PricePut/CallVolumeVolume AskVolume BidOpen InterestImplied VolatilityDeltaTrades11/21/2025$14.00$0.382Put4824670(+1)75.71% (+1.30%)-0.171228811/21/2025$14.00$3.285Call172152568(+225)75.71% (+1.30%)0.829396311/21/2025$15.00$0.648Put521508122230(-1)74.61% (+1.46%)-0.2581272011/21/2025$15.00$2.554Call43 - 35123(-22)74.61% (+1.15%)0.742907911/21/2025$16.00$1.032Put1,094451,036217(+73)74.39% (+0.90%)-0.3599446611/21/2025$16.00$1.941Call212013421(+32)74.39% (-0.50%)0.641629511/21/2025$17.00$1.538Put2 - 255(+1)74.72% (+0.60%)-0.466261211/21/2025$17.00$1.448Call24107608(+3)74.72% (-5.93%)0.5359931111/21/2025$18.00$2.154Put2 - - 1(+0)75.37% (+0.31%)-0.567653111/21/2025$18.00$1.066Call433841333(+149)75.37% (+0.31%)0.435411211/21/2025$19.00$0.777Call555036042(+7)76.18% (+0.03%)0.345913811/21/2025$20.00$0.563Call442752161(+9)77.06% (-0.21%)0.27011714End-of-day options data provided by Trade Alert and Intrinio. 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