Westlake (WLK) Stock Chart & Stock Price History $87.95 +1.54 (+1.78%) Closing price 08/29/2025 03:59 PM EasternExtended Trading$88.26 +0.31 (+0.35%) As of 08/29/2025 06:05 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 Chart Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Westlake Stock Price Performance The Westlake (WLK) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 39.52%, with a year-to-date return of -23.29%. In the past month, the stock has increased 10.43%, reflecting recent market activity. As of the latest close, Westlake traded at $87.95 with a market cap of $11.28 billion and volume of 907,528 shares. Five years ago, the stock traded at $61.18, representing a 43.75% increase over that period. At the time, it had a market cap of $7.70 billion and a volume of 295,370 shares. Receive WLK Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Westlake and its competitors with MarketBeat's FREE daily newsletter. Subscribe Now View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. 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Read our full terms of service and privacy policy. 5 Day Performance+0.61%1 Month Performance+10.43%3 Month Performance+23.90%Year-To-Date Performance-23.29%1 Year Performance-39.52%5 Year Performance+43.75% WLK Stock Chart for Saturday, August, 30, 2025 WLK Chart by TradingView Westlake Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization08/29/2025$86.44$87.95+1.74%$88.15$86.48907,528 shs$11.28 billion08/28/2025$86.16$86.44+0.33%$87.08$85.171.10 million shs$11.09 billion08/27/2025$86.29$86.16-0.16%$87.52$85.27882,462 shs$11.05 billion08/26/2025$87.41$86.29-1.28%$87.77$85.831.32 million shs$11.07 billion08/25/2025$90.46$87.41-3.37%$90.08$86.971.23 million shs$11.21 billion08/22/2025$82.74$90.46+9.32%$91.23$83.402.31 million shs$11.60 billion08/21/2025$82.83$82.74-0.11%$83.23$80.84688,225 shs$10.61 billion08/20/2025$83.54$82.83-0.85%$86.08$82.741.12 million shs$10.62 billion08/19/2025$83.45$83.54+0.11%$84.21$82.591.01 million shs$10.71 billion08/18/2025$84.05$83.45-0.72%$84.08$82.231.10 million shs$10.70 billion Get the Latest News and Ratings for WLK and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Westlake and its competitors with MarketBeat's FREE daily newsletter. 08/15/2025$85.70$84.05-1.92%$86.82$83.831.00 million shs$10.78 billion08/14/2025$84.99$85.70+0.83%$85.93$82.402.10 million shs$10.99 billion08/13/2025$79.05$84.99+7.52%$85.07$79.411.29 million shs$10.90 billion08/12/2025$76.96$79.05+2.71%$79.20$76.341.30 million shs$10.14 billion08/11/2025$79.06$76.96-2.66%$80.07$76.21997,544 shs$9.87 billion08/08/2025$82.05$79.06-3.64%$82.60$78.871.23 million shs$10.14 billion08/07/2025$81.34$82.05+0.87%$84.09$81.691.07 million shs$10.52 billion08/06/2025$83.04$81.34-2.04%$84.36$80.661.30 million shs$10.43 billion08/05/2025$76.27$83.04+8.88%$85.12$80.732.59 million shs$10.65 billion08/04/2025$75.42$76.27+1.13%$77.41$75.821.83 million shs$9.78 billion08/01/2025$79.22$75.42-4.80%$78.50$75.071.59 million shs$9.67 billion07/31/2025$79.64$79.22-0.53%$79.43$77.501.42 million shs$10.16 billion07/30/2025$85.24$79.64-6.57%$84.54$78.991.64 million shs$10.21 billion07/29/2025$85.83$85.24-0.69%$86.26$84.231.73 million shs$10.93 billion Related Companies AdvanSix Stock Price Chart Cabot Stock Price Chart Celanese Stock Price Chart DOW Stock Price Chart Eastman Chemical Stock Price Chart Huntsman Stock Price Chart LyondellBasell Industries Stock Price Chart Olin Stock Price Chart Hawkins Stock Price Chart Kronos Worldwide Stock Price Chart Receive WLK Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Westlake and its competitors with MarketBeat's FREE daily newsletter. 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