Westlake (WLK) Stock Chart & Stock Price History $76.31 -3.63 (-4.54%) As of 03:58 PM Eastern 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 52.38%, with a year-to-date return of -33.44%. In the past month, the stock has decreased 16.92%, reflecting recent market activity. As of the latest close, Westlake traded at $79.95 with a market cap of $10.25 billion and volume of 2.36 million shares. Five years ago, the stock traded at $42.02, representing a 81.60% increase over that period. At the time, it had a market cap of $5.69 billion and a volume of 395,300 shares. 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Email Address 5 Day Performance-7.82%1 Month Performance-16.92%3 Month Performance-31.37%Year-To-Date Performance-33.44%1 Year Performance-52.38%5 Year Performance+81.60% WLK Stock Chart for Tuesday, May, 20, 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 Capitalization05/20/2025$79.95$76.31-4.55%$78.94$76.171.86 million shs$9.79 billion05/19/2025$81.87$79.95-2.34%$80.43$78.162.36 million shs$10.25 billion05/16/2025$82.78$81.87-1.10%$83.96$81.251.57 million shs$10.50 billion05/15/2025$82.61$82.78+0.21%$83.41$80.001.25 million shs$10.62 billion05/14/2025$86.37$82.61-4.35%$85.73$82.181.42 million shs$10.59 billion05/13/2025$85.62$86.37+0.87%$87.31$85.331.04 million shs$11.08 billion05/12/2025$80.05$85.62+6.96%$87.32$83.161.22 million shs$10.98 billion05/09/2025$80.42$80.05-0.46%$81.90$79.48867,336 shs$10.29 billion05/08/2025$78.01$80.42+3.09%$81.55$78.56958,169 shs$10.33 billion05/07/2025$78.91$78.01-1.14%$79.02$76.971.51 million shs$10.02 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. 05/06/2025$78.37$78.91+0.69%$79.21$77.231.68 million shs$10.14 billion05/05/2025$80.12$78.37-2.19%$81.24$78.181.85 million shs$10.07 billion05/02/2025$91.97$80.12-12.89%$84.50$78.512.72 million shs$10.29 billion05/01/2025$92.43$91.97-0.49%$94.18$91.51869,874 shs$11.82 billion04/30/2025$93.42$92.43-1.06%$92.55$89.96691,426 shs$11.88 billion04/29/2025$93.19$93.42+0.24%$93.75$91.76427,603 shs$12.00 billion04/28/2025$93.38$93.19-0.20%$94.21$91.99668,304 shs$11.97 billion04/25/2025$94.80$93.38-1.50%$93.84$91.71598,194 shs$12.00 billion04/24/2025$92.42$94.80+2.58%$95.61$91.65581,737 shs$12.18 billion04/23/2025$93.49$92.42-1.14%$98.50$91.85621,411 shs$11.87 billion04/22/2025$90.81$93.49+2.95%$93.77$91.22428,619 shs$12.01 billion04/21/2025$91.86$90.81-1.14%$92.11$89.60389,090 shs$11.67 billion Related Companies LyondellBasell Industries Stock Price Chart Cabot Stock Price Chart Hawkins Stock Price Chart Kronos Worldwide Stock Price Chart Koppers Stock Price Chart Tredegar Stock Price Chart International Flavors & Fragrances Stock Price Chart NewMarket Stock Price Chart Sensient Technologies Stock Price Chart Methanex 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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