Westlake (WLK) Stock Chart & Stock Price History $81.39 -0.34 (-0.42%) Closing price 03:59 PM EasternExtended Trading$81.16 -0.23 (-0.28%) As of 07:20 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 45.51%, with a year-to-date return of -29.01%. In the past month, the stock has increased 6.53%, reflecting recent market activity. As of the latest close, Westlake traded at $81.84 with a market cap of $10.50 billion and volume of 615,904 shares. Five years ago, the stock traded at $55.18, representing a 47.50% increase over that period. At the time, it had a market cap of $7.13 billion and a volume of 451,000 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. Email Address 5 Day Performance-4.83%1 Month Performance+6.53%3 Month Performance-9.90%Year-To-Date Performance-29.01%1 Year Performance-45.51%5 Year Performance+47.50% WLK Stock Chart for Wednesday, July, 16, 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 Capitalization07/15/2025$83.44$81.84-1.92%$85.00$81.65615,904 shs$10.50 billion07/14/2025$85.52$83.44-2.43%$85.08$82.90747,538 shs$10.70 billion07/11/2025$86.47$85.52-1.10%$85.78$83.71617,123 shs$10.97 billion07/10/2025$85.63$86.47+0.98%$88.42$85.121.06 million shs$11.09 billion07/09/2025$83.14$85.63+2.99%$85.84$83.401.75 million shs$10.98 billion07/08/2025$78.77$83.14+5.55%$83.93$79.311.14 million shs$10.66 billion07/07/2025$81.11$78.77-2.88%$81.24$77.701.07 million shs$10.10 billion07/04/2025$81.11$81.11$82.57$80.70707,564 shs$10.40 billion07/03/2025$81.75$81.11-0.78%$82.57$80.70707,564 shs$10.40 billion07/02/2025$80.41$81.75+1.67%$82.48$80.051.18 million shs$10.48 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. 07/01/2025$75.94$80.41+5.89%$81.98$75.391.97 million shs$10.31 billion06/30/2025$76.42$75.94-0.63%$76.22$74.811.21 million shs$9.74 billion06/27/2025$76.14$76.42+0.37%$77.70$75.781.42 million shs$9.80 billion06/26/2025$74.86$76.14+1.70%$76.17$74.54874,160 shs$9.76 billion06/25/2025$75.94$74.86-1.42%$75.57$74.071.11 million shs$9.60 billion06/24/2025$73.57$75.94+3.23%$76.71$73.721.29 million shs$9.74 billion06/23/2025$72.08$73.57+2.07%$73.65$71.031.69 million shs$9.43 billion06/20/2025$71.14$72.08+1.31%$72.71$70.131.91 million shs$9.24 billion06/19/2025$71.14$71.14$73.63$71.051.01 million shs$9.12 billion06/18/2025$73.30$71.14-2.94%$73.63$71.051.01 million shs$9.12 billion06/17/2025$76.40$73.30-4.05%$76.46$73.22907,951 shs$9.40 billion06/16/2025$77.25$76.40-1.10%$78.05$75.501.06 million shs$9.80 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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