Westlake Chemical Partners (WLKP) Stock Chart & Stock Price History $21.46 -0.12 (-0.56%) Closing price 09/18/2025 03:59 PM EasternExtended Trading$21.44 -0.02 (-0.07%) As of 09/18/2025 06:41 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 InterestTrendsBuy This Stock Westlake Chemical Partners Stock Price Performance The Westlake Chemical Partners (WLKP) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 4.45%, with a year-to-date return of -7.26%. In the past month, the stock has decreased 1.78%, reflecting recent market activity. As of the latest close, Westlake Chemical Partners traded at $21.46 with a market cap of $756.25 million and volume of 39,199 shares. Five years ago, the stock traded at $20.83, representing a 3.02% increase over that period. At the time, it had a market cap of $733.09 million and a volume of 37,264 shares. Receive WLKP Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Westlake Chemical Partners 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. 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Read our full terms of service and privacy policy. 5 Day Performance-1.42%1 Month Performance-1.78%3 Month Performance-2.72%Year-To-Date Performance-7.26%1 Year Performance-4.45%5 Year Performance+3.02% WLKP Stock Chart for Friday, September, 19, 2025 WLKP Chart by TradingView Westlake Chemical Partners 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 Capitalization09/18/2025$21.58$21.46-0.53%$21.66$21.3839,199 shs$756.25 million09/17/2025$21.57$21.58+0.02%$21.70$21.5028,025 shs$760.30 million09/16/2025$21.74$21.57-0.78%$21.90$21.5125,616 shs$760.13 million09/15/2025$21.77$21.74-0.14%$21.84$21.6529,140 shs$766.12 million09/12/2025$21.82$21.77-0.21%$21.94$21.5859,517 shs$767.18 million09/11/2025$21.80$21.82+0.09%$21.89$21.7536,307 shs$768.76 million09/10/2025$21.86$21.80-0.27%$21.99$21.7532,799 shs$768.06 million09/09/2025$21.95$21.86-0.41%$22.01$21.8150,948 shs$774.20 million09/08/2025$21.89$21.95+0.25%$22.00$21.7635,203 shs$773.34 million09/05/2025$21.85$21.89+0.21%$22.05$21.7620,455 shs$771.40 million Get the Latest News and Ratings for WLKP and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Westlake Chemical Partners and its competitors with MarketBeat's FREE daily newsletter. 09/04/2025$21.97$21.85-0.55%$22.01$21.7764,339 shs$769.82 million09/03/2025$22.08$21.97-0.52%$22.12$21.9226,973 shs$774.03 million09/02/2025$22.21$22.08-0.59%$22.22$22.0117,515 shs$778.10 million09/01/2025$22.21$22.21$22.30$22.0939,758 shs$782.68 million08/29/2025$22.22$22.21-0.02%$22.30$22.0939,758 shs$782.68 million08/28/2025$22.16$22.22+0.25%$22.41$22.1322,812 shs$782.83 million08/27/2025$22.36$22.16-0.89%$22.40$22.1045,356 shs$780.92 million08/26/2025$22.04$22.36+1.47%$22.40$21.9937,735 shs$787.97 million08/25/2025$22.16$22.04-0.54%$22.24$22.0025,753 shs$776.49 million08/22/2025$22.01$22.16+0.68%$22.25$22.0924,168 shs$780.72 million08/21/2025$22.10$22.01-0.41%$22.11$21.9619,989 shs$775.46 million08/20/2025$21.85$22.10+1.12%$22.15$21.7832,986 shs$778.63 million08/19/2025$21.92$21.85-0.32%$22.01$21.8223,574 shs$769.97 million08/18/2025$22.00$21.92-0.36%$22.10$21.8127,636 shs$772.46 million Related Companies Methanex Stock Price Chart PureCycle Technologies Stock Price Chart Chemours Stock Price Chart Ingevity Stock Price Chart CVR Partners Stock Price Chart Braskem Stock Price Chart Ecovyst Stock Price Chart ASP Isotopes Stock Price Chart Tronox Stock Price Chart Orion Stock Price Chart Receive WLKP Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Westlake Chemical Partners and its competitors with MarketBeat's FREE daily newsletter. 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