Westlake (WLK) closed at $66.17 on October 27, 2026, up 1.3% from the previous close, on volume of 868,264 shares (30-day average 863,998).
Data as of October 27, 2026.
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Westlake is a forward-integrated commodity chemicals firm based in Houston. It began as a single low-density polyethylene plant and expanded its capabilities to include ethylene, vinyl chloride monomers, and polyvinyl chloride over the next two decades. The acquisition of Axiall in 2016 made it a North American leader in chlor-alkali and PVC. Today, Westlake has two defined segments: performance and essential materials, and housing and infrastructure products. The HIP segment began operating in 2022 following a series of acquisitions in the building products space. The firm aims to maximize the value of its chemical production by integrating with the HIP segment, realizing the higher margins of finished commercial goods.
Westlake trades on the NYSE stock market under the symbol WLK.
As of October 28, 2026, WLK stock price climbed to $66.33 with 106,060 million shares trading.
WLK has a beta of 0.16, meaning it tends to be less sensitive to market movements. WLK has a correlation of 0.00 to the broad based SPY ETF.
WLK has a market cap of $8.52 billion. This is considered a Mid Cap stock.
Last quarter Westlake reported $3 billion in Revenue and $2.01 earnings per share. This beat revenue expectation by $5 million and exceeded earnings estimates by $.10.
In the last 3 years, WLK traded as high as $162.64 and as low as $56.33.
The top ETF exchange traded funds that WLK belongs to (by Net Assets): IJH, PAVE, VTI, DFSV, DFAT.
WLK has underperformed the market in the last year with a return of -14.1%, while the SPY ETF gained +13.7%. In the last 3 month period, WLK fell short of the market, returning -7.6%, while SPY returned +4.6%. However, in the most recent 2 weeks WLK has outperformed the stock market by returning +7.2%, while SPY returned -0.8%.
WLK support price is $64.45 and resistance is $67.89 (based on 1 day standard deviation move). This means that using the most recent 20 day stock volatility and applying a one standard deviation move around the stock's closing price, stastically there is a 67% probability that WLK shares will trade within this expected range on the day.