Westlake Corporation (WLK:NYSE) closed at $64.56 on October 23, 2026, up 0.65% on the day. The stock trades 48.0% below its 52-week high of $124.23 and 14.6% above its 52-week low of $56.33. Over the past year, it lost 18.5%. Westlake Corporation is part of the Basic Industries sector (Major Chemicals).
In 252 trading sessions since October 23, 2025, WLK closed higher on 116 days (46%). Its best day was August 4, 2026 (+15.37%) and its worst was May 5, 2026 (-8.78%). The stock moved 10% or more in a single session 2 times. It opened at least 5% above the previous day's high 1 time.
Westlake Chemical Corporation manufactures and markets basic chemicals, vinyls, polymers, and building products. It operates through two segments, Olefins and Vinyls. The Olefins segment offers ethylene, polyethylene, styrene monomer, and various ethylene co-products, as well as sells propylene, crude butadiene, pyrolysis gasoline, and hydrogen. The Vinyls segment provides specialty and commodity PVC, VCM, EDC, chlorine, caustic soda, chlorinated derivative, and ethylene products. This segment also manufactures and sells products fabricated from PVC, including pipe, fittings, profiles, trims, mouldings, fence and decking products, window and door components, and film and sheet products. The company's products are used in various consumer and industrial markets, including flexible and rigid packaging, automotive products, coatings, and residential and commercial construction, as well as other durable and non-durable goods. Westlake Chemical Corporation also offers its products to a range of customers, including chemical processors, plastics fabricators, small construction contractors, municipalities, and supply warehouses primarily in North America and Europe. The company was founde...
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