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Compare · TSE vs WLK

TSE vs WLK

Side-by-side comparison of Trinseo PLC (TSE) and Westlake Corporation (WLK): market cap, price performance, sector, and recent activity on the wire.

Summary

  • Both TSE and WLK operate in Major Chemicals (Industrials), so they compete in similar markets.
  • WLK is the larger of the two at $10.84B, about 5.3x TSE ($2.06B).
  • Over the past year, TSE is down 92.6% and WLK is up 11.4% - WLK leads by 104.0 points.
  • WLK has hit the wire 4 times in the past 4 weeks while TSE has been quiet.
  • WLK has more recent analyst coverage (25 ratings vs 5 for TSE).
PerformanceTSE-92.61%WLK-3.63%
2025-06-09+0.00%2026-02-27
MetricTSEWLK
Company
Trinseo PLC
Westlake Corporation
Price
$0.23-4.89%
$84.57-0.91%
Market cap
$2.06B
$10.84B
1M return
-49.92%
-15.36%
1Y return
-92.61%
+11.41%
Industry
Major Chemicals
Major Chemicals
Exchange
NYSE
NYSE
IPO
2014
2004
News (4w)
0
4
Recent ratings
5
25
TSE

Trinseo PLC

Trinseo S.A., a materials company, manufactures and markets synthetic rubber, latex binders, and plastic products in the United States, Europe, the Asia-Pacific, and internationally. The company operates through six segments: Latex Binders, Synthetic Rubber, Performance Plastics, Polystyrene, Feedstocks, and Americas Styrenics. The Latex Binders segment offers styrene-butadiene, styrene-acrylate, vinylidene chloride, and butadiene-methacrylate latex products for the carpet and artificial turf markets, as well as performance latex products for the adhesive, building and construction, and technical textile paper market. The Synthetic Rubber segment provides styrene-butadiene rubber, emulsion styrene-butadiene rubber, nickel polybutadiene rubber, and neodymium polybutadiene rubber for use in tires and modifiers, as well as technical rubber products, such as conveyor belts, hoses, seals, and gaskets. The Performance Plastics segment offers engineered compounds and blends for the automotive, consumer electronics, medical, electrical, building and construction, appliance, and lighting markets. This segment also offers acrylonitrile-butadiene-styrene, styrene-acrylonitrile, and polycarbonate solutions; and soft-touch polymers and bioplastics, such as thermoplastic elastomers. The Polystyrene segment provides general purpose polystyrenes and high impact polystyrene for use in appliances, food packaging and food service disposables, consumer electronics, and building and construction materials. The Feedstocks segment offers styrene monomer, a basic building block of plastic. The Americas Styrenics segment provides styrene and polystyrene. Trinseo S.A. was founded in 2010 and is based in Berwyn, Pennsylvania.

WLK

Westlake Corporation

Westlake Chemical Corporation, together with its subsidiaries, manufactures and markets basic chemicals, vinyls, polymers, and building products worldwide. It operates through two segments, Vinyls and Olefins. The Vinyls segment provides specialty and commodity polyvinyl chloride (PVC), vinyl chloride monomers, ethylene dichloride, chlorine, caustic soda, chlorinated derivative, and ethylene products. This segment also manufactures and sells PVC compounds and building products fabricated from PVC, including residential siding, trim and molding, pipe and fittings for various water, sewer and industrial applications, profiles for windows and doors, decking products, films for various inflatables, wall covering tapes, roofing applications, and composite roof tiles. The Olefins segment offers polyethylene, styrene monomers, and various ethylene co-products, as well as sells propylene, crude butadiene, pyrolysis gasoline, and hydrogen products. Westlake Chemical Corporation offers its products to a range of customers, including chemical processors, plastics fabricators, small construction contractors, municipalities, and supply warehouses in various consumer and industrial markets, such as flexible and rigid packaging, automotive products, coatings, water treatment, refrigerants, and residential and commercial construction, as well as other durable and non-durable goods. The company was founded in 1986 and is headquartered in Houston, Texas. Westlake Chemical Corporation is a subsidiary of TTWF LP.

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