Westlake Corporation engages in the manufacture and marketing of performance and essential materials, and housing and infrastructure products in the United States, Canada, Germany, China, Mexico, Brazil, France, Italy, Taiwan, and internationally. The company operates through two segments: Performance and Essential Materials and Housing and Infrastructure Products. The Performance and Essential Materials segment offers ethylene, polyethylene, styrene, chlorinated derivative products, ethylene dichloride, vinyl chloride monomer, polyvinyl chloride (PVC), epoxy specialty resins, and base epoxy resins and intermediaries, as well as chlor-alkali, such as chlorine and caustic soda. The Housing and Infrastructure Products segment provides residential PVC sidings; PVC trim and mouldings; architectural stone veneers; windows; PVC decking; PVC films for various inflatables, wallcovering, and tape and roofing applications; polymer composite and cement roof tiles; PVC pipes and fittings for various water, sewer, electrical, and industrial applications; PVC compounds used in various housing, medical, and automobile products; and consumer and commercial products, such as landscape edging; industrial, home, and office matting; marine dock edging; and masonry joint controls. It offers its products to chemical processors, plastics fabricators, small construction contractors, municipalities, and supply warehouses for use in various consumer and industrial markets, including residential construction, flexible and rigid packaging, automotive products, healthcare products, water treatment, wind turbines, and coatings, as well as other durable and non-durable goods. The company was formerly known as Westlake Chemical Corporation and changed its name to Westlake Corporation in February 2022. Westlake Corporation was founded in 1986 and is headquartered in Houston, Texas. Westlake Corporation operates as a subsidiary of TTWF LP.

Albemarle Corporation develops, manufactures, and markets engineered specialty chemicals worldwide. It operates through three segments: Energy Storage, Specialties and Ketjen. The Energy Storage segment offers lithium compounds, including lithium carbonate, lithium hydroxide, and lithium chloride; technical services for the handling and use of reactive lithium products; and lithium-containing by-products recycling services. The Specialties segment provides bromine-based specialty chemicals, including elemental bromine, alkyl and inorganic bromides, brominated powdered activated carbon, and other bromine fine chemicals; lithium specialties, such as butyllithium and lithium aluminum hydride; develops and manufactures cesium products for the chemical and pharmaceutical industries; and zirconium, barium, and titanium products for pyrotechnical applications that include airbag initiators. The Ketjen segment offers clean fuels technologies (CFT), which is composed of hydroprocessing catalysts (HPC) together with isomerization and akylation catalysts; fluidized catalytic cracking (FCC) catalysts and additives; and performance catalyst solutions (PCS), which is composed of organometallics and curatives. The company serves the energy storage, petroleum refining, consumer electronics, construction, automotive, lubricants, pharmaceuticals, and crop protection markets. Albemarle Corporation was founded in 1887 and is headquartered in Charlotte, North Carolina.

Celanese Corporation, a chemical and specialty materials company, manufactures and sells high performance engineered polymers in the United States and internationally. It operates through Engineered Materials and Acetyl Chain. The Engineered Materials segment develops, produces, and supplies specialty polymers for automotive and medical applications, as well as for use in industrial products and consumer electronics. The Acetyl Chain segment produces and supplies acetyl products, including acetic acid, vinyl acetate monomers, acetic anhydride, and acetate esters that are used as starting materials for colorants, paints, adhesives, coatings, and pharmaceuticals; and organic solvents and intermediates for pharmaceutical, agricultural, and chemical products. It also offers vinyl acetate-based emulsions for use in paints and coatings, adhesives, construction, glass fiber, textiles, and paper applications; and ethylene vinyl acetate resins and compounds, as well as low-density polyethylene for use in flexible packaging films, lamination film products, hot melt adhesives, automotive parts, and carpeting applications. In addition, it provides redispersible powders (RDP) for use in construction applications, including flooring, plasters, insulation, tiling, and waterproofing. Celanese Corporation was founded in 1918 and is headquartered in Irving, Texas.

Cabot Corporation operates as a specialty chemicals and performance materials company. The company operates through two segments, Reinforcement Materials and Performance Chemicals. It offers reinforcing carbons that are used in tires as a rubber reinforcing agent and performance additive, as well as in industrial products, such as hoses, belts, extruded profiles, and molded goods; and engineered elastomer composites solutions. The company also provides specialty carbons for use in inks, coatings, plastics, adhesives, toners, batteries, and displays; conductive additives and fumed alumina used in lead acid and lithium-ion batteries for electric vehicles; fumed silica used in adhesives, sealants, cosmetics, batteries, inks, toners, silicone elastomers, coatings, polishing slurries, and pharmaceuticals; and fumed alumina for use in various products, including inkjet media, lighting, coatings, cosmetics, and polishing slurries. In addition, it offers aerogel, a hydrophobic, silica-based particle to use in various thermal insulation and specialty chemical applications; masterbatch and conductive compound products that are used in automotive, industrial, packaging, infrastructure, agriculture, consumer products, and electronics industries; and inkjet colorants for inkjet printing applications, as well as carbon nanotubes and fumed metal oxides. The company sells its products through distributors and sales representatives in the Americas, Europe, the Middle East, Africa, and the Asia Pacific. Cabot Corporation was founded in 1882 and is headquartered in Boston, Massachusetts.

Innospec Inc. develops, manufactures, blends, markets, and supplies specialty chemicals in the United States, rest of North America, the United Kingdom, rest of Europe, and internationally. The company's Fuel Specialties segment offers a range of specialty chemical products that are used as additives in additives in diesel, jet, marine, fuel oil and other fuels. This segment's products are used in the operation of commercial trucking, marine and aviation engines, power station generators, heating oil, and other industrial machinery applications. Its Performance Chemicals segment provides technology-based solutions for its customers' processes or products that focuses on the personal care, home care, agrochemical, construction, mining, and other industrial markets. The company's Oilfield Services segment develops and markets chemical solutions for drilling, completion, fracturing, stimulation, and completion operations; and products for oil and gas production. It sells its products primarily to oil and gas exploration and production companies, oil refineries, fuel manufacturers and users, personal care and home care companies, formulators of agrochemical, and other chemical and industrial companies. The company was formerly known as Octel Corp. and changed its name to Innospec Inc. in January 2006. Innospec Inc. was founded in 1938 and is headquartered in Englewood, Colorado.

The Chemours Company provides performance chemicals in North America, the Asia Pacific, Europe, the Middle East, Africa, and Latin America. It operates through three segments: Titanium Technologies, Thermal & Specialized Solutions, and Advanced Performance Materials. The Titanium Technologies segment provides TiO2 pigment under the Ti-Pure brand for delivering whiteness, brightness, opacity, durability, efficiency, and protection in various of applications, such as architectural and industrial coatings, flexible and rigid plastic packaging, polyvinylchloride, laminate papers used for furniture and building materials, coated paper, and coated paperboard used for packaging. The Thermal & Specialized Solutions segment offers of refrigerants, thermal management solutions, propellants, foam blowing agents, and specialty solvents. The Advanced Performance Materials segment products portfolio includes various industrial resins, specialty products, membranes, and coatings for electronics, communications, transportation, wire and cable, energy, oil and gas, and medical, and other applications under the eflon, Viton, Krytox, and Nafion brands. The company sells its products through direct and indirect channels, as well as through a network of resellers and distributors. The Chemours Company was incorporated in 2014 and is headquartered in Wilmington, Delaware.

Orion S.A., together with its subsidiaries, engages in the manufacture and sale of carbon black products. It operates in two segments, Specialty Carbon Black and Rubber Carbon Black. The company offers post-treated specialty carbon black grades for coatings and printing applications; high purity carbon black grades for the fiber industry; and conductive carbon black grades for batteries, polymers, and coatings. It also provides rubber carbon black products for applications in mechanical rubber goods, as well as in tires under the ECORAX brand name; and acetylene-based conductive additives for lithium-ion batteries and other applications. It operates in the United States, Brazil, rest of the Americas, Germany, South Africa, Italy, Spain, Turkey, France, Rest of EMEA, China, the Republic of Korea, and rest of Asia. The company was formerly known as Orion Engineered Carbons S.A. and changed its name to Orion S.A. in June 2023. Orion S.A. was founded in 1862 and is headquartered in Senningerberg, Luxembourg.

Arq, Inc. produces activated carbon products in North America. The company's products include granular activated carbon, powdered and granular activated carbon, and colloidal carbon products; Arq Powder Wetcake, a fine and low-ash coal waste-derived particle; and additives for air emissions control. Its products are used in various applications, including water treatment, ground water remediation, soil sediments, air emissions, and asphalt additives. The company was formerly known as Advanced Emissions Solutions, Inc. and changed its name to Arq, Inc. in February 2024. Arq, Inc. was founded in 1997 and is headquartered in Greenwood Village, Colorado.