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The 50 largest chemical companies in Texas

Tamtam tracks 140 chemical companies headquartered in Texas. This list ranks the 50 largest by number of employees on LinkedIn, led by INEOS Oligomers, LyondellBasell and Celanese. Their median headcount is 1,626. Half of them were founded in 1970 or later. The most common headquarters are Houston (18), Irving (6) and Dallas (5).

馃嚭馃嚫 Texas50 companiesUpdated Nov 11, 2026

These Texas-based companies are predominantly large firms in the chemical manufacturing and oil and gas sectors. Many were founded in the late 20th or early 21st century. For example, LyondellBasell, founded in 2007, produces innovative polymers, while Celanese, established in 1912, is a global leader in specialty material solutions. Huntsman Corporation, founded in 1970, focuses on sustainable chemical products, and Westlake, founded in 1986, manufactures petrochemicals and building products.

A clear pattern among these companies is their significant presence in the Houston area, with LyondellBasell, Westlake, CITGO, M-I SWACO US Land, and Motiva Enterprises LLC all headquartered there. This concentration highlights Houston as a major hub for the chemical and oil and gas industries within Texas. HF Sinclair and Oldcastle BuildingEnvelope are both based in Dallas, indicating another cluster of activity.

#CompanyIndustryHeadquarters EmployeesFounded
1
INEOS Oligomersineos.com

A chemicals company headquartered in League City, Texas, specializing in oligomers and other chemical products for various industries

Chemical Manufacturing 馃嚭馃嚫 League City 26,000 n/a
2
LyondellBaselllyondellbasell.com

Leading global chemical company producing innovative polymers and polyolefins for sustainable transportation, food safety, clean water, and healthcare applications.

Chemical Manufacturing 馃嚭馃嚫 Houston 15,172 2007
3
Celanesecelanese.com

Global leader in chemistry, producing specialty material solutions for various industries through sustainable practices, innovation, and community involvement

Chemical Manufacturing 馃嚭馃嚫 Irving 7,348 1912
4
Huntsman Corporationhuntsman.com

A global chemical company focused on shaping a sustainable future through innovative products that enhance energy efficiency and reduce waste and emissions

Chemical Manufacturing 馃嚭馃嚫 The Woodlands 6,996 1970
5
Westlakewestlake.com

Manufacturing and supplying petrochemicals, plastics, and building products globally, enhancing daily life through quality products and services.

Chemical Manufacturing 馃嚭馃嚫 Houston 6,574 1986
6
HF Sinclairhfsinclair.com

Manufactures and sells light products, fuels, lubricants, and asphalt; operates refineries; markets motor fuel; produces renewable diesel and specialized lubricants.

Oil and Gas 馃嚭馃嚫 Dallas 6,426 n/a
7
ATIatimaterials.com

A global leader in materials science, providing solutions for extreme challenges in aerospace, defense, medical, and industrial applications worldwide

Aviation and Aerospace Component Manufacturing 馃嚭馃嚫 Dallas 5,959 1996
8
CITGOcitgo.com

Operates refineries, terminals, and pipelines to transport and market fuels, lubricants, petrochemicals, and industrial products to retail outlets.

Oil and Gas 馃嚭馃嚫 Houston 5,326 1983
9
Chevron Phillips Chemical Companycpchem.com

Leading global manufacturer and supplier of olefins, polyolefins, aromatics, specialty chemicals, plastic piping, and polymer resins with extensive facilities.

Chemical Manufacturing 馃嚭馃嚫 Spring 4,704 2000
10
M-I SWACO US Landslb.com

An innovative company offering customized drilling fluid solutions through cutting-edge technology and a strong supply chain, focusing on client satisfaction and cost reduction

Oil and Gas 馃嚭馃嚫 Houston 3,109 2005
11
Safety-Kleensafety-kleen.com

Leading environmental services company offering used oil recycling, parts cleaning, and other responsible solutions to protect customers and the environment

Environmental Services 馃嚭馃嚫 Plano 3,098 n/a
12
Motiva Enterprises LLCmotiva.com

A Houston-based company refines, distributes, and markets petroleum products in the Americas with a large manufacturing complex in Texas Owned by Aramco

Oil and Gas 馃嚭馃嚫 Houston 2,803 1998
13
Darling Ingredientsdarlingii.com

Transforms animal agriculture and food industry by-products into ingredients for nutrition, animal feed, crops, and renewable energy worldwide.

Manufacturing 馃嚭馃嚫 Irving 2,759 1882
14
ALKEGENalkegen.com

Specialty materials leader for mission-critical systems in battery technologies, electric vehicles, filtration media, and insulation materials to promote sustainability and energy savings

Industrial Machinery Manufacturing 馃嚭馃嚫 Irving 2,527 n/a
15
Oldcastle BuildingEnvelopeobe.com

Manufacturing, fabricating, and distributing architectural glass products, aluminum framing systems, and glazing supplies for diverse construction projects across North America.

Wholesale Building Materials 馃嚭馃嚫 Dallas 2,132 n/a
16
Ascend Performance Materialsascendmaterials.com

Global manufacturer specializing in nylon 6,6 materials for diverse applications including apparel, automotive parts, electronics, and industrial products.

Chemical Manufacturing 馃嚭馃嚫 Houston 2,065 2009
17
SI Groupsiigroup.com

Provides performance additives and intermediates for pharmaceuticals, plastics, oil and gas, tires, enhancing efficacy and productivity in manufacturing.

Chemical Manufacturing 馃嚭馃嚫 The Woodlands 1,988 1906
18
Nippon Sanso MATHESONus.nipponsanso.com

Supplier of industrial and specialty gases, gas handling equipment, purification systems, generators, and support services for labs and semiconductor manufacturers worldwide

Chemical Manufacturing 馃嚭馃嚫 Irving 1,926 1927
19
Indorama Ventures: Indovinyaindovinya.indoramaventures.com

A global producer of chemical intermediates and surfactants with a focus on sustainable solutions for various industries, part of a leading petrochemical group

Chemical Manufacturing 馃嚭馃嚫 The Woodlands 1,835 n/a
20
Nalco Champion, An Ecolab Companyecolab.com

Provider of specialized services and solutions for the upstream and downstream sectors, now operating as ChampionX and Nalco Water

Oil and Gas 馃嚭馃嚫 Sugar Land 1,817 n/a
21
AZZ Incazz.com

A leading provider of galvanizing, metal coating, and coil coating solutions, offering corrosion protection to the steel fabrication and coil markets in North America

Metal Treatments 馃嚭馃嚫 Fort Worth 1,799 1956
22
Select Water Solutionsselectwater.com

A leader in water management and chemical technology for oil and gas industry, offering comprehensive solutions for well lifecycle optimization

Oil and Gas 馃嚭馃嚫 Gainesville 1,780 2008
23
Vibrantz Technologies Inc.vibrantz.com

A global technology leader specialized in color solutions, functional coatings, and specialty minerals to enhance products across various end markets

Chemical Manufacturing 馃嚭馃嚫 Houston 1,632 2022
24
Newparknewpark.com

A global provider of efficient and sustainable solutions in fluids systems and mats for various industries worldwide Partnering to deliver reliable services

Oil and Gas 馃嚭馃嚫 Katy 1,629 1932
25
HALLIBURTON ENERGY SERVICEShalliburton.com

Global energy industry provider with over a century of experience in maximizing reservoir value through various products and services worldwide

Oil and Gas 馃嚭馃嚫 Houston 1,626 1919

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26
TETRA Technologies, Inc.onetetra.com

Global energy services company specializing in bromine-based fluids, calcium chloride solutions, water management, frac flowback, and well testing services with a focus on low carbon energy markets

Oil and Gas 馃嚭馃嚫 Spring 1,599 1981
27
Cemex UScemexusa.com

Global leader in supplying cement, aggregates, concrete, and urbanization solutions while driving innovation to solve building challenges and promote sustainable living

Wholesale Building Materials 馃嚭馃嚫 Houston 1,476 n/a
28
Quanexquanex.com

A global manufacturing company focused on innovation, efficiency, community impact, shareholder value, and employee development in various markets worldwide

Wholesale Building Materials 馃嚭馃嚫 Houston 1,420 1927
29
Kraton Corporationkraton.com

Development and production of biobased chemicals and specialty polymers serving over 800 customers globally with sustainable, innovative solutions.

Chemical Manufacturing 馃嚭馃嚫 The Woodlands 1,399 n/a
30
Heidelberg Materials North Americaheidelbergmaterials.us

Supplying cement, aggregates, ready mixed concrete, asphalt and other essential building materials for infrastructure and commercial development throughout diverse North American markets.

Wholesale Building Materials 馃嚭馃嚫 Irving 1,351 1897
31
Wilsonartwilsonart.com

Manufacture and distribute high-performance decorative engineered surfaces including laminates, countertops, adhesives, and wall panels for multiple commercial and residential markets.

Wholesale Building Materials 馃嚭馃嚫 Temple 1,319 n/a
32
HollyFrontierhfsinclair.com

Independent petroleum refiner producing gasoline, diesel, jet fuel, asphalt, lubricants, operating refineries and logistics in U.S. regions.

Oil and Gas 馃嚭馃嚫 Dallas 1,265 n/a
33
BJ Energy Solutionsbjenergy.com

An industry leader in hydraulic fracturing solutions for upstream oil and gas companies, focusing on innovation, sustainability, and emission reductions

Oil and Gas 馃嚭馃嚫 The Woodlands 1,249 1872
34
CalTexcaltexus.com

Leading manufacturer of environmental and appearance protection products for automotive industry, based in San Antonio, Texas Also offers detail products and reinsurance services

Motor Vehicle Manufacturing 馃嚭馃嚫 Schertz 1,147 1983
35
Poly-America, LPpoly-america.com

A leading producer of polyethylene products including construction film, trash bags, geomembrane liners, and a top polyethylene recycler and compounder

Plastics Manufacturing 馃嚭馃嚫 Grand Prairie 1,072 1976
36
Matheson Tri-Gasmathesongas.com

Supplier of industrial and specialty gases, gas handling equipment, gas purification systems, generators, and management accessories for various industries worldwide

Chemicals 馃嚭馃嚫 Irving 1,053 n/a
37
Lummus Technologylummustechnology.com

A global leader in developing technology solutions for a sustainable, low carbon future, specializing in process technologies, catalysts, equipment, and digitalization

Business Consulting and Services 馃嚭馃嚫 Houston 1,027 1907
38
CVR Partners, LPcvrpartners.com

A growth-oriented company producing nitrogen fertilizer using advanced technologies, serving a growing population with a focus on value, safety, and environmental consciousness

Chemical Manufacturing 馃嚭馃嚫 Sugar Land 869 n/a
39
Ecobatecobat.com

Global leader in battery recycling, providing sustainable solutions for essential energy storage needs in a circular economy Powers industries worldwide Offers job opportunities

Mining 馃嚭馃嚫 Dallas 863 1938
40
Axiall, a Westlake Companywestlake.com

Chemical and building products company acquired by Westlake Corporation, focusing on manufacturing and supplying essential industrial materials.

Chemical Manufacturing 馃嚭馃嚫 Houston 849 n/a
41
CVR Energy, Inc.cvrenergy.com

Diversified holding company in Sugar Land, Texas, engaged in renewable fuels, petroleum refining, nitrogen fertilizer manufacturing, with strong financial performance and growth

Oil and Gas 馃嚭馃嚫 Sugar Land 842 1906
42
A. Schulman, Inc.lyondellbasell.com

production of plastics, chemicals, and refining products used in packaging, water pipes, automotive, electronics, and appliance industries worldwide.

Plastics Manufacturing 馃嚭馃嚫 Houston 840 1928
43
U.S. Silica Companyussilica.com

Global performance materials company specializing in commercial silica for oil and gas and industrial applications, with expertise in mining, processing, and logistics

Mining 馃嚭馃嚫 Katy 838 1900
44
Orion S.A.orioncarbons.com

Supplier of carbon black powder and pellets for tires, coatings, batteries, plastics, providing reinforcement, conductivity, durability, and UV protection worldwide.

Chemical Manufacturing 馃嚭馃嚫 Spring 836 2011
45
TPC Grouptpcgrp.com

A Houston-based company specializing in chemical products for major chemical and petroleum companies worldwide, focusing on hydrocarbon processing and specialty chemicals

Chemical Manufacturing 馃嚭馃嚫 Houston 781 1944
46
KMGkmgchemicals.com

Manufacture, formulate, and distribute specialty chemicals for electronics, wood preservation, and industrial lubricants markets worldwide with high purity standards.

Chemical Manufacturing 馃嚭馃嚫 Fort Worth 774 1986
47
Kuraray America, Inc.kuraray.us.com

pioneers, manufactures, sells resins, chemicals, activated carbon, fibers, textiles, specialty dental materials, other functional products, improving environment, enhancing global life quality of life

Chemical Manufacturing 馃嚭馃嚫 Houston 757 1963
48
CITGOcitgo.com

A brief description is provided on the LinkedIn profile

Oil and Gas 馃嚭馃嚫 Houston 749 1983
49
UPGupgintl.com

A US-based manufacturer specializing in OEM, contract manufacturing, and injection molding for data centers, automotive, and general industrial markets worldwide

Plastics Manufacturing 馃嚭馃嚫 Houston 625 1954
50
Genesis Energy, L.P.genesisenergy.com

A diversified midstream energy company offering supply and logistics solutions in offshore pipeline transportation, chemicals, onshore facilities, and marine transportation

Oil and Gas 馃嚭馃嚫 Houston 618 1996

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.

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