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50 leading chemical companies in Illinois

Tamtam tracks 74 chemical companies headquartered in Illinois. This list ranks the 50 largest by number of employees on LinkedIn, led by ADM, Nalco Water, An Ecolab Company and James Hardie. Their median headcount is 629. Half of them were founded in 1964 or later. The most common headquarters are Chicago (14), Aurora (3) and Northbrook (3).

馃嚭馃嚫 Illinois50 companiesUpdated Nov 12, 2026

These companies are primarily large chemical manufacturers and related industries based in Illinois, with a significant presence in Chicago and its suburbs. They often focus on specialized products and solutions for industrial and commercial applications. Companies like ADM, a global nutrition company, and Nalco Water, an Ecolab Company, which specializes in water and process management solutions, exemplify this. Others include CF Industries, manufacturing clean energy products, and Stepan Company, a global manufacturer of specialty chemical products.

The data shows a strong concentration of headquarters in Chicago and its surrounding areas, indicating a regional hub for chemical and manufacturing industries. Many of these firms, such as ADM (founded in 1902) and Rust-Oleum Corporation (founded in 1921), have long histories, suggesting established businesses rather than new startups.

#CompanyIndustryHeadquarters EmployeesFounded
1
ADMadm.com

Global nutrition company transforming industries with plant-based solutions, sustainable practices, and cutting-edge innovations for a healthier, more environmentally friendly future

Food and Beverage Manufacturing 馃嚭馃嚫 Chicago 42,789 1902
2
Nalco Water, An Ecolab Companyecolab.com

A global leader in water and process management solutions, leveraging connected chemistry and digital innovation to optimize sustainability and business outcomes

Chemical Manufacturing 馃嚭馃嚫 Naperville 12,751 n/a
3
James Hardiejameshardie.com

Global leader in high-performance fiber cement and fiber gypsum building solutions, empowering homeowners and professionals worldwide with premium quality products for design and protection

Wholesale Building Materials 馃嚭馃嚫 Chicago 5,022 n/a
4
Amrizeamrize.com

Partner for professional builders offering advanced branded construction solutions across North America with extensive distribution and diverse market coverage.

Construction 馃嚭馃嚫 Chicago 3,904 n/a
5
Mauser Packaging Solutionsmauserpackaging.com

Global leader in packaging solutions and services across the packaging lifecycle, providing metal, plastic, fiber, and hybrid packaging to various industries.

Packaging and Containers Manufacturing 馃嚭馃嚫 Oak Brook 3,122 n/a
6
CF Industriescfindustries.com

Manufacturing and distributing clean energy products with efficient, cost-advantaged facilities and extensive storage and transportation networks across North America and the UK.

Chemical Manufacturing 馃嚭馃嚫 Northbrook 2,736 1946
7
Stepan Companystepan.com

A global manufacturer of specialty chemical products, Stepan collaborates with customers to provide innovative, high-quality solutions for various markets worldwide

Chemical Manufacturing 馃嚭馃嚫 Northbrook 2,210 1932
8
EVRAZ North Americaevrazna.com

A leading North American manufacturer of steel products for rail, energy, and industrial markets, prioritizing safety, community involvement, and innovation

Manufacturing 馃嚭馃嚫 Chicago 1,821 2007
9
Pregispregis.com

Global provider of protective packaging materials and systems for consumer and industrial markets, with a focus on sustainability and innovation

Packaging and Containers Manufacturing 馃嚭馃嚫 Chicago 1,682 1997
10
Rust-Oleum Corporationrustoleum.com

development and manufacturing of innovative, durable coatings and paints designed to protect surfaces from corrosion and transform appearances

Manufacturing 馃嚭馃嚫 Vernon Hills 1,548 1921
11
Crystal Cleancrystal-clean.com

A national leader in environmental services, HCC operates a network of branches across the US, focusing on environmentally sustainable waste disposal and recycling

Environmental Services 馃嚭馃嚫 Hoffman Estates 1,375 1999
12
FUCHS LUBRICANTS CO.fuchs.com

Global leader in specialty lubricants, offering innovative products for various industries worldwide, with a focus on quality, innovation, and customer service

Chemical Manufacturing 馃嚭馃嚫 Harvey 1,349 1931
13
INX International Ink Co.inxinternational.com

A leading ink and coating supplier specializing in printing formulations for various applications, offering customizable solutions with a strong focus on digital printing integration

Chemical Manufacturing 馃嚭馃嚫 Schaumburg 1,332 1992
14
EPSepscca.com

This company provides high performance resins and colorants for coatings and adhesives industries, with a focus on customer success and innovation

Chemical Manufacturing 馃嚭馃嚫 Marengo 1,332 n/a
15
Voyant Beautyvoyantbeauty.com

This company specializes in developing and manufacturing high-performance personal care and beauty products, offering marketing insights, ingredient research, and award-winning products

Personal Care Product Manufacturing 馃嚭馃嚫 Hodgkins 1,260 1989
16
The AZEK Companyazekco.com

Design and manufacture sustainable, low-maintenance outdoor living products using recycled materials, including decking, railing, trim, and pergolas.

Wholesale Building Materials 馃嚭馃嚫 Chicago 1,177 1983
17
Coveris Groupcoveris.com

Provider of packaging solutions enhancing safety, quality, and convenience Collaborating with global brands to protect food, medical supplies, and electronic devices

Packaging and Containers Manufacturing 馃嚭馃嚫 Chicago 1,107 2013
18
Charter Next Generationcnginc.com

A leading manufacturer of sustainable specialty films and flexible packaging solutions, committed to environmental protection, innovation, and a greener future

Chemical Manufacturing 馃嚭馃嚫 Chicago 987 n/a
19
Primientprimient.com

The company is a top producer of plant-based food and industrial ingredients, prioritizing safety, quality, and sustainability in their practices

Food and Beverage Manufacturing 馃嚭馃嚫 Schaumburg 877 2022
20
PLZ Corpplzcorp.com

Develops, manufactures, packages, and distributes a comprehensive line of contract fill, branded, and private-label specialty aerosol products for home and industrial use.

Chemical Manufacturing 馃嚭馃嚫 Downers Grove 822 1939
21
Vantage Specialty Chemicalsvantagegrp.com

Delivers natural chemical solutions, formulations, ingredients, and actives for diverse industries including personal care, food, agriculture, and pharmaceuticals.

Chemical Manufacturing 馃嚭馃嚫 Deerfield 720 2008
22
Century Aluminumcenturyaluminum.com

Primary aluminum production with operations in the US and Iceland, plus carbon anode manufacturing and alumina mining and refining.

Mining 馃嚭馃嚫 Chicago 695 1995
23
Ozingaozinga.com

A fourth-generation family-owned business providing concrete, materials, energy, and logistics solutions with a focus on quality, service, and community

Wholesale Building Materials 馃嚭馃嚫 Mokena 684 1928
24
Oil-Dri Corporation of Americaoildri.com

A manufacturer of high-quality sorbent products for various markets, including cat litter, fluid purification, agriculture, animal gut health, and sports turf

Mining 馃嚭馃嚫 Chicago 644 n/a
25
SunCoke Energysuncoke.com

Leading producer of high-quality metallurgical coke in the Americas with innovative technology and over 45 years of experience in coke production

Wholesale Building Materials 馃嚭馃嚫 Lisle 629 n/a

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26
BRANDT庐brandt.co

An agriculture company offering advanced inputs, advice, and technical solutions to farmers worldwide, with products distributed in over 80 countries

Farming 馃嚭馃嚫 Springfield 594 1953
27
Valent BioSciencesvalentbiosciences.com

Global leader in developing and commercializing environmentally friendly biorational products for agriculture, public health, and forest health markets, derived from biological origins

Farming 馃嚭馃嚫 Libertyville 594 2000
28
CMC Materialsentegris.com

Specializes in materials and chemical solutions for semiconductor manufacturing, now integrated into Entegris for enhanced capabilities.

Semiconductor Manufacturing 馃嚭馃嚫 Aurora 559 n/a
29
Signode Industrial Groupsignode.com

A global leader in end-of-line packaging solutions with a broad product portfolio and customer-focused innovations for transit packaging requirements

Packaging and Containers Manufacturing 馃嚭馃嚫 Glenview 555 n/a
30
Synergy Flavorssynergytaste.com

Global leader in flavorings, extracts, and essences for the food and beverage industry, providing high quality taste solutions through innovative flavor creations

Food and Beverage Services 馃嚭馃嚫 Wauconda 550 1886
31
INEOS Styrolution America LLCineos-styrolution.com

Global supplier of styrenic solutions for various industries, pioneering innovation and sustainability with world-class production facilities and R&D centers worldwide

Chemical Manufacturing 馃嚭馃嚫 Aurora 507 n/a
32
Old World Industriesowi.com

A 40-year-old company specializing in automotive and heavy duty products for extreme conditions, with a global presence and strong relationships

Chemical Manufacturing 馃嚭馃嚫 Northbrook 407 1973
33
Fiberon Deckingfiberondecking.com

Manufacturing high-performing wood alternative decking, railing and cladding for global residential and commercial construction using sustainable practices and stain resistant hardwood aesthetics.

Wholesale Building Materials 馃嚭馃嚫 Deerfield 388 n/a
34
CETCOmineralstech.com

Global construction technologies subsidiary providing solutions for commercial, industrial, and infrastructure challenges by transforming minerals and polymers into high-performance technologies worldwide

Environmental Services 馃嚭馃嚫 Hoffman Estates 372 1992
35
PurposeBuilt Brandspurposebuiltbrands.com

A leading provider of high-performance products for specialty surfaces, serving both consumers and professionals across various industries nationwide

Manufacturing 馃嚭馃嚫 Gurnee 337 n/a
36
Transcendia, Inc.transcendia.com

A global leader in custom engineered materials for critical product components across various markets with over 5,000 customers worldwide

Packaging and Containers Manufacturing 馃嚭馃嚫 Franklin Park 337 1931
37
KI Industries, Inc.kiindustries.com

Design manufacture decorative plastic die cast components for automotive and appliance industries with focus on aesthetics quality and customer service.

Plastics Manufacturing 馃嚭馃嚫 Berkeley 335 1964
38
United Laboratories, Inc.unitedlabsinc.com

A leader in specialty chemicals since 1964, offering innovative, environmentally safe products while providing exceptional service to thousands of customers

Chemical Manufacturing 馃嚭馃嚫 St. Charles 325 1964
39
Cabot Microelectronicsentegris.com

Global supplier of critical materials to semiconductor manufacturers and pipeline operators, delivering quality solutions through bold innovation to solve customers' challenges

Semiconductor Manufacturing 馃嚭馃嚫 Aurora 322 n/a
40
Advancion Corporationadvancionsciences.com

This company innovates materials and ingredients for essential industries, enriching lives and enabling customers to advance the world

Chemical Manufacturing 馃嚭馃嚫 Buffalo Grove 275 n/a
41
Hallstarhallstar.com

specializes in ester chemistry to develop innovative products and solutions for beauty, personal care, and industrial markets globally.

Chemical Manufacturing 馃嚭馃嚫 Chicago 274 1986
42
Lawter Inc.lawter.com

A global organization within the Harima Chemicals family, focusing on pine chemicals for various industries with innovative formulating technology and worldwide manufacturing capabilities

Chemical Manufacturing 馃嚭馃嚫 Chicago 269 1940
43
Nippon Paint Automotive Americas, Inc.nipponpaintamericas.com

Leader in North American automotive coatings market, providing pre-treatment, E-coat, body paint, and paint for plastics Headquarters in IL with locations in OH, MI, and upcoming TN

Chemical Manufacturing 馃嚭馃嚫 Lansing 262 n/a
44
Valto Engineered Materialscranecomposites.com

A world-leading provider of fiber-reinforced composite materials, specializing in innovative, lightweight products that outperform traditional metals and woods since 1954

Plastics Manufacturing 馃嚭馃嚫 Channahon 261 1954
45
LanzaTechlanzatech.com

The company develops technology to turn carbon pollution into profitable raw materials, offering a commercial solution for reducing emissions and generating revenue

Chemical Manufacturing 馃嚭馃嚫 Skokie 250 2005
46
Citgo Petroleum Corporationcitgo.com

An oil & energy company located in Romeoville, Illinois, specializing in petroleum products and services for businesses and consumers

Oil and Gas 馃嚭馃嚫 Romeoville 239 n/a
47
Gold Eagle Companygoldeagle.com

A Chicago-based, family-owned company manufacturing premium consumer products in the USA, focused on quality, sustainability, and employee well-being

Chemical Manufacturing 馃嚭馃嚫 Chicago 234 1932
48
Turtle Wax, Inc.turtlewax.com

A leading car care brand with over 75 years of innovation, offering top-selling products distributed globally and rooted in Chicago

Motor Vehicle Manufacturing 馃嚭馃嚫 Lombard 226 1946
49
Finkl Steelfinkl.com

A leading supplier of forged die steels, plastic mold steels, die cast tool steels, and custom open-die forgings with industry-leading technical knowledge and expertise

Primary Metal Manufacturing 馃嚭馃嚫 Chicago 222 1879
50
Kensingkensingsolutions.com

The company specializes in producing premium quality sterols, natural vitamin E, anionic surfactants, and esters using pure ingredients while focusing on sustainability and innovation

Chemical Manufacturing 馃嚭馃嚫 Kankakee 216 2021

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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 12, 2026.

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