# 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).

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.

🇺🇸 Illinois · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [ADM](https://www.tamtam.ai/c/adm) (adm.com)<br>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 | 🇺🇸 Chicago | 42,789 | 1902 |
| 2 | [Nalco Water, An Ecolab Company](https://www.tamtam.ai/c/nalco-water-an-ecolab-company) (ecolab.com)<br>A global leader in water and process management solutions, leveraging connected chemistry and digital innovation to optimize sustainability and business outcomes | Chemical Manufacturing | 🇺🇸 Naperville | 12,751 |  |
| 3 | [James Hardie](https://www.tamtam.ai/c/james-hardie) (jameshardie.com)<br>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 | 🇺🇸 Chicago | 5,022 |  |
| 4 | [Amrize](https://www.tamtam.ai/c/amrize) (amrize.com)<br>Partner for professional builders offering advanced branded construction solutions across North America with extensive distribution and diverse market coverage. | Construction | 🇺🇸 Chicago | 3,904 |  |
| 5 | [Mauser Packaging Solutions](https://www.tamtam.ai/c/mauser-packaging-solutions) (mauserpackaging.com)<br>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 | 🇺🇸 Oak Brook | 3,122 |  |
| 6 | [CF Industries](https://www.tamtam.ai/c/cf-industries) (cfindustries.com)<br>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 | 🇺🇸 Northbrook | 2,736 | 1946 |
| 7 | [Stepan Company](https://www.tamtam.ai/c/stepan-company) (stepan.com)<br>A global manufacturer of specialty chemical products, Stepan collaborates with customers to provide innovative, high-quality solutions for various markets worldwide | Chemical Manufacturing | 🇺🇸 Northbrook | 2,210 | 1932 |
| 8 | [EVRAZ North America](https://www.tamtam.ai/c/evraz-north-america) (evrazna.com)<br>A leading North American manufacturer of steel products for rail, energy, and industrial markets, prioritizing safety, community involvement, and innovation | Manufacturing | 🇺🇸 Chicago | 1,821 | 2007 |
| 9 | [Pregis](https://www.tamtam.ai/c/pregis) (pregis.com)<br>Global provider of protective packaging materials and systems for consumer and industrial markets, with a focus on sustainability and innovation | Packaging and Containers Manufacturing | 🇺🇸 Chicago | 1,682 | 1997 |
| 10 | [Rust-Oleum Corporation](https://www.tamtam.ai/c/rust-oleum-corporation) (rustoleum.com)<br>development and manufacturing of innovative, durable coatings and paints designed to protect surfaces from corrosion and transform appearances | Manufacturing | 🇺🇸 Vernon Hills | 1,548 | 1921 |
| 11 | [Crystal Clean](https://www.tamtam.ai/c/crystal-clean) (crystal-clean.com)<br>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 | 🇺🇸 Hoffman Estates | 1,375 | 1999 |
| 12 | [FUCHS LUBRICANTS CO.](https://www.tamtam.ai/c/fuchs-lubricants-co) (fuchs.com)<br>Global leader in specialty lubricants, offering innovative products for various industries worldwide, with a focus on quality, innovation, and customer service | Chemical Manufacturing | 🇺🇸 Harvey | 1,349 | 1931 |
| 13 | [INX International Ink Co.](https://www.tamtam.ai/c/inx-international-ink-co) (inxinternational.com)<br>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 | 🇺🇸 Schaumburg | 1,332 | 1992 |
| 14 | [EPS](https://www.tamtam.ai/c/eps-marengo) (epscca.com)<br>This company provides high performance resins and colorants for coatings and adhesives industries, with a focus on customer success and innovation | Chemical Manufacturing | 🇺🇸 Marengo | 1,332 |  |
| 15 | [Voyant Beauty](https://www.tamtam.ai/c/voyant-beauty) (voyantbeauty.com)<br>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 | 🇺🇸 Hodgkins | 1,260 | 1989 |
| 16 | [The AZEK Company](https://www.tamtam.ai/c/the-azek-company) (azekco.com)<br>Design and manufacture sustainable, low-maintenance outdoor living products using recycled materials, including decking, railing, trim, and pergolas. | Wholesale Building Materials | 🇺🇸 Chicago | 1,177 | 1983 |
| 17 | [Coveris Group](https://www.tamtam.ai/c/coveris-group-chicago) (coveris.com)<br>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 | 🇺🇸 Chicago | 1,107 | 2013 |
| 18 | [Charter Next Generation](https://www.tamtam.ai/c/charter-next-generation) (cnginc.com)<br>A leading manufacturer of sustainable specialty films and flexible packaging solutions, committed to environmental protection, innovation, and a greener future | Chemical Manufacturing | 🇺🇸 Chicago | 987 |  |
| 19 | [Primient](https://www.tamtam.ai/c/primient) (primient.com)<br>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 | 🇺🇸 Schaumburg | 877 | 2022 |
| 20 | [PLZ Corp](https://www.tamtam.ai/c/plz-corp) (plzcorp.com)<br>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 | 🇺🇸 Downers Grove | 822 | 1939 |
| 21 | [Vantage Specialty Chemicals](https://www.tamtam.ai/c/vantage-specialty-chemicals) (vantagegrp.com)<br>Delivers natural chemical solutions, formulations, ingredients, and actives for diverse industries including personal care, food, agriculture, and pharmaceuticals. | Chemical Manufacturing | 🇺🇸 Deerfield | 720 | 2008 |
| 22 | [Century Aluminum](https://www.tamtam.ai/c/century-aluminum) (centuryaluminum.com)<br>Primary aluminum production with operations in the US and Iceland, plus carbon anode manufacturing and alumina mining and refining. | Mining | 🇺🇸 Chicago | 695 | 1995 |
| 23 | [Ozinga](https://www.tamtam.ai/c/ozinga) (ozinga.com)<br>A fourth-generation family-owned business providing concrete, materials, energy, and logistics solutions with a focus on quality, service, and community | Wholesale Building Materials | 🇺🇸 Mokena | 684 | 1928 |
| 24 | [Oil-Dri Corporation of America](https://www.tamtam.ai/c/oil-dri-corporation-of-america) (oildri.com)<br>A manufacturer of high-quality sorbent products for various markets, including cat litter, fluid purification, agriculture, animal gut health, and sports turf | Mining | 🇺🇸 Chicago | 644 |  |
| 25 | [SunCoke Energy](https://www.tamtam.ai/c/suncoke-energy) (suncoke.com)<br>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 | 🇺🇸 Lisle | 629 |  |
| 26 | [BRANDT®](https://www.tamtam.ai/c/brandt) (brandt.co)<br>An agriculture company offering advanced inputs, advice, and technical solutions to farmers worldwide, with products distributed in over 80 countries | Farming | 🇺🇸 Springfield | 594 | 1953 |
| 27 | [Valent BioSciences](https://www.tamtam.ai/c/valent-biosciences) (valentbiosciences.com)<br>Global leader in developing and commercializing environmentally friendly biorational products for agriculture, public health, and forest health markets, derived from biological origins | Farming | 🇺🇸 Libertyville | 594 | 2000 |
| 28 | [CMC Materials](https://www.tamtam.ai/c/cmc-materials) (entegris.com)<br>Specializes in materials and chemical solutions for semiconductor manufacturing, now integrated into Entegris for enhanced capabilities. | Semiconductor Manufacturing | 🇺🇸 Aurora | 559 |  |
| 29 | [Signode Industrial Group](https://www.tamtam.ai/c/signode-industrial-group) (signode.com)<br>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 | 🇺🇸 Glenview | 555 |  |
| 30 | [Synergy Flavors](https://www.tamtam.ai/c/synergy-flavors) (synergytaste.com)<br>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 | 🇺🇸 Wauconda | 550 | 1886 |
| 31 | [INEOS Styrolution America LLC](https://www.tamtam.ai/c/ineos-styrolution-america-llc) (ineos-styrolution.com)<br>Global supplier of styrenic solutions for various industries, pioneering innovation and sustainability with world-class production facilities and R&D centers worldwide | Chemical Manufacturing | 🇺🇸 Aurora | 507 |  |
| 32 | [Old World Industries](https://www.tamtam.ai/c/old-world-industries) (owi.com)<br>A 40-year-old company specializing in automotive and heavy duty products for extreme conditions, with a global presence and strong relationships | Chemical Manufacturing | 🇺🇸 Northbrook | 407 | 1973 |
| 33 | [Fiberon Decking](https://www.tamtam.ai/c/fiberon-decking) (fiberondecking.com)<br>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 | 🇺🇸 Deerfield | 388 |  |
| 34 | [CETCO](https://www.tamtam.ai/c/cetco) (mineralstech.com)<br>Global construction technologies subsidiary providing solutions for commercial, industrial, and infrastructure challenges by transforming minerals and polymers into high-performance technologies worldwide | Environmental Services | 🇺🇸 Hoffman Estates | 372 | 1992 |
| 35 | [PurposeBuilt Brands](https://www.tamtam.ai/c/purposebuilt-brands) (purposebuiltbrands.com)<br>A leading provider of high-performance products for specialty surfaces, serving both consumers and professionals across various industries nationwide | Manufacturing | 🇺🇸 Gurnee | 337 |  |
| 36 | [Transcendia, Inc.](https://www.tamtam.ai/c/transcendia-inc) (transcendia.com)<br>A global leader in custom engineered materials for critical product components across various markets with over 5,000 customers worldwide | Packaging and Containers Manufacturing | 🇺🇸 Franklin Park | 337 | 1931 |
| 37 | [KI Industries, Inc.](https://www.tamtam.ai/c/ki-industries-inc) (kiindustries.com)<br>Design manufacture decorative plastic die cast components for automotive and appliance industries with focus on aesthetics quality and customer service. | Plastics Manufacturing | 🇺🇸 Berkeley | 335 | 1964 |
| 38 | [United Laboratories, Inc.](https://www.tamtam.ai/c/united-laboratories-inc) (unitedlabsinc.com)<br>A leader in specialty chemicals since 1964, offering innovative, environmentally safe products while providing exceptional service to thousands of customers | Chemical Manufacturing | 🇺🇸 St. Charles | 325 | 1964 |
| 39 | [Cabot Microelectronics](https://www.tamtam.ai/c/cabot-microelectronics) (entegris.com)<br>Global supplier of critical materials to semiconductor manufacturers and pipeline operators, delivering quality solutions through bold innovation to solve customers' challenges | Semiconductor Manufacturing | 🇺🇸 Aurora | 322 |  |
| 40 | [Advancion Corporation](https://www.tamtam.ai/c/advancion-corporation) (advancionsciences.com)<br>This company innovates materials and ingredients for essential industries, enriching lives and enabling customers to advance the world | Chemical Manufacturing | 🇺🇸 Buffalo Grove | 275 |  |
| 41 | [Hallstar](https://www.tamtam.ai/c/hallstar) (hallstar.com)<br>specializes in ester chemistry to develop innovative products and solutions for beauty, personal care, and industrial markets globally. | Chemical Manufacturing | 🇺🇸 Chicago | 274 | 1986 |
| 42 | [Lawter Inc.](https://www.tamtam.ai/c/lawter-inc) (lawter.com)<br>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 | 🇺🇸 Chicago | 269 | 1940 |
| 43 | [Nippon Paint Automotive Americas, Inc.](https://www.tamtam.ai/c/nippon-paint-automotive-americas-inc) (nipponpaintamericas.com)<br>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 | 🇺🇸 Lansing | 262 |  |
| 44 | [Valto Engineered Materials](https://www.tamtam.ai/c/valto-engineered-materials) (cranecomposites.com)<br>A world-leading provider of fiber-reinforced composite materials, specializing in innovative, lightweight products that outperform traditional metals and woods since 1954 | Plastics Manufacturing | 🇺🇸 Channahon | 261 | 1954 |
| 45 | [LanzaTech](https://www.tamtam.ai/c/lanzatech) (lanzatech.com)<br>The company develops technology to turn carbon pollution into profitable raw materials, offering a commercial solution for reducing emissions and generating revenue | Chemical Manufacturing | 🇺🇸 Skokie | 250 | 2005 |
| 46 | [Citgo Petroleum Corporation](https://www.tamtam.ai/c/citgo-petroleum-corporation) (citgo.com)<br>An oil & energy company located in Romeoville, Illinois, specializing in petroleum products and services for businesses and consumers | Oil and Gas | 🇺🇸 Romeoville | 239 |  |
| 47 | [Gold Eagle Company](https://www.tamtam.ai/c/gold-eagle-company) (goldeagle.com)<br>A Chicago-based, family-owned company manufacturing premium consumer products in the USA, focused on quality, sustainability, and employee well-being | Chemical Manufacturing | 🇺🇸 Chicago | 234 | 1932 |
| 48 | [Turtle Wax, Inc.](https://www.tamtam.ai/c/turtle-wax-inc) (turtlewax.com)<br>A leading car care brand with over 75 years of innovation, offering top-selling products distributed globally and rooted in Chicago | Motor Vehicle Manufacturing | 🇺🇸 Lombard | 226 | 1946 |
| 49 | [Finkl Steel](https://www.tamtam.ai/c/finkl-steel) (finkl.com)<br>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 | 🇺🇸 Chicago | 222 | 1879 |
| 50 | [Kensing](https://www.tamtam.ai/c/kensing) (kensingsolutions.com)<br>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 | 🇺🇸 Kankakee | 216 | 2021 |

## 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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## The same list elsewhere

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Source: https://www.tamtam.ai/l/chemical-companies-illinois