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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 42,789 | ||||
| 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 |
12,751 | |||
| 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 |
5,022 | |||
| 4 |
Amrizeamrize.com
Partner for professional builders offering advanced branded construction solutions across North America with extensive distribution and diverse market coverage. |
3,904 | |||
| 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. |
3,122 | |||
| 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. |
2,736 | |||
| 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 |
2,210 | |||
| 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 |
1,821 | |||
| 9 |
Pregispregis.com
Global provider of protective packaging materials and systems for consumer and industrial markets, with a focus on sustainability and innovation |
1,682 | |||
| 10 |
Rust-Oleum Corporationrustoleum.com
development and manufacturing of innovative, durable coatings and paints designed to protect surfaces from corrosion and transform appearances |
1,548 | |||
| 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 |
1,375 | |||
| 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 |
1,349 | |||
| 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 |
1,332 | |||
| 14 |
EPSepscca.com
This company provides high performance resins and colorants for coatings and adhesives industries, with a focus on customer success and innovation |
1,332 | |||
| 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 |
1,260 | |||
| 16 |
The AZEK Companyazekco.com
Design and manufacture sustainable, low-maintenance outdoor living products using recycled materials, including decking, railing, trim, and pergolas. |
1,177 | |||
| 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 |
1,107 | |||
| 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 |
987 | |||
| 19 |
Primientprimient.com
The company is a top producer of plant-based food and industrial ingredients, prioritizing safety, quality, and sustainability in their practices |
877 | |||
| 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. |
822 | |||
| 21 |
Vantage Specialty Chemicalsvantagegrp.com
Delivers natural chemical solutions, formulations, ingredients, and actives for diverse industries including personal care, food, agriculture, and pharmaceuticals. |
720 | |||
| 22 |
Century Aluminumcenturyaluminum.com
Primary aluminum production with operations in the US and Iceland, plus carbon anode manufacturing and alumina mining and refining. |
695 | |||
| 23 |
Ozingaozinga.com
A fourth-generation family-owned business providing concrete, materials, energy, and logistics solutions with a focus on quality, service, and community |
684 | |||
| 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 |
644 | |||
| 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 |
629 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 | 594 | ||||
| 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 |
594 | |||
| 28 |
CMC Materialsentegris.com
Specializes in materials and chemical solutions for semiconductor manufacturing, now integrated into Entegris for enhanced capabilities. |
559 | |||
| 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 |
555 | |||
| 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 |
550 | |||
| 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 |
507 | |||
| 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 |
407 | |||
| 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. |
388 | |||
| 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 |
372 | |||
| 35 |
PurposeBuilt Brandspurposebuiltbrands.com
A leading provider of high-performance products for specialty surfaces, serving both consumers and professionals across various industries nationwide |
337 | |||
| 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 |
337 | |||
| 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. |
335 | |||
| 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 |
325 | |||
| 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 |
322 | |||
| 40 |
Advancion Corporationadvancionsciences.com
This company innovates materials and ingredients for essential industries, enriching lives and enabling customers to advance the world |
275 | |||
| 41 |
Hallstarhallstar.com
specializes in ester chemistry to develop innovative products and solutions for beauty, personal care, and industrial markets globally. |
274 | |||
| 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 |
269 | |||
| 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 |
262 | |||
| 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 |
261 | |||
| 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 |
250 | |||
| 46 |
Citgo Petroleum Corporationcitgo.com
An oil & energy company located in Romeoville, Illinois, specializing in petroleum products and services for businesses and consumers |
239 | |||
| 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 |
234 | |||
| 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 |
226 | |||
| 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 |
222 | |||
| 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 |
216 | |||
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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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The same list elsewhere in United States
- Chemical companies in the United States 1,383
- Chemical companies in Texas 140
- Chemical companies in Ohio 120
- Chemical companies in California 112
- Chemical companies in Pennsylvania 95
- Chemical companies in New York State 61
- Chemical companies in Michigan 58
- Chemical companies in North Carolina 54
- Chemical companies in Georgia 51
- Chemical companies in New Jersey 51
- Chemical companies in Massachusetts 38
- Chemical companies in Indiana 34
- Chemical companies in Florida 33
- Chemical companies in Alabama 31
- Chemical companies in South Carolina 31
- Chemical companies in Wisconsin 31
- Chemical companies in Missouri 30
- Chemical companies in Minnesota 28
- Chemical companies in Tennessee 27
- Chemical companies in Connecticut 25
- Chemical companies in Houston 47