# Top 31 chemical companies in Wisconsin

Tamtam tracks 31 chemical companies headquartered in Wisconsin. This list ranks all of them by number of employees on LinkedIn, led by Clarios, Sensient Technologies Corporation and PSSI. Their median headcount is 199. Half of them were founded in 1973 or later. The most common headquarters are Milwaukee (7) and Appleton (3).

This selection of companies in Wisconsin primarily includes mid-sized firms in manufacturing, with a strong presence in specialized industrial products. Clarios, with 6268 employees, produces advanced energy storage solutions, while Sensient Technologies Corporation develops specialized ingredients for various industries. PSSI provides food safety solutions, and ORBIS Corporation manufactures reusable plastic containers and pallets. Hydrite is an independent provider of chemicals and services, and MGS Mfg. Group offers healthcare manufacturing solutions.

Food and beverage manufacturing, along with plastics manufacturing, emerge as prominent sectors among these companies. Many of these firms, such as PSSI, ORBIS Corporation, and Hydrite, were founded in the mid-20th century, indicating a long-standing industrial base in the region. There is a notable concentration of headquarters in Milwaukee and Kieler.

🇺🇸 Wisconsin · 31 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Clarios](https://www.tamtam.ai/c/clarios) (clarios.com)<br>Global leader in advanced energy storage solutions, producing 150 million batteries annually for a third of the world's vehicles Expanding capacity to meet future demand | Motor Vehicle Parts Manufacturing | 🇺🇸 Glendale | 6,268 |  |
| 2 | [Sensient Technologies Corporation](https://www.tamtam.ai/c/sensient-technologies-corporation) (sensient.com)<br>Enhancing sensory experiences by developing specialized ingredients and technologies for colors, flavors, and extracts in industries worldwide | Food and Beverage Manufacturing | 🇺🇸 Milwaukee | 3,134 |  |
| 3 | [PSSI](https://www.tamtam.ai/c/pssi) (fortrexsolutions.com)<br>Provider of food safety solutions for food processing facilities, offering contract sanitation services, chemical innovations, pest prevention, and intervention solutions with skilled specialists | Food and Beverage Manufacturing | 🇺🇸 Kieler | 2,586 | 1973 |
| 4 | [ORBIS Corporation](https://www.tamtam.ai/c/orbis-corporation) (orbiscorporation.com)<br>Reusable plastic containers and pallets improve supply chain flow, reduce costs, enhance profitability, optimize operations, and promote sustainability. | Packaging and Containers Manufacturing | 🇺🇸 Oconomowoc | 1,729 | 1849 |
| 5 | [Packers Sanitation Services, Inc. (PSSI)](https://www.tamtam.ai/c/packers-sanitation-services-inc-pssi) (pssi.co)<br>This company specializes in food safety and provides information and resources to ensure the safety of food products for consumers | Food and Beverage Manufacturing | 🇺🇸 Kieler | 1,321 | 1973 |
| 6 | [AMSOIL INC.](https://www.tamtam.ai/c/amsoil-inc) (amsoil.com)<br>A company specializing in synthetic lubricants that provide exceptional wear protection, increased fuel efficiency, and overall performance for various vehicles and equipment | Oil and Gas | 🇺🇸 Superior | 980 |  |
| 7 | [Hydrite](https://www.tamtam.ai/c/hydrite) (hydrite.com)<br>Innovative independent provider of chemicals and services, focused on food safety, water treatment, manufacturing efficiency, and crop health, with strong community engagement | Chemical Manufacturing | 🇺🇸 Brookfield | 813 | 1929 |
| 8 | [MGS Mfg. Group](https://www.tamtam.ai/c/mgs-mfg-group) (mgsmfg.com)<br>Global provider of healthcare manufacturing solutions with vertically integrated capabilities from design to assembly, creating breakthrough innovations for Pharma, Diagnostic, and MedTech companies | Plastics Manufacturing | 🇺🇸 Germantown | 813 | 1982 |
| 9 | [Appvion](https://www.tamtam.ai/c/appvion) (appvion.com)<br>A sustainable specialty coating solutions company in Appleton, WI, known for direct thermal paper, film products, and renewable packaging solutions | Paper and Forest Product Manufacturing | 🇺🇸 Appleton | 626 | 1907 |
| 10 | [Flambeau, Inc.](https://www.tamtam.ai/c/flambeau-inc) (flambeau.com)<br>The company specializes in manufacturing a diverse range of plastic products, offering design assistance, tooling, contract manufacturing, and various retail divisions worldwide | Plastics Manufacturing | 🇺🇸 Baraboo | 553 | 1947 |
| 11 | [Pioneer Metal Finishing](https://www.tamtam.ai/c/pioneer-metal-finishing) (pioneermetal.com)<br>A metal finishing company offering a wide range of services across the US and Mexico, focused on value, quality, and customer relationships | Mining | 🇺🇸 Green Bay | 433 | 1945 |
| 12 | [Fisher Barton](https://www.tamtam.ai/c/fisher-barton) (fisherbarton.com)<br>A manufacturing innovation partner specializing in high-wear components, offering proprietary heat treating and thermal spray solutions for various industries | Machinery Manufacturing | 🇺🇸 Watertown | 233 | 1973 |
| 13 | [Hentzen Coatings](https://www.tamtam.ai/c/hentzen-coatings) (hentzen.com)<br>A leading independent paint company focused on developing environmentally friendly coatings, with expertise in reducing VOC emissions and providing technical support | Paint, Coating, and Adhesive Manufacturing | 🇺🇸 Milwaukee | 233 | 1923 |
| 14 | [Lucas Milhaupt](https://www.tamtam.ai/c/lucas-milhaupt) (lucasmilhaupt.com)<br>A global leader in the brazing industry, providing innovative metal joining solutions for various industries with a focus on quality, process efficiency, and customer support | Fabricated Metal Products | 🇺🇸 Milwaukee | 222 | 1942 |
| 15 | [SACO AEI Polymers](https://www.tamtam.ai/c/saco-aei-polymers) (sacoaei.com)<br>A technology-driven manufacturer providing innovative polymer solutions for various industries, focusing on quality, efficiency, and customer value with global facilities | Plastics Manufacturing | 🇺🇸 Sheboygan | 202 | 1997 |
| 16 | [Benz](https://www.tamtam.ai/c/benz) (amsoilindustrial.com)<br>Manufacturer of industrial lubricants and metalworking fluids providing technical support, testing, and customized solutions for operational efficiency. | Oil and Gas | 🇺🇸 Milwaukee | 199 | 1898 |
| 17 | [Nekoosa](https://www.tamtam.ai/c/nekoosa) (nekoosa.com)<br>Specializing in manufacturing high-quality print media substrates for commercial print and graphics markets, offering a diverse product portfolio with a focus on innovation and sustainability | Printing Services | 🇺🇸 Appleton | 181 | 2005 |
| 18 | [Sussex IM](https://www.tamtam.ai/c/sussex-im) (sussexim.com)<br>A custom injection molder and automated assembly company offering innovative solutions for molding, decorating, and assembly needs with a focus on value-added operations | Plastics Manufacturing | 🇺🇸 Sussex | 130 | 1977 |
| 19 | [Ritus Corporation](https://www.tamtam.ai/c/ritus-corporation) (ritus.com)<br>Specializing in custom-molded products for automotive, industrial, marine, and recreational markets, offering a wide range of rubber and plastic molding services | Plastics Manufacturing | 🇺🇸 Milwaukee | 119 | 1963 |
| 20 | [Kaysun Corporation](https://www.tamtam.ai/c/kaysun-corporation) (kaysun.com)<br>Specializing in highly engineered plastic products and assemblies, this company collaborates with clients to tackle complex applications with precision and innovation | Plastics Manufacturing | 🇺🇸 Manitowoc | 113 | 1947 |
| 21 | [Five Star Plastics](https://www.tamtam.ai/c/five-star-plastics) (five-star-plastics.com)<br>Plastics product development organization offering rapid tooling, prototyping, design/engineering solutions, urethane models, injection molding, welding, printing, assembly, with focus on customer service and quality | Plastics Manufacturing | 🇺🇸 Eau Claire | 75 | 2001 |
| 22 | [Essential Industries, Inc](https://www.tamtam.ai/c/essential-industries-inc) (essind.com)<br>A world leader in polymer innovation and floor care technology, specializing in customized chemistries for various industries and customer specifications | Chemical Manufacturing | 🇺🇸 Merton | 73 |  |
| 23 | [Interfacial](https://www.tamtam.ai/c/interfacial) (ifllc.com)<br>A leader in developing advanced materials and manufacturing processes for various markets, offering services in development, specialty materials, and engineered substrates | Plastics Manufacturing | 🇺🇸 Prescott | 62 | 2003 |
| 24 | [Sintex Wausaukee Composites, Inc.](https://www.tamtam.ai/c/sintex-wausaukee-composites-inc) (wauscomp.com)<br>Manufacturer of composite plastic components for OEM customers in various industries, offering design, prototyping, manufacturing, and assembly services with a focus on excellence and innovation | Plastics Manufacturing | 🇺🇸 Wausaukee | 41 | 2008 |
| 25 | [Vision Plastics, Inc.](https://www.tamtam.ai/c/vision-plastics-inc) (visionplastics.net)<br>Vision Plastics provides high-quality plastic injection molded parts to various industries, offering design engineering assistance, mold maintenance, secondary operations, and quality assurance solutions | Plastics Manufacturing | 🇺🇸 Delavan | 40 | 1997 |
| 26 | [Seljan Company](https://www.tamtam.ai/c/seljan-company) (seljan.com)<br>A family-owned manufacturing company specializing in stamping, fabrication, rotational molding, injection molding, and more with a focus on customer service | Plastics Manufacturing | 🇺🇸 Lake Mills | 31 | 1967 |
| 27 | [Eagle Performance Plastics, Inc.](https://www.tamtam.ai/c/eagle-performance-plastics-inc) (eagle-plastics.com)<br>A leading supplier of custom-machined plastic components for various industries, offering precision CNC machining and fabrication services with a focus on quality and reliability | Plastics Manufacturing | 🇺🇸 Appleton | 31 | 1971 |
| 28 | [Cornerstone Composites](https://www.tamtam.ai/c/cornerstone-composites) (cornerstonecomposites.com)<br>The engineering team specializes in advancing products for manufacturers by creating customized composite formulations to replace metal and thermoplastic parts | Industrial Machinery Manufacturing | 🇺🇸 Milwaukee | 29 | 2015 |
| 29 | [Plasticraft Corporation](https://www.tamtam.ai/c/plasticraft-corporation) (plasticraftcorp.com)<br>Specializing in injection molded parts and assemblies, we strive to deliver high-quality plastic components and ensure precision in our work | Plastics Manufacturing | 🇺🇸 Darien | 21 |  |
| 30 | [Kracor, a division of Yamaha Marine Systems Company, Inc.](https://www.tamtam.ai/c/kracor-a-division-of-yamaha-marine-systems-company-inc) (kracor.com)<br>Manufacturer of high-quality rotational molded plastic products for various industries, known for innovative design, advanced technology, and exceptional customer service | Plastics Manufacturing | 🇺🇸 Milwaukee | 13 |  |
| 31 | [R.A.D. Group](https://www.tamtam.ai/c/r-a-d-group) (radgroupinc.com)<br>A molding company specializing in silicone, rubber, and plastic components, offering a wide range of process options and serving various industries with quality parts and assemblies | Plastics Manufacturing | 🇺🇸 Racine | 5 | 2003 |

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