# List of chemical companies in California

Tamtam tracks 112 chemical companies headquartered in California. This list ranks the 50 largest by number of employees on LinkedIn, led by The Clorox Company, Behr Paint Company and Kemin Industries. Their median headcount is 419. Half of them were founded in 1973 or later. The most common headquarters are San Diego (8), Irvine (2) and Oakland (2).

This selection of large chemical companies in California shows a mix of manufacturing and biotechnology research firms. Companies like The Clorox Company, founded in 1913, specialize in household and personal care brands, while Behr Paint Company, established in 1947, manufactures paints and primers. Kyocera International, Inc. provides high-tech products, and Amyris, founded in 2003, focuses on biomanufacturing for flavors and fragrances. Dunn-Edwards Corporation produces architectural coatings, and WD-40 Company markets maintenance and homecare products.

The headquarters are distributed across various cities, with a notable presence in Southern California, including Santa Ana, San Diego, and Los Angeles. There is also a cluster of older, established companies founded in the early to mid-20th century, alongside more recent biotechnology firms.

🇺🇸 California · 50 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [The Clorox Company](https://www.tamtam.ai/c/the-clorox-company) (thecloroxcompany.com)<br>Manufactures and markets trusted household and personal care brands focused on health, wellness, and sustainability leadership since 1913. | Manufacturing | 🇺🇸 Oakland | 8,131 | 1913 |
| 2 | [Behr Paint Company](https://www.tamtam.ai/c/behr-paint-company) (jobs.masco.com)<br>Manufactures paints, primers, stains, decorative finishes, and application products for DIYers, designers, and professional paint contractors in North America. | Manufacturing | 🇺🇸 Santa Ana | 2,819 | 1947 |
| 3 | [Kemin Industries](https://www.tamtam.ai/c/kemin-industries) (kemin.com)<br>Global manufacturer providing over 500 specialty ingredients for diverse industries including human health, animal feed, pet food, and crop technologies, improving quality of life. | Biotechnology Research | 🇺🇸 Des Moines | 2,221 | 1961 |
| 4 | [Boyd](https://www.tamtam.ai/c/boyd) (boydcorp.com)<br>The company specializes in designing and manufacturing advanced engineered materials and thermal management solutions for various industries, promoting innovation and empowerment | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Pleasanton | 1,858 | 1928 |
| 5 | [Kyocera International, Inc. (North America)](https://www.tamtam.ai/c/kyocera-international-inc-north-america) (americas.kyocera.com)<br>A leading provider of high-tech products for consumers and businesses including fine ceramics, semiconductor components, communication equipment, consumer products, and more | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 San Diego | 1,553 | 1969 |
| 6 | [CalPortland](https://www.tamtam.ai/c/calportland) (calportland.com)<br>A leading provider of building materials and construction solutions in the Western US and Canada, focusing on sustainability and renewable technologies | Wholesale Building Materials | 🇺🇸 Glendora | 1,300 | 1891 |
| 7 | [Dunn-Edwards Corporation](https://www.tamtam.ai/c/dunn-edwards-corporation) (dunnedwards.com)<br>A leading manufacturer in the Southwest, providing architectural and industrial coatings, paints, and painting supplies to professionals and quality-conscious consumers since 1925 | Chemical Manufacturing | 🇺🇸 Commerce | 1,270 | 1925 |
| 8 | [Teichert](https://www.tamtam.ai/c/teichert) (teichert.com)<br>A company founded in 1887 that provides construction services, infrastructure building, and construction materials while prioritizing environmental sustainability and community partnerships | Construction | 🇺🇸 Sacramento | 1,128 | 1887 |
| 9 | [Amyris](https://www.tamtam.ai/c/amyris) (amyris.com)<br>vertically integrated biomanufacturing company, specialty molecules for flavors, fragrances, materials, beauty, personal care, food, enhancing lives, protecting ecosystems | Biotechnology Research | 🇺🇸 Emeryville | 989 | 2003 |
| 10 | [WD-40 Company](https://www.tamtam.ai/c/wd-40-company) (wd40company.com)<br>Global company marketing and distributing high-quality maintenance and homecare products across diverse trade channels in over 176 countries worldwide. | Wholesale Chemical and Allied Products | 🇺🇸 San Diego | 955 | 1953 |
| 11 | [Auto-Chlor System](https://www.tamtam.ai/c/auto-chlor-system) (autochlor.com)<br>A trusted leader in quality cleaning solutions for various industries, including restaurants, bars, hospitality, and healthcare, with a focus on sustainability | Chemical Manufacturing | 🇺🇸 Mountain View | 863 | 1938 |
| 12 | [MP Biomedicals](https://www.tamtam.ai/c/mp-biomedicals) (mpbio.com)<br>Manufacture and supply over 55,000 life science, fine chemical, and diagnostic products with global distribution and quality certifications. | Biotechnology Research | 🇺🇸 Irvine | 677 | 1959 |
| 13 | [Phenomenex](https://www.tamtam.ai/c/phenomenex) (phenomenex.com)<br>A global technology leader developing innovative analytical chemistry solutions for researchers in various industries, accelerating science and improving global health and well-being | Biotechnology Research | 🇺🇸 Torrance | 668 | 1982 |
| 14 | [JM Eagle](https://www.tamtam.ai/c/jm-eagle) (jmeagle.com)<br>A leading manufacturer of high-grade PVC and HDPE pipes for various industries worldwide, committed to innovation, superior customer service, and environmental sustainability | Plastics Manufacturing | 🇺🇸 Los Angeles | 644 | 1982 |
| 15 | [Ferrotec](https://www.tamtam.ai/c/ferrotec) (ferrotec.com)<br>Global leader in advanced technology solutions, manufacturing materials, components, and assembly solutions for various industries worldwide Headquartered in Tokyo, Japan | Semiconductor Manufacturing | 🇺🇸 Livermore | 636 | 1980 |
| 16 | [Custom Building Products](https://www.tamtam.ai/c/custom-building-products) (custombuildingproducts.com)<br>Leader in flooring preparation products and tile installation systems for residential and commercial projects, offering popular and trusted brands to industry professionals | Wholesale Building Materials | 🇺🇸 Santa Fe Springs | 616 | 1964 |
| 17 | [CND](https://www.tamtam.ai/c/cnd) (cnd.com)<br>A pioneer in professional nail products, based in San Diego, CA, known for CND™ SHELLAC™ Gel Polish, offering high-performance colors and innovative technology | Personal Care Product Manufacturing | 🇺🇸 San Diego | 590 | 1979 |
| 18 | [IPS Corporation](https://www.tamtam.ai/c/ips-corporation) (ipscorp.com)<br>Manufacturer of professional-grade solvent cements, sealants, adhesives, and plumbing products for industrial and commercial use, providing reliable solutions for contractors and fabricators | Wholesale Building Materials | 🇺🇸 Compton | 549 | 1954 |
| 19 | [Carbon](https://www.tamtam.ai/c/carbon-redwood-city) (carbon3d.com)<br>Rapidly design, develop, and scale production of better products using integrated materials, software, and 3D printers, accelerating market delivery. | Manufacturing | 🇺🇸 Redwood City | 522 | 2013 |
| 20 | [MOMENTIVE PERFORMANCE MATERIALS](https://www.tamtam.ai/c/momentive-performance-materials)<br>A California-based chemicals company specializing in performance materials, serving various industries with innovative solutions and high-quality products | Chemical Manufacturing | 🇺🇸 Santa Fe Springs | 515 |  |
| 21 | [AMPAC Fine Chemicals](https://www.tamtam.ai/c/ampac-fine-chemicals) (ampacfinechemicals.com)<br>United States-based custom manufacturer of active pharmaceutical ingredients and registered intermediates, solving problems through technology to deliver quality products for saving and improving lives. | Pharmaceutical Manufacturing | 🇺🇸 Rancho Cordova | 466 |  |
| 22 | [Toray Advanced Composites](https://www.tamtam.ai/c/toray-advanced-composites) (toraytac.com)<br>Develops and manufactures advanced composite material solutions for aerospace, satellite, communications, and industrial markets, offering world-class products and technical support. | Chemical Manufacturing | 🇺🇸 Morgan Hill | 464 |  |
| 23 | [Garratt-Callahan Company](https://www.tamtam.ai/c/garratt-callahan-company) (garrattcallahan.com)<br>Provider of industrial water treatment solutions including boiler, cooling, and wastewater treatment, with a focus on system optimization and water safety training | Chemical Manufacturing | 🇺🇸 Burlingame | 463 | 1904 |
| 24 | [Lyten](https://www.tamtam.ai/c/lyten) (lyten.com)<br>Manufactures lithium-sulfur batteries and 3D graphene supermaterials for energy storage, data centers, defense operations, and lower-carbon construction applications using domestic supply chains. | Manufacturing | 🇺🇸 San Jose | 452 | 2015 |
| 25 | [Sila Nanotechnologies, Inc.](https://www.tamtam.ai/c/sila-nanotechnologies-inc) (silanano.com)<br>This company engineers next-gen battery materials to increase energy density, accelerate energy transformation, and support the electrification of consumer electronics and EVs | Climate Technology Product Manufacturing | 🇺🇸 Alameda | 419 | 2011 |
| 26 | [Argen Corporation](https://www.tamtam.ai/c/argen-corporation) (argen.com)<br>Global leader supporting dental laboratories in 105+ countries, committed to laboratory success as a partner rather than a competitor. | Medical Equipment Manufacturing | 🇺🇸 San Diego | 411 |  |
| 27 | [Valence Surface Technologies](https://www.tamtam.ai/c/valence-surface-technologies) (valencesurfacetech.com)<br>Global metal finishing provider offering a comprehensive range of services for high-value aerospace parts with 8 centers of excellence in North America | Aviation and Aerospace Component Manufacturing | 🇺🇸 El Segundo | 405 | 2013 |
| 28 | [Ceramic Pro](https://www.tamtam.ai/c/ceramic-pro) (ceramicpro.com)<br>Global leader in nano ceramic protection solutions for vehicles, offering advanced coatings, paint protection films, and window films with a focus on innovation and excellence Trusted by professionals worldwide | Motor Vehicle Manufacturing | 🇺🇸 San Diego | 395 | 2003 |
| 29 | [AMVAC U.S.](https://www.tamtam.ai/c/amvac-u-s) (amvac.com)<br>A leading agricultural solutions provider committed to technology, innovation, and sustainability, focusing on proven chemistries, precision agriculture, GreenSolutions™, and sustainability solutions | Agricultural Chemical Manufacturing | 🇺🇸 Newport Beach | 393 |  |
| 30 | [The Gill Corporation](https://www.tamtam.ai/c/the-gill-corporation) (thegillcorp.com)<br>Manufacture high-performance composite materials and products including honeycomb panels, specialty laminates, CNC machined parts, and fabricated assemblies for aerospace and transportation industries. | Aviation and Aerospace Component Manufacturing | 🇺🇸 El Monte | 387 | 1945 |
| 31 | [Diamond Foundry](https://www.tamtam.ai/c/diamond-foundry) (df.com)<br>Production of single-crystal diamonds using zero-emission energy, enabling advanced electronics and sustainable alternatives to mined diamonds. | Semiconductor Manufacturing | 🇺🇸 San Francisco | 357 | 2013 |
| 32 | [CTC Global](https://www.tamtam.ai/c/ctc-global) (ctcglobal.com)<br>Global industry leader in composite core technology for power grids, offering innovative solutions for utilities worldwide, enabling fast, cost-effective, and environmentally friendly grid expansion | Manufacturing | 🇺🇸 Irvine | 349 | 2003 |
| 33 | [NuSil Technology, LLC](https://www.tamtam.ai/c/nusil-technology-llc) (nusil.avantorsciences.com)<br>A global leader in ultra-high-purity materials for biomaterials and advanced technology markets, offering medical and space-grade silicones for over 35 years | Chemical Manufacturing | 🇺🇸 Carpinteria | 343 |  |
| 34 | [HCT by kdc/one](https://www.tamtam.ai/c/hct-by-kdc-one) (hctgroup.com)<br>Global provider of innovative packaging, formulation, and product development solutions for beauty, personal care, and home care industries. | Personal Care Product Manufacturing | 🇺🇸 Santa Monica | 332 | 1992 |
| 35 | [Gallo Glass Company](https://www.tamtam.ai/c/gallo-glass-company) (galloglass.com)<br>A California-based glass manufacturer specializing in sustainable and high-quality glass production for the wine & spirits industry, with a focus on environmental impact mitigation | Packaging and Containers Manufacturing | 🇺🇸 Modesto | 322 | 1958 |
| 36 | [Rhino Linings Corporation](https://www.tamtam.ai/c/rhino-linings-corporation) (rhinolinings.com)<br>A world leader in sprayed and rolled coatings and linings for industrial, municipal, and residential applications with a global network of applicators | Chemical Manufacturing | 🇺🇸 San Diego | 311 | 1988 |
| 37 | [Arlon Graphics](https://www.tamtam.ai/c/arlon-graphics) (arlon.com)<br>Manufacturing high-quality cast vinyl graphic films for various markets worldwide, providing innovative material solutions for visual expression through distribution partners and customer-centric operations | Plastics Manufacturing | 🇺🇸 Placentia | 302 | 1958 |
| 38 | [JSR Micro, Inc.](https://www.tamtam.ai/c/jsr-micro-inc) (jsrmicro.com)<br>A global provider of innovative semiconductor, life sciences, and energy materials, leveraging polymer expertise to address unique challenges across industries | Semiconductor Manufacturing | 🇺🇸 Sunnyvale | 266 | 1957 |
| 39 | [Eagle Roofing Products](https://www.tamtam.ai/c/eagle-roofing-products) (eagleroofing.com)<br>An American manufacturer of quality concrete roof tiles with a wide color selection, focusing on green solutions for increased curb appeal and energy savings worldwide | Wholesale Building Materials | 🇺🇸 Rialto | 249 | 1989 |
| 40 | [C-Hawk Technology Int'l](https://www.tamtam.ai/c/c-hawk-technology-int-l) (c-hawk.com)<br>This company specializes in manufacturing plastic components and module assembly for various industries, with a focus on advanced technology and global presence | Plastics Manufacturing | 🇺🇸 Hayward | 233 | 2006 |
| 41 | [Professional Plastics](https://www.tamtam.ai/c/professional-plastics) (professionalplastics.com)<br>Global leader in fabrication and distribution of high-performance plastics, offering a wide range of plastic products and parts with a strong worldwide network | Plastics Manufacturing | 🇺🇸 Fullerton | 232 | 1984 |
| 42 | [Geno](https://www.tamtam.ai/c/geno) (genomatica.com)<br>Accelerates world's transformation to sustainable materials, replacing fossil fuels with plants. Creates molecules, ingredients, materials from sustainable sources. Powers high-performance for brands. | Biotechnology Research | 🇺🇸 San Diego | 232 | 2000 |
| 43 | [Rock West Composites](https://www.tamtam.ai/c/rock-west-composites) (rockwestcomposites.com)<br>Designs, engineers, and manufactures quality composite products using various techniques, ensuring superior value and customer satisfaction with experienced personnel. | Aviation and Aerospace Component Manufacturing | 🇺🇸 San Diego | 209 | 2009 |
| 44 | [kdc/one Chatsworth](https://www.tamtam.ai/c/kdc-one-chatsworth) (kdc-one.com)<br>This company specializes in developing innovative skincare, haircare, and bath & body products using patented multi-fill technology and exclusive packaging solutions | Manufacturing | 🇺🇸 Chatsworth | 205 | 1973 |
| 45 | [Airtech Advanced Materials Group](https://www.tamtam.ai/c/airtech-advanced-materials-group) (airtech.com)<br>Global supplier of composite tooling, vacuum bagging, lightweight architectural, and additive manufacturing materials for diverse industries. | Manufacturing | 🇺🇸 Huntington Beach | 202 | 1973 |
| 46 | [Lilac](https://www.tamtam.ai/c/lilac) (lilacsolutions.com)<br>A lithium extraction company located in Oakland, California, specializing in innovative solutions for lithium production | Mining | 🇺🇸 Oakland | 202 | 2016 |
| 47 | [FRALOCK](https://www.tamtam.ai/c/fralock) (fralock.com)<br>Innovative manufacturer of engineered solutions for High Reliability applications in various industries, specializing in CIRLEX® polyimide materials, flexible circuits, and technical ceramics | Manufacturing | 🇺🇸 Valencia | 190 | 1967 |
| 48 | [Teknova](https://www.tamtam.ai/c/teknova) (teknova.com)<br>Innovates manufacturing critical reagents, offering customizable solutions for cell and gene therapy, molecular diagnostics, and synthetic biology, accelerating discovery and development of novel therapies. | Biotechnology Research | 🇺🇸 Hollister | 184 | 1996 |
| 49 | [Kirkhill, Inc.](https://www.tamtam.ai/c/kirkhill-inc) (kirkhill.com)<br>Diversified manufacturer founded in 1919, specializing in precision silicone seals for aerospace, rocket insulation, and custom engineered products for various markets | Aviation and Aerospace Component Manufacturing | 🇺🇸 Brea | 183 | 1919 |
| 50 | [Ceradyne, Inc.](https://www.tamtam.ai/c/ceradyne-inc) (avon-technologiesplc.com)<br>A California-based company develops and manufactures advanced technical ceramic products for defense, industrial, energy, automotive, medical, and electronic markets worldwide | Glass, Ceramics and Concrete Manufacturing | 🇺🇸 Costa Mesa | 181 | 1967 |

## 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 13, 2026.

## More company lists in California

- [The largest companies in California](https://www.tamtam.ai/l/largest-companies-california) (15,259)
- [Multinational companies in California](https://www.tamtam.ai/l/multinational-companies-california) (2,587)
- [SaaS companies in California](https://www.tamtam.ai/l/saas-companies-california) (1,854)
- [Software Development companies in California](https://www.tamtam.ai/l/software-development-companies-california) (1,649)
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- [Manufacturers in California](https://www.tamtam.ai/l/manufacturers-california) (1,065)
- [Hardware manufacturers in California](https://www.tamtam.ai/l/hardware-companies-california) (984)
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- [Venture capital and private equity firms in California](https://www.tamtam.ai/l/vc-and-private-equity-firms-california) (917)
- [Professional services firms in California](https://www.tamtam.ai/l/professional-services-firms-california) (880)
- [Companies with a mobile app in California](https://www.tamtam.ai/l/companies-with-mobile-app-california) (827)
- [Retail chains in California](https://www.tamtam.ai/l/retail-chains-california) (802)
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- [Financial Services companies in California](https://www.tamtam.ai/l/financial-services-companies-california) (642)
- [Healthcare providers in California](https://www.tamtam.ai/l/healthcare-providers-california) (569)
- [AI-native companies in California](https://www.tamtam.ai/l/ai-native-companies-california) (561)
- [Hospitals and Health Care companies in California](https://www.tamtam.ai/l/hospitals-and-health-care-companies-california) (555)
- [Consulting firms in California](https://www.tamtam.ai/l/consulting-firms-california) (551)
- [Public sector organisations in California](https://www.tamtam.ai/l/public-sector-organisations-california) (536)

## The same list elsewhere in United States

- [Chemical companies in the United States](https://www.tamtam.ai/l/chemical-companies-united-states) (1,383)
- [Chemical companies in Texas](https://www.tamtam.ai/l/chemical-companies-texas) (140)
- [Chemical companies in Ohio](https://www.tamtam.ai/l/chemical-companies-ohio) (120)
- [Chemical companies in Pennsylvania](https://www.tamtam.ai/l/chemical-companies-pennsylvania) (95)
- [Chemical companies in Illinois](https://www.tamtam.ai/l/chemical-companies-illinois) (74)
- [Chemical companies in New York State](https://www.tamtam.ai/l/chemical-companies-new-york-state) (61)
- [Chemical companies in Michigan](https://www.tamtam.ai/l/chemical-companies-michigan) (58)
- [Chemical companies in North Carolina](https://www.tamtam.ai/l/chemical-companies-north-carolina) (54)
- [Chemical companies in Georgia](https://www.tamtam.ai/l/chemical-companies-georgia) (51)
- [Chemical companies in New Jersey](https://www.tamtam.ai/l/chemical-companies-new-jersey) (51)
- [Chemical companies in Massachusetts](https://www.tamtam.ai/l/chemical-companies-massachusetts) (38)
- [Chemical companies in Indiana](https://www.tamtam.ai/l/chemical-companies-indiana) (34)
- [Chemical companies in Florida](https://www.tamtam.ai/l/chemical-companies-florida) (33)
- [Chemical companies in Alabama](https://www.tamtam.ai/l/chemical-companies-alabama) (31)
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- [Chemical companies in Missouri](https://www.tamtam.ai/l/chemical-companies-missouri) (30)
- [Chemical companies in Minnesota](https://www.tamtam.ai/l/chemical-companies-minnesota) (28)
- [Chemical companies in Tennessee](https://www.tamtam.ai/l/chemical-companies-tennessee) (27)
- [Chemical companies in Connecticut](https://www.tamtam.ai/l/chemical-companies-connecticut) (25)
- [Chemical companies in Houston](https://www.tamtam.ai/l/chemical-companies-houston) (47)

## The same list elsewhere

- [Chemical companies in the world](https://www.tamtam.ai/l/chemical-companies-in-the-world) (6,500)
- [Chemical companies in North America](https://www.tamtam.ai/l/chemical-companies-in-north-america) (1,615)

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