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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).

๐Ÿ‡บ๐Ÿ‡ธ California50 companiesUpdated Nov 13, 2026

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.

#CompanyIndustryHeadquarters EmployeesFounded
1
The Clorox Companythecloroxcompany.com

Manufactures and markets trusted household and personal care brands focused on health, wellness, and sustainability leadership since 1913.

Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Oakland 8,131 1913
2
Behr Paint Companyjobs.masco.com

Manufactures paints, primers, stains, decorative finishes, and application products for DIYers, designers, and professional paint contractors in North America.

Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Santa Ana 2,819 1947
3
Kemin Industrieskemin.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Des Moines 2,221 1961
4
Boydboydcorp.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Pleasanton 1,858 1928
5
Kyocera International, Inc. (North America)americas.kyocera.com

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 ๐Ÿ‡บ๐Ÿ‡ธ San Diego 1,553 1969
6
CalPortlandcalportland.com

A leading provider of building materials and construction solutions in the Western US and Canada, focusing on sustainability and renewable technologies

Wholesale Building Materials ๐Ÿ‡บ๐Ÿ‡ธ Glendora 1,300 1891
7
Dunn-Edwards Corporationdunnedwards.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Commerce 1,270 1925
8
Teichertteichert.com

A company founded in 1887 that provides construction services, infrastructure building, and construction materials while prioritizing environmental sustainability and community partnerships

Construction ๐Ÿ‡บ๐Ÿ‡ธ Sacramento 1,128 1887
9
Amyrisamyris.com

vertically integrated biomanufacturing company, specialty molecules for flavors, fragrances, materials, beauty, personal care, food, enhancing lives, protecting ecosystems

Biotechnology Research ๐Ÿ‡บ๐Ÿ‡ธ Emeryville 989 2003
10
WD-40 Companywd40company.com

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 ๐Ÿ‡บ๐Ÿ‡ธ San Diego 955 1953
11
Auto-Chlor Systemautochlor.com

A trusted leader in quality cleaning solutions for various industries, including restaurants, bars, hospitality, and healthcare, with a focus on sustainability

Chemical Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Mountain View 863 1938
12
MP Biomedicalsmpbio.com

Manufacture and supply over 55,000 life science, fine chemical, and diagnostic products with global distribution and quality certifications.

Biotechnology Research ๐Ÿ‡บ๐Ÿ‡ธ Irvine 677 1959
13
Phenomenexphenomenex.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Torrance 668 1982
14
JM Eaglejmeagle.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Los Angeles 644 1982
15
Ferrotecferrotec.com

Global leader in advanced technology solutions, manufacturing materials, components, and assembly solutions for various industries worldwide Headquartered in Tokyo, Japan

Semiconductor Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Livermore 636 1980
16
Custom Building Productscustombuildingproducts.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Santa Fe Springs 616 1964
17
CNDcnd.com

A pioneer in professional nail products, based in San Diego, CA, known for CNDโ„ข SHELLACโ„ข Gel Polish, offering high-performance colors and innovative technology

Personal Care Product Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 590 1979
18
IPS Corporationipscorp.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Compton 549 1954
19
Carboncarbon3d.com

Rapidly design, develop, and scale production of better products using integrated materials, software, and 3D printers, accelerating market delivery.

Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Redwood City 522 2013
20
MOMENTIVE PERFORMANCE MATERIALS

A California-based chemicals company specializing in performance materials, serving various industries with innovative solutions and high-quality products

Chemical Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Santa Fe Springs 515 n/a
21
AMPAC Fine Chemicalsampacfinechemicals.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Rancho Cordova 466 n/a
22
Toray Advanced Compositestoraytac.com

Develops and manufactures advanced composite material solutions for aerospace, satellite, communications, and industrial markets, offering world-class products and technical support.

Chemical Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Morgan Hill 464 n/a
23
Garratt-Callahan Companygarrattcallahan.com

Provider of industrial water treatment solutions including boiler, cooling, and wastewater treatment, with a focus on system optimization and water safety training

Chemical Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Burlingame 463 1904
24
Lytenlyten.com

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 ๐Ÿ‡บ๐Ÿ‡ธ San Jose 452 2015
25
Sila Nanotechnologies, Inc.silanano.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Alameda 419 2011

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26
Argen Corporationargen.com

Global leader supporting dental laboratories in 105+ countries, committed to laboratory success as a partner rather than a competitor.

Medical Equipment Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 411 n/a
27
Valence Surface Technologiesvalencesurfacetech.com

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 ๐Ÿ‡บ๐Ÿ‡ธ El Segundo 405 2013
28
Ceramic Proceramicpro.com

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 ๐Ÿ‡บ๐Ÿ‡ธ San Diego 395 2003
29
AMVAC U.S.amvac.com

A leading agricultural solutions provider committed to technology, innovation, and sustainability, focusing on proven chemistries, precision agriculture, GreenSolutionsโ„ข, and sustainability solutions

Agricultural Chemical Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Newport Beach 393 n/a
30
The Gill Corporationthegillcorp.com

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 ๐Ÿ‡บ๐Ÿ‡ธ El Monte 387 1945
31
Diamond Foundrydf.com

Production of single-crystal diamonds using zero-emission energy, enabling advanced electronics and sustainable alternatives to mined diamonds.

Semiconductor Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Francisco 357 2013
32
CTC Globalctcglobal.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Irvine 349 2003
33
NuSil Technology, LLCnusil.avantorsciences.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Carpinteria 343 n/a
34
HCT by kdc/onehctgroup.com

Global provider of innovative packaging, formulation, and product development solutions for beauty, personal care, and home care industries.

Personal Care Product Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Santa Monica 332 1992
35
Gallo Glass Companygalloglass.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Modesto 322 1958
36
Rhino Linings Corporationrhinolinings.com

A world leader in sprayed and rolled coatings and linings for industrial, municipal, and residential applications with a global network of applicators

Chemical Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 311 1988
37
Arlon Graphicsarlon.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Placentia 302 1958
38
JSR Micro, Inc.jsrmicro.com

A global provider of innovative semiconductor, life sciences, and energy materials, leveraging polymer expertise to address unique challenges across industries

Semiconductor Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Sunnyvale 266 1957
39
Eagle Roofing Productseagleroofing.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Rialto 249 1989
40
C-Hawk Technology Int'lc-hawk.com

This company specializes in manufacturing plastic components and module assembly for various industries, with a focus on advanced technology and global presence

Plastics Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Hayward 233 2006
41
Professional Plasticsprofessionalplastics.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Fullerton 232 1984
42
Genogenomatica.com

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 ๐Ÿ‡บ๐Ÿ‡ธ San Diego 232 2000
43
Rock West Compositesrockwestcomposites.com

Designs, engineers, and manufactures quality composite products using various techniques, ensuring superior value and customer satisfaction with experienced personnel.

Aviation and Aerospace Component Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ San Diego 209 2009
44
kdc/one Chatsworthkdc-one.com

This company specializes in developing innovative skincare, haircare, and bath & body products using patented multi-fill technology and exclusive packaging solutions

Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Chatsworth 205 1973
45
Airtech Advanced Materials Groupairtech.com

Global supplier of composite tooling, vacuum bagging, lightweight architectural, and additive manufacturing materials for diverse industries.

Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Huntington Beach 202 1973
46
Lilaclilacsolutions.com

A lithium extraction company located in Oakland, California, specializing in innovative solutions for lithium production

Mining ๐Ÿ‡บ๐Ÿ‡ธ Oakland 202 2016
47
FRALOCKfralock.com

Innovative manufacturer of engineered solutions for High Reliability applications in various industries, specializing in CIRLEXยฎ polyimide materials, flexible circuits, and technical ceramics

Manufacturing ๐Ÿ‡บ๐Ÿ‡ธ Valencia 190 1967
48
Teknovateknova.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Hollister 184 1996
49
Kirkhill, Inc.kirkhill.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Brea 183 1919
50
Ceradyne, Inc.avon-technologiesplc.com

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 ๐Ÿ‡บ๐Ÿ‡ธ Costa Mesa 181 1967

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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 13, 2026.

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