| # | Company | Employees |
|---|---|---|
| 1 | 160,913 | |
| 2 | 28,273 | |
| 3 |
American Honda Motor Company, Inc.honda.com
Design and manufacture cars, trucks, advanced light jets, and mobility solutions focused on enhancing life potential and environmental responsibility. |
15,103 |
| 4 |
Riviancareers.rivian.com
Innovative team dedicated to challenging conventional thinking and seeking new solutions to protect the outdoors for future generations |
11,979 |
| 5 |
inDriveindrive.com
Global mobility platform offering urban services including ride-hailing, intercity transport, and delivery, challenging injustice through fair choices for communities. |
11,723 |
| 6 |
Lucid Motorslucidmotors.com
Innovative, luxury EV company focused on sustainability, efficiency, and design, offering a new generation of electric vehicles |
7,701 |
| 7 |
Mitsubishi Motorsmitsubishicars.com
Innovative team of dreamers, designers, and engineers challenge convention to create Mitsubishi vehicles with a relentless ambition for driving different |
5,586 |
| 8 | 4,712 | |
| 9 | 4,501 | |
| 10 |
Kia Americakia.com
A technology-rich product lineup of cars, SUVs, and alternative-powered vehicles with an industry-leading warranty program Headquarters in Irvine, California |
4,487 |
| 11 |
Yamaha Motor Corporation, USAyamaha-motor.com
A company that provides a wide range of products, from motorcycles to boats, aiming to enhance customers' experiences and contribute to their quality of life |
3,718 |
| 12 |
Los Angeles Metrometro.net
The company serves as a transportation planner, coordinator, designer, builder, and operator for a large county with over 96 million residents |
3,638 |
| 13 | 2,713 | |
| 14 |
BizLink Groupbizlinktech.com
Manufacture and supply wire harnesses, connectors, and cables for ICT, electronics, healthcare, transportation, and industrial automation sectors worldwide. |
2,601 |
| 15 |
Mazda North American Operationsmazdausa.com
Design, manufacture, and sell vehicles worldwide, focusing on driver experience, combining tradition, versatility, refinement, and power. |
2,251 |
| 16 |
Symphony Telecaharman.com
This company designs connected products and solutions for consumers, automakers, and enterprises worldwide, specializing in audio, visual, infotainment systems, and software services |
2,153 |
| 17 |
Suzuki Motor of America, Inc.suzuki.com
A team of product enthusiasts committed to providing quality and innovative products, with a focus on ethical business practices and integrity Emphasis on fostering a fun work environment |
2,131 |
| 18 |
Joby Aviationjobyaviation.com
California-based company developing quiet, all-electric aircraft for vertical takeoff/landing, revolutionizing transportation with reduced acoustic and climate impact |
2,088 |
| 19 |
Good Powered by BlackBerryblackberry.com
Provider of secure mobile solutions including device management, collaboration apps, and analytics for enterprises and governments worldwide. |
2,065 |
| 20 |
Toyo Tirestoyotires.com
Leading tire manufacturing company with a global presence, priding itself on innovation, quality, and service, offering exciting career opportunities worldwide |
1,874 |
| 21 |
Boydboydcorp.com
The company specializes in designing and manufacturing advanced engineered materials and thermal management solutions for various industries, promoting innovation and empowerment |
1,858 |
| 22 | 1,781 | |
| 23 |
Kawasaki Motors Corp., U.S.A.kawasaki.com
Marketing and distributing motorcycles, ATVs, watercraft, and engines through extensive retailer networks, supporting motorsports and customer service excellence. |
1,716 |
| 24 |
Rivian and Volkswagen Group Technologiesrivianvw.tech
Development of advanced software and connectivity solutions for electric vehicles, including operating systems and zonal controllers, setting industry standards. |
1,627 |
| 25 |
Applied Intuitionappliedintuition.com
Vehicle software supplier accelerating safe and intelligent machines globally through simulation and validation platforms for automotive, trucking, and construction industries Headquarters in CA |
1,593 |
| 26 | 1,440 | |
| 27 |
Utility Trailer Manufacturing Companyutilitytrailer.com
Designs and manufactures dry freight vans, flatbeds, refrigerated trailers, and provides ultra-low emissions refrigeration units and telematics solutions. |
1,359 |
| 28 | 1,120 | |
| 29 |
Uber Advanced Technologies Groupuber.com
A research and development hub focused on self-driving technologies, mapping, and vehicle safety to advance safe transportation worldwide |
1,098 |
| 30 |
Yummypideyummy.app.link
This company in Venezuela offers a popular delivery and transportation app where users can order rides, deliveries, and event tickets |
1,063 |
| 31 |
WeDriveUwedriveu.com
The company specializes in corporate, university, and hospital shuttle programs, serving millions of passengers in various cities, focusing on commuting excellence and sustainability |
1,060 |
| 32 |
MNC Engineering LLCmnc-engineering.com
Engineering company developing high efficiency Internal Combustion Engines, led by 4 founders with US patent and pending PCT for innovative Spark Ignition Engine Seeking investors |
1,010 |
| 33 |
SMK Electronics USAsmkusa.com
A manufacturing company with ISO certifications in quality, environmental, and automotive management, based in Tijuana, Mexico, offering sales, service, and distribution globally |
983 |
| 34 | 951 | |
| 35 |
Hyundai Transleadhyundaitranslead.com
A leading manufacturer of dry and refrigerated van trailers, domestic containers, container chassis, and converter dollies for the North American transportation industry |
950 |
| 36 |
Isuzu North Americaisuzu.com
A global leader in commercial vehicles and diesel engines, focusing on innovative products, advanced performance, and superior customer support worldwide |
933 |
| 37 |
Mercedes-Benz Research & Development North America, Inc.mbrdna.com
Innovating premium mobility with cutting-edge technology, software, and groundbreaking innovation in areas such as autonomous driving, machine learning, and user experience |
784 |
| 38 |
Orange County Transportation Authorityocta.net
Primary transportation agency managing bus, rail, toll lanes, freeway improvements, road grants, vanpool subsidies, and rideshare options in Orange County. |
780 |
| 39 |
Trend Technologiestrendtechnologies.com
A global provider of mechanical solutions specializing in metal stamping, fabrication, and injection molding for Fortune 500 companies Local source with 10 manufacturing locations worldwide |
757 |
| 40 | 755 | |
| 41 |
Clarionww7.clarionus.com
A global leader in automotive electronics, specializing in audio, entertainment, navigation, cloud connectivity, and safety solutions for various industries |
742 |
| 42 |
K&N Engineeringknfilters.com
Global leader in manufacturing washable performance air filters and intake systems for cars, trucks, motorcycles, and industrial applications with worldwide distribution and innovative technology |
673 |
| 43 |
QuantumScapequantumscape.com
Innovating solid-state lithium-metal batteries for higher energy density, faster charging, and enhanced safety to facilitate the shift to a lower-carbon future |
665 |
| 44 |
Singer Vehicle Designsingervehicledesign.com
This company specializes in restoring, reimagining, and rebirthing unique and bespoke vehicles, particularly focusing on the air-cooled 911 model |
648 |
| 45 |
Telenavtelenav.com
A leading provider of connected car and location-based software, enabling automotive companies to deliver safe, convenient, and delightful in-vehicle digital experiences |
624 |
| 46 |
GILLIGgillig.com
Leading manufacturer of heavy-duty transit buses in the United States, offering clean energy propulsion systems built in California for public transportation. |
623 |
| 47 |
Zลซmridezum.com
Revolutionizing student transportation by managing vehicles, drivers, passengers, and rides on a single platform to improve the school transportation system |
566 |
| 48 |
Motorcar Parts of Americamotorcarparts.com
A remanufacturer, manufacturer, and distributor of automotive aftermarket parts, specializing in alternators, starters, and brake products for passenger and heavy-duty vehicles |
560 |
| 49 |
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. |
464 |
| 50 |
Phillips Industriesphillipsind.com
Leading innovator, manufacturer of advanced electrical, air brake system components for commercial truck, trailer industry, globally. Committed to eliminating costly downtime, repairs. |
296 |
| 51 |
Fiskerfiskerinc.com
An American company focused on developing sustainable electric vehicles with disruptive eMobility technologies for a clean future for all |
271 |
| 52 |
Aluminum Precision Productsaluminumprecision.com
Specializing in aluminum and titanium forging, assemblies, and open-die forgings, committed to continuous improvement and quality, serving aerospace, automotive, and other markets globally |
187 |
| 53 |
Ampureampure.com
A global technology partner specializing in electric vehicle chargers, sunroofs, and heating/cooling systems, dedicated to advancing electromobility with innovative solutions |
172 |
| 54 |
Ridecellridecell.com
The company specializes in fleet automation and mobility solutions, helping businesses achieve efficiency, control, and transparency through digital transformation |
167 |
| 55 |
Webasto Charging Systems, Inc.webasto-group.com
Global supplier of innovative eMobility solutions for the automotive industry, offering advanced battery systems, powerful charging solutions, and comprehensive energy management services |
166 |
| 56 |
Imagry | Autonomous Drivingimagry.co
Imagry provides mapless driving solutions for Level 3-4 autonomous vehicles using location-independent technology and bio-inspired methods with hi-res cameras |
149 |
| 57 |
Solar Gard Saint-Gobainsolargard.com
A global producer of advanced window films and protective coatings for architecture and automotive markets, enhancing lives with products that protect, save, and renew |
142 |
| 58 |
Xos Trucksxostrucks.com
Building state-of-the-art electric commercial vehicles including step vans, box trucks, and vocational vehicles, for greater fleet efficiency and lower operating costs. |
141 |
| 59 |
Beam Globalbeamforall.com
Clean technology innovator specializing in sustainable infrastructure products, EV charging solutions, energy storage, and energy security to power transportation and protect the environment |
97 |
| 60 |
Del West USAdel-west.com
A leading manufacturer of high-end precision products for various industries, known for in-house creation, design, and manufacture processes to enhance quality and responsiveness |
60 |
| 61 | 56 | |
| 62 |
United Pacific Industries, Inc.upauto.com
Industry leader in designing, manufacturing, and supplying heavy-duty trucks and vintage vehicle parts with 40 years of experience Committed to world-class customer service |
44 |
| 63 |
Speedmaster โขspeedmaster79.com
A global leader in aftermarket automotive components, specializing in high performance engine parts and manufacturing unique DNA items |
41 |
| 64 |
Voom, an Airbus companyvoom.flights
A subsidiary of Airbus, Voom offers affordable helicopter flights to fly over traffic in urban areas like Sรฃo Paulo and San Francisco |
39 |
| 65 |
YTC America Inc. (YTCA)ytca.com
This company is a North American research center focusing on advanced materials, energy technologies, and next-generation vehicle-related information communication technology for global operations |
31 |
| 66 |
HyreCarhyrecar.com
A carsharing marketplace connecting gig economy drivers with vehicle owners and fleet operators, empowering both sides to benefit |
26 |
| 67 |
Lusida Products, Inc.lusidarubber.com
Specializing in manufacturing rubber, plastic, and metal components, the company is committed to excellence, innovation, and meeting the evolving needs of customers |
24 |
| 68 |
Scoot Networksbird.co
Innovative company offering shared electric vehicles through an app to reduce urban congestion, CO2 emissions, and provide zero-emission transportation solutions |
17 |
| 69 |
Mission Trading Company (MTC Parts)mtcparts.com
A global leader in manufacturing and importing high-quality aftermarket automotive parts from around the world, specializing in engine, suspension, electrical, and rubber components |
14 |
| 70 |
United Western Industries, Inc.uwi.us
A machinery company located in Fresno, CA, specializing in industrial equipment manufacturing and distribution within the United States |
14 |
| 71 |
Phenix Truck and Vanphenixtruckbodies.com
Automotive company located in Pomona, California, specializing in various automotive services and solutions for customers in the United States |
13 |
| 72 |
Current Wayscurrentways.com
A California-based global electric vehicle charging solution provider, utilizing cutting-edge power supply technology to reduce environmental pollution and create a greener world |
10 |
| 73 |
AGC Business Development Americasagc.com
A global company manufacturing glass products for architecture, automotive, display, and expanding into semiconductor, electronics, chemicals, lifescience, and ceramics Operating as AGC Business Development Americas in the US |
7 |
| 74 |
Punch Press Products, Inc.pppsteel.com
A metal stamping company in California with extensive capabilities including design, welding, assembly, machining, and tooling for various materials |
6 |
| 75 |
Bisimoto Engineeringbisimoto.com
A leader in high performance automotive parts design and engineering, specializing in Porsche and OE manufacturers for race, tuning, and brand marketing |
4 |
| 76 |
Bestmilebestmile.com
Advanced algorithms automate and optimize fixed-route and on-demand transportation services for increased efficiency, reduced environmental impact, and improved profitability for mobility providers |
2 |
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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 Oct 24, 2026.
More company lists in California
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- SaaS companies in California 1,617
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- Venture capital and private equity firms in California 786
- IT Services and IT Consulting companies in California 730
- Venture Capital and Private Equity Principals companies in California 645
- AI companies in California 606
- AI-native companies in California 552
- Retail chains in California 527
- Hospitals and Health Care companies in California 519
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- Government Administration companies in California 279
- Healthcare providers in California 277
- Education Administration Programs companies in California 277
- Real Estate companies in California 275
The same list elsewhere in United States
- Automotive manufacturers and suppliers in the United States 736
- Automotive manufacturers and suppliers in Michigan 186
- Automotive manufacturers and suppliers in Ohio 58
- Automotive manufacturers and suppliers in Illinois 56
- Automotive manufacturers and suppliers in Indiana 47
- Automotive manufacturers and suppliers in Alabama 26
- Automotive manufacturers and suppliers in Auburn Hills 25