These are the largest companies in the United States with in-house research and development. They represent a diverse range of industries, primarily large corporations. The list includes technology giants, retail, professional services, and entertainment.
Among them are Amazon, an e-commerce giant; Deloitte, a global professional services firm; The Home Depot, a specialty retailer; and Cognizant, which helps clients modernize technology. A notable pattern is the strong presence of technology and IT services companies, with a significant number of headquarters located in California.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Amazonamazon.com
An e-commerce giant offering a vast selection of products, convenient shopping experiences, and fast delivery, connecting buyers with a wide range of sellers |
1,541,000 | |||
| 2 |
Deloittedeloitte.com
Global professional services firm empowering diverse talents to drive progress for clients worldwide through advice, action, and integrity |
526,765 | |||
| 3 |
The Home Depothomedepot.com
World's largest specialty retailer providing home improvement products and services through over 2,300 stores across North America to help customers build and renovate. |
491,000 | |||
| 4 |
Cognizantcognizant.com
This company helps clients modernize technology, reimagine processes, and transform experiences to stay ahead in a rapidly changing world, improving everyday life |
372,148 | |||
| 5 | 335,625 | ||||
| 6 |
Googlegoogle.com
Provides a powerful search engine, web services, and advertising tools to help users find information and businesses reach customers |
304,428 | |||
| 7 |
McDonald'scorporate.mcdonalds.com
global fast-food restaurant chain operating over 37,000 locations worldwide, serving popular menu items and employing 1.9 million people |
261,219 | |||
| 8 | 250,000 | ||||
| 9 |
Microsoftmicrosoft.com
Develops and sells software, hardware, and cloud services, including the Windows operating system and Office suite, to improve productivity and digital experiences |
233,562 | |||
| 10 |
The Walt Disney Companythewaltdisneycompany.com
An entertainment company creating magical experiences through animated features, theme park attractions, sports coverage, and television shows for global audiences |
220,000 | |||
| 11 |
Oracleoracle.com
Delivers cloud infrastructure, data, and applications for AI, offering scalable solutions for various deployments, integrating AI into databases, data platforms, and business applications. |
206,235 | |||
| 12 | 193,793 | ||||
| 13 |
Comcastcomcast.com
Delivering broadband, mobile, and video products, along with entertainment, sports, news, and theme park experiences; driven by passionate creators and innovators |
189,000 | |||
| 14 | 187,000 | ||||
| 15 | 184,384 | ||||
| 16 |
Ford Motor Companyford.com
Revolutionizing transportation with iconic and innovative connected electric vehicles, dedicated to serving customers, communities, and the planet for a better future |
169,414 | |||
| 17 | 164,418 | ||||
| 18 | 160,913 | ||||
| 19 |
University of Californiajobs.universityofcalifornia.edu
Educating top minds, advancing research, engaging communities, supporting economy, improving health, protecting environment, and driving innovation across California. |
152,503 | |||
| 20 |
HCA Healthcaredpxmedcity.net
A healthcare organization with 186 hospitals and 2,300 sites, focused on providing quality care, advancing science, and impacting communities positively |
150,409 | |||
| 21 |
Amazon Web Services (AWS)amazon.com
A global cloud computing provider offering scalable, reliable, and cost-effective infrastructure services to businesses worldwide, eliminating the need for capital infrastructure expenses |
147,090 | |||
| 22 |
Johnson&Johnsonjnj.com
Largest, most broadly based healthcare company, producing life-changing breakthroughs, creating digital health tools, 3-D printing artificial joints, and discovering lifesaving drugs. |
145,000 | |||
| 23 | 142,944 | ||||
| 24 |
Abbottabbott.com
A global healthcare leader offering life-changing technologies in diagnostics, medical devices, nutrition, and generic medicines, with over 115,000 colleagues serving in 160+ countries |
140,778 | |||
| 25 |
PepsiCopepsico.com
A global company championing innovation, creating deep connections with iconic brands, and empowering employees to make a global impact for a better world |
140,098 | |||
| 26 | 139,657 | ||||
| 27 |
Kaiser Permanentehealthy.kaiserpermanente.org
Leading not-for-profit health plan with a unique business model driving industry improvements, serving millions of members across multiple states and impacting communities positively |
137,397 | |||
| 28 |
Honeywell Technologieshoneywell.com
a global automation company that provides services, solutions, and products for building, industrial, and process sectors, focusing on automation to autonomy. |
134,559 | |||
| 29 |
Dell Technologiesdell.com
Provide essential technology infrastructure enabling organizations to transform and advance their digital futures through innovative solutions and support. |
133,530 | |||
| 30 |
Boeingboeing.com
A global aerospace leader providing commercial airplanes, defense, space systems, and services, focused on innovation, customer delivery, and employee growth |
129,130 | |||
| 31 |
Tesla Austria GmbHtesla.com
A company focused on accelerating the world's transition to sustainable energy through electric vehicles and clean energy generation and storage solutions |
128,000 | |||
| 32 |
Sikorsky Aircraft Corporationlockheedmartin.com
Global security and aerospace company providing integrated solutions and predictive technologies to keep customers ahead of threats through advanced technology systems and services |
115,000 | |||
| 33 |
YouTubeyoutube.com
Team-oriented, creative workplace within Google, developing and rolling out key features and products quickly Headquartered in San Bruno Opportunities globally |
113,401 | |||
| 34 | 109,404 | ||||
| 35 |
General Motorsgm.com
Development of safer, sustainable transportation technologies and solutions with a focus on inclusivity, innovation, and reducing crashes, emissions, and congestion. |
105,679 | |||
| 36 | 104,899 | ||||
| 37 |
Pfizerpfizer.com
A leading biopharmaceutical company focused on research and innovation to develop therapies that improve and extend the lives of patients worldwide |
102,598 | |||
| 38 |
Medtronicmedtronic.com
A healthcare technology company tackling challenging health issues worldwide with innovative solutions that significantly impact and improve lives |
100,323 | |||
| 39 |
Thermo Fisher Scientificthermofisher.com
A global leader in science services, providing innovative technologies and pharmaceutical support to make the world healthier, cleaner, and safer |
100,256 | |||
| 40 |
General Dynamics UKgd.com
A global company focusing on safety and security, producing a range of products from business jets to submarines with a culture of continuous improvement |
100,000 | |||
| 41 | 99,488 | ||||
| 42 |
Foxconnfoxconn.com
Global electronics manufacturer specializing in hardware, software, AI, semiconductors, and emerging technologies with extensive R&D and sustainability focus. |
98,833 | |||
| 43 | 98,830 | ||||
| 44 |
T-Mobilecareers.t-mobile.com
Leading US wireless provider delivering advanced 4G LTE and nationwide 5G networks, prioritizing customer value, service excellence, and innovation in Bellevue, Washington |
96,232 | |||
| 45 |
The Coca-Cola Companycoca-colacompany.com
A global beverage company selling popular brands in multiple categories, committed to sustainability, innovation, and making a positive impact worldwide |
96,000 | |||
| 46 | 95,899 | ||||
| 47 |
American Expressamericanexpress.com
A globally integrated payments company supporting customers' financial confidence, promoting commerce, and providing experiences that enrich lives and drive business success |
94,909 | |||
| 48 |
Procter & Gamblepg.com
Designs, develops, and sells a wide range of iconic consumer goods brands worldwide, improving daily life for billions of consumers through innovative products. |
92,610 | |||
| 49 |
TikToktiktok.com
A leading platform for short-form video, fostering creativity and innovation with a flat company structure and global presence for career growth opportunities |
91,370 | |||
| 50 |
Chick-fil-A Corporate Support Centerchick-fil-a.com
Company provides extensive support for restaurant operations including digital, financial, analytics, and development to ensure exceptional customer experiences globally. |
90,667 | |||
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. | |||||
| 51 |
Hewlett Packard Enterprisehpe.com
This company is a global edge-to-cloud company that drives technology and innovation to fulfill its passion and purpose |
90,021 | |||
| 52 |
Salesforcesalesforce.com
It provides customer relationship management solutions, integrating data, artificial intelligence, and a focus on trust to enhance customer experiences. |
86,347 | |||
| 53 |
Northrop Grummannorthropgrumman.com
Development of advanced technology solutions in autonomous systems, cyber, space, and defense to enhance global security and modernization. |
86,220 | |||
| 54 |
Capital Onecapitalone.com
Innovative bank focused on financial inclusion, creating tools to improve customers' lives, and encouraging a work-life balance for employees |
82,863 | |||
| 55 |
DoorDashcareersatdoordash.com
A tech and logistics company focused on empowering local economies through delivery services, with a mission to expand beyond food delivery |
80,754 | |||
| 56 | 80,633 | ||||
| 57 | 79,707 | ||||
| 58 |
Mondel膿z Internationalmondelezinternational.com
Global multinational manufacturing and marketing iconic snacks, biscuits, chocolate, candy, and gum brands including Oreo and Cadbury to empower people to snack right. |
79,000 | |||
| 59 |
Goldman Sachsgoldmansachs.com
Global financial institution providing expert capital markets services, investment banking, and asset management for clients through partnership, integrity, and world-class operational excellence. |
76,000 | |||
| 60 | 75,008 | ||||
| 61 |
Airbnbairbnb.com
The company offers unique stays and experiences worldwide through a platform connecting hosts with guests, fostering community connections |
72,938 | |||
| 62 |
GE Vernovalinktr.ee
A purpose-built company focused on electrifying the planet and decarbonizing it through a diverse portfolio of energy businesses, ensuring reliable and sustainable energy |
70,646 | |||
| 63 |
Cargillcargill.com
A family company providing food, ingredients, solutions, and products in a sustainable way Partnering with producers and customers for a better future |
69,086 | |||
| 64 |
Baker Hughesbakerhughes.com
Energy technology company providing innovative solutions globally, focusing on safety, efficiency, and sustainability in the energy and industrial sectors |
67,440 | |||
| 65 | 63,807 | ||||
| 66 |
Caterpillar Inc.caterpillar.com
A global leader in manufacturing construction and mining equipment, engines, turbines, and locomotives, focused on sustainability and providing value to customers worldwide |
62,810 | |||
| 67 | 61,367 | ||||
| 68 |
AbbVieabbvie.com
Global biopharmaceutical company focused on creating impactful medicines for complex health issues in immunology, oncology, neuroscience, eye care, aesthetics, and other unmet needs |
61,015 | |||
| 69 |
Halliburtonhalliburton.com
Collaborates to engineer solutions maximizing energy asset value, from locating hydrocarbons, managing data, drilling, evaluating, and constructing wells, to optimizing production. |
60,277 | |||
| 70 |
GE HealthCaregehealthcare.com
Global medical technology and digital solutions innovator leveraging intelligent devices, data analytics, and artificial intelligence to drive precision health and improve patient outcomes worldwide |
60,041 | |||
| 71 |
Cummins Inc.cummins.com
empowering diverse professionals through career growth, innovation, and development in engineering, manufacturing, marketing, and supply chain roles worldwide |
60,000 | |||
| 72 |
The Est茅e Lauder Companies Inc.elcompanies.com
A global leader in skincare, makeup, fragrance, and hair care, offering luxury brands sold in 150+ countries, with a diverse product portfolio |
60,000 | |||
| 73 | 57,548 | ||||
| 74 |
Eli Lilly and Companylilly.com
A pharmaceutical company dedicated to discovering medicines, improving disease management, and giving back to communities through philanthropy and volunteerism |
56,750 | |||
| 75 |
Northwell Healthnorthwell.edu
Largest New York healthcare system with hospitals, outpatient facilities, research institutes, medical education, and extensive patient care services. |
56,405 | |||
| 76 |
Carrier Corporationcarrier.com
Global provider of sustainable climate and energy solutions, enhancing comfort, safety, and efficiency in buildings and transportation worldwide. |
56,000 | |||
| 77 |
Parker Hannifinparker.com
Global leader in motion and control technologies, enabling engineering breakthroughs for a better tomorrow Diversified company providing vital products for various industries worldwide |
56,000 | |||
| 78 | 55,984 | ||||
| 79 | 55,736 | ||||
| 80 | 55,654 | ||||
| 81 |
John Deeredeere.com
A global leader in cutting-edge products and technology for agriculture and construction, pushing boundaries for productivity and sustainability worldwide |
55,618 | |||
| 82 |
Chevronchevron.com
The company values its people and their innovation in tackling energy challenges, fostering open and respectful communication on LinkedIn |
55,495 | |||
| 83 |
Broadcombroadcom.com
A leading global infrastructure technology company with a rich history of innovation, collaboration, and engineering excellence spanning over 60 years |
54,926 | |||
| 84 |
Boston Scientificbostonscientific.com
Develops and provides innovative medical technologies including devices and therapies for various diseases, improving patient health and reducing healthcare costs worldwide. |
54,633 | |||
| 85 |
Danaher Corporationdanaher.com
Global life sciences and diagnostics innovator accelerating science and technology to improve human health, partnering with customers to advance life-changing science. |
53,252 | |||
| 86 |
Lear Corporationlear.com
Designs and manufactures advanced seating and electronic systems for major automakers, focusing on comfort, safety, and efficiency worldwide. |
52,409 | |||
| 87 |
Techtronic Industries - TTIttigroup.com
A global leader in power tools, accessories, outdoor equipment, and cleaning products, focused on delivering innovative and high-quality solutions to professionals and DIYers worldwide |
52,000 | |||
| 88 |
Collins Aerospacertx.com
Global aerospace company designing and delivering connected solutions for passenger safety, mission success, space exploration, and operational efficiency. |
51,969 | |||
| 89 |
Emersonemerson.com
A global technology and engineering company providing innovative solutions for industrial and commercial markets, driving innovation for a healthier, safer, and smarter world |
51,841 | |||
| 90 |
Strykerstryker.com
A global leader in medical technology, offering innovative products and services in reconstructive, MedSurg, neurotechnology, and spine to improve healthcare outcomes worldwide |
51,229 | |||
| 91 |
NASA - National Aeronautics and Space Administrationnasa.gov
A pioneering organization pushing the boundaries of space exploration, scientific discovery, and aeronautics research to benefit humanity and improve life on Earth |
50,817 | |||
| 92 |
Mary Kay Globalmarykay.com
A global beauty brand empowering women through innovative products, supporting independent contractors, and investing in science, sustainability, and social causes |
50,086 | |||
| 93 |
Amentumamentum.com
Amentum is a global leader in engineering, project management, and solutions integration, specializing in modernizing critical missions worldwide with speed and confidence |
50,000 | |||
| 94 |
Sherwin-Williamssherwin-williams.com
Global supplier of paints, coatings, and related products with extensive distribution network and diverse, innovative workforce worldwide. |
49,925 | |||
| 95 |
Mastercardmastercard.com
Global technology company in payments industry connecting and powering inclusive digital economy through safe, simple, smart transactions benefiting individuals, institutions, and businesses worldwide |
49,687 | |||
| 96 |
Cleveland Clinicmy.clevelandclinic.org
A not-for-profit academic medical center in Ohio, offering clinical care, research, and education with multiple facilities worldwide |
49,624 | |||
| 97 |
BorgWarnerborgwarner.com
A global leader in innovative and sustainable mobility solutions committed to reaching carbon neutrality by 2035, promoting inclusion, integrity, and responsibility |
49,000 | |||
| 98 |
Ecolabecolab.com
A global leader providing water, hygiene, and infection prevention solutions for various industries worldwide through comprehensive services and personalized insights |
48,879 | |||
| 99 |
Mayo Clinicmayoclinic.org
A leading not-for-profit medical practice founded on values of patient-centered care, teamwork, professionalism, and excellence in healthcare services |
48,774 | |||
| 100 | 48,589 | ||||
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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 11, 2026.
More company lists in the United States
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- Manufacturers in the United States 8,678
- Professional services firms in the United States 7,078
- Retail chains in the United States 6,980
- Financial services firms in the United States 6,864
- IT Services and IT Consulting companies in the United States 6,694
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The same list elsewhere in United States
- Companies with in-house R&D in California 1,276
- Companies with in-house R&D in Texas 442
- Companies with in-house R&D in New York State 419
- Companies with in-house R&D in Massachusetts 396
- Companies with in-house R&D in Illinois 322
- Companies with in-house R&D in Michigan 287
- Companies with in-house R&D in Ohio 277
- Companies with in-house R&D in Pennsylvania 255
- Companies with in-house R&D in New Jersey 224
- Companies with in-house R&D in Florida 221
- Companies with in-house R&D in Alabama 214
- Companies with in-house R&D in Georgia 173
- Companies with in-house R&D in Virginia 166
- Companies with in-house R&D in North Carolina 158
- Companies with in-house R&D in Wisconsin 154
- Companies with in-house R&D in Minnesota 146
- Companies with in-house R&D in Washington State 140
- Companies with in-house R&D in Colorado 113
- Companies with in-house R&D in Maryland 107
- Companies with in-house R&D in Indiana 104
- Companies with in-house R&D in New York 223
- Companies with in-house R&D in San Francisco 147
- Companies with in-house R&D in Houston 129
- Companies with in-house R&D in San Jose 103