# Companies with in-house R&D headquartered in the United States

Tamtam tracks 6,796 companies with in-house R&D headquartered in the United States. This list ranks the 100 largest by number of employees on LinkedIn, led by Amazon, Deloitte and The Home Depot. Their median headcount is 90,667. The most common headquarters are New York (6), Houston (5) and Chicago (4).

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.

🇺🇸 United States · 100 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Amazon](https://www.tamtam.ai/c/amazon) (amazon.com)<br>An e-commerce giant offering a vast selection of products, convenient shopping experiences, and fast delivery, connecting buyers with a wide range of sellers | Software Development | 🇺🇸 Seattle | 1,541,000 |  |
| 2 | [Deloitte](https://www.tamtam.ai/c/deloitte) (deloitte.com)<br>Global professional services firm empowering diverse talents to drive progress for clients worldwide through advice, action, and integrity | Business Consulting and Services | 🇺🇸 Worldwide | 526,765 | 1845 |
| 3 | [The Home Depot](https://www.tamtam.ai/c/the-home-depot) (homedepot.com)<br>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. | Retail | 🇺🇸 Atlanta | 491,000 | 1979 |
| 4 | [Cognizant](https://www.tamtam.ai/c/cognizant) (cognizant.com)<br>This company helps clients modernize technology, reimagine processes, and transform experiences to stay ahead in a rapidly changing world, improving everyday life | IT Services and IT Consulting | 🇺🇸 Teaneck | 372,148 |  |
| 5 | [IBM](https://www.tamtam.ai/c/ibm) (ibm.com)<br>It focuses on collaboration among technologists, developers, and engineers to improve technology, infrastructure, software, and consulting for better solutions. | IT Services and IT Consulting | 🇺🇸 Armonk | 335,625 |  |
| 6 | [Google](https://www.tamtam.ai/c/google) (google.com)<br>Provides a powerful search engine, web services, and advertising tools to help users find information and businesses reach customers | Software Development | 🇺🇸 Mountain View | 304,428 |  |
| 7 | [McDonald's](https://www.tamtam.ai/c/mcdonald-s) (corporate.mcdonalds.com)<br>global fast-food restaurant chain operating over 37,000 locations worldwide, serving popular menu items and employing 1.9 million people | Restaurants | 🇺🇸 Chicago | 261,219 |  |
| 8 | [Jabil](https://www.tamtam.ai/c/jabil) (jabil.com)<br>A global manufacturing solutions provider with extensive capabilities in design, manufacturing, supply chain management, and product management for leading brands worldwide | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 St Petersburg | 250,000 | 1966 |
| 9 | [Microsoft](https://www.tamtam.ai/c/microsoft) (microsoft.com)<br>Develops and sells software, hardware, and cloud services, including the Windows operating system and Office suite, to improve productivity and digital experiences | Software Development | 🇺🇸 Redmond | 233,562 |  |
| 10 | [The Walt Disney Company](https://www.tamtam.ai/c/the-walt-disney-company) (thewaltdisneycompany.com)<br>An entertainment company creating magical experiences through animated features, theme park attractions, sports coverage, and television shows for global audiences | Entertainment Providers | 🇺🇸 Burbank | 220,000 |  |
| 11 | [Oracle](https://www.tamtam.ai/c/oracle) (oracle.com)<br>Delivers cloud infrastructure, data, and applications for AI, offering scalable solutions for various deployments, integrating AI into databases, data platforms, and business applications. | IT Services and IT Consulting | 🇺🇸 Austin | 206,235 | 1977 |
| 12 | [AT&T](https://www.tamtam.ai/c/at-and-t) (att.com)<br>Innovative company connecting people with technology to create a seamless, better life through network, products, services, and passionate employees | Telecommunications | 🇺🇸 Dallas | 193,793 |  |
| 13 | [Comcast](https://www.tamtam.ai/c/comcast) (comcast.com)<br>Delivering broadband, mobile, and video products, along with entertainment, sports, news, and theme park experiences; driven by passionate creators and innovators | Telecommunications | 🇺🇸 Philadelphia | 189,000 | 1963 |
| 14 | [ADP](https://www.tamtam.ai/c/adp) (adp.com)<br>Innovative company focusing on improving workplace experiences through advanced products and services in HR, talent, time management, benefits, and payroll | Human Resources Services | 🇺🇸 Roseland | 187,000 |  |
| 15 | [Apple](https://www.tamtam.ai/c/apple) (apple.com)<br>Designs and manufactures innovative consumer electronics, including iPhones, iPads, and Macs, known for their user-friendly interfaces and sleek design | Computers and Electronics Manufacturing | 🇺🇸 Cupertino | 184,384 | 1976 |
| 16 | [Ford Motor Company](https://www.tamtam.ai/c/ford-motor-company) (ford.com)<br>Revolutionizing transportation with iconic and innovative connected electric vehicles, dedicated to serving customers, communities, and the planet for a better future | Motor Vehicle Manufacturing | 🇺🇸 Dearborn | 169,414 | 1903 |
| 17 | [Meta](https://www.tamtam.ai/c/meta) (meta.com)<br>Focuses on creating social technology platforms, including virtual and augmented reality experiences, and operates popular apps like Facebook and Instagram to connect people globally | Software Development | 🇺🇸 Menlo Park | 164,418 |  |
| 18 | [Uber](https://www.tamtam.ai/c/uber-san-francisco) (uber.com)<br>Global platform powering flexible earnings and movement of people and things, constantly reimagining how to enable transportation and delivery services worldwide | Internet Marketplace Platforms | 🇺🇸 San Francisco | 160,913 |  |
| 19 | [University of California](https://www.tamtam.ai/c/university-of-california) (jobs.universityofcalifornia.edu)<br>Educating top minds, advancing research, engaging communities, supporting economy, improving health, protecting environment, and driving innovation across California. | Higher Education | 🇺🇸 Oakland | 152,503 |  |
| 20 | [HCA Healthcare](https://www.tamtam.ai/c/hca-healthcare) (dpxmedcity.net)<br>A healthcare organization with 186 hospitals and 2,300 sites, focused on providing quality care, advancing science, and impacting communities positively | Hospitals and Health Care | 🇺🇸 Nashville | 150,409 |  |
| 21 | [Amazon Web Services (AWS)](https://www.tamtam.ai/c/amazon-web-services-aws) (amazon.com)<br>A global cloud computing provider offering scalable, reliable, and cost-effective infrastructure services to businesses worldwide, eliminating the need for capital infrastructure expenses | IT Services and IT Consulting | 🇺🇸 Seattle | 147,090 | 2006 |
| 22 | [Johnson&Johnson](https://www.tamtam.ai/c/johnson-and-johnson) (jnj.com)<br>Largest, most broadly based healthcare company, producing life-changing breakthroughs, creating digital health tools, 3-D printing artificial joints, and discovering lifesaving drugs. | Hospitals and Health Care | 🇺🇸 New Brunswick | 145,000 | 1887 |
| 23 | [HP](https://www.tamtam.ai/c/hp) (hp.com)<br>This company creates technology solutions aiming to inspire innovation and make extraordinary contributions to humanity through climate action, human rights, and digital equity | IT Services and IT Consulting | 🇺🇸 Palo Alto | 142,944 |  |
| 24 | [Abbott](https://www.tamtam.ai/c/abbott-abbott-park) (abbott.com)<br>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 | Hospitals and Health Care | 🇺🇸 Abbott Park | 140,778 |  |
| 25 | [PepsiCo](https://www.tamtam.ai/c/pepsico) (pepsico.com)<br>A global company championing innovation, creating deep connections with iconic brands, and empowering employees to make a global impact for a better world | Food and Beverage Services | 🇺🇸 Purchase | 140,098 |  |
| 26 | [RTX](https://www.tamtam.ai/c/rtx) (rtx.com)<br>Aerospace and defense operations through three business units focused on solving complex problems within aviation, space systems, and military technology sectors worldwide. | Aviation and Aerospace Component Manufacturing | 🇺🇸 Arlington | 139,657 |  |
| 27 | [Kaiser Permanente](https://www.tamtam.ai/c/kaiser-permanente) (healthy.kaiserpermanente.org)<br>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 | Hospitals and Health Care | 🇺🇸 Oakland | 137,397 | 1945 |
| 28 | [Honeywell Technologies](https://www.tamtam.ai/c/honeywell-technologies) (honeywell.com)<br>a global automation company that provides services, solutions, and products for building, industrial, and process sectors, focusing on automation to autonomy. | Automation Machinery Manufacturing | 🇺🇸 Charlotte | 134,559 |  |
| 29 | [Dell Technologies](https://www.tamtam.ai/c/dell-technologies) (dell.com)<br>Provide essential technology infrastructure enabling organizations to transform and advance their digital futures through innovative solutions and support. | Computer Hardware Manufacturing | 🇺🇸 Round Rock | 133,530 | 1984 |
| 30 | [Boeing](https://www.tamtam.ai/c/boeing) (boeing.com)<br>A global aerospace leader providing commercial airplanes, defense, space systems, and services, focused on innovation, customer delivery, and employee growth | Aviation and Aerospace Component Manufacturing | 🇺🇸 Arlington | 129,130 | 1916 |
| 31 | [Tesla Austria GmbH](https://www.tamtam.ai/c/tesla-austria-gmbh) (tesla.com)<br>A company focused on accelerating the world's transition to sustainable energy through electric vehicles and clean energy generation and storage solutions | Manufacturing | 🇺🇸 Austin | 128,000 | 2003 |
| 32 | [Sikorsky Aircraft Corporation](https://www.tamtam.ai/c/sikorsky-aircraft-corporation) (lockheedmartin.com)<br>Global security and aerospace company providing integrated solutions and predictive technologies to keep customers ahead of threats through advanced technology systems and services | Defense and Space Manufacturing | 🇺🇸 Bethesda | 115,000 | 1912 |
| 33 | [YouTube](https://www.tamtam.ai/c/youtube) (youtube.com)<br>Team-oriented, creative workplace within Google, developing and rolling out key features and products quickly Headquartered in San Bruno Opportunities globally | Technology, Information and Internet | 🇺🇸 San Bruno | 113,401 |  |
| 34 | [Intel](https://www.tamtam.ai/c/intel) (intel.com)<br>This company drives innovation in AI, analytics, and cloud-to-edge technology to shape a better future through breakthroughs in self-driving cars, environmental conservation, and daily conveniences | Semiconductor Manufacturing | 🇺🇸 Santa Clara | 109,404 |  |
| 35 | [General Motors](https://www.tamtam.ai/c/general-motors) (gm.com)<br>Development of safer, sustainable transportation technologies and solutions with a focus on inclusivity, innovation, and reducing crashes, emissions, and congestion. | Motor Vehicle Manufacturing | 🇺🇸 Detroit | 105,679 |  |
| 36 | [JLL](https://www.tamtam.ai/c/jll) (jill.com)<br>A leading professional services firm specializing in real estate and investment management, creating rewarding opportunities and sustainable solutions using advanced technology | Real Estate | 🇺🇸 Chicago | 104,899 |  |
| 37 | [Pfizer](https://www.tamtam.ai/c/pfizer) (pfizer.com)<br>A leading biopharmaceutical company focused on research and innovation to develop therapies that improve and extend the lives of patients worldwide | Pharmaceutical Manufacturing | 🇺🇸 New York | 102,598 |  |
| 38 | [Medtronic](https://www.tamtam.ai/c/medtronic) (medtronic.com)<br>A healthcare technology company tackling challenging health issues worldwide with innovative solutions that significantly impact and improve lives | Medical Equipment Manufacturing | 🇺🇸 Minneapolis | 100,323 |  |
| 39 | [Thermo Fisher Scientific](https://www.tamtam.ai/c/thermo-fisher-scientific) (thermofisher.com)<br>A global leader in science services, providing innovative technologies and pharmaceutical support to make the world healthier, cleaner, and safer | Biotechnology Research | 🇺🇸 Waltham | 100,256 |  |
| 40 | [General Dynamics UK](https://www.tamtam.ai/c/general-dynamics) (gd.com)<br>A global company focusing on safety and security, producing a range of products from business jets to submarines with a culture of continuous improvement | Defense and Space Manufacturing | 🇺🇸 Reston | 100,000 | 1952 |
| 41 | [GE](https://www.tamtam.ai/c/ge) (ge.com)<br>Focus on advancing aviation and energy industries through innovative technologies and solutions shared via specialized aerospace and energy platforms. | Industrial Machinery Manufacturing | 🇺🇸 Boston | 99,488 |  |
| 42 | [Foxconn](https://www.tamtam.ai/c/foxconn) (foxconn.com)<br>Global electronics manufacturer specializing in hardware, software, AI, semiconductors, and emerging technologies with extensive R&D and sustainability focus. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 | 98,833 |  |
| 43 | [Nike](https://www.tamtam.ai/c/nike) (nike.com)<br>Leading designer, marketer, and distributor of athletic footwear, apparel, equipment, and accessories for various sports and fitness activities worldwide Founded in 1972 | Retail | 🇺🇸 Beaverton | 98,830 |  |
| 44 | [T-Mobile](https://www.tamtam.ai/c/t-mobile) (careers.t-mobile.com)<br>Leading US wireless provider delivering advanced 4G LTE and nationwide 5G networks, prioritizing customer value, service excellence, and innovation in Bellevue, Washington | Telecommunications | 🇺🇸 Bellevue | 96,232 |  |
| 45 | [The Coca-Cola Company](https://www.tamtam.ai/c/the-coca-cola-company) (coca-colacompany.com)<br>A global beverage company selling popular brands in multiple categories, committed to sustainability, innovation, and making a positive impact worldwide | Food and Beverage Services | 🇺🇸 Atlanta | 96,000 |  |
| 46 | [Cisco](https://www.tamtam.ai/c/cisco) (cisco.com)<br>A technology company founded in 1984, specializing in hardware, software, and services for Internet solutions and networking technologies | Software Development | 🇺🇸 San Jose | 95,899 | 1984 |
| 47 | [American Express](https://www.tamtam.ai/c/american-express) (americanexpress.com)<br>A globally integrated payments company supporting customers' financial confidence, promoting commerce, and providing experiences that enrich lives and drive business success | Financial Services | 🇺🇸 New York | 94,909 |  |
| 48 | [Procter & Gamble](https://www.tamtam.ai/c/procter-and-gamble) (pg.com)<br>Designs, develops, and sells a wide range of iconic consumer goods brands worldwide, improving daily life for billions of consumers through innovative products. | Manufacturing | 🇺🇸 Cincinnati | 92,610 |  |
| 49 | [TikTok](https://www.tamtam.ai/c/tiktok) (tiktok.com)<br>A leading platform for short-form video, fostering creativity and innovation with a flat company structure and global presence for career growth opportunities | Entertainment Providers | 🇺🇸 Los Angeles | 91,370 |  |
| 50 | [Chick-fil-A Corporate Support Center](https://www.tamtam.ai/c/chick-fil-a-corporate-support-center) (chick-fil-a.com)<br>Company provides extensive support for restaurant operations including digital, financial, analytics, and development to ensure exceptional customer experiences globally. | Restaurants | 🇺🇸 Atlanta | 90,667 | 1946 |
| 51 | [Hewlett Packard Enterprise](https://www.tamtam.ai/c/hewlett-packard-enterprise) (hpe.com)<br>This company is a global edge-to-cloud company that drives technology and innovation to fulfill its passion and purpose | IT Services and IT Consulting | 🇺🇸 Houston | 90,021 |  |
| 52 | [Salesforce](https://www.tamtam.ai/c/salesforce) (salesforce.com)<br>It provides customer relationship management solutions, integrating data, artificial intelligence, and a focus on trust to enhance customer experiences. | Software Development | 🇺🇸 San Francisco | 86,347 |  |
| 53 | [Northrop Grumman](https://www.tamtam.ai/c/northrop-grumman) (northropgrumman.com)<br>Development of advanced technology solutions in autonomous systems, cyber, space, and defense to enhance global security and modernization. | Defense and Space Manufacturing | 🇺🇸 Falls Church | 86,220 |  |
| 54 | [Capital One](https://www.tamtam.ai/c/capital-one) (capitalone.com)<br>Innovative bank focused on financial inclusion, creating tools to improve customers' lives, and encouraging a work-life balance for employees | Financial Services | 🇺🇸 McLean | 82,863 |  |
| 55 | [DoorDash](https://www.tamtam.ai/c/doordash) (careersatdoordash.com)<br>A tech and logistics company focused on empowering local economies through delivery services, with a mission to expand beyond food delivery | Software Development | 🇺🇸 San Francisco | 80,754 |  |
| 56 | [IQVIA](https://www.tamtam.ai/c/iqvia) (iqvia.com)<br>Provides clinical research, commercial insights, and healthcare intelligence to life sciences and healthcare industries, accelerating medical treatments for better patient outcomes. | Hospitals and Health Care | 🇺🇸 Durham | 80,633 | 1954 |
| 57 | [SLB](https://www.tamtam.ai/c/slb-houston) (slb.com)<br>Global innovators developing advanced technologies to unlock energy access while reducing carbon emissions through sustainable engineering and diverse technical change maker expertise. | Technology, Information and Internet | 🇺🇸 Houston | 79,707 |  |
| 58 | [Mondelēz International](https://www.tamtam.ai/c/mondelez-international) (mondelezinternational.com)<br>Global multinational manufacturing and marketing iconic snacks, biscuits, chocolate, candy, and gum brands including Oreo and Cadbury to empower people to snack right. | Food and Beverage Manufacturing | 🇺🇸 Chicago | 79,000 | 2012 |
| 59 | [Goldman Sachs](https://www.tamtam.ai/c/goldman-sachs) (goldmansachs.com)<br>Global financial institution providing expert capital markets services, investment banking, and asset management for clients through partnership, integrity, and world-class operational excellence. | Financial Services | 🇺🇸 New York | 76,000 |  |
| 60 | [CBRE](https://www.tamtam.ai/c/cbre) (cbre.com)<br>A real estate company providing comprehensive services and insights to empower clients in maximizing opportunities and success in the industry | Real Estate | 🇺🇸 Dallas | 75,008 |  |
| 61 | [Airbnb](https://www.tamtam.ai/c/airbnb) (airbnb.com)<br>The company offers unique stays and experiences worldwide through a platform connecting hosts with guests, fostering community connections | Software Development | 🇺🇸 San Francisco | 72,938 | 2007 |
| 62 | [GE Vernova](https://www.tamtam.ai/c/ge-vernova) (linktr.ee)<br>A purpose-built company focused on electrifying the planet and decarbonizing it through a diverse portfolio of energy businesses, ensuring reliable and sustainable energy | Energy Technology | 🇺🇸 Boston | 70,646 |  |
| 63 | [Cargill](https://www.tamtam.ai/c/cargill) (cargill.com)<br>A family company providing food, ingredients, solutions, and products in a sustainable way Partnering with producers and customers for a better future | Food and Beverage Manufacturing | 🇺🇸 Wayzata | 69,086 |  |
| 64 | [Baker Hughes](https://www.tamtam.ai/c/baker-hughes-houston) (bakerhughes.com)<br>Energy technology company providing innovative solutions globally, focusing on safety, efficiency, and sustainability in the energy and industrial sectors | Energy Technology | 🇺🇸 Houston | 67,440 |  |
| 65 | [3M](https://www.tamtam.ai/c/3m) (3m.com)<br>A company using science and technology to improve people's lives, making the impossible possible | Industrial Machinery Manufacturing | 🇺🇸 Saint Paul | 63,807 | 1902 |
| 66 | [Caterpillar Inc.](https://www.tamtam.ai/c/caterpillar-inc) (caterpillar.com)<br>A global leader in manufacturing construction and mining equipment, engines, turbines, and locomotives, focused on sustainability and providing value to customers worldwide | Machinery Manufacturing | 🇺🇸 Irving | 62,810 | 1925 |
| 67 | [WNS](https://www.tamtam.ai/c/wns) (wns.com)<br>Global provider of digital-led business transformation, combining industry knowledge, technology, analytics, and process expertise to deliver innovative solutions. | Business Consulting and Services | 🇺🇸 New York | 61,367 | 1996 |
| 68 | [AbbVie](https://www.tamtam.ai/c/abbvie) (abbvie.com)<br>Global biopharmaceutical company focused on creating impactful medicines for complex health issues in immunology, oncology, neuroscience, eye care, aesthetics, and other unmet needs | Pharmaceutical Manufacturing | 🇺🇸 North Chicago | 61,015 |  |
| 69 | [Halliburton](https://www.tamtam.ai/c/halliburton) (halliburton.com)<br>Collaborates to engineer solutions maximizing energy asset value, from locating hydrocarbons, managing data, drilling, evaluating, and constructing wells, to optimizing production. | Oil and Gas | 🇺🇸 Houston | 60,277 | 1919 |
| 70 | [GE HealthCare](https://www.tamtam.ai/c/ge-healthcare) (gehealthcare.com)<br>Global medical technology and digital solutions innovator leveraging intelligent devices, data analytics, and artificial intelligence to drive precision health and improve patient outcomes worldwide | Hospitals and Health Care | 🇺🇸 Chicago | 60,041 | 1892 |
| 71 | [Cummins Inc.](https://www.tamtam.ai/c/cummins-inc) (cummins.com)<br>empowering diverse professionals through career growth, innovation, and development in engineering, manufacturing, marketing, and supply chain roles worldwide | Motor Vehicle Manufacturing | 🇺🇸 Columbus | 60,000 |  |
| 72 | [The Estée Lauder Companies Inc.](https://www.tamtam.ai/c/the-estee-lauder-companies-inc) (elcompanies.com)<br>A global leader in skincare, makeup, fragrance, and hair care, offering luxury brands sold in 150+ countries, with a diverse product portfolio | Personal Care Product Manufacturing | 🇺🇸 New York | 60,000 |  |
| 73 | [Qualcomm](https://www.tamtam.ai/c/qualcomm) (qualcomm.com)<br>Providing widespread intelligent computing solutions | Semiconductor Manufacturing | 🇺🇸 San Diego | 57,548 |  |
| 74 | [Eli Lilly and Company](https://www.tamtam.ai/c/eli-lilly-and-company) (lilly.com)<br>A pharmaceutical company dedicated to discovering medicines, improving disease management, and giving back to communities through philanthropy and volunteerism | Pharmaceutical Manufacturing | 🇺🇸 Indianapolis | 56,750 |  |
| 75 | [Northwell Health](https://www.tamtam.ai/c/northwell-health) (northwell.edu)<br>Largest New York healthcare system with hospitals, outpatient facilities, research institutes, medical education, and extensive patient care services. | Hospitals and Health Care | 🇺🇸 Lake Success | 56,405 | 1997 |
| 76 | [Carrier Corporation](https://www.tamtam.ai/c/carrier-hvac) (carrier.com)<br>Global provider of sustainable climate and energy solutions, enhancing comfort, safety, and efficiency in buildings and transportation worldwide. | Machinery Manufacturing | 🇺🇸 | 56,000 | 1902 |
| 77 | [Parker Hannifin](https://www.tamtam.ai/c/parker-hannifin) (parker.com)<br>Global leader in motion and control technologies, enabling engineering breakthroughs for a better tomorrow Diversified company providing vital products for various industries worldwide | Industrial Machinery Manufacturing | 🇺🇸 Cleveland | 56,000 | 1917 |
| 78 | [Mars](https://www.tamtam.ai/c/mars) (mars.com)<br>Multinational conglomerate focused on delivering quality products through five core principles including responsibility and efficiency while employing over one hundred fifty thousand associates globally. | Food and Beverage Manufacturing | 🇺🇸 McLean | 55,984 | 1911 |
| 79 | [Flex](https://www.tamtam.ai/c/flex-austin) (flex.com)<br>Manufacturing partner supporting diverse customers in designing and building innovative products aimed at improving the world and daily life. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Austin | 55,736 |  |
| 80 | [BNY](https://www.tamtam.ai/c/bny) (bny.com)<br>Global financial platforms provider managing investment assets and custody services for top banks, governments, pension plans, and major corporations to accelerate growth. | Financial Services | 🇺🇸 New York | 55,654 | 1784 |
| 81 | [John Deere](https://www.tamtam.ai/c/john-deere) (deere.com)<br>A global leader in cutting-edge products and technology for agriculture and construction, pushing boundaries for productivity and sustainability worldwide | Machinery Manufacturing | 🇺🇸 Moline | 55,618 | 1837 |
| 82 | [Chevron](https://www.tamtam.ai/c/chevron) (chevron.com)<br>The company values its people and their innovation in tackling energy challenges, fostering open and respectful communication on LinkedIn | Oil and Gas | 🇺🇸 Houston | 55,495 |  |
| 83 | [Broadcom](https://www.tamtam.ai/c/broadcom) (broadcom.com)<br>A leading global infrastructure technology company with a rich history of innovation, collaboration, and engineering excellence spanning over 60 years | Semiconductor Manufacturing | 🇺🇸 Palo Alto | 54,926 |  |
| 84 | [Boston Scientific](https://www.tamtam.ai/c/boston-scientific) (bostonscientific.com)<br>Develops and provides innovative medical technologies including devices and therapies for various diseases, improving patient health and reducing healthcare costs worldwide. | Medical Equipment Manufacturing | 🇺🇸 Marlborough | 54,633 |  |
| 85 | [Danaher Corporation](https://www.tamtam.ai/c/danaher-corporation) (danaher.com)<br>Global life sciences and diagnostics innovator accelerating science and technology to improve human health, partnering with customers to advance life-changing science. | Medical Equipment Manufacturing | 🇺🇸 Washington | 53,252 | 1984 |
| 86 | [Lear Corporation](https://www.tamtam.ai/c/lear-corporation) (lear.com)<br>Designs and manufactures advanced seating and electronic systems for major automakers, focusing on comfort, safety, and efficiency worldwide. | Motor Vehicle Manufacturing | 🇺🇸 Southfield | 52,409 |  |
| 87 | [Techtronic Industries - TTI](https://www.tamtam.ai/c/techtronic-industries-tti) (ttigroup.com)<br>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 | Manufacturing | 🇺🇸 Fort Lauderdale | 52,000 |  |
| 88 | [Collins Aerospace](https://www.tamtam.ai/c/collins-aerospace) (rtx.com)<br>Global aerospace company designing and delivering connected solutions for passenger safety, mission success, space exploration, and operational efficiency. | Aviation and Aerospace Component Manufacturing | 🇺🇸 Charlotte | 51,969 |  |
| 89 | [Emerson](https://www.tamtam.ai/c/emerson) (emerson.com)<br>A global technology and engineering company providing innovative solutions for industrial and commercial markets, driving innovation for a healthier, safer, and smarter world | Automation Machinery Manufacturing | 🇺🇸 St. Louis | 51,841 | 1890 |
| 90 | [Stryker](https://www.tamtam.ai/c/stryker) (stryker.com)<br>A global leader in medical technology, offering innovative products and services in reconstructive, MedSurg, neurotechnology, and spine to improve healthcare outcomes worldwide | Medical Equipment Manufacturing | 🇺🇸 Kalamazoo | 51,229 | 1941 |
| 91 | [NASA - National Aeronautics and Space Administration](https://www.tamtam.ai/c/nasa-national-aeronautics-and-space-administration) (nasa.gov)<br>A pioneering organization pushing the boundaries of space exploration, scientific discovery, and aeronautics research to benefit humanity and improve life on Earth | Aviation and Aerospace Component Manufacturing | 🇺🇸 Washington | 50,817 | 1958 |
| 92 | [Mary Kay Global](https://www.tamtam.ai/c/mary-kay-global) (marykay.com)<br>A global beauty brand empowering women through innovative products, supporting independent contractors, and investing in science, sustainability, and social causes | Personal Care Product Manufacturing | 🇺🇸 Addison | 50,086 |  |
| 93 | [Amentum](https://www.tamtam.ai/c/amentum) (amentum.com)<br>Amentum is a global leader in engineering, project management, and solutions integration, specializing in modernizing critical missions worldwide with speed and confidence | Defense and Space Manufacturing | 🇺🇸 Chantilly | 50,000 |  |
| 94 | [Sherwin-Williams](https://www.tamtam.ai/c/sherwin-williams) (sherwin-williams.com)<br>Global supplier of paints, coatings, and related products with extensive distribution network and diverse, innovative workforce worldwide. | Paint, Coating, and Adhesive Manufacturing | 🇺🇸 Cleveland | 49,925 |  |
| 95 | [Mastercard](https://www.tamtam.ai/c/mastercard) (mastercard.com)<br>Global technology company in payments industry connecting and powering inclusive digital economy through safe, simple, smart transactions benefiting individuals, institutions, and businesses worldwide | IT Services and IT Consulting | 🇺🇸 Purchase | 49,687 |  |
| 96 | [Cleveland Clinic](https://www.tamtam.ai/c/cleveland-clinic) (my.clevelandclinic.org)<br>A not-for-profit academic medical center in Ohio, offering clinical care, research, and education with multiple facilities worldwide | Hospitals and Health Care | 🇺🇸 Cleveland | 49,624 |  |
| 97 | [BorgWarner](https://www.tamtam.ai/c/borgwarner) (borgwarner.com)<br>A global leader in innovative and sustainable mobility solutions committed to reaching carbon neutrality by 2035, promoting inclusion, integrity, and responsibility | Motor Vehicle Manufacturing | 🇺🇸 Auburn Hills | 49,000 |  |
| 98 | [Ecolab](https://www.tamtam.ai/c/ecolab) (ecolab.com)<br>A global leader providing water, hygiene, and infection prevention solutions for various industries worldwide through comprehensive services and personalized insights | Chemical Manufacturing | 🇺🇸 Saint Paul | 48,879 |  |
| 99 | [Mayo Clinic](https://www.tamtam.ai/c/mayo-clinic) (mayoclinic.org)<br>A leading not-for-profit medical practice founded on values of patient-centered care, teamwork, professionalism, and excellence in healthcare services | Hospitals and Health Care | 🇺🇸 Rochester | 48,774 |  |
| 100 | [Raytheon](https://www.tamtam.ai/c/raytheon) (rtx.com)<br>Develops integrated air and missile defense, advanced sensors, space-based systems, hypersonics, and cyber solutions to provide next-generation protection and high-performance military effectors. | Defense and Space Manufacturing | 🇺🇸 Arlington | 48,589 | 1922 |

## 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

- [The largest companies in the United States](https://www.tamtam.ai/l/largest-companies-united-states) (104,974)
- [Multinational companies in the United States](https://www.tamtam.ai/l/multinational-companies-united-states) (16,197)
- [Manufacturers in the United States](https://www.tamtam.ai/l/manufacturers-united-states) (8,678)
- [Professional services firms in the United States](https://www.tamtam.ai/l/professional-services-firms-united-states) (7,078)
- [Retail chains in the United States](https://www.tamtam.ai/l/retail-chains-united-states) (6,980)
- [Financial services firms in the United States](https://www.tamtam.ai/l/financial-services-firms-united-states) (6,864)
- [IT Services and IT Consulting companies in the United States](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-united-states) (6,694)
- [SaaS companies in the United States](https://www.tamtam.ai/l/saas-companies-united-states) (6,410)
- [IT services companies in the United States](https://www.tamtam.ai/l/it-services-companies-united-states) (5,818)
- [Healthcare providers in the United States](https://www.tamtam.ai/l/healthcare-providers-united-states) (5,810)
- [Critical infrastructure operators in the United States](https://www.tamtam.ai/l/critical-infrastructure-operators-united-states) (5,801)
- [Hospitals and Health Care companies in the United States](https://www.tamtam.ai/l/hospitals-and-health-care-companies-united-states) (5,573)
- [Hardware manufacturers in the United States](https://www.tamtam.ai/l/hardware-companies-united-states) (5,346)
- [Software Development companies in the United States](https://www.tamtam.ai/l/software-development-companies-united-states) (5,311)
- [Financial Services companies in the United States](https://www.tamtam.ai/l/financial-services-companies-united-states) (5,012)
- [Companies with a mobile app in the United States](https://www.tamtam.ai/l/companies-with-mobile-app-united-states) (4,663)
- [Consulting firms in the United States](https://www.tamtam.ai/l/consulting-firms-united-states) (4,381)
- [AI companies in the United States](https://www.tamtam.ai/l/ai-companies-united-states) (4,246)
- [Public sector organisations in the United States](https://www.tamtam.ai/l/public-sector-organisations-united-states) (4,149)
- [Subscription businesses in the United States](https://www.tamtam.ai/l/subscription-businesses-united-states) (3,923)
- [Real Estate companies in the United States](https://www.tamtam.ai/l/real-estate-companies-united-states) (3,808)
- [Higher Education companies in the United States](https://www.tamtam.ai/l/higher-education-companies-united-states) (3,470)
- [Construction companies in the United States](https://www.tamtam.ai/l/construction-companies-united-states) (3,271)
- [Publicly traded companies in the United States](https://www.tamtam.ai/l/publicly-traded-companies-united-states) (3,099)

## The same list elsewhere in United States

- [Companies with in-house R&D in California](https://www.tamtam.ai/l/r-and-d-companies-california) (1,276)
- [Companies with in-house R&D in Texas](https://www.tamtam.ai/l/r-and-d-companies-texas) (442)
- [Companies with in-house R&D in New York State](https://www.tamtam.ai/l/r-and-d-companies-new-york-state) (419)
- [Companies with in-house R&D in Massachusetts](https://www.tamtam.ai/l/r-and-d-companies-massachusetts) (396)
- [Companies with in-house R&D in Illinois](https://www.tamtam.ai/l/r-and-d-companies-illinois) (322)
- [Companies with in-house R&D in Michigan](https://www.tamtam.ai/l/r-and-d-companies-michigan) (287)
- [Companies with in-house R&D in Ohio](https://www.tamtam.ai/l/r-and-d-companies-ohio) (277)
- [Companies with in-house R&D in Pennsylvania](https://www.tamtam.ai/l/r-and-d-companies-pennsylvania) (255)
- [Companies with in-house R&D in New Jersey](https://www.tamtam.ai/l/r-and-d-companies-new-jersey) (224)
- [Companies with in-house R&D in Florida](https://www.tamtam.ai/l/r-and-d-companies-florida) (221)
- [Companies with in-house R&D in Alabama](https://www.tamtam.ai/l/r-and-d-companies-alabama) (214)
- [Companies with in-house R&D in Georgia](https://www.tamtam.ai/l/r-and-d-companies-georgia) (173)
- [Companies with in-house R&D in Virginia](https://www.tamtam.ai/l/r-and-d-companies-virginia) (166)
- [Companies with in-house R&D in North Carolina](https://www.tamtam.ai/l/r-and-d-companies-north-carolina) (158)
- [Companies with in-house R&D in Wisconsin](https://www.tamtam.ai/l/r-and-d-companies-wisconsin) (154)
- [Companies with in-house R&D in Minnesota](https://www.tamtam.ai/l/r-and-d-companies-minnesota) (146)
- [Companies with in-house R&D in Washington State](https://www.tamtam.ai/l/r-and-d-companies-washington-state) (140)
- [Companies with in-house R&D in Colorado](https://www.tamtam.ai/l/r-and-d-companies-colorado) (113)
- [Companies with in-house R&D in Maryland](https://www.tamtam.ai/l/r-and-d-companies-maryland) (107)
- [Companies with in-house R&D in Indiana](https://www.tamtam.ai/l/r-and-d-companies-indiana) (104)
- [Companies with in-house R&D in New York](https://www.tamtam.ai/l/r-and-d-companies-new-york) (223)
- [Companies with in-house R&D in San Francisco](https://www.tamtam.ai/l/r-and-d-companies-san-francisco) (147)
- [Companies with in-house R&D in Houston](https://www.tamtam.ai/l/r-and-d-companies-houston) (129)
- [Companies with in-house R&D in San Jose](https://www.tamtam.ai/l/r-and-d-companies-san-jose) (103)

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Source: https://www.tamtam.ai/l/r-and-d-companies-united-states