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Top 100 companies with in-house R&D in Illinois

Tamtam tracks 322 companies with in-house R&D headquartered in Illinois. This list ranks the 100 largest by number of employees on LinkedIn, led by McDonald's, Abbott and JLL. Their median headcount is 3,043. Half of them were founded in 1932 or later. The most common headquarters are Chicago (43), Lisle (4) and Deerfield (3).

🇺🇸 Illinois100 companiesUpdated Nov 11, 2026

These Illinois-based companies with in-house R&D are primarily large, established firms across diverse sectors. They include global leaders such as McDonald's, the fast-food chain, Abbott, a healthcare technology provider, and JLL, a real estate and investment management firm. Other prominent companies are Mondelēz International, known for snack brands like Oreo, and John Deere, a leader in agriculture and construction machinery.

A clear pattern among these organizations is the strong presence of the food and beverage manufacturing sector, with companies like ADM and Kraft Heinz alongside Mondelēz. Another notable concentration is in medical and pharmaceutical fields, represented by Abbott, AbbVie, GE HealthCare, and Baxter International, reflecting a significant investment in health-related innovation within the state.

#CompanyIndustryHeadquarters EmployeesFounded
1
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

Restaurants 🇺🇸 Chicago 261,219 n/a
2
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

Hospitals and Health Care 🇺🇸 Abbott Park 140,778 n/a
3
JLLjill.com

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 n/a
4
Mondelēz 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.

Food and Beverage Manufacturing 🇺🇸 Chicago 79,000 2012
5
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

Pharmaceutical Manufacturing 🇺🇸 North Chicago 61,015 n/a
6
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

Hospitals and Health Care 🇺🇸 Chicago 60,041 1892
7
John Deeredeere.com

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
8
ADMadm.com

Global nutrition company transforming industries with plant-based solutions, sustainable practices, and cutting-edge innovations for a healthier, more environmentally friendly future

Food and Beverage Manufacturing 🇺🇸 Chicago 42,789 1902
9
Baxter International Inc.baxter.com

Development and delivery of innovative medical technologies and solutions to support clinicians and improve patient health worldwide.

Medical Equipment Manufacturing 🇺🇸 Deerfield 39,170 n/a
10
Kraft Heinzkraftheinz.com

Producer of high-quality food and beverage products including condiments, dairy, meals, beverages, and nutrition items marketed worldwide.

Food and Beverage Services 🇺🇸 Chicago 39,000 2015
11
Motorola Solutionsmotorolasolutions.com

The company builds and connects technologies to enhance public safety collaboration for safer communities, schools, hospitals, and businesses worldwide

Telecommunications 🇺🇸 Chicago 28,153 n/a
12
University of Illinois Urbana-Champaignillinois.edu

Leading public university with strong focus on education, research, global student opportunities, faculty innovation, and significant economic and community impact.

Higher Education 🇺🇸 Champaign 24,692 n/a
13
ITWcareers.itw.com

Global multi-industrial manufacturing leader driving solid growth with innovative solutions, emphasizing decentralized culture

Machinery Manufacturing 🇺🇸 Glenview 18,709 1912
14
University of Chicagouchicago.edu

A prestigious academic institution encouraging scholars and students to think critically, explore various disciplines, and challenge conventional ideas for global enrichment

Higher Education 🇺🇸 Chicago 18,526 n/a
15
Motorola Mobility (a Lenovo Company)motorola.com

Innovative smartphones and accessories are created by a global team, fostering collaboration, creativity, and a commitment to consumer-centric mobile technology innovation

Computers and Electronics Manufacturing 🇺🇸 Chicago 17,456 1928
16
TransUniontransunion.com

Global information and insights company enabling trust and confident transactions by providing actionable, data-driven pictures of individuals for businesses and consumers worldwide

IT Services and IT Consulting 🇺🇸 Chicago 17,036 n/a
17
Molexmolex.com

Global company providing connectivity solutions for various industries, including data communications, medical, automotive, and consumer electronics, to improve lives and transform the future

Appliances, Electrical, and Electronics Manufacturing 🇺🇸 Lisle 14,810 1938
18
UL Solutionsul.com

Global provider of safety testing, certification, inspection, auditing, and advisory services ensuring product security, sustainability, and market trust.

Professional Services 🇺🇸 Northbrook 14,487 1894
19
Nalco Water, An Ecolab Companyecolab.com

A global leader in water and process management solutions, leveraging connected chemistry and digital innovation to optimize sustainability and business outcomes

Chemical Manufacturing 🇺🇸 Naperville 12,751 n/a
20
Rush University Medical Centerrush.edu

Academic medical center with hospital, health center, university offering medical, nursing education, research, residency programs, and community outreach services.

Hospitals and Health Care 🇺🇸 Chicago 12,484 n/a
21
Zebra Technologieszebra.com

Improving workflows through innovative technology solutions, connecting frontline workers and optimizing visibility with scanning, track-and-trace, and automation tools

IT Services and IT Consulting 🇺🇸 Lincolnshire 11,698 n/a
22
Advocate Health Careadvocatehealth.com

Integrated nonprofit health system providing clinical innovation, specialized care, extensive research, education, and community benefits across multiple U.S. states.

Hospitals and Health Care 🇺🇸 Oak Brook 11,676 n/a
23
Internationalinternational.com

Manufacture durable trucks, engines, and buses with aftermarket parts, focusing on uptime, productivity, and sustainable mobility solutions.

Motor Vehicle Manufacturing 🇺🇸 Lisle 10,420 n/a
24
Brunswick Corporationbrunswick.com

Global leader in marine recreation offering propulsion systems, boats, marine technology, parts, accessories, and related services worldwide.

Manufacturing 🇺🇸 Mettawa 9,409 n/a
25
Aptaraptar.com

Global leader in drug and consumer product dosing, dispensing and protection technologies, creating innovative solutions for various end markets and brands.

Packaging and Containers Manufacturing 🇺🇸 7,968 n/a
26
Conagra Brandsconagrabrands.com

Diverse team managing iconic and emerging food brands with a focus on innovation, integrity, and consistent business results.

Food and Beverage Services 🇺🇸 Chicago 7,846 1919
27
Northwestern Memorial Hospitalnmh.org

A collaboration between healthcare and university partners, Northwestern Medicine aims to transform healthcare through research, teaching, and patient care excellence

Hospitals and Health Care 🇺🇸 Chicago 7,371 n/a
28
Ann & Robert H. Lurie Children's Hospital of Chicagoluriechildrens.org

Largest pediatric healthcare provider in the region, teaching partner of Northwestern University, nationally ranked in all pediatric specialties.

Hospitals and Health Care 🇺🇸 Chicago 7,202 n/a
29
Paylocitypaylocity.com

Award-winning provider of cloud-based HR and payroll software solutions, helping businesses automate processes, attract talent, and build employee connections

Software Development 🇺🇸 Schaumburg 7,046 1997
30
Navistar Incinternational.com

Manufacturing and selling commercial trucks, focusing on heavy-duty vehicles and returning to the International brand identity.

Motor Vehicle Manufacturing 🇺🇸 Lisle 6,795 1902
31
Dover Corporationdovercorporation.com

A global manufacturer and solutions provider delivering innovative equipment, components, and digital solutions across various industries with operational agility and entrepreneurial approach

Machinery Manufacturing 🇺🇸 Downers Grove 6,338 n/a
32
Kellanovakellanova.com

A global powerhouse in snacks, cereal, noodles, and frozen foods, committed to creating better days and promoting sustainable access to food

Food and Beverage Manufacturing 🇺🇸 Chicago 6,197 2023
33
Flex-N-Gateflex-n-gate.com

A leading provider of high-quality automotive products and systems, specializing in aftermarket and OEM parts with a focus on continuous improvement and on-time delivery

Motor Vehicle Manufacturing 🇺🇸 Urbana 6,096 1956
34
NorthShore University HealthSystemendeavorhealth.org

Integrated health system delivering personal patient care, convenient access, and pioneering medical services across multiple hospitals and clinics in Illinois.

Hospitals and Health Care 🇺🇸 Evanston 5,857 n/a
35
USGusg.com

A leading manufacturer of building products, providing innovative solutions for walls, ceilings, flooring, and roofing in construction markets worldwide

Wholesale Building Materials 🇺🇸 Chicago 5,752 1902
36
Ferraraferrarausa.com

A leading sugar confectionery company in the US, focused on driving category development with a diverse portfolio of iconic brands

Food and Beverage Manufacturing 🇺🇸 Chicago 5,430 1908
37
Littelfuselittelfuse.com

A global industrial technology manufacturing company providing innovative solutions for industrial, transportation, and electronics markets with a commitment to diversity and equal employment opportunities

Appliances, Electrical, and Electronics Manufacturing 🇺🇸 Rosemont 5,181 1927
38
James Hardiejameshardie.com

Global leader in high-performance fiber cement and fiber gypsum building solutions, empowering homeowners and professionals worldwide with premium quality products for design and protection

Wholesale Building Materials 🇺🇸 Chicago 5,022 n/a
39
Panduitpanduit.com

The company provides innovative electrical and network infrastructure solutions, serving as a trusted advisor in Data Center, Enterprise, and Industrial environments

Appliances, Electrical, and Electronics Manufacturing 🇺🇸 Tinley Park 4,640 1955
40
Northwestern University - The Feinberg School of Medicinefeinberg.northwestern.edu

A renowned medical school in Chicago offering MD programs, research, patient care, and community service to educate future physicians

Higher Education 🇺🇸 Chicago 4,009 1859
41
CTS Corporationctscorp.com

Design and manufacture sensors, actuators, and electronic components for OEMs across diverse industries, focusing on innovative, quality technology solutions.

Manufacturing 🇺🇸 Lisle 3,953 n/a
42
Videojet Technologiesvideojet.com

Global leader in coding and marking equipment, offering CIJ printers, laser marking systems, TTO printers, LPA, TIJ printers, and innovative track and trace solutions

Printing Services 🇺🇸 Wood Dale 3,815 n/a
43
Hollister Incorporatedhollister.com

develops, manufactures, and markets healthcare products and services globally, aiming to make life more rewarding and dignified for users through dignity, integrity, service, and stewardship.

Medical Equipment Manufacturing 🇺🇸 Libertyville 3,755 1921
44
Amsted Industriesamsted.com

Global manufacturer of industrial components for railroad, automotive, commercial vehicle, construction, and building markets, with a focus on innovation and employee ownership

Industrial Machinery Manufacturing 🇺🇸 Chicago 3,554 n/a
45
Griffith Foodsgriffithfoods.com

Global food company specializing in creative product development, partnering with customers to meet consumer needs while respecting the planet.

Food and Beverage Manufacturing 🇺🇸 Alsip 3,448 1919
46
Midwestern Universitymidwestern.edu

Not-for-profit graduate institution offering health science degrees including medicine, pharmacy, therapy, psychology, nursing, dentistry, optometry, and veterinary medicine

Higher Education 🇺🇸 Downers Grove 3,419 1900
47
IDEX Corporationidexcorp.com

The company manufactures mission-critical components used in everyday activities such as automotive safety, emergency rescue tools, and medical equipment

Manufacturing 🇺🇸 Northbrook 3,315 n/a
48
NAV Fund Servicesnavfundservices.com

Top-ranked fund administrator with award-winning service and technology, specializing in cost-effective solutions, digital assets, and emerging managers

Financial Services 🇺🇸 Oakbrook Terrace 3,061 1991
49
Tempus AItempus.com

Utilizing AI and data analytics, the company empowers physicians to personalize patient care with real-time insights and targeted therapies

Biotechnology Research 🇺🇸 Chicago 3,051 2015
50
Methode Electronicsmethode.com

Designs, engineers, produces mechatronic products for OEMs, utilizing broad technologies for user interface, LED lighting, power distribution, and sensor applications.

Appliances, Electrical, and Electronics Manufacturing 🇺🇸 Chicago 3,043 n/a

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51
JBT Mareljbtmarel.com

Provider of integrated technology, equipment, software, and services for food and beverage industries, supporting diverse product sectors worldwide.

Machinery Manufacturing 🇺🇸 Chicago 2,852 1884
52
Applied Systemswww1.appliedsystems.com

A leading provider of innovative cloud software for the insurance industry, driving transformation through digitization, automation, and new partnerships

Software Development 🇺🇸 Chicago 2,813 1983
53
UI Healthhospital.uillinois.edu

This academic health enterprise in Illinois offers comprehensive care, education, and research to promote health equity and train healthcare leaders

Hospitals and Health Care 🇺🇸 Chicago 2,813 n/a
54
Chamberlain Groupchamberlaingroup.com

A global leader in intelligent access technology, providing seamless, secure access to homes and businesses through innovative products and software solutions

Software Development 🇺🇸 Oak Brook 2,781 1954
55
S&C Electric Companysandc.com

This company specializes in developing innovative solutions for a more intelligent and resilient electrical grid, aiming for an outage-free, sustainable energy future

Electrical Equipment Manufacturing 🇺🇸 Chicago 2,761 1911
56
North American Lighting, Inc.nal.com

Largest Tier-1 automotive exterior lighting supplier in North America, provides lamp assemblies to automotive manufacturers, including Toyota, Honda, Nissan, Ford, Subaru, and General Motors.

Motor Vehicle Manufacturing 🇺🇸 Paris 2,737 1983
57
Fortune Brands Innovationsfbin.com

Designs and manufactures water innovations, outdoor living products, security solutions, and kitchen and bath cabinets for homeowners.

Manufacturing 🇺🇸 Deerfield 2,603 n/a
58
GE Transportation, a Wabtec companywabteccorp.com

A global leader in digital industrial solutions for rail, mining, marine, power, and drilling industries, specializing in advanced manufacturing and connected machines

Truck Transportation 🇺🇸 Chicago 2,533 1907
59
Robert Bosch Tool Corporation NAboschtools.com

Industry-leading tool corporation manufacturing power tools and accessories, providing innovative, durable, and versatile products through diverse global opportunities for growth and development

Manufacturing 🇺🇸 Mt. Prospect 2,525 1886
60
DRWdrw.com

Global principal trading firm capturing investment opportunities through technology and research across multiple asset classes while maintaining a collaborative, high-performance culture for employees.

Financial Services 🇺🇸 Chicago 2,463 n/a
61
University of Illinois Systemuillinois.edu

The company is a flagship public university system in Illinois, offering excellence in education, healthcare, research, and economic development to the community

Higher Education 🇺🇸 Urbana-Champaign 2,436 n/a
62
Gardner Denvergardnerdenver.com

Manufacturing energy efficient, reliable, and IoT connected compressors, blowers, and vacuum products for diverse industrial applications and processes.

Machinery Manufacturing 🇺🇸 Quincy 2,384 n/a
63
Shureshure.com

Designs and manufactures wired and wireless microphones, networked audio systems, signal processors, conferencing systems, and premium earphones and headphones.

Computers and Electronics Manufacturing 🇺🇸 Niles 2,320 1925
64
Omron Automationautomation.omron.com

The company specializes in automation technology to enhance performance, efficiency, and safety for manufacturing and infrastructure industries worldwide

Automation Machinery Manufacturing 🇺🇸 Hoffman Estates 2,300 1933
65
Life Fitness / Hammer Strengthlifefitness.com

A global leader in fitness solutions for over 45 years, inspiring healthier lives through cardio, strength, group training, and rehabilitation products

Wellness and Fitness Services 🇺🇸 Rosemont 2,264 n/a
66
Hendricksonhendrickson-intl.com

The company specializes in designing and manufacturing high-quality truck, tractor, and trailer suspensions, steel leaf springs, bumpers, and stamped components for the heavy-duty transportation market worldwide

Truck Transportation 🇺🇸 Woodridge 2,247 1913
67
Moenmoen.com

Designing and engineering innovative water products focused on enhancing user experience while promoting water conservation and efficiency.

Wholesale Building Materials 🇺🇸 Deerfield 2,211 n/a
68
Stepan Companystepan.com

A global manufacturer of specialty chemical products, Stepan collaborates with customers to provide innovative, high-quality solutions for various markets worldwide

Chemical Manufacturing 🇺🇸 Northbrook 2,210 1932
69
Knowles Corporationknowles.com

Designs and manufactures specialty electronic components like capacitors, RF filters, microphones, and balanced armatures for MedTech, Defense, and Industrial markets.

Appliances, Electrical, and Electronics Manufacturing 🇺🇸 Itasca 2,150 1946
70
Shirley Ryan AbilityLabsralab.org

Specializes in treating severe physical disabilities through integrated clinical care and research, improving recovery for complex conditions.

Hospitals and Health Care 🇺🇸 Chicago 2,124 1954
71
Newly Weds Foodsnewlywedsfoods.com

A global leader in food ingredient innovation, specializing in customized food coatings, seasonings, and sauces, with manufacturing facilities worldwide

Food and Beverage Manufacturing 🇺🇸 Chicago 2,123 1932
72
Flexeraflexera.com

Provides comprehensive visibility and actionable insights on entire IT ecosystems, enabling organizations to optimize spend, mitigate risk, and achieve positive business outcomes.

Software Development 🇺🇸 Itasca 2,096 2008
73
Wilson Sporting Goods Co.wilson.com

A leading manufacturer of high-performance sports equipment, apparel, and accessories, committed to helping athletes worldwide reach their true potential through innovative products

Sporting Goods Manufacturing 🇺🇸 Chicago 1,929 1914
74
Northwest Community Healthcareendeavorhealth.org

Endeavor Health is a united healthcare system providing personalized patient experiences and world-class care through convenient access and collaboration #OurEndeavor

Hospitals and Health Care 🇺🇸 Arlington Heights 1,916 n/a
75
Relativityrelativity.com

A software company offering RelativityOne, a SaaS product for data organization, truth discovery, and action during litigation and investigations in various sectors globally

Software Development 🇺🇸 Chicago 1,856 n/a
76
Fresenius Kabi USAfresenius-kabi.com

A global healthcare company specializing in Pharma, Nutrition, MedTech, and BioPharma products for critical and chronic conditions worldwide

Pharmaceutical Manufacturing 🇺🇸 Lake Zurich 1,759 n/a
77
Alere Inc.globalpointofcare.abbott

A global healthcare leader offering life-changing technologies in diagnostics, medical devices, nutritionals, and branded generic medicines with a presence in over 160 countries

Medical Equipment Manufacturing 🇺🇸 North Chicago 1,757 1981
78
Robertshawrobertshaw.com

Global engineering and manufacturing company specializing in product solutions for the white goods industry, with a diverse portfolio of controls for appliances

Appliances, Electrical, and Electronics Manufacturing 🇺🇸 Itasca 1,742 1899
79
Pregispregis.com

Global provider of protective packaging materials and systems for consumer and industrial markets, with a focus on sustainability and innovation

Packaging and Containers Manufacturing 🇺🇸 Chicago 1,682 1997
80
SRAMsram.com

Design and manufacture bicycle components such as shifters, derailleurs, brakes, chains, suspension, and power meters for global markets.

Manufacturing 🇺🇸 Chicago 1,608 1987
81
OSI Grouposigroup.com

Custom value-added food product development, global sourcing, processing, and distribution for leading foodservice and retail brands worldwide.

Food and Beverage Manufacturing 🇺🇸 Aurora 1,601 1909
82
American Dental Associationada.org

Advocates for dentists, dental science, public oral health. Provides resources for professionals, researches, and champions public health initiatives.

Non-profit Organizations 🇺🇸 Chicago 1,599 1859
83
Enova Internationalenova.com

A financial services company offering online lending to small businesses and underserved consumers, providing over $52 billion in loans

Financial Services 🇺🇸 Chicago 1,570 2004
84
Inventus Powerinventuspower.com

Design and manufacture advanced Li-ion battery packs, smart chargers, and power supplies for global OEMs across portable, motive, and stationary applications.

Appliances, Electrical, and Electronics Manufacturing 🇺🇸 Woodridge 1,564 1960
85
Basisbasis.com

Global provider of media automation and programmatic advertising software, streamlining and unifying digital campaigns through a centralized platform Headquarters in Chicago with strong workplace culture

Technology, Information and Media 🇺🇸 Chicago 1,477 n/a
86
Navico Groupnavico.com

Leading supplier of integrated systems in marine, recreational vehicle, and other industries Brands include marine electronics, power management, and digital control products

Manufacturing 🇺🇸 Mettawa 1,427 n/a
87
Filtration Groupfiltrationgroup.com

Global provider of innovative filtration consumables serving diverse industries including process technologies, life sciences, and specialty technologies worldwide.

Manufacturing 🇺🇸 Oakbrook Terrace 1,413 n/a
88
JBT FoodTechjbtc.com

Design, manufacture, and service customized industrial equipment for processing meat, seafood, poultry, bakery, dairy, juice, and packaged foods worldwide.

Machinery Manufacturing 🇺🇸 Chicago 1,407 n/a
89
JBT Corporationjbtc.com

Global technology solutions provider for food and beverage industry, specializing in processing equipment and automated guided vehicle systems for various applications

Machinery Manufacturing 🇺🇸 Chicago 1,380 1884
90
Wahl Clipper Corporationwahl.com

This company makes and markets electric hair clippers, massagers, beard trimmers, and accessories for professional, home, and animal use, selling globally through retailers and subsidiaries.

Manufacturing 🇺🇸 Sterling 1,054 1919
91
FUCHS LUBRICANTS CO.fuchs.com

Global leader in specialty lubricants, offering innovative products for various industries worldwide, with a focus on quality, innovation, and customer service

Chemical Manufacturing 🇺🇸 Harvey 1,349 1931
92
INX International Ink Co.inxinternational.com

A leading ink and coating supplier specializing in printing formulations for various applications, offering customizable solutions with a strong focus on digital printing integration

Chemical Manufacturing 🇺🇸 Schaumburg 1,332 1992
93
EPSepscca.com

This company provides high performance resins and colorants for coatings and adhesives industries, with a focus on customer success and innovation

Chemical Manufacturing 🇺🇸 Marengo 1,332 n/a
94
Mérieux NutriSciences - North Americamxns.com

Global food safety partner providing testing, labeling, auditing, consulting, and research services to the food industry worldwide, focusing on consumer health and scientific excellence

Biotechnology Research 🇺🇸 Chicago 1,301 1967
95
iManageimanage.com

The company provides an intelligent, cloud-enabled knowledge work platform using AI to uncover and activate organizational content for informed decisions and collaboration

Software Development 🇺🇸 Chicago 1,276 2015
96
Voyant Beautyvoyantbeauty.com

This company specializes in developing and manufacturing high-performance personal care and beauty products, offering marketing insights, ingredient research, and award-winning products

Personal Care Product Manufacturing 🇺🇸 Hodgkins 1,260 1989
97
Tropicana Brands Grouptropicanabrandsgroup.com

manages a global portfolio of iconic juice brands, focusing on innovation, manufacturing, distribution, sales, marketing, and nutrition expertise

Food and Beverage Services 🇺🇸 Chicago 1,253 2022
98
MAT Holdings, Inc.matholdingsinc.com

Engineering and manufacturing automotive castings, friction parts, suspension components, and consumer products like fencing, tools, and outdoor equipment.

Motor Vehicle Manufacturing 🇺🇸 Long Grove 1,200 1984
99
Dynacast Internationaldynacast.com

A global leader in high-quality die cast components for various industries, leveraging 80+ years of experience to deliver precision engineered metal components

Manufacturing 🇺🇸 Elgin 1,171 1936
100
Amsted Railamstedrail.com

Global manufacturer providing components and systems for freight cars and locomotives, alongside repair services, track maintenance, and monitoring solutions for heavy haul transportation industry worldwide

Railroad Equipment Manufacturing 🇺🇸 Chicago 1,160 n/a

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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 Nov 11, 2026.

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