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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 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 |
261,219 | |||
| 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 |
140,778 | |||
| 3 | 104,899 | ||||
| 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. |
79,000 | |||
| 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 |
61,015 | |||
| 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 |
60,041 | |||
| 7 |
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 | |||
| 8 | 42,789 | ||||
| 9 |
Baxter International Inc.baxter.com
Development and delivery of innovative medical technologies and solutions to support clinicians and improve patient health worldwide. |
39,170 | |||
| 10 |
Kraft Heinzkraftheinz.com
Producer of high-quality food and beverage products including condiments, dairy, meals, beverages, and nutrition items marketed worldwide. |
39,000 | |||
| 11 |
Motorola Solutionsmotorolasolutions.com
The company builds and connects technologies to enhance public safety collaboration for safer communities, schools, hospitals, and businesses worldwide |
28,153 | |||
| 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. |
24,692 | |||
| 13 |
ITWcareers.itw.com
Global multi-industrial manufacturing leader driving solid growth with innovative solutions, emphasizing decentralized culture |
18,709 | |||
| 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 |
18,526 | |||
| 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 |
17,456 | |||
| 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 |
17,036 | |||
| 17 | 14,810 | ||||
| 18 |
UL Solutionsul.com
Global provider of safety testing, certification, inspection, auditing, and advisory services ensuring product security, sustainability, and market trust. |
14,487 | |||
| 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 |
12,751 | |||
| 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. |
12,484 | |||
| 21 |
Zebra Technologieszebra.com
Improving workflows through innovative technology solutions, connecting frontline workers and optimizing visibility with scanning, track-and-trace, and automation tools |
11,698 | |||
| 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. |
11,676 | |||
| 23 |
Internationalinternational.com
Manufacture durable trucks, engines, and buses with aftermarket parts, focusing on uptime, productivity, and sustainable mobility solutions. |
10,420 | |||
| 24 |
Brunswick Corporationbrunswick.com
Global leader in marine recreation offering propulsion systems, boats, marine technology, parts, accessories, and related services worldwide. |
9,409 | |||
| 25 | 7,968 | ||||
| 26 |
Conagra Brandsconagrabrands.com
Diverse team managing iconic and emerging food brands with a focus on innovation, integrity, and consistent business results. |
7,846 | |||
| 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 |
7,371 | |||
| 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. |
7,202 | |||
| 29 |
Paylocitypaylocity.com
Award-winning provider of cloud-based HR and payroll software solutions, helping businesses automate processes, attract talent, and build employee connections |
7,046 | |||
| 30 |
Navistar Incinternational.com
Manufacturing and selling commercial trucks, focusing on heavy-duty vehicles and returning to the International brand identity. |
6,795 | |||
| 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 |
6,338 | |||
| 32 |
Kellanovakellanova.com
A global powerhouse in snacks, cereal, noodles, and frozen foods, committed to creating better days and promoting sustainable access to food |
6,197 | |||
| 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 |
6,096 | |||
| 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. |
5,857 | |||
| 35 | 5,752 | ||||
| 36 |
Ferraraferrarausa.com
A leading sugar confectionery company in the US, focused on driving category development with a diverse portfolio of iconic brands |
5,430 | |||
| 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 |
5,181 | |||
| 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 |
5,022 | |||
| 39 |
Panduitpanduit.com
The company provides innovative electrical and network infrastructure solutions, serving as a trusted advisor in Data Center, Enterprise, and Industrial environments |
4,640 | |||
| 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 |
4,009 | |||
| 41 |
CTS Corporationctscorp.com
Design and manufacture sensors, actuators, and electronic components for OEMs across diverse industries, focusing on innovative, quality technology solutions. |
3,953 | |||
| 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 |
3,815 | |||
| 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. |
3,755 | |||
| 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 |
3,554 | |||
| 45 |
Griffith Foodsgriffithfoods.com
Global food company specializing in creative product development, partnering with customers to meet consumer needs while respecting the planet. |
3,448 | |||
| 46 |
Midwestern Universitymidwestern.edu
Not-for-profit graduate institution offering health science degrees including medicine, pharmacy, therapy, psychology, nursing, dentistry, optometry, and veterinary medicine |
3,419 | |||
| 47 |
IDEX Corporationidexcorp.com
The company manufactures mission-critical components used in everyday activities such as automotive safety, emergency rescue tools, and medical equipment |
3,315 | |||
| 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 |
3,061 | |||
| 49 |
Tempus AItempus.com
Utilizing AI and data analytics, the company empowers physicians to personalize patient care with real-time insights and targeted therapies |
3,051 | |||
| 50 |
Methode Electronicsmethode.com
Designs, engineers, produces mechatronic products for OEMs, utilizing broad technologies for user interface, LED lighting, power distribution, and sensor applications. |
3,043 | |||
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 |
JBT Mareljbtmarel.com
Provider of integrated technology, equipment, software, and services for food and beverage industries, supporting diverse product sectors worldwide. |
2,852 | |||
| 52 |
Applied Systemswww1.appliedsystems.com
A leading provider of innovative cloud software for the insurance industry, driving transformation through digitization, automation, and new partnerships |
2,813 | |||
| 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 |
2,813 | |||
| 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 |
2,781 | |||
| 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 |
2,761 | |||
| 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. |
2,737 | |||
| 57 |
Fortune Brands Innovationsfbin.com
Designs and manufactures water innovations, outdoor living products, security solutions, and kitchen and bath cabinets for homeowners. |
2,603 | |||
| 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 |
2,533 | |||
| 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 |
2,525 | |||
| 60 | 2,463 | ||||
| 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 |
2,436 | |||
| 62 |
Gardner Denvergardnerdenver.com
Manufacturing energy efficient, reliable, and IoT connected compressors, blowers, and vacuum products for diverse industrial applications and processes. |
2,384 | |||
| 63 | 2,320 | ||||
| 64 |
Omron Automationautomation.omron.com
The company specializes in automation technology to enhance performance, efficiency, and safety for manufacturing and infrastructure industries worldwide |
2,300 | |||
| 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 |
2,264 | |||
| 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 |
2,247 | |||
| 67 | 2,211 | ||||
| 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 |
2,210 | |||
| 69 |
Knowles Corporationknowles.com
Designs and manufactures specialty electronic components like capacitors, RF filters, microphones, and balanced armatures for MedTech, Defense, and Industrial markets. |
2,150 | |||
| 70 |
Shirley Ryan AbilityLabsralab.org
Specializes in treating severe physical disabilities through integrated clinical care and research, improving recovery for complex conditions. |
2,124 | |||
| 71 |
Newly Weds Foodsnewlywedsfoods.com
A global leader in food ingredient innovation, specializing in customized food coatings, seasonings, and sauces, with manufacturing facilities worldwide |
2,123 | |||
| 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. |
2,096 | |||
| 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 |
1,929 | |||
| 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 |
1,916 | |||
| 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 |
1,856 | |||
| 76 |
Fresenius Kabi USAfresenius-kabi.com
A global healthcare company specializing in Pharma, Nutrition, MedTech, and BioPharma products for critical and chronic conditions worldwide |
1,759 | |||
| 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 |
1,757 | |||
| 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 |
1,742 | |||
| 79 |
Pregispregis.com
Global provider of protective packaging materials and systems for consumer and industrial markets, with a focus on sustainability and innovation |
1,682 | |||
| 80 | 1,608 | ||||
| 81 |
OSI Grouposigroup.com
Custom value-added food product development, global sourcing, processing, and distribution for leading foodservice and retail brands worldwide. |
1,601 | |||
| 82 |
American Dental Associationada.org
Advocates for dentists, dental science, public oral health. Provides resources for professionals, researches, and champions public health initiatives. |
1,599 | |||
| 83 |
Enova Internationalenova.com
A financial services company offering online lending to small businesses and underserved consumers, providing over $52 billion in loans |
1,570 | |||
| 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. |
1,564 | |||
| 85 | 1,477 | ||||
| 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 |
1,427 | |||
| 87 |
Filtration Groupfiltrationgroup.com
Global provider of innovative filtration consumables serving diverse industries including process technologies, life sciences, and specialty technologies worldwide. |
1,413 | |||
| 88 |
JBT FoodTechjbtc.com
Design, manufacture, and service customized industrial equipment for processing meat, seafood, poultry, bakery, dairy, juice, and packaged foods worldwide. |
1,407 | |||
| 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 |
1,380 | |||
| 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. |
1,054 | |||
| 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 |
1,349 | |||
| 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 |
1,332 | |||
| 93 |
EPSepscca.com
This company provides high performance resins and colorants for coatings and adhesives industries, with a focus on customer success and innovation |
1,332 | |||
| 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 |
1,301 | |||
| 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 |
1,276 | |||
| 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 |
1,260 | |||
| 97 |
Tropicana Brands Grouptropicanabrandsgroup.com
manages a global portfolio of iconic juice brands, focusing on innovation, manufacturing, distribution, sales, marketing, and nutrition expertise |
1,253 | |||
| 98 |
MAT Holdings, Inc.matholdingsinc.com
Engineering and manufacturing automotive castings, friction parts, suspension components, and consumer products like fencing, tools, and outdoor equipment. |
1,200 | |||
| 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 |
1,171 | |||
| 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 |
1,160 | |||
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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.
More company lists in Illinois
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- Education providers in Illinois 370
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- Hospitals and Health Care companies in Illinois 280
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The same list elsewhere in United States
- Companies with in-house R&D in the United States 6,796
- 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 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