| # | 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 | 104,899 | |
| 3 | 84,541 | |
| 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 |
United Airlinescareers.united.com
Leading airline with over 90,000 employees focused on customer service, sustainability, and teamwork, currently hiring 15,000 new team members in 2023 |
75,520 |
| 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 |
Cushman & Wakefieldcushmanwakefield.com
Global commercial real estate services provider with 52,000 professionals focused on advancing client, colleague, and community outcomes worldwide. |
53,000 |
| 8 |
CommonSpirit Healthcommonspirit.careers
A non-profit Catholic health system with 140 hospitals and 2,200 care centers, providing healthcare services to millions in 24 states |
47,364 |
| 9 |
YMCA of the USAymca.org
National resource office supporting independent YMCAs across the US by providing leadership, guidance, and resources to strengthen communities and promote youth development, health, and well-being |
46,444 |
| 10 | 42,789 | |
| 11 | 41,201 | |
| 12 |
Kraft Heinzkraftheinz.com
Producer of high-quality food and beverage products including condiments, dairy, meals, beverages, and nutrition items marketed worldwide. |
39,000 |
| 13 |
Chicago Public Schoolscps.edu
Provides education to over 340,000 students across more than 600 schools, focusing on college, career, and life readiness. |
38,314 |
| 14 |
Northern Trustnortherntrust.com
Global provider of innovative wealth management, asset servicing, and investment solutions for institutions, families, and individuals through diverse technology and financial expertise. |
30,965 |
| 15 | 29,989 | |
| 16 | 29,010 | |
| 17 |
Motorola Solutionsmotorolasolutions.com
The company builds and connects technologies to enhance public safety collaboration for safer communities, schools, hospitals, and businesses worldwide |
28,153 |
| 18 |
The Y (YMCA)ymca.org
We empower individuals regardless of age, income, or background to reach their full potential, improve well-being, and inspire action in communities |
27,727 |
| 19 | 27,213 | |
| 20 | 22,635 | |
| 21 |
Health Care Service Corporationhcsc.com
Provides health coverage for employers, individuals, and families, including Medicare and Medicaid plans, plus related health care products and services. |
21,090 |
| 22 |
Exelonexeloncorp.com
A leading utility company providing reliable and affordable energy to over 10 million customers in urban areas across multiple states, with a commitment to sustainability and community support |
20,291 |
| 23 |
RSM US LLPrsmus.com
Provider of assurance, tax, and consulting services focused on middle market clients with a global presence and professional development culture. |
19,700 |
| 24 |
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 |
| 25 |
University of Illinois Chicagouic.edu
A large university in Chicago with 33,000 students, 12,000 employees, 16 colleges, and a public medical center |
17,943 |
| 26 |
Hyatt Regencyregency.hyatt.com
Hyatt Regency hotels offer seamless connections for business and leisure travelers in over 30 countries, ensuring enthusiastic service and attention to detail |
17,551 |
| 27 |
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 |
| 28 |
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 |
| 29 |
Northwestern Medicinenm.org
Academic medical center combining research, teaching, and patient care with a large workforce across numerous regional locations and top-ranked hospitals. |
16,181 |
| 30 |
HUB Internationalhubinternational.com
Advises businesses and individuals on insurance, risk management, employee benefits, retirement, and wealth management with tailored solutions. |
16,129 |
| 31 |
Thoughtworksthoughtworks.com
A global technology consultancy specializing in strategy, design, and engineering to drive digital innovation, fostering diverse talent and a strong cultivation culture |
12,735 |
| 32 |
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 |
| 33 |
Molson Coors Beverage Companymolsoncoors.com
Global producer of beer, energy drinks, and canned cocktails including brands like Miller Lite and Blue Moon while promoting responsible alcohol consumption. |
12,299 |
| 34 |
Morningstarmorningstar.com
Independent investment insights, data, and research for various global markets including managed products, private capital, debt securities, and comprehensive asset management services. |
12,028 |
| 35 |
Levy Restaurantslevyrestaurants.com
Providing exceptional dining experiences with passionate hospitality across restaurants, stadiums, hotels, and special events worldwide, emphasizing personal pride and quality. |
11,972 |
| 36 |
Baker McKenziebakermckenzie.com
Provide practical legal advice combining local knowledge and international expertise to help businesses succeed across global markets. |
11,895 |
| 37 | 11,608 | |
| 38 |
Grant Thornton (US)grantthornton.com
Provides independent audit, tax, and advisory services through a global network, focusing on quality, trust, and strong client relationships. |
11,518 |
| 39 |
Bankers Lifecareersatbankerslife.com
The company provides insurance and investment solutions for middle-income Americans near or in retirement, with a focus on health and financial security |
11,377 |
| 40 | 11,182 | |
| 41 |
Baker Tilly USbakertilly.com
A leading advisory CPA firm with a coast-to-coast and global presence, part of Baker Tilly International network with 43,000 professionals |
10,594 |
| 42 |
Alight Solutionsalight.com
A leading provider of cloud-based human capital technology and services, empowering individuals to make confident health, wealth, and wellbeing decisions worldwide |
10,541 |
| 43 |
Grouponjob-boards.eu.greenhouse.io
An experiences marketplace offering local deals, live events, and travel options, helping people discover new experiences while assisting businesses in growing |
10,452 |
| 44 |
Help at Homehelpathome.com
Providing person-centered home care services for seniors and individuals with disabilities, creating meaningful moments and driving high-quality outcomes in multiple states |
10,421 |
| 45 |
Sears Storessears.com
Integrated retailer offering home merchandise, apparel, automotive products, and extensive home services through physical and digital retail formats. |
9,765 |
| 46 |
Aspen Dentalcareers.aspendental.com
Provides dental care and supports healthcare brands through a parent company, aiming for broader access and improved patient well-being nationwide. |
9,615 |
| 47 | 9,411 | |
| 48 |
Komatsu North Americakomatsu.com
This company specializes in providing technologies, equipment, and services for construction, mining, forklift, industrial, and forestry markets worldwide to enhance safety and promote productivity |
9,252 |
| 49 |
Kirkland & Elliskirkland.com
Providing top-tier legal services in corporate transactions, litigation, investigations, and asset management with global reach and innovative approach. |
8,683 |
| 50 |
LKQ Corporationlkqcorp.com
Largest provider of alternative collision, recycled, and remanufactured auto parts, plus specialty aftermarket equipment and accessories across multiple countries. |
8,450 |
| 51 |
UChicago Medicineuchicagomedicine.org
An academic medical institution providing innovative healthcare, medical education, and research through multiple hospitals, clinics, and partnerships in Chicago |
7,852 |
| 52 |
Conagra Brandsconagrabrands.com
Diverse team managing iconic and emerging food brands with a focus on innovation, integrity, and consistent business results. |
7,846 |
| 53 |
Kearneykearney.com
Global consulting firm with a focus on people, strategic operations, and building the future through teamwork and hands-on expertise in over 40 countries |
7,559 |
| 54 |
CNA Insurancecna.com
Provides commercial property and casualty insurance products and services for businesses and professionals across the U.S., Canada, and Europe. |
7,473 |
| 55 |
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 |
| 56 |
Loyola University Chicagoluc.edu
Private Jesuit Catholic university offering diverse undergraduate, graduate, and professional programs across multiple campuses including Chicago and Rome. |
7,315 |
| 57 |
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 |
| 58 |
SP+ (SP Plus)spplus.com
The company specializes in developing technology and operations management solutions for efficient movement of people, vehicles, and personal belongings |
7,185 |
| 59 |
Kemperkemper.com
Specialized insurer offering affordable personalized insurance solutions for individuals, families, and businesses through Auto and Life brands, serving over 49 million policies |
7,027 |
| 60 |
IGA, INC.corporate.iga.com
An affiliation of independent grocers offering technology, programs, partnerships, and support to increase sales and stay competitive |
6,938 |
| 61 |
Leo Burnettleoburnett.com
Global communications agency combining creativity, data, and technology to influence human behavior and drive client prosperity worldwide. |
6,825 |
| 62 |
Grubhubgrubhub.com
Connecting local restaurants with customers nationwide through an easy-to-use platform, delivering authentic cuisine and boosting business revenue. |
6,692 |
| 63 |
DePaul Universitydepaul.edu
Provides diverse, rigorous education with small classes, strong community partnerships, service learning, and support for first-generation students in Chicago. |
6,538 |
| 64 |
Chicago Transit Authoritytransitchicago.com
Provides affordable and quality transit services connecting people, jobs, and communities across Chicago and 35 surrounding suburbs daily. |
6,500 |
| 65 |
Huronhuronconsultinggroup.com
A global professional services firm specializing in strategy creation, operations optimization, digital transformation, and empowering businesses for sustainable results |
6,453 |
| 66 |
Accenture Strategy & Consultingaccenture.com
Combines deep industry expertise with advanced analytics and human-led design methodologies to help global clients act with speed and confidence throughout operations. |
6,217 |
| 67 |
Circanacircana.com
A company advising on consumer behavior complexity using advanced technology and analytics to help brands and retailers unlock business growth |
6,212 |
| 68 |
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 |
| 69 |
Great Wolf Lodgegreatwolf.com
Indoor water park resorts offering family entertainment, dining, retail, and career growth opportunities with exceptional service and fun environment. |
6,083 |
| 70 |
UScellularuscellular.com
A leading wireless carrier empowering employees to make a positive impact on customers and communities, with a focus on career advancement and a supportive culture |
6,067 |
| 71 |
Uber Freightuberfreight.com
Provides technology-driven freight transportation solutions connecting shippers and carriers to optimize logistics and improve supply chain efficiency. |
6,012 |
| 72 |
Eastersealseasterseals.com
The company provides disability and community services, healthcare, education, and employment opportunities to enhance quality of life and promote equity and inclusion |
5,813 |
| 73 | 5,752 | |
| 74 |
Starcomstarcomww.com
A global leader in communications planning and media, focused on putting people at the center to inspire and drive business forward through data and technology |
5,691 |
| 75 |
AMITA Healthadventhealth.com
Leading healthcare network in Illinois with 19 hospitals, 230+ outpatient sites, and a large provider network offering excellent care close to home |
5,689 |
| 76 |
Adtalem Global Educationcovista.com
A leading medical and healthcare education provider, focusing on workforce talent needs through education, certifications, upskilling programs with a diverse, inclusive approach |
5,688 |
| 77 |
Blue Cross Blue Shield Associationbcbs.com
Federation of independent Blue Cross and Blue Shield companies providing health care coverage and health insights for millions nationwide. |
5,630 |
| 78 | 5,564 | |
| 79 |
Continental Airlinesunited.com
A major US airline formed through a merger in 2010, offering a global route network, modern fleet, loyalty program, and airport hubs |
5,439 |
| 80 |
Ferraraferrarausa.com
A leading sugar confectionery company in the US, focused on driving category development with a diverse portfolio of iconic brands |
5,430 |
| 81 | 5,359 | |
| 82 |
Oak Street Health, part of CVS Healthoakstreethealth.com
Network of primary care centers focusing on personalized, value-based preventive care for older adults on Medicare across communities. |
5,183 |
| 83 |
Combined, a Chubb Benefits Companycombinedinsurance.com
Provider of supplemental accident, health, and life insurance products focused on affordable, clear, and easy-to-understand coverage for families. |
5,177 |
| 84 |
Sidley Austin LLPsidley.com
Providing comprehensive legal services worldwide, specializing in complex transactions, restructuring, investigations, regulatory, and litigation matters across multiple industries. |
5,113 |
| 85 |
Not applicable1n
Specializing in resolving page errors and providing technical support Contact for further information on services offered |
5,063 |
| 86 |
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 |
| 87 |
Bank of the Westbmo.com
Bank of the West, now part of the BMO Family, offers banking products and services through BMO Harris Bank NA Member FDIC |
4,892 |
| 88 |
EVERSANAeversana.com
Provider of global services to the life sciences industry, focusing on the patient experience and delivering value throughout the product life cycle Serving 650+ organizations |
4,836 |
| 89 |
CME Groupcmegroup.com
Global derivatives marketplace offering benchmark products across asset classes through electronic trading platforms and central counterparty clearing services for diverse financial risk management. |
4,781 |
| 90 |
The Walsh Group - Walsh Construction & Archer Westernwalshgroup.com
Family-owned construction company specializing in design, build, finance, operation across building, civil, transportation sectors with skilled workforce. |
4,597 |
| 91 |
Ryan Specialtyryanspecialty.com
International specialty insurance firm providing underwriting, product development, administration, risk management, and wholesale brokerage services for brokers and carriers. |
4,562 |
| 92 |
National Association of REALTORS®nar.realtor
America’s largest trade association representing 15 million real estate industry professionals Promotes diversity, respect, and fosters member-focused culture through social media engagement |
4,551 |
| 93 |
Mayer Brownmayerbrown.com
Representation of major corporations, funds, and financial institutions in complex transactions and disputes across international markets. |
4,544 |
| 94 |
Sargent & Lundysargentlundy.com
A global leader in architect engineering specializing in power, energy, and decarbonization, offering comprehensive project services to public and private clients |
4,511 |
| 95 |
The Heico Companies LLCheicocompanies.com
A privately held company with 74 separate acquisitions in manufacturing, construction, and industrial services, focused on growth and success |
4,427 |
| 96 |
Allscriptsveradigm.com
Healthcare technology company with a focus on transforming healthcare through innovative solutions Follow us at our new LinkedIn page |
4,337 |
| 97 |
American Bar Associationamericanbar.org
largest voluntary association of lawyers and legal professionals in the world, focused on advancing the legal profession. |
4,327 |
| 98 | 4,223 | |
| 99 |
Kraft Foodsonlinecareer360.com
A food production company headquartered in Chicago, Illinois, specializing in the manufacturing of a variety of food products |
4,213 |
| 100 | 4,160 |
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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 Oct 9, 2026.
More company lists in Chicago
- Financial Services companies in Chicago 152
- SaaS companies in Chicago 126
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- Real Estate companies in Chicago 62
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- Staffing and Recruiting companies in Chicago 25
The same list elsewhere in United States
- The largest companies in the United States 91,636
- The largest companies in New York 6,921
- The largest companies in San Francisco 2,031
- The largest companies in Houston 1,790
- The largest companies in Los Angeles 1,245
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- The largest companies in Boston 988
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