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The 100 largest companies in Chicago

Tamtam tracks 1,669 companies headquartered in Chicago. This list ranks the 100 largest by number of employees on LinkedIn, led by McDonald's, JLL and Hyatt. Their median headcount is 8,450. Half of them were founded in 1924 or later.

🇺🇸 Chicago100 companiesUpdated Oct 9, 2026
#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
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
3
Hyatthyatt.com

Global management of luxury hotels and all-inclusive resorts across six continents including vacation clubs, loyalty programs, destination management services, and travel technology solutions.

Hospitality 🇺🇸 Chicago 84,541 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
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

Airlines and Aviation 🇺🇸 Chicago 75,520 1926
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
Cushman & Wakefieldcushmanwakefield.com

Global commercial real estate services provider with 52,000 professionals focused on advancing client, colleague, and community outcomes worldwide.

Real Estate 🇺🇸 Chicago 53,000 1917
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

Hospitals and Health Care 🇺🇸 Chicago 47,364 n/a
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

Non-profit Organizations 🇺🇸 Chicago 46,444 1851
10
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
11
RRDrrd.com

Global provider of marketing, packaging, print, and supply chain solutions, focusing on elevating customer engagement with creative execution and environmental impact reduction

Marketing Services 🇺🇸 Chicago 41,201 n/a
12
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
13
Chicago Public Schoolscps.edu

Provides education to over 340,000 students across more than 600 schools, focusing on college, career, and life readiness.

Education Administration Programs 🇺🇸 Chicago 38,314 1837
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.

Financial Services 🇺🇸 Chicago 30,965 1889
15
NielsenIQniq.com

A leading consumer intelligence company offering comprehensive consumer insights, advanced analytics, and global retail data to drive growth opportunities

Information Services 🇺🇸 Chicago 29,989 1923
16
HGShgs.cx

A global leader in customer experience optimization, digital transformation, and business process management, combining automation, analytics, and AI to drive competitiveness

IT Services and IT Consulting 🇺🇸 Chicago 29,010 n/a
17
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
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

Non-profit Organizations 🇺🇸 Chicago 27,727 1844
19
Searsbit.ly

Leading integrated retailer offering digital and physical shopping experiences plus nationwide home services and member rewards through a social shopping platform.

Retail 🇺🇸 Chicago 27,213 1892
20
R1 RCMr1rcm.com

Technology-driven healthcare solutions provider improving healthcare for providers and patients Great Place to Work® Certified™ organization fostering professional growth and impact

Hospitals and Health Care 🇺🇸 Chicago 22,635 2003
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.

Hospitals and Health Care 🇺🇸 Chicago 21,090 1936
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

Utilities 🇺🇸 Chicago 20,291 n/a
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.

Accounting 🇺🇸 Chicago 19,700 1926
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

Higher Education 🇺🇸 Chicago 18,526 n/a
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

Higher Education 🇺🇸 Chicago 17,943 1965
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

Hospitality 🇺🇸 Chicago 17,551 n/a
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

Computers and Electronics Manufacturing 🇺🇸 Chicago 17,456 1928
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

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

Hospitals and Health Care 🇺🇸 Chicago 16,181 n/a
30
HUB Internationalhubinternational.com

Advises businesses and individuals on insurance, risk management, employee benefits, retirement, and wealth management with tailored solutions.

Insurance 🇺🇸 Chicago 16,129 n/a
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

IT Services and IT Consulting 🇺🇸 Chicago 12,735 n/a
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.

Hospitals and Health Care 🇺🇸 Chicago 12,484 n/a
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.

Food and Beverage Services 🇺🇸 Chicago 12,299 1786
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.

Financial Services 🇺🇸 Chicago 12,028 1984
35
Levy Restaurantslevyrestaurants.com

Providing exceptional dining experiences with passionate hospitality across restaurants, stadiums, hotels, and special events worldwide, emphasizing personal pride and quality.

Food and Beverage Services 🇺🇸 Chicago 11,972 n/a
36
Baker McKenziebakermckenzie.com

Provide practical legal advice combining local knowledge and international expertise to help businesses succeed across global markets.

Law Practice 🇺🇸 Chicago 11,895 n/a
37
BMO U.S.bmo.com

Providing personalized banking solutions through extensive branch network and dedicated team to support customers at every financial life stage.

Banking 🇺🇸 Chicago 11,608 n/a
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.

Professional Services 🇺🇸 Chicago 11,518 1924
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

Insurance 🇺🇸 Chicago 11,377 1879
40
BDO USAbdo.com

Providing middle market leaders with assurance, tax, and advisory services focused on cultivating a people-centered, growth-oriented corporate culture.

Accounting 🇺🇸 Chicago 11,182 1910
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

Accounting 🇺🇸 Chicago 10,594 n/a
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

Human Resources Services 🇺🇸 Chicago 10,541 n/a
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

Software Development 🇺🇸 Chicago 10,452 2008
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

Hospitals and Health Care 🇺🇸 Chicago 10,421 1975
45
Sears Storessears.com

Integrated retailer offering home merchandise, apparel, automotive products, and extensive home services through physical and digital retail formats.

Retail 🇺🇸 Chicago 9,765 1886
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.

Hospitals and Health Care 🇺🇸 Chicago 9,615 1998
47
Crowecrowe.com

A global firm providing public accounting, consulting, and technology services, helping clients make smart decisions and uncover hidden opportunities worldwide

Professional Services 🇺🇸 Chicago 9,411 n/a
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

Machinery Manufacturing 🇺🇸 Chicago 9,252 n/a
49
Kirkland & Elliskirkland.com

Providing top-tier legal services in corporate transactions, litigation, investigations, and asset management with global reach and innovative approach.

Law Practice 🇺🇸 Chicago 8,683 1909
50
LKQ Corporationlkqcorp.com

Largest provider of alternative collision, recycled, and remanufactured auto parts, plus specialty aftermarket equipment and accessories across multiple countries.

Motor Vehicle Manufacturing 🇺🇸 Chicago 8,450 1998
51
UChicago Medicineuchicagomedicine.org

An academic medical institution providing innovative healthcare, medical education, and research through multiple hospitals, clinics, and partnerships in Chicago

Hospitals and Health Care 🇺🇸 Chicago 7,852 1898
52
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
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

Business Consulting and Services 🇺🇸 Chicago 7,559 1926
54
CNA Insurancecna.com

Provides commercial property and casualty insurance products and services for businesses and professionals across the U.S., Canada, and Europe.

Insurance 🇺🇸 Chicago 7,473 1897
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

Hospitals and Health Care 🇺🇸 Chicago 7,371 n/a
56
Loyola University Chicagoluc.edu

Private Jesuit Catholic university offering diverse undergraduate, graduate, and professional programs across multiple campuses including Chicago and Rome.

Higher Education 🇺🇸 Chicago 7,315 1870
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.

Hospitals and Health Care 🇺🇸 Chicago 7,202 n/a
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

Facilities Services 🇺🇸 Chicago 7,185 1929
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

Insurance 🇺🇸 Chicago 7,027 1990
60
IGA, INC.corporate.iga.com

An affiliation of independent grocers offering technology, programs, partnerships, and support to increase sales and stay competitive

Retail 🇺🇸 Chicago 6,938 1926
61
Leo Burnettleoburnett.com

Global communications agency combining creativity, data, and technology to influence human behavior and drive client prosperity worldwide.

Advertising Services 🇺🇸 Chicago 6,825 n/a
62
Grubhubgrubhub.com

Connecting local restaurants with customers nationwide through an easy-to-use platform, delivering authentic cuisine and boosting business revenue.

Technology, Information and Internet 🇺🇸 Chicago 6,692 2004
63
DePaul Universitydepaul.edu

Provides diverse, rigorous education with small classes, strong community partnerships, service learning, and support for first-generation students in Chicago.

Higher Education 🇺🇸 Chicago 6,538 1898
64
Chicago Transit Authoritytransitchicago.com

Provides affordable and quality transit services connecting people, jobs, and communities across Chicago and 35 surrounding suburbs daily.

Urban Transit Services 🇺🇸 Chicago 6,500 1947
65
Huronhuronconsultinggroup.com

A global professional services firm specializing in strategy creation, operations optimization, digital transformation, and empowering businesses for sustainable results

Business Consulting and Services 🇺🇸 Chicago 6,453 2002
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.

Business Consulting and Services 🇺🇸 Chicago 6,217 n/a
67
Circanacircana.com

A company advising on consumer behavior complexity using advanced technology and analytics to help brands and retailers unlock business growth

Market Research 🇺🇸 Chicago 6,212 2023
68
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
69
Great Wolf Lodgegreatwolf.com

Indoor water park resorts offering family entertainment, dining, retail, and career growth opportunities with exceptional service and fun environment.

Hospitality 🇺🇸 Chicago 6,083 1997
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

Telecommunications 🇺🇸 Chicago 6,067 n/a
71
Uber Freightuberfreight.com

Provides technology-driven freight transportation solutions connecting shippers and carriers to optimize logistics and improve supply chain efficiency.

Transportation, Logistics, Supply Chain and Storage 🇺🇸 Chicago 6,012 n/a
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

Individual and Family Services 🇺🇸 Chicago 5,813 1919
73
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
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

Advertising Services 🇺🇸 Chicago 5,691 n/a
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

Hospitals and Health Care 🇺🇸 Chicago 5,689 n/a
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

Education Administration Programs 🇺🇸 Chicago 5,688 n/a
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.

Insurance 🇺🇸 Chicago 5,630 1910
78
Raterate.com

Residential mortgage and finance services providing quick loan approvals and licensing across multiple states including Arizona, California, New York, and New Jersey.

Financial Services 🇺🇸 Chicago 5,564 2000
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

Airlines and Aviation 🇺🇸 Chicago 5,439 n/a
80
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
81
ComEdcomed.com

The company provides electricity to over 4 million customers in northern Illinois, focusing on safety, reliability, innovation, and customer empowerment

Utilities 🇺🇸 Chicago 5,359 n/a
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.

Hospitals and Health Care 🇺🇸 Chicago 5,183 2012
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.

Insurance 🇺🇸 Chicago 5,177 1922
84
Sidley Austin LLPsidley.com

Providing comprehensive legal services worldwide, specializing in complex transactions, restructuring, investigations, regulatory, and litigation matters across multiple industries.

Law Practice 🇺🇸 Chicago 5,113 1866
85
Not applicable1n

Specializing in resolving page errors and providing technical support Contact for further information on services offered

Writing and Editing 🇺🇸 Chicago 5,063 n/a
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

Wholesale Building Materials 🇺🇸 Chicago 5,022 n/a
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

Business Consulting and Services 🇺🇸 Chicago 4,892 1817
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

Pharmaceutical Manufacturing 🇺🇸 Chicago 4,836 2018
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.

Financial Services 🇺🇸 Chicago 4,781 n/a
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.

Construction 🇺🇸 Chicago 4,597 1898
91
Ryan Specialtyryanspecialty.com

International specialty insurance firm providing underwriting, product development, administration, risk management, and wholesale brokerage services for brokers and carriers.

Insurance 🇺🇸 Chicago 4,562 2010
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

Real Estate 🇺🇸 Chicago 4,551 1908
93
Mayer Brownmayerbrown.com

Representation of major corporations, funds, and financial institutions in complex transactions and disputes across international markets.

Law Practice 🇺🇸 Chicago 4,544 n/a
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

Professional Services 🇺🇸 Chicago 4,511 1891
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

Venture Capital and Private Equity Principals 🇺🇸 Chicago 4,427 1979
96
Allscriptsveradigm.com

Healthcare technology company with a focus on transforming healthcare through innovative solutions Follow us at our new LinkedIn page

Software Development 🇺🇸 Chicago 4,337 1986
97
American Bar Associationamericanbar.org

largest voluntary association of lawyers and legal professionals in the world, focused on advancing the legal profession.

Legal Services 🇺🇸 Chicago 4,327 1878
98
AHEADahead.com

This company specializes in building and managing digital platforms for successful organizations, accelerating the impact of technology through innovative solutions and engineering expertise

IT Services and IT Consulting 🇺🇸 Chicago 4,223 n/a
99
Kraft Foodsonlinecareer360.com

A food production company headquartered in Chicago, Illinois, specializing in the manufacturing of a variety of food products

Food and Beverage Manufacturing 🇺🇸 Chicago 4,213 n/a
100
HAVIhavi.com

A global company providing sourcing, supply chain solutions, digital analytics, marketing services, and consumer products to connect people with their favorite products worldwide

Holding Companies 🇺🇸 Chicago 4,160 1974

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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.

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