The mobile app companies in Chicago include a mix of large, established corporations and younger tech firms. Notable examples are McDonald's, a global fast-food chain; Hyatt, managing luxury hotels; United Airlines, a major airline; and Northern Trust, a financial services provider. Motorola Mobility, known for smartphones, and Northwestern Medicine, an academic medical center, also feature prominently. The list also includes BMO U.S. and Bank of the West - BMO, both offering banking solutions. Groupon, an experiences marketplace, and Grubhub, a food delivery platform, represent the technology sector. The Chicago Transit Authority provides urban transit services, while Great Wolf Lodge operates indoor water park resorts. Rate focuses on residential mortgage services, and the National Association of REALTORS® represents real estate professionals. Wyzant connects individuals with tutors for various subjects.
| # | 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 | 84,541 | ||||
| 3 |
United Airlinesunited.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 | |||
| 4 |
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 | |||
| 5 |
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 | |||
| 6 |
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 | |||
| 7 | 11,608 | ||||
| 8 |
Bank of the West - BMObmo.com
Provides personal and commercial banking products and services for individuals and businesses, headquartered in California. |
11,000 | |||
| 9 |
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 | |||
| 10 |
Grubhubgrubhub.com
Connecting local restaurants with customers nationwide through an easy-to-use platform, delivering authentic cuisine and boosting business revenue. |
6,692 | |||
| 11 |
Chicago Transit Authoritytransitchicago.com
Provides affordable and quality transit services connecting people, jobs, and communities across Chicago and 35 surrounding suburbs daily. |
6,500 | |||
| 12 |
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 | |||
| 13 | 5,564 | ||||
| 14 |
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 | |||
| 15 |
Wyzantwyzant.com
Connecting individuals with over 80,000 tutors in 300+ subjects for tailored 1-to-1 lessons to help achieve academic and career goals |
3,698 | |||
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. | |||||
| 16 |
Potbelly Sandwich Workspotbelly.com
A neighborhood sandwich shop known for oven-toasted sandwiches, soups, shakes, and cookies, offering fast, friendly service in a welcoming environment |
3,397 | |||
| 17 |
Echo Global Logisticsecho.com
Provider of technology-driven freight brokerage and managed transportation solutions across multiple modes, simplifying supply chain management for diverse industries. |
2,874 | |||
| 18 |
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 | |||
| 19 |
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 | |||
| 20 |
Lettuce Entertain You Restaurantslettuce.com
Owns, manages, and licenses over 110 restaurants across multiple states, offering diverse dining experiences from fast casual to fine dining concepts. |
2,225 | |||
| 21 |
L&W Supplyabcsupplyinteriors.com
A nationwide distributor of gypsum wallboard and building materials, offering seamless service and access to products through local branches |
1,914 | |||
| 22 |
CIBC USus.cibc.com
This company provides a range of banking services including commercial & personal banking, wealth management, and small business financial solutions They are an Equal Housing Lender and Member FDIC |
1,910 | |||
| 23 |
Sprout Social, Inc.sproutsocial.com
Global leader providing social media management, publishing, engagement, customer care, advocacy, and AI-powered business intelligence software to over thirty thousand brands worldwide. |
1,771 | |||
| 24 |
American Hospital Associationaha.org
National organization representing hospitals, health care networks, and patients Advocates for members in health policy, legislative debates, and regulatory matters Visit website for more information |
1,614 | |||
| 25 | 1,608 | ||||
| 26 |
American Dental Associationada.org
Advocates for dentists, dental science, public oral health. Provides resources for professionals, researches, and champions public health initiatives. |
1,599 | |||
| 27 |
Advocate Illinois Masonic Medical Centeradvocatehealth.com
A Chicago-based 408-bed hospital offering comprehensive inpatient and outpatient medical services, including trauma care and neonatal intensive care |
1,237 | |||
| 28 |
Evangelical Lutheran Church in Americaelca.org
A community of faith focused on spreading God's grace and love through worship, service, and education, making positive changes in the world |
1,160 | |||
| 29 |
ENYenyping.com
The platform allows users to share time-sensitive events, called Pings, with the public or a private group using hashtags |
1,131 | |||
| 30 |
Byline Bankbylinebank.com
A long-standing resident of Chicago, this company offers innovative banking products and services dedicated to helping clients succeed They prioritize transparency, personalization, and keeping promises |
1,074 | |||
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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 Nov 11, 2026.
More company lists in Chicago
- The largest companies in Chicago 1,860
- Multinational companies in Chicago 366
- Financial services firms in Chicago 212
- Professional services firms in Chicago 196
- Financial Services companies in Chicago 185
- Education providers in Chicago 138
- SaaS companies in Chicago 132
- Consulting firms in Chicago 127
- IT Services and IT Consulting companies in Chicago 115
- IT services companies in Chicago 114
- Venture capital and private equity firms in Chicago 106
- AI companies in Chicago 100
- Hospitals and Health Care companies in Chicago 99
- Software Development companies in Chicago 97
- Manufacturers in Chicago 97
- Companies with in-house R&D in Chicago 93
- Subscription businesses in Chicago 92
- Healthcare providers in Chicago 86
- Retail chains in Chicago 84
- Critical infrastructure operators in Chicago 74
- Publicly traded companies in Chicago 71
- Real Estate companies in Chicago 67
- Non-profit Organizations companies in Chicago 66
- Corporate groups and holding companies in Chicago 64
The same list elsewhere in United States
- Companies with a mobile app in the United States 4,663
- Companies with a mobile app in California 827
- Companies with a mobile app in New York State 491
- Companies with a mobile app in Texas 366
- Companies with a mobile app in Florida 284
- Companies with a mobile app in Illinois 178
- Companies with a mobile app in Massachusetts 159
- Companies with a mobile app in Alabama 156
- Companies with a mobile app in Pennsylvania 130
- Companies with a mobile app in Washington State 128
- Companies with a mobile app in Georgia 117
- Companies with a mobile app in Ohio 114
- Companies with a mobile app in New Jersey 113
- Companies with a mobile app in Colorado 100
- Companies with a mobile app in North Carolina 96
- Companies with a mobile app in Michigan 95
- Companies with a mobile app in Virginia 93
- Companies with a mobile app in Arizona 87
- Companies with a mobile app in Minnesota 84
- Companies with a mobile app in Missouri 78
- Companies with a mobile app in Utah 78
- Companies with a mobile app in New York 371
- Companies with a mobile app in San Francisco 238
- Companies with a mobile app in Los Angeles 81