# 30 leading companies with a mobile app in Chicago

Tamtam tracks 75 companies with a mobile app headquartered in Chicago. This list ranks the 30 largest by number of employees on LinkedIn, led by McDonald's, Hyatt and United Airlines. Their median headcount is 3,698. Half of them were founded in 1977 or later.

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.

🇺🇸 Chicago · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [McDonald's](https://www.tamtam.ai/c/mcdonald-s) (corporate.mcdonalds.com)<br>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 |  |
| 2 | [Hyatt](https://www.tamtam.ai/c/hyatt) (hyatt.com)<br>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 |  |
| 3 | [United Airlines](https://www.tamtam.ai/c/united-airlines) (united.com)<br>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 |
| 4 | [Northern Trust](https://www.tamtam.ai/c/northern-trust) (northerntrust.com)<br>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 |
| 5 | [Motorola Mobility (a Lenovo Company)](https://www.tamtam.ai/c/motorola-mobility-a-lenovo-company) (motorola.com)<br>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 |
| 6 | [Northwestern Medicine](https://www.tamtam.ai/c/northwestern-medicine) (nm.org)<br>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 |  |
| 7 | [BMO U.S.](https://www.tamtam.ai/c/bmo-u-s) (bmo.com)<br>Providing personalized banking solutions through extensive branch network and dedicated team to support customers at every financial life stage. | Banking | 🇺🇸 Chicago | 11,608 |  |
| 8 | [Bank of the West - BMO](https://www.tamtam.ai/c/bank-of-the-west) (bmo.com)<br>Provides personal and commercial banking products and services for individuals and businesses, headquartered in California. | Banking | 🇺🇸 Chicago | 11,000 | 1874 |
| 9 | [Groupon](https://www.tamtam.ai/c/groupon) (job-boards.eu.greenhouse.io)<br>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 |
| 10 | [Grubhub](https://www.tamtam.ai/c/grubhub) (grubhub.com)<br>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 |
| 11 | [Chicago Transit Authority](https://www.tamtam.ai/c/chicago-transit-authority) (transitchicago.com)<br>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 |
| 12 | [Great Wolf Lodge](https://www.tamtam.ai/c/great-wolf-lodge) (greatwolf.com)<br>Indoor water park resorts offering family entertainment, dining, retail, and career growth opportunities with exceptional service and fun environment. | Hospitality | 🇺🇸 Chicago | 6,083 | 1997 |
| 13 | [Rate](https://www.tamtam.ai/c/rate) (rate.com)<br>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 |
| 14 | [National Association of REALTORS®](https://www.tamtam.ai/c/national-association-of-realtors) (nar.realtor)<br>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 |
| 15 | [Wyzant](https://www.tamtam.ai/c/wyzant) (wyzant.com)<br>Connecting individuals with over 80,000 tutors in 300+ subjects for tailored 1-to-1 lessons to help achieve academic and career goals | Technology, Information and Internet | 🇺🇸 Chicago | 3,698 |  |
| 16 | [Potbelly Sandwich Works](https://www.tamtam.ai/c/potbelly-sandwich-works) (potbelly.com)<br>A neighborhood sandwich shop known for oven-toasted sandwiches, soups, shakes, and cookies, offering fast, friendly service in a welcoming environment | Restaurants | 🇺🇸 Chicago | 3,397 | 1977 |
| 17 | [Echo Global Logistics](https://www.tamtam.ai/c/echo-global-logistics) (echo.com)<br>Provider of technology-driven freight brokerage and managed transportation solutions across multiple modes, simplifying supply chain management for diverse industries. | Transportation, Logistics, Supply Chain and Storage | 🇺🇸 Chicago | 2,874 | 2005 |
| 18 | [Applied Systems](https://www.tamtam.ai/c/applied-systems) (www1.appliedsystems.com)<br>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 |
| 19 | [UI Health](https://www.tamtam.ai/c/ui-health) (hospital.uillinois.edu)<br>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 |  |
| 20 | [Lettuce Entertain You Restaurants](https://www.tamtam.ai/c/lettuce-entertain-you-restaurants) (lettuce.com)<br>Owns, manages, and licenses over 110 restaurants across multiple states, offering diverse dining experiences from fast casual to fine dining concepts. | Restaurants | 🇺🇸 Chicago | 2,225 | 1971 |
| 21 | [L&W Supply](https://www.tamtam.ai/c/l-and-w-supply) (abcsupplyinteriors.com)<br>A nationwide distributor of gypsum wallboard and building materials, offering seamless service and access to products through local branches | Wholesale Building Materials | 🇺🇸 Chicago | 1,914 | 1972 |
| 22 | [CIBC US](https://www.tamtam.ai/c/cibc-us) (us.cibc.com)<br>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 | Financial Services | 🇺🇸 Chicago | 1,910 |  |
| 23 | [Sprout Social, Inc.](https://www.tamtam.ai/c/sprout-social-inc) (sproutsocial.com)<br>Global leader providing social media management, publishing, engagement, customer care, advocacy, and AI-powered business intelligence software to over thirty thousand brands worldwide. | Software Development | 🇺🇸 Chicago | 1,771 | 2010 |
| 24 | [American Hospital Association](https://www.tamtam.ai/c/american-hospital-association) (aha.org)<br>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 | Hospitals and Health Care | 🇺🇸 Chicago | 1,614 | 1898 |
| 25 | [SRAM](https://www.tamtam.ai/c/sram) (sram.com)<br>Design and manufacture bicycle components such as shifters, derailleurs, brakes, chains, suspension, and power meters for global markets. | Manufacturing | 🇺🇸 Chicago | 1,608 | 1987 |
| 26 | [American Dental Association](https://www.tamtam.ai/c/american-dental-association) (ada.org)<br>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 |
| 27 | [Advocate Illinois Masonic Medical Center](https://www.tamtam.ai/c/advocate-illinois-masonic-medical-center) (advocatehealth.com)<br>A Chicago-based 408-bed hospital offering comprehensive inpatient and outpatient medical services, including trauma care and neonatal intensive care | Hospitals and Health Care | 🇺🇸 Chicago | 1,237 |  |
| 28 | [Evangelical Lutheran Church in America](https://www.tamtam.ai/c/evangelical-lutheran-church-in-america) (elca.org)<br>A community of faith focused on spreading God's grace and love through worship, service, and education, making positive changes in the world | Religious Institutions | 🇺🇸 Chicago | 1,160 | 1988 |
| 29 | [ENY](https://www.tamtam.ai/c/eny) (enyping.com)<br>The platform allows users to share time-sensitive events, called Pings, with the public or a private group using hashtags | Technology, Information and Internet | 🇺🇸 Chicago | 1,131 | 2014 |
| 30 | [Byline Bank](https://www.tamtam.ai/c/byline-bank) (bylinebank.com)<br>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 | Financial Services | 🇺🇸 Chicago | 1,074 | 1914 |

## 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.

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## The same list elsewhere in United States

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Source: https://www.tamtam.ai/l/companies-with-mobile-app-chicago