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# Companies in Chicago, IL

Pick an industry to see the bigger companies headquartered in Chicago, IL, what they do and how big they are.

By Enrich.chat Editorial. Updated October 22, 2026.

## Industries in Chicago

- [Real Estate Companies in Chicago](https://enrich.chat/companies-in/chicago-il/real-estate/): Real Estate
- [IT Services Companies in Chicago](https://enrich.chat/companies-in/chicago-il/it-services-and-it-consulting/): IT Services and IT Consulting
- [Financial Services Companies in Chicago](https://enrich.chat/companies-in/chicago-il/financial-services/): Financial Services
- [Advertising Agencies in Chicago](https://enrich.chat/companies-in/chicago-il/advertising-services/): Advertising Services
- [Software Companies in Chicago](https://enrich.chat/companies-in/chicago-il/software-development/): Software Development
- [Construction Companies in Chicago](https://enrich.chat/companies-in/chicago-il/construction/): Construction
- [Hospitals and Health Care Organizations in Chicago](https://enrich.chat/companies-in/chicago-il/hospitals-and-health-care/): Hospitals and Health Care
- [Consulting Firms in Chicago](https://enrich.chat/companies-in/chicago-il/business-consulting-and-services/): Business Consulting and Services
- [Nonprofit Organizations in Chicago](https://enrich.chat/companies-in/chicago-il/non-profit-organizations/): Non-profit Organizations
- [Law Firms in Chicago](https://enrich.chat/companies-in/chicago-il/law-practice/): Law Practice
- [Technology and Internet Companies in Chicago](https://enrich.chat/companies-in/chicago-il/technology-information-and-internet/): Technology; Information and Internet
- [Staffing and Recruiting Firms in Chicago](https://enrich.chat/companies-in/chicago-il/staffing-and-recruiting/): Staffing and Recruiting
- [Legal Services Firms in Chicago](https://enrich.chat/companies-in/chicago-il/legal-services/): Legal Services
- [Education Organizations in Chicago](https://enrich.chat/companies-in/chicago-il/education-administration-programs/): Education Administration Programs
- [Logistics and Supply Chain Companies in Chicago](https://enrich.chat/companies-in/chicago-il/transportation-logistics-supply-chain-and-storage/): Transportation; Logistics; Supply Chain and Storage
- [Colleges and Universities in Chicago](https://enrich.chat/companies-in/chicago-il/higher-education/): Higher Education
- [Insurance Companies in Chicago](https://enrich.chat/companies-in/chicago-il/insurance/): Insurance
- [Architecture Firms in Chicago](https://enrich.chat/companies-in/chicago-il/architecture-and-planning/): Architecture and Planning
- [Manufacturers in Chicago](https://enrich.chat/companies-in/chicago-il/manufacturing/): Manufacturing
- [Food and Beverage Manufacturers in Chicago](https://enrich.chat/companies-in/chicago-il/food-and-beverage-manufacturing/): Food and Beverage Manufacturing

**Short answer:** Browse the bigger companies headquartered in Chicago, IL by industry. Each page lists up to 25 of the biggest by headcount range, what they do and how big they are.

## Key takeaways

- Each page lists up to 25 of the biggest companies in one industry.
- Sizes are ranges, never exact headcounts.
- Ask your AI agent to use www.enrich.chat to find the people at any of them.

## Frequently asked questions

### How are the companies chosen?

Companies shown have a working website that matches their name and list Chicago, IL as their headquarters. The biggest by headcount range come first.