> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/523940/illinois/ # NAICS 523940 companies in Illinois Companies with NAICS code 523940 (Portfolio Management and Investment Advice) headquartered in Illinois, with their cities, sizes and SIC codes. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** The biggest NAICS 523940 companies in Illinois by headcount range include Morningstar, Wintrust Financial and The Scion Group. NAICS 523940 is the code for Portfolio Management and Investment Advice. Among those counted, they are mostly very small: 67% have 50 or fewer employees. ## Which NAICS 523940 companies are in Illinois? The biggest by headcount range include Morningstar, Wintrust Financial, The Scion Group, Zacks Investment Research and Heitman. NAICS 523940 is the code for Portfolio Management and Investment Advice. Names link to a company profile where we have one. | Company | City | Employees | | --- | --- | --- | | [Morningstar](https://enrich.chat/company/morningstar/) | Chicago | 10,001+ | | Wintrust Financial | Rosemont | 5,001 to 10,000 | | The Scion Group | Chicago | 1,001 to 5,000 | | Zacks Investment Research | Chicago | 201 to 500 | | Heitman | Chicago | 201 to 500 | | Calamos Investments | Naperville | 201 to 500 | | Westward360 | Chicago | 201 to 500 | | Wintrust Wealth Management | Chicago | 201 to 500 | | Origin Investments | Chicago | 51 to 200 | | Brookstone Capital Management | Wheaton | 51 to 200 | | Marquette Associates | Chicago | 51 to 200 | | Rothschild Investment | Chicago | 51 to 200 | | Altair Advisers | Chicago | 51 to 200 | | North Square Investments | Chicago | 51 to 200 | | Thg Financial Strategies | Lincolnshire | 51 to 200 | | Retirement Plan Advisors | Chicago | 51 to 200 | | Alliance Pension Consultants | Deerfield | 51 to 200 | | Monotelo Advisors | Elgin | 51 to 200 | | Nextgen Growth Partners | Chicago | 11 to 50 | | Core Industrial Partners | Chicago | 11 to 50 | | Capstone Financial Advisors | Downers Grove | 11 to 50 | | Dolan Mceniry Capital Management | Chicago | 11 to 50 | | Channing Capital Management | Chicago | 11 to 50 | | Waller Helms Advisors | Chicago | 11 to 50 | | Up Campus Student Living | Chicago | 11 to 50 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## How big are they? 67% of the NAICS 523940 companies counted in Illinois have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of NAICS 523940 companies in Illinois.** Seven columns for the share of counted NAICS 523940 companies in Illinois in each employee range: 11 to 50 67%, 51 to 200 18%, 201 to 500 9%, 501 to 1,000 0%, 1,001 to 5,000 2%, 5,001 to 10,000 2%, 10,001+ 2%. *Share of counted NAICS 523940 companies in Illinois in each employee range.* ## Which SIC codes do they carry? The older SIC system and NAICS do not line up one to one. These are the SIC codes seen most here. **Figure: SIC codes of NAICS 523940 companies in Illinois.** Bars for the share of counted NAICS 523940 companies in Illinois with each code: 6282 80%, 6211 5%, 6531 5%, 6411 4%, 6799 4%. *Share of counted NAICS 523940 companies in Illinois by their SIC code.* ## How do you reach the people at these Illinois companies? The people to talk to are usually finance, operations and technology leaders. Build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 523940 in Illinois ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the finance, operations and technology leaders at companies with NAICS code 523940 in Illinois, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore About the code: [NAICS 523940: Portfolio Management and Investment Advice](https://enrich.chat/naics/523940/). About the place: [companies in Illinois](https://enrich.chat/companies-in/illinois/). NAICS 523940 in other states: [New York](https://enrich.chat/naics/523940/new-york/)[California](https://enrich.chat/naics/523940/california/)[Florida](https://enrich.chat/naics/523940/florida/)[Massachusetts](https://enrich.chat/naics/523940/massachusetts/)[Pennsylvania](https://enrich.chat/naics/523940/pennsylvania/)[Texas](https://enrich.chat/naics/523940/texas/)[Ohio](https://enrich.chat/naics/523940/ohio/) Other NAICS codes in Illinois: [NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/illinois/)[NAICS 541512: Computer Systems Design Services](https://enrich.chat/naics/541512/illinois/)[NAICS 722511: Full-Service Restaurants](https://enrich.chat/naics/722511/illinois/)[NAICS 531210: Offices of Real Estate Agents](https://enrich.chat/naics/531210/illinois/)[NAICS 524210: Insurance Agencies and Brokerages](https://enrich.chat/naics/524210/illinois/)[NAICS 541613: Marketing Consulting Services](https://enrich.chat/naics/541613/illinois/)[NAICS 621111: Offices of Physicians](https://enrich.chat/naics/621111/illinois/)[NAICS 488510: Freight Transportation Arrangement](https://enrich.chat/naics/488510/illinois/)[NAICS 238220: Plumbing, Heating, and Air-Conditioning](https://enrich.chat/naics/238220/illinois/)[NAICS 236220: Commercial and Institutional Building](https://enrich.chat/naics/236220/illinois/) ## Frequently asked questions ### Which NAICS 523940 companies are in Illinois? The biggest by headcount range include Morningstar, Wintrust Financial, The Scion Group, Zacks Investment Research and Heitman. The page lists 25 with links to their profiles where we have them. ### What is NAICS 523940? NAICS 523940 is the code for Portfolio Management and Investment Advice, in sector 52: Finance and Insurance. ### Which cities in Illinois have the most? Chicago (56%) and Wheaton (5%) lead among the companies counted. ## Try this prompt Find the people at NAICS 523940 companies in Illinois ```text Use www.enrich.chat to find the finance, operations and technology leaders at companies with NAICS code 523940 in Illinois, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 523940 in New York](https://enrich.chat/naics/523940/new-york/) - [NAICS 523940 in California](https://enrich.chat/naics/523940/california/) - [NAICS 523940 in Florida](https://enrich.chat/naics/523940/florida/) - [NAICS 523940 in Massachusetts](https://enrich.chat/naics/523940/massachusetts/) - [NAICS 541511 in Illinois](https://enrich.chat/naics/541511/illinois/) - [NAICS 541512 in Illinois](https://enrich.chat/naics/541512/illinois/) - [NAICS 722511 in Illinois](https://enrich.chat/naics/722511/illinois/) - [NAICS 531210 in Illinois](https://enrich.chat/naics/531210/illinois/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)