Data / Investment advisers / Illinois / Oak Brook
Investment advisers in Oak Brook, IL: 13 firms, $5.5 billion in AUM
13 investment advisers have their main office in Oak Brook, Illinois: 13 SEC registered and 0 exempt reporting. The registered advisers report $5.5 billion in regulatory assets under management in the SEC's Form ADV file of November 2, 2026, and the largest is Chicago Oakbrook Financial Group with $1.2 billion.
SpecStream is the live web data engine for teams and agents. It reads the SEC's Form ADV files every month, and this page is that reading, keyed on the CRD number. Ask for the advisers you track by state, city, size, client type or private funds, and new registrations and filings arrive in your sheet, CRM, Slack or agent as the SEC publishes them.
- 13Advisers
- 13SEC registered
- $5.5 billionTotal AUM
- 11Advisers over $100 million
- 5Manage private funds
- November 2, 2026File date
Largest advisers by AUM
Ranked by regulatory AUM, then by private funds. Each row links to the firm page where it has one, and to its SEC record.
| Adviser | City | AUM | Accounts | Employees | Private funds | Phone | Website | Source |
|---|---|---|---|---|---|---|---|---|
| Chicago Oakbrook Financial Group | Oak Brook | $1.21 billion | 4,345 | 19 | Not listed | (630) 954-5572 | adviserinfo.sec.gov | |
| Huizenga Capital Management, LLC | Oak Brook | $996.7 million | 21 | 13 | 20 | (630) 990-2100 | huizcap.com | adviserinfo.sec.gov |
| Rock Island Capital | Oak Brook | $636.6 million | 13 | 10 | 13 | (630) 413-9136 | adviserinfo.sec.gov | |
| North Branch Capital Management, L.P. | Oak Brook | $467.5 million | 5 | 8 | 5 | (630) 782-1590 | adviserinfo.sec.gov | |
| Inland Advisory Services, LLC | Oak Brook | $443.1 million | 1 | 48 | Not listed | (630) 218-8000 | adviserinfo.sec.gov | |
| Watershed Private Wealth | Oak Brook | $413.7 million | 555 | 3 | Not listed | (630) 478-0195 | watershedprivatewealth.com | adviserinfo.sec.gov |
| Squadron Capital Management LLC | Oak Brook | $385.7 million | 2 | 4 | 1 | (214) 478-3862 | squadroncapitalmgmt.com | adviserinfo.sec.gov |
| Ergawealth Advisors, Inc. | Oak Brook | $341.5 million | 1,077 | 5 | Not listed | (630) 320-2078 | ergawealth.com | adviserinfo.sec.gov |
| Stonebridge Wealth Management LLC | Oak Brook | $283.3 million | 1,016 | 4 | Not listed | (630) 230-1830 | adviserinfo.sec.gov | |
| Kuhn Capital Partners | Oak Brook | $169.9 million | 271 | 5 | 4 | (800) 674-3217 | adviserinfo.sec.gov | |
| Dillow Wealth Management LLC | Oak Brook | $106.3 million | 147 | 2 | Not listed | (224) 330-9662 | adviserinfo.sec.gov | |
| Tall Pines Capital, LLC | Oak Brook | $25 million | 100 | 2 | Not listed | (630) 564-1348 | adviserinfo.sec.gov | |
| Rothschild Financial Partners, LLC | Oak Brook | Not listed | 0 | 2 | Not listed | (630) 448-5711 | adviserinfo.sec.gov |
Advisers in Oak Brook that manage private funds
5 advisers report private funds. The 30 with the most funds.
| Adviser | City | State | Private funds | Hedge | Private equity | Venture capital | Real estate | Fund gross assets | AUM | Source |
|---|---|---|---|---|---|---|---|---|---|---|
| Huizenga Capital Management, LLC | Oak Brook | IL | 20 | 2 | 15 | Not listed | 3 | $996.7 million | $996.7 million | adviserinfo.sec.gov |
| Rock Island Capital | Oak Brook | IL | 13 | Not listed | 13 | Not listed | Not listed | $865.5 million | $636.6 million | adviserinfo.sec.gov |
| North Branch Capital Management, L.P. | Oak Brook | IL | 5 | Not listed | 5 | Not listed | Not listed | $467.4 million | $467.5 million | adviserinfo.sec.gov |
| Kuhn Capital Partners | Oak Brook | IL | 4 | 2 | Not listed | Not listed | Not listed | $26.2 million | $169.9 million | adviserinfo.sec.gov |
| Squadron Capital Management LLC | Oak Brook | IL | 1 | 1 | Not listed | Not listed | Not listed | $385.7 million | $385.7 million | adviserinfo.sec.gov |
Newest SEC registrations in Oak Brook
1 adviser with an SEC status effective in the 90 days to November 2, 2026.
| Adviser | City | State | SEC status effective | AUM | Website | Source |
|---|---|---|---|---|---|---|
| Squadron Capital Management LLC | Oak Brook | IL | August 5, 2026 | $385.7 million | squadroncapitalmgmt.com | adviserinfo.sec.gov |
Also on SpecStream
Updated November 7, 2026. Read from the SEC's Form ADV data files for investment advisers. Public data published by the US Securities and Exchange Commission (US government work). Advisers report these values themselves in Form ADV, and neither the SEC nor the states approve or guarantee them. AUM is regulatory assets under management as the adviser reported it in Form ADV item 5.F, which can differ from the AUM a firm quotes elsewhere. Exempt reporting advisers do not report AUM. Office address, phone and website are the adviser's main office as filed; a firm that files its main office as a private residence shows no street address or phone. An Item 11 disclosure is a reported event, not a finding about the firm today. Details for each firm are on the SEC's Investment Adviser Public Disclosure site. This page uses SEC data and is not endorsed or certified by the SEC. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.