Mainstreet RIA LLC
● SEC registered since 2021CRD 309150SEC# 801-121454O'Fallon, MO
Reg. AUM
$446.4M
Employees
3
Accounts
206
Location
O'Fallon, MO
Mainstreet RIA LLC assets under management
Mainstreet RIA LLC operates as an SEC-registered investment adviser based in O'Fallon, MO. The firm has been registered since 2021. It reports $446.4 million in regulatory assets under management and employs 3 people.
Mainstreet RIA LLC owners & executives
3 reported| Name | Title | Ownership | Since |
|---|---|---|---|
| Nicholas S Oldham Control | Managing Partner/Chief Compliance Officer/Investment Advisor Representative | 25-50% | 2021 |
| Richard Lee Counts Control | Managing Partner/Investment Advisor Representative | 25-50% | 2020 |
| Robert Steven Oldham Control | Managing Partner/Investment Advisor Represetative | 25-50% | 2019 |
Frequently asked questions
How much does Mainstreet RIA LLC manage?
Mainstreet RIA LLC reports $446.4 million in regulatory assets under management on its Form ADV.
How many employees does Mainstreet RIA LLC have?
Mainstreet RIA LLC reports 3 employees.
Where is Mainstreet RIA LLC located?
Mainstreet RIA LLC is based in O'Fallon, MO and has been SEC-registered since 2021.
Does Mainstreet RIA LLC disclose fund performance?
Mainstreet RIA LLC is not required to publicly disclose fund returns. Form ADV filings include assets, ownership, and service providers, shown above.
Contact & registration
| Address | 6700 Keaton Corporate Parkway, Suite 102, O'Fallon, MO 63368 |
| Phone | (888) 801-0325 |
| Office hours | 8:30a.m. - 5:00p.m. |
| SEC region | Chicago Regional Office (CHRO) |
| Discloses disciplinary history | No |
Regulatory AUM
$446.4M▲ 14%
Jan '25Form ADV, monthlyJun '26
How this firm compares
Regulatory AUMTop 51%
Larger than 49% of 16,271 advisers
EmployeesTop 77%
More than 23% of 16,825 advisers
Assets under management
$446.4Mregulatory AUM
Discretionary $446.4M