Mainstreet Advisors

Flat / fixed fees in Chicago, IL

SEC registeredNo commissions reported

Call (312) 223-0270 Send a message Map ↗

Public-record details

Address: 120 N. Lasalle Street, Suite 3300, Chicago, IL 60602
Phone: (312) 223-0270
Listed under: Flat / fixed fees, % of assets managed
Legal name: Mainstreet Investment Advisors LLC
CRD number: 146615
Registration: SEC registered since 2008-03-12
Compensation (Form ADV 5.E): Percentage of assets under management; Fixed fees
Commissions: None reported (Form ADV Item 5.E)
Services (Form ADV 5.G): Portfolio management for individuals/small businesses
Regulatory assets under management: $5.9 billion
Accounts managed: 5,636
Clients reported (Form ADV 5.D): 58
Individual / high-net-worth clients: 0 / 2
Employees: 26
Other business activities (Form ADV 6.A): None reported
Disclosures reported on Form ADV: None reported
Latest Form ADV filing: 2026-03-27

SEC registered investment adviser, CRD 146615, per the SEC IAPD compilation report of 2026-09-29. Source: SEC Investment Adviser Public Disclosure (IAPD) (record). Data as of 2026-09-30.

Read the official record

SEC IAPD summary for CRD 146615 — registration, Form ADV, the Part 2 brochure (fees, conflicts, minimums).
FINRA BrokerCheck — look up the individual advisers at this firm.
Firm website (as listed on Form ADV)

Figures are what the firm reported on Form ADV Part 1A. “No commissions reported” means the firm did not check commissions as a form of compensation in Item 5.E; check Item 6.A activities and the Part 2 brochure for other conflicts. We do not rate or rank advisers.

All figures are self-reported by the firm on Form ADV Part 1A. The firm's Part 2A brochure (linked from IAPD) explains its fees, minimums and conflicts of interest in plain language — read it before you sign.

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