AdvisorCensus / Financial advisors / California / Los Angeles / Main Street Advisors
Main Street Advisors is an SEC-registered investment advisory firm in Santa Monica, CA, registered since 2019, reporting over $5 billion in regulatory assets under management in its Form ADV filing dated March 27, 2026.
Quick answers
From the filingHow is Main Street Advisors compensated?
On its Form ADV (Item 5.E, October 2026), Main Street Advisors reports these compensation arrangements: a percentage of assets under its management; performance-based fees.
Where is Main Street Advisors located?
Main Street Advisors' principal office is in Santa Monica, CA, according to its Form ADV.
Is Main Street Advisors registered with the SEC or a state?
Main Street Advisors is an SEC-registered investment advisory firm, registered since 2019. Status as filed: Approved. CRD 305170.
How much does Main Street Advisors manage?
Main Street Advisors reports $9,647,018,829 in regulatory assets under management in its Form ADV filing dated March 27, 2026 (73% discretionary).
How have Main Street Advisors' assets and staff changed since 2021?
In the Form ADV data for Main Street Advisors: Regulatory assets under management: $6,082,889,363 in the October 2021 data and $9,647,018,829 in the October 2026 data, up 59%. Total employees: 23 in October 2021 and 34 in October 2026. Assets under management move with markets as well as with clients coming and going.
What types of clients does Main Street Advisors serve?
By number of clients on Form ADV Item 5.D: high net worth individuals (68); pooled investment vehicles (other than investment companies and business development companies) (6).
Does Main Street Advisors report any disciplinary disclosures?
Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/305170
Does Main Street Advisors state an account minimum?
Its Form ADV Part 2A brochure dated March 27, 2026 says: "MSA generally requires clients to place at least $10 million under an advisory relationship; however, MSA maintains discretion to accept less than the minimum threshold."
What changed in Main Street Advisors' recent Form ADV filings?
In the April 2026 filing data: Regulatory assets under management went from $8,739,376,053 to $9,647,018,829 (+10%). Employees performing advisory functions went from 15 to 17.
From the Form ADV filing
Every figure below is as the firm filed it with regulators, as of October 2026.
How the firm is compensated
Item 5.E- A percentage of assets under your management
- Performance-based fees
Item 5.E lists how the firm is compensated for its advice; Items 5.B, 6.A, and 7.A show whether its people or related companies can also earn commissions. Percentage of assets, fixed, hourly, subscription, and performance-based fees come from clients (a performance-based fee depends on investment results); commissions come with a sale or a trade, often from the company behind the product. How fees, commissions, and other arrangements differ
Fees and minimums
Form ADV Part 2AAccount minimum: $10,000,000 (the brochure says it may be waived or negotiated)
The brochure's wording
MSA generally requires clients to place at least $10 million under an advisory relationship; however, MSA maintains discretion to accept less than the minimum threshold.
As stated in the firm's Form ADV Part 2A brochure dated March 27, 2026. Fees can differ by service and may be negotiable; the brochure is the complete statement. Read the brochure on the SEC's IAPD site
Regulatory assets under management
Item 5.F$9,647,018,829 as of October 2026, filing dated March 27, 2026.
A measure of scale, not skill or returns. Discretionary means the firm decides trades; non-discretionary means clients approve each one. What assets under management means
Who the firm serves
Item 5.DA firm with no individual clients is an institutional manager even if it manages billions; the mix tells you whom the practice is built around.
Advisory services
Item 5.G- Portfolio management for individuals and/or small businesses
- Portfolio management for pooled investment vehicles (other than investment companies)
- Portfolio management for businesses (other than small businesses) or institutional clients
- Selection of other advisers (including private fund managers)
Registration and firm details
Items 1, 2, 5- Legal name
- MSA Advisors, LLC
- Registration
- SEC-registered investment adviser. Status as filed: Approved.
- Registered since
- 2019 (7 years)
- Employees
- Total: 34. Performing investment advisory functions: 17.
- Wrap fee program participation
- No.
- States registered or notice-filed
-
2 states or jurisdictions
SEC-registered investment advisers are examined by the SEC. SEC, state, and exempt registration
Disclosures
Item 11None Reports no disclosure items on Form ADV Item 11. View on IAPD.
Item 11 asks about criminal, regulatory, and civil events involving the firm and its advisory personnel. The detail of each yes answer is on the IAPD record. Reading a firm's disclosures
Assets and staff over time
Items 5.A, 5.F| Data period | Assets under management | Employees | Filing dated |
|---|---|---|---|
| October 2026 | $9,647,018,829 | 34 | March 27, 2026 |
| October 2025 | $8,739,376,053 | 28 | April 15, 2025 |
| October 2024 | $8,117,604,543 | 26 | June 28, 2024 |
| October 2023 | $7,946,002,715 | 27 | July 12, 2023 |
| October 2022 | $8,567,909,499 | 25 | April 27, 2022 |
| October 2021 | $6,082,889,363 | 23 | September 8, 2021 |
Regulatory assets under management: $6,082,889,363 in the October 2021 data and $9,647,018,829 in the October 2026 data, up 59%.
Total employees: 23 in October 2021 and 34 in October 2026.
As filed in each year's data for the same month. Assets under management move with markets as well as with clients coming and going; they measure scale, not skill or returns. Most firms update these figures once a year.
Changes in the filing
Last 12 months- April 2026
- Regulatory assets under management went from $8,739,376,053 to $9,647,018,829 (+10%).
- Employees performing advisory functions went from 15 to 17.
Compared month to month from the SEC's monthly adviser data and the state compilation feed. Owners and control persons are summarized, never named.
Websites listed on Form ADV
Item 1.ISource: Form ADV, as of October 2026. Values appear as filed; a value the firm did not report is shown as "Not reported."
Cite this page
AdvisorCensus. Main Street Advisors (CRD 305170): Form ADV filing data as of October 2026. https://advisorcensus.com/firm/main-street-advisors-santa-monica-ca-305170