Wealth manager, independent · Santa Monica, CA
Main Street Advisors
MSA Advisors, LLC · SEC-registered investment adviser · CRD 305170 · SEC 801-117239
At a glance
Main Street Advisors is an SEC-registered investment adviser based in Santa Monica, California, with $9.6 billion in regulatory assets under management as of its Form ADV filed March 27, 2026. Its largest client group by assets is high-net-worth individuals, and it reports 68 individual clients. By Form ADV it is a wealth manager, ranked 176th of 8,915 wealth managers and 1,404th of 17,210 SEC-registered advisers by assets.
Main office 310-778-2200mainstreetadvisors.comLinkedInAs filed on Form ADV
- Regulatory AUM
- $9.6B
- Rank among wealth managers
- #176 of 8,915
- Rank among all SEC RIAs
- #1,404 of 17,210
- Rank in California
- #146 of 1,873
- Individual clients
- 68
- High-net-worth clients
- 68
- Accounts
- 125
- Discretionary
- 73% of AUM
- Employees
- 34
- Advisory staff
- 17
- Offices
- 1
Owners and executives on its Form ADV
- Paul D. WachterChief Executive Officer
- Todd J. RosenGeneral Counsel
- Christopher M. FilloVice Chairman
- James B. PottsChief Financial Officer
- Jeremy B. SzuchChief Compliance Officer
- Christine D. BanianPresident
Custody and brokerage
Custodian
Main Street Advisors’s Form ADV lists no custodian for separately managed accounts. Firms report one only when they manage $10 million or more in those accounts.
Broker-dealer
Hybrid RIA
Main Street Advisors is a hybrid RIA: 6 of its employees are also registered representatives of a broker-dealer. It names an affiliated broker-dealer: MSA Securities, LLC.
- MSA Securities, LLC ↗CRD 150557
An introducing broker-dealer: its trades clear through another firm, which holds the brokerage accounts. Its annual audited report filed with the SEC, March 2026
Its Form ADV brochure (filed March 2026) names MSA Securities as the broker-dealer its advisers are registered with.
Other Financial Industry Activities and Affiliations MSA has management persons who are registered representatives of MSA Securities, LLC, an affiliated registered broker-dealer.
Who it serves
| Client type | Clients | Regulatory AUM | Share |
|---|---|---|---|
| High-net-worth individuals | 68 | $7.1B | 74% |
| Pooled investment vehicles | 6 | $1.8B | 18% |
| State or municipal government entities | – | $691M | 7% |
| Charitable organizations | – | $48M | <1% |
Private funds
Main Street Advisors reports 6 private funds with $1.8B in gross assets: hedge funds, private equity funds, other private funds (Form ADV Item 7.B).
Disciplinary disclosures
Main Street Advisors reports no disciplinary disclosures in Item 11 of Form ADV. Read the details on the SEC’s adviser search ↗
Services
- Portfolio management for individuals and small businesses
- Portfolio management for pooled investment vehicles
- Portfolio management for businesses and institutions
- Selecting other advisers
How it’s paid
- A percentage of assets under management
- Performance-based fees
Form ADV and brochures on the SEC’s adviser search ↗mainstreetadvisors.com ↗
AtlasMembers
The full record on Main Street Advisors
Ten years of SEC filings, its owners and contacts, and how it stacks up against its peers. Atlas members see all of it.
- Assets, accounts, clients and staff, 6 years of filings
- Locked
- Growth over one, three and five years
- Locked
- Rank against 416 peers of its type and size
- Locked
- Owners and executives, with titles and stakes
- 6 namedLocked
- Main office, fax and compliance officer
- Locked
- Filing changes this year, with alerts
- 2Locked
Free while Atlas launches: create a free account and confirm your email. Every figure comes from SEC filings.
Background
Questions
How much does Main Street Advisors manage?
Main Street Advisors reports $9.6 billion in regulatory assets under management across 125 accounts, 73% of it on a discretionary basis, on its Form ADV filed March 27, 2026.
What kind of firm is Main Street Advisors?
Main Street Advisors is a wealth manager by its Form ADV answers. At least half of its regulatory assets are managed for individuals and high-net-worth individuals.
Who are Main Street Advisors’s clients?
By assets, its largest client types are high-net-worth individuals ($7.1 billion, 68 clients); pooled investment vehicles ($1.8 billion, 6 clients); state or municipal government entities ($691 million).
Does Main Street Advisors manage private funds?
Yes. It reports 6 private funds with $1.8 billion in gross assets, including hedge funds, private equity funds, other private funds.
Does Main Street Advisors have any disciplinary history?
Main Street Advisors reports no disciplinary disclosures in Item 11 of its Form ADV. Check the SEC’s adviser search for the latest record.
Where these numbers come from
Every figure is Main Street Advisors’s own answer on its latest Form ADV, from the SEC’s registered-adviser list as of October 1, 2026: regulatory assets and accounts (Item 5.F), clients by type (5.D), employees (5.A and 5.B), compensation (5.E) and services (5.G). Custodians come from Schedule D 5.K(3) of its latest filing (2026-03-27), which lists those holding 10% or more of separately managed account assets and the amount at each. “Hybrid” means some employees are also registered representatives of a broker-dealer (Item 5.B(2)); affiliated broker-dealers are the related persons it lists in Item 7.A and Schedule D. Firm type comes from its own answers: broker-dealer firms are registered broker-dealers themselves (Item 6.A); private fund advisers manage mostly private funds (Item 7.B, 5.D); wealth managers manage at least half their assets for individuals (5.D). Ranks compare it by regulatory assets with every SEC-registered adviser and with firms of its type. Figures are as of the firm’s last annual update, so they can lag recent deals and market moves. Regulatory AUM counts assets the firm continuously supervises and can differ from what a firm markets.
Not an endorsement or a recommendation. Before hiring any adviser, read its Form ADV Part 2A brochure and check its record on the SEC’s adviser search. How to check a financial advisor →