Fee-only adviser · St. Louis, MO
Sigma Advisors, LLC
Sigma Advisors, LLC is a fee-only investment adviser registered with the securities regulator of Missouri, with a mailing address in St. Louis, Missouri (its office is a private residence, so the street address is not published). On its latest Form ADV, filed March 31, 2025, it reports $65M in regulatory assets under management, 12 individual clients and 1 employee who gives investment advice. It reports no commission compensation, is not registered as a broker-dealer and does not act as an insurance agent.
Key facts from Form ADV
| Registration | State-registered: Missouri |
|---|---|
| Firm CRD number | 304517 |
| Office | St. Louis, MO (mailing address; office not published) |
| Phone | (314) 984-9600 |
| Website | www.sigmallc.com |
| Regulatory assets under management | $65M |
| Individual clients | 1 non-high-net-worth, 11 high-net-worth |
| Financial planning clients | 11-25 |
| How it charges | Fixed fee |
| Services | Financial planning, Portfolio management |
| Employees | 1 |
| Disciplinary disclosures | None reported |
| Latest Form ADV filing | March 31, 2025 |
Source: the firm’s Form ADV Part 1A as published by the SEC’s Investment Adviser Public Disclosure database, data as of November 6, 2026. Figures are self-reported by the firm.
What this means for you
- It offers hourly or fixed-fee arrangements, so you may be able to pay for a plan without handing over your investments.
- Most of its individual clients are high-net-worth, which on Form ADV means they meet the SEC’s qualified-client or qualified-purchaser test: broadly, more than $1 million managed by the adviser or a net worth above $2 million, with the thresholds indexed for inflation.
- It provides financial planning services, not only portfolio management.
- It reports no disciplinary history on Form ADV.
Before you hire any adviser
Read the firm’s Form ADV Part 2 brochure on its SEC record: it sets out fees, minimums, conflicts of interest and who will manage your money. Ask whether the firm acts as a fiduciary for all of your accounts, how it is paid in total, and who holds your assets. Our guide to choosing a financial adviser lists the questions to ask.
Other fee-only advisers in St. Louis
- Moneta Group Investment Advisors, LLC $50.5B
- Visionary Wealth Advisors, LLC $3.5B
- Plancorp, LLC $10.6B
- RBF Wealth Advisors $716M
- Tbg-Bedford Group LLC $758M
- Compass Wealth $112M
See all 57 fee-only advisers in St. Louis →
Nearby
- Ladue 1 firm
- Clayton 9 firms
- Webster Groves 1 firm
- Kirkwood 1 firm
- Creve Coeur 2 firms
- Sunset Hills 1 firm
- Chesterfield 10 firms
- Ellisville 2 firms
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