Wealth manager, independent · Santa Monica, CA
Abacus Wealth Partners
Abacus Wealth Partners, LLC · SEC-registered investment adviser · CRD 128590 · SEC 801-62557
At a glance
Abacus Wealth Partners is an SEC-registered investment adviser based in Santa Monica, California, with $3.6B in regulatory assets under management as of its Form ADV filed September 30, 2026. It reports 1,547 individual clients, 747 of them high-net-worth, holding an average of about $2.1 million each, and 65 employees. That ranks it 306th among the nation’s 5,657 independent wealth management RIAs and 37th of 714 in California. It reports Charles Schwab as the custodian for its clients’ separately managed accounts.
Main office 888-422-2287abacuswealth.comLinkedInAs filed on Form ADV
- Regulatory AUM
- $3.6B
- Rank among independent wealth managers
- #306 of 5,657
- Rank among all SEC RIAs
- #2,563 of 17,210
- Rank in California
- #37 of 714
- Individual clients
- 1,547
- High-net-worth clients
- 747
- Accounts
- 6,030
- Discretionary
- 100% of AUM
- Employees
- 65
- Advisory staff
- 37
- Offices
- 32
Owners and executives on its Form ADV
- Spencer D. ShermanCo-Founder
- Brenton W. KesselCo-Founder
- Barrett S. PorterFinancial Advisor and Partner
- Gabriel S. BrennerBoard Member / Partner
- Neela B. HummelCo-Ceo
- Barbara J. WolfBoard Member / Partner
- Walter YuBoard Member
- Matthew J. RiveraCo-Cio/partner
- Lindsey S. RafkindCo-Cio/partner
- Jorge PaganinCfo/cco/coo Partner
- Susan OlsonBoard Member / Partner
- Emily R. BenedettoBoard Member / Partner
Custody and brokerage
Broker-dealer
No broker-dealer ties
Abacus Wealth Partners reports no employees registered with a broker-dealer and no affiliated broker-dealer.
Who it serves
| Client type | Clients | Regulatory AUM | Share |
|---|---|---|---|
| High-net-worth individuals | 747 | $2.8B | 79% |
| Charitable organizations | 22 | $391M | 11% |
| Individuals | 800 | $346M | 10% |
| Corporations or other businesses | 5 | $12M | <1% |
Private funds
Abacus Wealth Partners reports 1 private funds with $12M in gross assets: private equity funds (Form ADV Item 7.B).
Disciplinary disclosures
Abacus Wealth Partners answers yes to 1 disclosure item in Item 11 of Form ADV (criminal, regulatory or civil matters involving the firm or its advisory affiliates). Read the details on the SEC’s adviser search ↗
Services
- Financial planning
- Portfolio management for individuals and small businesses
- Portfolio management for pooled investment vehicles
- Portfolio management for businesses and institutions
- Pension consulting
- Selecting other advisers
- Educational seminars and workshops
- Other services
How it’s paid
- A percentage of assets under management
- Fixed fees
- Performance-based fees
Form ADV and brochures on the SEC’s adviser search ↗abacuswealth.com ↗
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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, ten years of filings
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- 12 namedLocked
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Similar-size RIAs in California
All of California →| Firm | Regulatory AUM | Clients |
|---|---|---|
| Vernal Point Advisors, LLCSAN Francisco | $3.9B | 18 |
| Kingswood Wealth Advisors, LLCSAN Diego | $3.8B | 11,259 |
| Mozaic, LLCBeverly Hills | $3.6B | 86 |
| Morton WealthCalabasas | $3.5B | 1,215 |
| Frank, Rimerman Advisors LLCPalo Alto | $3.4B | 106 |
| Summitry, LLCFoster City | $3.4B | 1,293 |
Background
Questions
How much does Abacus Wealth Partners manage?
Abacus Wealth Partners reports $3.6B in regulatory assets under management across 6,030 accounts, 100% of it on a discretionary basis, on its Form ADV filed September 30, 2026.
How many clients does Abacus Wealth Partners have?
It reports 1,547 individual clients: 747 high-net-worth individuals and 800 other individuals. Individuals account for about 89% of its regulatory assets.
Where is Abacus Wealth Partners headquartered?
Its main office is in Santa Monica, California. It reports 32 offices in total and 65 employees, 37 of whom perform investment advisory functions.
How does Abacus Wealth Partners charge clients?
On Form ADV it lists these forms of compensation: a percentage of assets under management; fixed fees; performance-based fees. Fees and minimums are set out in its Form ADV Part 2A brochure, available on the SEC’s adviser search.
What custodian does Abacus Wealth Partners use?
It reports Charles Schwab as the custodian for its clients’ separately managed accounts. On Schedule D of its Form ADV filed September 30, 2026, it reports these amounts held: Charles Schwab ($3.3B). Form ADV lists only custodians holding 10% or more of separately managed account assets.
Is Abacus Wealth Partners a hybrid RIA with a broker-dealer?
Abacus Wealth Partners reports no employees registered with a broker-dealer and no affiliated broker-dealer.
Is Abacus Wealth Partners a fiduciary?
As an SEC-registered investment adviser, Abacus Wealth Partners owes its advisory clients a fiduciary duty under the Investment Advisers Act of 1940, which includes duties of care and loyalty. It reports no employees who are registered representatives of a broker-dealer.
Where these numbers come from
Every figure is Abacus Wealth Partners’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 (2026-09-30), 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). Its national rank compares it with every US-based independent wealth management RIA, the same field as The Largest RIAs. 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 →