Abacus Wealth Partners provides financial planning, portfolio management for individuals and small businesses, portfolio management for pooled vehicles, portfolio management for institutions, pension consulting, selecting other managers, educational seminars, business succession planning, education planning, estate planning, insurance, philanthropic planning, and tax planning. Financial planning was provided to 1,200 clients last fiscal year. The firm advises 1 private fund.
Abacus Wealth Partners reports 1,574 clients. They include 800 individual clients, 747 high-net-worth individuals and 22 charitable organizations. Of its assets, 99.8% ($3.57B across 6,021 accounts) are managed with discretion; $8.3M across 9 accounts are not. Of its clients, 1% are outside the U.S. It advised 9 clients without assets under management last fiscal year.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 51% | 10% |
| High-net-worth individuals | 47% | 79% |
| Charitable organizations | 1% | 11% |
| Corporations and other businesses | <1% | <1% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 800 | $346M | 9.7% | $433K |
| High-net-worth individuals | 747 | $2.83B | 79.1% | $3.79M |
| Charitable organizations | 22 | $391M | 10.9% | $17.8M |
| Corporations and other businesses | 5 | $12.5M | 0.3% | $2.49M |
| Total | 1,574 | $3.58B | 100% | $2.27M |
- Clients
- 800
- Regulatory AUM
- $346M
- AUM share
- 9.7%
- Avg. per client
- $433K
- Clients
- 747
- Regulatory AUM
- $2.83B
- AUM share
- 79.1%
- Avg. per client
- $3.79M
- Clients
- 22
- Regulatory AUM
- $391M
- AUM share
- 10.9%
- Avg. per client
- $17.8M
- Clients
- 5
- Regulatory AUM
- $12.5M
- AUM share
- 0.3%
- Avg. per client
- $2.49M
Total
- Clients
- 1,574
- Regulatory AUM
- $3.58B
- AUM share
- 100%
- Avg. per client
- $2.27M
- Clients outside the U.S.
- 1%
- Clients advised without assets under management last fiscal year
- 9
- Private funds advised
- 1
- Financial planning clients last fiscal year
- 1200
Abacus Wealth Partners charges 0.25%–1.00% a year for its Investment Management Fee. The fee is billed in advance. The brochure also prices 2 other services, listed under fee details.
Fee details and sources
Other fees
- Financial planning and consulting
- Financial planning is included in the management fee above $10,000 a year; for planning-only clients or fees under $10,000 a year, a minimum annual amount of $5,000 applies.
- Private illiquid investment advice
- Advice on private, illiquid investments is charged at up to 2%, excepted from the fee grid.
Sherman Financial, Inc. owns 25% to 50% of Abacus Wealth Partners and is in turn owned by Spencer Sherman (25–50%). It has 65 employees, 37 of them in advisory roles.
Leadership
- Emily BenedettoBoard Member / Partner
- Gabriel BrennerBoard Member / Partner
- Neela HummelCo-CEO
- Brenton KesselCo-Founder
- Susan OlsonBoard Member / Partner
- Jorge PaganinCFO/CCO/COO Partner
- Barrett PorterFinancial Advisor and Partner
- Lindsey RafkindCo-CIO/Partner
- Matthew RiveraCo-CIO/Partner
- Spencer ShermanCo-Founder
- Barbara WolfBoard Member / Partner
- Walter YuBoard Member
Investment adviser representatives
50 representatives listed in the SEC register as of 9 October 2026.
- Kelly Jayne Acheson
- Kathleen Barron-Alicante
- Emily Rose Benedetto
- Elizabeth Metcalf Boehne
- Lauren Taylor Boyes
- Gabriel Stephen Brenner
- Rose Ellen Brink-Capriola
- Marisa Anh Hoan Browne
- Brenda Sheree Chatman
- Lalaine Collantes
- Chrysantha Cosby
- Tiesha Cullins
- Jana Elizabeth Davis
- Cody James Elbert
- Hannah Entenman
- Elise Faur
- Christopher Habib
- Cosmo Charles Hahn
- Brittany Rose Huie
- Neela Bushnell Hummel
- Jo-Anne Marie Jessee
- Kerry Grace Keihn
- Brenton Warwick Kessel
- Hallie Elizabeth Kraus
- Lara Gaston Lamb
- Ruby Delilah Lambrecht
- Deegan Christopher Lee
- Wilson S Li
- Kasey Michael McManis
- Alison Elizabeth Motroni
- Susan Olson
- Danielle Onesto
- Jason Pollens
- Barrett Sean Porter
- Lindsey Shea Woodward Rafkind
- David Rey
- Matthew John Rivera
- Spencer David Sherman
- Daniel Raymond Smith
- Katherine Marie Sumner
- Christopher Louis Vallejo Jr.
- Daria S Victorov
- Elizabeth Ariel Ward
- Katelynn Wiley
- Kyle A Williams
- Aaron Winer
- Barbara Jacobs Wolf
- Michael Anthony Wong
- Walter Yu
- Alexander N Zanier
Staff
- 65 employees
- 37 in advisory functions
- 37 state-registered reps
- 2 soliciting firms
- Owns 25% to 50% of Abacus Wealth Partners, LLC
Sherman Financial, Inc.
Control person · since January 2004
- Owns 25% to 50% of Sherman Financial, Inc.
Spencer Sherman
Control person · since December 1993
- Owns 25% to 50% of Abacus Wealth Partners, LLC
Abacus Wealth Management, Inc.
Control person · since January 2004
- Owns 25% to 50% of Abacus Wealth Management, Inc.
Brenton Kessel
Control person · since January 1998
Abacus Wealth Partners’ regulatory assets went from $3.75B (March 2021) to $3.58B (September 2026); clients fell from 1,665 to 1,574 and employees were 65 in both filings. Between 2004 and 2025, 5 advisory firms joined it. The most recent was Milestone Financial Advisors (Aaron Winer), in October 2025.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | Employees | Offices |
|---|---|---|---|---|
| September 2026 | $3.58B | 1,574 | 65 | 32 |
| May 2025 | $3.27B | 1,544 | 67 | 28 |
| July 2024 | $3.14B | 1,570 | 71 | 14 |
| March 2023 | $2.83B | 1,529 | 71 | 16 |
| July 2022 | $3.43B | 1,535 | 65 | 13 |
| March 2021 | $3.75B | 1,665 | 64 | 8 |
Firms that joined
20251 joined
- Milestone Financial Advisors (Aaron Winer)No filed AUM
20231 joined
- Halcyon Financial PlanningNo filed AUM
20211 joined
- Robasciotti & PhilipsonNo filed AUM
20191 joined
- Workable WealthNo filed AUM
20041 joined
- Sherman Financial (Spencer Sherman)No filed AUM
Firms whose SEC withdrawal reports a sale to this firm, and deals reported in the press. Teams that moved without selling a registered firm may not appear.
Besides its headquarters, Abacus Wealth Partners has 31 offices (28 private residences, listed without an address), with 4 listed addresses in California.
California · 4 listed addresses
- 429 Santa Monica BLVD., Suite 500, Santa MonicaHQ
- 973 Laurel Street, San Carlos
- 101 S Main Street, Sebastopol
- 429 Santa Monica BLVD., Santa Monica
Other business names
Abacus Wealth Partners has reported 1 other business name to the SEC.
- Abacus Wealth Partners
Contact and registration details
- Legal name
- Abacus Wealth Partners, LLC
- Headquarters
- 429 Santa Monica BLVD., Suite 500, Santa Monica, CA 90401
- Website
- abacuswealth.com
- Phone
- 888-422-2287
- @abacus-wealth-partners
- SEC file
- 801-62557
- Founded
- 2004
- Structure
- Pennsylvania LLC
- Fiscal year end
- December
Abacus Wealth Partners uses Charles Schwab ($3.35B) as custodian for its separately managed accounts. Abacus Wealth Partners has custody of $1.75B in client assets for 910 clients.
- Charles SchwabCharles Schwab & Co., Inc. · San Francisco, CA · $3.35B100%
At year end, Abacus Wealth Partners’ separately managed accounts were mostly in funds (60%) and stocks (33%). Its reported 13F holdings for the quarter ended 30 June 2026 total $952M across 321 positions; the largest are Dfa Dimensional Glbl Sustainability Fx Inc. ETF (15.8%), Vert Global Sustainable Real Estate ETF (13.2%) and Nuveen Esg Small-cap ETF (8.5%).
What the accounts hold
- Stocks33%
- Funds60%
- Bonds3%
- U.S. government and agency bonds1%
- State and local bonds1%
- Investment grade corporate bonds1%
- Cash2%
- Other2%
- Variable/fixed annuity2%
Reported 13F holdings
- $952M
- Reported 13F value
- 321
- Positions
- 70.9%
- In the 10 largest
- −13.1%
- Value vs. prior quarter
- Dfa Dimensional Glbl Sustainability Fx Inc. ETFETF15.8%
- Vert Global Sustainable Real Estate ETFETF13.2%
- Nuveen Esg Small-cap ETFETF8.5%
- Dimensional U S Targeted Value ETFETF7.5%
- Adasina Social Justice All Cap Global ETFETF7.1%
- Dimensional US Sustainability Core 1 ETFETF6.4%
- Nuveen Esg Mid-cap Value ETFETF5.0%
- Dimensional Intl Sustainability Core 1 ETFETF2.9%
- Nuveen Esg Emerging Markets Equity ETFETF2.8%
- Apple Inc.1.8%
Together, the ten largest are 70.9% of reported value.
How many clients does Abacus Wealth Partners have?
Abacus Wealth Partners has 1,574 clients and manages $3.58 billion for them, as of September 2026. They include 800 individual clients, 747 high-net-worth individuals and 22 charitable organizations.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 30 September 2026
What services does Abacus Wealth Partners offer?
Abacus Wealth Partners provides financial planning, portfolio management for individuals and small businesses, portfolio management for pooled vehicles, portfolio management for institutions, pension consulting, selecting other managers, educational seminars, business succession planning, education planning, estate planning, insurance, philanthropic planning, and tax planning.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file; Part 2A brochure, Item 4
How much does Abacus Wealth Partners charge?
Abacus Wealth Partners charges 0.25%–1.00% a year for its Investment Management Fee. The fee is billed in advance.
Source: ABACUS WEALTH PARTNERS, LLC FIRM BROCHURE, filed 30 September 2026
Which custodians does Abacus Wealth Partners use?
Abacus Wealth Partners’ separately managed account assets are held at Charles Schwab & Co., Inc. (San Francisco, CA), with $3.35B. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 30 September 2026
How many financial advisors does Abacus Wealth Partners have?
Abacus Wealth Partners has 37 investment adviser representatives registered with state securities authorities, out of 65 employees, and 37 perform investment advisory functions. None are registered representatives of a broker-dealer or licensed insurance agents.
Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file
What does Abacus Wealth Partners invest in?
At the end of its last fiscal year, Abacus Wealth Partners’ separately managed accounts held 60% registered funds (mutual funds, ETFs, BDCs), 33% exchange-traded equities, 2% cash and equivalents, 2% other, 1% U.S. government and agency bonds, 1% state and local bonds and 1% investment grade corporate bonds. The 2% other category is described as: Variable/Fixed Annuity. It advises 1 private fund.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Abacus Wealth Partners?
Abacus Wealth Partners is owned through holding companies by Spencer Sherman and Brenton Kessel. Its direct owners are Sherman Financial, Inc. and Abacus Wealth Management, Inc., each holding 50% or less.
Source: Form ADV Part 1A, Schedules A and B, filed 30 September 2026
How does Abacus Wealth Partners get paid?
Abacus Wealth Partners is paid through a percentage of assets under management, fixed fees and performance-based fees. Its Form ADV lists no commissions among how it is paid.
Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file
Is Abacus Wealth Partners registered with the SEC?
Yes, Abacus Wealth Partners has been registered with the SEC as an investment adviser since 2 January 2004. Its CRD number is 128590 and its SEC file number is 801-62557.
Source: Form ADV Part 1A, Item 1, filed 30 September 2026; IAPD firm record
How do I contact Abacus Wealth Partners?
Abacus Wealth Partners’ main office is at 429 Santa Monica BLVD., Suite 500, Santa Monica, CA 90401. Its phone number is 888-422-2287. Its website is abacuswealth.com.