Cox Capital Management provides financial planning, portfolio management for individuals and small businesses, portfolio management for institutions, business succession planning, education planning, estate planning, insurance, philanthropic planning, and tax planning.
Cox Capital Management reports 216 clients. They include 108 individual clients, 93 high-net-worth individuals and 10 charitable organizations. Of its assets, 100.0% ($361M across 579 accounts) are managed with discretion. Of its clients, 1% are outside the U.S. It advised 1 client without assets under management last fiscal year.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 50% | 12% |
| High-net-worth individuals | 43% | 81% |
| Charitable organizations | 5% | 6% |
| Corporations and other businesses | 2% | <1% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 108 | $44.1M | 12.2% | $409K |
| High-net-worth individuals | 93 | $291M | 80.7% | $3.13M |
| Charitable organizations | 10 | $22.3M | 6.2% | $2.23M |
| Corporations and other businesses | 5 | $3.18M | 0.9% | $637K |
| Total | 216 | $361M | 100% | $1.67M |
- Clients
- 108
- Regulatory AUM
- $44.1M
- AUM share
- 12.2%
- Avg. per client
- $409K
- Clients
- 93
- Regulatory AUM
- $291M
- AUM share
- 80.7%
- Avg. per client
- $3.13M
- Clients
- 10
- Regulatory AUM
- $22.3M
- AUM share
- 6.2%
- Avg. per client
- $2.23M
- Clients
- 5
- Regulatory AUM
- $3.18M
- AUM share
- 0.9%
- Avg. per client
- $637K
Total
- Clients
- 216
- Regulatory AUM
- $361M
- AUM share
- 100%
- Avg. per client
- $1.67M
- Clients outside the U.S.
- 1%
- Clients advised without assets under management last fiscal year
- 1
- Private funds advised
- 0
- Financial planning clients last fiscal year
- 0
Cox Capital Management charges 0.20%–1.00% for its Investment Management Fees. The brochure does not state whether the rate is annual. The fee is billed in arrears and is negotiable. The brochure also prices one other service, listed under fee details.
Fee details and sources
Other fees
- Consulting
- Consulting is billed hourly, typically $150 to $350 per hour, payable as the services are performed, with a $150 minimum charge per engagement.
William Cox owns 50% to 75% of Cox Capital Management. The leadership team of Cox Capital Management includes President William Cox. It has 4 employees.
Leadership
- William CoxPresident/Member/CCO
- Ethan BrownPartner
Investment adviser representatives
4 representatives listed in the SEC register as of 9 October 2026.
- Jillian Brooks
- Ethan Thomas Brown
- William John Cox
- Harrison Oakes
Staff
- 4 employees
- 4 in advisory functions
- 4 state-registered reps
- 1 soliciting firm
- Owns 50% to 75% of Cox Capital Management LLC
William Cox
Control person · since January 2002
- Owns 50% to 75% of Cox Capital Management LLC
Ethan Brown
Control person · since January 2020
Cox Capital Management’s regulatory assets grew 1.5× from $235M (May 2021) to $361M (September 2026); clients rose from 148 to 216 and employees fell from 5 to 4.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | Employees | Offices |
|---|---|---|---|---|
| September 2026 | $361M | 216 | 4 | 1 |
| March 2025 | $329M | 215 | 5 | 1 |
| April 2024 | $304M | 199 | 4 | 1 |
| June 2023 | $273M | 189 | 5 | 1 |
| June 2022 | $286M | 164 | 3 | 1 |
| May 2021 | $235M | 148 | 5 | 1 |
Besides its headquarters, Cox Capital Management has 0 offices, with 1 listed address in Massachusetts.
Massachusetts · 1 listed address
- 10 New England Business Center Drive, Suite #102, AndoverHQ
Contact and registration details
- Legal name
- Cox Capital Management LLC
- Headquarters
- 10 New England Business Center Drive, Suite #102, Andover, MA 01810
- Website
- coxcapitalmanagement.com
- Phone
- 978-475-3325
- SEC file
- 801-78915
- Founded
- 1997
- Structure
- Massachusetts LLC
- Fiscal year end
- December
Cox Capital Management uses Fidelity ($361M) as custodian for its separately managed accounts. Cox Capital Management has custody of $55.1M in client assets for 59 clients.
- FidelityFidelity Investment · Boston, MA · $361M100%
At year end, Cox Capital Management’s separately managed accounts were largely in stocks (42%) and funds (32%).
What the accounts hold
- Stocks42%
- Funds32%
- Registered funds30%
- Pooled vehicles2%
- Bonds14%
- U.S. government and agency bonds9%
- State and local bonds2%
- Investment grade corporate bonds2%
- High-yield corporate bonds1%
- Cash9%
- Other4%
- Reits, private placements, va's, cd's4%
How many clients does Cox Capital Management have?
Cox Capital Management has 216 clients and manages $361 million for them, as of September 2026. They include 108 individual clients, 93 high-net-worth individuals and 10 charitable organizations.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 24 September 2026
What services does Cox Capital Management offer?
Cox Capital Management provides financial planning, portfolio management for individuals and small businesses, portfolio management for institutions, 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 Cox Capital Management charge?
Cox Capital Management charges 0.20%–1.00% for its Investment Management Fees. The brochure does not state whether the rate is annual. The fee is billed in arrears and is negotiable.
Which custodians does Cox Capital Management use?
Cox Capital Management’s separately managed account assets are held at Fidelity Investment (Boston, MA), with $361M. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 24 September 2026
How many financial advisors does Cox Capital Management have?
Cox Capital Management has 4 investment adviser representatives registered with state securities authorities, out of 4 employees, and 4 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 Cox Capital Management invest in?
At the end of its last fiscal year, Cox Capital Management’s separately managed accounts held 42% exchange-traded equities, 30% registered funds (mutual funds, ETFs, BDCs), 9% U.S. government and agency bonds, 9% cash and equivalents, 4% other, 2% state and local bonds, 2% investment grade corporate bonds, 2% pooled vehicles (private funds and similar) and 1% high-yield corporate bonds. The 4% other category is described as: Reits, Private Placements, Va'S, CD'S.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Cox Capital Management?
Cox Capital Management’s direct owners are William Cox (50% to 75%) and Ethan Brown (50% to 75%).
Source: Form ADV Part 1A, Schedules A and B, filed 24 September 2026
How does Cox Capital Management get paid?
Cox Capital Management is paid through a percentage of assets under management and hourly charges. Its Form ADV lists no commissions or performance-based fees among how it is paid.
Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file
How do I contact Cox Capital Management?
Cox Capital Management’s main office is at 10 New England Business Center Drive, Suite #102, Andover, MA 01810. Its phone number is 978-475-3325. Its website is coxcapitalmanagement.com.