Windrock Wealth Management provides portfolio management for individuals and small businesses, selecting other managers, publishing newsletters, family office services, and retirement plan services. The firm advises 1 private fund.
Windrock Wealth Management reports 83 clients. They include 51 high-net-worth individuals and 32 individual clients. Of its assets, 100.0% ($363M across 583 accounts) are managed with discretion.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 39% | 6% |
| High-net-worth individuals | 61% | 94% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 32 | $20.8M | 5.7% | $650K |
| High-net-worth individuals | 51 | $342M | 94.3% | $6.71M |
| Total | 83 | $363M | 100% | $4.38M |
- Clients
- 32
- Regulatory AUM
- $20.8M
- AUM share
- 5.7%
- Avg. per client
- $650K
- Clients
- 51
- Regulatory AUM
- $342M
- AUM share
- 94.3%
- Avg. per client
- $6.71M
Total
- Clients
- 83
- Regulatory AUM
- $363M
- AUM share
- 100%
- Avg. per client
- $4.38M
- Clients outside the U.S.
- 0%
- Clients advised without assets under management last fiscal year
- 0
- Private funds advised
- 1
Windrock Wealth Management charges 0.25%–1.50% a year for its Wealth Management Services. Each asset band is charged at its own rate. The fee is billed in advance, is negotiable and has a $7,500 annual minimum. The brochure also prices 2 other services, listed under fee details.
| Asset band | Annual rate |
|---|---|
| $0–$500K | 1.50% |
| $500K–$3M | 1.25% |
| $3M–$8M | 0.90% |
| $8M–$18M | 0.70% |
| $18M and above | 0.25% |
Fee details and sources
Other fees
- Financial Planning Projects
- Financial planning projects are charged at an hourly fee of $500, for example $1,500 and up for cash flow and budget analysis or $5,000 to $10,000 for a basic financial plan.
- Retirement Plan Services
- Retirement plan services for plan sponsors are charged on plan assets on the same stepped schedule, from 1.50% on the first $500,000 down to 0.25% above $10 million, billed quarterly in advance.
Declaration of Trust of Brett K. Rentmeester Dated August 14, 2008 owns 75% or more of Windrock Wealth Management and is in turn owned by Brett Rentmeester (75% or more). The leadership team of Windrock Wealth Management includes Chief Compliance Officer Brett Rentmeester. It has 5 employees, 4 of them in advisory roles.
Leadership
- Brett RentmeesterManaging Member/Chief Compliance Officer
Investment adviser representatives
4 representatives listed in the SEC register as of 9 October 2026.
- Christopher Patrick Casey
- Austin Miller Kent
- Brandy C Maben
- Brett Kristian Rentmeester
Staff
- 5 employees
- 4 in advisory functions
- 4 state-registered reps
- 1 soliciting firm
- Owns 75% or more of Windrock Wealth Management LLC
Declaration of Trust of Brett K. Rentmeester Dated August 14, 2008
Control person · since September 2012
- Owns 75% or more of Declaration of Trust of Brett K. Rentmeester Dated August 14, 2008
Brett Rentmeester
Control person · since August 2008
- Owns 75% or more of Windrock Wealth Management LLC
Oceanrock, LLC
Control person · since December 2020
- Owns 75% or more of Oceanrock, LLC
Declaration Trust of Brett K. Rentmeester Dated August 14, 2008
Control person · since December 2020
Windrock Wealth Management’s regulatory assets grew 1.7× from $214M (March 2021) to $363M (March 2026); clients rose from 33 to 83 and employees from 2 to 5.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | Employees | Offices |
|---|---|---|---|---|
| March 2026 | $363M | 83 | 5 | 1 |
| July 2025 | $291M | 73 | 4 | 1 |
| March 2024 | $415M | 69 | 4 | 1 |
| May 2023 | $343M | 59 | 3 | 1 |
| February 2022 | $356M | 38 | 2 | 1 |
| March 2021 | $214M | 33 | 2 | 1 |
Besides its headquarters, Windrock Wealth Management has 0 offices, with 1 listed address in Illinois.
Illinois · 1 listed address
- 225 West Jefferson Avenue, Suite 2, NapervilleHQ
Contact and registration details
- Legal name
- Windrock Wealth Management LLC
- Headquarters
- 225 West Jefferson Avenue, Suite 2, Naperville, IL 60540
- Website
- windrockwealth.com
- Phone
- 312-650-9593
- @2975037
- SEC file
- 801-106722
- Founded
- 2012
- Structure
- Arizona LLC
- Fiscal year end
- December
Windrock Wealth Management uses Charles Schwab ($166M) as custodian for its separately managed accounts. Windrock Wealth Management does not have custody of client assets.
- Charles SchwabCharles Schwab & Co., Inc. · San Francisco, CA · $166M100%
At year end, Windrock Wealth Management’s separately managed accounts were mostly in funds (76%) and bonds (14%).
What the accounts hold
- Stocks7%
- Funds76%
- Pooled vehicles42%
- Registered funds34%
- Bonds14%
- U.S. government and agency bonds10%
- Investment grade corporate bonds4%
- Cash3%
How many clients does Windrock Wealth Management have?
Windrock Wealth Management has 83 clients and manages $363 million for them, as of March 2026. They include 51 high-net-worth individuals and 32 individual clients.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 17 March 2026
What services does Windrock Wealth Management offer?
Windrock Wealth Management provides portfolio management for individuals and small businesses, selecting other managers, publishing newsletters, family office services, and retirement plan services.
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 Windrock Wealth Management charge?
Windrock Wealth Management charges 0.25%–1.50% a year for its Wealth Management Services. Each asset band is charged at its own rate. The fee is billed in advance, is negotiable and has a $7,500 annual minimum.
Source: WINDROCK WEALTH MANAGEMENT LLC ADV PART 2A AND 2B, filed 17 March 2026
Which custodians does Windrock Wealth Management use?
Windrock Wealth Management’s separately managed account assets are held at Charles Schwab & Co., Inc. (San Francisco, CA), with $166M. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 17 March 2026
How many financial advisors does Windrock Wealth Management have?
Windrock Wealth Management has 4 investment adviser representatives registered with state securities authorities, out of 5 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 Windrock Wealth Management invest in?
At the end of its last fiscal year, Windrock Wealth Management’s separately managed accounts held 42% pooled vehicles (private funds and similar), 34% registered funds (mutual funds, ETFs, BDCs), 10% U.S. government and agency bonds, 7% exchange-traded equities, 4% investment grade corporate bonds and 3% cash and equivalents. 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 Windrock Wealth Management?
Windrock Wealth Management is owned through a trust and a holding company by Brett Rentmeester and Declaration Trust of Brett K. Rentmeester Dated August 14, 2008. Its direct owners are Declaration of Trust of Brett K. Rentmeester Dated August 14, 2008 (75% or more) and Oceanrock, LLC (75% or more).
Source: Form ADV Part 1A, Schedules A and B, filed 17 March 2026
How does Windrock Wealth Management get paid?
Windrock Wealth Management is paid through a percentage of assets under management, hourly charges, 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 Windrock Wealth Management registered with the SEC?
Yes, Windrock Wealth Management has been registered with the SEC as an investment adviser since 6 October 2015. Its CRD number is 166124 and its SEC file number is 801-106722.
Source: Form ADV Part 1A, Item 1, filed 17 March 2026; IAPD firm record
How do I contact Windrock Wealth Management?
Windrock Wealth Management’s main office is at 225 West Jefferson Avenue, Suite 2, Naperville, IL 60540. Its phone number is 312-650-9593. Its website is windrockwealth.com.