Oak Street Investment Advisors provides financial planning, portfolio management for individuals and small businesses, and portfolio management for pooled vehicles. Financial planning was provided to 26–50 clients last fiscal year. The firm advises 6 private funds.
Oak Street Investment Advisors reports 72 clients. They include 36 individual clients, 29 high-net-worth individuals and 7 pooled investment vehicles. Of its assets, 100.0% ($125M across 180 accounts) are managed with discretion. It advised 4 clients without assets under management last fiscal year.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 50% | 6% |
| High-net-worth individuals | 40% | 47% |
| Pooled investment vehicles | 10% | 47% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 36 | $7.49M | 6.0% | $208K |
| High-net-worth individuals | 29 | $58.9M | 46.9% | $2.03M |
| Pooled investment vehicles | 7 | $59.1M | 47.1% | $8.44M |
| Total | 72 | $125M | 100% | $1.74M |
- Clients
- 36
- Regulatory AUM
- $7.49M
- AUM share
- 6.0%
- Avg. per client
- $208K
- Clients
- 29
- Regulatory AUM
- $58.9M
- AUM share
- 46.9%
- Avg. per client
- $2.03M
- Clients
- 7
- Regulatory AUM
- $59.1M
- AUM share
- 47.1%
- Avg. per client
- $8.44M
Total
- Clients
- 72
- Regulatory AUM
- $125M
- AUM share
- 100%
- Avg. per client
- $1.74M
- Clients outside the U.S.
- 0%
- Clients advised without assets under management last fiscal year
- 4
- Private funds advised
- 6
- Financial planning clients last fiscal year
- 26–50
Oak Street Investment Advisors is paid through a percentage of assets under management, hourly charges, fixed fees (other than subscription fees) and performance-based fees. The reviewed brochures do not disclose an asset-based fee rate. Read the SEC-filed brochure. The brochure also prices 2 other services, listed under fee details.
Fee details and sources
Other fees
- Financial Planning
- Fixed fees ranging from $3,600 to $8,200 depending on scope; ongoing work billed hourly at up to $300 an hour.
- Tax Preparation
- A base fee of $500 for an individual 1040 with schedules B and D and one state return; additional schedules $75 to $200 each; Form 1065 minimum $1,000.
Jacob Milder owns 75% or more of Oak Street Investment Advisors. The leadership team of Oak Street Investment Advisors includes Chief Compliance Officer Jacob Milder. It has 1 employee.
Staff
- 1 employee
- 1 in advisory functions
- 1 state-registered rep
- Owns 75% or more of Oak Street Investment Advisors, LLC
Jacob Milder
Control person · since March 2017
Oak Street Investment Advisors’ regulatory assets grew from $102M (June 2023) to $125M (September 2026); clients rose from 67 to 72 and employees were 1 in both filings.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | StaffEmployees | Offices |
|---|---|---|---|---|
| Sep 2026September 2026 | $125M | 72 | 1 | 2 |
| Feb 2025February 2025 | $113M | 61 | 1 | 2 |
| Jun 2024June 2024 | $112M | 65 | 1 | 2 |
| Jun 2023June 2023 | $102M | 67 | 1 | 2 |
Besides its headquarters, Oak Street Investment Advisors has 1 office (1 private residence, listed without an address), with 1 listed address in 1 state.
Colorado · 1 listed address
- 5500 Greenwood Plaza BLVD, Suite 130, Greenwood VillageHQ
Other business names
Oak Street Investment Advisors has reported 1 other business name to the SEC.
- Oak Street Tax Advisory
Contact and registration details
- Legal name
- Oak Street Investment Advisors, LLC
- Headquarters
- 5500 Greenwood Plaza BLVD, Suite 130, Greenwood Village, CO 80111
- Website
- oakstreetinvestments.com
- Phone
- 720-515-6822
- SEC file
- 801-128057
- Structure
- Colorado LLC
- Fiscal year end
- December
Oak Street Investment Advisors’ named custodians for separately managed accounts are Altruist ($18.2M, 58%) and Charles Schwab ($13M, 42%). Oak Street Investment Advisors has custody of $59.5M for 7 clients.
- Charles SchwabCharles Schwab & Co., Inc. · Westlake, TX · $13M42%
- AltruistAltruist Financial LLC · Edgewood, NY · $18.2M58%
At year end, Oak Street Investment Advisors’ separately managed accounts were mostly in funds (92%).
What the accounts hold
- Stocks6%
- Funds92%
- Pooled vehicles47%
- Registered funds45%
- Bonds1%
- Cash1%
How many clients does Oak Street Investment Advisors have?
Oak Street Investment Advisors has 72 clients and manages $125 million for them, as of September 2026. They include 36 individual clients, 29 high-net-worth individuals and 7 pooled investment vehicles.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 25 September 2026
What services does Oak Street Investment Advisors offer?
Oak Street Investment Advisors provides financial planning, portfolio management for individuals and small businesses, and portfolio management for pooled vehicles.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
Which custodians does Oak Street Investment Advisors use?
Oak Street Investment Advisors’ separately managed account assets are held at Altruist Financial LLC (Edgewood, NY), with $18.2M and Charles Schwab & Co., Inc. (Westlake, TX), with $13M. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 25 September 2026
How many financial advisors does Oak Street Investment Advisors have?
Oak Street Investment Advisors has 1 investment adviser representative registered with state securities authorities, out of 1 employees, and 1 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 Oak Street Investment Advisors invest in?
At the end of its last fiscal year, Oak Street Investment Advisors’ separately managed accounts held 47% pooled vehicles (private funds and similar), 45% registered funds (mutual funds, ETFs, BDCs), 6% exchange-traded equities, 1% U.S. government and agency bonds and 1% cash and equivalents. It advises 6 private funds.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Oak Street Investment Advisors?
Oak Street Investment Advisors’ direct owner is Jacob Milder (75% or more).
Source: Form ADV Part 1A, Schedules A and B, filed 25 September 2026
How does Oak Street Investment Advisors get paid?
Oak Street Investment Advisors 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
How do I contact Oak Street Investment Advisors?
Oak Street Investment Advisors’ main office is at 5500 Greenwood Plaza BLVD, Suite 130, Greenwood Village, CO 80111. Its phone number is 720-515-6822. Its website is oakstreetinvestments.com.
