Oak Brook Advisors, LLC
Updated today
Data sourced from SEC public records (and other sources when available). Refreshed weekly • Updated today.
Client assets under management
$17,000,000
Clients
37
16% high-net worth
Advisors
1
of 2 employees
Firm type
Independent
1 advisor
Fewer clients per advisor generally means more personalized, proactive service. Higher ratios may reflect streamlined models or lower minimums.
Clients per advisor
37
HighAverage account size
$459,459
About
Oak Brook provides investment advisory and financial planning services to individuals (including high-net-worth clients), trusts, estates, businesses, and retirement plans. Services include customized portfolio construction and ongoing management using low-cost mutual funds and ETFs, occasional individual securities or options, and referrals to independent managers as needed.
The firm emphasizes long‑term portfolio strategies informed by fundamental and technical analysis, regular client communication, and periodic rebalancing; it may also recommend tactical reallocations, tax‑sensitive retention of legacy positions, or cash hedges when appropriate. Accounts are managed on a non‑discretionary basis, so the advisor seeks client approval prior to executing trades and provides periodic reporting and oversight.
What is noteworthy about Oak Brook is that all client assets are managed on a non‑discretionary basis, a practice that is uncommon among peers in this category. The firm’s principal also maintains an active, licensed insurance practice—earning commissions on insurance product sales and spending a significant portion of time on that activity—which the firm discloses as a potential conflict of interest.
Client services
Financial planning
Portfolio management
Selection of other advisers
Expertise
Active portfolio management
Options & derivatives strategies
Fee options
$0 - $100,000: 1.50% annually $100,001 - $500,000: 1.00% annually $500,001 - $1,000,000: 0.50% annually $1,000,001+: 0.25% annually
Up to $200 per hour for financial planning services
Fee-only: Investment advisory fees based on tiered AUM schedule; Financial planning charged hourly up to $200/hour
Main office location
Oak Brook Advisors, LLC
8470 Enterprise Circle
Lakewood Ranch FL 34202, United States
Number of offices
2
Most active in
Oak Brook Advisors, LLC has reported serving >5 clients in these states in the last 12 months.
Florida · Illinois · North Carolina
Disclosures
Firm disclosures are reported in Form ADV Part 1A, Item 11. They include criminal charges, regulatory actions, civil proceedings, and professional disciplinary events involving the firm or its advisory affiliates.
Exclamation point means they have disclosures of this type. Check mark means no disclosures of this type were found.
Business activities & affiliations
These affiliations may expand the services this firm offers and, in some cases, how they are compensated.
Is not active or affiliated with:
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Insurance agent
They sell insurance products and may earn commissions on those sales.
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Broker-dealer / trader
They provide brokerage services and may earn transaction-based compensation in addition to advisory fees.
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Bank
They're affiliated with a bank that may offer its own financial products and services.
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Trust company
They provide trust and estate administration services, typically for separate fees.
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Fund sponsor
They manage or sponsor investment funds and may earn management or performance-based fees if clients invest in them.
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Accountant / CPA / tax prep
They offer tax and accounting services, typically for separate fees.
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Lawyer
They provide legal services, typically billed separately.
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Real estate agent
They facilitate real estate transactions and may earn commissions.
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Other specialized services
They may provide services such as pension consulting or municipal advisory work, typically for separate fees.
Forms ADV
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