William Martens is a registered investment advisor at Mach-1 Financial Group, LLC, based in Rogers, AR. William operates on a fee-only basis, meaning they do not earn commissions from product sales. Their practice areas include Estate Planning, High Net Worth, Retirement Planning, Tax Planning. Their firm serves 1,566 clients with $550M in assets under management.

Compensation
Fee-Only (% of Portfolio)Fixed/Hourly
Firm Size
9 advisors
IM Fee
Planning only
Assets Under Management
$546.3M

Fee Structure

Investment management only (planning not offered)
  • Estate planning coordination — Up to $10,000 depending on the complexity of your situation, covering the creation of wills, trusts, living wills, and powers of attorney through an online platform.
One-Time Plan:Up to $10,000
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Location

1001 S. 52nd Street, Suite 100, Rogers, AR, 72758

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History

Regulatory History
Clean regulatory record

No disclosures, customer disputes, or regulatory actions on file.

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Employment History
Current Registrations
Mach-1 Financial Group, LLC
June 2026 - Present · 5 mos
State Registrations1 state
AR
Advisor

You can work with an advisor not registered in your state. Most advisors can legally serve a small number of clients across state lines without registering.

Exams
No exam information available for this advisor.
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