Ethan Thomas Siekkinen
Investment Adviser Representative at Plante Moran Financial Advisors
Professional summary
Compiled by AdvisorFinder from public regulatory records. This advisor has not provided a personal biography.
Ethan Thomas Siekkinen is an investment adviser representative with Plante Moran Financial Advisors in Auburn Hills, MI, where they have been registered since 2025, the year they entered the securities industry. They have passed the Series 65 (investment adviser) exam. They are registered to provide investment advice in Michigan.
Office
Advisors at this office: 6
Branch office as filed with FINRA, counting current advisors in the directory who work there.
Registrations & licenses
- Investment adviser:
- Michigan
Registration requirements vary by state and service. Contact the advisor's firm to confirm whether they can serve you.
Financial-firm registration history
Registration history as reported to FINRA, most recent first.
Reported employment history
Employment the advisor reported on their SEC/FINRA filings, as of October 8, 2026. It may not be a complete history.
- Plante Moran Financial AdvisorsAug 2024 – no end date reportedAuburn Hills, MI
- Plante Moran Financial AdvisorsJun 2023 – Aug 2023Auburn Hills, MI
- J Wilson Wealth ManagementApr 2021 – Nov 2022Davison, MI
- Rizzo Lawn CareMay 2023 – Jun 2023Rochester Hills, MI
- Rizzo Lawn CareMay 2022 – Aug 2022Rochester Hills, MI
- Rizzo Lawn CareMay 2021 – Aug 2021Rochester Hills, MI
- Rizzo Lawn CareMay 2020 – Aug 2020Rochester Hills, MI
- The Ohio State UniversityAug 2020 – May 2024Columbus, OH
- Lake Orion High SchoolAug 2016 – Jun 2020Lake Orion, MI
Official records & sources
Data as of August 10, 2026 · Source: SEC IAPD & FINRA BrokerCheck
About Plante Moran Financial Advisors
These details describe the firm overall. Individual advisors' services, clients, and fees may differ.
Fee arrangements the firm reports
- Percentage of assets under management
- Hourly
- Fixed fee
Arrangements the firm reports on its Form ADV; this advisor may not charge every fee listed. Estimated from the firm's Form ADV — individual terms may differ. Not a quote.
Services the firm offers
Client types the firm serves
Firm assets under management
$25B+
- Firm disclosures (Form ADV)
- No disciplinary history reportedVerify on SEC IAPD
- Advisors listed on AdvisorFinder:
- 131
- Offices listed on AdvisorFinder:
- 13
- Main office:
- Southfield, MI
- SEC file number:
- 801-44058
Counts reflect AdvisorFinder directory coverage, not necessarily the firm's complete network.
Form ADV data as of September 28, 2026
View full firm profileOther advisors at Plante Moran Financial Advisors
Showing 12 of 131 in the directory
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This profile was compiled and published by AdvisorFinder as editorial content using publicly available information from the SEC's IAPD database and FINRA BrokerCheck. Ethan Thomas Siekkinen has not reviewed, approved, or endorsed this profile and is not responsible for its accuracy. Regulatory records change over time — always verify the current record directly on BrokerCheck or SEC.gov before making any decision. AdvisorFinder may be compensated for referrals generated through this page.
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