Brenton Lee Cashore
Investment Adviser Representative at Sentinel Advisory Group, LLC
Professional summary
Compiled by AdvisorFinder from public regulatory records. This advisor has not provided a personal biography.
Brenton Lee Cashore is an investment adviser representative with Sentinel Advisory Group, LLC in Middleton, WI, where they have been registered since 2025. They have worked in the securities industry since 2010 and were previously registered with Commonwealth Financial Network. They have passed 5 industry qualification exams, including the Series 65 (investment adviser), Series 7 (general securities representative), and Series 63 (state securities agent). They are registered to provide investment advice in Texas and Wisconsin.
Office
Advisors at this office: 8
Branch office as filed with FINRA, counting current advisors in the directory who work there.
Registrations & licenses
- Investment adviser:
- Texas, Wisconsin
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.
- Northwestern Mutual LIFE Insurance CompanyAug 2009 – Jul 2024Milwaukee, WI
- Northwestern Mutual Investment Services, LLCDec 2009 – Jul 2024Middleton, WI
- Northwestern Mutual Wealth Management CompanyMar 2016 – Jul 2024Milwaukee, WI
- Commonwealth Financial NetworkJul 2024 – Dec 2025Waltham, MA
- Sentinel Advisory GroupJul 2024 – no end date reportedMiddleton, WI
Official records & sources
Data as of August 11, 2026 · Source: SEC IAPD & FINRA BrokerCheck
About Sentinel Advisory Group, LLC
These details describe the firm overall. Individual advisors' services, clients, and fees may differ.
Fee arrangements the firm reports
- Percentage of assets under management
- 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
$100M–$500M
- Firm disclosures (Form ADV)
- No disciplinary history reportedVerify on SEC IAPD
- Advisors listed on AdvisorFinder:
- 8
- Offices listed on AdvisorFinder:
- 1
- Main office:
- Middleton, WI
- SEC file number:
- 801-134809
Counts reflect AdvisorFinder directory coverage, not necessarily the firm's complete network.
Form ADV data as of March 2, 2026
View full firm profileOther advisors at Sentinel Advisory Group, LLC
7 other advisors in the directory
Similar advisors in Middleton, WI
Other advisors whose filed branch office is in the same city.
This profile was compiled and published by AdvisorFinder as editorial content using publicly available information from the SEC's IAPD database and FINRA BrokerCheck. Brenton Lee Cashore 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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