William Aloysious O'Brien
Investment Adviser Representative at GWN Securities Inc.
Professional summary
Compiled by AdvisorFinder from public regulatory records. This advisor has not provided a personal biography.
William Aloysious O'Brien is an investment adviser representative with GWN Securities Inc. in Bordentown, NJ, where they have been registered since 2020. They have worked in the securities industry since 2004 and have been registered with 4 firms, including MML Investors Services, LLC and MSI Financial Services, Inc. They have passed 6 industry qualification exams, including the Series 65 (investment adviser), Series 63 (state securities agent), and Series 6 (investment company and variable products). They are registered to provide investment advice in New Jersey.
Office
Advisors at this office: 5
Branch office as filed with FINRA, counting current advisors in the directory who work there.
Registrations & licenses
- Investment adviser:
- New Jersey
- Broker:
8 states and territories
Florida, New Jersey, New York, North Carolina, Ohio, Pennsylvania, South Carolina, Texas
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.
- Metlife Securities Inc.Jan 2015 – Mar 2017Princeton, NJ
- MML Investors Services, LLCMar 2017 – Jul 2020Princeton, NJ
- Massmutual LIFE Insurance CoJul 2016 – no end date reportedPrinceton, NJ
- GWN Securities, Inc.Jul 2020 – no end date reportedPalm Beach Gardens, FL
Official records & sources
Data as of May 30, 2026 · Source: SEC IAPD & FINRA BrokerCheck
About GWN Securities Inc.
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
- Other
- Firm account minimum
- $2,000 (waivable)
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
$1B–$5B
- Firm disclosures (Form ADV)
- No disciplinary history reportedVerify on SEC IAPD
- Advisors listed on AdvisorFinder:
- 460
- Offices listed on AdvisorFinder:
- 26
- Main office:
- Palm Beach Gardens, FL
- SEC file number:
- 801-62547
Counts reflect AdvisorFinder directory coverage, not necessarily the firm's complete network.
Form ADV data as of April 13, 2026
View full firm profileOther advisors at GWN Securities Inc.
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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. William Aloysious O'Brien 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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