John William Slattery
Investment Adviser Representative at ARCA Wealth, LLC
Professional summary
Compiled by AdvisorFinder from public regulatory records. This advisor has not provided a personal biography.
John William Slattery is an investment adviser representative with ARCA Wealth, LLC in Portsmouth, NH, where they have been registered since 2026. They have worked in the securities industry since 2023 and were previously registered with KEY Investment Services LLC. They have passed 3 industry qualification exams, including the Series 66 (combined investment adviser and state securities agent) and Series 7 (general securities representative). They are registered to provide investment advice in New Hampshire.
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 Hampshire
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.
- Maine Medical CenterJun 2015 – Feb 2017Portland, ME
- Slattery's Village Trading PostFeb 2017 – Apr 2020Portland, ME
- UnemployedApr 2020 – Nov 2020Poland, ME
- Camden National BankNov 2020 – May 2022Auburn, ME
- KeyBank NAMay 2022 – Mar 2026Brunswick, ME
- Key Investment Services LLCMay 2023 – Mar 2026Brooklyn, OH
- Granite Bay Wealth ManagementMar 2026 – no end date reportedPortsmouth, NH
Official records & sources
Data as of August 10, 2026 · Source: SEC IAPD & FINRA BrokerCheck
About ARCA Wealth, 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
- Hourly
- Fixed fee
- Firm account minimum
- $500,000 (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:
- 10
- Offices listed on AdvisorFinder:
- 1
- Main office:
- Portsmouth, NH
- SEC file number:
- 801-92174
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 ARCA Wealth, LLC
9 other advisors in the directory
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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. John William Slattery 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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