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Jonathan Brooks Marston

Investment Adviser Representative at FLAGSHIP HARBOR ADVISORS, LLC

Boston, MACRD #6768715Dual-registered
No disclosures on record
Sourced from SEC IAPD & FINRA BrokerCheck
Years of Experience
8 yrs
States Registered
1 states
Exams Passed
4

Registrations & licenses

Registration type
Dual-registered
Registered in 1 states
Massachusetts
Examinations passed
Series 66
Uniform Combined State Law Examination
Passed 6/18/2025
Series 7
General Securities Representative Examination
Passed 5/8/2021
SIE
Securities Industry Essentials Examination
Passed 10/1/2018
Series 99
Operations Professional Examination
Passed 2/22/2018

Approximate fees

Estimated from the firm's Form ADV — individual terms may differ. Not a quote.

Primary fee model
Assets Under Management (AUM)
Source

Flagship Harbor Advisors, LLC Form ADV Part 2A (Item 5), most recent annual amendment.

Employment history

Registration history as reported to FINRA, most recent first.

FLAGSHIP HARBOR ADVISORS, LLCCurrent
1/27/2026Boston, MA
NATIONAL FINANCIAL SERVICES LLC
6/28/20221/6/2025Smithfield, RI
CANTELLA & CO., INC.
2/22/20185/13/2022Malden, MA

Official records & sources

Data as of August 10, 2026 · Source: SEC IAPD & FINRA BrokerCheck

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About this profile

This profile was compiled and published by AdvisorFinder as editorial content using publicly available information from the SEC's IAPD database and FINRA BrokerCheck. Jonathan Brooks Marston 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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Jonathan Brooks Marston - Financial Advisor in Boston, MA | AdvisorFinder