SourcingSourcing

FLAGSHIP HARBOR ADVISORS, LLC

C40
CRD 155733·SEC 801-71997·BOSTON, MA
AUM
$3.42B
$1B+
Est. Revenue
$34.2M
@ 1% on AUM
Est. EBITDA
$10.3M
@ 30% margin
Est. Deal Value
$82.1M
@ 8× EBITDA

Identity

Registrations & legal identity

Legal name
FLAGSHIP HARBOR ADVISORS, LLC
CRD
155733
SEC file #
801-71997
EIN
274297661
DBA names
3meritus Wealth ManagementTrestlebridge CapitalTinkham Wealth ManagementThrive Wealth Strategies

Economics

AUM
$3.42B
AUM band
$1B+
AUM trajectory
'20'26
$1.40B → $3.42B▲ +145%
Client mix
Individuals Other4,724
Individuals High Net Worth2,556
Corporations37
Pension Profit Sharing Plans29
Charitable Organizations27

Operations

Employees (total)
61
Advisory staff (per ADV)
57
Advisory staff (5-yr trend)
'20'26
54 advisors → 57 advisors▲ +6%
Primary office
BOSTON MA
Branches
Count50

Custodian & Brokerage

Primary custodian
LPL Financiallow confidence
Services offered
Financial planningPortfolio mgmt — individualsSelection of other advisersEducational Seminars Workshops
Fee basis
% of AUMHourly chargesFixed fees

Filings

Latest ADV filing
01/28/2026
ADV-W filed at
—
Website
flagshipharborsouthshore.com

Compliance

Disclosures (firm)
2
Trademark
—
Additional signalsExpand ▾

Ownership & succession ★

Who controls the firm + pre-computed succession flags

Top Owner Name
KAUFMAN, DAVID, JAY
Top Owner Pct
87.5
Top Owner Entity Kind
I
Owner Count
2
Control Persons
KAUFMAN, DAVID, JAY
SAWYER, JOHN, PORTER
Solo Advisor Indicator
No
Succession Risk Solo Owner
Yes
Is Parent Owned Subsidiary
No

Availability / M&A ★

Already-acquired = skip; deal comps

Adv W Filed
No

Web presence ★

Stale website = winding down

Web Signal Quality
ok
Rdap Domain
FLAGSHIPHARBORSOUTHSHORE.COM
Rdap Domain Creation Date
2018-06-15T14:06:04Z
Rdap Firm Age Years
8
Rdap Firm Age Band
5-10y
Rdap Registrar
GoDaddy.com, LLC

Retirement-plan book (Form 5500) ★

401(k)/plan business — cross-sell value

Retirement Plan Book
No

SEC EDGAR

Edgar Cik
0001691766
Edgar Registered
Yes
Edgar Filing Count
41
Edgar First Filing Date
2017-05-16
Edgar Last Filing Date
2026-04-28
Edgar 13f Count
39
Edgar 13f Latest AUM Estimate
Filing Date2026-04-28
Accession0001691766-26-000004

Compliance & brand

Firm Registration Status
active

All other collected signals (17)

Everything else we've pulled for this record, not yet curated into a section.

Adv W Recently Filed
No
Bc Firm Active Bc Count
50
Bc Firm Active IA Count
50
Bc Firm IAR Count
50
Custodian Candidates
Full
Lpl Financial4
E*trade4
Edgar Addresses
Mailing
346 COMMERCIAL STREETBOSTON, MA 02109
Business
346 COMMERCIAL STREETBOSTON, MA 02109
Edgar EIN
274297661
Edgar Recent Filings
13F-HR2026-04-28 · 0001691766-26-000004
13F-HR2026-01-21 · 0001691766-26-000003
Firm Has Custody
No
Mailing Office Differs
No
Rdap Domain Expiration Date
2028-06-15T14:06:04Z
Rdap Domain Last Changed
2023-06-16T19:38:19Z
Rdap Nameservers
Ns47.domaincontrol.comNs48.domaincontrol.com
Rdap Secure Dns Enabled
No
Rdap Status
Client Delete ProhibitedClient Renew ProhibitedClient Transfer ProhibitedClient Update Prohibited
Top Owner CRD
1526940
Trust Company Affiliate
No

People (50)

50
KAUFMAN, DAVID, JAY
IAR · Direct Owner · 87.5%
1526940
SAWYER, JOHN, PORTER
IAR · Executive Officer · 2.5%
3260819
RODNEY MELVIN LAURENZ
IAR
4568238
ADAM MICHAEL HOGUE
IAR
6031010
EDWARD JOSEPH MARINUCCI
IAR
2528997
JESSE P BESSETT
IAR
4394649
ADAM BATEMAN
IAR
5412669
MARK WILLIAM SHEVLIN
IAR
2519659
THOMAS MARSHALL WILLIAMS
IAR
2515270
KIMBERLY ANN KELLY
IAR
6422215
GREGORY JAMES PRAYZNER
IAR
4837609
BRYAN MARC GRAVEL
IAR
5634671
KYLE HURLEY
IAR
7350813
DARIA ROSE GRADY
IAR
6382115
KELSEY LILLIAN STRAIT
IAR
6332119
JASON TAYLOR
IAR
5686395
FATIMA AWADA
IAR
7062577
DARRELL MITCHELL AVERY
IAR
4622963
SCOTT MICHAEL MONDEAU
IAR
2208366
JONATHAN Edward COUGHLIN
IAR
6738897
STEVEN BRETT BRUCE
IAR
2310778
RICHARD BRIAN ANDERSON
IAR
5295717
IRINA V ANDREASEN
IAR
4456965
LEE GEORGE PAPPAS
IAR
2572405
LESTER RUSSELL KEFAUVER
IAR
5295768
PHILIP JOHN MATHEY
IAR
4931130
DANIEL FRANCIS MORAN
IAR
4602692
NATHAN ROBERT WALLER
IAR
6339529
SCOTT DAVID NELSON
IAR
3237837
MATTHEW AARON MORROW
IAR
4012402
ALAN ALAEDDIN FATEMI
IAR
4935681
TIMOTHY BENJAMIN WYAND
IAR
4835214
MICHAEL RAY SANCHEZ
IAR
5149454
JULIAN BRETT MORRIS
IAR
4835616
JOHN MARTIN FENTON
IAR
2756603
WAYNE JOSEPH BRADLEY
IAR
1974810
ROBERT MICHAEL THORNE
IAR
2163929
DWAYNE ANTHONY HALL
IAR
4587184
GREGORY PAUL MUNROE
IAR
2282929
CHRISTOPHER MICHAEL SHEEHAN
IAR
4009123
MICHAEL KRASCO
IAR
4026071
SIEGLINDE AIGNER-CROOKS
IAR
2953417
JASON RYAN DUGUAY
IAR
4991208
DANIEL EDWARD PARKER
IAR
4563946
THOMAS OWEN SHEPARD
IAR
2786981
BRENDAN MICHAEL LAMMERS
IAR
4877744
TIMOTHY PETER HIGGINS
IAR
3262957
KEVIN MICHAEL SMITH
IAR
4316367
JEFFERSON STACY JONES
IAR
4567112
QUENTIN WILLIAM CLIMER
IAR
2688190