AUMdb

Gagnon Securities, Llc

SEC-registered Broker-Dealer (Dually Registered) · Small ($100M–$1B) CRD 103727 · SEC file 801-64836 · New York, NY · WWW.GAGNONSEC.COM
☆ Save with Pro ADV data as of May 04, 2026
Regulatory AUM
$530M
Discretionary
$530M
Clients
1,202
Avg AUM / client
$441K
Accounts
1,202
Employees
19

AUM over time

$138M $785M
Dec 8, 2011 May 4, 2026

Reported AUM from Form ADV filings, plotted by filing date · as of May 04, 2026

Who they serve

Client typeClientsAUM% of AUM
Individuals (non-high net worth) 1,025 $248M 46.7%
High net worth individuals 33 $224M 42.3%
Corporations and other businesses 144 $58.0M 10.9%

People (20)

roster as of Jul 20, 2026
NameRole / titleCredentialsWith firm sinceOwnership
Matthew Howard Jampole Member Dec 2004 (22y) Less than 5%
Henry Carl Beinstein Member Apr 2005 (21y) Less than 5%
Jonathan Williams Robohm Member Apr 2005 (21y) Less than 5%
Lisa Catherine Ferrante Member Feb 2006 (21y) Less than 5%
Alison Anne Tranchida Member Mar 2007 (19y) Less than 5%
Willis Gitt Taylor Member May 2008 (18y) 5% – 10%
Marianne D'alessandro Member Mar 2011 (15y) Less than 5%
Simmons, Michelle Member Oct 2014 (12y) Less than 5%
Adrienne Michelle Garofalo Member Mar 2015 (11y) Less than 5%
Cynthia Andrea Roberts Member Jan 2018 (9y) Less than 5%
Sarah G Jilla Member Jan 2018 (9y) Less than 5%
James Matthew Cappello Member Jan 2021 (6y) Less than 5%
Brian Joseph Gagnon Registered representative Jul 2021 (5y)
Dwight Eisenhower Lee Registered representative Jul 2021 (5y)
Gabrielle Rosenfeld Registered representative Jul 2021 (5y)
Maureen Oneill Drew Registered representative Jul 2021 (5y)
James Colby Registered representative Nov 2021 (5y)
Jessica Rose Vingiello Registered representative Nov 2021 (5y)
Neil Joseph Gagnon Registered representative Nov 2021 (5y)
Edward Francis Alf Registered representative Jan 2026 (1y)

Entity owners (Schedule A/B)

EntityTitle / statusSinceSch.Ownership
Gagnon, Neil Joseph Manager/Ceo Oct 1999 A 50% – 75%
Gagnon, Brian Joseph Member Jan 2002 A 5% – 10%
Drew, Maureen Oneill Member Jan 2002 A 5% – 10%
Lee, Dwight Eisenhower Member Aug 2005 A Less than 5%

Undisclosed: 0% – 35% of the firm is not attributable from the filed Schedule A bands.

Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.

Documents (1 archived)

FormPeriodSize
Form ADV (full filing) 05/04/2026 1.34 MB View · PDF · Source ↗

Archived copies of the firm's regulatory filings, versioned by content hash.

Disciplinary disclosures

Regulatory as of Mar 28, 2024

Allegations: ON SEPTEMBER 10, 2014 NEIL GAGNON CONSENTED TO THE ENTRY OF AN ORDER INSTITUTING ADMINISTRATIVE AND CEASE-AND-DESIST PROCEEDINGS ("ORDER") BY THE U.S. SECURITIES AND EXCHANGE COMMISSION (THE "SEC"). IN THE ORDER, THE SEC FOUND THAT MR. GAGNON FAILED TO TIMELY FILE BENEFICIAL OWNERSHIP REPORTS REQUIRED UNDER SECTION 13(D) AND SECTION 16(A) OF THE SECURITIES EXCHANGE ACT OF 1934 ("EXCHANGE ACT"). SPECIFICALLY, THE SEC ALLEGED THAT MR. GAGNON FAILED TO FILED TIMELY AMENDMENTS TO ITS SCHEDULES 13G'S AND CONTINUED TO FILE AS A PASSIVE INVESTOR ON A SCHEDULE 13G, DESPITE OWNING IN EXCESS OF 20% OF THE OUTSTANDING VOTING SECURITIES OF A PARTICULAR ISSUER, THEREBY REQUIRING A SCHEDULE 13D FILING AND SUBSEQUENT AMENDMENTS. FURTHER, MR. GAGNON FAILED TO MAKE TIMELY REPORTS ON FORMS 4 AND 5 TO IN ACCORDANCE WITH SECTION 16(A) OF THE EXCHANGE ACT. WITHOUT ADMITTING OR DENYING THE SEC'S FINDINGS, MR. GAGNON AGREED TO CEASE AND DESIST FROM FUTURE VIOLATIONS OF SECTIONS 13(D) AND 16(A) OF THE EXCHANGE ACT AND RULES 13D-1, 13D-2 AND 16A-3 THEREUNDER, AND TO PAY A CIVIL MONETARY PENALTY OF $75,000. Status: Final Summary: WITHOUT ADMITTING OR DENYING THE VIOLATIONS, NEIL GAGNON CONSENTED TO THE ENTRY OF AN SEC ORDER FINDING THAT MR. GAGNON FAILED TO MAKE TIMELY FILINGS IN ACCORDANCE WITH SECTIONS 13(D) AND 16(A) OF THE SECURITIES EXCHANGE ACT OF 1934. NEIL GAGNON SUBMITTED AN OFFER OF SETTLEMENT WHICH WAS ACCEPTED BY THE SEC. WITHOUT ADMITTING OR DENYING THE VIOLATIONS, MR. GAGNON WILL PAY A CIVIL MONETARY PENALTY OF $75,000. MR. GAGNON ALSO AGREED TO CEASE AND DESIST FROM COMMITTING OR CAUSING ANY VIOLATIONS OF SECTIONS 13(D) AND 16(A) OF THE SECURITIES EXCHANGE ACT OF 1934 AND RULES 13D-1, 13D-2 AND 16A-3 THEREUNDER.

Disclosure text reproduced verbatim from the firm's own Form ADV filings.

How they charge

  • Percentage of assets under management
  • Commissions

Services

  • Portfolio management for individuals/small businesses

Custody

Reported custodians

Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).

Firm reports it does not have custody of client funds or securities (Item 9.A).

Source

All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: May 04, 2026.

View current Form ADV (SEC/IAPD) ↗