AUMdb
GA

Gagnon Advisors, Llc

SEC-registered Private Fund Manager · Small ($100M–$1B) CRD 161697 · SEC file 801-79567 · New York, NY
☆ Save with Pro ADV data as of Feb 13, 2026
Regulatory AUM
$187M
Discretionary
$187M
Clients
3
Avg AUM / client
$62.4M
Accounts
3
Employees
10

AUM over time

$103M $223M
Apr 1, 2014 Feb 13, 2026

Reported AUM from Form ADV filings, plotted by filing date · as of Feb 13, 2026

Investments (13F portfolio — 22 positions, $135,928,828)

13F period Mar 31, 2026
#IssuerClassValueShares% of 13F% of AUM
1 Enterprise Prods Partners L P COM $12,860,946 339,877 9.46% 6.87%
2 Ameresco Inc CLA $12,056,349 472,798 8.87% 6.44%
3 Equinix Inc COM $10,503,272 10,715 7.73% 5.61%
4 Navigator Hldgs Ltd SHS $10,435,900 539,881 7.68% 5.57%
5 Ishares Tr 0-3 MNTH TREASRY $9,625,210 95,621 7.08% 5.14%
6 Genedx Holdings Corp COM CL A $9,519,009 148,225 7.0% 5.08%
7 Caredx Inc COM $9,251,005 532,892 6.81% 4.94%
8 Pacira Biosciences Inc COM $7,969,596 352,637 5.86% 4.25%
9 Profound Med Corp COM NEW $6,234,965 962,186 4.59% 3.33%
10 Freshworks Inc CLASS A COM $6,232,982 776,212 4.59% 3.33%
11 Biolife Solutions Inc COM NEW $5,232,060 274,217 3.85% 2.79%
12 Five9 Inc COM $5,101,322 336,277 3.75% 2.72%
13 Blackline Inc COM $4,811,850 130,050 3.54% 2.57%
14 Amplitude Inc COM CL A $4,330,611 634,987 3.19% 2.31%
15 Doubleverify Hldgs Inc COM $4,161,371 438,039 3.06% 2.22%
16 Ora Sure Technologies Inc COM $3,622,320 1,207,440 2.66% 1.93%
17 Vertex Inc CL A $3,531,925 297,050 2.6% 1.89%
18 Hinge Health Inc CL A $3,115,147 80,787 2.29% 1.66%
19 Alpha & Omega Semiconductor Lt SHS $2,663,543 120,196 1.96% 1.42%
20 Marine Max Inc COM $2,631,369 97,242 1.94% 1.4%
21 Kaltura Inc COM $1,723,872 1,413,010 1.27% 0.92%
22 Cnfinance Hldgs Ltd SPON ADS $314,204 80,359 0.23% 0.17%

Top 25 of 22 positions from the manager's latest Form 13F · source filing (EDGAR) ↗. 13F covers long US-listed positions only. "% of AUM" is share of the firm's total regulatory AUM (Form ADV Item 5.F).

Who they serve

Client typeClientsAUM% of AUM
Pooled investment vehicles (non-investment companies) 3 $187M 100.0%

Private funds (4)

Reported in Form ADV Section 7.B.(1), filing of Mar 2024 · $227M combined gross assets

FundTypeDomicileGross assetsOwners
Gagnon Investment Associates Master Fund master Hedge Fund Cayman Islands $85.3M 72
Gis Fund Of Funds Llc Hedge Fund Delaware $56.6M 52
Gagnon Investment Associates Llc feeder Hedge Fund Delaware $52.8M 47
Gagnon Investment Associates Offshore feeder Hedge Fund Cayman Islands $32.5M 25

People (9)

NameRole / titleCredentialsWith firm sinceOwnership
Neil Joseph Gagnon Chief Executive Officer Feb 2002 (25y) 25% – 50%
Brian Joseph Gagnon Member Jan 2009 (18y) 10% – 25%
Maureen Oneill Drew Member Jan 2009 (18y) 10% – 25%
Willis Gitt Taylor Member Jan 2009 (18y) 10% – 25%
Alison Anne Tranchida Operations Manager Jan 2018 (9y) Less than 5%
Lisa Catherine Ferrante Chief Compliance Officer Jan 2018 (9y) Less than 5%
Marianne D'alessandro Chief Financial Officer Jan 2018 (9y) Less than 5%
Dwight Eisenhower Lee Member Apr 2022 (4y) Less than 5%
Jonathan Williams Robohm Member Apr 2022 (4y) Less than 5%

Entity owners (Schedule A/B)

EntityTitle / statusSinceSch.Ownership
Gagnon Administrative Services Llc Owner Jul 2009 A 75% or more

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.

Private funds (4, $227M gross assets)

FundTypeGross assetsMin. investmentOwners
Gagnon Investment Associates Master Fund Hedge Fund $85.3M $250K 72
Gis Fund Of Funds Llc Hedge Fund $56.6M $500K 52
Gagnon Investment Associates Llc Hedge Fund $52.8M $250K 47
Gagnon Investment Associates Offshore Hedge Fund $32.5M $250K 25

From Form ADV Section 7.B private fund reporting.

Documents (1 archived)

FormPeriodSize
Form ADV (full filing) 02/13/2026 2.25 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 FILED 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 Sanction Detail: N/A 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
  • Performance-based fees

Services

  • Portfolio management for pooled investment vehicles

Custody

Firm reports having custody of client funds or securities (Item 9.A).

No custodian data reported or mined yet.

Source

All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Feb 13, 2026.

View current Form ADV (SEC/IAPD) ↗