Gagnon Advisors, Llc
- Regulatory AUM
- $187M
- Discretionary
- $187M
- Clients
- 3
- Avg AUM / client
- $62.4M
- Accounts
- 3
- Employees
- 10
AUM over time
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| # | Issuer | Class | Value | Shares | % 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 type | Clients | AUM | % 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
| Fund | Type | Domicile | Gross assets | Owners |
|---|---|---|---|---|
| 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)
| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| 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)
| Entity | Title / status | Since | Sch. | 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)
| Fund | Type | Gross assets | Min. investment | Owners |
|---|---|---|---|---|
| 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)
| Form | Period | Size | |
|---|---|---|---|
| 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
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) ↗