Gagnon Advisors, LLC
In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 13, 2026), Gagnon Advisors, LLC reported 23 stock positions worth $157.5 million. Its top holding was Genedx (WGS) at 10.5% of the portfolio, followed by Ameresco Class A (AMRC, 8.8%) and Sumisho Air Lease (AL, 8.0%). Compared with Q3 2025, it sold out of 1, added to 7 and reduced 2. The biggest buy was Profound Medical (PROF, shares +7%) and the biggest sale Freshworks Class A (FRSH, shares −50%).
- Most Recent 13F
- Q2 2026
- Location
- New York, NY
- CIK
- 0001599466
- Portfolio Value
- $157.5M (Q4 2025)
- SEC Filing
- 0001019056-26-000036 ↗ filed Feb 13, 2026
Holdings Value
Holdings 23 stocks · $157.5M
| WGS Genedx Holdings Corp. | 10.49% | 127,062 | $16.5M | No change |
| AMRC Ameresco Inc. Class A | 8.79% | 472,798 | $13.8M | No change |
| AL Sumisho Air Lease Corp. filed as AIR LEASE CORP | 8.01% | 196,479 | $12.6M | No change |
| EPD Enterprise Products Partners | 6.92% | 339,877 | $10.9M | No change |
| CDNA Caredx Inc. | 6.37% | 532,892 | $10.0M | Add +0.7% |
| NVGS Navigator Holdings Ltd. | 5.69% | 517,066 | $9.0M | No change |
| EQIX Equinix Inc. | 5.21% | 10,715 | $8.2M | No change |
| PROF Profound Medical Corp. | 4.81% | 962,186 | $7.6M | Add +7.3% |
| BL Blackline Inc. | 4.56% | 130,050 | $7.2M | No change |
| FRSH Freshworks Inc. Class A | 4.39% | 564,879 | $6.9M | Reduce -50.0% |
| PCRX Pacira Biosciences Inc. | 4.29% | 260,908 | $6.8M | Add +22.3% |
| FIVN FIVE9 Inc. | 4.28% | 336,277 | $6.7M | Add +100.9% |
| BLFS Biolife Solutions Inc. | 4.21% | 274,217 | $6.6M | No change |
| AMPL Amplitude Inc. Class A | 3.36% | 457,212 | $5.3M | Add +29.5% |
| DV Doubleverify Holdings Inc. | 3.18% | 438,039 | $5.0M | Reduce -30.0% |
| HZO Marinemax Inc. | 2.99% | 194,484 | $4.7M | Add +28.1% |
| VERX Vertex Inc. Class A | 2.95% | 232,479 | $4.6M | No change |
| TMCI Treace Medical Concepts Inc. | 2.39% | 1,534,034 | $3.8M | Add +58.4% |
| NVDA Nvidia Corp. | 1.96% | 16,555 | $3.1M | No change |
| OSUR Orasure Technologies Inc. | 1.86% | 1,207,440 | $2.9M | No change |
| AOSL Alpha & Omega Semiconductor | 1.51% | 120,196 | $2.4M | No change |
| KLTR Kaltura Inc. | 1.47% | 1,413,010 | $2.3M | No change |
| CNF Cnfinance Holdings Ltd. | 0.31% | 80,359 | $486K | No change |
Portfolio Sells Q3 2025 → Q4 2025
Portfolio Buys Q3 2025 → Q4 2025
| PROF Profound Medical Corp. | Add +7.3% | 4.81% | +2.10 |
| FIVN FIVE9 Inc. | Add +100.9% | 4.28% | +1.78 |
| CDNA Caredx Inc. | Add +0.7% | 6.37% | +1.62 |
| AMPL Amplitude Inc. Class A | Add +29.5% | 3.36% | +1.02 |
| PCRX Pacira Biosciences Inc. | Add +22.3% | 4.29% | +0.89 |
| HZO Marinemax Inc. | Add +28.1% | 2.99% | +0.62 |
| TMCI Treace Medical Concepts Inc. | Add +58.4% | 2.39% | −1.63 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 23 | $157.3M | CDNA, AMRC, EPD, WGS, EQIX |
| Q1 2026 | 22 | $135.9M | EPD, AMRC, EQIX, NVGS, SGOV |
| Q4 2025 | 23 | $157.5M | WGS, AMRC, AL, EPD, CDNA |
| Q3 2025 | 24 | $162.0M | AMRC, WGS, FRSH, AL, EPD |
| Q2 2025 | 24 | $148.8M | WGS, PSIX, AL, EPD, CDNA |
| Q1 2025 | 28 | $141.8M | EPD, WGS, AL, PSIX, CDNA |
| Q4 2024 | 26 | $156.2M | WGS, PSIX, EPD, AL, CDNA |
| Q3 2024 | 27 | $154.8M | PSIX, CDNA, WGS, EPD, AL |
| Q2 2024 | 27 | $131.3M | EPD, CDNA, AL, NVGS, AOSL |
| Q1 2024 | 26 | $115.3M | AL, EPD, NVGS, BL, FIVN |