Gagnon Securities LLC
In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 13, 2026), Gagnon Securities LLC reported 86 stock positions worth $487.0 million. Its top holding was Caredx (CDNA) at 6.9% of the portfolio, followed by Genedx (WGS, 6.8%) and Sumisho Air Lease (AL, 6.6%). Compared with Q3 2025, it opened 2 new positions, sold out of 2, added to 33 and reduced 40. The biggest buy was Caredx (CDNA, shares +3%) and the biggest sale Aspen Aerogels (ASPN, shares −35%).
- Most Recent 13F
- Q2 2026
- Location
- New York, NY
- CIK
- 0001125725
- Portfolio Value
- $487.0M (Q4 2025)
- SEC Filing
- 0001019056-26-000037 ↗ filed Feb 13, 2026
Holdings Value
Holdings 86 stocks · $487.0M
| CDNA Caredx Inc. | 6.87% | 1,774,890 | $33.4M | Add +2.6% |
| WGS Genedx Holdings Corp. | 6.77% | 253,534 | $33.0M | Reduce -5.8% |
| AL Sumisho Air Lease Corp. filed as AIR LEASE CORP | 6.55% | 496,957 | $31.9M | Reduce -17.9% |
| ENSG The Ensign Group Inc. | 6.46% | 180,549 | $31.5M | Reduce -1.4% |
| AMRC Ameresco Inc. Class A | 5.01% | 832,884 | $24.4M | Reduce -3.1% |
| ISRG Intuitive Surgical Inc. | 3.70% | 31,797 | $18.0M | Reduce -26.7% |
| EXAS Exact Sciences Corp. | 3.49% | 167,414 | $17.0M | Reduce -6.7% |
| EPD Enterprise Products Partners | 3.47% | 527,601 | $16.9M | Reduce -0.2% |
| BL Blackline Inc. | 3.17% | 279,398 | $15.4M | Add +0.2% |
| PROF Profound Medical Corp. | 3.14% | 1,944,061 | $15.3M | Add +12.2% |
| FRSH Freshworks Inc. Class A | 3.09% | 1,230,011 | $15.1M | Reduce -34.1% |
| NVGS Navigator Holdings Ltd. | 3.07% | 861,854 | $14.9M | Reduce -0.5% |
| EQIX Equinix Inc. | 2.70% | 17,142 | $13.1M | Reduce -0.6% |
| PCRX Pacira Biosciences Inc. | 2.66% | 501,211 | $13.0M | Add +11.4% |
| BLFS Biolife Solutions Inc. | 2.65% | 534,357 | $12.9M | Reduce -0.3% |
| FIVN FIVE9 Inc. | 2.58% | 625,726 | $12.5M | Add +109.0% |
| KMX Carmax Inc. | 2.54% | 320,077 | $12.4M | Add +41.9% |
| CAKE The Cheesecake Factory Inc. | 2.35% | 226,594 | $11.4M | Reduce -0.3% |
| CARG Cargurus Inc. | 2.13% | 270,822 | $10.4M | Reduce -0.6% |
| GNRC Generac Holdings Inc. | 2.12% | 75,593 | $10.3M | Reduce -2.5% |
| AMPL Amplitude Inc. Class A | 1.66% | 698,870 | $8.1M | Add +36.8% |
| HZO Marinemax Inc. | 1.60% | 322,053 | $7.8M | Add +23.2% |
| TMCI Treace Medical Concepts Inc. | 1.56% | 3,110,575 | $7.6M | Add +37.7% |
| VERX Vertex Inc. Class A | 1.50% | 364,643 | $7.3M | Reduce -3.7% |
| CMG Chipotle Mexican Grill Inc. | 1.19% | 156,975 | $5.8M | Add +30.4% |
| PRLB Proto Labs Inc. | 1.16% | 111,548 | $5.6M | Add +2.6% |
| DV Doubleverify Holdings Inc. | 1.15% | 491,664 | $5.6M | Reduce -27.7% |
| CELC Celcuity Inc. | 1.09% | 53,401 | $5.3M | Reduce -1.0% |
| CTRE Caretrust REIT Inc. | 0.99% | 133,071 | $4.8M | Reduce -1.9% |
| KLTR Kaltura Inc. | 0.96% | 2,861,365 | $4.7M | Reduce -0.8% |
| QDEL Quidelortho Corp. | 0.93% | 159,177 | $4.5M | Add +29.9% |
| AOSL Alpha & Omega Semiconductor | 0.88% | 215,642 | $4.3M | Add +0.1% |
| ICUI Icu Medical Inc. | 0.85% | 29,073 | $4.1M | Add +1.1% |
| PNTG The Pennant Group Inc. | 0.79% | 137,526 | $3.9M | Reduce -2.9% |
| NVDA Nvidia Corp. | 0.79% | 20,517 | $3.8M | Reduce -0.3% |
| OSUR Orasure Technologies Inc. | 0.78% | 1,569,782 | $3.8M | Reduce -1.6% |
| ASPN Aspen Aerogels Inc. | 0.66% | 1,133,248 | $3.2M | Reduce -35.4% |
| TPR Tapestry Inc. | 0.56% | 21,447 | $2.7M | Reduce -0.0% |
| PTEN Patterson-Uti Energy Inc. | 0.44% | 352,777 | $2.2M | Add +69.0% |
| CNF Cnfinance Holdings Ltd. | 0.39% | 316,853 | $1.9M | Reduce -0.1% |
| NCNO Ncino Inc. | 0.39% | 73,494 | $1.9M | Add +92.1% |
| MCHP Microchip Technology Inc. | 0.36% | 27,162 | $1.7M | Add +0.5% |
| GNL Global Net Lease Inc. | 0.30% | 170,510 | $1.5M | Reduce -12.0% |
| GNTX Gentex Corp. | 0.27% | 55,672 | $1.3M | Add +0.8% |
| SAM Boston Beer Company Inc. Class A | 0.25% | 6,355 | $1.2M | Reduce -70.5% |
| NTDOY Nintendo Co. Ltd.-Unspons ADR | 0.24% | 70,323 | $1.2M | Add +0.3% |
| SLG SL Green Realty Corp. | 0.24% | 25,838 | $1.2M | Reduce -0.6% |
| PFE Pfizer Inc. | 0.23% | 44,353 | $1.1M | Add +2.8% |
| FLG Flagstar Bank NA | 0.19% | 74,867 | $943K | Reduce -0.1% |
| XOM Exxon Mobil Corp. | 0.18% | 7,180 | $864K | Reduce -0.7% |
| T AT&T Inc. | 0.17% | 33,227 | $825K | Reduce -2.0% |
| GOOGL Alphabet Inc. Class A | 0.16% | 2,556 | $800K | No change |
| DVN Devon Energy Corp. | 0.14% | 19,111 | $700K | Reduce -5.8% |
| GOOG Alphabet Inc. Class C | 0.12% | 1,939 | $608K | Add +0.4% |
| SHOP Shopify Inc. Class A | 0.12% | 3,684 | $593K | Reduce -31.1% |
| GRSD Grandstand Ltd. filed as GAMBLING COM GROUP LIMITED | 0.12% | 105,569 | $576K | Add +357.8% |
| TECH Bio-Techne Corp. | 0.12% | 9,614 | $565K | No change |
| MTSI Macom Technology Solutions H | 0.12% | 3,295 | $564K | Add +4.9% |
| META Meta Platforms Inc. Class A | 0.11% | 839 | $554K | No change |
| MRVL Marvell Technology Inc. | 0.11% | 6,327 | $538K | No change |
| WEAV Weave Communications Inc. | 0.11% | 70,489 | $535K | Add +54.8% |
| SBUX Starbucks Corp. | 0.10% | 5,502 | $463K | Reduce -2.4% |
| HIMX Himax Technologies Inc.-ADR | 0.09% | 53,946 | $442K | Reduce -1.0% |
| VIAV Viavi Solutions Inc. | 0.09% | 23,992 | $428K | No change |
| APPS Digital Turbine Inc. | 0.08% | 81,839 | $409K | No change |
| CESDF Ces Energy Solutions Corp. | 0.08% | 45,700 | $409K | Reduce -0.8% |
| MRK Merck & Co. Inc. | 0.08% | 3,867 | $407K | Reduce -4.2% |
| PYPL PayPal Holdings Inc. | 0.08% | 6,596 | $385K | Add +0.2% |
| LTH Life Time Group Holdings Inc. | 0.07% | 13,538 | $360K | No change |
| ONTO Onto Innovation Inc. | 0.07% | 2,242 | $354K | No change |
| CGNX Cognex Corp. | 0.07% | 9,772 | $352K | No change |
| ETSY Etsy Inc. | 0.06% | 5,692 | $316K | Add +14.5% |
| CVLT Commvault Systems Inc. | 0.06% | 2,453 | $308K | Add +1.4% |
| MU Micron Technology Inc. | 0.06% | 1,077 | $307K | Reduce -63.3% |
| RNTX Rein Therapeutics Inc. | 0.06% | 240,220 | $279K | Add +5.0% |
| ATNM Actinium Pharmaceuticals Inc. | 0.06% | 201,807 | $274K | Reduce -10.8% |
| RMBS Rambus Inc. | 0.05% | 2,711 | $249K | No change |
| MSFT Microsoft Corp. | 0.05% | 508 | $246K | Add +0.4% |
| RNG Ringcentral Inc. Class A | 0.05% | 8,149 | $235K | Add +0.3% |
| BX Blackstone Inc. | 0.05% | 1,475 | $227K | New |
| AKAM Akamai Technologies Inc. | 0.05% | 2,520 | $220K | New |
| PETS Petmed Express Inc. | 0.03% | 42,328 | $135K | Add +77.5% |
| SVV Savers Value Village Inc. | 0.03% | 13,764 | $129K | No change |
| GDRX Goodrx Holdings Inc. Class A | 0.02% | 44,118 | $120K | Add +0.1% |
| RDHL Redhill Biopharma Ltd.-SP ADR | 0.02% | 86,102 | $89K | Add +383.1% |
| WCPRF Whitecap Resources Inc. | 0.00% | 486,122 | $4K | Reduce -0.1% |
Portfolio Sells Q3 2025 → Q4 2025
| ASPN Aspen Aerogels Inc. | Reduce -35.4% | 0.66% | −1.79 |
| FRSH Freshworks Inc. Class A | Reduce -34.1% | 3.09% | −1.31 |
| PSIX Power Solutions Internationa | Sold out | 0.00% | −1.28 |
| AL Sumisho Air Lease Corp. | Reduce -17.9% | 6.55% | −1.18 |
| AMRC Ameresco Inc. Class A | Reduce -3.1% | 5.01% | −0.78 |
| WCPRF Whitecap Resources Inc. | Reduce -0.1% | 0.00% | −0.74 |
| SAM Boston Beer Company Inc. Class A | Reduce -70.5% | 0.25% | −0.66 |
| GNRC Generac Holdings Inc. | Reduce -2.5% | 2.12% | −0.49 |
| DV Doubleverify Holdings Inc. | Reduce -27.7% | 1.15% | −0.48 |
| VERX Vertex Inc. Class A | Reduce -3.7% | 1.50% | −0.39 |
| OSUR Orasure Technologies Inc. | Reduce -1.6% | 0.78% | −0.25 |
| ISRG Intuitive Surgical Inc. | Reduce -26.7% | 3.70% | −0.19 |
| CAKE The Cheesecake Factory Inc. | Reduce -0.3% | 2.35% | −0.14 |
| BLZE Backblaze Inc. Class A | Sold out | 0.00% | −0.10 |
| BLFS Biolife Solutions Inc. | Reduce -0.3% | 2.65% | −0.09 |
| SLG SL Green Realty Corp. | Reduce -0.6% | 0.24% | −0.07 |
| SHOP Shopify Inc. Class A | Reduce -31.1% | 0.12% | −0.04 |
| MU Micron Technology Inc. | Reduce -63.3% | 0.06% | −0.04 |
| T AT&T Inc. | Reduce -2.0% | 0.17% | −0.02 |
| ATNM Actinium Pharmaceuticals Inc. | Reduce -10.8% | 0.06% | −0.02 |
| GNL Global Net Lease Inc. | Reduce -12.0% | 0.30% | −0.01 |
| EQIX Equinix Inc. | Reduce -0.6% | 2.70% | −0.01 |
| HIMX Himax Technologies Inc.-ADR | Reduce -1.0% | 0.09% | −0.01 |
| SBUX Starbucks Corp. | Reduce -2.4% | 0.10% | −0.00 |
| DVN Devon Energy Corp. | Reduce -5.8% | 0.14% | +0.00 |
| XOM Exxon Mobil Corp. | Reduce -0.7% | 0.18% | +0.01 |
| MRK Merck & Co. Inc. | Reduce -4.2% | 0.08% | +0.02 |
| NVDA Nvidia Corp. | Reduce -0.3% | 0.79% | +0.02 |
| FLG Flagstar Bank NA | Reduce -0.1% | 0.19% | +0.02 |
| CESDF Ces Energy Solutions Corp. | Reduce -0.8% | 0.08% | +0.02 |
| CTRE Caretrust REIT Inc. | Reduce -1.9% | 0.99% | +0.04 |
| TPR Tapestry Inc. | Reduce -0.0% | 0.56% | +0.08 |
| PNTG The Pennant Group Inc. | Reduce -2.9% | 0.79% | +0.08 |
| CARG Cargurus Inc. | Reduce -0.6% | 2.13% | +0.10 |
| ENSG The Ensign Group Inc. | Reduce -1.4% | 6.46% | +0.11 |
| CNF Cnfinance Holdings Ltd. | Reduce -0.1% | 0.39% | +0.13 |
| KLTR Kaltura Inc. | Reduce -0.8% | 0.96% | +0.13 |
| EPD Enterprise Products Partners | Reduce -0.2% | 3.47% | +0.16 |
| NVGS Navigator Holdings Ltd. | Reduce -0.5% | 3.07% | +0.37 |
| CELC Celcuity Inc. | Reduce -1.0% | 1.09% | +0.56 |
| WGS Genedx Holdings Corp. | Reduce -5.8% | 6.77% | +0.96 |
| EXAS Exact Sciences Corp. | Reduce -6.7% | 3.49% | +1.52 |
Portfolio Buys Q3 2025 → Q4 2025
| CDNA Caredx Inc. | Add +2.6% | 6.87% | +1.82 |
| PROF Profound Medical Corp. | Add +12.2% | 3.14% | +1.44 |
| FIVN FIVE9 Inc. | Add +109.0% | 2.58% | +1.12 |
| AMPL Amplitude Inc. Class A | Add +36.8% | 1.66% | +0.56 |
| KMX Carmax Inc. | Add +41.9% | 2.54% | +0.51 |
| PCRX Pacira Biosciences Inc. | Add +11.4% | 2.66% | +0.34 |
| HZO Marinemax Inc. | Add +23.2% | 1.60% | +0.27 |
| CMG Chipotle Mexican Grill Inc. | Add +30.4% | 1.19% | +0.25 |
| PTEN Patterson-Uti Energy Inc. | Add +69.0% | 0.44% | +0.23 |
| QDEL Quidelortho Corp. | Add +29.9% | 0.93% | +0.21 |
| BL Blackline Inc. | Add +0.2% | 3.17% | +0.20 |
| NCNO Ncino Inc. | Add +92.1% | 0.39% | +0.18 |
| ICUI Icu Medical Inc. | Add +1.1% | 0.85% | +0.16 |
| GRSD Grandstand Ltd. | Add +357.8% | 0.12% | +0.08 |
| PRLB Proto Labs Inc. | Add +2.6% | 1.16% | +0.07 |
| WEAV Weave Communications Inc. | Add +54.8% | 0.11% | +0.05 |
| BX Blackstone Inc. | New | 0.05% | +0.05 |
| AKAM Akamai Technologies Inc. | New | 0.05% | +0.05 |
| MTSI Macom Technology Solutions H | Add +4.9% | 0.12% | +0.04 |
| GOOG Alphabet Inc. Class C | Add +0.4% | 0.12% | +0.03 |
| PETS Petmed Express Inc. | Add +77.5% | 0.03% | +0.02 |
| RDHL Redhill Biopharma Ltd.-SP ADR | Add +383.1% | 0.02% | +0.01 |
| MCHP Microchip Technology Inc. | Add +0.5% | 0.36% | +0.01 |
| PFE Pfizer Inc. | Add +2.8% | 0.23% | +0.01 |
| RNTX Rein Therapeutics Inc. | Add +5.0% | 0.06% | +0.00 |
| RNG Ringcentral Inc. Class A | Add +0.3% | 0.05% | +0.00 |
| ETSY Etsy Inc. | Add +14.5% | 0.06% | −0.00 |
| MSFT Microsoft Corp. | Add +0.4% | 0.05% | −0.00 |
| PYPL PayPal Holdings Inc. | Add +0.2% | 0.08% | −0.01 |
| GDRX Goodrx Holdings Inc. Class A | Add +0.1% | 0.02% | −0.01 |
| CVLT Commvault Systems Inc. | Add +1.4% | 0.06% | −0.03 |
| GNTX Gentex Corp. | Add +0.8% | 0.27% | −0.05 |
| NTDOY Nintendo Co. Ltd.-Unspons ADR | Add +0.3% | 0.24% | −0.06 |
| AOSL Alpha & Omega Semiconductor | Add +0.1% | 0.88% | −0.33 |
| TMCI Treace Medical Concepts Inc. | Add +37.7% | 1.56% | −1.47 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 83 | $518.8M | CDNA, WGS, ENSG, AMRC, GNRC |
| Q1 2026 | 85 | $433.2M | ENSG, CDNA, AMRC, WGS, EPD |
| Q4 2025 | 86 | $487.0M | CDNA, WGS, AL, ENSG, AMRC |
| Q3 2025 | 86 | $498.5M | AL, ENSG, WGS, AMRC, CDNA |
| Q2 2025 | 87 | $492.4M | AL, ENSG, CDNA, ISRG, WGS |
| Q1 2025 | 98 | $454.5M | AL, ENSG, ISRG, CDNA, WGS |
| Q4 2024 | 91 | $496.3M | AL, ISRG, CDNA, ENSG, WGS |
| Q3 2024 | 102 | $504.4M | CDNA, ENSG, AL, ISRG, WGS |
| Q2 2024 | 97 | $444.0M | AL, CDNA, ENSG, ISRG, PCRX |
| Q1 2024 | 97 | $422.5M | AL, ENSG, CDNA, ISRG, PCRX |