Gagnon Securities LLC
In its 13F for Q2 2026 (holdings as of June 30, 2026, filed August 5, 2026), Gagnon Securities LLC reported 83 stock positions worth $518.8 million. Its top holding was Caredx (CDNA) at 9.7% of the portfolio, followed by Genedx (WGS, 6.9%) and Ensign (ENSG, 5.4%). Compared with Q1 2026, it opened 4 new positions, sold out of 6, added to 25 and reduced 46. The biggest buy was Caredx (CDNA, shares +1%) and the biggest sale an exit from Navigator (NVGS).
- Most Recent 13F
- Q2 2026
- Location
- New York, NY
- CIK
- 0001125725
- Portfolio Value
- $518.8M (Q2 2026)
- SEC Filing
- 0001019056-26-000123 ↗ filed Aug 5, 2026
Holdings Value
Holdings 83 stocks · $518.8M
| CDNA Caredx Inc. | 9.73% | 1,770,735 | $50.5M | Add +0.5% |
| WGS Genedx Holdings Corp. | 6.94% | 524,865 | $36.0M | Add +73.1% |
| ENSG The Ensign Group Inc. | 5.37% | 173,911 | $27.9M | Reduce -3.2% |
| AMRC Ameresco Inc. Class A | 4.40% | 826,562 | $22.8M | Reduce -1.6% |
| GNRC Generac Holdings Inc. | 4.13% | 73,170 | $21.4M | Reduce -2.3% |
| EPD Enterprise Products Partners | 3.62% | 510,576 | $18.8M | Reduce -0.7% |
| QDEL Quidelortho Corp. | 3.48% | 1,030,371 | $18.0M | Add +155.5% |
| CAKE The Cheesecake Factory Inc. | 3.40% | 221,792 | $17.6M | Reduce -1.4% |
| EQIX Equinix Inc. | 3.36% | 16,720 | $17.4M | Reduce -1.4% |
| KMX Carmax Inc. | 3.32% | 325,410 | $17.2M | Add +5.1% |
| FRSH Freshworks Inc. Class A | 3.05% | 1,563,866 | $15.8M | Reduce -9.7% |
| PCRX Pacira Biosciences Inc. | 2.98% | 608,617 | $15.4M | Reduce -1.4% |
| FIVN FIVE9 Inc. | 2.97% | 722,698 | $15.4M | Add +16.2% |
| HNGE Hinge Health Inc. Class A | 2.93% | 182,959 | $15.2M | Add +47.3% |
| BLFS Biolife Solutions Inc. | 2.92% | 535,906 | $15.1M | Reduce -0.1% |
| PROF Profound Medical Corp. | 2.51% | 1,960,074 | $13.0M | Add +0.8% |
| CARG Cargurus Inc. | 2.41% | 367,073 | $12.5M | Add +35.2% |
| TMCI Treace Medical Concepts Inc. | 2.32% | 3,029,543 | $12.1M | Reduce -41.8% |
| 0 | 2.25% | 765,179 | $11.7M | New |
| ISRG Intuitive Surgical Inc. | 2.23% | 29,144 | $11.6M | Reduce -7.8% |
| BL Blackline Inc. | 2.03% | 375,769 | $10.5M | Add +26.8% |
| ASPN Aspen Aerogels Inc. | 1.88% | 1,535,812 | $9.7M | Reduce -17.5% |
| PRLB Proto Labs Inc. | 1.83% | 116,283 | $9.5M | Add +4.9% |
| VERX Vertex Inc. Class A | 1.68% | 761,026 | $8.7M | Add +62.5% |
| AMPL Amplitude Inc. Class A | 1.56% | 1,055,508 | $8.1M | Reduce -0.4% |
| HZO Marinemax Inc. | 1.49% | 211,480 | $7.7M | Reduce -4.1% |
| OSUR Orasure Technologies Inc. | 1.37% | 1,592,147 | $7.1M | Reduce -7.1% |
| DV Doubleverify Holdings Inc. | 1.09% | 523,328 | $5.7M | Add +7.1% |
| CELC Celcuity Inc. | 1.07% | 53,240 | $5.6M | Reduce -0.2% |
| CMG Chipotle Mexican Grill Inc. | 1.02% | 155,463 | $5.3M | Reduce -1.5% |
| CTRE Caretrust REIT Inc. | 1.01% | 129,955 | $5.2M | Reduce -2.3% |
| PNTG The Pennant Group Inc. | 0.96% | 135,035 | $5.0M | Reduce -1.8% |
| WCPRF Whitecap Resources Inc. | 0.87% | 435,100 | $4.5M | Reduce -0.1% |
| ICUI Icu Medical Inc. | 0.83% | 29,400 | $4.3M | Reduce -1.1% |
| KLTR Kaltura Inc. | 0.82% | 3,266,999 | $4.2M | Reduce -0.4% |
| MCHP Microchip Technology Inc. | 0.46% | 26,229 | $2.4M | Reduce -2.3% |
| GNTX Gentex Corp. | 0.28% | 57,159 | $1.4M | Add +0.4% |
| GNL Global Net Lease Inc. | 0.28% | 160,598 | $1.4M | Reduce -5.6% |
| SLG SL Green Realty Corp. | 0.26% | 25,862 | $1.3M | No change |
| SAM Boston Beer Company Inc. Class A | 0.25% | 7,283 | $1.3M | Add +0.6% |
| NCNO Ncino Inc. | 0.24% | 75,333 | $1.2M | Reduce -5.3% |
| FLG Flagstar Bank NA | 0.21% | 74,456 | $1.1M | Reduce -0.3% |
| APPS Digital Turbine Inc. | 0.20% | 81,839 | $1.1M | No change |
| WEAV Weave Communications Inc. | 0.19% | 157,170 | $999K | Add +359.3% |
| DOCU Docusign Inc. | 0.18% | 20,906 | $929K | Reduce -1.5% |
| CNF Cnfinance Holdings Ltd. | 0.18% | 332,345 | $921K | Add +5.9% |
| GOOGL Alphabet Inc. Class A | 0.18% | 2,556 | $913K | No change |
| MRVL Marvell Technology Inc. | 0.17% | 2,923 | $871K | Reduce -57.2% |
| TECH Bio-Techne Corp. | 0.17% | 12,230 | $864K | Add +23.8% |
| DVN Devon Energy Corp. | 0.15% | 19,021 | $786K | Reduce -0.2% |
| MU Micron Technology Inc. | 0.15% | 679 | $784K | Reduce -37.0% |
| NTDOY Nintendo Co. Ltd.-Unspons ADR | 0.14% | 70,675 | $741K | Add +1.4% |
| CGNX Cognex Corp. | 0.14% | 9,798 | $710K | Add +0.2% |
| NVDA Nvidia Corp. | 0.13% | 3,498 | $700K | Reduce -4.3% |
| CVLT Commvault Systems Inc. | 0.13% | 4,874 | $691K | Add +11.4% |
| GOOG Alphabet Inc. Class C | 0.13% | 1,929 | $682K | Reduce -0.3% |
| ONTO Onto Innovation Inc. | 0.12% | 1,709 | $647K | Reduce -23.8% |
| T AT&T Inc. | 0.12% | 30,898 | $640K | Reduce -3.7% |
| HIMX Himax Technologies Inc.-ADR | 0.12% | 39,498 | $606K | Reduce -11.8% |
| PFE Pfizer Inc. | 0.11% | 23,346 | $562K | Reduce -47.3% |
| LTH Life Time Group Holdings Inc. | 0.11% | 13,465 | $550K | Reduce -0.6% |
| MTSI Macom Technology Solutions H | 0.09% | 1,281 | $487K | Reduce -65.1% |
| VIAV Viavi Solutions Inc. | 0.09% | 9,986 | $477K | Reduce -31.2% |
| META Meta Platforms Inc. Class A | 0.09% | 839 | $473K | No change |
| SHOP Shopify Inc. Class A | 0.09% | 4,023 | $459K | Add +2.3% |
| ETSY Etsy Inc. | 0.08% | 5,755 | $434K | Reduce -0.3% |
| SBUX Starbucks Corp. | 0.08% | 4,045 | $413K | Reduce -0.6% |
| MRK Merck & Co. Inc. | 0.08% | 3,187 | $410K | Reduce -0.2% |
| CESDF Ces Energy Solutions Corp. | 0.08% | 33,350 | $390K | No change |
| AKAM Akamai Technologies Inc. | 0.07% | 3,163 | $374K | Add +9.2% |
| WRBY Warby Parker Inc. Class A | 0.07% | 11,381 | $345K | New |
| RNG Ringcentral Inc. Class A | 0.06% | 8,517 | $332K | Add +1.1% |
| VCEL Vericel Corp. | 0.06% | 7,303 | $325K | New |
| BEYOND MEAT INC (BYND 0 03/15/27) | 0.06% | 381,271 | $286K | New |
| PL Planet Labs PBC | 0.05% | 8,352 | $277K | No change |
| ELVA Electrovaya Inc. | 0.05% | 26,307 | $276K | Add +0.2% |
| RNTX Rein Therapeutics Inc. | 0.05% | 229,070 | $238K | Reduce -4.4% |
| RMBS Rambus Inc. | 0.05% | 1,778 | $236K | Reduce -34.7% |
| BX Blackstone Inc. | 0.04% | 1,940 | $228K | No change |
| MSFT Microsoft Corp. | 0.04% | 556 | $207K | Add +2.0% |
| ATNM Actinium Pharmaceuticals Inc. | 0.03% | 182,142 | $178K | Reduce -9.5% |
| PTEN Patterson-Uti Energy Inc. | 0.03% | 17,420 | $160K | Reduce -94.5% |
| RDHL Redhill Biopharma Ltd.-SP ADR | 0.01% | 88,405 | $75K | No change |
Portfolio Sells Q1 2026 → Q2 2026
| NVGS Navigator Holdings Ltd. | Sold out | 0.00% | −3.96 |
| ENSG The Ensign Group Inc. | Reduce -3.2% | 5.37% | −2.98 |
| SGOV iShares 0-3 Month Treasury B | Sold out | 0.00% | −2.15 |
| ISRG Intuitive Surgical Inc. | Reduce -7.8% | 2.23% | −1.13 |
| EPD Enterprise Products Partners | Reduce -0.7% | 3.62% | −0.87 |
| AOSL Alpha & Omega Semiconductor | Sold out | 0.00% | −0.86 |
| PTEN Patterson-Uti Energy Inc. | Reduce -94.5% | 0.03% | −0.76 |
| AMRC Ameresco Inc. Class A | Reduce -1.6% | 4.40% | −0.55 |
| EQIX Equinix Inc. | Reduce -1.4% | 3.36% | −0.48 |
| CELC Celcuity Inc. | Reduce -0.2% | 1.07% | −0.33 |
| WCPRF Whitecap Resources Inc. | Reduce -0.1% | 0.87% | −0.26 |
| PCRX Pacira Biosciences Inc. | Reduce -1.4% | 2.98% | −0.25 |
| PFE Pfizer Inc. | Reduce -47.3% | 0.11% | −0.18 |
| FRSH Freshworks Inc. Class A | Reduce -9.7% | 3.05% | −0.16 |
| CMG Chipotle Mexican Grill Inc. | Reduce -1.5% | 1.02% | −0.15 |
| CTRE Caretrust REIT Inc. | Reduce -2.3% | 1.01% | −0.11 |
| AMPL Amplitude Inc. Class A | Reduce -0.4% | 1.56% | −0.11 |
| KLTR Kaltura Inc. | Reduce -0.4% | 0.82% | −0.10 |
| GRSD Grandstand Ltd. | Sold out | 0.00% | −0.10 |
| MTSI Macom Technology Solutions H | Reduce -65.1% | 0.09% | −0.09 |
| T AT&T Inc. | Reduce -3.7% | 0.12% | −0.09 |
| GNL Global Net Lease Inc. | Reduce -5.6% | 0.28% | −0.09 |
| DVN Devon Energy Corp. | Reduce -0.2% | 0.15% | −0.07 |
| EOG EOG Resources Inc. | Sold out | 0.00% | −0.06 |
| ICUI Icu Medical Inc. | Reduce -1.1% | 0.83% | −0.06 |
| DOCU Docusign Inc. | Reduce -1.5% | 0.18% | −0.05 |
| SVV Savers Value Village Inc. | Sold out | 0.00% | −0.04 |
| NCNO Ncino Inc. | Reduce -5.3% | 0.24% | −0.04 |
| RNTX Rein Therapeutics Inc. | Reduce -4.4% | 0.05% | −0.03 |
| VIAV Viavi Solutions Inc. | Reduce -31.2% | 0.09% | −0.02 |
| FLG Flagstar Bank NA | Reduce -0.3% | 0.21% | −0.01 |
| NVDA Nvidia Corp. | Reduce -4.3% | 0.13% | −0.01 |
| ATNM Actinium Pharmaceuticals Inc. | Reduce -9.5% | 0.03% | −0.01 |
| MRK Merck & Co. Inc. | Reduce -0.2% | 0.08% | −0.01 |
| RMBS Rambus Inc. | Reduce -34.7% | 0.05% | −0.01 |
| PNTG The Pennant Group Inc. | Reduce -1.8% | 0.96% | −0.01 |
| SBUX Starbucks Corp. | Reduce -0.6% | 0.08% | −0.00 |
| GOOG Alphabet Inc. Class C | Reduce -0.3% | 0.13% | +0.00 |
| MRVL Marvell Technology Inc. | Reduce -57.2% | 0.17% | +0.01 |
| ETSY Etsy Inc. | Reduce -0.3% | 0.08% | +0.02 |
| ONTO Onto Innovation Inc. | Reduce -23.8% | 0.12% | +0.02 |
| LTH Life Time Group Holdings Inc. | Reduce -0.6% | 0.11% | +0.02 |
| HIMX Himax Technologies Inc.-ADR | Reduce -11.8% | 0.12% | +0.04 |
| MCHP Microchip Technology Inc. | Reduce -2.3% | 0.46% | +0.06 |
| MU Micron Technology Inc. | Reduce -37.0% | 0.15% | +0.07 |
| HZO Marinemax Inc. | Reduce -4.1% | 1.49% | +0.11 |
| OSUR Orasure Technologies Inc. | Reduce -7.1% | 1.37% | +0.18 |
| ASPN Aspen Aerogels Inc. | Reduce -17.5% | 1.88% | +0.41 |
| BLFS Biolife Solutions Inc. | Reduce -0.1% | 2.92% | +0.55 |
| CAKE The Cheesecake Factory Inc. | Reduce -1.4% | 3.40% | +0.56 |
Portfolio Buys Q1 2026 → Q2 2026
| CDNA Caredx Inc. | Add +0.5% | 9.73% | +2.67 |
| WGS Genedx Holdings Corp. | Add +73.1% | 6.94% | +2.45 |
| 0 | New | 2.25% | +2.25 |
| QDEL Quidelortho Corp. | Add +155.5% | 3.48% | +1.95 |
| HNGE Hinge Health Inc. Class A | Add +47.3% | 2.93% | +1.82 |
| FIVN FIVE9 Inc. | Add +16.2% | 2.97% | +0.79 |
| VERX Vertex Inc. Class A | Add +62.5% | 1.68% | +0.40 |
| PRLB Proto Labs Inc. | Add +4.9% | 1.83% | +0.37 |
| KMX Carmax Inc. | Add +5.1% | 3.32% | +0.34 |
| CARG Cargurus Inc. | Add +35.2% | 2.41% | +0.28 |
| WEAV Weave Communications Inc. | Add +359.3% | 0.19% | +0.16 |
| WRBY Warby Parker Inc. Class A | New | 0.07% | +0.07 |
| VCEL Vericel Corp. | New | 0.06% | +0.06 |
| BEYOND MEAT INC (BYND 0 03/15/27) | New | 0.06% | +0.06 |
| CVLT Commvault Systems Inc. | Add +11.4% | 0.13% | +0.05 |
| TECH Bio-Techne Corp. | Add +23.8% | 0.17% | +0.05 |
| CGNX Cognex Corp. | Add +0.2% | 0.14% | +0.03 |
| DV Doubleverify Holdings Inc. | Add +7.1% | 1.09% | +0.02 |
| ELVA Electrovaya Inc. | Add +0.2% | 0.05% | +0.01 |
| AKAM Akamai Technologies Inc. | Add +9.2% | 0.07% | −0.00 |
| MSFT Microsoft Corp. | Add +2.0% | 0.04% | −0.01 |
| RNG Ringcentral Inc. Class A | Add +1.1% | 0.06% | −0.01 |
| GNTX Gentex Corp. | Add +0.4% | 0.28% | −0.01 |
| SHOP Shopify Inc. Class A | Add +2.3% | 0.09% | −0.02 |
| NTDOY Nintendo Co. Ltd.-Unspons ADR | Add +1.4% | 0.14% | −0.09 |
| CNF Cnfinance Holdings Ltd. | Add +5.9% | 0.18% | −0.11 |
| SAM Boston Beer Company Inc. Class A | Add +0.6% | 0.25% | −0.14 |
| PROF Profound Medical Corp. | Add +0.8% | 2.51% | −0.40 |
| BL Blackline Inc. | Add +26.8% | 2.03% | −0.50 |
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 |