Investor
GAGNON SECURITIES LLC
CIK 0001125725 · filed 2026-04-22 · SEC filing
13F book
$433.2M
Positions
85
6 new · 7 sold
Largest name
8.4%
Ensign Group, Inc · ENSG
Est. mark
−$36.8M
Price effect on 79 names still held. Flow −$21.1M.
| Name | Ticker | Shares | Value | Weight | Est. mark | Change |
|---|---|---|---|---|---|---|
| Ensign Group, Inc | ENSG | 179.7K | $36.2M | 8.4% | $4.91M | Cut$4.75M |
| CareDx, Inc. | CDNA | 1.76M | $30.6M | 7.1% | −$2.61M | Cut−$2.85M |
| Ameresco, Inc. | AMRC | 840.1K | $21.4M | 4.9% | −$3.16M | Added−$2.97M |
| GeneDx Holdings Corp. | WGS | 303.1K | $19.5M | 4.5% | −$16.7M | Added−$13.5M |
| Enterprise Prods Partners L | — | 514.3K | $19.5M | 4.5% | $2.97M | Cut$2.54M |
| Navigator Hldgs Ltd | — | 886.6K | $17.1M | 4.0% | $1.73M | Added$2.21M |
| Equinix Inc | EQIX | 17K | $16.6M | 3.8% | $3.63M | Cut$3.48M |
| Generac Hldgs Inc | — | 74.9K | $14.6M | 3.4% | $4.42M | Cut$4.32M |
| Intuitive Surgical Inc | ISRG | 31.6K | $14.6M | 3.4% | −$3.33M | Cut−$3.43M |
| Pacira BioSciences, Inc. | PCRX | 617.5K | $14M | 3.2% | −$1.64M | Added$984.4K |
| Freshworks Inc. | FRSH | 1.73M | $13.9M | 3.2% | −$5.19M | Added−$1.16M |
| Carmax Inc | KMX | 309.7K | $12.9M | 3.0% | $910.5K | Cut$509.5K |
| Profound Med Corp | — | 1.94M | $12.6M | 2.9% | −$2.7M | Added−$2.7M |
| Cheesecake Factory Inc | CAKE | 225K | $12.3M | 2.8% | $961K | Cut$882.9K |
| Blackline, Inc. | BL | 296.4K | $11M | 2.5% | −$5.11M | Added−$4.48M |
| Biolife Solutions Inc | BLFS | 536.5K | $10.2M | 2.4% | −$2.73M | Added−$2.68M |
| Five9, Inc. | FIVN | 622.1K | $9.44M | 2.2% | −$3.04M | Cut−$3.11M |
| Ishares 0-3 Month | — | 92.7K | $9.33M | 2.2% | — | New |
| CarGurus, Inc. | CARG | 271.5K | $9.25M | 2.1% | −$1.16M | Added−$1.14M |
| Amplitude, Inc. | AMPL | 1.06M | $7.23M | 1.7% | −$3.33M | Added−$864.8K |
| Treace Med Concepts Inc | — | 5.2M | $6.97M | 1.6% | −$3.45M | Added−$650.4K |
| Quidelortho Corp | QDEL | 403.3K | $6.63M | 1.5% | −$1.93M | Added$2.08M |
| Aspen Aerogels Inc | ASPN | 1.86M | $6.37M | 1.5% | $668.6K | Added$3.16M |
| Proto Labs Inc | PRLB | 110.9K | $6.32M | 1.5% | $713K | Cut$679.7K |
| Celcuity Inc. | CELC | 53.3K | $6.09M | 1.4% | $768.1K | Cut$762.2K |
| Marinemax Inc | HZO | 220.6K | $5.97M | 1.4% | $624.3K | Cut−$1.83M |
| Vertex, Inc. | VERX | 468.2K | $5.57M | 1.3% | −$2.95M | Added−$1.71M |
| Orasure Technologies Inc | OSUR | 1.71M | $5.14M | 1.2% | $910.5K | Added$1.34M |
| Chipotle Mexican Grill Inc | CMG | 157.8K | $5.05M | 1.2% | −$783.3K | Added−$755.3K |
| Whitecap Res Inc | — | 435.4K | $4.9M | 1.1% | $1.25M | Cut$820.1K |
| CareTrust REIT, Inc. | CTRE | 133K | $4.88M | 1.1% | $65.2K | Cut$64.3K |
| Hinge Health, Inc. | HNGE | 124.3K | $4.79M | 1.1% | — | New |
| Doubleverify Hldgs Inc | — | 488.5K | $4.64M | 1.1% | −$947.6K | Cut−$984.2K |
| Pennant Group, Inc. | PNTG | 137.5K | $4.19M | 1.0% | $320.3K | Cut$319.2K |
| Kaltura Inc | KLTR | 3.28M | $4M | 0.9% | −$1.2M | Added−$692.3K |
| Icu Med Inc | — | 29.7K | $3.84M | 0.9% | −$393.1K | Added−$306.5K |
| ALPHA & OMEGA SEMICONDUCTOR Ltd | AOSL | 167.9K | $3.72M | 0.9% | $394.5K | Cut−$551.8K |
| Patterson Uti Energy Inc | PTEN | 314.6K | $3.41M | 0.8% | $1.49M | Cut$1.25M |
| Microchip Technology Inc. | — | 26.8K | $1.73M | 0.4% | $23.9K | Cut$3.24K |
| Boston Beer Co Inc | SAM | 7.24K | $1.67M | 0.4% | $224.1K | Added$427.8K |
| Global Net Lease Inc | — | 170.1K | $1.59M | 0.4% | $129.3K | Cut$126K |
| Gentex Corp | GNTX | 56.9K | $1.24M | 0.3% | −$79.1K | Added−$51.5K |
| Pfizer Inc | PFE | 44.3K | $1.24M | 0.3% | $140.7K | Cut$138.4K |
| Cnfinance Hldgs Ltd | — | 313.9K | $1.23M | 0.3% | −$671.8K | Cut−$689.5K |
| nCino, Inc. | NCNO | 79.5K | $1.19M | 0.3% | −$783.4K | Added−$693.2K |
| Docusign, Inc. | DOCU | 21.2K | $1.01M | 0.2% | — | New |
| Nintendo Ltd Adr | — | 69.7K | $996K | 0.2% | −$179.1K | Cut−$189.7K |
| Flagstar Bank National Assoc | — | 74.7K | $983.9K | 0.2% | $43.3K | Cut$41.4K |
| Devon Energy Corp New | — | 19.1K | $959.4K | 0.2% | $261K | Cut$259.4K |
| Sl Green Rlty Corp | — | 25.9K | $955.3K | 0.2% | −$230.7K | Added−$229.8K |
| At&T Inc | — | 32.1K | $930.4K | 0.2% | $133.2K | Cut$105K |
| Macom Tech Solutions Hldgs I | — | 3.67K | $815K | 0.2% | $167.4K | Added$250.6K |
| Alphabet Inc | — | 2.56K | $735K | 0.2% | −$65K | Held |
| Marvell Technology, Inc. | MRVL | 6.83K | $676K | 0.2% | $89K | Added$138.3K |
| Nvidia Corp | NVDA | 3.65K | $637.4K | 0.1% | −$44.2K | Cut−$3.19M |
| Alphabet Inc | — | 1.93K | $554.8K | 0.1% | −$52.1K | Cut−$53.7K |
| Bio-Techne Corp | TECH | 9.88K | $516.3K | 0.1% | −$63K | Added−$49.1K |
| Viavi Solutions Inc. | VIAV | 14.5K | $482.9K | 0.1% | $224.3K | Cut$55.4K |
| Meta Platforms, Inc. | META | 839 | $480K | 0.1% | −$73.8K | Held |
| Cognex Corp | CGNX | 9.78K | $479.1K | 0.1% | $127.1K | Added$127.5K |
| Shopify Inc. | SHOP | 3.93K | $466.4K | 0.1% | −$156K | Added−$126.6K |
| Onto Innovation Inc. | ONTO | 2.24K | $459.8K | 0.1% | $105.8K | Held |
| Ces Energy Solutions C F | — | 33.4K | $440K | 0.1% | $141.4K | Cut$30.9K |
| Gambling Com Group Limited | — | 109.7K | $425.6K | 0.1% | −$166.8K | Added−$150.8K |
| Merck & Co., Inc. | MRK | 3.19K | $384K | 0.1% | $48K | Cut−$23.1K |
| Life Time Group Holdings, Inc. | LTH | 13.6K | $365K | 0.1% | $4.87K | Added$5.2K |
| Starbucks Corp | SBUX | 4.07K | $364.7K | 0.1% | $21.9K | Cut−$98.6K |
| Micron Technology Inc | MU | 1.08K | $363.9K | 0.1% | $56.5K | Held |
| Himax Technologies, Inc. | HIMX | 44.8K | $352.4K | 0.1% | −$14.3K | Cut−$89.5K |
| Commvault Sys Inc | — | 4.38K | $340.8K | 0.1% | −$116.4K | Added$33.3K |
| Akamai Technologies Inc | AKAM | 2.9K | $332.6K | 0.1% | $69.6K | Added$112.7K |
| RingCentral, Inc. | RNG | 8.42K | $313.2K | 0.1% | $67.7K | Added$77.9K |
| Rein Therapeutics, Inc. | RNTX | 239.5K | $311.4K | 0.1% | $33.5K | Cut$32.7K |
| Etsy Inc | ETSY | 5.77K | $288.5K | 0.1% | −$31.1K | Added−$27K |
| Eog Res Inc | — | 1.85K | $267.6K | 0.1% | — | New |
| Digital Turbine, Inc. | APPS | 81.8K | $235.7K | 0.1% | −$173.5K | Held |
| Rambus Inc Del | — | 2.72K | $234.2K | 0.1% | −$15.9K | Added−$14.9K |
| Planet Labs Pbc | PL | 8.35K | $233.4K | 0.1% | — | New |
| Blackstone Inc. | BX | 1.94K | $223.1K | 0.1% | −$57.7K | Added−$4.28K |
| Electrovaya Inc. | ELVA | 26.3K | $205.3K | 0.0% | — | New |
| Microsoft Corp | MSFT | 545 | $201.7K | 0.0% | −$57.6K | Added−$43.9K |
| Actinium Pharmaceuticals, Inc. | ATNM | 201.3K | $200.4K | 0.0% | −$73.4K | Cut−$74.1K |
| Savers Value Vlg Inc | — | 25.1K | $187.1K | 0.0% | −$26.2K | Added$58.5K |
| Weave Communications, Inc. | WEAV | 34.2K | $158.1K | 0.0% | −$101.6K | Cut−$376.9K |
| RedHill Biopharma Ltd. | RDHL | 88.4K | $65.9K | 0.0% | −$24.5K | Added−$22.8K |
Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.