# GAGNON SECURITIES LLC

> Institutional holdings reported to the SEC as of Q2 2026 on Form 13F. CIK 1125725. Source: https://holderbook.com/funds/1125725-gagnon-securities-llc/

- Reported value: $518.8M
- Positions: 83
- Weight of the ten largest: 47.7%
- Filed: 2026-08-05

A 13F reports long US equity positions only. Short positions, bonds, foreign listings, private holdings and cash are not visible, so this is not the manager's whole book.

## Holdings

| Security | Ticker | Value | Shares | Weight | Quarters held |
|---|---|---|---|---|---|
| CAREDX INC | [CDNA](https://holderbook.com/stocks/CDNA/) | $50.5M | 1,770,735 | 9.7% | 31 |
| GENEDX HOLDINGS CORP | [WGS](https://holderbook.com/stocks/WGS/) | $36.0M | 524,865 | 6.9% | 13 |
| ENSIGN GROUP INC | [ENSG](https://holderbook.com/stocks/ENSG/) | $27.9M | 173,911 | 5.4% | 31 |
| AMERESCO INC | [AMRC](https://holderbook.com/stocks/AMRC/) | $22.8M | 826,562 | 4.4% | 31 |
| GENERAC HLDGS INC | [GNRC](https://holderbook.com/stocks/GNRC/) | $21.4M | 73,170 | 4.1% | 31 |
| ENTERPRISE PRODS PARTNERS L | [EPD](https://holderbook.com/stocks/EPD/) | $18.8M | 510,576 | 3.6% | 31 |
| QUIDELORTHO CORP | [QDEL](https://holderbook.com/stocks/QDEL/) | $18.0M | 1,030,371 | 3.5% | 17 |
| CHEESECAKE FACTORY INC | [CAKE](https://holderbook.com/stocks/CAKE/) | $17.6M | 221,792 | 3.4% | 31 |
| EQUINIX INC | [EQIX](https://holderbook.com/stocks/EQIX/) | $17.4M | 16,720 | 3.4% | 31 |
| CARMAX INC | [KMX](https://holderbook.com/stocks/KMX/) | $17.2M | 325,410 | 3.3% | 31 |
| FRESHWORKS INC | [FRSH](https://holderbook.com/stocks/FRSH/) | $15.8M | 1,563,866 | 3.1% | 20 |
| PACIRA BIOSCIENCES INC | [PCRX](https://holderbook.com/stocks/PCRX/) | $15.4M | 608,617 | 3.0% | 29 |
| FIVE9 INC | [FIVN](https://holderbook.com/stocks/FIVN/) | $15.4M | 722,698 | 3.0% | 31 |
| HINGE HEALTH INC | [HNGE](https://holderbook.com/stocks/HNGE/) | $15.2M | 182,959 | 2.9% | 2 |
| BIOLIFE SOLUTIONS INC | [BLFS](https://holderbook.com/stocks/BLFS/) | $15.1M | 535,906 | 2.9% | 25 |
| PROFOUND MED CORP | [PROF](https://holderbook.com/stocks/PROF/) | $13.0M | 1,960,074 | 2.5% | 27 |
| CARGURUS INC | [CARG](https://holderbook.com/stocks/CARG/) | $12.5M | 367,073 | 2.4% | 16 |
| TREACE MED CONCEPTS INC | [TMCI](https://holderbook.com/stocks/TMCI/) | $12.1M | 3,029,543 | 2.3% | 9 |
|  | - | $11.7M | 765,179 | 2.3% | 1 |
| INTUITIVE SURGICAL INC | [ISRG](https://holderbook.com/stocks/ISRG/) | $11.6M | 29,144 | 2.2% | 31 |
| BLACKLINE INC | [BL](https://holderbook.com/stocks/BL/) | $10.5M | 375,769 | 2.0% | 31 |
| ASPEN AEROGELS INC | [ASPN](https://holderbook.com/stocks/ASPN/) | $9.7M | 1,535,812 | 1.9% | 5 |
| PROTO LABS INC | [PRLB](https://holderbook.com/stocks/PRLB/) | $9.5M | 116,283 | 1.8% | 30 |
| VERTEX INC | [VERX](https://holderbook.com/stocks/VERX/) | $8.7M | 761,026 | 1.7% | 11 |
| AMPLITUDE INC | [AMPL](https://holderbook.com/stocks/AMPL/) | $8.1M | 1,055,508 | 1.6% | 4 |
| MARINEMAX INC | [HZO](https://holderbook.com/stocks/HZO/) | $7.7M | 211,480 | 1.5% | 4 |
| ORASURE TECHNOLOGIES INC | [OSUR](https://holderbook.com/stocks/OSUR/) | $7.1M | 1,592,147 | 1.4% | 6 |
| DOUBLEVERIFY HLDGS INC | [DV](https://holderbook.com/stocks/DV/) | $5.7M | 523,328 | 1.1% | 11 |
| CELCUITY INC | [CELC](https://holderbook.com/stocks/CELC/) | $5.6M | 53,240 | 1.1% | 31 |
| CHIPOTLE MEXICAN GRILL INC | [CMG](https://holderbook.com/stocks/CMG/) | $5.3M | 155,463 | 1.0% | 31 |
| CARETRUST REIT INC | [CTRE](https://holderbook.com/stocks/CTRE/) | $5.2M | 129,955 | 1.0% | 31 |
| PENNANT GROUP INC | [PNTG](https://holderbook.com/stocks/PNTG/) | $5.0M | 135,035 | 1.0% | 27 |
| WHITECAP RESOURCES INC | [WCPRF](https://holderbook.com/stocks/WCPRF/) | $4.5M | 435,100 | 0.9% | 6 |
| ICU MED INC | [ICUI](https://holderbook.com/stocks/ICUI/) | $4.3M | 29,400 | 0.8% | 14 |
| KALTURA INC | [KLTR](https://holderbook.com/stocks/KLTR/) | $4.2M | 3,266,999 | 0.8% | 13 |
| MICROCHIP TECHNOLOGY INC. | [MCHP](https://holderbook.com/stocks/MCHP/) | $2.4M | 26,229 | 0.5% | 31 |
| GENTEX CORP | [GNTX](https://holderbook.com/stocks/GNTX/) | $1.4M | 57,159 | 0.3% | 31 |
| GLOBAL NET LEASE INC | [GNL](https://holderbook.com/stocks/GNL/) | $1.4M | 160,598 | 0.3% | 12 |
| SL GREEN RLTY CORP | [SLG](https://holderbook.com/stocks/SLG/) | $1.3M | 25,862 | 0.3% | 18 |
| BOSTON BEER INC | [SAM](https://holderbook.com/stocks/SAM/) | $1.3M | 7,283 | 0.2% | 17 |
| NCINO INC | [NCNO](https://holderbook.com/stocks/NCNO/) | $1.2M | 75,333 | 0.2% | 7 |
| FLAGSTAR BANK NATIONAL ASSOC | [FLG](https://holderbook.com/stocks/FLG/) | $1.1M | 74,456 | 0.2% | 9 |
| DIGITAL TURBINE INC | [APPS](https://holderbook.com/stocks/APPS/) | $1.1M | 81,839 | 0.2% | 14 |
| WEAVE COMMUNICATIONS INC | [WEAV](https://holderbook.com/stocks/WEAV/) | $998.7K | 157,170 | 0.2% | 7 |
| DOCUSIGN INC | [DOCU](https://holderbook.com/stocks/DOCU/) | $928.6K | 20,906 | 0.2% | 2 |
| CNFINANCE HLDGS LTD | [CNF](https://holderbook.com/stocks/CNF/) | $920.6K | 332,345 | 0.2% | 4 |
| ALPHABET INC | [GOOGL](https://holderbook.com/stocks/GOOGL/) | $913.4K | 2,556 | 0.2% | 22 |
| MARVELL TECHNOLOGY INC | [MRVL](https://holderbook.com/stocks/MRVL/) | $870.7K | 2,923 | 0.2% | 22 |
| BIO-TECHNE CORP | [TECH](https://holderbook.com/stocks/TECH/) | $864.0K | 12,230 | 0.2% | 12 |
| DEVON ENERGY CORP NEW | [DVN](https://holderbook.com/stocks/DVN/) | $785.9K | 19,021 | 0.2% | 22 |
| MICRON TECHNOLOGY INC | [MU](https://holderbook.com/stocks/MU/) | $783.8K | 679 | 0.2% | 14 |
| Nintendo Co Ltd | [NTDOY](https://holderbook.com/stocks/NTDOY/) | $740.7K | 70,675 | 0.1% | 31 |
| COGNEX CORP | [CGNX](https://holderbook.com/stocks/CGNX/) | $709.6K | 9,798 | 0.1% | 10 |
| NVIDIA CORPORATION | [NVDA](https://holderbook.com/stocks/NVDA/) | $699.9K | 3,498 | 0.1% | 13 |
| COMMVAULT SYS INC | [CVLT](https://holderbook.com/stocks/CVLT/) | $690.8K | 4,874 | 0.1% | 15 |
| ALPHABET INC | [GOOG](https://holderbook.com/stocks/GOOG/) | $681.6K | 1,929 | 0.1% | 4 |
| ONTO INNOVATION INC | [ONTO](https://holderbook.com/stocks/ONTO/) | $646.8K | 1,709 | 0.1% | 4 |
| AT&T INC | [T](https://holderbook.com/stocks/T/) | $639.6K | 30,898 | 0.1% | 31 |
| HIMAX TECHNOLOGIES INC | [HIMX](https://holderbook.com/stocks/HIMX/) | $605.9K | 39,498 | 0.1% | 10 |
| PFIZER INC | [PFE](https://holderbook.com/stocks/PFE/) | $562.2K | 23,346 | 0.1% | 31 |
| LIFE TIME GROUP HOLDINGS INC | [LTH](https://holderbook.com/stocks/LTH/) | $549.9K | 13,465 | 0.1% | 12 |
| MACOM TECH SOLUTIONS HLDGS I | [MTSI](https://holderbook.com/stocks/MTSI/) | $487.3K | 1,281 | 0.1% | 4 |
| VIAVI SOLUTIONS INC | [VIAV](https://holderbook.com/stocks/VIAV/) | $476.8K | 9,986 | 0.1% | 26 |
| META PLATFORMS INC | [META](https://holderbook.com/stocks/META/) | $472.6K | 839 | 0.1% | 14 |
| SHOPIFY INC | [SHOP](https://holderbook.com/stocks/SHOP/) | $459.3K | 4,023 | 0.1% | 16 |
| ETSY INC | [ETSY](https://holderbook.com/stocks/ETSY/) | $433.5K | 5,755 | 0.1% | 11 |
| STARBUCKS CORP | [SBUX](https://holderbook.com/stocks/SBUX/) | $413.4K | 4,045 | 0.1% | 17 |
| MERCK & CO INC | [MRK](https://holderbook.com/stocks/MRK/) | $409.5K | 3,187 | 0.1% | 24 |
| CES ENERGY SOLUTIONS CORP | - | $389.5K | 33,350 | 0.1% | 31 |
| AKAMAI TECHNOLOGIES INC | [AKAM](https://holderbook.com/stocks/AKAM/) | $373.9K | 3,163 | 0.1% | 3 |
| WARBY PARKER INC | [WRBY](https://holderbook.com/stocks/WRBY/) | $345.3K | 11,381 | 0.1% | 1 |
| RINGCENTRAL INC | [RNG](https://holderbook.com/stocks/RNG/) | $332.0K | 8,517 | 0.1% | 11 |
| VERICEL CORP | [VCEL](https://holderbook.com/stocks/VCEL/) | $324.9K | 7,303 | 0.1% | 1 |
| BEYOND MEAT INC | - | $286.0K | 381,271 | 0.1% | 1 |
| PLANET LABS PBC | [PL](https://holderbook.com/stocks/PL/) | $276.7K | 8,352 | 0.1% | 2 |
| ELECTROVAYA INC | [ELVA](https://holderbook.com/stocks/ELVA/) | $276.2K | 26,307 | 0.1% | 2 |
| REIN THERAPEUTICS INC | [RNTX](https://holderbook.com/stocks/RNTX/) | $238.2K | 229,070 | 0.0% | 11 |
| RAMBUS INC DEL | [RMBS](https://holderbook.com/stocks/RMBS/) | $236.0K | 1,778 | 0.0% | 4 |
| BLACKSTONE INC | [BX](https://holderbook.com/stocks/BX/) | $228.3K | 1,940 | 0.0% | 3 |
| MICROSOFT CORP | [MSFT](https://holderbook.com/stocks/MSFT/) | $207.4K | 556 | 0.0% | 16 |
| ACTINIUM PHARMACEUTICALS INC | [ATNM](https://holderbook.com/stocks/ATNM/) | $178.5K | 182,142 | 0.0% | 6 |
| PATTERSON-UTI ENERGY INC | [PTEN](https://holderbook.com/stocks/PTEN/) | $159.9K | 17,420 | 0.0% | 12 |
| REDHILL BIOPHARMA LTD | [RDHL](https://holderbook.com/stocks/RDHL/) | $74.7K | 88,405 | 0.0% | 4 |

## What the disclosed book did

Not the fund's return. This is the change in value of the positions disclosed on Form 13F, had they been left untouched, against SPY over the same quarter ends.

| Quarter | Book | Market | Difference | Priced |
|---|---|---|---|---|
| Q2 2026 | +20.3% | +14.8% | +5.4% | 99% |
| Q1 2026 | -7.4% | -4.6% | -2.8% | 99% |
| Q4 2025 | +1.1% | +2.4% | -1.2% | 99% |
| Q3 2025 | +4.9% | +7.8% | -2.9% | 99% |
| Q2 2025 | +12.6% | +10.5% | +2.2% | 98% |
| Q1 2025 | -9.9% | -4.6% | -5.4% | 100% |
| Q4 2024 | +5.0% | +2.1% | +2.9% | 96% |
| Q3 2024 | +14.0% | +5.4% | +8.6% | 98% |

## Quarter by quarter

| Quarter | Value | Positions |
|---|---|---|
| Q2 2026 | $518.8M | 83 |
| Q1 2026 | $433.2M | 85 |
| Q4 2025 | $491.1M | 86 |
| Q3 2025 | $498.5M | 86 |
| Q2 2025 | $492.4M | 87 |
| Q1 2025 | $454.5M | 98 |
| Q4 2024 | $496.3M | 91 |
| Q3 2024 | $504.4M | 102 |
| Q2 2024 | $444.0M | 97 |
| Q1 2024 | $422.5M | 98 |
| Q4 2023 | $416.6M | 102 |
| Q3 2023 | $399.1M | 97 |