Gagnon Securities LLC holds a focused book of 83 stocks worth $518.8M as of Q2 2026 (disclosed Aug 5, 2026, a ~36-day 13F lag). This quarter they opened Gambling Com Group and trimmed Ensign Group Inc. Their largest long position is Caredx Inc at 10% of the equity book.
Top-heavy: focused book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
97% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Other tracked managers holding the same core names as Gagnon Securities LLC
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| UBS Group AG | 75 / 80 | $56.9B |
| BlackRock, Inc. | 74 / 80 | $1.1T |
| MORGAN STANLEY | 74 / 80 | $219.2B |
| WELLS FARGO & COMPANY/MN | 74 / 80 | $48.3B |
| OSAIC HOLDINGS, INC. | 74 / 80 | $4.7B |
| GEODE CAPITAL MANAGEMENT, LLC | 73 / 80 | $327.1B |
| GOLDMAN SACHS GROUP INC | 73 / 80 | $110.9B |
| ROYAL BANK OF CANADA | 73 / 80 | $62.3B |
Ranked by how many of Gagnon Securities LLC's top 80 disclosed names each fund also holds: a cross-fund conviction signal from the latest 13F of every tracked manager.
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Caredx Inc COM | $50.5M | 1.77M | 9.7% | ▲+0.5% Added · +9K sh | |
| 2 | Genedx Holdings Corp COM CL A | $36.0M | 524.9K | 6.9% | ▲+73% Added · +222K sh | |
| 3 | Ensign Group Inc COM | $27.9M | 173.9K | 5.4% | ▼−3.2% Reduced · −6K sh | |
| 4 | Ameresco Inc CL A | $22.8M | 826.6K | 4.4% | ▼−1.6% Reduced · −14K sh | |
| 5 | Generac Hldgs Inc COM | $21.4M | 73.2K | 4.1% | ▼−2.3% Reduced · −2K sh | |
| 6 | Enterprise Prods Partners L P COM | $18.8M | 510.6K | 3.6% | ▼−0.7% Reduced · −4K sh | |
| 7 | Quidelortho Corp COM NEW | $18.0M | 1.03M | 3.5% | ▲+155% Added · +627K sh | |
| 8 | Cheesecake Factory Inc COM | $17.6M | 221.8K | 3.4% | ▼−1.4% Reduced · −3K sh | |
| 9 | Equinix Inc COM | $17.4M | 16.7K | 3.4% | ▼−1.4% Reduced · −231 sh | |
| 10 | Carmax Inc COM | $17.2M | 325.4K | 3.3% | ▲+5.1% Added · +16K sh | |
| 11 | Freshworks Inc CLASS A COM | $15.8M | 1.56M | 3.1% | ▼−9.7% Reduced · −168K sh | |
| 12 | Pacira Biosciences Inc COM | $15.4M | 608.6K | 3.0% | ▼−1.4% Reduced · −9K sh | |
| 13 | Five9 Inc COM | $15.4M | 722.7K | 3.0% | ▲+16% Added · +101K sh | |
| 14 | Hinge Health Inc CL A | $15.2M | 183.0K | 2.9% | ▲+47% Added · +59K sh | |
| 15 | Biolife Solutions Inc COM NEW | $15.1M | 535.9K | 2.9% | ▼−0.1% Reduced · −606 sh | |
| 16 | Profound Med Corp COM | $13.0M | 1.96M | 2.5% | ▲+0.8% Added · +16K sh | |
| 17 | Cargurus Inc COM CL A | $12.5M | 367.1K | 2.4% | ▲+35% Added · +96K sh | |
| 18 | Treace Med Concepts Inc COM | $12.1M | 3.03M | 2.3% | ▼−42% Reduced · −2.2M sh | |
| 19 | Navigator Hldgs Ltd COM | $11.7M | 765.2K | 2.3% | ▲New New position | |
| 20 | Intuitive Surgical Inc COM NEW | $11.6M | 29.1K | 2.2% | ▼−7.8% Reduced · −2K sh | |
| 21 | Blackline Inc COM | $10.5M | 375.8K | 2.0% | ▲+27% Added · +79K sh | |
| 22 | Aspen Aerogels Inc COM | $9.7M | 1.54M | 1.9% | ▼−18% Reduced · −326K sh | |
| 23 | Proto Labs Inc SPON ADS NEW | $9.5M | 116.3K | 1.8% | ▲+4.9% Added · +5K sh | |
| 24 | Vertex Inc CL A | $8.7M | 761.0K | 1.7% | ▲+63% Added · +293K sh | |
| 25 | Amplitude Inc COM CL A | $8.1M | 1.06M | 1.6% | ▼−0.4% Reduced · −4K sh | |
| 26 | MarineMax Inc COM | $7.7M | 211.5K | 1.5% | ▼−4.1% Reduced · −9K sh | |
| 27 | OraSure Technologies Inc COM | $7.1M | 1.59M | 1.4% | ▼−7.1% Reduced · −122K sh | |
| 28 | Doubleverify Hldgs Inc COM | $5.7M | 523.3K | 1.1% | ▲+7.1% Added · +35K sh | |
| 29 | Celcuity Inc COM | $5.6M | 53.2K | 1.1% | ▼−0.2% Reduced · −102 sh | |
| 30 | Chipotle Mexican Grill Inc COM | $5.3M | 155.5K | 1.0% | ▼−1.5% Reduced · −2K sh | |
| 31 | Caretrust REIT Inc COM | $5.2M | 130.0K | 1.0% | ▼−2.3% Reduced · −3K sh | |
| 32 | Pennant Group Inc COM | $5.0M | 135.0K | 1.0% | ▼−1.8% Reduced · −2K sh | |
| 33 | Whitecap Res Inc COM NEW | $4.5M | 435.1K | 0.9% | ▼−0.1% Reduced · −318 sh | |
| 34 | Icu Med Inc COM | $4.3M | 29.4K | 0.8% | ▼−1.1% Reduced · −343 sh | |
| 35 | Kaltura Inc COM | $4.2M | 3.27M | 0.8% | ▼−0.4% Reduced · −12K sh | |
| 36 | Microchip Technology Inc. COM | $2.4M | 26.2K | 0.5% | ▼−2.3% Reduced · −609 sh | |
| 37 | Gentex Corp COM | $1.4M | 57.2K | 0.3% | ▲+0.4% Added · +226 sh | |
| 38 | Global Net Lease Inc COM NEW | $1.4M | 160.6K | 0.3% | ▼−5.6% Reduced · −10K sh | |
| 39 | SL Green Rlty Corp COM | $1.3M | 25.9K | 0.3% | —Held | |
| 40 | Boston Beer Inc CL A | $1.3M | 7.3K | 0.2% | ▲+0.6% Added · +44 sh | |
| 41 | Ncino Inc SPONSORED ADS | $1.2M | 75.3K | 0.2% | ▼−5.3% Reduced · −4K sh | |
| 42 | Flagstar Bank National Associa COM NEW | $1.1M | 74.5K | 0.2% | ▼−0.3% Reduced · −255 sh | |
| 43 | Digital Turbine Inc COM NEW | $1.1M | 81.8K | 0.2% | —Held | |
| 44 | Webull Corp ORD SHS | $999K | 157.2K | 0.2% | ▲+359% Added · +123K sh | |
| 45 | Docusign Inc COM | $929K | 20.9K | 0.2% | ▼−1.5% Reduced · −326 sh | |
| 46 | Cnfinance Hldgs Ltd SPON ADS | $921K | 332.3K | 0.2% | ▲+5.9% Added · +18K sh | |
| 47 | Alphabet Inc CAP STK CL A | $913K | 2.6K | 0.2% | —Held | |
| 48 | Marvell Technology Inc ORD | $871K | 2.9K | 0.2% | ▼−57% Reduced · −4K sh | |
| 49 | Bio-Techne Corp COM | $864K | 12.2K | 0.2% | ▲+24% Added · +2K sh | |
| 50 | Devon Energy Corp COM | $786K | 19.0K | 0.2% | ▼−0.2% Reduced · −45 sh |
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1125725/holdings"
Use Arkolith to show GAGNON SECURITIES LLC's latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.