Funds › Gagnon Securities LLC
Gagnon Securities LLC
13F for Q3 2026, filed Nov 5, 2026. 84 positions worth $576.5M.Managers with more than $100 million in US-listed stocks list their holdings each quarter, within 45 days of quarter end. Long positions only: no short sales or cash.
Latest report
Q3 2026
filed Nov 5, 2026
Reported value
$576.5M
+$57.7M (11.1%) vs Q2 2026
Positions
84
83 in Q2 2026
Top 10 share
47.3%
of reported value
CheckedEach line's price per share is checked against other managers' reports of the same stock. Unit mix-ups are corrected. Reports no fix can rescue are left out.
Clean
prices match other managers' reports
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Holdings, Q3 2026
Largest first. Common shares only; puts and calls are under All positions.
| # | The fund's own figures at the end of the quarter. A report can be up to 45 days old when it is filed. Options and bonds are not counted here. | Filing | ||||
|---|---|---|---|---|---|---|
| 1 | CDNA CareDx, Inc. | 1.07M | $69.8M | 12.1% | -39.3% | 13F ↗ |
| 2 | WGS GeneDx Holdings Corp. | 516,284 | $37.3M | 6.5% | -1.6% | 13F ↗ |
| 3 | ENSG The Ensign Group, Inc. | 163,342 | $28.1M | 4.9% | -6.1% | 13F ↗ |
| 4 | CAKE The Cheesecake Factory Incorporated | 215,886 | $22.7M | 3.9% | -2.7% | 13F ↗ |
| 5 | Biolife Solutions Inc | 532,097 | $20.7M | 3.6% | -0.7% | 13F ↗ |
| 6 | FRSH Freshworks Inc. | 1.56M | $20.0M | 3.5% | -0.1% | 13F ↗ |
| 7 | FIVN Five9, Inc. | 566,846 | $19.3M | 3.3% | -21.6% | 13F ↗ |
| 8 | AMRC Ameresco, Inc. | 896,427 | $18.6M | 3.2% | +8.5% | 13F ↗ |
| 9 | EPD Enterprise Products Partners L.P. | 508,977 | $18.1M | 3.1% | -0.3% | 13F ↗ |
| 10 | KMX CarMax Inc | 326,277 | $18.0M | 3.1% | +0.3% | 13F ↗ |
| 11 | HNGE Hinge Health, Inc. | 180,163 | $17.5M | 3.0% | -1.5% | 13F ↗ |
| 12 | EQIX Equinix, Inc. | 16,450 | $16.6M | 2.9% | -1.6% | 13F ↗ |
| 13 | GNRC Generac Holdlings Inc. | 76,684 | $15.9M | 2.8% | +4.8% | 13F ↗ |
| 14 | PCRX Pacira BioSciences, Inc. | 624,805 | $15.7M | 2.7% | +2.7% | 13F ↗ |
| 15 | TMCI Treace Medical Concepts, Inc. | 3.42M | $15.2M | 2.6% | +12.8% | 13F ↗ |
| 16 | AMPL Amplitude, Inc. | 1.03M | $14.2M | 2.5% | -2.7% | 13F ↗ |
| 17 | NVGS Navigator Holdings Ltd. | 607,557 | $14.1M | 2.4% | New | 13F ↗ |
| 18 | BL BlackLine, Inc. | 520,030 | $13.8M | 2.4% | +38.4% | 13F ↗ |
| 19 | QDEL QuidelOrtho Corporation | 1.30M | $13.7M | 2.4% | +26.0% | 13F ↗ |
| 20 | VERX Vertex, Inc. | 1.05M | $12.3M | 2.1% | +37.3% | 13F ↗ |
| 21 | PROF Profound Medical Corp. | 2.05M | $11.9M | 2.1% | +4.6% | 13F ↗ |
| 22 | ISRG Intuitive Surgical, Inc. | 29,144 | $11.9M | 2.1% | Unchanged | 13F ↗ |
| 23 | CARG CarGurus, Inc. | 368,573 | $11.5M | 2.0% | +0.4% | 13F ↗ |
| 24 | PRLB Proto Labs, Inc. | 118,371 | $11.2M | 1.9% | +1.8% | 13F ↗ |
| 25 | ASPN Aspen Aerogels, Inc. | 1.56M | $8.5M | 1.5% | +1.4% | 13F ↗ |
| 26 | BKD Brookdale Senior Living Inc. | 739,175 | $8.0M | 1.4% | New | 13F ↗ |
| 27 | BV BrightView Holdings, Inc. | 748,393 | $7.5M | 1.3% | New | 13F ↗ |
| 28 | OSUR OraSure Technologies, Inc. | 1.83M | $7.2M | 1.2% | +14.7% | 13F ↗ |
| 29 | DV DoubleVerify Holdings, Inc. | 467,095 | $6.3M | 1.1% | -10.7% | 13F ↗ |
| 30 | KLTR Kaltura, Inc. | 4.59M | $5.9M | 1.0% | +40.6% | 13F ↗ |
| 31 | Whitecap Resources Inc | 436,734 | $5.4M | 0.9% | +0.4% | 13F ↗ |
| 32 | HZO MarineMax, Inc. | 103,184 | $5.4M | 0.9% | -51.2% | 13F ↗ |
| 33 | PNTG The Pennant Group, Inc. | 135,035 | $5.3M | 0.9% | Unchanged | 13F ↗ |
| 34 | CMG Chipotle Mexican Grill, Inc. | 156,350 | $5.0M | 0.9% | +0.6% | 13F ↗ |
| 35 | ICUI ICU Medical, Inc. | 29,630 | $4.8M | 0.8% | +0.8% | 13F ↗ |
| 36 | CTRE CareTrust REIT, Inc. | 129,955 | $4.8M | 0.8% | Unchanged | 13F ↗ |
| 37 | CELC Celcuity Inc. | 53,319 | $4.2M | 0.7% | +0.1% | 13F ↗ |
| 38 | MCHP Microchip Technology Incorporated | 26,577 | $2.1M | 0.4% | +1.3% | 13F ↗ |
| 39 | NCNO nCino, Inc. | 73,495 | $1.3M | 0.2% | -2.4% | 13F ↗ |
| 40 | GNTX Gentex Corporation | 58,417 | $1.3M | 0.2% | +2.2% | 13F ↗ |
| 41 | SLG SL Green Realty Corp | 25,862 | $1.3M | 0.2% | Unchanged | 13F ↗ |
| 42 | SAM Boston Beer Company, Inc. | 7,519 | $1.2M | 0.2% | +3.2% | 13F ↗ |
| 43 | GNL Global Net Lease, Inc. · Reit | 148,055 | $1.2M | 0.2% | -7.8% | 13F ↗ |
| 44 | SKYD Skydance Corporation | 108,399 | $1.1M | 0.2% | New | 13F ↗ |
| 45 | Nintendo Co Ltd-Unspons ADR | 72,483 | $908.2K | 0.2% | +2.6% | 13F ↗ |
| 46 | GOOGL Alphabet Inc. Class A | 2,556 | $879.5K | 0.2% | Unchanged | 13F ↗ |
| 47 | T AT&T Inc. | 35,241 | $859.9K | 0.1% | +14.1% | 13F ↗ |
| 48 | MRVL Marvell Technology, Inc. | 3,232 | $853.9K | 0.1% | +10.6% | 13F ↗ |
| 49 | APPS Digital Turbine, Inc. | 74,483 | $826.8K | 0.1% | -9.0% | 13F ↗ |
| 50 | DOCU DocuSign, Inc. | 12,159 | $816.5K | 0.1% | -41.8% | 13F ↗ |
Showing the top 50 of 84 positions. Premium lists every position, plus puts and calls.
Changes since Q2 2026
8 new, 36 added to, 24 trimmed, 7 exited, 16 unchanged. By estimated dollars.
New positions (8)
| NVGS Navigator Holdings Ltd. | 607,557 | New | $14.1M |
| BKD Brookdale Senior Living Inc. | 739,175 | New | $8.0M |
| BV BrightView Holdings, Inc. | 748,393 | New | $7.5M |
| SKYD Skydance Corporation | 108,399 | New | $1.1M |
| TGLS Tecnoglass Holdings Inc. | 13,667 | New | $485.5K |
| ABT Abbott Laboratories | 4,769 | New | $471.3K |
| AMT American Tower Corporation | 2,776 | New | $454.4K |
| GRSD Grandstand Limited | 153,455 | New | $231.7K |
Added to (36)
| BL BlackLine, Inc. | 520,030 | +38.4% | $3.8M |
| VERX Vertex, Inc. | 1.05M | +37.3% | $3.3M |
| QDEL QuidelOrtho Corporation | 1.30M | +26.0% | $2.8M |
| TMCI Treace Medical Concepts, Inc. | 3.42M | +12.8% | $1.7M |
| KLTR Kaltura, Inc. | 4.59M | +40.6% | $1.7M |
| AMRC Ameresco, Inc. | 896,427 | +8.5% | $1.4M |
| OSUR OraSure Technologies, Inc. | 1.83M | +14.7% | $919.1K |
| GNRC Generac Holdlings Inc. | 76,684 | +4.8% | $727.2K |
| PROF Profound Medical Corp. | 2.05M | +4.6% | $525.0K |
| PCRX Pacira BioSciences, Inc. | 624,805 | +2.7% | $405.5K |
Trimmed (24)
| CDNA CareDx, Inc. | 1.07M | -39.3% | -$45.3M |
| HZO MarineMax, Inc. | 103,184 | -51.2% | -$5.7M |
| FIVN Five9, Inc. | 566,846 | -21.6% | -$5.3M |
| ENSG The Ensign Group, Inc. | 163,342 | -6.1% | -$1.8M |
| WEAV Weave Communications Inc | 49,143 | -68.7% | -$797.2K |
| DV DoubleVerify Holdings, Inc. | 467,095 | -10.7% | -$758.6K |
| CAKE The Cheesecake Factory Incorporated | 215,886 | -2.7% | -$621.5K |
| WGS GeneDx Holdings Corp. | 516,284 | -1.6% | -$620.4K |
| DOCU DocuSign, Inc. | 12,159 | -41.8% | -$587.4K |
| AMPL Amplitude, Inc. | 1.03M | -2.7% | -$389.8K |
The 10 largest of each, by estimated dollars: shares changed times the later report's price. Index tracking, splits and mergers move positions too.
All positions
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Every position, puts and calls. Part of Premium.
Compare two quarters
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Any two quarters side by side. Part of Premium.
Reported value by quarter
Value and number of positions at the end of each quarter.
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Largest positions in earlier quarters
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Ten largest positions
By value, Q3 2026.
Filings
| Filing | ||||||
|---|---|---|---|---|---|---|
| Q3 2026 | Nov 5, 2026 | 13F-HR | 84 | $576.5M | Current | SEC ↗ |
| Q2 2026 | Aug 5, 2026 | 13F-HR | 83 | $518.8M | Current | SEC ↗ |
| Q1 2026 | Apr 22, 2026 | 13F-HR | 85 | $433.2M | Current | SEC ↗ |
| Q4 2025 | Feb 13, 2026 | 13F-HR | 86 | $491.1M | Current | SEC ↗ |
| Q3 2025 | Nov 3, 2025 | 13F-HR | 86 | $498.5M | Current | SEC ↗ |
| Q2 2025 | Jul 23, 2025 | 13F-HR | 87 | $492.4M | Current | SEC ↗ |
| Q1 2025 | May 9, 2025 | 13F-HR | 98 | $454.5M | Current | SEC ↗ |
Most recent first, up to 80. An amendment can replace a report or add holdings to it. All 13F filings
Information, not investment advice. Values are the fund's own figures at quarter end; a report can be up to 45 days old when filed. Disclaimer