CIK: 0001125725
Total reported value
$433.2M
Reporting period: 2026-03-31 · Number of holdings: 85
GAGNON SECURITIES LLC disclosed 85 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $433.2M and a quarterly turnover rate of 33.4%.
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Gagnon Securities LLC's disclosed holdings carry a Herfindahl concentration index of 0.034 — mathematically equivalent to about 29 equally-sized positions, well below its 85 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 1.38), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 7% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Trim WGS
+19.6% -$13.5M
Add ENSG
-0.5% $4.8M
Add GNRC
-0.9% $4.3M
Add EQIX
-1.1% $3.5M
Add EPD
-2.5% $2.5M
Add NVGS
+2.9% $2.2M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | ENSG | Ensign Group Inc/the | Stock-Healthcare | 8.36% | +1.96% | -0.49% | |
| 2 | CDNA | Caredx INC | Stock-Other | 7.06% | +0.25% | -0.73% | |
| 3 | AMRC | Ameresco Inc-cl A | Stock-Other | 4.94% | -0.03% | +0.86% | |
| 4 | WGS | Genedx Holdings CORP | Stock-Other | 4.49% | -2.22% | +19.57% | |
| 5 | EPD | Enterprise Products Partners | Stock-Energy | 4.49% | +1.05% | -2.53% | |
| 6 | NVGS | Navigator Holdings Ltd. | Stock-Other | 3.96% | +0.92% | +2.87% | |
| 7 | EQIX | Equinix INC | Stock-Real Estate | 3.84% | +1.17% | -1.11% | |
| 8 | GNRC | Generac Holdings INC | Stock-Industrials | 3.38% | +1.28% | -0.90% | |
| 9 | ISRG | Intuitive Surgical INC | Stock-Healthcare | 3.36% | -0.31% | -0.56% | |
| 10 | PCRX | Pacira Biosciences INC | Stock-Other | 3.22% | +0.58% | +23.20% | |
| 11 | FRSH | Freshworks Inc-cl A | Stock-Other | 3.21% | +0.14% | +40.76% | |
| 12 | KMX | Carmax INC | Stock-Consumer Disc | 2.97% | +0.45% | -3.24% | |
| 13 | PROF | Profound Medical CORP | Stock-Other | 2.91% | -0.21% | +0.01% | |
| 14 | CAKE | Cheesecake Factory Inc/the | Stock-Consumer Disc | 2.84% | +0.51% | -0.68% | |
| 15 | BL | Blackline INC | Stock-Tech | 2.53% | -0.62% | +6.09% | |
| 16 | BLFS | Biolife Solutions INC | Stock-Other | 2.36% | -0.27% | +0.40% | |
| 17 | FIVN | Five9 INC | Stock-Tech | 2.18% | -0.37% | -0.59% | |
| 18 | SGOV | Ishares 0-3 Month Treasury B | ETF-Gov Bonds | 2.15% | +2.15% | NEW | |
| 19 | CARG | Cargurus INC | Stock-Consumer Disc | 2.13% | +0.02% | +0.26% | |
| 20 | AMPL | Amplitude Inc-class A | Stock-Other | 1.67% | +0.02% | +51.65% | |
| 21 | TMCI | Treace Medical Concepts INC | Stock-Other | 1.61% | +0.06% | +67.23% | |
| 22 | QDEL | Quidelortho CORP | Stock-Other | 1.53% | +0.60% | +153.38% | |
| 23 | ASPN | Aspen Aerogels INC | Stock-Other | 1.47% | +0.82% | +64.29% | |
| 24 | PRLB | Proto Labs INC | Stock-Other | 1.46% | +0.31% | -0.59% | |
| 25 | CELC | Celcuity INC | Stock-Other | 1.41% | +0.33% | -0.11% | |
| 26 | HZO | Marinemax INC | Stock-Other | 1.38% | -0.21% | -31.50% | |
| 27 | VERX | Vertex INC - Class A | Stock-Other | 1.29% | -0.19% | +28.41% | |
| 28 | OSUR | Orasure Technologies INC | Stock-Other | 1.19% | +0.42% | +9.21% | |
| 29 | CMG | Chipotle Mexican Grill INC | Stock-Consumer Disc | 1.17% | -0.01% | +0.56% | |
| 30 | WCPRF | Whitecap Resources INC | Stock-Other | 1.13% | +0.30% | -10.43% | |
| 31 | CTRE | Caretrust Reit INC | Stock-Real Estate | 1.13% | — | -0.02% | |
| 32 | HNGE | Hinge Health Inc-a | Stock-Other | 1.11% | +1.11% | NEW | |
| 33 | DV | Doubleverify Holdings INC | Stock-Other | 1.07% | -0.08% | -0.65% | |
| 34 | PNTG | Pennant Group Inc/the | Stock-Other | 0.97% | +0.18% | -0.03% | |
| 35 | KLTR | Kaltura INC | Stock-Other | 0.92% | -0.04% | +14.59% | |
| 36 | ICUI | Icu Medical INC | Stock-Other | 0.89% | +0.05% | +2.30% | |
| 37 | GOOG | Alphabet Inc. | Stock-Comm Services | 0.86% | -0.01% | -22.15% | |
| 38 | PTEN | Patterson-uti Energy INC | Stock-Energy | 0.79% | +0.35% | -10.81% | |
| 39 | MCHP | Microchip Technology INC | Stock-Tech | 0.40% | — | -1.19% | |
| 40 | SAM | Boston Beer Company Inc-a | Stock-Consumer Staples | 0.39% | +0.13% | +13.91% | |
| 41 | GNL | Global Net Lease INC | Stock-Real Estate | 0.37% | — | -0.23% | |
| 42 | GNTX | Gentex CORP | Stock-Consumer Disc | 0.29% | — | +2.27% | |
| 43 | PFE | Pfizer INC | Stock-Healthcare | 0.29% | — | -0.21% | |
| 44 | CNF | Cnfinance Holdings LTD | Stock-Other | 0.28% | -0.11% | -0.92% | |
| 45 | NCNO | Ncino INC | Stock-Other | 0.27% | -0.10% | +8.20% | |
| 46 | DOCU | Docusign INC | Stock-Tech | 0.23% | +0.23% | NEW | |
| 47 | NTDOY | Nintendo Co Ltd-unspons Adr | Stock-Other | 0.23% | — | -0.89% | |
| 48 | FLG | Flagstar Bank NA | Stock-Financials | 0.23% | — | -0.21% | |
| 49 | DVN | Devon Energy CORP | Stock-Energy | 0.22% | +0.08% | -0.24% | |
| 50 | SLG | Sl Green Realty CORP | Stock-Real Estate | 0.22% | — | +0.09% |
Performance for Q3 2026
+9.3%
Performance Last 4 Quarters
+23%
Based on 77% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 85 | $433.2M | 33 | |
| 2025-12-31 | 86 | $491.1M | 23 | |
| 2025-09-30 | 86 | $498.5M | 33 | |
| 2025-06-30 | 87 | $492.4M | 0 | |
| 2025-03-31 | 98 | $454.5M | 100 | |
| 2024-12-31 | 91 | $496.3M | 0 | |
| 2024-09-30 | 102 | $504.4M | 0 | |
| 2024-06-30 | 97 | $444.0M | 0 | |
| 2024-03-31 | 98 | $422.5M | 0 | |
| 2023-12-31 | 102 | $416.6M | 0 | |
| 2023-09-30 | 97 | $399.1M | 0 | |
| 2023-06-30 | 97 | $480.9M | 0 | |
| 2023-03-31 | 112 | $475.8M | 0 | |
| 2022-12-31 | 106 | $452.9M | 0 | |
| 2022-09-30 | 101 | $454.8M | 0 | |
| 2022-06-30 | 101 | $477.1M | 0 | |
| 2022-03-31 | 103 | $613.2M | 0 | |
| 2021-12-31 | 105 | $666.8M | 0 | |
| 2021-09-30 | 112 | $673.1M | 0 | |
| 2021-06-30 | 111 | $704.3M | 97 | |
| 2021-03-31 | 108 | $656.7M | 31 | |
| 2020-12-31 | 99 | $628.1M | 34 | |
| 2020-09-30 | 100 | $469.0M | 20 | |
| 2020-06-30 | 91 | $413.0M | 38 | |
| 2020-03-31 | 96 | $294.3M | 48 | |
| 2019-12-31 | 93 | $456.9M | 25 | |
| 2019-09-30 | 95 | $422.6M | 18 | |
| 2019-06-30 | 97 | $463.8M | 21 | |
| 2019-03-31 | 97 | $458.7M | 32 | |
| 2018-12-31 | 93 | $376.0M | 27 | |
| 2018-09-30 | 101 | $435.1M | 35 | |
| 2018-06-30 | 97 | $346.7M | 40 | |
| 2018-03-31 | 95 | $280.9M | 17 | |
| 2017-12-31 | 91 | $281.8M | 23 | |
| 2017-09-30 | 95 | $269.0M | 61 | |
| 2017-06-30 | 89 | $360.5M | 75 | |
| 2017-03-31 | 95 | $231.2M | 18 | |
| 2016-12-31 | 96 | $233.1M | 31 | |
| 2016-09-30 | 97 | $235.0M | 55 | |
| 2016-06-30 | 92 | $214.4M | 40 | |
| 2016-03-31 | 88 | $208.9M | 25 | |
| 2015-12-31 | 86 | $218.4M | 16 | |
| 2015-09-30 | 88 | $204.4M | 28 | |
| 2015-06-30 | 89 | $252.8M | 27 | |
| 2015-03-31 | 93 | $301.4M | 24 | |
| 2014-12-31 | 95 | $311.9M | 40 | |
| 2014-09-30 | 99 | $299.3M | 24 | |
| 2014-06-30 | 106 | $308.9M | 34 | |
| 2014-03-31 | 104 | $336.6M | 34 | |
| 2013-12-31 | 98 | $333.1M | 37 | |
| 2013-09-30 | 96 | $320.7M | 55 | |
| 2013-06-30 | 84 | $276.2M | 0 |
Gagnon Securities LLC's most significant position changes for 2026-03-31: Sold out: Air Lease CORP (AL); Sold out: Exact Sciences CORP (EXK); New buy: Ishares 0-3 Month Treasury B (SGOV); New buy: Hinge Health Inc-a (HNGE); Sold out: Tapestry INC (TPR).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | ENSG | Ensign Group Inc/the | +2% | -0.49% | Trim |
| 2 | GNRC | Generac Holdings INC | +1.3% | -0.90% | Trim |
| 3 | EQIX | Equinix INC | +1.2% | -1.11% | Trim |
| 4 | EPD | Enterprise Products Partners | +1.1% | -2.53% | Trim |
| 5 | NVGS | Navigator Holdings Ltd. | +0.9% | +2.87% | Add |
| 6 | ASPN | Aspen Aerogels INC | +0.8% | +64.29% | Add |
| 7 | QDEL | Quidelortho CORP | +0.6% | +153.38% | Add |
| 8 | PCRX | Pacira Biosciences INC | +0.6% | +23.20% | Add |
| 9 | CAKE | Cheesecake Factory Inc/the | +0.5% | -0.68% | Trim |
| 10 | KMX | Carmax INC | +0.5% | -3.24% | Trim |
| 11 | OSUR | Orasure Technologies INC | +0.4% | +9.21% | Add |
| 12 | PTEN | Patterson-uti Energy INC | +0.4% | -10.81% | Trim |
| 13 | CELC | Celcuity INC | +0.3% | -0.11% | Trim |
| 14 | PRLB | Proto Labs INC | +0.3% | -0.59% | Trim |
| 15 | WCPRF | Whitecap Resources INC | +0.3% | -10.43% | Trim |
| 16 | CDNA | Caredx INC | +0.3% | -0.73% | Trim |
| 17 | PNTG | Pennant Group Inc/the | +0.2% | -0.03% | Trim |
| 18 | FRSH | Freshworks Inc-cl A | +0.1% | +40.76% | Add |
| 19 | SAM | Boston Beer Company Inc-a | +0.1% | +13.91% | Add |
| 20 | DVN | Devon Energy CORP | +0.1% | -0.24% | Trim |
| 21 | TMCI | Treace Medical Concepts INC | +0.1% | +67.23% | Add |
| 22 | ICUI | Icu Medical INC | +0.1% | +2.30% | Add |
| 23 | CARG | Cargurus INC | 0% | +0.26% | Add |
| 24 | AMPL | Amplitude Inc-class A | 0% | +51.65% | Add |
| 25 | CMG | Chipotle Mexican Grill INC | 0% | +0.56% | Add |
| 26 | GOOG | Alphabet Inc. | 0% | -22.15% | Trim |
| 27 | AMRC | Ameresco Inc-cl A | 0% | +0.86% | Add |
| 28 | KLTR | Kaltura INC | 0% | +14.59% | Add |
| 29 | WEAV | Weave Communications INC | -0.1% | -51.45% | Trim |
| 30 | DV | Doubleverify Holdings INC | -0.1% | -0.65% | Trim |
| 31 | NCNO | Ncino INC | -0.1% | +8.20% | Add |
| 32 | CNF | Cnfinance Holdings LTD | -0.1% | -0.92% | Trim |
| 33 | VERX | Vertex INC - Class A | -0.2% | +28.41% | Add |
| 34 | PROF | Profound Medical CORP | -0.2% | +0.01% | Add |
| 35 | HZO | Marinemax INC | -0.2% | -31.50% | Trim |
| 36 | BLFS | Biolife Solutions INC | -0.3% | +0.40% | Add |
| 37 | ISRG | Intuitive Surgical INC | -0.3% | -0.56% | Trim |
| 38 | FIVN | Five9 INC | -0.4% | -0.59% | Trim |
| 39 | BL | Blackline INC | -0.6% | +6.09% | Add |
| 40 | NVDA | Nvidia CORP | -0.6% | -82.19% | Trim |
| 41 | WGS | Genedx Holdings CORP | -2.2% | +19.57% | Add |
| 42 | AL | Air Lease CORP | — | EXIT | Sold out |
| 43 | EXK | Exact Sciences CORP | — | EXIT | Sold out |
| 44 | SGOV | Ishares 0-3 Month Treasury B | — | NEW | New buy |
| 45 | HNGE | Hinge Health Inc-a | — | NEW | New buy |
| 46 | TPR | Tapestry INC | — | EXIT | Sold out |
| 47 | DOCU | Docusign INC | — | NEW | New buy |
| 48 | XOM | Exxon Mobil CORP | — | EXIT | Sold out |
| 49 | PYPL | Paypal Holdings INC | — | EXIT | Sold out |
| 50 | EOG | Eog Resources INC | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-04-22 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-13 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-03 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-07-23 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-09 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-01-24 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-12 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-14 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-13 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-14 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-08 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-04-10 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-07 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-01 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-09 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-08 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-12 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-07-28 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-14 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-12 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-12 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-13 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-11 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-14 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-08 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-12 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-13 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-01-18 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-13 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-09 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-09 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-13 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-14 | Amendment | View on EDGAR |
| 2017-09-30 | 2017-11-14 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-07-20 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-11 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-14 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-14 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-24 | Amendment | View on EDGAR |
| 2016-06-30 | 2016-08-10 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-03 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-16 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-10-16 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-07-24 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-12 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-13 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-10-15 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-07-31 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-06 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-06 | Amendment | View on EDGAR |
| 2013-12-31 | 2014-01-14 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-10-18 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-02 | 13F-HR | View on EDGAR |
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