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Super Investors / GAGNON SECURITIES LLC
GS

GAGNON SECURITIES LLC

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$519M
Positions
83
Quarter ended
June 30, 2026
Filed
August 05, 2026

Reported portfolio value by quarter (53 quarters reported)

$704M $204M
Q2 13 Q1 16 Q4 18 Q3 21 Q2 24 Q2 26

$276M in Q2 2013 → $519M now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
Caredx Inc 9.7% Added 0.5% 1,770,735 $50.5M
Genedx Holdings Corp 6.9% Added 73% 524,865 $36M
Ensign Group Inc 5.4% Trimmed 3.2% 173,911 $27.9M
Ameresco Inc 4.4% Trimmed 1.6% 826,562 $22.8M
GH Generac Hldgs Inc 4.1% Trimmed 2.3% 73,170 $21.4M
EP Enterprise Prods Partners L P 3.6% Trimmed 0.7% 510,576 $18.8M
Quidelortho Corp 3.5% Added 155% 1,030,371 $18M
Cheesecake Factory Inc 3.4% Trimmed 1.4% 221,792 $17.6M
Equinix Inc 3.4% Trimmed 1.4% 16,720 $17.4M
Carmax Inc 3.3% Added 5.1% 325,410 $17.2M
Freshworks Inc 3.1% Trimmed 9.7% 1,563,866 $15.8M
Pacira Biosciences Inc 3.0% Trimmed 1.4% 608,617 $15.4M
Five9 Inc 3.0% Added 16% 722,698 $15.4M
Hinge Health Inc 2.9% Added 47% 182,959 $15.2M
Biolife Solutions Inc 2.9% Trimmed 0.1% 535,906 $15.1M
PM Profound Med Corp 2.5% Added 0.8% 1,960,074 $13M
Cargurus Inc 2.4% Added 35% 367,073 $12.5M
TM Treace Med Concepts Inc 2.3% Trimmed 42% 3,029,543 $12.1M
NH Navigator Hldgs Ltd 2.3% New 765,179 $11.7M
Intuitive Surgical Inc 2.2% Trimmed 7.8% 29,144 $11.6M
Blackline Inc 2.0% Added 27% 375,769 $10.5M
Aspen Aerogels Inc 1.9% Trimmed 18% 1,535,812 $9.74M
Proto Labs Inc 1.8% Added 4.9% 116,283 $9.48M
Vertex Inc 1.7% Added 63% 761,026 $8.74M
Amplitude Inc 1.6% Trimmed 0.4% 1,055,508 $8.07M
Marinemax Inc 1.5% Trimmed 4.1% 211,480 $7.74M
Orasure Technologies Inc 1.4% Trimmed 7.1% 1,592,147 $7.1M
DH Doubleverify Hldgs Inc 1.1% Added 7.1% 523,328 $5.67M
Celcuity Inc 1.1% Trimmed 0.2% 53,240 $5.57M
Chipotle Mexican Grill Inc 1.0% Trimmed 1.5% 155,463 $5.29M
Caretrust REIT Inc 1.0% Trimmed 2.3% 129,955 $5.24M
Pennant Group Inc 1.0% Trimmed 1.8% 135,035 $4.99M
WR Whitecap Res Inc 0.9% Trimmed 0.1% 435,100 $4.52M
IM Icu Med Inc 0.8% Trimmed 1.2% 29,400 $4.31M
Kaltura Inc 0.8% Trimmed 0.4% 3,266,999 $4.25M
Microchip Technology Inc. 0.5% Trimmed 2.3% 26,229 $2.39M
Gentex Corp 0.3% Added 0.4% 57,159 $1.44M
Global Net Lease Inc 0.3% Trimmed 5.6% 160,598 $1.44M
SG Sl Green Rlty Corp 0.3% Unchanged 25,862 $1.34M
Boston Beer Inc 0.2% Added 0.6% 7,283 $1.29M
Ncino Inc 0.2% Trimmed 5.3% 75,333 $1.23M
FB Flagstar Bank National Associa 0.2% Trimmed 0.3% 74,456 $1.11M
Digital Turbine Inc 0.2% Unchanged 81,839 $1.06M
Webull Corp 0.2% Added 359% 157,170 $999K
Docusign Inc 0.2% Trimmed 1.5% 20,906 $929K
CH Cnfinance Hldgs Ltd 0.2% Added 5.9% 332,345 $921K
Alphabet Inc 0.2% Unchanged 2,556 $913K
Marvell Technology Inc 0.2% Trimmed 57% 2,923 $871K
Bio-techne Corp 0.2% Added 24% 12,230 $864K
DE Devon Energy Corp 0.2% Trimmed 0.2% 19,021 $786K
Micron Technology Inc 0.2% Trimmed 37% 679 $784K
N Nintendo Ltd 0.1% Added 1.4% 70,675 $741K
Cognex Corp 0.1% Added 0.2% 9,798 $710K
Nvidia Corporation 0.1% Trimmed 4.3% 3,498 $700K
CS Commvault Sys Inc 0.1% Added 11% 4,874 $691K
Alphabet Inc 0.1% Trimmed 0.3% 1,929 $682K
Onto Innovation Inc 0.1% Trimmed 24% 1,709 $647K
AT&T Inc 0.1% Trimmed 3.7% 30,898 $640K
Himax Technologies Inc 0.1% Trimmed 12% 39,498 $606K
Pfizer Inc 0.1% Trimmed 47% 23,346 $562K

Showing top 60 of 83 positions.

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 8 quarters.

Q2 2026

quarter ended June 30, 2026 · filed August 05, 2026

Company Action Shares changed Value of change % of portfolio
NH Navigator Hldgs Ltd Exited −886,631 −$17.1M
Genedx Holdings Corp Added +221,716 +$15.2M 6.9%
NH Navigator Hldgs Ltd New +765,179 +$11.7M 2.3%
Quidelortho Corp Added +627,046 +$11M 3.5%
IT Ishares Tr Exited −92,702 −$9.33M
TM Treace Med Concepts Inc Trimmed −2,172,343 −$8.65M 2.3%
Hinge Health Inc Added +58,709 +$4.87M 2.9%
A& Alpha & Omega Semiconductor Lt Exited −167,874 −$3.72M
Vertex Inc Added +292,806 +$3.36M 1.7%
Cargurus Inc Added +95,549 +$3.26M 2.4%

Showing the 10 largest of 81 changes.

Q1 2026

quarter ended March 31, 2026 · filed April 22, 2026

Company Action Shares changed Value of change % of portfolio
AL Air Lease Corp Exited −496,957 −$31.9M
Exact Sciences Corp Exited −167,414 −$17M
IT Ishares Tr New +92,702 +$9.33M 2.2%
Hinge Health Inc New +124,250 +$4.79M 1.1%
Freshworks Inc Added +501,356 +$4.03M 3.2%
Quidelortho Corp Added +244,148 +$4.01M 1.5%
Genedx Holdings Corp Added +49,615 +$3.19M 4.5%
Nvidia Corporation Trimmed −16,862 −$2.94M 0.1%
TM Treace Med Concepts Inc Added +2,091,311 +$2.8M 1.6%
Marinemax Inc Trimmed −101,443 −$2.75M 1.4%

Showing the 10 largest of 87 changes.

Q4 2025

quarter ended December 31, 2025 · filed February 13, 2026

Company Action Shares changed Value of change % of portfolio
Freshworks Inc Trimmed −635,807 −$7.79M 3.1%
AL Air Lease Corp Trimmed −108,661 −$6.98M 6.5%
Intuitive Surgical Inc Trimmed −11,562 −$6.55M 3.7%
Five9 Inc Added +326,323 +$6.54M 2.6%
PS Power Solutions Intl Inc Exited −64,770 −$6.36M
Carmax Inc Added +94,448 +$3.65M 2.5%
Boston Beer Inc Trimmed −15,153 −$2.96M 0.3%
Amplitude Inc Added +188,139 +$2.18M 1.6%
DH Doubleverify Hldgs Inc Trimmed −188,253 −$2.15M 1.1%
TM Treace Med Concepts Inc Added +852,337 +$2.09M 1.6%

Showing the 10 largest of 77 changes.

Q3 2025

quarter ended September 30, 2025 · filed November 03, 2025

Company Action Shares changed Value of change % of portfolio
PS Power Solutions Intl Inc Trimmed −276,841 −$27.2M 1.3%
Freshworks Inc Added +941,228 +$11.1M 4.4%
AL Air Lease Corp Trimmed −130,819 −$8.33M 7.7%
Marinemax Inc New +261,349 +$6.62M 1.3%
Amplitude Inc New +510,731 +$5.48M 1.1%
Exact Sciences Corp Trimmed −99,347 −$5.44M 2.0%
Intuitive Surgical Inc Trimmed −10,465 −$4.68M 3.9%
Ensign Group Inc Trimmed −25,964 −$4.49M 6.3%
DH Doubleverify Hldgs Inc Added +314,917 +$3.77M 1.6%
Carmax Inc Added +62,212 +$2.79M 2.0%

Showing the 10 largest of 93 changes.

Q2 2025

quarter ended June 30, 2025 · filed July 23, 2025

Company Action Shares changed Value of change % of portfolio
PS Power Solutions Intl Inc Trimmed −183,680 −$11.9M 4.5%
Aspen Aerogels Inc New +1,899,108 +$11.2M 2.3%
E2open Parent Holdings Inc Exited −3,820,311 −$7.64M
Veren Inc Exited −1,124,330 −$7.44M
DH Doubleverify Hldgs Inc Added +269,170 +$4.03M 1.1%
Equinix Inc Added +3,802 +$3.02M 2.8%
TM Treace Med Concepts Inc Added +503,612 +$2.96M 2.7%
Maxcyte Inc Exited −1,048,318 −$2.86M
Caredx Inc Added +127,223 +$2.49M 6.1%
Ncino Inc Trimmed −88,091 −$2.46M 0.2%

Showing the 10 largest of 82 changes.

Q1 2025

quarter ended March 31, 2025 · filed May 09, 2025

Company Action Shares changed Value of change % of portfolio
PS Power Solutions Intl Inc Trimmed −324,855 −$8.21M 2.9%
Genedx Holdings Corp Trimmed −74,465 −$6.59M 5.6%
Ameresco Inc Added +397,326 +$4.8M 2.6%
Orasure Technologies Inc New +1,073,771 +$3.62M 0.8%
E2open Parent Holdings Inc Added +1,637,418 +$3.27M 1.7%
Vertex Inc Added +92,810 +$3.25M 2.1%
Blackline Inc Added +53,460 +$2.59M 2.7%
Cargurus Inc Trimmed −88,562 −$2.58M 2.1%
Ionq Inc Added +105,584 +$2.33M 0.5%
Maxcyte Inc Added +850,992 +$2.32M 0.6%

Showing the 10 largest of 96 changes.

Q4 2024

quarter ended December 31, 2024 · filed January 24, 2025

Company Action Shares changed Value of change % of portfolio
Genedx Holdings Corp Trimmed −182,567 −$14M 5.6%
Secureworks Corp Trimmed −1,296,666 −$11M 0.3%
Ionq Inc Trimmed −236,595 −$9.88M
Zuora Inc Exited −1,050,133 −$9.05M
PS Power Solutions Intl Inc Trimmed −169,481 −$5.04M 5.1%
Ncino Inc New +124,759 +$4.19M 0.8%
Ameresco Inc Added +104,861 +$2.46M 2.7%
Ensign Group Inc Trimmed −14,106 −$1.87M 5.9%
Veren Inc Added +333,270 +$1.71M 1.1%
Freshworks Inc Trimmed −104,474 −$1.69M 2.7%

Showing the 10 largest of 101 changes.

Q3 2024

quarter ended September 30, 2024 · filed November 12, 2024

Company Action Shares changed Value of change % of portfolio
Caredx Inc Trimmed −736,445 −$23M 8.9%
TM Treace Med Concepts Inc Added +1,286,582 +$7.46M 2.0%
Intuitive Surgical Inc Added +11,399 +$5.6M 6.0%
PS Power Solutions Intl Inc Trimmed −263,026 −$5.41M 4.2%
Quidelortho Corp Trimmed −112,123 −$5.11M 0.6%
Pacira Biosciences Inc Trimmed −289,648 −$4.36M 0.9%
Ameresco Inc Added +107,068 +$4.06M 3.5%
A& Alpha & Omega Semiconductor Lt Trimmed −96,872 −$3.6M 1.6%
GH Generac Hldgs Inc Added +16,816 +$2.67M 1.7%
Five9 Inc Added +77,967 +$2.24M 1.9%

Showing the 10 largest of 106 changes.

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