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Gagnon Securities LLC

CIK 1125725 · latest 13F filed 5 August 2026 · Read the filing on EDGAR

Gagnon Securities LLC reported 83 US-listed holdings worth $518.8 million in its 13F for the quarter ended 30 June 2026, filed 5 August 2026. Its largest: Caredx Inc. (9.7%), Genedx Holdings Corp. (6.9%) and Ensign Group, Inc. (5.4%). Against the quarter before, it opened 4 positions, added to 25, trimmed 45 and sold out of 6.

Reported holdings$518.8M+19.8% on Q1 2026
Positions83-2 on Q1 2026
The largest ten47.7%of its reported holdings
Latest 13FQ2 2026filed 5 August 2026
Where the money is
Added toTrimmed
CDNA9.7%WGS6.9%ENSG5.4%AMRC4.4%GNRC4.1%EPD3.6%QDEL3.5%CAKE3.4%EQIX3.4%KMX3.3%FRSH3.1%PCRX3.0%FIVN3.0%HNGE2.9%69 more40.3%

The 14 largest of its 83 positions, each sized by its share of the reported holdings, coloured by the change in shares against Q1 2026.

Reported holdings, quarter by quarter
Q3 2024: $504.4 million in 102 positions$504MQ3 24Q4 2024: $496.3 million in 91 positions$496MQ4 24Q1 2025: $454.5 million in 98 positions$455MQ1 25Q2 2025: $492.4 million in 87 positions$492MQ2 25Q3 2025: $498.5 million in 86 positions$499MQ3 25Q4 2025: $491.1 million in 86 positions$491MQ4 25Q1 2026: $433.2 million in 85 positions$433MQ1 26Q2 2026: $518.8 million in 83 positions$519MQ2 26

What the fund reported holding at each quarter's end; hover a bar for the number of positions

What its reported holdings returned

Held through each quarter, the holdings it reported returned +28.0% over the 7 quarters to 30 June 2026, against +30.2% for the S&P 500.

Its reported holdingsThe S&P 500
100110120130Q3 24Q4 24Q1 25Q2 25Q3 25Q4 25Q1 26Q2 26Its holdings +28.0%S&P 500 +30.2%

Not the fund's own return: each 13F's holdings are kept unchanged until the next one, so trades inside a quarter, dividends, cash and fees are left out. A rough guide to how its picks have done over time.

What it did on the quarter

Opened 4Added 25Held 9Trimmed 45Sold out 6
Opened: 4Added: 25Held: 9Trimmed: 45Sold out: 6

Its positions against its 13F for the quarter to 31 March 2026; a change under 0.1% of a position counts as held

Opened 4

  1. NA$11.7 million
  2. Warby Parker Inc. WRBY$345,300
  3. Vericel Corp. VCEL$324,910
  4. Beyond Meat Inc.$285,953

Added to 25

  1. Genedx Holdings Corp. WGS+221,716 shares · +73%
  2. QuidelOrtho Corp. QDEL+627,046 shares · +155%
  3. Hinge Health Inc. HNGE+58,709 shares · +47%
  4. Vertex Inc. VERX+292,806 shares · +63%
  5. CarGurus, Inc. CARG+95,549 shares · +35%
  6. Blackline, Inc. BL+79,345 shares · +27%
  7. Five9, Inc. FIVN+100,634 shares · +16%
  8. Carmax Inc. KMX+15,711 shares · +5%

and 17 more in the table below

Trimmed 45

  1. Treace Med Concepts Inc. TMCI-2.2 million shares · -42%
  2. Patterson-UTI Energy, Inc. PTEN-297,226 shares · -94%
  3. Aspen Aerogels Inc. ASPN-326,039 shares · -18%
  4. Freshworks Inc. FRSH-167,501 shares · -10%
  5. Marvell Technology, Inc. MRVL-3,902 shares · -57%
  6. Intuitive Surgical Inc. ISRG-2,475 shares · -8%
  7. Ensign Group, Inc. ENSG-5,760 shares · -3%
  8. Macom Technology Solutions Holdings, Inc. MTSI-2,389 shares · -65%

and 37 more in the table below

Sold out of 6

  1. Navigator Hldgs Ltd NVGS$17.1 million last quarter
  2. iShares Trust SGOV$9.3 million last quarter
  3. Alpha & Omega Semiconductor Ltd. AOSL$3.7 million last quarter
  4. Gambling Com Group Limited GRSD$425,624 last quarter
  5. EOG Resources Inc. EOG$267,599 last quarter
  6. Savers Value VLG Inc. SVV$187,101 last quarter

What it holds

CompanySharesValueOf its bookChange in shares
Caredx Inc. CDNA1.8M$50.5 million9.73%+8.9K
Genedx Holdings Corp. WGS524.9K$36.0 million6.94%+221.7K
Ensign Group, Inc. ENSG173.9K$27.9 million5.37%-5.8K
Ameresco, Inc. AMRC826.6K$22.8 million4.40%-13.5K
Generac Holdings Inc. GNRC73.2K$21.4 million4.13%-1.7K
Enterprise Products Partners LP EPD510.6K$18.8 million3.62%-3.7K
QuidelOrtho Corp. QDEL1.0M$18.0 million3.48%+627.0K
Cheesecake Factory Inc. CAKE221.8K$17.6 million3.40%-3.3K
Equinix Inc. EQIX16.7K$17.4 million3.36%-231
Carmax Inc. KMX325.4K$17.2 million3.32%+15.7K
Freshworks Inc. FRSH1.6M$15.8 million3.05%-167.5K
Pacira BioSciences, Inc. PCRX608.6K$15.4 million2.98%-8.9K
Five9, Inc. FIVN722.7K$15.4 million2.97%+100.6K
Hinge Health Inc. HNGE183.0K$15.2 million2.93%+58.7K
Biolife Solutions Inc. BLFS535.9K$15.1 million2.92%-606
Profound Med Corp. Com New PROF2.0M$13.0 million2.51%+15.8K
CarGurus, Inc. CARG367.1K$12.5 million2.41%+95.5K
Treace Med Concepts Inc. TMCI3.0M$12.1 million2.32%-2.2M
NA765.2K$11.7 million2.25%new
Intuitive Surgical Inc. ISRG29.1K$11.6 million2.23%-2.5K
Blackline, Inc. BL375.8K$10.5 million2.03%+79.3K
Aspen Aerogels Inc. ASPN1.5M$9.7 million1.88%-326.0K
Proto Labs Inc. PRLB116.3K$9.5 million1.83%+5.4K
Vertex Inc. VERX761.0K$8.7 million1.68%+292.8K
Amplitude Inc. AMPL1.1M$8.1 million1.56%-4.3K
Marinemax Inc. HZO211.5K$7.7 million1.49%-9.1K
Orasure Technologies Inc. OSUR1.6M$7.1 million1.37%-122.2K
DoubleVerify Holdings, Inc. DV523.3K$5.7 million1.09%+34.9K
Celcuity Inc. CELC53.2K$5.6 million1.07%-102
Chipotle Mexican Grill Inc. CMG155.5K$5.3 million1.02%-2.4K
CareTrust REIT, Inc. CTRE130.0K$5.2 million1.01%-3.1K
Pennant Group Inc. PNTG135.0K$5.0 million0.96%-2.4K
Whitecap Res Inc. WCPRF435.1K$4.5 million0.87%-318
ICU Medical Inc. ICUI29.4K$4.3 million0.83%-343
Kaltura Inc. KLTR3.3M$4.2 million0.82%-11.9K
Microchip Technology Inc. MCHP26.2K$2.4 million0.46%-609
Gentex Corp. GNTX57.2K$1.4 million0.28%+226
Global Net Lease, Inc. GNL160.6K$1.4 million0.28%-9.5K
SL Green Realty Corp. SLG25.9K$1.3 million0.26%no change
Boston Beer Inc. SAM7.3K$1.3 million0.25%+44
Ncino Inc. NCNO75.3K$1.2 million0.24%-4.2K
Flagstar Bank, National Association FLG74.5K$1.1 million0.21%-255
Digital Turbine Inc. APPS81.8K$1.1 million0.20%no change
Weave Communications Inc. WEAV157.2K$998,7030.19%+123.0K
Docusign, Inc. DOCU20.9K$928,6450.18%-326
Cnfinance Hldgs Ltd CNF332.3K$920,5960.18%+18.4K
Alphabet Inc. GOOGL2.6K$913,4380.18%no change
Marvell Technology, Inc. MRVL2.9K$870,7340.17%-3.9K
Bio-Techne Corp. TECH12.2K$864,0500.17%+2.4K
Devon Energy Corp. DVN19.0K$785,9480.15%-45
Micron Technology Inc. MU679$783,7630.15%-398
Nintendo NTDOY70.7K$740,6740.14%+978
Cognex Corp. CGNX9.8K$709,5710.14%+18
NVIDIA Corp. NVDA3.5K$699,9150.13%-157
Commvault Systems Inc. CVLT4.9K$690,7920.13%+498
Alphabet Inc. GOOG1.9K$681,5740.13%-5
Onto Innovation Inc. ONTO1.7K$646,7710.12%-533
AT&T Inc. T30.9K$639,5890.12%-1.2K
Himax Technologies Inc. HIMX39.5K$605,8990.12%-5.3K
Pfizer Inc. PFE23.3K$562,1720.11%-20.9K
Life Time Group Holdings, Inc. LTH13.5K$549,9110.11%-85
Macom Technology Solutions Holdings, Inc. MTSI1.3K$487,2540.09%-2.4K
Viavi Solutions Inc. VIAV10.0K$476,8320.09%-4.5K
Meta Platforms, Inc. META839$472,6000.09%no change
Shopify Inc. SHOP4.0K$459,3460.09%+91
Etsy Inc. ETSY5.8K$433,5240.08%-18
Starbucks Corp. SBUX4.0K$413,3590.08%-26
Merck & Co., Inc. MRK3.2K$409,5300.08%-5
Ces Energy Solutions Corp.33.4K$389,5040.08%no change
Akamai Technologies Inc. AKAM3.2K$373,8980.07%+267
Warby Parker Inc. WRBY11.4K$345,3000.07%new
RingCentral, Inc. RNG8.5K$331,9930.06%+95
Vericel Corp. VCEL7.3K$324,9100.06%new
Beyond Meat Inc.381.3K$285,9530.06%new
Planet Labs PBC PL8.4K$276,7020.05%no change
Electrovaya Inc. ELVA26.3K$276,2240.05%+50
Aileron Therapeutics Inc. RNTX229.1K$238,2330.05%-10.4K
Rambus Inc. RMBS1.8K$236,0120.05%-944
Blackstone Inc. BX1.9K$228,2800.04%no change
Microsoft Corp. MSFT556$207,3990.04%+11
Actinium Pharmaceuticals Inc. ATNM182.1K$178,4990.03%-19.2K
Patterson-UTI Energy, Inc. PTEN17.4K$159,9160.03%-297.2K
Redhill Biopharma Ltd RDHL88.4K$74,7020.01%no change
Every US-listed position in the fund's 13F for the quarter ended 30 June 2026, by the value it reported.
Read moreChange is shares against its 13F for the quarter before; the 6 it sold out of are in the box above.