GAGNON SECURITIES LLC
Sector Allocation
- Healthcare43.3%$224.6M
- Technology25.6%$133.0M
- Consumer Discretionary11.2%$58.0M
- Industrials6.7%$34.5M
- Energy6.0%$31.4M
- Real Estate4.9%$25.4M
- Other1.1%$5.6M
- Financials0.6%$3.3M
- Consumer Staples0.3%$1.6M
- Communication Services0.2%$1.2M
AUM History
13fpro.ai/research/fund/gagnon-securities-llc-1125725
Conviction and streaks
Stable · top 10 = 47.7%From the fund's last 12 quarters of 13F filings: positions held longest at size, and names it added to or trimmed several quarters running.
Largest positions — Q2 2026
CDNA
$50.5MWGS
$36.0MENSG
$27.9MAMRC
$22.8MGNRC
$21.4MEPD
$18.8MQDEL
$18.0MCAKE
$17.6MEQIX
$17.4MKMX
$17.2MFRSH
$15.8MPCRX
$15.4MFIVN
$15.4MHNGE
$15.2MBLFS
$15.1MPROF
$13.0MCARG
$12.5MTMCI
$12.1MNOV
$11.7MISRG
$11.6M
Top 20 stock positions. Options are left out: 13F reports them at the underlying's value.
13fpro.ai/research/fund/gagnon-securities-llc-1125725
GAGNON SECURITIES LLC 13F holdings — Q2 2026
$518.8M portfolio (+19.8% QoQ) · 83 holdings · Q2 2026 13F · top 10 are 48% of the stock portfolio
$50.5M
9.7% of stocks
+0.5%This quarter+55.0%Since filed10+ qtrsHeld$36.0M
6.9% of stocks
+73%This quarter-10.3%Since filed10+ qtrsHeldAIQuality35.6#2,289Est. buyEstimated buy price is Pro: unlock with a free trialAdded 2 qtrs in a row$27.9M
5.4% of stocks
-3%This quarter-5.1%Since filed10+ qtrsHeld$22.8M
4.4% of stocks
-2%This quarter-22.4%Since filed10+ qtrsHeld$21.4M
4.1% of stocks
-2%This quarter-10.9%Since filed10+ qtrsHeld$18.8M
3.6% of stocks
-0.7%This quarter-1.5%Since filed10+ qtrsHeld$18.0M
3.5% of stocks
+155%This quarter-22.3%Since filed10+ qtrsHeldAIQualityAI quality score is Pro: unlock with a free trialEst. buyEstimated buy price is Pro: unlock with a free trialAdded 4 qtrs in a row$17.6M
3.4% of stocks
-1%This quarter+3.0%Since filed10+ qtrsHeld$17.4M
3.4% of stocks
-1%This quarter-5.4%Since filed10+ qtrsHeldAIQualityAI quality score is Pro: unlock with a free trialEst. buyEstimated buy price is Pro: unlock with a free trialTrimmed 2 qtrs in a row$17.2M
3.3% of stocks
+5%This quarter-4.9%Since filed10+ qtrsHeld
All holdings — GAGNON SECURITIES LLC (Q2 2026)
83 disclosed positions from the Form 13F-HR on SEC EDGAR, with quarter-over-quarter share changes. Largest by value first; the ten above are not repeated.
| # | Company | Held | Source | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 11 | Freshworks Inc. | Technology | $15.8M | 3.0% | 1.56M | -10% | 10+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 12 | Pacira BioSciences, Inc. | Healthcare | $15.4M | 3.0% | 609K | -1% | 10+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 13 | Five9, Inc. | Technology | $15.4M | 3.0% | 723K | +16% | 10+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 14 | Hinge Health, Inc. | Technology | $15.2M | 2.9% | 183K | +47% | 2 qtrsAdded 2 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 15 | BIOLIFE SOLUTIONS INC | Healthcare | $15.1M | 2.9% | 536K | -0.1% | 10+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 16 | Profound Medical Corp. | Healthcare | $13.0M | 2.5% | 1.96M | +0.8% | 10+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 17 | CarGurus, Inc. | Technology | $12.5M | 2.4% | 367K | +35% | 10+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 18 | TREACE MEDICAL CONCEPTS, INC. | Healthcare | $12.1M | 2.3% | 3.03M | -42% | 9 qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 19 | NOV Inc. | Energy | $11.7M | 2.3% | 765K | New | 1 qtr | AI quality score is Pro: unlock with a free trial | 13F | |
| 20 | INTUITIVE SURGICAL INC | Healthcare | $11.6M | 2.2% | 29K | -8% | 10+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 21 | BLACKLINE, INC. | Technology | $10.5M | 2.0% | 376K | +27% | 10+ qtrsAdded 2 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 22 | ASPEN AEROGELS INC | Consumer Discretionary | $9.7M | 1.9% | 1.54M | -18% | 5 qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 23 | Proto Labs Incadr | Industrials | $9.5M | 1.8% | 116K | +5% | 10+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 24 | Vertex, Inc. | Technology | $8.7M | 1.7% | 761K | +63% | 10+ qtrsAdded 2 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 25 | Amplitude, Inc. | Technology | $8.1M | 1.6% | 1.06M | -0.4% | 4 qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 26 | $HZO | MARINEMAX INC | Consumer Discretionary | $7.7M | 1.5% | 211K | -4% | |||
| 27 | $OSUR | ORASURE TECHNOLOGIES INC | Healthcare | $7.1M | 1.4% | 1.59M | -7% | |||
| 28 | $DV | DoubleVerify Holdings, Inc. | Technology | $5.7M | 1.1% | 523K | +7% | |||
| 29 | $CELC | Celcuity Inc. | Healthcare | $5.6M | 1.1% | 53K | -0.2% | |||
| 30 | $CMG | CHIPOTLE MEXICAN GRILL INC | Consumer Discretionary | $5.3M | 1.0% | 155K | -2% | |||
| 31 | $CTRE | CareTrust REIT, Inc. | Real Estate | $5.2M | 1.0% | 130K | -2% | |||
| 32 | $PNTG | Pennant Group, Inc. | Healthcare | $5.0M | 1.0% | 135K | -2% | |||
| 33 | — | WHITECAP RES INC - COM NEW | — | $4.5M | 0.9% | 435K | -0.1% | |||
| 34 | $ICUI | ICU MEDICAL INC/DE | Healthcare | $4.3M | 0.8% | 29K | -1% | |||
| 35 | $KLTR | KALTURA INC | Technology | $4.2M | 0.8% | 3.27M | -0.4% | |||
| 36 | $MCHP | MICROCHIP TECHNOLOGY INC | Technology | $2.4M | 0.5% | 26K | -2% | |||
| 37 | $GNTX | GENTEX CORP | Industrials | $1.4M | 0.3% | 57K | +0.4% | |||
| 38 | $GNL | Global Net Lease, Inc. | Real Estate | $1.4M | 0.3% | 161K | -6% | |||
| 39 | $SLG | SL GREEN REALTY CORP | Real Estate | $1.3M | 0.3% | 26K | — | |||
| 40 | $SAM | BOSTON BEER CO INC | Consumer Staples | $1.3M | 0.3% | 7,283 | +0.6% | |||
| 41 | $NCNO | nCino, Inc. | Technology | $1.2M | 0.2% | 75K | -5% | |||
| 42 | $FLG | FLAGSTAR BANK, NATIONAL ASSOCIATION | Financials | $1.1M | 0.2% | 74K | -0.3% | |||
| 43 | $APPS | Digital Turbine, Inc. | Financials | $1.1M | 0.2% | 82K | — | |||
| 44 | $WEAV | Weave Communications, Inc. | Technology | $999K | 0.2% | 157K | +359% | |||
| 45 | $DOCU | DOCUSIGN, INC. | Technology | $929K | 0.2% | 21K | -2% | |||
| 46 | $CNF | CNFinance Holdings Ltd. | Financials | $921K | 0.2% | 332K | +6% | |||
| 47 | $GOOGL | Alphabet Inc. | Technology | $913K | 0.2% | 2,556 | — | |||
| 48 | $MRVL | Marvell Technology, Inc. | Technology | $871K | 0.2% | 2,923 | -57% | |||
| 49 | $TECH | BIO-TECHNE Corp | Healthcare | $864K | 0.2% | 12K | +24% | |||
| 50 | $DVN | DEVON ENERGY CORP/DE | Energy | $786K | 0.1% | 19K | -0.2% | |||
| 51 | $MU | MICRON TECHNOLOGY INC | Technology | $784K | 0.1% | 679 | -37% | |||
| 52 | — | NINTENDO LTD - COM | — | $741K | 0.1% | 71K | +1% | |||
| 53 | $CGNX | COGNEX CORP | Technology | $710K | 0.1% | 9,798 | +0.2% | |||
| 54 | $NVDA | NVIDIA CORP | Technology | $700K | 0.1% | 3,498 | -4% | |||
| 55 | $CVLT | COMMVAULT SYSTEMS INC | Technology | $691K | 0.1% | 4,874 | +11% | |||
| 56 | $GOOG | Alphabet Inc. | Technology | $682K | 0.1% | 1,929 | -0.3% | |||
| 57 | $ONTO | ONTO INNOVATION INC. | Technology | $647K | 0.1% | 1,709 | -24% | |||
| 58 | $T | AT&T INC. | Communication Services | $640K | 0.1% | 31K | -4% | |||
| 59 | $HIMX | Himax Technologies, Inc. | Technology | $606K | 0.1% | 39K | -12% | |||
| 60 | $PFE | PFIZER INC | Healthcare | $562K | 0.1% | 23K | -47% | |||
| 61 | $LTH | Life Time Group Holdings, Inc. | Communication Services | $550K | 0.1% | 13K | -0.6% | |||
| 62 | $MTSI | MACOM Technology Solutions Holdings, Inc. | Technology | $487K | 0.1% | 1,281 | -65% | |||
| 63 | $VIAV | VIAVI SOLUTIONS INC. | Technology | $477K | 0.1% | 9,986 | -31% | |||
| 64 | $META | Meta Platforms, Inc. | Technology | $473K | 0.1% | 839 | — | |||
| 65 | $SHOP | SHOPIFY INC. | Technology | $459K | 0.1% | 4,023 | +2% | |||
| 66 | $ETSY | ETSY INC | Industrials | $434K | 0.1% | 5,755 | -0.3% | |||
| 67 | $SBUX | STARBUCKS CORP | Consumer Discretionary | $413K | 0.1% | 4,045 | -0.6% | |||
| 68 | $MRK | Merck & Co., Inc. | Healthcare | $410K | 0.1% | 3,187 | -0.2% | |||
| 69 | — | CES ENERGY SOLUTIONS CORP - COM | — | $390K | 0.1% | 33K | — | |||
| 70 | $AKAM | AKAMAI TECHNOLOGIES INC | Industrials | $374K | 0.1% | 3,163 | +9% | |||
| 71 | $WRBY | Warby Parker Inc. | Healthcare | $345K | 0.1% | 11K | New | |||
| 72 | $RNG | RingCentral, Inc. | Technology | $332K | 0.1% | 8,517 | +1% | |||
| 73 | $VCEL | Vericel Corp | Healthcare | $325K | 0.1% | 7,303 | New | |||
| 74 | $BYND | BEYOND MEAT, INC. | Consumer Staples | $286K | 0.1% | 381K | New | |||
| 75 | $PL | Planet Labs PBC | Technology | $277K | 0.1% | 8,352 | — | |||
| 76 | $ELVA | Electrovaya Inc. | Technology | $276K | 0.1% | 26K | +0.2% | |||
| 77 | $RNTX | Rein Therapeutics, Inc. | Healthcare | $238K | 0.1% | 229K | -4% | |||
| 78 | $RMBS | RAMBUS INC | Technology | $236K | 0.1% | 1,778 | -35% | |||
| 79 | $BX | Blackstone Inc. | Financials | $228K | 0.0% | 1,940 | — | |||
| 80 | $MSFT | MICROSOFT CORP | Technology | $207K | 0.0% | 556 | +2% | |||
| 81 | $ATNM | Actinium Pharmaceuticals, Inc. | Healthcare | $178K | 0.0% | 182K | -10% | |||
| 82 | $PTEN | PATTERSON UTI ENERGY INC | Energy | $160K | 0.0% | 17K | -94% | |||
| 83 | $RDHL | RedHill Biopharma Ltd. | Healthcare | $75K | 0.0% | 88K | — |
What changed in Q2 2026
Against the previous quarter's 13F: 4 new, 25 added to, 46 trimmed, 6 sold out. Share-count changes; largest moves by dollar size first.
New positions (4)
Added to (25)
now $36.0M · held 10+ qtrs, 2 adds in a row
now $18.0M · held 10+ qtrs, 4 adds in a row
now $15.2M · held 2 qtrs, 2 adds in a row
$VERXVertex, Inc.+63%
now $8.7M · held 10+ qtrs, 2 adds in a row
now $12.5M · held 10+ qtrs
$BLBLACKLINE, INC.+27%
now $10.5M · held 10+ qtrs, 2 adds in a row
+19 more in the Excel export
Trimmed (46)
now $12.1M · held 9 qtrs
$PTENPATTERSON UTI ENERGY INC-94%
now $160K · held 10+ qtrs, 2 trims in a row
$ASPNASPEN AEROGELS INC-18%
now $9.7M · held 5 qtrs
now $15.8M · held 10+ qtrs
$MRVLMarvell Technology, Inc.-57%
now $871K · held 10+ qtrs
now $11.6M · held 10+ qtrs
+40 more in the Excel export
Holdings by quarter
Every 13F GAGNON SECURITIES LLC has filed, 40 earlier quarters. Pick one to see what it held then.
Is it too late to follow GAGNON SECURITIES?
Q2 2026 13F filed with the SEC on Aug 5, 2026. Prices are closing prices as of Oct 27, 2026.
Average quality of GAGNON SECURITIES's top 20 holdings: 55/100 (our AI quality score, weighted by position size; 19 of the 20 are scored)
Top 10 since filing
+3.9%
Value-weighted move of the 10 largest stock positions
Turnover
12%
Last quarter; 36% over the last 4
Top 10 weight
48%
Share of the stock portfolio in its 10 largest positions
Held 4+ quarters
94%
Share of portfolio value in positions held a year or more
Highest-quality names it owns(among its 100 largest positions)
The 8 highest-scoring companies in this portfolio are a Pro feature.
How these are measured
- Moves since the quarter-end and since the filing date use our own daily closing prices, from the close on (or just before) each date to the latest close.
- Turnover is the lesser of shares bought or sold in a quarter, valued at the quarter-end prices in the 13F, divided by the average of the two quarters' stock portfolio values.
- Quarters held and add/trim streaks count back only through quarters whose filed holdings add up to the filing's own cover-page total (back to Q1 2024 for this fund). A change counts as an add or a trim when the split-adjusted share count moves by more than 1%.
- Estimate, not the fund's reported cost. For each quarter in the current holding period in which the fund's share count rose (split-adjusted), we take that quarter's average daily close and weight it by the shares added; sales do not change an average cost. Quarters where the stock's price history and the 13F's own implied price disagree by more than 2x are left out.
- Put and call option rows report the value of the underlying shares, not a position the fund paid for, so they are left out of all of the above.
Portfolio Overview
GAGNON SECURITIES LLC disclosed 83 positions worth $518.8M in its Form 13F-HR for Q2 2026, led by $CDNA (CareDx, Inc.) at 9.7% of the equity portfolio, followed by $WGS and $ENSG. During the quarter the fund opened 4 new positions and exited 6 — including a new stake in $NOV and a full exit from $NVGS. The portfolio is most concentrated in Healthcare (43.3% of disclosed assets). All figures are sourced directly from GAGNON SECURITIES LLC’s Form 13F-HR filing with the SEC under CIK 1125725.
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