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Latest GAGNON SECURITIES LLC Stock Portfolio

GAGNON SECURITIES LLC Performance:
2025 Q4: 1.27%YTD: 2.74%2024: 118.16%
Performance for 2025 Q4 is 1.27%, and YTD is 2.74%, and 2024 is 118.16%.

About GAGNON SECURITIES LLC and 13F Hedge Fund Stock Holdings

On 2026-02-13, the fund reported it's updated stock portfolio. In the 13F Holdings report, GAGNON SECURITIES LLC reported an equity portfolio of $491.1 Millions as of 31 Dec, 2025.

The top stock holdings of GAGNON SECURITIES LLC are CDNA, SMFR, AL. The fund has invested 6.8% of it's portfolio in CAREDX INC and 6.7% of portfolio in GENEDX HOLDINGS CORP.

The fund managers got completely rid off POWER SOLUTIONS INTL INC (PSIX) and BACKBLAZE INC (BLZE) stocks. They significantly reduced their stock positions in BOSTON BEER INC (SAM), MICRON TECHNOLOGY INC (MU) and ASPEN AEROGELS INC (ASPN). GAGNON SECURITIES LLC opened new stock positions in BLACKSTONE INC (BX) and AKAMAI TECHNOLOGIES INC (AKAM). The fund showed a lot of confidence in some stocks as they added substantially to REDHILL BIOPHARMA LTD (RDHL), GAMBLING COM GROUP LIMITED (GAMB) and FIVE9 INC (FIVN).

GAGNON SECURITIES LLC Annual Return Estimates Vs S&P 500

Our best estimate is that GAGNON SECURITIES LLC made a return of 1.27% in the last quarter. In trailing 12 months, it's portfolio return was 2.74%.
  • Performance
  • S&P 500

New Buys

Ticker$ Bought
blackstone inc227,357
akamai technologies inc219,870
New stocks bought by GAGNON SECURITIES LLC

Additions

Ticker% Inc.
redhill biopharma ltd383
gambling com group limited357
five9 inc108
ncino inc92.1
petmed express inc77.54
patterson-uti energy inc69.04
weave communications inc54.77
carmax inc41.86
Additions to existing portfolio by GAGNON SECURITIES LLC

Reductions

Ticker% Reduced
boston beer inc-70.45
micron technology inc-63.34
aspen aerogels inc-35.42
freshworks inc-34.08
shopify inc-31.08
doubleverify hldgs inc-27.69
intuitive surgical inc-26.67
air lease corp-17.94
GAGNON SECURITIES LLC reduced stake in above stock

Sold off

Ticker$ Sold
power solutions intl inc-6,361,710
backblaze inc-514,047
GAGNON SECURITIES LLC got rid off the above stocks

Sector Distribution

GAGNON SECURITIES LLC has about 32.2% of it's holdings in Healthcare sector.

Sector%
Healthcare32.2
Technology17.4
Industrials15.4
Consumer Cyclical10.8
Others8
6.7
Real Estate4.2
Energy4.2

Market Cap. Distribution

GAGNON SECURITIES LLC has about 26.5% of it's portfolio invested in the large-cap and mega-cap stocks.

Category%
MID-CAP33
SMALL-CAP28.3
LARGE-CAP24.8
UNALLOCATED8
MICRO-CAP4
MEGA-CAP1.7

Stocks belong to which Index?

About 63.6% of the stocks held by GAGNON SECURITIES LLC either belong to S&P 500 or RUSSELL 2000 index.

Index%
RUSSELL 200048
Others36.4
S&P 50015.6
Top 5 Winners (%)%
CELC
celcuity inc
101.4 %
EXAS
exact sciences corp
82.8 %
PROF
profound med corp
55.8 %
MU
micron technology inc
48.2 %
CNF
cnfinance hldgs ltd
44.4 %
Top 5 Winners ($)$
EXAS
exact sciences corp
8.1 M
CDNA
caredx inc
7.5 M
SMFR
genedx holdings corp
5.8 M
PROF
profound med corp
5.5 M
ISRG
intuitive surgical inc
4.5 M
Top 5 Losers (%)%
TMCI
treace med concepts inc
-60.0 %
ASPN
aspen aerogels inc
-48.8 %
RDHL
redhill biopharma ltd
-40.0 %
GDRX
goodrx hldgs inc
-35.9 %
CVLT
commvault sys inc
-33.4 %
Top 5 Losers ($)$
TMCI
treace med concepts inc
-11.4 M
ASPN
aspen aerogels inc
-6.0 M
AMRC
ameresco inc
-3.6 M
GNRC
generac hldgs inc
-2.4 M
FIVN
five9 inc
-1.9 M

GAGNON SECURITIES LLC Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of GAGNON SECURITIES LLC

GAGNON SECURITIES LLC has 86 stocks in it's portfolio. About 48.2% of the portfolio is in top 10 stocks. TMCI proved to be the most loss making stock for the portfolio. EXAS was the most profitable stock for GAGNON SECURITIES LLC last quarter.

Last Reported on: 13 Feb, 2026
TickerNamesorted ascending% PortfolioShares Held$ ValueType% ChangeOptions