Data as of Q4 2025 (Dec 31, 2025)

GAGNON SECURITIES LLC

โ€ขCIK: 1125725โ€ขFiling: Q4 2025

**GAGNON SECURITIES LLC** manages $491M across a concentrated portfolio of 86 positions. The fund exhibits significant exposure to technology and healthcare, highlighted by top holdings including CDNA at $33.4M and WGS at $33.0M. Further notable allocations include AL ($31.9M) and ENSG ($31.5M), indicating targeted conviction in specific growth sectors. This structure suggests a high-conviction, deep-value approach within its investment mandate.

Total AUM
$491.1M
QoQ Performance
-1.5%
Positions
85
Top 10 Concentration
48.2%
Latest Filing
Q4 2025

Top Holdings Allocation

CDNA
WGS
AL
ENSG
CDNA6.8%
WGS6.7%
AL6.5%
ENSG6.4%
AMRC5.0%
ISRG3.7%
EXK3.5%
EPD3.4%

๐Ÿ“ˆ Biggest Buys

FIVN
FIVE9 INC
+109.0%
2.6% of portfolio
KMX
CARMAX INC
+41.9%
2.5% of portfolio
AMPL
AMPLITUDE INC
+36.8%
1.6% of portfolio
TMCI
TREACE MED CONCEPTS INC
+37.7%
1.6% of portfolio
PRN
PROFOUND MED CORP
+12.2%
3.1% of portfolio

๐Ÿ“‰ Biggest Sells

FRSH
FRESHWORKS INC
-34.1%
3.1% of portfolio
AL
AIR LEASE CORP
-17.9%
6.5% of portfolio
ISRG
INTUITIVE SURGICAL INC
-26.7%
3.7% of portfolio
SAM
BOSTON BEER INC
-70.5%
0.3% of portfolio
DV
DOUBLEVERIFY HLDGS INC
-27.7%
1.1% of portfolio

Sector Breakdown

Other94.2%
Real Estate2.7%
Consumer1.3%
Technology1.2%
Healthcare0.3%
Energy0.2%
Communication0.2%

๐Ÿšช Exited Positionssold since Q3 2025

PSIX
POWER SOLUTIONS INTL INC
SOLD
$6.4M
BLZE
BACKBLAZE INC
SOLD
$514.0K

Changes from Q3 2025

NEW2 new positions
โ†‘33 increased
โ†“40 decreased

Historical Filings

Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023