GAGNON SECURITIES LLC

Q3 2026 13F-HR Holdings

Location
New York, NY
Holdings as of
9/30/2026
Date filed
11/5/2026
Form type
13F-HR
Num holdings
84
Total value ($000)
$576,507
Net value change ($000)
+57,680 (11.1%)
New positions
8
Sold out positions
6
Turnover %
6.0%
Sector allocation + QoQ delta (equities-only)
Prev filing: 8/4/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q2 2026
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
CDNA 19,370 38.4%
NVGS 14,083 NEW
BKD 8,005 NEW
BV 7,484 NEW
AMPL 6,154 76.2%
BLFS 5,538 36.6%
CAKE 5,079 28.8%
FRSH 4,160 26.3%
FIVN 3,870 25.1%
VERX 3,575 40.9%
Top Reduces (Value $000, Stocks/ETFs)
GNRC -5,555 -25.9%
QDEL -4,360 -24.2%
AMRC -4,248 -18.6%
HZO -2,347 -30.3%
CELC -1,330 -23.9%
ASPN -1,200 -12.3%
PROF -1,141 -8.8%
CARG -1,029 -8.2%
TECH -864 -100.0%
EQIX -789 -4.5%
Instrument mix + QoQ Δ (ex-options)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type