GAGNON SECURITIES LLC

Q4 2025 13F-HR Holdings

Location
New York, NY
Holdings as of
12/31/2025
Date filed
2/13/2026
Form type
13F-HR
Num holdings
86
Total value ($000)
$491,087
Net value change ($000)
-7,416 (-1.5%)
New positions
2
Sold out positions
2
Turnover %
1.5%
Sector allocation + QoQ delta (equities-only)
Prev filing: 11/3/2025 Next filing: 4/21/2026 SEC filing

Snapshot: Change Analysis

Compared to Q3 2025
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 8,293 33.0%
EXAS 7,186 73.2%
PROF 6,825 80.5%
FIVN 5,300 73.1%
WGS 3,986 13.8%
CELC 2,661 99.8%
AMPL 2,618 47.8%
KMX 2,244 22.2%
NVGS 1,515 11.3%
PCRX 1,382 11.9%
Top Reduces (Value $000, Stocks/ETFs)
ASPN -9,007 -73.7%
TMCI -7,532 -49.7%
FRSH -6,893 -31.4%
AL -6,628 -17.2%
PSIX -6,362 -100.0%
AMRC -4,464 -15.5%
SAM -3,307 -72.7%
GNRC -2,675 -20.6%
DV -2,520 -30.9%
VERX -2,106 -22.4%
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