GAGNON SECURITIES LLC

Q3 2025 13F-HR Holdings

Location
New York, NY
Holdings as of
9/30/2025
Date filed
11/3/2025
Form type
13F-HR
Num holdings
86
Total value ($000)
$498,503
Net value change ($000)
+6,145 (1.2%)
New positions
9
Sold out positions
10
Turnover %
3.7%
Sector allocation + QoQ delta (equities-only)
Prev filing: 7/23/2025 Next filing: 2/13/2026 SEC filing

Snapshot: Change Analysis

Compared to Q2 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)
AMRC 15,640 118.3%
FRSH 8,175 59.3%
HZO 6,620 NEW
AMPL 5,475 NEW
WGS 3,951 15.8%
GNRC 3,219 33.0%
PCRX 2,785 31.6%
DV 2,681 49.1%
BLFS 2,038 17.5%
CELC 1,944 269.6%
Top Reduces (Value $000, Stocks/ETFs)
PSIX -15,733 -71.2%
ISRG -9,858 -33.7%
CDNA -5,120 -16.9%
EXAS -4,998 -33.7%
AL -4,526 -10.5%
CAKE -3,641 -22.7%
FIVN -3,543 -32.8%
CMG -3,511 -42.7%
PROF -1,849 -17.9%
CNF -1,259 -100.0%
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