GAGNON SECURITIES LLC

Q2 2026 13F-HR Holdings

Location
New York, NY
Holdings as of
6/30/2026
Date filed
8/4/2026
Form type
13F-HR
Num holdings
85
Total value ($000)
$518,827
Net value change ($000)
+85,619 (19.8%)
New positions
3
Sold out positions
6
Turnover %
6.3%
Sector allocation + QoQ delta (equities-only)
Prev filing: 4/21/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q1 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 19,880 65.0%
WGS 16,564 85.1%
QDEL 11,420 172.3%
HNGE 10,395 217.0%
GNRC 6,792 46.4%
FIVN 5,971 63.3%
CAKE 5,320 43.2%
TMCI 5,087 73.0%
BLFS 4,897 47.8%
KMX 4,334 33.7%
Top Reduces (Value $000, Stocks/ETFs)
NVGS -17,139 -100.0%
SGOV -9,331 -100.0%
ENSG -8,326 -23.0%
AOSL -3,720 -100.0%
PTEN -3,248 -95.3%
ISRG -2,986 -20.5%
EPD -690 -3.5%
PFE -681 -54.8%
CELC -518 -8.5%
GAMB -426 -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