Stocks/Funds/CIK 1125725

GAGNON SECURITIES LLC

market makerlong-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 1125725
Assets
$433M
-4.7% YoY
Holdings
85
Lifetime alpha vs market
-35.09% annual
Average hold time
4.9 yr
median 4.3 yr

Quarterly history

Cum return -73% vs S&P +52% · α -125% lifetimeAUM $433M · peak $704MFlow $-24M (-5%)2016-062017-122019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
+2.54%
adds when stocks drop
when a holding falls −10%+
Middle response
-3.41%
baseline attrition
Rally response
-4.99%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
ENSGThe Ensign Group, Inc.$36M8.4%+55.9%8.0 yr
CDNACareDx, Inc$31M7.1%-2.2%10.5 yr
AMRCAmeresco, Inc.$21M4.9%+111.1%10.5 yr
WGSGeneDx Holdings Corp.$19M4.5%-27.5%3.0 yr
EPDEnterprise Products Part$19M4.5%+18.7%8.5 yr
NVGSNavigator Holdings Ltd.$17M4.0%+46.8%10.3 yr
EQIXEquinix, Inc.$17M3.8%+23.0%9.5 yr
GNRCGenerac Holdings Inc.$15M3.4%+54.2%10.5 yr
ISRGIntuitive Surgical, Inc.$15M3.4%-6.9%8.0 yr
PCRXPacira BioSciences, Inc.$14M3.2%-9.1%7.0 yr
FRSHFreshworks Inc.$14M3.2%-43.1%4.8 yr
KMXCarMax, Inc.$13M3.0%-46.6%10.5 yr
PROFProfound Medical Corp.$13M2.9%+11.3%6.3 yr
CAKEThe Cheesecake Factory I$12M2.8%+14.8%8.5 yr
BLBlackLine, Inc.$11M2.5%-23.6%7.8 yr

Portfolio composition (YoY)

Industry mix
Software - Application12.8%-0.1pp$55M
Medical - Care Facilities9.3%+2.2pp$40M
Oil & Gas Midstream8.4%+2.3pp$37M
Medical - Devices7.9%-4.3pp$34M
Medical - Diagnostics & Research7.1%-1.1pp$31M
Medical - Instruments & Supplies6.0%+0.8pp$26M
Medical - Healthcare Information Services5.6%-0.0pp$24M
Auto - Dealerships5.1%+0.3pp$22M
Engineering & Construction4.9%+2.4pp$21M
Restaurants4.1%-0.5pp$18M
Country
US91.0%-1.0pp
CA4.2%+1.3pp
GB4.0%+1.5pp
Unknown0.4%-1.4pp
JP0.2%-0.0pp
JE0.1%+0.0pp
TW0.1%-0.0pp
Top 5: 29.3% · Top 10: 47.1% · Top 25: 79.5%

Winners

TickerPrev $PnLYoY %
ENSG$28M+0.02B55.9%
AMRC$12M+0.01B111.1%
CELC$1M+0.01B1029.0%
NVGS$11M+0.01B46.8%
GNRC$8M+0.00B54.2%

Losers

TickerPrev $PnLYoY %
TMCI$15M-0.01B-84.0%
WGS$25M-0.01B-27.5%
VERX$9M-0.01B-66.0%
KMX$12M-0.01B-46.6%
FRSH$12M-0.01B-43.1%

Top buys this quarter · 15

HNGE Hinge Health, Inc.new+$5M
FRSH Freshworks Inc.+$14M
QDEL QuidelOrtho Corporation+$4M
WGS GeneDx Holdings Corp.+$19M
TMCI Treace Medical Concepts, Inc.+$7M
PCRX Pacira BioSciences, Inc.+$3M
ASPN Aspen Aerogels, Inc.+$2M
AMPL Amplitude, Inc.+$7M
VERX Vertex, Inc.+$6M
DOCU DocuSign, Inc.new+$1M

Top sells this quarter · 15

AL Air Lease Corporationexit$32M
EXAS Exact Sciences Corporationexit$17M
TPR Tapestry, Inc.exit$3M
NVDA NVIDIA Corporation$3M
HZO MarineMax, Inc.$3M
XOM Exxon Mobil Corporationexit$1M
AOSL Alpha and Omega Semiconductor $1M
WCP.TO Whitecap Resources Inc.$4M
EPD Enterprise Products Partners L$17M
KMX CarMax, Inc.$12M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$433M85+10.22%+17.59%-7.37%-0.02B
2025-12-31$491M86+5.93%+17.72%-11.79%-0.02B
2025-09-30$499M86+11.33%+17.52%-6.19%-0.02B
2025-06-30$492M87+19.50%+14.94%+4.56%-0.01B
2025-03-31$455M98+10.05%+8.30%+1.75%+0.01B
2024-12-31$496M91+24.36%+24.89%-0.53%-0.04B
2024-09-30$504M102+19.17%+36.04%-16.87%+0.00B
2024-06-30$444M97-0.39%+24.49%-24.88%+0.01B
2024-03-31$423M97+5.16%+29.62%-24.46%+0.00B
2023-12-31$417M102+6.69%+26.18%-19.49%+0.01B
2023-09-30$399M97-24.14%+21.57%-45.71%-0.05B
2023-06-30$481M97-40.91%+19.42%-60.33%-0.03B
2023-03-31$476M112-78.82%-7.82%-71.01%+0.03B
2022-12-31$437M99-27.21%+7.56%-34.77%+0.11B
2022-09-30$455M101-26.55%-4.93%-21.62%+0.10B
2022-06-30$477M101-61.41%-16.11%-45.30%+0.24B