DOSSIER · 13F-HR · Q2 2026

Gagnon Advisors, LLC

$151M in tracked AUM across 22 positions as of Q2 2026.

GA
CIK 0001599466 · last filed Jun 30, 2026
Total AUM
$151M
as of Q2 2026
Holdings
22
positions
Whale Score
64
64
tracked
Activity
no data
changes this Q
AI Analysis · Q2 2026
Comprehensive Analysis of Gagnon Advisors, LLC SEC 13F Filing
Portfolio Overview

For the reporting period ending September 30, 2025, Gagnon Advisors, LLC managed a total portfolio value of approximately $106.72 million across 17 holdings. This represents a significant decrease in assets under management (AUM) of -28.3% compared to the previous quarter's value of $148.81 million. The reduction in portfolio value is likely attributable to a combination of market depreciation and ...

The portfolio exhibits a highly concentrated strategy. The top ten positions account for approximately 84.3% of the total portfolio value, with the largest single holding, GeneDx Holdings (WGS), constituting 12.83%. This suggests a high-conviction approach where capital is allocated selectively to a limited number of names. The firm's strategy appears to be mid-cap focused, with significant exposure to growth-oriented sectors such as technology and healthcare.

Key Holdings

The portfolio is anchored by WGS (GENEDX HOLDINGS CORP), which is the largest position at $13.69 million (12.83% allocation). This heavy weighting indicates strong conviction in the healthcare diagnostics or genetics space. The second and third largest holdings, Air Lease Corp ($12.51M, 11.72%) and Equinix Inc (EQIX) ($8.39M, 7.86%), provide diversification into industrial leasing and data center infrastructure, respectively.

Analysis generated by 13F Insight from SEC Form 13F filing data · Q2 2026. Methodology

Quarter at a glance — Q2 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q2 2026.

#HoldingValueSharesWeight
01
CDNA
CAREDX INC
$16M547K10.3%
02
AMRC
AMERESCO INC
$13M473K8.6%
03
EPD
ENTERPRISE PRODS PARTNERS L P
$12M340K8.3%
04
WGS
GENEDX HOLDINGS CORP
$12M178K8.1%
05
EQIX
EQUINIX INC
$11M11K7.4%
06
HNGE
HINGE HEALTH INC
$9M113K6.2%
07
PCRX
PACIRA BIOSCIENCES INC
$9M353K5.9%
08
FRSH
FRESHWORKS INC
$8M776K5.2%
09
BLFS
BIOLIFE SOLUTIONS INC
$8M274K5.1%
10
FIVN
FIVE9 INC
$7M336K4.7%

Filing history

2026Q2Jun 30
$151M 11.2%
22 positionsView →
2026Q1Mar 31
$136M 13.7%
22 positionsView →
2025Q4Dec 31
$158M 47.6%
23 positionsView →
2025Q3Sep 30
$107M 28.3%
17 positionsView →
2025Q2Jun 30
$149M 38.6%
24 positionsLocked
2025Q1Mar 31
$107M 31.3%
22 positionsLocked
2024Q4Dec 31
$156M 0.9%
26 positionsLocked
2024Q3Sep 30
$155M 17.9%
27 positionsLocked
2024Q2Jun 30
$131M 14.0%
27 positionsLocked
2024Q1Mar 31
$115M 0.7%
27 positionsLocked
2023Q4Dec 31
$114M 4.2%
26 positionsLocked
2023Q3Sep 30
$120M 20.0%
28 positionsLocked
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