GAGNON SECURITIES LLC
Q3 2024 Form 13-F
NEW YORK, NEW YORK
CIK 0001125725
· CRD 103727
· SEC-registered investment adviser
$504.4M Reported Value Total
GAGNON SECURITIES, LLC reports 1,203 total accounts under management (AUM). There are 1,203 discretionary accounts valued at $545,317,238, and 0 non-discretionary accounts.
Source: Form ADV filed * Note that certain holdings are exempt from Form 13-F reporting, so the AUM totals may be greater than the Form 13-F total.
Source: Form ADV filed 2026-08-12
Reported value
$504.4M
Quarter over quarter
+17.9%
Holdings
102
Top-10 concentration
49.3%
Key People
Form ADV owners & control persons
Neil Joseph Gagnon
MANAGER/CEO
Maureen Oneill Drew
MEMBER
Brian Joseph Gagnon
MEMBER
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Coverage begins with the second quarter of 2013. Earlier quarters are not shown while their accuracy is being verified.
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Q3 2024 13F record
Q3 2024 13F filing summary
| Period of report | September 30, 2024 |
|---|---|
| Filed | November 12, 2024 |
| Form | 13F-HR |
| Reported value | $504.4M |
| Positions | 102 |
| Change in reported value | +13.6% |
| New positions | 11 |
| Exited positions | 6 |
| Position turnover | 15.7% |
| Top-10 concentration | 49.3% |
13F filings by quarter
| Quarter | Positions | Value |
|---|---|---|
|
Q3 2026 13F
Filed Nov 5, 2026
|
84 | $576.5M |
|
Q2 2026 13F
Filed Aug 5, 2026
|
82 | $507.1M |
|
Q1 2026 13F
Filed Apr 22, 2026
|
85 | $433.2M |
|
Q4 2025 13F
Filed Feb 13, 2026
|
86 | $491.1M |
|
Q3 2025 13F
Filed Nov 3, 2025
|
86 | $498.5M |
|
Q2 2025 13F
Filed Jul 23, 2025
|
87 | $492.4M |
|
Q1 2025 13F
Filed May 9, 2025
|
98 | $454.5M |
|
Q4 2024 13F
Filed Jan 24, 2025
|
91 | $496.3M |
|
Q3 2024 13F
Filed Nov 12, 2024
|
102 | $504.4M |
|
Q2 2024 13F
Filed Aug 14, 2024
|
97 | $444.0M |
|
Q1 2024 13F
Filed May 13, 2024
|
98 | $422.5M |
|
Q4 2023 13F
Filed Feb 14, 2024
|
102 | $416.6M |
|
Q3 2023 13F
Filed Nov 14, 2023
|
97 | $399.1M |
|
Q2 2023 13F
Filed Aug 8, 2023
|
97 | $480.9M |
|
Q1 2023 13F
Filed Apr 10, 2023
|
112 | $475.8M |
|
Q4 2022 13F
Filed Feb 7, 2023
|
105 | $452.9M |
|
Q3 2022 13F
Filed Nov 14, 2022
|
101 | $454.8M |
|
Q2 2022 13F
Filed Aug 1, 2022
|
101 | $477.1M |
|
Q1 2022 13F
Filed May 9, 2022
|
103 | $613.2M |
|
Q4 2021 13F
Filed Feb 8, 2022
|
104 | $666.8M |
34 earlier quarters on file — choose one from the quarter menu above.
Top 20 holdings · Q3 2024
| # | Holding | Reported value | % of portfolio |
|---|---|---|---|
| 1 | CDNA CAREDX INC | $44.9M | 8.9% |
| 2 | ENSG ENSIGN GROUP INC | $33.8M | 6.7% |
| 3 | AL AIR LEASE CORP | $33.2M | 6.59% |
| 4 | ISRG INTUITIVE SURGICAL INC | $30.5M | 6.05% |
| 5 | WGS GENEDX HOLDINGS CORP | $23.0M | 4.56% |
| 6 | PSIX POWER SOLUTIONS INTL INC | $21.0M | 4.15% |
| 7 | AMRC AMERESCO INC | $17.7M | 3.51% |
| 8 | EXAS EXACT SCIENCES CORP | $15.9M | 3.15% |
| 9 | EPD ENTERPRISE PRODS PARTNERS L P | $14.6M | 2.89% |
| 10 | BLFS BIOLIFE SOLUTIONS INC | $14.3M | 2.83% |
| 11 | SCWX SECUREWORKS CORP | $13.2M | 2.62% |
| 12 | NVGS NAVIGATOR HLDGS LTD | $12.8M | 2.53% |
| 13 | CARG CARGURUS INC | $12.5M | 2.47% |
| 14 | KMX CARMAX INC | $12.3M | 2.44% |
| 15 | PROF PROFOUND MED CORP | $11.7M | 2.32% |
| 16 | EQIX EQUINIX INC | $11.4M | 2.27% |
| 17 | FRSH FRESHWORKS INC | $10.6M | 2.09% |
| 18 | TMCI TREACE MED CONCEPTS INC | $10.3M | 2.04% |
| 19 | BL BLACKLINE INC | $10.2M | 2.02% |
| 20 | FIVN FIVE9 INC | $9.5M | 1.89% |
Values as reported on the Q3 2024 Form 13F. Every position is in the holdings table below.