Gagnon Securities LLC

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Gagnon Securities LLC
CRD #103727
SEC #801-64836
CIK #0001125725
AUM 529.7 M (2026-05-04)
Employees 19 (53% Investors, 100% Brokers)
Phone212-554-5000
Address1370 6th Avenue
New York, NY 10019
Source [IAPD] [EDGAR] [Website] [LinkedIn]
Total AUM ($M)
1300104078052026002004201120192027
Sector Form 13F Holdings Value ($M)
Ensign Group Inc 36.2
CareDx Inc 30.6
Ameresco Inc 21.4
CM Life Sciences Inc 19.5
Enterprise Products Partners L P 19.5
Navigator Holdings Ltd 17.1
Equinix Inc 16.6
Generac Holdings Inc 14.6
Intuitive Surgical Inc 14.6
Pacira Pharmaceuticals Inc 14.0
View All
Holdings by Sector ($M)
80064048032016002011201620212027
AUM Breakdown Accounts AUM ($M)
By Client Type
(a) Individuals (other than high net worth individuals) 1,025 247.6
(b) Individuals (high net worth individuals) 33 224.2
(c) Banking or thrift institutions 0 0.0
(d) Investment companies 0 0.0
(e) Business development companies 0 0.0
(f) Pooled investment vehicles 0 0.0
(g) Pension and profit sharing plans 0 0.0
(h) Charitable organizations 0 0.0
(i) State or municipal government entities 0 0.0
(j) Other investment advisers 0 0.0
(k) Insurance companies 0 0.0
(l) Sovereign wealth funds and foreign official institutions 0 0.0
(m) Corporations or other businesses not listed above 144 58.0
(n) Other 0 0.0
Total 1,202 529.7
By Discretionary
Discretionary 1,202 529.7
Non-Discretionary 0 0.0
Total 1,202 529.7
By Non-United States Persons
Non-United States Persons 0.8
United States Persons 528.9
Total 1,202 529.7
EDGAR Form CIK 2011 - 2026
13F-HR [0001125725]
SC 13D [0001125725]
SC 13G [0001125725]
Form 13D/13G Filer Form 13D/13G Subject Filed
Gagnon Securities LLC Orasure Technologies Inc [2026-04-08]
Gagnon Securities LLC Orasure Technologies Inc [2025-11-17]
Gagnon Securities LLC CareDx Inc [2025-07-24]
Gagnon Securities LLC Treace Medical Concepts Inc [2025-05-15]
Gagnon Securities LLC CareDx Inc [2023-03-13]
Gagnon Securities LLC CM Life Sciences II Inc [2021-04-08]
Gagnon Securities LLC Profound Medical Corp [2020-02-13]
Gagnon Securities LLC Alpha & Omega Semiconductor Ltd [2018-05-25]
Gagnon Securities LLC SecureWorks Corp [2017-08-10]
Gagnon Securities LLC General Finance Corp [2017-01-24]
View All
Firm Profile (Form ADV)
Discretionary AUM$0.1B
Clients1
ServesRetail
Related Firms State AUM
Gagnon Securities LLC
NY 529.7 M
Gagnon Advisors LLC
NY 187.3 M
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CA 532.1 M
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MA 529.8 M
Denver Wealth Management Inc
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Sa Mason LLC
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Peterson Wealth Services Inc
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Noble Family Wealth LLC
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Compass Financial Advisory Services LLC
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Core Planning LLC
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