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GAGNON SECURITIES, LLC

NEW YORK, NY · CRD 103727 · IAPD ↗ · gagnonsec.com · 212-554-5000

$529.7MRegulatory AUM
10Advisory reps
19Employees
1Clients
0Planning clients
0Private funds
48States
3Disclosures
wealthSegment
ApprovedSEC status

Filing changes

47
March 2026 — GAGNON SECURITIES, LLC notice-filed in KS, SD.
Notice-filed in new state(s): the firm is taking clients somewhere new.
ComplianceMarketing & brand
70
April 2025 — GAGNON SECURITIES, LLC crossed $500M in regulatory AUM ($438.0M -> $545.3M).
Regulatory AUM crossed $500M.
Portfolio / reporting / TAMPCRMIntegration & migration consulting

Data: SEC Form ADV monthly roster (public). Confirm on IAPD before acting.