# EDGAR Filing Document

**Accession Number:** 0001100967
**File Stem:** 0001100967-26-000005
**Filing Date:** 2026-3
**Character Count:** 2484
**Document Hash:** 5a69997559cf9533acccf21d09796df3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001100967-26-000005.hdr.sgml**: 20260303

**ACCESSION NUMBER**: 0001100967-26-000005

**CONFORMED SUBMISSION TYPE**: X-17A-5

**CONFIRMING COPY**: 

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260303

**DATE AS OF CHANGE**: 20260303

**PERIOD START**: 20250101

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** GAGNON SECURITIES, LLC
- **CENTRAL INDEX KEY:** 0001100967

**ORGANIZATION NAME:**
- **EIN:** 134087058
- **STATE OF INCORPORATION:** DE

**FILING VALUES:**
- **FORM TYPE:** X-17A-5
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 008-52218

**BUSINESS ADDRESS:**
- **STREET 1:** 1370 AVENUE OF THE AMERICAS
- **STREET 2:** 26TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10019
- **BUSINESS PHONE:** 212-554-5060

**MAIL ADDRESS:**
- **STREET 1:** 1370 AVENUE OF THE AMERICAS
- **STREET 2:** 26TH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10019

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** GAGNON SECURITIES LLC                                   /BD
- **DATE OF NAME CHANGE:** 19991214

### Attached PDF Documents

**Attachment 1:** `Public.pdf`

_No text found in this document._

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM X-17A-5

### ANNUAL AUDITED REPORT

### Filer Information

**Filer CIK:** 0001100967

**Filer CCC:** XXXXXXXX

**Is this a LIVE or TEST filing?:** LIVE

**Would you like a Return Copy?:** Yes

### Submission Information

**Report Period Begin Date:** 01-01-2025

**Report Period End Date:** 12-31-2025

**Type of Registrant:** Broker-dealer

**Any material weaknesses identified?:** No

### Registrant Identification

**Name of Broker-Dealer:** GAGNON SECURITIES, LLC

**Business Address:** 1370 AVENUE OF THE AMERICAS, 26TH FLOOR, NEW YORK, NY, 10019

**Contact Person:** Marianne D'Alessandro

**Contact Phone:** 212-554-5081

### Independent Public Accountant Identification

**Accountant Name:** EisnerAmper LLP

**Accountant Address:** 733 Third Avenue, New York, NY, 10017

**Accountant Type:** Certified Public Accountant

### OATH OR AFFIRMATION

I, **Marianne D'Alessandro**, swear (or affirm) that, to the best of my knowledge and belief, the accompanying financial statements and supporting schedules pertaining to the firm of **GAGNON SECURITIES, LLC**, as of **12-31-2025**, are true and correct.

**Signature:** Marianne D'Alessandro

**Title:** Chief Financial Officer