{
  "crd_number": 103727,
  "slug": "gagnon-securities-llc-new-york-ny-103727",
  "primary_business_name": "GAGNON SECURITIES, LLC",
  "legal_name": "GAGNON SECURITIES, LLC",
  "dbas": [],
  "city": "New York",
  "state": "NY",
  "country": "United States",
  "cbsa_code": "35620",
  "metro": {
    "cbsa_code": "35620",
    "common_name": "New York",
    "msa_name": "New York-Newark-Jersey City, NY-NJ",
    "path": "/advisors/ny/new-york"
  },
  "registration_type": "sec",
  "registration_status": "Approved",
  "registration_date": "2005-10-21",
  "years_registered": 20,
  "period": "2026-10-01",
  "filing_date": "2026-08-12",
  "carried_forward": false,
  "raum_total": 529713650.0,
  "raum_discretionary": 529713650.0,
  "raum_non_discretionary": 0.0,
  "raum_band": "500m_1b",
  "raum_band_label": "$500 million to $1 billion",
  "total_employees": 19,
  "advisory_employees": 10,
  "client_count_bucket": null,
  "clients_by_type": {
    "individuals": {
      "raum": 247565175.0,
      "count": 1025
    },
    "high_net_worth_individuals": {
      "raum": 224168211.0,
      "count": 33
    },
    "corporations_other_businesses": {
      "raum": 57980264.0,
      "count": 144
    }
  },
  "compensation_types": [
    "commissions",
    "percentage_of_aum"
  ],
  "advisory_activities": [
    "portfolio_management_individuals"
  ],
  "wrap_fee_participant": false,
  "disclosure_yes_count": 3,
  "states_registered": [
    "AL",
    "AR",
    "AZ",
    "CA",
    "CO",
    "CT",
    "DC",
    "FL",
    "GA",
    "IA",
    "ID",
    "IL",
    "IN",
    "KS",
    "KY",
    "LA",
    "MA",
    "MD",
    "ME",
    "MI",
    "MN",
    "MO",
    "MS",
    "MT",
    "NC",
    "ND",
    "NE",
    "NH",
    "NJ",
    "NM",
    "NV",
    "NY",
    "OH",
    "OK",
    "OR",
    "PA",
    "RI",
    "SC",
    "SD",
    "TN",
    "TX",
    "UT",
    "VA",
    "VI",
    "VT",
    "WA",
    "WI",
    "WY"
  ],
  "websites": [
    "https://gagnonsec.com",
    "https://linkedin.com/company/gagnon-securities/posts?feedView=all"
  ],
  "iapd_url": "https://adviserinfo.sec.gov/firm/summary/103727",
  "disclosure_items": [
    {
      "item": "11.C(2)",
      "question": "Has the SEC or the CFTC ever found that the firm or an advisory affiliate was involved in a violation of SEC or CFTC regulations or statutes?"
    },
    {
      "item": "11.C(4)",
      "question": "Has the SEC or the CFTC ever entered an order against the firm or an advisory affiliate in connection with investment-related activity?"
    },
    {
      "item": "11.C(5)",
      "question": "Has the SEC or the CFTC ever imposed a civil money penalty on the firm or an advisory affiliate, or ordered the firm or an advisory affiliate to cease and desist from an activity?"
    }
  ],
  "city_as_filed": "NEW YORK",
  "url": "https://advisorcensus.com/firm/gagnon-securities-llc-new-york-ny-103727",
  "display_name": "Gagnon Securities, LLC",
  "summary": "Gagnon Securities, LLC is an SEC-registered investment advisory firm in New York, NY, registered since 2005, reporting $500 million to $1 billion in regulatory assets under management in its Form ADV filing dated August 12, 2026.",
  "citation": "AdvisorCensus. Gagnon Securities, LLC (CRD 103727): Form ADV filing data as of October 2026.",
  "registration_type_label": "SEC-registered investment adviser",
  "compensation_labels": [
    "A percentage of assets under your management",
    "Commissions"
  ],
  "advisory_activity_labels": [
    "Portfolio management for individuals and/or small businesses"
  ],
  "quick_answers": [
    {
      "q": "How is Gagnon Securities, LLC compensated?",
      "a": "On its Form ADV (Item 5.E, October 2026), Gagnon Securities, LLC reports these compensation arrangements: a percentage of assets under its management; commissions. The amounts are in Item 5 of its Form ADV Part 2A brochure."
    },
    {
      "q": "Where is Gagnon Securities, LLC located?",
      "a": "Gagnon Securities, LLC's principal office is in New York, NY, according to its Form ADV."
    },
    {
      "q": "Is Gagnon Securities, LLC registered with the SEC or a state?",
      "a": "Gagnon Securities, LLC is an SEC-registered investment advisory firm, registered since 2005. Status as filed: Approved. CRD 103727."
    },
    {
      "q": "How much does Gagnon Securities, LLC manage?",
      "a": "Gagnon Securities, LLC reports $529,713,650 in regulatory assets under management in its Form ADV filing dated August 12, 2026 (100% discretionary)."
    },
    {
      "q": "How have Gagnon Securities, LLC's assets and staff changed since 2021?",
      "a": "In the Form ADV data for Gagnon Securities, LLC: Regulatory assets under management: $784,631,376 in the October 2021 data and $529,713,650 in the October 2026 data, down 32%. Total employees: 23 in October 2021 and 19 in October 2026. Assets under management move with markets as well as with clients coming and going."
    },
    {
      "q": "What types of clients does Gagnon Securities, LLC serve?",
      "a": "By number of clients on Form ADV Item 5.D: individuals (other than high net worth individuals) (1,025); corporations or other businesses not listed above (144); high net worth individuals (33)."
    },
    {
      "q": "Which custodians does Gagnon Securities, LLC use?",
      "a": "Gagnon Securities, LLC's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists National Financial Services LLC as a custodian holding 10% or more of its separately managed account assets."
    },
    {
      "q": "Does Gagnon Securities, LLC report any disciplinary disclosures?",
      "a": "Reports 3 disclosure items on Form ADV Item 11: yes answers to 11.C(2) (SEC or CFTC finding of a violation), 11.C(4) (SEC or CFTC order), and 11.C(5) (SEC or CFTC civil money penalty or cease-and-desist order). Each question covers the firm and its advisory affiliates, and one event can produce several yes answers. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/103727"
    },
    {
      "q": "What changed in Gagnon Securities, LLC's recent Form ADV filings?",
      "a": "In the March 2026 filing data: Registered or notice-filed in KS, SD. Updated its list of owners and control persons (Schedule A)."
    }
  ],
  "filing_history": [
    {
      "period": "2021-10-01",
      "regulatory_assets_under_management": 784631376.0,
      "total_employees": 23,
      "filing_date": "2021-08-06"
    },
    {
      "period": "2022-10-01",
      "regulatory_assets_under_management": 710114755.0,
      "total_employees": 23,
      "filing_date": "2022-02-24"
    },
    {
      "period": "2023-10-01",
      "regulatory_assets_under_management": 461415925.0,
      "total_employees": 23,
      "filing_date": "2023-05-24"
    },
    {
      "period": "2024-10-01",
      "regulatory_assets_under_management": 437985074.0,
      "total_employees": 22,
      "filing_date": "2024-03-28"
    },
    {
      "period": "2025-10-01",
      "regulatory_assets_under_management": 545317238.0,
      "total_employees": 20,
      "filing_date": "2025-06-03"
    },
    {
      "period": "2026-10-01",
      "regulatory_assets_under_management": 529713650.0,
      "total_employees": 19,
      "filing_date": "2026-08-12"
    }
  ],
  "recent_changes": [
    {
      "period": "2026-03-01",
      "period_label": "March 2026",
      "notes": [
        "Registered or notice-filed in KS, SD.",
        "Updated its list of owners and control persons (Schedule A)."
      ]
    }
  ],
  "fees_from_brochure": null,
  "custodians": [
    {
      "name": "National Financial Services LLC",
      "name_as_filed": "NATIONAL FINANCIAL SERVICES LLC",
      "affiliated": false
    }
  ],
  "custodians_note": "Custodians holding 10% or more of the firm's separately managed account assets, as filed on Form ADV (Schedule D, Section 5.K(3)). A custodian holds client assets; it does not endorse or supervise the firm. AdvisorCensus has no relationship with any custodian.",
  "markdown_url": "https://advisorcensus.com/firm/gagnon-securities-llc-new-york-ny-103727.md",
  "clients": [
    {
      "type": "individuals",
      "label": "Individuals (other than high net worth individuals)",
      "count": 1025,
      "fewer_than_5": false,
      "raum": 247565175.0
    },
    {
      "type": "high_net_worth_individuals",
      "label": "High net worth individuals",
      "count": 33,
      "fewer_than_5": false,
      "raum": 224168211.0
    },
    {
      "type": "corporations_other_businesses",
      "label": "Corporations or other businesses not listed above",
      "count": 144,
      "fewer_than_5": false,
      "raum": 57980264.0
    }
  ],
  "disclosure_line": "Reports 3 disclosure items on Form ADV Item 11.",
  "indexable": true,
  "suppressed": false,
  "claimed": false,
  "enhanced": false,
  "provided_by_the_firm": null,
  "source": {
    "name": "Form ADV",
    "as_of": "2026-10-01",
    "iapd_url": "https://adviserinfo.sec.gov/firm/summary/103727",
    "operator": "BH Monitor Services, LLC",
    "license": "https://creativecommons.org/licenses/by/4.0/",
    "credit": "AdvisorCensus (advisorcensus.com), from SEC Form ADV data"
  }
}