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GAGNON SECURITIES LLC

GAGNON SECURITIES LLC is a Broker-Dealer institutional filer with the SEC under CIK 1125725, reporting 83 portfolio positions, with 19 historical 13F filings on file. Most recent reporting period: 2026-06-30.

A Form 13F reports a manager's US-listed stock and option positions only. It does not include real estate, private funds, bonds, cash or non-US holdings, so a 13F portfolio value is not the firm's total assets under management (AUM).

  • State of incorporation: DE
  • Filing type: 13F-HR
  • Latest reporting period: 2026-06-30
  • Last filed: 2026-08-04

Top 10 portfolio positions

The largest reported holdings in GAGNON SECURITIES LLC's most recent 13F filing, ranked by reported market value.

  1. CAREDX INC (CDNA)
  2. GENEDX HOLDINGS CORP (WGS)
  3. ENSIGN GROUP INC (ENSG)
  4. AMERESCO INC (AMRC)
  5. GENERAC HLDGS INC (GNRC)
  6. ENTERPRISE PRODS PARTNERS L P (EPD)
  7. QUIDELORTHO CORP (QDEL)
  8. CHEESECAKE FACTORY INC (CAKE)
  9. EQUINIX INC (EQIX)
  10. CARMAX INC (KMX)
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