Skip to main content
Signal8

Palo Alto Investors LP

Palo Alto Investors LP is an Investment Adviser institutional filer with the SEC under CIK 1306923, reporting 52 portfolio positions, with 35 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: CA
  • Filing type: 13F-HR/A
  • Latest reporting period: 2026-06-30
  • Last filed: 2026-08-19

Top 10 portfolio positions

The largest reported holdings in Palo Alto Investors LP's most recent 13F filing, ranked by reported market value.

  1. PTC THERAPEUTICS INC (PTCT)
  2. ACADIA PHARMACEUTICALS INC (ACAD)
  3. INSMED INC (INSM)
  4. MIRUM PHARMACEUTICALS INC (MIRM)
  5. ANAPTYSBIO INC (ANAB)
  6. BIOMARIN PHARMACEUTICAL INC (BMRN)
  7. DYNE THERAPEUTICS INC (DYN)
  8. UNITED THERAPEUTICS CORP (UTHR)
  9. DISC MEDICINE INC (IRON)
  10. BIOGEN INC (BIIB)
/