Portolan Capital Management, LLC - 07 Apr 2025 SCHEDULE 13G Report for Castle Biosciences, Inc. Common Stock, $0.001 par value per share (CSTL)

Filing Manager
Portolan Capital Management, LLC
Reporting Manager
Portolan Capital Management, LLC
Security
Castle Biosciences, Inc. Common Stock, $0.001 par value per share
Symbol
CSTL
Shares outstanding
28,515,027 shares
Disclosed Ownership
1,611,099 shares
Ownership
5.6%
Form type
SCHEDULE 13G
Filing time
14 Apr 2025, 15:34:04 UTC
Date of event
07 Apr 2025
SEC
View on sec.gov

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Quoteable Key Fact

"Portolan Capital Management, LLC disclosed 5.6% ownership in Castle Biosciences, Inc. Common Stock, $0.001 par value per share (CSTL) on 07 Apr 2025."

Quick Takeaways

  • Portolan Capital Management, LLC filed SCHEDULE 13G for Castle Biosciences, Inc. Common Stock, $0.001 par value per share (CSTL).
  • Disclosed ownership: 5.6%.
  • Date of event: 07 Apr 2025.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 14 Apr 2025, 15:34.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Official SEC Source

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

Reporting Managers (2)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Portolan Capital Management, LLC 5.6% 1,611,099 1,611,099 0 George McCabe George McCabe/Manager
George McCabe 5.6% 1,611,099 1,611,099 0 George McCabe George McCabe

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