Filing Manager
ORBIMED ADVISORS LLC
Reporting Manager
ORBIMED ADVISORS LLC
Symbol
SION
Shares outstanding
44,106,655 shares
Disclosed Ownership
3,704,959 shares
Ownership
8.4%
Form type
SCHEDULE 13D
Filing time
13 Feb 2025, 16:47:52 UTC
Date of event
10 Feb 2025

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Quoteable Key Fact

"ORBIMED ADVISORS LLC disclosed 8.4% ownership in Sionna Therapeutics, Inc. Common Stock (SION) on 10 Feb 2025."

Quick Takeaways

  • ORBIMED ADVISORS LLC filed SCHEDULE 13D for Sionna Therapeutics, Inc. Common Stock (SION).
  • Disclosed ownership: 8.4%.
  • Date of event: 10 Feb 2025.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 13 Feb 2025, 16:47.

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
ORBIMED ADVISORS LLC 8.4% 3,704,959 0 3,704,959 /s/ Carl L. Gordon Carl L. Gordon/Member 0001055951
OrbiMed Capital GP VIII LLC 8.4% 3,704,959 0 3,704,959 /s/ Carl L. Gordon Carl L. Gordon/Member of OrbiMed Advisors LLC 0001845804