VIKING GLOBAL INVESTORS LP - 10 Feb 2025 SCHEDULE 13G Report for Sionna Therapeutics, Inc. Common Stock, $0.001 par value per share (SION)

Filing Manager
VIKING GLOBAL INVESTORS LP
Reporting Manager
VIKING GLOBAL INVESTORS LP
Security
Sionna Therapeutics, Inc. Common Stock, $0.001 par value per share
Symbol
SION
Shares outstanding
44,070,955 shares
Disclosed Ownership
2,952,754 shares
Ownership
6.7%
Form type
SCHEDULE 13G
Filing time
14 Feb 2025, 16:58:02 UTC
Date of event
10 Feb 2025
SEC
View on sec.gov

Quoteable Key Fact

"VIKING GLOBAL INVESTORS LP disclosed 6.7% ownership in Sionna Therapeutics, Inc. Common Stock, $0.001 par value per share (SION) on 10 Feb 2025."

Quick Takeaways

  • VIKING GLOBAL INVESTORS LP filed SCHEDULE 13G for Sionna Therapeutics, Inc. Common Stock, $0.001 par value per share (SION).
  • Disclosed ownership: 6.7%.
  • Date of event: 10 Feb 2025.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 14 Feb 2025, 16:58.

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.

Source Evidence

Backed by Schedule 13D/13G

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

See Original Filing

Reporting Managers (11)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
VIKING GLOBAL INVESTORS LP 6.7% 2,952,754 0 2,952,754 /s/ Scott M. Hendler Scott M. Hendler on behalf of VIKING GLOBAL INVESTORS LP (1)(2)(3)
Viking Global Opportunities Parent GP LLC 6.7% 2,952,754 0 2,952,754 /s/ Scott M. Hendler Scott M. Hendler on behalf of Viking Global Opportunities Parent GP LLC (1)(2)(3)
Viking Global Opportunities GP LLC 4.3% 1,894,346 0 1,894,346 /s/ Scott M. Hendler Scott M. Hendler on behalf of Viking Global Opportunities GP LLC (1)(2)(3)
Viking Global Opportunities Portfolio GP LLC 4.3% 1,894,346 0 1,894,346 /s/ Scott M. Hendler Scott M. Hendler on behalf of Viking Global Opportunities Portfolio GP LLC (1)(2)(3)
Viking Global Opportunities Illiquid Investments Sub-Master LP 4.3% 1,894,346 0 1,894,346 /s/ Scott M. Hendler Scott M. Hendler on behalf of Viking Global Opportunities Illiquid Investments Sub-Master LP (1)(2)(3)
Viking Global Opportunities Drawdown GP LLC 2.4% 1,058,408 0 1,058,408 /s/ Scott M. Hendler Scott M. Hendler on behalf of Viking Global Opportunities Drawdown GP LLC (1)(2)(3)
Viking Global Opportunities Drawdown Portfolio GP LLC 2.4% 1,058,408 0 1,058,408 /s/ Scott M. Hendler Scott M. Hendler on behalf of Viking Global Opportunities Drawdown Portfolio GP LLC (1)(2)(3)
Viking Global Opportunities Drawdown (Aggregator) LP 2.4% 1,058,408 0 1,058,408 /s/ Scott M. Hendler Scott M. Hendler on behalf of Viking Global Opportunities Drawdown (Aggregator) LP (1)(2)(3)
HALVORSEN OLE ANDREAS 6.7% 2,952,754 0 2,952,754 /s/ Scott M. Hendler Scott M. Hendler on behalf of O. Andreas Halvorsen (1)
Ott David C. 6.7% 2,952,754 0 2,952,754 /s/ Scott M. Hendler Scott M. Hendler on behalf of David C. Ott (2)
Shabet Rose Sharon 6.7% 2,952,754 0 2,952,754 /s/ Scott M. Hendler Scott M. Hendler on behalf of Rose S. Shabet (3)