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
44.1M shares
Disclosed Ownership
2.95M 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

Reporting Managers (11)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
VIKING GLOBAL INVESTORS LP 6.7% 2.95M 0 2.95M /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% 2.95M 0 2.95M /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% 1.89M 0 1.89M /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% 1.89M 0 1.89M /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% 1.89M 0 1.89M /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% 1.06M 0 1.06M /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% 1.06M 0 1.06M /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% 1.06M 0 1.06M /s/ Scott M. Hendler Scott M. Hendler on behalf of Viking Global Opportunities Drawdown (Aggregator) LP (1)(2)(3)
HALVORSEN OLE ANDREAS 6.7% 2.95M 0 2.95M /s/ Scott M. Hendler Scott M. Hendler on behalf of O. Andreas Halvorsen (1)
Ott David C. 6.7% 2.95M 0 2.95M /s/ Scott M. Hendler Scott M. Hendler on behalf of David C. Ott (2)
Shabet Rose Sharon 6.7% 2.95M 0 2.95M /s/ Scott M. Hendler Scott M. Hendler on behalf of Rose S. Shabet (3)