<SEC-DOCUMENT>0000905148-25-000694-index.html : 20250214
<SEC-HEADER>0000905148-25-000694.hdr.sgml : 20250214
<ACCEPTANCE-DATETIME>20250214165802
ACCESSION NUMBER:		0000905148-25-000694
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20250214
DATE AS OF CHANGE:		20250214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Sionna Therapeutics, Inc.
		CENTRAL INDEX KEY:			0002036042
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-94871
		FILM NUMBER:		25630444

	BUSINESS ADDRESS:	
		STREET 1:		21 HICKORY DRIVE, SUITE 500
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
		BUSINESS PHONE:		617-819-2020

	MAIL ADDRESS:	
		STREET 1:		21 HICKORY DRIVE, SUITE 500
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VIKING GLOBAL INVESTORS LP
		CENTRAL INDEX KEY:			0001103804
		ORGANIZATION NAME:           	
		IRS NUMBER:				134055118
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G

	BUSINESS ADDRESS:	
		STREET 1:		600 WASHINGTON BLVD.
		STREET 2:		FLOOR 11
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06901
		BUSINESS PHONE:		212-672-7050

	MAIL ADDRESS:	
		STREET 1:		600 WASHINGTON BLVD.
		STREET 2:		FLOOR 11
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06901
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>jointfilingagreement.htm
<TEXT>
Document 2 - file: jointfilingagreement.htm

</DOCUMENT>
</SEC-DOCUMENT>