Company: SION
Filing Date: 2025-08-11
Form Type: 10-Q
Source: 0002036042-25-000047
Chunk: 299

Company: Sionna Therapeutics, Inc.
Filing Date: 2025-08-11
Form: 10-Q
Item: Part II, Item 6
Chunk 299
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Item 6. Exhibits

(a)Exhibits.

ExhibitNumberDescription3.1Fifth Amended and Restated Certificate of Incorporation of Sionna Therapeutics, Inc. (Incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K (File No. 001-42504) filed on February 10, 2025).3.2Amended and Restated Bylaws of Sionna Therapeutics, Inc. (Incorporated by reference to Exhibit 3.2 of the Registrant’s Current Report on Form 8-K (File No. 001-42504) filed on February 10, 2025).4.1Specimen Common Stock Certificate (Incorporated by reference to Exhibit 4.1 of the Registrant’s Registration Statement on Form S-1 (File No. 333-284352) filed on January 17, 2025).31.1*Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.31.2*Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.32.1*+Certification of Principal Executive Officer and Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.101.INSInline XBRL Instance Document101.SCHInline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents104Cover Page Interactive Data File (embedded with the Inline XBRL document)

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*Filed herewith.

+The certification furnished in Exhibit 32.1 hereto is deemed to be furnished with this Quarterly Report and will not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, except to the extent that the Registrant specifically incorporates it by reference.

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SIGNATURES

Pursuant to the requirements of Section 13