Sionna Therapeutics, Inc.
For the period ended Jun 30, 2026. Filed Aug 6, 2026.
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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.
Jun 30, 2026 · Filed Aug 6, 2026
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Item 6. Exhibits
(a)Exhibits.
| ExhibitNumber | Description |
| 3.1 | Fifth 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). |
| 3.2 | Amended 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). |
| 4.1 | Specimen 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.INS | Inline XBRL Instance Document |
| 101.SCH | Inline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents |
| 104 | Cover Page Interactive Data File (embedded with the Inline XBRL document) |
*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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