Company: SION
Filing Date: 2025-02-06
Form Type: 3
Source: 0001839882-25-007759
Chunk: 1

Company: Sionna Therapeutics, Inc.
Filing Date: 2025-02-06
Form: 3
Chunk 1
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 |             |                        |     |     |   |
| Series Seed Preferred Stock                | [F4]                                                     | N/A                                                                         | N/A                                                    | N/A                                                      | N/A                                                   | N/A | N/A | [F4] - [F4] | Common Stock - 873,503 | N/A | N/A | I |
| Series A Preferred Stock                   | [F4]                                                     | N/A                                                                         | N/A                                                    | N/A                                                      | N/A                                                   | N/A | N/A | [F4] - [F4] | Common Stock - N/A     | N/A | N/A | I |
| Series B Preferred Stock                   | [F4]                                                     | N/A                                                                         | N/A                                                    | N/A                                                      | N/A                                                   | N/A | N/A | [F4] - [F4] | Common Stock - N/A     | N/A | N/A | I |
| Series C Preferred Stock                   | [F4]                                                     | N/A                                                                         | N/A                                                    | N/A                                                      | N/A                                                   | N/A | N/A | [F4] - [F4] | Common Stock - N/A     | N/A | N/A | I |

Remarks:

7. The Reporting Persons are jointly filing this Form 3 pursuant to Rule 16a-3(j) under the Exchange Act.
8. Gerald Neugebauer is signing on behalf of Messrs. Coulter and Winkelried pursuant to authorization and designation letters dated January 10, 2024, which were previously filed with the Securities and Exchange Commission.

| ** Signature of Reporting Person                              
 /s/ /s/ Bradford Berenson, General Counsel, TPG GP A, LLC (7) | Date       
 02/06/2025 |

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