Company: SION
Filing Date: 2025-01-17
Form Type: S-1
Source: 0001193125-25-008474
Chunk: 317

Company: Sionna Therapeutics, Inc.
Filing Date: 2025-01-17
Form: S-1
Chunk 317
---
 the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

September 12, 2024

We have served as the Company’s auditor since 2021.

F-2

SIONNA THERAPEUTICS, INC. CONSOLIDATED BALANCE SHEETS (in thousands, except share and per share data)

|                                                                                                                                                |     | Year Ended December 31, |     2023 |   |     |   |    2022 |   |
|:-----------------------------------------------------------------------------------------------------------------------------------------------|:----|:------------------------|---------:|:--|:----|:--|--------:|:--|
| Assets                                                                                                                                         |     |                         |          |   |     |   |         |   |
| Current assets:                                                                                                                                |     |                         |          |   |     |   |         |   |
| Cash and cash equivalents                                                                                                                      |     | $                       |   38,521 |   |     | $ |  54,837 |   |
| Marketable securities                                                                                                                          |     |                         |        — |   |     |   |  27,773 |   |
| Prepaid expenses and other current assets                                                                                                      |     |                         |      686 |   |     |   |   1,223 |   |
| Total current assets                                                                                                                           |     |                         |   39,207 |   |     |   |  83,833 |   |
| Property and equipment, net                                                                                                                    |     |                         |    3,107 |   |     |   |   2,574 |   |
| Restricted cash                                                                                                                                |     |                         |      962 |   |     |   |     962 |   |
| Operating lease right-of-use                                                                                                                   
 asset                                                                                                                                          |     |                         |    8,625 |   |     |   |       — |   |
| Other assets                                                                                                                                   |     |                         |       44 |   |     |   |       — |   |
| Total assets                                                                                                                                   |     | $                       |   51,945 |   |     | $ |  87,369 |   |
| Liabilities, convertible preferred stock and stockholders’ deficit                                                                             |     |                         |          |   |     |   |         |   |
| Current liabilities:                                                                                                                           |     |                         |          |   |     |   |