Company: SION
Filing Date: 2025-04-29
Form Type: DEF 14A
Source: 0001193125-25-101830
Chunk: 31

Company: Sionna Therapeutics, Inc.
Filing Date: 2025-04-29
Form: DEF 14A
Chunk 31
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 employees of concerns regarding questionable accounting, internal accounting controls or auditing matters. We have also established a toll-free telephone number for the reporting of such activity, which is +1 833-364-0898,which permits submissions on a confidential and anonymous basis. 21

Executive Officers who are not Directors The following table identifies our executive officers who are not directors, and sets forth their current positions at Sionna and their ages as of April 15, 2025.

| Name                  |     | Position Held with Sionna                                 |     | Officer 
   Since |     | Age |
| Elena Ridloff, C.F.A. |     | Chief Financial Officer and Head of Corporate Development |     |    2021 |     |  45 |
| Charlotte McKee, M.D. |     | Chief Medical Officer                                     |     |    2021 |     |  60 |
| Jennifer Fitzpatrick  |     | Chief Legal Officer                                       |     |    2025 |     |  48 |

Elena Ridloff, C.F.A.has served as our Chief Financial Officer and Head of Corporate Development since September 2021. Previously, Ms. Ridloff served in multiple roles at Acadia Pharmaceuticals Inc. (NASDAQ: ACAD) from 2018 to 2021, including most recently as chief financial officer from October 2018 to September 2021. Ms. Ridloff has also served on the board of directors of Kymera Therapeutics, Inc. (NASDAQ: KYMR) (“Kymera”), since March 2021 and Kronos Bio, Inc. (NASDAQ: KRON) since September 2020. Ms. Ridloff earned a B.A. in history and sociology of science from the University of Pennsylvania and is a Chartered Financial Analyst. Charlotte McKee, M.D.has served as our Chief Medical Officer since June 2021. Previously, Dr. McKee served as vice president, Cystic Fibrosis and Alpha-1 AntitrypsinDeficiency Clinical Development at Vertex Pharmaceuticals Inc. (NASDAQ: VRTX), from June 2014 to March 2020. Dr. McKee earned a B.A. in history and science from Harvard University, an M.A. in history from Columbia University and an M.D. from Columbia University Vagelos College of Physicians and Surgeons, and completed internal medicine training and a pulmonary and critical care fellowship at Johns Hopkins University School of Medicine. Jennifer Fitzpatrick, J.D.has