Company: SION
Filing Date: 2025-02-18
Form Type: SCHEDULE 13D
Source: 0001839882-25-009559
Chunk: 0

Company: Sionna Therapeutics, Inc.
Filing Date: 2025-02-18
Form: SCHEDULE 13D
Chunk 0
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 (each a "Reporting Person" and collectively, the "Reporting Persons").                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
 TPG GP A is the managing member of each of (i) TPG Group Holdings (SBS) Advisors, LLC, a Delaware limited liability company, which is the general partner of TPG Group Holdings (SBS), L.P., a Delaware limited partnership, and (ii) Alabama Investments (Parallel) GP, LLC, a Delaware limited liability company, which is the general partner of each of (a) Alabama Investments (Parallel), LP, a Delaware limited partnership, (b) Alabama Investments (Parallel) Founder A, LP, a Delaware limited partnership, and (c) Alabama Investments (Parallel) Founder G, LP, a Delaware limited partnership, which, collectively with TPG Group Holdings (SBS), L.P., Alabama Investments (Parallel), LP and Alabama Investments (Parallel) Founder A, LP, holds 100% of the shares of Class B common stock (which represents a majority of the combined voting power of the common stock) of TPG Inc., a Delaware corporation ("TPG"), which is the managing member of TPG GPCo, LLC, a Delaware limited liability company, which is the sole member of TPG Holdings II-A, LLC, a Delaware limited liability company, which is the general partner of TPG Operating Group II, L.P., a Delaware limited partnership, which is the sole member of TPG Holdings I-A, LLC, a Delaware limited liability company, which is the general partner of TPG Operating Group I, L.P, a Delaware limited partnership, which is the sole member of The Rise Fund GenPar Advisors, LLC, a Delaware limited liability company, which is the general partner of The Rise Fund GenPar, L.P., a Delaware limited partnership, which is the managing member of The Rise Fund SPV GP, LLC, a Delaware limited liability company, which is the general partner of each of (i) The Rise Fund Sling, L.P., a Delaware limited partnership, which directly holds 5,476,598 shares of Common Stock, and (ii) The Rise Fund Sling II, L.P., a Delaware limited partnership (together with The Rise Fund Sling, L.P., the "TPG Funds"), which directly holds 1,208,364 shares of Common Stock.                                                                                                                                                                                                                                                                                                                 
 Because of the relationship of TPG GP A to the TPG Funds, TPG GP A may