Company: SION
Filing Date: 2025-01-17
Form Type: S-1
Source: 0001193125-25-008474
Chunk: 280

Company: Sionna Therapeutics, Inc.
Filing Date: 2025-01-17
Form: S-1
Chunk 280
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923,773 shares of         
 common stock issuable upon the conversion of Series B preferred stock held by RACHF, (v) 4,364,874 shares of common stock issuable upon the conversion of Series C preferred stock held by RACHF, (vi) 500,000 shares of common stock held by           
 RA Capital Nexus Fund, L.P. (“Nexus”), (vii) 319,069 shares of common stock issuable upon conversion of Series Seed preferred stock held by Nexus, (viii) 451,580 shares of common stock issuable upon the conversion of Series A                       
 preferred stock held by Nexus, (ix) 2,155,469 shares of common stock issuable upon the conversion of Series B preferred stock held by RA Capital Nexus Fund III, L.P. (“Nexus III”), (x) 1,091,219 shares of common stock issuable upon                 
 the conversion of Series C preferred stock held by Nexus III, (xi) 216,000 shares of common stock held by Blackwell Partners LLC—Series A (“Blackwell”), (xii) 138,054 shares of common stock issuable upon the conversion of Series                    
 Seed preferred stock held by Blackwell and (xiii) 124,908 shares of common stock issuable upon the conversion of Series A preferred stock held by Blackwell. RA Capital Management, LP (“RACM”) is the investment adviser to RACHF, Nexus,              
 Nexus III and Blackwell. RA Capital Management GP, LLC (“RACM GP”) is the general partner of RACM. Peter Kolchinsky and Rajeev Shah are the managing members of RACM GP and may be deemed to have voting and investment power over the shares           
 held by RACHF, Nexus, Nexus III and Blackwell. RACM, RACM GP, Peter Kolchinsky and Rajeev Shah disclaim beneficial ownership of the shares owned by RACHF, Nexus, Nexus III and Blackwell, except to the extent of their pecuniary interest therein, if 
 any. The address for each of these entities and individuals is 200 Berkeley Street, 18th Floor, Boston, MA 02116.                                                                                                                                       |

| (4) | Consists of 2,817,045 shares of common stock issuable upon the conversion of Series C preferred stock held by Sionna                                                                                                                                      
 Aggregator, LP. (“Sionna Aggregator”), a limited partnership affiliated with Enav