Schedule 13D ownership disclosure
Sionna Therapeutics Inc
Common Stock, $0.001 par value per share · CUSIP: 829401108
Event date: 2025-11-05
Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.
- Filing-level shares
- Unavailable
- Percent of class
- Unavailable
- RA Capital Management, L.P.Reported CIK 0001346824
Shares: 10,071,712.00 · Class: 22.6%
- Peter KolchinskyReported CIK 0001384859
Shares: 10,071,712.00 · Class: 22.6%
- Rajeev ShahReported CIK 0001619841
Shares: 10,071,712.00 · Class: 22.6%
- RA Capital Healthcare Fund, L.P.Reported CIK 0001315082
Shares: 6,905,625.00 · Class: 15.5%
- RA Capital Nexus Fund III, L.P.Reported CIK 0001883840
Shares: 2,240,708.00 · Class: 5.0%
Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.
Source: SEC EDGAR filingFiling metadata
- Accession number
- 0001346824-25-000045
- Form type
- SCHEDULE 13D/A
- Filer
- RA CAPITAL MANAGEMENT, L.P.
- CIK
- CIK 1346824
- Filed
- Nov 07, 2025
- Reporting period
- Nov 05, 2025
- Description
- Schedule 13D beneficial ownership