VIKING GLOBAL INVESTORS LP 13D and 13G filings for Sionna Therapeutics, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-05-15 5:48 pm Purchase | 2026-03-31 | 13G | SIONNA THERAPEUTICS INC SION | VIKING GLOBAL INVESTORS LP | 3,195,181 7.100% | 242,427 (+8.21%) | Filing |
| 2025-02-14 4:58 pm Purchase | 2025-02-10 | 13G | SIONNA THERAPEUTICS INC SION | VIKING GLOBAL INVESTORS LP | 2,952,754 6.700% | 2,952,754 (New Position) | Filing |