Baker Bros. Advisors LP
- SEC CIK
- 0001263508
- Latest filing
- Aug 14, 2026
SION holding history
Sionna Therapeutics, Inc. in every 13F filed by Baker Bros. Advisors LP, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.
SION overviewAll 13F holders of SIONFull Q2 2026 holdings
- Shares (Q2 2026)
- 400,000
- Value
- $17.6M
- % of portfolio
- 0.1%
- Quarters held
- 6
- Since Q1 2025
| Quarter | Shares | Value | % of portfolio | Share change | Action | All holders |
|---|---|---|---|---|---|---|
| Q2 2026 | 400,000 | $17.6M | 0.1% | 00.0% | Unchanged | Holders |
| Q1 2026 | 400,000 | $16.0M | 0.1% | 00.0% | Unchanged | Holders |
| Q4 2025 | 400,000 | $16.5M | 0.1% | 00.0% | Unchanged | Holders |
| Q3 2025 | 400,000 | $11.8M | 0.1% | 00.0% | Unchanged | Holders |
| Q2 2025 | 400,000 | $6.94M | 0.1% | 00.0% | Unchanged | Holders |
| Q1 2025 | 400,000 | $4.18M | <0.1% | +400,000 | New | Holders |