1 institutions reported holding $10,734 of SIONNA THERAPEUTICS INC COM (SION) in SEC 13F filings for 2026-06-30. Largest institutional holders: GAMMA Investing LLC ($10,734). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GAMMA Investing LLC | $10,734 | 244 | Added |
Source: SEC Form 13F filings · as of 2026-06-30