Sionna Therapeutics, Inc. Common Stock (SION) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for SION. 13F holdings as of 2026-06-30.
In 13F filings for the quarter ended June 30, 2026, 141 institutions reported holding SION, with 48.1 million shares worth $2.1 billion in aggregate.
Top Institutional Holders
| Institution | Shares | Value | Change |
|---|---|---|---|
| RA Capital Management | 9,905,045 | $436M | UNCHANGED |
| Tpg GP a | 6,494,962 | $286M | UNCHANGED |
| Viking Global Investors | 3,195,181 | $141M | UNCHANGED |
| Atlas Venture Life Science Advisors | 2,995,602 | $132M | UNCHANGED |
| Orbimed Advisors | 2,555,877 | $112M | DECREASED |
Full institutional holdings, insider history, and congressional trades for Sionna Therapeutics, Inc. Common Stock on SentiSense.