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SION: insider buying, 13F holders, analyst moves
Sionna Therapeutics Inc
A summary of public filings about Sionna Therapeutics Inc. For the latest insider history, price chart, analyst changes and activist filings, open the live lookup.
SEC Form 13F · Q2 2026
6 of our 100 managers hold SION
Combined reported value $664.6M; 1 sold out since Q1 2026.
Holders among our 100 managers: 0 in Q3 2023, 6 in Q2 2026.
| Manager | Value | % of portfolio | Change vs Q1 2026 |
|---|---|---|---|
| RA Capital | $435.7M | 3.79% | Unchanged |
| Viking Global Investors | $140.6M | 0.40% | Unchanged |
| Perceptive Advisors | $39.8M | 0.62% | Added |
| Deerfield Company | $30.0M | 0.31% | Trimmed |
| Baker Bros. Advisors | $17.6M | 0.09% | Unchanged |
| Tudor Investment | $993K | 0.00% | New |
Important information
Facts from public SEC filings, shown for information only. Not a recommendation. Not individualized investment advice. Gulfstream Capital and its clients may hold positions in securities shown.