Sionna Therapeutics, Inc. (SION) has 19 open-market insider trades by 11 insiders since 2025. Over the last six months insiders net sold $21.8M. The most active filer is Peter A. Thompson, Director.
| Name | Title | Tier | Trades | Value | Last Trade |
|---|---|---|---|---|---|
| RA Capital Management, L.P. | Dir10% Owner | — | 3 | $53.0M | 2026-09-17 |
| RA Capital Nexus Fund III, L.P. | Dir10% Owner | — | 1 | $26.3M | 2025-10-28 |
| TPG GP A, LLC | 10% Owner | — | 1 | $20.3M | 2025-02-10 |
| Peter A. Thompson | Dir | — | 5 | $17.1M | 2026-07-07 |
| Jon Winkelried | 10% | — | 1 | $10.0M | 2026-01-22 |
| Orbimed Advisors LLC | Dir | — | 1 | $4.2M | 2026-07-07 |
| OrbiMed Capital GP VIII LLC | Dir | — | 3 | $2.9M | 2026-02-03 |
| Peter Kolchinsky | Dir10% Owner | — | 1 | $1.5M | 2025-11-21 |
| Bruce Booth | Dir | — | 1 | $1.1M | 2025-10-21 |
| James G. Coulter | 10% Owner | — | 1 | $950K | 2025-06-27 |
| Insider | Title | Type | Value | Date |
|---|---|---|---|---|
| RA Capital Management, L.P. | Director & 10% Owner | Sell | $21.8M | 2026-09-17 |
| Orbimed Advisors LLC | Director | Sell | $3.9M | 2026-07-07 |
| Jennifer Fitzpatrick | CLO | Sell | $447K | 2026-07-06 |
| Peter A. Thompson | Director | Sell | $5.3M | 2026-06-30 |
| Orbimed Advisors LLC | Director | Sell | $4K | 2026-05-27 |
| Orbimed Advisors LLC | Director | Sell | $13.4M |
Companies that share insiders with SION, and sector peers with recent insider buying. Related by who files, not by how the stocks move.
| 2026-05-07 |
| Peter A. Thompson | Director | Sell | $2.5M | 2026-04-17 |
| Orbimed Advisors LLC | Director | Sell | $22.9M | 2026-04-14 |
| Jennifer Fitzpatrick | CLO | Sell | $347K | 2026-03-05 |
| Peter A. Thompson | Director | Sell | $1.4M | 2026-02-02 |
| Jon Winkelried | 10% | Sell | $10.0M | 2026-01-22 |
| Peter A. Thompson | Director | Sell | $3.0M | 2025-12-24 |
| OrbiMed Capital GP VIII LLC | Director | Sell | $1.5M | 2025-12-24 |
| OrbiMed Capital GP VIII LLC | Director | Sell | $83K | 2025-12-17 |
| Jennifer Fitzpatrick | CLO | Sell | $831K | 2025-12-05 |