# Sionna Therapeutics, Inc. (SION) insider trading, Q3 2026

Canonical: https://sec-api.dev/insider-trading/sion

> 16 non-derivative transactions: 0 purchases, 7 sales ($40.5M). CIK 2036042.

| Date | Insider | Relationship | Code | Shares | Price | Owned after | Filing |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2026-09-17 | RA CAPITAL MANAGEMENT, L.P. / RA Capital Healthcare Fund LP / RA Capital Nexus Fund III, L.P. / Shah Rajeev M. / RA Capital Nexus Fund, L.P. / Kolchinsky Peter | Director, TenPercentOwner | S | 3415011.0 | 6.32 | 3482612.0 | https://www.sec.gov/Archives/edgar/data/2036042/000123191926001201/0001231919-26-001201-index.htm |
| 2026-09-17 | RA CAPITAL MANAGEMENT, L.P. / RA Capital Healthcare Fund LP / RA Capital Nexus Fund III, L.P. / Shah Rajeev M. / RA Capital Nexus Fund, L.P. / Kolchinsky Peter | Director, TenPercentOwner | S | 33800.0 | 7.46 | 3448812.0 | https://www.sec.gov/Archives/edgar/data/2036042/000123191926001201/0001231919-26-001201-index.htm |
| 2026-09-17 | Cloonan Michael | Director, Officer | A | 109025.0 | 0.0 | 656368.0 | https://www.sec.gov/Archives/edgar/data/2036042/000170433626000005/0001704336-26-000005-index.htm |
| 2026-09-17 | Cloonan Michael | Director, Officer | A | 109025.0 | 0.0 | 765393.0 | https://www.sec.gov/Archives/edgar/data/2036042/000170433626000005/0001704336-26-000005-index.htm |
| 2026-09-17 | Ridloff Elena | Officer | A | 47268.0 | 0.0 | 133069.0 | https://www.sec.gov/Archives/edgar/data/2036042/000177251826000004/0001772518-26-000004-index.htm |
| 2026-09-17 | Ridloff Elena | Officer | A | 47269.0 | 0.0 | 85801.0 | https://www.sec.gov/Archives/edgar/data/2036042/000177251826000004/0001772518-26-000004-index.htm |
| 2026-09-17 | McKee Charlotte | Officer | A | 50000.0 | 0.0 | 128415.0 | https://www.sec.gov/Archives/edgar/data/2036042/000204643326000005/0002046433-26-000005-index.htm |
| 2026-09-17 | McKee Charlotte | Officer | A | 50000.0 | 0.0 | 78415.0 | https://www.sec.gov/Archives/edgar/data/2036042/000204643326000005/0002046433-26-000005-index.htm |
| 2026-09-17 | Fitzpatrick Jennifer | Officer | A | 28132.0 | 0.0 | 56265.0 | https://www.sec.gov/Archives/edgar/data/2036042/000206185126000009/0002061851-26-000009-index.htm |
| 2026-09-17 | Fitzpatrick Jennifer | Officer | A | 28133.0 | 0.0 | 28133.0 | https://www.sec.gov/Archives/edgar/data/2036042/000206185126000009/0002061851-26-000009-index.htm |
| 2026-07-07 | OrbiMed Capital GP VIII LLC / ORBIMED ADVISORS LLC | Director | S | 85918.0 | 44.86 | 2469959.0 | https://www.sec.gov/Archives/edgar/data/2036042/000094787126000694/0000947871-26-000694-index.htm |
| 2026-07-07 | Thompson Peter A. | Director | S | 85918.0 | 44.86 | 2469959.0 | https://www.sec.gov/Archives/edgar/data/2036042/000094787126000695/0000947871-26-000695-index.htm |
| 2026-07-06 | Fitzpatrick Jennifer | Officer | M | 10250.0 | 6.11 | 10250.0 | https://www.sec.gov/Archives/edgar/data/2036042/000206185126000006/0002061851-26-000006-index.htm |
| 2026-07-06 | Fitzpatrick Jennifer | Officer | S | 10250.0 | 43.6 | 0.0 | https://www.sec.gov/Archives/edgar/data/2036042/000206185126000006/0002061851-26-000006-index.htm |
| 2026-06-30 | ORBIMED ADVISORS LLC / OrbiMed Capital GP VIII LLC | Director | S | 115844.0 | 45.5 | 2555877.0 | https://www.sec.gov/Archives/edgar/data/2036042/000094787126000683/0000947871-26-000683-index.htm |
| 2026-06-30 | Thompson Peter A. | Director | S | 115844.0 | 45.5 | 2555877.0 | https://www.sec.gov/Archives/edgar/data/2036042/000094787126000684/0000947871-26-000684-index.htm |

Source: https://www.sec.gov/data-research/sec-markets-data/insider-transactions-data-sets

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