Insider holders · CIK 0002036042
Sionna Therapeutics, Inc. · SION
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| OrbiMed Capital GP VIII LLCDirector | — | 2,469,959 | 2,469,959 | Jul 9, 2026 · 4:44 pm EDT | Form 4 |
| Peter A. ThompsonDirector | — | 2,469,959 | 2,469,959 | Jul 9, 2026 · 4:47 pm EDT | Form 4 |
| ORBIMED ADVISORS LLCDirector | — | 2,469,959 | 2,469,959 | Jul 9, 2026 · 4:44 pm EDT | Form 4 |
| Michael CloonanPresident & CEO | 765,393 | — | 765,393 | Sep 18, 2026 · 4:52 pm EDT | Form 4 |
| RA Capital Nexus Fund III, L.P.Director | — | 159,033 | 159,033 | Sep 21, 2026 · 6:56 pm EDT | Form 4 |
| RA Capital Nexus Fund, L.P.Director | — | 159,033 | 159,033 | Sep 21, 2026 · 6:56 pm EDT | Form 4 |
| Rajeev M. ShahDirector | — | 159,033 | 159,033 | Sep 21, 2026 · 6:56 pm EDT | Form 4 |
| Peter KolchinskyDirector | — | 159,033 | 159,033 | Sep 21, 2026 · 6:56 pm EDT | Form 4 |
| RA CAPITAL MANAGEMENT, L.P.Director | — | 159,033 | 159,033 | Sep 21, 2026 · 6:56 pm EDT | Form 4 |
| RA Capital Healthcare Fund LPDirector | — | 159,033 | 159,033 | Sep 21, 2026 · 6:56 pm EDT | Form 4 |
| Elena RidloffCFO and CBO | 133,069 | — | 133,069 | Sep 18, 2026 · 4:59 pm EDT | Form 4 |
| Charlotte McKeeCMO and Head of R&D | 128,415 | — | 128,415 | Sep 18, 2026 · 4:58 pm EDT | Form 4 |
| Jennifer FitzpatrickCLO and Head of Program Mgmt. | 56,265 | — | 56,265 | Sep 18, 2026 · 4:56 pm EDT | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.