Company · CIK 0002036042 · SIC 2834 — Pharmaceutical Preparations · Nasdaq
Sionna Therapeutics, Inc. · SION
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 17, 2026 SForm 4 → | Sep 21, 6:56 pm EDT | RA CAPITAL MANAGEMENT, L.P. +5Director, 10% Owner | 3,448,811 | $6.33 | $21,835,018 | 3,448,812 | −50.0% | |
| Sep 17, 2026 AForm 4 → | Sep 18, 4:59 pm EDT | Elena RidloffCFO and CBO | 94,537 | — | — | 133,069 | — | |
| Sep 17, 2026 AForm 4 → | Sep 18, 4:58 pm EDT | Charlotte McKeeCMO and Head of R&D | 100,000 | — | — | 128,415 | — | |
| Sep 17, 2026 AForm 4 → | Sep 18, 4:56 pm EDT | Jennifer FitzpatrickCLO and Head of Program Mgmt. | 56,265 | — | — | 56,265 | — | |
| Sep 17, 2026 AForm 4 → | Sep 18, 4:52 pm EDT | Michael CloonanPresident & CEO, Director | 218,050 | — | — | 765,393 | — |
Reported at this company — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 17, 2026 ADForm 4 → | Sep 18, 4:59 pm EDT | Elena RidloffCFO and CBO | 330,880 | — | — | 0 | — | |
| Sep 17, 2026 ADForm 4 → | Sep 18, 4:58 pm EDT | Charlotte McKeeCMO and Head of R&D | 311,400 | — | — | 0 | — | |
| Sep 17, 2026 ADForm 4 → | Sep 18, 4:56 pm EDT | Jennifer FitzpatrickCLO and Head of Program Mgmt. | 206,280 | — | — | 0 | — | |
| Sep 17, 2026 ADForm 4 → | Sep 18, 4:52 pm EDT | Michael CloonanPresident & CEO, Director | 872,200 | — | — | 0 | — |