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 | — | |
| Jul 7, 2026 SForm 4 → | Jul 9, 4:47 pm EDT | Peter A. ThompsonDirector | 85,918 | $44.86 | $3,854,281 | 2,469,959 | −3.36% | 10b5-1 |
| Jul 7, 2026 SForm 4 → | Jul 9, 4:44 pm EDT | ORBIMED ADVISORS LLC +1Director | 85,918 | $44.86 | $3,854,281 | 2,469,959 | −3.36% | 10b5-1 |
| Jul 6, 2026 SForm 4 → | Jul 7, 4:38 pm EDT | Jennifer FitzpatrickChief Legal Officer | 10,250 | $43.60 | $446,862 | 0 | −100% | 10b5-1 |
| Jul 6, 2026 MForm 4 → | Jul 7, 4:38 pm EDT | Jennifer FitzpatrickChief Legal Officer | 10,250 | $6.11 | $62,628 | 10,250 | — | 10b5-1 |
| Jun 30, 2026 SForm 4 → | Jul 2, 4:45 pm EDT | Peter A. ThompsonDirector | 115,844 | $45.50 | $5,270,902 | 2,555,877 | −4.34% | 10b5-1 |
| Jun 30, 2026 SForm 4 → | Jul 2, 4:42 pm EDT | ORBIMED ADVISORS LLC +1Director | 115,844 | $45.50 | $5,270,902 | 2,555,877 | −4.34% | 10b5-1 |
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 | — | |
| Jul 6, 2026 MForm 4 → | Jul 7, 4:38 pm EDT | Jennifer FitzpatrickChief Legal Officer | 10,250 | — | — | 40,685 | — | 10b5-1 |
| Jun 17, 2026 AForm 4 → | Jun 18, 5:58 pm EDT | Laurie StelzerDirector | 17,340 | — | — | 17,340 | — | |
| Jun 17, 2026 AForm 4 → | Jun 18, 5:48 pm EDT | Joanne L. VineyDirector | 17,340 | — | — | 17,340 | — | |
| Jun 17, 2026 AForm 4 → | Jun 18, 5:45 pm EDT | Peter A. ThompsonDirector | 17,340 | — | — | 17,340 | — | |
| Jun 17, 2026 AForm 4 → | Jun 18, 5:41 pm EDT | RA CAPITAL MANAGEMENT, L.P. +5Director, 10% Owner | 17,340 | — | — | 17,340 | — | |
| Jun 17, 2026 AForm 4 → | Jun 18, 5:39 pm EDT | Marcella K. RuddyDirector | 17,340 | — | — | 17,340 | — | |
| Jun 17, 2026 AForm 4 → | Jun 18, 5:37 pm EDT | Joshua ResnickDirector | 17,340 | — | — | 17,340 | — | |
| Jun 17, 2026 AForm 4 → | Jun 18, 5:35 pm EDT | Harold Edward FlemingDirector | 17,340 | — | — | 17,340 | — | |
| Jun 17, 2026 AForm 4 → | Jun 18, 5:33 pm EDT | Paul J ClancyDirector | 17,340 | — | — | 17,340 | — | |
| Jun 17, 2026 AForm 4 → | Jun 18, 5:29 pm EDT | Bruce BoothDirector | 17,340 | — | — | 17,340 | — |