List of insiders holdings for SIONNA THERAPEUTICS, INC.:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | TPG GP A LLC COULTER JAMES G WINKELRIED JON 10% Owner | 2026-01-26 17:24:52 | 0 6,494,962 | 6,494,962 | Form 4 |
| 2 | RA CAPITAL MANAGEMENT L.P. RA Capital Healthcare Fund LP RA Capital Nexus Fund L.P. RA Capital Nexus Fund III L.P. Kolchinsky Peter Shah Rajeev M. Director 10% Owner | 2026-09-21 18:57:34 | 6,476,193 0 | 6,476,193 | Form 13D |
| 3 | Thompson Peter A. Director | 2026-07-09 16:47:48 | 0 2,469,959 | 2,469,959 | Form 4 |
| 4 | ORBIMED ADVISORS LLC OrbiMed Capital GP VIII LLC Director | 2026-07-09 16:44:00 | 0 2,469,959 | 2,469,959 | Form 4 |
| 5 | Atlas Venture Fund XI L.P. Atlas Venture Associates XI L.P. Atlas Venture Associates XI LLC Atlas Venture Opportunity Fund II L.P. Atlas Venture Associates Opportunity II LP Atlas Venture Associates Opportunity II LLC 10% Owner | 2025-10-20 21:40:43 | 2,382,495 0 | 2,382,495 | Form 13D |
| 6 | Cloonan Michael President & CEO | 2026-09-18 16:52:21 | 1,201,493 0 | 1,201,493 | Form 4 |
| 7 | Ridloff Elena CFO and CBO | 2026-09-18 16:59:23 | 298,509 0 | 298,509 | Form 4 |
| 8 | McKee Charlotte CMO and Head of R&D | 2026-09-18 16:58:01 | 284,115 0 | 284,115 | Form 4 |
| 9 | Fitzpatrick Jennifer CLO and Head of Program Mgmt. | 2026-09-18 16:56:38 | 159,405 0 | 159,405 | Form 4 |
| 10 | Beer Caroline Stark Chief Business Officer | 2026-01-06 16:14:03 | 139,340 0 | 139,340 | Form 4 |
| 11 | Clancy Paul J Director | 2026-06-18 17:33:10 | 17,340 0 | 17,340 | Form 4 |
| 12 | Fleming Harold Edward Director | 2026-06-18 17:35:40 | 17,340 0 | 17,340 | Form 4 |
| 13 | Resnick Joshua Director | 2026-06-18 17:37:26 | 17,340 0 | 17,340 | Form 4 |
| 14 | Ruddy Marcella K. Director | 2026-06-18 17:39:37 | 17,340 0 | 17,340 | Form 4 |
| 15 | Viney Joanne L. Director | 2026-06-18 17:48:01 | 17,340 0 | 17,340 | Form 4 |
| 16 | Stelzer Laurie Director | 2026-06-18 17:58:14 | 17,340 0 | 17,340 | Form 4 |
| 17 | Booth Bruce Director | 2026-06-18 17:29:30 | 17,340 0 | 17,340 | Form 4 |
| 18 | Iancovici Lucian Director | 2025-02-06 21:15:33 | 0 0 | 0 | Form 3 |