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 | 2025-07-01 17:03:20 | 0 6,744,962 | 6,744,962 | Form 4 |
| 2 | ORBIMED ADVISORS LLC OrbiMed Capital GP VIII LLC Director | 2025-12-29 20:44:14 | 0 3,561,655 | 3,561,655 | Form 4 |
| 3 | Thompson Peter A. Director | 2025-12-29 20:42:07 | 0 3,561,655 | 3,561,655 | Form 4 |
| 4 | 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 |
| 5 | Cloonan Michael President & CEO | 2025-10-22 17:39:46 | 936,346 0 | 936,346 | Form 4 |
| 6 | Booth Bruce Director | 2025-10-21 17:12:03 | 0 686,567 | 686,567 | Form 4 |
| 7 | Beer Caroline Stark Chief Business Officer | 2025-10-03 16:14:59 | 255,000 0 | 255,000 | Form 4 |
| 8 | 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 | 2025-11-24 17:43:18 | 0 159,033 | 159,033 | Form 4 |
| 9 | McKee Charlotte Chief Medical Officer | 2025-02-10 16:05:03 | 148,536 0 | 148,536 | Form 4 |
| 10 | Fitzpatrick Jennifer Chief Legal Officer | 2025-12-09 16:57:04 | 61,185 0 | 61,185 | Form 4 |
| 11 | Ridloff Elena CFO & Head of Corp. Dev. | 2025-09-03 17:16:21 | 38,532 0 | 38,532 | Form 4 |
| 12 | Clancy Paul J Director | 2025-06-16 17:06:56 | 19,959 0 | 19,959 | Form 4 |
| 13 | Fleming Harold Edward Director | 2025-06-16 17:07:11 | 19,959 0 | 19,959 | Form 4 |
| 14 | Resnick Joshua Director | 2025-06-16 17:07:30 | 19,959 0 | 19,959 | Form 4 |
| 15 | Ruddy Marcella K. Director | 2025-06-16 17:07:48 | 19,959 0 | 19,959 | Form 4 |
| 16 | Stelzer Laurie Director | 2025-06-16 17:08:06 | 19,959 0 | 19,959 | Form 4 |
| 17 | Viney Joanne L. Director | 2025-06-16 17:08:46 | 19,959 0 | 19,959 | Form 4 |
| 18 | Iancovici Lucian Director | 2025-02-06 21:15:33 | 0 0 | 0 | Form 3 |