SION
Sionna Therapeutics, Inc.
NASDAQ · Healthcare · Biotechnology · US
$7.18
+6.37%0
Insider buys (3m)
5
Insider sells (3m)
-$18.7M
Net value (3m)
-80.1%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Jul 9, 2026 | Thompson Peter A. · director | Sale | 85,918 | $45 |
| Jul 9, 2026 | ORBIMED ADVISORS LLC · director | Sale | 85,918 | $45 |
| Jul 7, 2026 | Fitzpatrick Jennifer · officer: Chief Legal Officer | Sale | 10,250 | $44 |
| Jul 7, 2026 | Fitzpatrick Jennifer · officer: Chief Legal Officer | M-Exempt | 10,250 | $6.11 |
| Jul 2, 2026 | Thompson Peter A. · director | Sale | 115,844 | $46 |
| Jul 2, 2026 | ORBIMED ADVISORS LLC · director | Sale | 115,844 | $46 |
| Jun 18, 2026 | Stelzer Laurie · director | A-Award | 17,340 | $37 |
| Jun 18, 2026 | Thompson Peter A. · director | A-Award | 17,340 | $37 |
| Jun 18, 2026 | Viney Joanne L. · director | A-Award | 17,340 | $37 |
| Jun 18, 2026 | RA CAPITAL MANAGEMENT, L.P. · director, 10 percent owner: | A-Award | 17,340 | $37 |
| Jun 18, 2026 | Booth Bruce · director | A-Award | 17,340 | $37 |
| Jun 18, 2026 | Clancy Paul J · director | A-Award | 17,340 | $37 |
| Jun 18, 2026 | Resnick Joshua · director | A-Award | 17,340 | $37 |
| Jun 18, 2026 | Fleming Harold Edward · director | A-Award | 17,340 | $37 |
| Jun 18, 2026 | Ruddy Marcella K. · director | A-Award | 17,340 | $37 |
| May 29, 2026 | ORBIMED ADVISORS LLC · director | Sale | 101 | $44 |
| May 29, 2026 | Thompson Peter A. · director | Sale | 101 | $44 |
| May 11, 2026 | Thompson Peter A. · director | Sale | 48,546 | $45 |
| May 11, 2026 | ORBIMED ADVISORS LLC · director | Sale | 184,639 | $46 |
| May 11, 2026 | ORBIMED ADVISORS LLC · director | Sale | 59,767 | $45 |
| May 11, 2026 | ORBIMED ADVISORS LLC · director | Sale | 48,546 | $45 |
| May 11, 2026 | Thompson Peter A. · director | Sale | 184,639 | $46 |
| May 11, 2026 | Thompson Peter A. · director | Sale | 59,767 | $45 |
| Apr 21, 2026 | ORBIMED ADVISORS LLC · director | Sale | 2,948 | $45 |
| Apr 21, 2026 | Thompson Peter A. · director | Sale | 52,397 | $45 |
| Apr 21, 2026 | Thompson Peter A. · director | Sale | 2,948 | $45 |
| Apr 21, 2026 | ORBIMED ADVISORS LLC · director | Sale | 52,397 | $45 |
| Apr 16, 2026 | ORBIMED ADVISORS LLC · director | Sale | 47,814 | $45 |
| Apr 16, 2026 | ORBIMED ADVISORS LLC · director | Sale | 235,863 | $45 |
| Apr 16, 2026 | Thompson Peter A. · director | Sale | 47,814 | $45 |
Institutional positioning
13F filings over the trailing two quarters
New 33Increased 41Reduced 31Sold out 120
| Filer | Action | Shares | Filed |
|---|---|---|---|
| RA CAPITAL MANAGEMENT, L.P. | Unchanged | 9,905,045 | May 15, 2026 |
| TPG GP A, LLC | Reduced | 6,494,962 | May 15, 2026 |
| ORBIMED ADVISORS LLC | Reduced | 3,530,702 | May 15, 2026 |
| VIKING GLOBAL INVESTORS LP | Unchanged | 3,195,181 | May 15, 2026 |
| ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC | Unchanged | 2,995,602 | May 14, 2026 |
| ENAVATE SCIENCES GP, LLC | Unchanged | 2,478,030 | May 15, 2026 |
| JPMORGAN CHASE & CO | Increased | 1,465,014 | May 13, 2026 |
| JENNISON ASSOCIATES LLC | Increased | 1,451,220 | May 6, 2026 |
| BLACKROCK, INC. | Increased | 1,295,867 | May 13, 2026 |
| CITADEL ADVISORS LLC | Increased | 1,166,931 | May 15, 2026 |
| CITADEL ADVISORS LLC | Reduced | 1,156,036 | Sep 2, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 1,029,497 | May 15, 2026 |
| DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) | Unchanged | 970,590 | May 15, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 756,376 | May 15, 2026 |
| STATE STREET CORP | Increased | 756,227 | May 15, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Jul 9, 2026