Over the past year there were no insider purchases at Sionna Therapeutics, Inc.. Ten insiders sold roughly $166.7 million instead.
Keep in mind most insider selling is routine — stock-based pay has to be converted to cash at some point.
On the institutional side, 147 funds reported holding SION at the end of Q2 2026, and more funds bought than sold. Zooming out by quarter: 5 quarters in a row of net selling by insiders. Insiders bought in 2 of the last 7 full quarters.
| Filed | Insider | Role | Type | Shares | Price | Value | Source |
|---|---|---|---|---|---|---|---|
| Jul 9, 2026 | Thompson Peter A. | Director | Sell | 85,918 | $44.86 | $3.9M | SEC |
| Jul 9, 2026 | OrbiMed Capital GP VIII LLC | Director | Sell | 85,918 | $44.86 | $3.9M | SEC |
| Jul 7, 2026 | Fitzpatrick Jennifer | Executive Officer | Sell | 10,250 | $43.60 | $447K | SEC |
| Jul 2, 2026 | Thompson Peter A. | Director | Sell | 115,844 | $45.50 | $5.3M | SEC |
| Jul 2, 2026 | ORBIMED ADVISORS LLC | Director | Sell | 115,844 | $45.50 | $5.3M | SEC |
| May 29, 2026 | Thompson Peter A. | Director | Sell | 101 | $44.49 | $4K | SEC |
| May 29, 2026 | ORBIMED ADVISORS LLC | Director | Sell | 101 | $44.49 | $4K | SEC |
| May 11, 2026 | Thompson Peter A. | Director | Sell | 184,639 | $46.22 | $8.5M | SEC |
| May 11, 2026 | Thompson Peter A. | Director | Sell | 59,767 | $44.58 | $2.7M | SEC |
| May 11, 2026 | Thompson Peter A. | Director | Sell | 48,546 | $44.61 | $2.2M | SEC |
| May 11, 2026 | ORBIMED ADVISORS LLC | Director | Sell | 59,767 | $44.58 | $2.7M | SEC |
| May 11, 2026 | ORBIMED ADVISORS LLC | Director | Sell | 48,546 | $44.61 | $2.2M | SEC |
| May 11, 2026 | ORBIMED ADVISORS LLC | Director | Sell | 184,639 | $46.22 | $8.5M | SEC |
| Apr 21, 2026 | Thompson Peter A. | Director | Sell | 2,948 | $44.52 | $131K | SEC |
| Apr 21, 2026 | ORBIMED ADVISORS LLC | Director | Sell | 2,948 | $44.52 | $131K | SEC |
In the last 12 months Sionna Therapeutics, Inc. insiders made open-market purchases worth about $0 and sales worth about $166.7 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
The most recent open-market insider trade in SION was filed on 2026-07-09.
147 investment managers reported holding SION in SEC Form 13F filings for Q2 2026.
No congressional trades in SION were reported in the past two years. The full list is free on CapitalSnitch.
Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1). Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).