Updated Jul 16, 2026 · Last SEC filing 2026-07-09
Sionna Therapeutics, Inc. (SION) has filed 20 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-09. 2 Form 8-K material event filings were reported by SION in the last 90 days. 3 Form 144 notices of proposed sale were filed for SION stock. InsiderAlpha tracks every SION SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Pharmaceutical Preparations (SIC 2834) |
|---|---|
| SEC CIK | 0002036042 |
| Form 4 filings (90d) | 20 |
|---|---|
| Form 8-K filings (90d) | 2 |
| Form 144 notices (90d) | 3 |
| Latest Form 4 filing | 2026-07-09 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| ORBIMED ADVISORS LLC | Director | S — Open-market sale | 85.9K | $44.86 | $3.85M | SEC | |
| Thompson Peter A. | Director | S — Open-market sale | 85.9K | $44.86 | $3.85M | SEC | |
| Fitzpatrick Jennifer | Chief Legal Officer | M — Option exercise | 10.2K | $6.11 | $63K | SEC | |
| Fitzpatrick Jennifer | Chief Legal Officer | S — Open-market sale | 10.2K | $43.60 | $447K | SEC | |
| ORBIMED ADVISORS LLC | Director | S — Open-market sale | 115.8K | $45.50 | $5.27M | SEC | |
| Thompson Peter A. | Director | S — Open-market sale | 115.8K | $45.50 | $5.27M | SEC | |
| Thompson Peter A. | Director | S — Open-market sale | 101 | $44.49 | $4K | SEC | |
| ORBIMED ADVISORS LLC | Director | S — Open-market sale | 101 | $44.49 | $4K | SEC | |
| Thompson Peter A. | Director | S — Open-market sale | 184.6K | $46.22 | $8.53M | SEC | |
| ORBIMED ADVISORS LLC | Director | S — Open-market sale | 184.6K | $46.22 | $8.53M | SEC | |
| Thompson Peter A. | Director | S — Open-market sale | 59.8K | $44.58 | $2.66M | SEC | |
| ORBIMED ADVISORS LLC | Director | S — Open-market sale | 59.8K | $44.58 | $2.66M | SEC | |
| ORBIMED ADVISORS LLC | Director | S — Open-market sale | 48.5K | $44.61 | $2.17M | SEC | |
| Thompson Peter A. | Director | S — Open-market sale | 48.5K | $44.61 | $2.17M | SEC | |
| ORBIMED ADVISORS LLC | Director | S — Open-market sale | 2.9K | $44.52 | $131K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Sionna Therapeutics, Inc. (SION). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Thompson Peter A. | 9 | $24.97M |
| ORBIMED ADVISORS LLC | 8 | $24.97M |
| Fitzpatrick Jennifer | 3 | $509K |
| Clancy Paul J | 1 | — |
| Booth Bruce | 1 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in SION insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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