SEC Form 4 · accession 0001644348-26-000007
Sionna Therapeutics, Inc. · SION
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Laurie Stelzer
Director
Period of report
Jun 17, 2026
Accepted (ET)
Jun 18, 2026 · 5:58 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0002036042
Table I — non-derivative securities
No Table I lines on this filing.
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Non-Qualified Stock Option (right to buy)F1 | $36.73 | Jun 17, 2026 | A | 17,340 | A | — | Jun 16, 2036 | Common Stock | 17,340 | 17,340 | D |
Explanation of responses
- F1This option vests in full upon the earlier of June 17, 2027 or the date of the next annual meeting of Sionna Therapeutics, Inc., subject to the Reporting Person's continued service on such vesting date.