Company filings profile · CIK 0002036042
Sionna Therapeutics, Inc. — SEC filings & insider activity.
Real, source-linked SEC EDGAR activity for Sionna Therapeutics, Inc. (SION): 28 filings in the last 90 days vs 18 in the prior 90 (filing-velocity rising ↑ · 1.56×). Latest material 8-K events, insider Form-4 transactions, and periodic reports — monitored for change.
✔ Verified against the public SEC EDGAR filing record as of Jun 21, 2026. Source-linked, daily-refreshed.
Material 8-K events — Sionna Therapeutics, Inc.
8-K disclosures decoded by item code (the material events: agreements, results, control/management changes, impairments, restatements).
| Filed | Event | |
|---|---|---|
| Jun 18, 2026 | Item 5.07 | ↗ |
| May 12, 2026 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Mar 2, 2026 | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
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Insider transactions (Form 4 / 3 / 5)
Recent filings
| Filed | Form | Detail | |
|---|---|---|---|
| Jun 18, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Jun 18, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Jun 18, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Jun 18, 2026 | 4 | ↗ | |
| Jun 18, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Jun 18, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Jun 18, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Jun 18, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Jun 18, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Jun 18, 2026 | 8-K | Item 5.07 | ↗ |
| Jun 1, 2026 | 144/A | ↗ | |
| May 29, 2026 | 4 | ↗ | |
| May 29, 2026 | 4 | ↗ | |
| May 29, 2026 | 144 | ↗ | |
| May 15, 2026 | SCHEDULE 13G/A | ↗ | |
| May 12, 2026 | SCHEDULE 13G/A | ↗ | |
| May 12, 2026 | 10-Q | 10-Q | ↗ |
| May 12, 2026 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| May 11, 2026 | 4 | ↗ | |
| May 11, 2026 | 4 | ↗ | |
| Apr 27, 2026 | ARS | ARS | ↗ |
| Apr 27, 2026 | DEFA14A | DEFA14A | ↗ |
| Apr 27, 2026 | DEF 14A | DEF 14A | ↗ |
| Apr 21, 2026 | 4 | ↗ | |
| Apr 21, 2026 | 4 | ↗ | |
| Apr 20, 2026 | SCHEDULE 13D/A | ↗ | |
| Apr 16, 2026 | 4 | ↗ | |
| Apr 16, 2026 | 4 | ↗ | |
| Mar 6, 2026 | 4 | PRIMARY DOCUMENT | ↗ |
| Mar 5, 2026 | 144 | ↗ | |
| Mar 2, 2026 | S-8 | S-8 | ↗ |
| Mar 2, 2026 | S-3ASR | S-3ASR | ↗ |
| Mar 2, 2026 | 10-K | 10-K | ↗ |
| Mar 2, 2026 | 8-K | Results of Operations (earnings); Financial Statements and Exhibits | ↗ |
| Feb 4, 2026 | 4 | ↗ | |
| Feb 4, 2026 | 4 | ↗ | |
| Jan 26, 2026 | 4 | ↗ | |
| Jan 22, 2026 | 144 | ↗ | |
| Jan 22, 2026 | 144 | ↗ | |
| Jan 6, 2026 | 4 | PRIMARY DOCUMENT | ↗ |