// company-profile
Sionna Therapeutics, Inc.
SION// activity-summary
Recent insider activity is bullish. Over the last 30 days, 9 insiders purchased shares. Buying was led by Clancy Paul J.
// 90-day insight
Over the last 90 days, Sionna Therapeutics, Inc. insiders bought $0 across 9 transactions with no open-market sales.
- Most active insider: Thompson Peter A. with 10 transactions totaling $38.8M.
- Largest single sale: $10.5M by Thompson Peter A. on Apr 15, 2026.
- 100% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Sionna Therapeutics, Inc. as of 2026-03-31
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 17, 2026 | Clancy Paul J | SION | Award | 17,340 | $0.00 | $0K |
| Jun 17, 2026 | RA CAPITAL MANAGEMENT, L.P. | SION | Award | 17,340 | $0.00 | $0K |
| Jun 17, 2026 | Thompson Peter A. | SION | Award | 17,340 | $0.00 | $0K |
| Jun 17, 2026 | Resnick Joshua | SION | Award | 17,340 | $0.00 | $0K |
| Jun 17, 2026 | Stelzer Laurie | SION | Award | 17,340 | $0.00 | $0K |
45 more transactions hidden
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