SION Insider Trading Activity and SEC Form 4 Filings
SION insider trading summary
Over the past 12 months, insiders at Sionna Therapeutics, Inc. (SION) reported 291 sales worth $365.0M by 13 insiders and no open-market purchases on SEC Form 4. Net insider selling was $365.0M.
Latest SION insider buys and sells
| Date | Insider | Role | Type | Value |
|---|---|---|---|---|
| Sep 17, 2026 | RA Capital Healthcare Fund LP | Director | Sell | $252K (33,800 @ $7.46) |
| Sep 17, 2026 | RA Capital Nexus Fund, L.P. | Director | Sell | $252K (33,800 @ $7.46) |
| Sep 17, 2026 | Ra Capital Management, L.P. | Insider | Sell | $252K (33,800 @ $7.46) |
| Sep 17, 2026 | RA Capital Nexus Fund III, L.P. | Director | Sell | $21.6M (3,415,011 @ $6.32) |
| Sep 17, 2026 | Peter Kolchinsky | Director | Sell | $21.6M (3,415,011 @ $6.32) |
| Sep 17, 2026 | RA Capital Healthcare Fund LP | Director | Sell | $21.6M (3,415,011 @ $6.32) |
| Sep 17, 2026 | Ra Capital Management, L.P. | Insider | Sell | $21.6M (3,415,011 @ $6.32) |
| Sep 17, 2026 | Rajeev M. Shah | Director | Sell | $21.6M (3,415,011 @ $6.32) |
| Sep 17, 2026 | RA Capital Nexus Fund, L.P. | Director | Sell | $21.6M (3,415,011 @ $6.32) |
| Sep 17, 2026 | RA Capital Nexus Fund III, L.P. | Director | Sell | $252K (33,800 @ $7.46) |
Source: SEC Form 4 filings. Open-market purchases (code P) and sales (code S) only; option exercises, grants and gifts are excluded.