RA Capital Management, L.P., Director, 10% Owner at Sionna Therapeutics, Inc. (SION), sold 3,448,811 shares at $6.32 ($21.8M) on 2026-09-17, disclosed to the SEC on 2026-09-21.
Open-market sale of $21.8M SION by Director, 10% Owner. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Nothing distinguishes this filing.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $6.32 | 3,415,011 | $21.6M | 98.8% |
| 2 | $7.46 | 33,800 | $252K | 1.2% |
| Total | $6.33 avg | 3,448,811 | $21.8M | 100% |
| Filing → |
| ARTV | BUY | 2026-07-28 | $413K | — | Filing → |
| ARTV | BUY | 2026-07-23 | $58K | — | Filing → |
| ARTV | BUY | 2026-07-23 | $2.6M | — | Filing → |