Michael Cloonan, President & CEO at Sionna Therapeutics, Inc. (SION), sold 50,200 shares at $31.11 ($1.6M) on 2025-10-15, disclosed to the SEC on 2025-10-17.
Scheduled sale ($1.6M) by President & CEO under a pre-arranged 10b5-1 plan. Pre-set trade — not a discretionary signal on the stock.
Nothing distinguishes this filing.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $31.11 | 14,775 | $460K | 29.3% |
| 2 | $31.11 | 14,775 | $460K | 29.3% |
| 3 | $31.46 | 10,225 | $322K | 20.5% |
| 4 | $31.46 | 10,225 | $322K | 20.5% |
| 5 | $34.00 | 200 | $7K | 0.4% |
| Total | $31.26 avg | 50,200 |
| $1.6M |
| 100% |
| Filing → |
| SION | SELL | 2025-08-28 | $1.2M | — | Filing → |
| SION | SELL | 2025-08-21 | $569K | — | Filing → |
| SAGE | SELL | 2019-05-24 | $4.4M | — | Filing → |