Michael Cloonan, President & CEO at Sionna Therapeutics, Inc. (SION), sold 176,705 shares at $35.63 ($6.4M) on 2025-10-21, disclosed to the SEC on 2025-10-22.
Scheduled sale ($6.4M) 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 | $34.44 | 13,324 | $459K | 7.2% |
| 2 | $34.44 | 13,324 | $459K | 7.2% |
| 3 | $35.63 | 30,049 | $1.1M | 16.7% |
| 4 | $35.63 | 30,049 | $1.1M | 16.7% |
| 5 | $36.60 | 22,895 | $838K | 13.1% |
| 6 | $37.31 | 33,532 |
| $1.3M |
| 19.6% |
| 7 | $37.31 | 33,532 | $1.3M | 19.6% |
| Total | $36.21 avg | 176,705 | $6.4M | 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 → |