Michael Cloonan, President & CEO at Sionna Therapeutics, Inc. (SION), sold 25,000 shares at $22.75 ($569K) on 2025-08-20, disclosed to the SEC on 2025-08-21.
Scheduled sale ($569k) by President & CEO under a pre-arranged 10b5-1 plan. Pre-set trade — not a discretionary signal on the stock.
Nothing distinguishes this filing.
| Filing → |
| SION | SELL | 2025-09-30 | $1.5M | — | Filing → |
| SION | SELL | 2025-08-28 | $1.2M | — | Filing → |
| SAGE | SELL | 2019-05-24 | $4.4M | — | Filing → |