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SION stock fell 8.8% despite better-than-expected earnings due to major insider selling.
Sionna Therapeutics (SION) shares dropped 8.8% to $32.49 on November 5, 2025, despite reporting a quarterly loss of $0.46 per share—better than the expected $0.52.
The decline followed insider selling, including CEO Michael Cloonan’s sale of 99,800 shares and Ra Capital’s exit of 311,000 shares, with insiders collectively selling $43.4 million in stock over 90 days.
Analysts maintain a mixed outlook with a consensus “moderate buy” and a $38.00 target.
The company, focused on cystic fibrosis treatments, has a $1.55 billion market cap and a negative P/E ratio.
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Las acciones de SION cayeron un 8,8% a pesar de las ganancias superiores a las esperadas debido a las importantes ventas internas.