Jon Winkelried, 10% Owner at Sionna Therapeutics, Inc. (SION), sold 250,000 shares at $40.00 ($10.0M) on 2026-01-22, disclosed to the SEC on 2026-01-26.
Open-market sale of $10.0M SION by 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.
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