Michael Cloonan's Stock Transactions and Plan Adoption at Sionna Therapeutics

The filing details the stock transactions and plan adoption by Michael Cloonan, a director and officer at Sionna Therapeutics, Inc. On October 16, 2025, Cloonan exercised stock options to acquire 200 common shares. The plan was adopted on May 21, 2025. Additionally, the filing reports significant sales of common shares by Cloonan over the past three months, totaling over $2.3 million. These transactions were executed under a 10b5-1 trading plan, indicating pre-planned sales. The filing highlights the ongoing financial activities of a key executive at Sionna Therapeutics, providing insights into insider trading patterns and corporate governance.