RA Capital Healthcare Fund LP Sells Sionna Therapeutics Shares

RA Capital Healthcare Fund LP, a director and 10% stockholder of Sionna Therapeutics, Inc., has filed a Form 144 indicating its intent to sell 3,624 shares of Sionna Therapeutics' common stock. The shares were acquired on February 2, 2022, through a private transaction. Additionally, RA Capital Healthcare Fund LP recently sold 14,116 shares of Sionna Therapeutics' common stock on October 24, 2025, for a total value of $557,582. The filing was signed by Rajeev Shah on October 28, 2025. The shares are traded on the NASDAQ GM, and the broker involved in the transaction is BTIG, LLC.