On April 29, 2025, Windtree Therapeutics, Inc. entered into a Securities Purchase Agreement for a private placement of 3,125 shares of Series D Convertible Preferred Stock, raising approximately $2.5 million, set to close on April 30, 2025. The shares convert at an initial price of $1.368 each and will include a 10% annual dividend, increasing to 18% in certain conditions.