Form 4 Filing by Cartesian Therapeutics, Inc.

This Form 4 filing details transactions by reporting owners Hoge Elizabeth and Seven One Eight Three Four Irrevocable Trust of Cartesian Therapeutics, Inc. (RNAC). On April 2, 2026, the Trust converted Series A Non-Voting Convertible Preferred Stock into 758,001 shares of Common Stock. This conversion is noted as a beneficial ownership limitation. Additionally, the filing indicates that Hoge Elizabeth acquired 758,001 shares of Common Stock with 0.0 price per share, resulting in 5,313,261 shares post-transaction. The Trust holds 506,999 shares of Common Stock, owned by spouse. The conversion of preferred stock into common stock is part of the merger consideration and private placement from November 2023.