X0508 4 2025-12-16 0 0001453687 Cartesian Therapeutics, Inc. RNAC 0002101801 Bot Adrian Ion C/O CARTESIAN THERAPEUTICS, INC. 7495 NEW HORIZON WAY FREDRICK MD 21703 1 0 0 0 0 Common Stock 2025-12-16 4 A 0 5800 0 A 5800 D Stock Option (Right to Buy) 8.29 2025-12-16 4 A 0 17200 0 A 2035-12-15 Common Stock 17200 17200 D Each Restricted Stock Unit represents a contingent right to receive one share of common stock, which will vest in three equal annual installments following the date of grant so that the underlying shares will be fully vested on December 16, 2028. This award will vest in 36 equal monthly installments, so that it shall be fully vested on December 16, 2028. /s/ Matthew Bartholomae, Attorney-in-fact for Adrian Ion Bot 2025-12-18