Exhibit 99.1 Cartesian Therapeutics Reports First Quarter 2024 Financial Results and Provides Business Update Topline data from Phase 2b trial of Descartes-08, the Company’s potential first-in-class mRNA CAR-T cell therapy, in myasthenia gravis on track for mid-2024 On track to dose first patient in Phase 2 trial of Descartes-08 in SLE in 2Q24, as well as Phase 2 basket studies in additional autoimmune indications in 2H24 New headquarters expected to support scale of wholly owned, in-house cGMP manufacturin ...