X0306 4 2021-02-09 0 0001838108 RMG Acquisition Corp. III RMGC 0001842049 RMG Sponsor III, LLC C/O RMG ACQUISITION CORP. III 50 WEST STREET, SUITE 40C NEW YORK, NY 10006 0 0 1 0 0001764521 MKC Investments LLC C/O RMG ACQUISITION CORP. III 50 WEST STREET, SUITE 40C NEW YORK, NY 10006 0 0 1 0 0001764088 Carpenter David James C/O RMG ACQUISITION CORP. III 50 WEST STREET, SUITE 40C NEW YORK, NY 10006 1 1 1 0 Chairman 0001763992 Mancini Robert S. C/O RMG ACQUISITION CORP. III 50 WEST STREET, SUITE 40C NEW YORK, NY 10006 1 1 1 0 Chief Executive Officer 0001732329 KASSIN PHILIP C/O RMG ACQUISITION CORP. III 50 WEST STREET, SUITE 40C NEW YORK, NY 10006 1 1 1 0 President and COO Warrants 11.50 2021-02-09 4 P 0 8216330 1.50 A Class A Common Stock 8216330 8216330 I See footnote The warrants are not currently exercisable and will only become exercisable on the later of (a) 30 days after the completion of the Issuer's initial business combination and (b) February 9, 2022. Philip Kassin is the record holder of the warrants reported herein. MKC Investments LLC is the sole managing member of RMG Sponsor III, LLC, and Messrs. Carpenter, Mancini and Kassin are the managing members of MKC Investments LLC. Each of MKC Investments LLC, RMG Sponsor III, LLC and Messrs. Carpenter and Mancini disclaim beneficial ownership over the warrants reported herein. RMG Sponsor III, LLC; By: MKC Investments LLC, its sole managing member; By: /s/ Philip Kassin; Title: President and Chief Operating Officer 2021-02-11 MKC Investments LLC; By: /s/ Philip Kassin; Title: President and Chief Operating Officer 2021-02-11 /s/ D. James Carpenter 2021-02-11 /s/ Robert S. Mancini 2021-02-11 /s/ Philip Kassin 2021-02-11