X0407 4 2023-05-04 0 0001380106 RAPID MICRO BIOSYSTEMS, INC. RPID 0001702957 Schwartz Jeffrey Lawrence C/O BAIN CAPITAL LIFE SCIENCES INVESTORS 200 CLARENDON STREET BOSTON MA 02116 1 0 1 0 0 Stock Option (Right to Buy) 0.8705 2023-05-04 4 A 0 25000 0.00 A 2033-05-03 Class A Common Stock 25000 25000 D The option shall vest and become exercisable in full on the earlier of (i) the first anniversary of the Grant Date, or (ii) the day immediately prior to the date of the next annual meeting of the stockholders of the Company provided that the Reporting Person remains in continuous service on such vesting date. /s/ Jeffrey Schwartz 2023-05-05