X0306 4 2021-07-14 0 0001380106 RAPID MICRO BIOSYSTEMS, INC. RPID 0001702957 Schwartz Jeffrey Lawrence C/O BAIN CAPITAL LIFE SCIENCES INVESTORS LLC, 200 CLARENDON STREET BOSTON MA 02116 1 0 1 0 Stock Option (Right to Buy) 20.00 2021-07-14 4 A 0 25000 0.00 A 2031-07-13 Class A Common Stock 25000 25000 D This option vests and becomes exercisable, subject to the Reporting Person's continued service to the Issuer's Board, in 36 substantially equal monthly installments with the first installment vesting on August 14, 2021. /s/ Jeffrey Schwartz 2021-07-16