RAPID MICRO BIOSYSTEMS, INC. — Director's Dealing 2025

Jul 10, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: RAPID MICRO BIOSYSTEMS, INC. (RPID)
CIK: 0001380106
Period of Report: 2025-07-08

Reporting Person: Spignesi Robert G. Jr. (Director, PRESIDENT AND CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-07-08	Class A Common Stock	M	25144	—	Acquired	897510	Direct
2025-07-08	Class A Common Stock	S	10824	$3.5127	Disposed	886686	Direct
2025-07-09	Class A Common Stock	M	25144	—	Acquired	911830	Direct
2025-07-09	Class A Common Stock	S	11247	$3.5103	Disposed	900583	Direct
2025-07-10	Class A Common Stock	M	25145	—	Acquired	925728	Direct
2025-07-10	Class A Common Stock	S	11617	$3.398	Disposed	944015	Direct

Footnotes

F1: Shares were acquired upon satisfaction of performance criteria underlying previously granted performance restricted stock units.

F2: The sales reported on this Form 4 represent shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of performance restricted stock units.

F3: Includes 29,904 shares acquired under the Rapid Micro Biosystems, Inc. employee stock purchase plan on March 14, 2025.