Gurinder Grewal - 19 Jul 2021 Form 4 Insider Report for RAPID MICRO BIOSYSTEMS, INC. (RPID)

Role: 10%+ Owner
Signature: /s/ Jonathan Paris, Attorney-in-Fact for Gurinder Grewal
Issuer symbol: RPID
Transactions as of: 19 Jul 2021
Net transactions value: $0
Form type: 4
Filing time: 20 Jul 2021, 20:16:25 UTC
Previous filing: 14 Jul 2021
Next filing: 28 Jul 2022
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	RPID	Class A Common Stock	Conversion of derivative security		+27,777	+10%		294,990	19 Jul 2021	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	RPID	Series D1 Preferred Stock	Conversion of derivative security		-138,888	-100%		0	19 Jul 2021	Class A Common Stock	27,777		Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Gurinder Grewal is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id	Content
F1	The Series D1 Preferred Stock are convertible at any time, at the holder's election and have no expiration date. Each share of Series D1 Preferred Stock automatically converted into 0.20 shares of the Issuer's Class A Common Stock upon the closing of the Issuer's initial public offering.