Sean M Wirtjes Form 3 RAPID MICRO BIOSYSTEMS / SEAN M WIRTJES ownership change

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

WIRTJES SEAN M

(Last) (First) (Middle)

C/O RAPID MICRO BIOSYSTEMS, INC.

1001 PAWTUCKET BOULEVARD WEST, SUITE 280

(Street)

LOWELL, MA 01854

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
07/14/2021

3. Issuer Name and Ticker or Trading Symbol
RAPID MICRO BIOSYSTEMS, INC. [ RPID ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
Chief Financial Officer

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Common Stock	141,631	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	(1)	03/14/2031	Class A Common Stock	24,360	10.85	D
Stock Option (Right to Buy)	(2)	07/28/2030	Class A Common Stock	96,624	0.75	D
Stock Option (Right to Buy)	(3)	09/11/2028	Class A Common Stock	92,886	1	D

Explanation of Responses:

1. The option vests and becomes exercisable in 48 substantially equal monthly installments with the first installment vesting on April 9, 2021.

2. This option was originally granted for 107,860 shares and vested and became exercisable in 48 substantially equal monthly installments with the first installment vesting on August 29, 2020.

3. The option was originally granted for 223,282 shares and vested and became exercisable as to 25% of the underlying shares on September 12, 2019 and in 36 substantially equal monthly installments thereafter.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Jonathan Paris, Attorney-in-Fact for Sean M. Wirtjes	07/14/2021
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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