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SEC FORM 3 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*
Longitude Prime Partners, LLC
(Last) (First) (Middle)
2740 SAND HILL ROAD, SECOND FLOOR
(Street)
MENLO PARK CA 94025
(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
07/19/2021 		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 X 10% Owner
Officer (give title below) Other (specify below)
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X 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 150,000(1) I Held by Longitude Prime Fund, L.P.(2)
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
1. Name and Address of Reporting Person*
Longitude Prime Partners, LLC
(Last) (First) (Middle)
2740 SAND HILL ROAD, SECOND FLOOR
(Street)
MENLO PARK CA 94025
(City) (State) (Zip)
1. Name and Address of Reporting Person*
Longitude Prime Fund, L.P.
(Last) (First) (Middle)
2740 SAND HILL ROAD, SECOND FLOOR
(Street)
MENLO PARK CA 94025
(City) (State) (Zip)
Explanation of Responses:
1. Represents shares purchased in the Issuer's initial public offering. Not included on this Form 3 are an additional 3,407,952 shares of Class A Common Stock and warrants to purchase an aggregate of 634,595 shares of Class A Common Stock held by Longitude Venture Partners II, L.P. ("LVP II"). LVP II, Longitude Capital Partners II, LLC, Patrick G. Enright and Juliet Tammenoms Bakker have separately filed a Form 4 in connection with the acquisition of the shares of Class A Common Stock described in this Form.
2. The securities are held directly by Longitude Prime Fund, L.P. ("LPF"). Longitude Prime Partners, LLC ("LPP"), the general partner of LPF, may be deemed to have voting and investment power with respect to the shares held by LPF. Mr. Enright and Ms. Tammenoms Bakker are the managing members of LPP and may be deemed to have voting, investment and dispositive power over the shares held by LPF. LPP and each of Mr. Enright and Ms. Tammenoms Bakker disclaim beneficial ownership of such shares except to the extent of their respective pecuniary interests therein.
Remarks:
Longitude Prime Partners, LLC, By: /s/ Patrick Enright, managing member 07/20/2021
Longitude Prime Fund, L.P., By: /s/ Patrick Enright, managing member of the general partner 07/20/2021
** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
                                                                      Exhibit 24

                               POWER OF ATTORNEY

        With respect to holdings of and transactions in securities issued by
Rapid Micro Biosystems, Inc. (the "Company"), the undersigned hereby constitutes
and appoints the individuals named on Schedule A attached hereto and as may be
amended from time to time, or any of them signing singly, with full power of
substitution and resubstitution, to act as the undersigned's true and lawful
attorney-in-fact to:

        1.  prepare, execute in the undersigned's name and on the undersigned's
            behalf, and submit to the United States Securities and Exchange
            Commission (the "SEC") a Form ID, including amendments thereto, and
            any other documents necessary or appropriate to obtain and/or
            regenerate codes and passwords enabling the undersigned to make
            electronic filings with the SEC of reports required by Section 16(a)
            of the Securities Exchange Act of 1934, as amended, or any rule or
            regulation of the SEC;

        2.  execute for and on behalf of the undersigned, Forms 3, 4, and 5 in
            accordance with Section 16 of the Securities Exchange Act of 1934,
            as amended, and the rules thereunder;

        3.  do and perform any and all acts for and on behalf of the undersigned
            which may be necessary or desirable to complete and execute any such
            Form 3, 4, or 5, complete and execute any amendment or amendments
            thereto, and timely file such form with the SEC and any stock
            exchange or similar authority; and

        4.  take any other action of any type whatsoever in connection with the
            foregoing which, in the opinion of such attorney-in-fact, may be of
            benefit to, in the best interest of, or legally required by, the
            undersigned, it being understood that the documents executed by such
            attorney-in-fact on behalf of the undersigned pursuant to this Power
            of Attorney shall be in such form and shall contain such terms and
            conditions as such attorney-in-fact may approve in such attorney-in-
            fact's discretion.

        The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution and resubstitution or revocation, hereby ratifying and confirming
all that such attorney-in-fact, or such attorneys-in-fact substitute or
substitutes, shall lawfully do or cause to be done by virtue of this Power of
Attorney and the rights and powers herein granted.

        The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Securities Exchange Act of 1934, as amended.

        This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 16th day of March, 2021.


                                        Signature:   /s/ David Hirsch
                                                     ----------------
                                        Print Name:  David Hirsch



                                 Schedule A

        Individuals Appointed as Attorney-in-Fact with Full Power of
Substitution and Resubstitution


Robert Spignesi
Sean Wirtjes
Jonathan Paris