Document:

Exhibit 4.1

 

FULLY-PAID
AND NON-ASSESSABLE SHARES OF CLASS A COMMON STOCK OF Rapid Micro Biosystems, Inc. (hereinafter called the “Company”),
transferable on the books of the Company in person or by duly authorized attorney, upon surrender of this Certificate properly endorsed.
This Certificate and the shares represented hereby, are issued and shall be held subject to all of the provisions of the Restated Certificate
of Incorporation, and the Amended and Restated Bylaws, of the Company (copies of which are on file with the Company and with the Transfer
Agent), to all of which each holder, by acceptance hereof, assents. This Certificate is not valid unless countersigned and registered
by the Transfer Agent and Registrar. Witness the facsimile seal of the Company and the facsimile signatures of its duly authorized
officers. CLASS A COMMON STOCK PAR VALUE $0.01 CLASS A COMMON STOCK SEE REVERSE FOR CERTAIN DEFINITIONS Certificate
Number Shares . RAPID MICRO BIOSYSTEMS, INC. INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE FACSIMILE SIGNATURE TO COME
FACSIMILE SIGNATURE TO COME President Secretary By AUTHORIZED SIGNATURE 12/29/2006 DEL AWAR E CO R PO RATE RAPID MICRO BIOSYSTEMS,
INC. ZQ|CERT#|COY|CLS|RGSTRY|ACCT#|TRANSTYPE|RUN#|TRANS# XXXXXX XX X DD-MMM-YYYY * * 000000* * * * * * * * * * * * * * * * * * * * *
000000* * * * * * * * * * * * * * * * * * * * * 000000* * * * * * * * * * * * * * * * * * * * * 000000* * * * * * * * * * * * * * * *
* * * * * 000000* * * * * * * * * * * * * * ** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample
**** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample ****
Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander
David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample
**** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample ****
Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander
David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample
**** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample ****
Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander
David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David
Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Sample **** Mr. Sample **000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares***
*000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****
000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****0
00000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00
0000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000
000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****0000
00**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00000
0**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000
**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000*
*Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**
Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**S
***ZERO HUNDRED THOUSAND ZERO HUNDRED AND ZERO*** MR. SAMPLE & MRS. SAMPLE & MR. SAMPLE & MRS. SAMPLE ZQ00000000 Certificate
Numbers 1234567890/1234567890 1234567890/1234567890 1234567890/1234567890 1234567890/1234567890 1234567890/1234567890 1234567890/1234567890
Total Transaction Num/No. 123456 Denom. 123456 Total 1234567 MR A SAMPLE DESIGNATION (IF ANY) ADD 1 ADD 2
ADD 3 ADD 4 PO BOX 505006, Louisville, KY 40233-5006 CUSIP/IDENTIFIER XXXXXX XX X Holder ID XXXXXXXXXX Insurance Value
1,000,000.00 Number of Shares 123456 DTC 12345678 123456789012345 THIS CERTIFICATE IS TRANSFERABLE IN CITIES DESIGNATED
BY THE TRANSFER AGENT, AVAILABLE ONLINE AT www.computershare.com Exhibit 4.1 DATED COUNTERSIGNED AND REGISTERED: COMPUTERSHARE
TRUST COMPANY, N.A. TRANSFER AGENT AND REGISTRAR,

 

    

     

    

 

 

For value
received, ____________________________hereby sell, assign and transfer unto ________________________________________________________________________________________________________________________________
________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________________
_______________________________________________________________________________________________________________________ Shares _______________________________________________________________________________________________________________________
Attorney Dated: __________________________________________20__________________ Signature: ____________________________________________________________
Signature: ____________________________________________________________ Notice: The signature to this assignment must correspond with
the name as written upon the face of the certificate, in every particular, without alteration or enlargement, or any change whatever.
PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF ASSIGNEE (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING POSTAL ZIP
CODE, OF ASSIGNEE) of the Class A Common Stock represented by the within Certificate, and do hereby irrevocably constitute and appoint
to transfer the said stock on the books of the within-named Company with full power of substitution in the premises. . RAPID MICRO BIOSYSTEMS,
INC. THE COMPANY WILL FURNISH WITHOUT CHARGE TO EACH SHAREHOLDER WHO SO REQUESTS, A SUMMARY OF THE POWERS, DESIGNATIONS, PREFERENCES
AND RELATIVE, PARTICIPATING, OPTIONAL OR OTHER SPECIAL RIGHTS OF EACH CLASS OF STOCK OF THE COMPANY AND THE QUALIFICATIONS, LIMITATIONS
OR RESTRICTIONS OF SUCH PREFERENCES AND RIGHTS, AND THE VARIATIONS IN RIGHTS, PREFERENCES AND LIMITATIONS DETERMINED FOR EACH SERIES,
WHICH ARE FIXED BY THE ARTICLES OF INCORPORATION OF THE COMPANY, AS AMENDED, AND THE RESOLUTIONS OF THE BOARD OF DIRECTORS OF THE COMPANY,
AND THE AUTHORITY OF THE BOARD OF DIRECTORS TO DETERMINE VARIATIONS FOR FUTURE SERIES. SUCH REQUEST MAY BE MADE TO THE OFFICE OF THE
SECRETARY OF THE COMPANY OR TO THE TRANSFER AGENT. THE BOARD OF DIRECTORS MAY REQUIRE THE OWNER OF A LOST OR DESTROYED STOCK CERTIFICATE,
OR HIS LEGAL REPRESENTATIVES, TO GIVE THE COMPANY A BOND TO INDEMNIFY IT AND ITS TRANSFER AGENTS AND REGISTRARS AGAINST ANY CLAIM THAT
MAY BE MADE AGAINST THEM ON ACCOUNT OF THE ALLEGED LOSS OR DESTRUCTION OF ANY SUCH CERTIFICATE. Signature(s) Guaranteed: Medallion Guarantee
Stamp THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE GUARANTOR INSTITUTION (Banks, Stockbrokers, Savings and Loan Associations
and Credit Unions) WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15. The following
abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations: TEN COM - as tenants in common UNIF GIFT MIN ACT - ............................................Custodian
................................................. (Cust) (Minor) TEN ENT - as tenants by the entireties under Uniform Gifts to Minors
Act ........................................................ (State) JT TEN - as joint tenants with right of survivorship UNIF TRF MIN
ACT - ............................................Custodian (until age ................................) and not as tenants in common
(Cust) .............................under Uniform Transfers to Minors Act ................... (Minor) (State) Additional abbreviations
may also be used though not in the above list.Exhibit 4.2

 

	Schedule of Holders of Warrants 

to Purchase Common Stock 
	Holder Name
	
     

    KPCB Holdings, Inc.

	Longitude Venture Partners II, L.P.
	Quaker BioVentures II, L.P.
	TPG RAMB Holdings, L.P.

 

 

THIS WARRANT AND THE SECURITIES ISSUABLE UPON
THE EXERCISE HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. THEY MAY NOT BE SOLD, OFFERED FOR SALE,
PLEDGED, HYPOTHECATED, OR OTHERWISE TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933,
AS AMENDED, OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT REGISTRATION IS NOT REQUIRED UNDER SUCH ACT OR UNLESS SOLD PURSUANT
TO RULE 144 UNDER SUCH ACT.

 

	Date of Issuance: March 22, 2015	Void after March 9, 2022,
		unless earlier terminated
		pursuant to the terms hereof

 

RAPID MICRO BIOSYSTEMS, INC.

WARRANT TO PURCHASE SHARES OF PREFERRED STOCK

 

For the Purchase Price of
Warrant stipulated in that certain Note and Warrant Purchase Agreement, dated as of March 9, 2015, among the Company, Lender and
certain other investors, as the same may be amended, restated or otherwise modified from time to time (the “Purchase Agreement”)
the receipt and sufficiency of which is hereby acknowledged, this Warrant is issued to ________________ or its assigns (the “Holder”)
by Rapid Micro Biosystems, Inc., a Delaware corporation (the “Company”). Capitalized terms not defined herein
shall have the meaning set forth in the Purchase Agreement.

 

		1.	Purchase of Shares.

 

(a)            Number
of Conversion Shares. Subject to the terms and conditions set forth herein and set forth in the Purchase Agreement, and provided that
the Holder has invested at least its Pro Rata Portion of both (i) the Aggregate Note Financing Amount in principal of Notes to be
issued pursuant to the Purchase Agreement, and (ii) the Aggregate Next Equity Financing Amount for the purchase of shares
of Equity Securities in the Next Equity Financing, the Holder is entitled, upon surrender of this Warrant at the principal office of the
Company (or at such other place as the Company shall notify the Holder in writing), to purchase from the Company up to the number of fully
paid and nonassessable Conversion Shares as described in Section 3 of the Purchase Agreement (as adjusted pursuant to Section 6
hereof).

 

    1

     

    

 

(b)            Exercise
Price. The purchase price for the Conversion Shares issuable pursuant to this Section 1 shall be the exercise price described
in Section 3 of the Purchase Agreement. The Conversion Shares and the purchase price of such Conversion Shares shall be subject to
adjustment pursuant to Section 6 hereof. Such purchase price, as adjusted from time to time, is herein referred to as the “Exercise
Price.”

 

2.             Exercise
Period; Termination. Provided that the Holder has satisfied the conditions specified in Sections 1(a)(i) and 1(a)(ii) hereof,
and unless earlier terminated pursuant to the terms hereof, this Warrant shall be exercisable, in whole or in part, during the period
commencing on the closing date of the Company’s Next Equity Financing and ending at 5:00 p.m. pacific time on March 9,
2022 (the “Exercise Period”). Notwithstanding the foregoing, this Warrant shall terminate in full and be of no further force
or effect at the earliest to occur of (i) 5:00 p.m. pacific time on the Second Anniversary Date if the Next Equity Financing
has not been consummated by such time, (ii) upon the closing of the Next Equity Financing if consummated on or before the Second
Anniversary Date, and each Lender, including the Holder, has invested at least its Pro Rata Portion of both (A) the Aggregate Note
Financing Amount in principal of Notes to be issued pursuant to the Purchase Agreement, and (B) the Aggregate Next Equity Financing
Amount for the purchase of shares of Equity Securities in the Next Equity Financing, (iii) upon the closing of the Next Equity Financing
if consummated on or before the Second Anniversary Date, and the Holder has not invested at least its Pro Rata Portion of the Aggregate
Next Equity Financing Amount for the purchase of shares of Equity Securities in the Next Equity Financing, or (iv) upon the consummation
of Corporate Transaction. In the event that this Warrant has not been otherwise terminated pursuant to this Section 2, upon the expiration
of the Exercise Period or immediately prior to the consummation of a Corporate Transaction (whichever is earlier), the fair market value
of one Conversion Share (or other security issuable upon the exercise hereof) as determined in accordance with Section 4 below is
greater than the Exercise Price in effect on such date, then this Warrant, to the extent then exercisable, shall automatically be deemed
on and as of such date to be exercised pursuant to Section 4 below as to all Conversion Shares (or such other securities) for which
it shall not have been previously exercised, and the Company shall, within a reasonable time, deliver a certificate representing the Conversion
Shares (or such other securities) issued upon such exercise to Holder.

 

		3.	Method of Exercise.

 

(a)            While
this Warrant remains outstanding and exercisable in accordance with Section 2 above, the Holder may exercise, in whole or in part,
the purchase rights evidenced hereby. Such exercise shall be effected by:

 

(i)            the
surrender of the Warrant, together with a duly executed copy of the Notice of Exercise attached hereto, to the Secretary of the Company
at its principal office (or at such other place as the Company shall notify the Holder in writing); and

 

(ii)          the
payment to the Company of an amount equal to the aggregate Exercise Price for the number of Conversion Shares being purchased.

 

    2

     

    

 

(b)            Each
exercise of this Warrant shall be deemed to have been effected immediately prior to the close of business on the day on which this Warrant
is surrendered to the Company as provided in Section 3(a) above. At such time, the person or persons in whose name or names
any certificate for the Conversion Shares shall be issuable upon such exercise as provided in Section 3(c) below shall be deemed
to have become the holder or holders of record of the Conversion Shares represented by such certificate.

 

(c)            As
soon as practicable after the exercise of this Warrant in whole or in part, and in any event within twenty (20) days thereafter, the Company
at its expense will cause to be issued in the name of, and delivered to, the Holder, or as such Holder (upon payment by such Holder of
any applicable transfer taxes) may direct:

 

(i)            a
certificate or certificates for the number of Conversion Shares to which such Holder shall be entitled, and

 

(ii)          in
case such exercise is in part only, a new warrant or warrants (dated the date hereof) of like tenor, calling in the aggregate on the face
or faces thereof for the number of Conversion Shares equal to the number of such Conversion Shares called for on the face of this Warrant
minus the number of Conversion Shares purchased by the Holder upon all exercises made in accordance with Section 3(a) above
or Section 4 below.

 

4.            Net
Exercise. In lieu of exercising this Warrant for cash, the Holder may elect to receive shares equal to the value of this Warrant (or
the portion thereof being exercised) by surrender of this Warrant at the principal office of the Company together with notice of such
election (a “Net Exercise”). A Holder who Net Exercises shall have the rights described in Sections 3(b) and 3(c) hereof,
and the Company shall issue to such Holder a number of Conversion Shares computed using the following formula:

 

 

Where

 

X = The number of Conversion Shares
to be issued to the Holder.

 

Y = The number of
Conversion Shares purchasable under this Warrant or, if only a portion of the Warrant is being exercised, the portion of the Warrant being
cancelled (at the date of such calculation).

 

A = The fair market
value of one (1) Conversion Share (at the date of such calculation).

B = The Exercise Price (as adjusted
to the date of such calculations).

 

For purposes of this Section 4,
the fair market value of a Conversion Share shall mean the average of the closing price of the Conversion Shares (or equivalent shares
of Common Stock underlying the Conversion Shares) quoted in the over-the-counter market in which the Conversion Shares (or equivalent
shares of Common Stock underlying the Conversion Shares) are traded or the closing price quoted on any exchange or electronic securities
market on which the Conversion Shares (or equivalent shares of Common Stock underlying the Warrants) are listed, whichever is applicable,
as published in The Wall Street Journal for the five (5) trading days prior to the date of determination of fair market value
(or such shorter period of time during which such Conversion Shares were traded over-the-counter or on such exchange). In the event that
this Warrant is exercised pursuant to this Section 4 in connection with the Company’s Initial Public Offering, the fair market
value per Conversion Share shall be the product of (a) the per share offering price to the public of the Company’s Initial
Public Offering, and (b) the number of shares of Common Stock into which each Conversion Share is convertible at the time of such
exercise or, if the Conversion Shares are shares of Common Stock, one. In the event that this Warrant is exercised pursuant to this Section 4
in connection with a Corporate Transaction (whether automatically in accordance with Section 2 above or upon notice by the Holder),
the fair market value per Conversion Share shall be the per share price paid to a holder of Equity Securities issued in the Next Equity
Financing. In the event that this Warrant is exercised not in connection with the Initial Public Offering or Corporate Transaction and
the Conversion Shares are not traded on the over-the-counter market, an exchange or an electronic securities market, the fair market value
shall be the price per Conversion Share that the Company could obtain from a willing buyer for Conversion Shares sold by the Company from
authorized but unissued Conversion Shares, as such prices shall be determined in reasonable good faith by the Company’s Board of
Directors.

 

    3

     

    

 

		5.	Covenants of the Company.

 

(a)            Notices
of Record Date. In the event of any taking by the Company of a record of the holders of any class of securities for the purpose of
determining the holders thereof who are entitled to receive any dividend (other than a cash dividend which is the same as cash dividends
paid in previous quarters or a stock dividend) or other distribution, the Company shall mail to the Holder, at least ten (10) days
prior to such record date, a notice specifying the date on which any such record is to be taken for the purpose of such dividend or distribution.

 

(b)            Covenants
as to Exercise Shares. The Company covenants and agrees that all Conversion Shares that may be issued upon the exercise of the rights
represented by this Warrant will, upon issuance in accordance with the terms hereof, be validly issued and outstanding, fully paid and
nonassessable, and free from all taxes, liens and charges with respect to the issuance thereof. The Company further covenants and agrees
that the Company will at all times during the Exercise Period have authorized and reserved, free from preemptive rights, a sufficient
number of shares of its Preferred Stock to provide for the exercise of the rights represented by this Warrant. If at any time during the
Exercise Period the number of authorized but unissued shares of Preferred Stock shall not be sufficient to permit exercise of this Warrant,
the Company will take such corporate action as may, in the opinion of its counsel, be necessary to increase its authorized but unissued
shares of Preferred Stock to such number of shares as shall be sufficient for such purposes.

 

6.            Adjustment
of Exercise Price and Number of Conversion Shares. The number and kind of Conversion Shares purchasable upon exercise of this Warrant
and the Exercise Price shall be subject to adjustment from time to time as follows:

 

(a)            Subdivisions,
Combinations and Other Issuances. If the Company shall at any time after the issuance but prior to the expiration of this Warrant
subdivide its Preferred Stock, by split-up or otherwise, or combine its Preferred Stock, or issue additional shares of its Preferred Stock
or Common Stock as a dividend with respect to any shares of its Preferred Stock, the number of Conversion Shares issuable on the exercise
of this Warrant shall forthwith be proportionately increased in the case of a subdivision or stock dividend, or proportionately decreased
in the case of a combination. Appropriate adjustments shall also be made to the Exercise Price payable per share, but the aggregate Exercise
Price payable for the total number of Conversion Shares purchasable under this Warrant (as adjusted) shall remain the same. Any
adjustment under this Section 6(a) shall become effective at the close of business on the date the subdivision or combination
becomes effective, or as of the record date of such dividend, or in the event that no record date is fixed, upon the making of such dividend.

 

    4

     

    

 

(b)            Reclassification,
Reorganization and Consolidation. In case of any reclassification, capital reorganization or change in the capital stock of the Company
(other than as a result of a subdivision, combination or stock dividend provided for in Section 6(a) above), then, as a condition
of such reclassification, reorganization or change, lawful provision shall be made, and duly executed documents evidencing the same from
the Company or its successor shall be delivered to the Holder, so that the Holder shall have the right at any time prior to the expiration
of this Warrant to purchase, at a total price equal to that payable upon the exercise of this Warrant, the kind and amount of shares of
stock and other securities or property receivable in connection with such reclassification, reorganization or change by a holder of the
same number and type of securities as were purchasable as Conversion Shares by the Holder immediately prior to such reclassification,
reorganization or change. In any such case appropriate provisions shall be made with respect to the rights and interest of the Holder
so that the provisions hereof shall thereafter be applicable with respect to any shares of stock or other securities or property deliverable
upon exercise hereof, and appropriate adjustments shall be made to the Exercise Price per Conversion Share payable hereunder, provided
the aggregate Exercise Price shall remain the same.

 

(c)            Adjustments
for Diluting Issuances. Without duplication of any adjustment otherwise provided for in this Section 6, the number of shares
of common stock issuable upon conversion of the Conversion Shares shall be subject to anti-dilution adjustment from time to time in the
manner set forth in the Company’s Certificate of Incorporation as if the Conversion Shares were issued and outstanding on and as
of the date of any such required adjustment.

 

(d)            Notice
of Adjustment. When any adjustment is required to be made in the number or kind of shares purchasable upon exercise of the Warrant,
or in the Exercise Price, the Company shall promptly notify the Holder of such event and of the number of Conversion Shares or other securities
or property thereafter purchasable upon exercise of this Warrant.

 

(e)            Conversion
of Preferred Stock. In the event that all outstanding shares of Preferred Stock are converted to Common Stock, or any other security,
in accordance with the terms of the Restated Certificate in connection with the Initial Public Offering, a Corporate Transaction or other
event, this Warrant shall become exercisable for Common Stock or such other security.

 

7.            No
Fractional Shares or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise of this
Warrant, but in lieu of such fractional shares the Company shall make a cash payment therefor on the basis of the Exercise Price then
in effect.

 

8.            No
Stockholder Rights. Other than in respect of the adjustments provided in Section 6 hereof, prior to exercise of this Warrant,
the Holder shall not be entitled to any rights of a stockholder with respect to the Conversion Shares, including (without limitation)
the right to vote such Conversion Shares, receive dividends or other distributions thereon, exercise preemptive rights or be notified
of stockholder meetings, and except as otherwise provided in this Warrant or the Purchase Agreement, such Holder shall not be entitled
to any stockholder notice or other communication concerning the business or affairs of the Company.

 

    5

     

    

 

		9.	Notice of Certain Events. If the Company proposes at any time to:

 

(a)           declare
any dividend or distribution upon the outstanding shares of the Company’s capital stock, whether in cash, property, stock, or other
securities and whether or not a regular cash dividend;

 

(b)          effect
any reclassification, exchange, combination, substitution, reorganization or recapitalization of the outstanding shares of the Company’s
capital stock;

 

		(c)	effect a Corporate Transaction or to liquidate, dissolve or wind up; or

 

		(d)	effect an Initial Public Offering;

 

then, in connection with each such event, the
Company shall give Holder:

 

(i)          at
least seven (7) Business Days prior written notice of the date on which a record will be taken for such dividend, distribution, or
subscription rights (and specifying the date on which the holders of outstanding shares of the Company’s capital stock will be entitled
thereto) or for determining rights to vote, if any, in respect of the matters referred to in (a) above;

 

(ii)           in
the case of the matters referred to in (b) and (c) above at least seven (7) business days prior written notice of the date
when the same will take place (and specifying the date on which the holders of outstanding shares of the Company’s capital stock
will be entitled to exchange their shares for the securities or other property deliverable upon the occurrence of such event and such
reasonable information as Holder may reasonably require regarding the treatment of this Warrant in connection with such event giving rise
to the notice); and

 

(iii)         with
respect to the Initial Public Offering, at least seven (7) business days prior written notice of the date on which the Company
proposes to file its registration statement in connection therewith.

 

Company will also provide
information requested by Holder that is reasonably necessary to enable Holder to comply with Holder’s accounting or reporting requirements.

 

10.            Transfer
of Warrant. Subject to compliance with applicable federal and state securities laws and any other contractual restrictions between
the Company and the Holder contained in the Purchase Agreement, this Warrant and all rights hereunder are transferable in whole or in
part by the Holder to any person or entity upon written notice to the Company. Within a reasonable time after the Company’s receipt
of an executed Assignment Form in the form attached hereto, the transfer shall be recorded on the books of the Company upon the surrender
of this Warrant, properly endorsed, to the Company at its principal offices, and the payment to the Company of all transfer taxes
and other governmental charges imposed on such transfer. In the event of a partial transfer, the Company shall issue to the new holders
one or more appropriate new warrants.

 

    6

     

    

 

11.          Governing
Law. This Warrant and any controversy arising out of or relating to this Warrant shall be governed by, and construed in accordance
with, the General Corporation Law of the State of Delaware as to matters within the scope thereof, and as to all other matters (including
contract law, tort law and matters of fraud) shall be governed by, and construed in accordance with, the internal laws of the State of
California, without regard to conflict of law principles that would result in the application of any law other than the law of the State
of California.

 

12.            Successors
and Assigns. The terms and provisions of this Warrant and the Purchase Agreement shall inure to the benefit of, and be binding upon,
the Company and the holders hereof and their respective successors and assigns.

 

13.            Titles
and Subtitles. The titles and subtitles used in this Warrant are used for convenience only and are not to be considered in construing
or interpreting this Warrant.

 

14.           Notices.
All notices and other communications given or made pursuant hereto shall be in writing and shall be deemed effectively given:
(a) upon personal delivery to the party to be notified, (b) when sent by confirmed electronic mail or facsimile if sent
during normal business hours of the recipient, and if not so confirmed, then on the next business day, (c) five
(5) days after having been sent by registered or certified mail, return receipt requested, postage prepaid, or (d) one
(1) day after deposit with a nationally recognized overnight courier, specifying next day delivery, with written verification
of receipt. All communications shall be sent to the respective parties at the following addresses (or at such other addresses as
shall be specified by notice given in accordance with this Section 14):

 

If to the Company:

 

RAPID MICRO BIOSYSTEMS, INC.

 

1001 Pawtucket Blvd.

 

Lowell, MA 01854

 

Attention: Chief Executive Officer

 

If to Holders:

 

At the addresses shown on the signature pages hereto.

 

15.            Amendments
and Waivers; Resolutions of Dispute; Notice. The amendment or waiver of any term of this Warrant, the resolution of any controversy
or claim arising out of or relating to this Warrant and the provision of notice shall be conducted pursuant to the terms of the Purchase
Agreement.

 

16.            Severability.
If any provision of this Warrant is held to be unenforceable under applicable law, such provision shall be excluded from this Warrant
and the balance of the Warrant shall be interpreted as if such provision were so excluded and shall be enforceable in accordance
with its terms.

 

[Signature Page Follows]

 

    7

     

    

 

IN WITNESS
WHEREOF, the parties
have executed this Warrant
as of the date first written above.

 

	 	RAPID MICRO BIOSYSTEMS, INC.
	 	 
	 	By:	 
	 	 	President and Chief Executive Officer

 

[Signature Page to Warrant]

 

    8

     

    

 

NOTICE OF EXERCISE

 

RAPID MICRO BIOSYSTEMS, INC.

 

Attention: Corporate Secretary

 

The undersigned hereby elects to purchase, pursuant
to the provisions of the Warrant, as follows:

 

		 ̈	____________Conversion Shares pursuant to the terms of the attached Warrant,
and tenders herewith payment in cash of the Exercise Price of such Conversion Shares in full, together with all applicable transfer taxes,
if any.

 

		 ̈	Net Exercise the attached Warrant
with respect to                      Conversion Shares.

 

The undersigned hereby represents and warrants
that Representations and Warranties in Section 6 of the Purchase Agreement are true and correct as of the date hereof.

 

	 	 	HOLDER:
	 	 	 
	Date:	 	 	By:	 

 

	 	Address:	 
	 	 	 

 

	Name in which shares should be registered:	 
	 	 

 

     

     

    

 

ASSIGNMENT FORM

 

(To assign the foregoing Warrant, execute
this form and supply required information. Do not use this form to purchase shares.)

 

FOR
VALUE RECEIVED, the foregoing Warrant and all rights evidenced thereby are hereby assigned to

 

	Name:	
	 	(Please Print)

 

	Address:	
	 	(Please Print)
	Dated:	 	 

 

	Holder’s	 
	Signature:	 	 
	 	 
	Holder’s	 
	Address:	 	 

 

NOTE:
The signature to this Assignment Form must correspond with the name as it appears on the face of the Warrant. Officers of corporations
and those acting in a fiduciary or other representative capacity should provide proper evidence of authority to assign the foregoing Warrant.

 

    3

     

    

 

	Schedule of Holders of Warrants 

to Purchase Common Stock

 

	Name	 	Date of Issuance	 	 	Conversion Shares

 Numerator	 
	Andrew Khouri	 	March 4, 2016	 	 	$	450.00	 
	Biomedical Sciences Investment Fund Pte Ltd	 	March 4, 2016	 	 	$	109,173.20	 
	Fletcher Spaght Ventures II, L.P.	 	March 4, 2016	 	 	$	316.87	 
	Foster & Foster Capital V LLC	 	March 4, 2016	 	 	$	32,751.96	 
	Foundation Investments of Ohio Ltd.	 	March 4, 2016	 	 	$	21,834.62	 
	FSV II, L.P.	 	March 4, 2016	 	 	$	31.88	 
	FSV II-B, L.P.	 	March 4, 2016	 	 	$	150.89	 
	Hepalink USA Inc.	 	March 4, 2016	 	 	$	109,173.20	 
	KPCB Holdings, Inc.	 	March 4, 2016	 	 	$	163,822.95	 
	Longitude Venture Partners II, L.P.	 	March 4, 2016	 	 	$	284,614.07	 
	Manbro P.E. IV, LP	 	March 4, 2016	 	 	$	54,586.58	 
	Mellon Family Investment Company V	 	March 4, 2016	 	 	$	32,751.96	 
	MSF Private Equity Fund LLC	 	March 4, 2016	 	 	$	32,751.96	 
	Philip Stewart	 	March 4, 2016	 	 	$	2,183.44	 
	Quaker Bioventures II, L.P.	 	March 4, 2016	 	 	$	258,758.44	 
	Richard King Mellon Foundation	 	March 4, 2016	 	 	$	32,751.96	 
	Robert Spignesi	 	March 4, 2016	 	 	$	1,310.07	 
	Steve Furlong	 	March 4, 2016	 	 	$	760.85	 
	TPG RAMB Holdings, L.P.	 	March 4, 2016	 	 	$	213,460.56	 
	TVM Life Science Ventures VI GmbH & Co. K.G.	 	May 13, 2016	 	 	$	110,492.69	 
	TVM Life Science Ventures VI, L.P.	 	May 13, 2016	 	 	$	37,871.77	 

 

     

     

    

 

THIS WARRANT AND THE SECURITIES ISSUABLE
UPON THE EXERCISE HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. THEY MAY NOT BE SOLD, OFFERED FOR
SALE, PLEDGED, HYPOTHECATED, OR OTHERWISE TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT
OF 1933, AS AMENDED, OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT REGISTRATION IS NOT REQUIRED UNDER SUCH ACT OR UNLESS SOLD
PURSUANT TO RULE 144 UNDER SUCH ACT.

 

	Date of Issuance: _______ __, 2016	Void after March 4, 2026 unless
earlier terminated pursuant to the terms hereof.

 

RAPID MICRO BIOSYSTEMS, INC.

WARRANT TO PURCHASE SHARES OF PREFERRED

 STOCK

 

This Warrant is issued to
__________________________ or [his][her][its] assigns (the “Holder”) by Rapid Micro Biosystems, Inc., a Delaware
corporation (the “Company”). Unless otherwise defined herein, capitalized terms shall have the following meanings:

 

“Conversion Shares”
shall mean (a) shares of such series of Preferred Stock as are issued in the Next Equity Financing if the Next Equity Financing is
consummated on or prior to February 28, 2017; or (b) shares of Series C Preferred Stock if the Next Equity Financing has
not been consummated on or prior to February 28, 2017.

 

“Corporate Transaction”
shall mean (A) the closing of the sale, transfer or other disposition of all or substantially all of the Company’s assets,
(B) the consummation of the merger or consolidation of the Company with or into another entity (except a merger or consolidation
in which the holders of capital stock of the Company immediately prior to such merger or consolidation continue to hold at least 50% of
the voting power of the capital stock of the Company or the surviving or acquiring entity), or (C) the closing of the transfer (whether
by merger, consolidation or otherwise), in one transaction or a series of related transactions, to a person or group of affiliated persons
(other than an underwriter of this corporation’s securities), of the Company’s securities if, after such closing, such person
or group of affiliated persons would hold 50% or more of the outstanding voting stock of this corporation (or the surviving or acquiring
entity); provided, however, that a transaction shall not constitute a Corporate Transaction if its sole purpose is to change
the state of the Company’s incorporation or to create a holding company that will be owned in substantially the same proportions
by the persons who held the Company’s securities immediately prior to such transaction. Notwithstanding the prior sentence, the
sale of shares of Preferred Stock in a bona fide financing transaction shall not be deemed a Corporate Transaction.

 

“Exercise Price”
shall mean: (a) the Next Round Price if this Warrant is exercisable for shares of Preferred Stock issued in the Next Equity Financing;
or (b) $1.19583365 if this Warrant is exercisable for shares of Series C Preferred Stock.

 

     

     

    

 

“Next Equity Financing”
shall mean the next sale (or series of related sales) by the Company of its Preferred Stock following [Original Date of Issuance] [March 4,
2016] from which the Company receives aggregate gross proceeds of not less than $10,000,000 (excluding the aggregate amount of any indebtedness
of the Company converted into Preferred Stock in the Next Equity Financing).

 

“Next Round Price”
shall mean the price per share of Preferred Stock paid by the investors in the Next Equity Financing (excluding, if applicable, any discounts
applied to the purchase price of any Preferred Stock issued in the Next Equity Financing upon conversion or cancellation of indebtedness).

 

“Original Date of Issuance” shall mean __________
__, 2016.

 

“Preferred Stock” shall mean the Company’s
preferred stock, $0.01 par value

 

per share.

 

“Series C Preferred Stock” shall mean
the Company’s Series C Preferred Stock,

 

$0.01 par value per share.

 

1.            Purchase
of Shares; Number of Conversion Shares and Exercise Price. Subject to the terms and conditions set forth herein, the Holder is entitled,
upon surrender of this Warrant at the principal office of the Company (or at such other place as the Company shall notify the Holder in
writing), to purchase from the Company up to a number of fully paid and nonassessable Conversion Shares equal to $_______ divided by the
Exercise Price. The Conversion Shares and the Exercise Price of the Conversion Shares shall be subject to adjustment pursuant to Section 7
hereof.

 

2.            Exercise
Period; Termination. Unless earlier terminated pursuant to the terms hereof, this Warrant shall be exercisable, in whole or in part,
during the period commencing on the Original Date of Issuance and ending at 5:00 p.m. pacific time on March 4, 2026 (the “Exercise
Period”). In the event that this Warrant has not been otherwise terminated pursuant to this Section 2, upon the expiration
of the Exercise Period, if the fair market value of one Conversion Share (or other security issuable upon the exercise hereof) as determined
in accordance with Section 4 below is greater than the Exercise Price in effect on such date, then this Warrant, to the extent then
exercisable, shall automatically be deemed on and as of such date to be exercised pursuant to Section 4 below as to all Conversion
Shares (or such other securities) for which it shall not have been previously exercised, and the Company shall, within a reasonable time,
deliver a certificate representing the Conversion Shares (or such other securities) issued upon such exercise to Holder.

 

		3.	Method of Exercise.

 

(a)            While
this Warrant remains outstanding and exercisable in accordance with Section 2 above, the Holder may exercise, in whole or in part,
the purchase rights evidenced hereby. Such exercise shall be effected by:

 

(i)            the
surrender of the Warrant, together with a duly executed copy of the Notice of Exercise attached hereto, to the Secretary of the Company
at its principal office (or at such other place as the Company shall notify the Holder in writing); and

 

    2 

     

    

 

(ii)          the
payment to the Company of an amount equal to the aggregate Exercise Price for the number of Conversion Shares being purchased.

 

(b)            Each
exercise of this Warrant shall be deemed to have been effected immediately prior to the close of business on the day on which this Warrant
is surrendered to the Company as provided in Section 3(a) above. At such time, the person or persons in whose name or names
any certificate for the Conversion Shares shall be issuable upon such exercise as provided in Section 3(c) below shall be deemed
to have become the holder or holders of record of the Conversion Shares represented by such certificate.

 

(c)            As
soon as practicable after the exercise of this Warrant in whole or in part, and in any event within twenty (20) days thereafter, the Company
at its expense will cause to be issued in the name of, and delivered to, the Holder, or as such Holder (upon payment by such Holder of
any applicable transfer taxes) may direct:

 

(i)            a
certificate or certificates for the number of Conversion Shares to which such Holder shall be entitled, and

 

(ii)           in
case such exercise is in part only, a new warrant or warrants (dated the date hereof) of like tenor, calling in the aggregate on the face
or faces thereof for the number of Conversion Shares equal to the number of such Conversion Shares called for on the face of this Warrant
minus the number of Conversion Shares purchased by the Holder upon all exercises made in accordance with Section 3(a) above
or Section 4 below.

 

4.            Net
Exercise. In lieu of exercising this Warrant for cash, the Holder may elect to receive shares equal to the value of this Warrant (or
the portion thereof being exercised) by surrender of this Warrant at the principal office of the Company together with notice of such
election (a “Net Exercise”). A Holder who Net Exercises shall have the rights described in Sections 3(b) and 3(c) hereof,
and the Company shall issue to such Holder a number of Conversion Shares computed using the following formula:

 

 

Where

 

X
=  The number of Conversion Shares to be issued to the Holder.

Y = The number of
Conversion Shares purchasable under this Warrant or, if only a portion of the Warrant is being exercised, the portion of the Warrant being
cancelled (at the date of such calculation).

 

    3 

     

    

 

A = The fair market
value of one (1) Conversion Share (at the date of such calculation).

B = The Exercise Price (as
adjusted to the date of such calculations).

 

For purposes of this Section 4,
the fair market value of a Conversion Share shall mean the average of the closing price of the Conversion Shares (or equivalent shares
of Common Stock underlying the Conversion Shares) quoted in the over-the-counter market in which the Conversion Shares (or equivalent
shares of Common Stock underlying the Conversion Shares) are traded or the closing price quoted on any exchange or electronic securities
market on which the Conversion Shares (or equivalent shares of Common Stock underlying the Warrants) are listed, whichever is applicable,
as published in The Wall Street Journal for the five (5) trading days prior to the date of determination of fair market value
(or such shorter period of time during which such Conversion Shares were traded over-the-counter or on such exchange). In the event that
this Warrant is exercised pursuant to this Section 4 in connection with the Company’s first underwritten public offering pursuant
to an effective registration statement under the Securities Act of 1933, as amended (the “IPO”), the fair market value
per Conversion Share shall be the product of (a) the per share offering price to the public of the IPO, and (b) the number of
shares of Common Stock into which each Conversion Share is convertible at the time of such exercise or, if the Conversion Shares are shares
of Common Stock, one. In the event that this Warrant is exercised not in connection with the IPO and the Conversion Shares are not traded
on the over- the-counter market, an exchange or an electronic securities market, the fair market value shall be the price per Conversion
Share that the Company could obtain from a willing buyer for Conversion Shares sold by the Company from authorized but unissued Conversion
Shares, as such prices shall be determined in reasonable good faith by the Company’s Board of Directors.

 

		5.	Representations and Warranties of the Company and the Holder.

 

		(a)	The Company hereby represents and warrants to the Holder as follows:

 

(i)            The
Company is a corporation duly organized, validly existing, and in good standing under the laws of the State of Delaware and has all requisite
corporate power and authority to carry on its business as now conducted. The Company is duly qualified to transact business and is in
good standing in each jurisdiction in which the failure to so qualify would have a material adverse effect on its business or properties.

 

(ii)           Except
for the authorization and issuance of the Conversion Shares issuable in connection with the Next Equity Financing, all corporate action
has been taken on the part of the Company, its officers, directors and stockholders necessary for the authorization, execution and delivery
of this Warrant. Except as may be limited by applicable bankruptcy, insolvency, reorganization, or similar laws relating to or affecting
the enforcement of creditors’ rights, the Company has taken all corporate action required to make all of the obligations of the
Company reflected in the provisions of this Warrant, the valid and enforceable obligations they purport to be.

 

    4 

     

    

 

(iii)            The
issuance and delivery of this Warrant will not constitute or result in a material default or violation of any law or regulation applicable
to the Company or any material term or provision of the Company’s Fourth Amended and Restated Certificate of Incorporation filed
with the Secretary of State of the State of Delaware on April 21, 2015 (the “Restated Certificate”) or the Company’s
current bylaws or any material agreement or instrument by which it is bound or to which its properties or assets are subject.

 

		(b)	The Holder hereby represents and warrants to the Company as follows:

 

(i)            This
Warrant, the Conversion Shares issuable upon exercise of this Warrant and any other securities issuable upon conversion of the Conversion
Shares (collectively, the “Securities”), are being acquired for investment for Holder’s own account, not as a
nominee or agent, and not with a view to the resale or distribution of any part thereof. Holder has no present intention of selling, granting
any participation in, or otherwise distributing the same. Holder does not have any contract, undertaking, agreement or arrangement with
any person to sell, transfer or grant participations to such person or to any third person, with respect to the Securities.

 

(ii)             Holder
acknowledges that it has received all the information it considers necessary or appropriate for deciding whether to acquire the Securities.
Holder further represents that it has had an opportunity to ask questions and receive answers from the Company regarding the terms and
conditions of the offering of the Securities.

 

(iii)            Holder
is an investor in securities of companies in the development stage and acknowledges that it is able to fend for itself, can bear the economic
risk of its investment and has such knowledge and experience in financial or business matters that it is capable of evaluating the merits
and risks of the investment in the Securities. If other than an individual, Holder also represents it has not been organized solely for
the purpose of acquiring the Securities.

 

(iv)            Holder
is an “accredited investor” within the meaning of Rule 501 of Regulation D of the Securities and Exchange Commission
(the “SEC”), as presently in effect.

 

(v)           Holder
understands that the Securities are characterized as “restricted securities” under the federal securities laws inasmuch as
they are being acquired from the Company in a transaction not involving a public offering and that under such laws and applicable regulations
such securities may be resold without registration under the Securities Act of 1933, as amended, only in certain limited circumstances.
Holder represents that it is familiar with SEC Rule 144, as presently in effect, and understands the resale limitations imposed thereby
and by the Securities Act of 1933, as amended.

 

		(vi)	Holder understands that the Securities may bear the following

 

    5 

     

    

 

legend:

 

“THESE SECURITIES HAVE NOT BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. THEY MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED, HYPOTHECATED, OR
OTHERWISE TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR AN
OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT REGISTRATION IS NOT REQUIRED UNDER SUCH ACT OR UNLESS SOLD PURSUANT TO RULE 144
UNDER SUCH ACT.”

 

		6.	Covenants of the Company.

 

(a)            Notices
of Record Date. In the event of any taking by the Company of a record of the holders of any class of securities for the purpose of
determining the holders thereof who are entitled to receive any dividend (other than a cash dividend which is the same as cash dividends
paid in previous quarters or a stock dividend) or other distribution, the Company shall mail to the Holder, at least ten (10) days
prior to such record date, a notice specifying the date on which any such record is to be taken for the purpose of such dividend or distribution.

 

(b)            Covenants
as to Exercise Shares. The Company covenants and agrees that all Conversion Shares that may be issued upon the exercise of the rights
represented by this Warrant will, upon issuance in accordance with the terms hereof, be validly issued and outstanding, fully paid and
nonassessable, and free from all taxes, liens and charges with respect to the issuance thereof. The Company further covenants and agrees
that the Company will at all times during the Exercise Period have authorized and reserved, free from preemptive rights, a sufficient
number of shares of its Preferred Stock to provide for the exercise of the rights represented by this Warrant. If at any time during the
Exercise Period the number of authorized but unissued shares of Preferred Stock shall not be sufficient to permit exercise of this Warrant,
the Company will take such corporate action as may, in the opinion of its counsel, be necessary to increase its authorized but unissued
shares of Preferred Stock to such number of shares as shall be sufficient for such purposes.

 

7.            Adjustment
of Exercise Price and Number of Conversion Shares. The number and kind of Conversion Shares purchasable upon exercise of this Warrant
and the Exercise Price shall be subject to adjustment from time to time as follows:

 

(a)            Subdivisions,
Combinations and Other Issuances. If the Company shall at any time after the issuance but prior to the expiration of this Warrant
subdivide its Preferred Stock, by split-up or otherwise, or combine its Preferred Stock, or issue additional shares of its Preferred Stock
or Common Stock as a dividend with respect to any shares of its Preferred Stock, the number of Conversion Shares issuable on the exercise
of this Warrant shall forthwith be proportionately increased in the case of a subdivision or stock dividend, or proportionately decreased
in the case of a combination. Appropriate adjustments shall also be made to the Exercise Price payable per share, but the aggregate Exercise
Price payable for the total number of Conversion Shares purchasable under this Warrant (as adjusted) shall remain the same. Any adjustment
under this Section 7(a) shall become effective at the close of business on the date the subdivision or combination becomes effective,
or as of the record date of such dividend, or in the event that no record date is fixed, upon the making of such dividend.

 

    6 

     

    

 

(b)            Reclassification,
Reorganization and Consolidation. In case of any reclassification, capital reorganization or change in the capital stock of the Company
(other than as a result of a subdivision, combination or stock dividend provided for in Section 7(a) above), then, as
a condition of such reclassification, reorganization or change, lawful provision shall be made, and duly executed documents evidencing
the same from the Company or its successor shall be delivered to the Holder, so that the Holder shall have the right at any time prior
to the expiration of this Warrant to purchase, at a total price equal to that payable upon the exercise of this Warrant, the kind and
amount of shares of stock and other securities or property receivable in connection with such reclassification, reorganization or change
by a holder of the same number and type of securities as were purchasable as Conversion Shares by the Holder immediately prior to such
reclassification, reorganization or change. In any such case appropriate provisions shall be made with respect to the rights and interest
of the Holder so that the provisions hereof shall thereafter be applicable with respect to any shares of stock or other securities or
property deliverable upon exercise hereof, and appropriate adjustments shall be made to the Exercise Price per Conversion Share payable
hereunder, provided the aggregate Exercise Price shall remain the same.

 

(c)            Corporate
Transaction. In the event of a Corporate Transaction, pursuant to which the Holder would have been entitled to receive cash consideration
per Conversion Share in an amount greater than the Exercise Price if the Holder had exercised its rights pursuant to this Warrant immediately
prior thereto, the Company shall pay to the Holder, at the closing of such transaction, an amount equal to (i) the number of Conversion
Shares issuable hereunder, multiplied by (ii) the difference of (A) the cash consideration per Conversion Share that the Holder
would have received if it had exercised its rights pursuant to this Warrant immediately prior to the closing of such transaction, minus
(B) the Exercise Price. This Warrant, and all rights of the Holder hereunder, shall automatically be terminated immediately upon
delivery of such payment. If the Holder would have been entitled to receive cash consideration per Share in an amount equal to or less
than the Warrant Price if the Holder had exercised its rights pursuant to this Warrant immediately prior to any such transaction, then
this Warrant, and all rights of the Holder hereunder, shall automatically be terminated upon the closing of any such transaction.

 

(d)            Adjustments
for Diluting Issuances. Without duplication of any adjustment otherwise provided for in this Section 7, the number of shares
of common stock issuable upon conversion of the Conversion Shares shall be subject to anti-dilution adjustment from time to time in the
manner set forth in the Company’s Certificate of Incorporation as if the Conversion Shares were issued and outstanding on and as
of the date of any such required adjustment.

 

(e)            Notice
of Adjustment. When any adjustment is required to be made in the number or kind of shares purchasable upon exercise of the Warrant,
or in the Exercise Price, the Company shall promptly notify the Holder of such event and of the number of Conversion Shares or other securities
or property thereafter purchasable upon exercise of this Warrant.

 

    7 

     

    

 

(f)            Conversion
of Preferred Stock. In the event that all outstanding shares of Preferred Stock are converted to Common Stock, or any other security,
in accordance with the terms of the Restated Certificate in connection with the IPO, a Corporate Transaction or other event, this Warrant
shall become exercisable for Common Stock or such other security.

 

8.            No
Fractional Shares or Scrip.     No fractional shares or scrip representing
fractional shares shall be issued upon the exercise of this Warrant, but in lieu of such fractional shares the Company shall make
a cash payment therefor on the basis of the Exercise Price then in effect.

 

9.            No
Stockholder Rights. Other than in respect of the adjustments provided in Section 7 hereof, prior to exercise of this Warrant,
the Holder shall not be entitled to any rights of a stockholder with respect to the Conversion Shares, including (without limitation)
the right to vote such Conversion Shares, receive dividends or other distributions thereon, exercise preemptive rights or be notified
of stockholder meetings, and except as otherwise provided in this Warrant or the Purchase Agreement, such Holder shall not be entitled
to any stockholder notice or other communication concerning the business or affairs of the Company.

 

		10.	Notice of Certain Events. If the Company proposes at any time to:

 

(a)           declare
any dividend or distribution upon the outstanding shares of the Company’s capital stock, whether in cash, property, stock, or other
securities and whether or not a regular cash dividend;

 

(b)           effect
any reclassification, exchange, combination, substitution, reorganization or recapitalization of the outstanding shares of the Company’s
capital stock;

 

		(c)	effect a Corporate Transaction or to liquidate, dissolve or wind up; or

 

		(d)	effect the IPO;

 

then, in connection with each such event, the
Company shall give Holder:

 

(i)            at
least seven (7) Business Days prior written notice of the date on which a record will be taken for such dividend, distribution, or
subscription rights (and specifying the date on which the holders of outstanding shares of the Company’s capital stock will be entitled
thereto) or for determining rights to vote, if any, in respect of the matters referred to in (a) above;

 

(ii)            in
the case of the matters referred to in (b) and (c) above at least seven (7) business days prior written notice of the date
when the same will take place (and specifying the date on which the holders of outstanding shares of the Company’s capital stock
will be entitled to exchange their shares for the securities or other property deliverable upon the occurrence of such event and such
reasonable information as Holder may reasonably require regarding the treatment of this Warrant in connection with such event giving rise
to the notice); and

 

(iii)            with
respect to the IPO, at least seven (7) business days prior written notice of the date on which the Company proposes to file its registration
statement in connection therewith.

 

    8 

     

    

 

Company will also provide information requested
by Holder that is reasonably necessary to enable Holder to comply with Holder’s accounting or reporting requirements.

 

11.          Transfer
of Warrant. Subject to compliance with applicable federal and
state securities laws, this Warrant and all rights hereunder are transferable in whole or in part by the Holder to any person or
entity upon written notice to the Company. Within a reasonable time after the Company’s receipt of an executed Assignment Form in
the form attached hereto, the transfer shall be recorded on the books of the Company upon the surrender of this Warrant, properly endorsed,
to the Company at its principal offices, and the payment to the Company of all transfer taxes and other governmental charges imposed on
such transfer. In the event of a partial transfer, the Company shall issue to the new holders one or more appropriate new warrants.

 

12.           Governing
Law. This Warrant and any controversy arising out of or relating to this Warrant shall be governed by, and construed in accordance
with, the internal laws of the State of Delaware, without regard to conflict of law principles that would result in the application of
any law other than the law of the State of Delaware.

 

13.            Successors
and Assigns. The terms and provisions of this Warrant shall inure to the benefit of, and be binding upon, the Company and the holders
hereof and their respective successors and assigns.

 

14.            Titles
and Subtitles. The titles and subtitles used in this Warrant are used for convenience only and are not to be considered in construing
or interpreting this Warrant.

 

15.            Notices.
All notices and other communications given or made pursuant hereto shall be in writing and shall be deemed effectively given:
(a) upon personal delivery to the party to be notified, (b) when sent by confirmed electronic mail or facsimile if sent
during normal business hours of the recipient, and if not so confirmed, then on the next business day, (c) five
(5) days after having been sent by registered or certified mail, return receipt requested, postage prepaid, or (d) one
(1) day after deposit with a nationally recognized overnight courier, specifying next day delivery, with written verification
of receipt. All communications shall be sent to the respective parties at the following addresses (or at such other addresses as
shall be specified by notice given in accordance with this Section 15):

 

If to the Company:

 

RAPID MICRO BIOSYSTEMS, INC.

1001 Pawtucket Blvd.

Lowell, MA 01854

Attention: Chief Executive

 

Officer If to Holders:

 

At the addresses shown on the signature pages hereto.

 

    9 

     

    

 

16.            Amendments
and Waivers. This Warrant is one of a series of Warrants to Purchase Shares of Preferred Stock in substantially the same form and
issued as part of a bridge financing consummated by the Company and the other parties thereto on or about March 4, 2016 (collectively,
the “Warrants”). Any term of this Warrant may be amended and the observance of any term of this Warrant may be waived
(either generally or in a particular instance and either retroactively or prospectively), with the written consent of the Company and
the holders of Warrants holding at least 66% of the Conversion Shares issuable upon exercise of the Warrants; provided that such
amendment affects each such holder in materially the same manner. Any waiver or amendment effected in accordance with this Section shall
be binding upon each party to a Warrant at the time outstanding and each future holder of all such Warrants.

 

17.            Severability.
If any provision of this Warrant is held to be unenforceable under applicable law, such provision shall be excluded from this Warrant
and the balance of the Warrant shall be interpreted as if such provision were so excluded and shall be enforceable in accordance with
its terms.

 

[Signature Page Follows]

 

    10 

     

    

 

IN WITNESS WHEREOF, the parties
have executed this Warrant as of the date first written above.

 

	 	RAPID MICRO BIOSYSTEMS, INC.

 

		By:	 
	 	 	President and Chief
Executive Officer

 

[Signature Page to Warrant]

 

    

     

    

 

IN WITNESS WHEREOF,
the parties have executed this Warrant as of the date first written above.

 

	 	 
	 	Name:

 

[Signature Page to Warrant]

 

     

     

    

 

NOTICE OF EXERCISE

 

RAPID MICRO BIOSYSTEMS, INC.

 

Attention: Corporate Secretary

 

The undersigned hereby elects to purchase, pursuant
to the provisions of the Warrant, as follows:

 

		 ̈	_____________ Conversion Shares pursuant to the terms of the attached
                                                                                                                                Warrant, and tenders herewith payment in cash of the Exercise Price of such Conversion Shares in full, together with all applicable
                                                                                                                                transfer taxes, if any.

 

		 ̈	Net Exercise the attached Warrant
with respect to                       
Conversion Shares.

 

The undersigned hereby represents and warrants
that Representations and Warranties in Section 5(b) of the Warrant are true and correct as of the date hereof.

 

		HOLDER:

 

	Date:	 	 	By:	 

 

	 	 	Address:	 
	 	 	 	 

 

Name in which shares should be registered:

 

	 	 

 

     

     

    

 

ASSIGNMENT FORM

 

(To assign the foregoing Warrant, execute

this form and supply required information.

 Do not use this form to purchase shares.)

 

FOR
VALUE RECEIVED, the foregoing Warrant and all rights evidenced thereby are hereby assigned to

 

	Name:	
	 	(Please Print)

 

	Address:	
	 	(Please Print)

 

	Dated:	 	 

 

	Holder’s

Signature:

	 	 

 

	Holder’s

Address:

	 	 

 

NOTE:
The signature to this Assignment Form must correspond with the name as it appears on the face of the Warrant. Officers of corporations
and those acting in a fiduciary or other representative capacity should provide proper evidence of authority to assign the foregoing Warrant.

 

    3 

     

    

 

Schedule of Holders of Warrants 
 to Purchase Common Stock   

 

	Name	 	Date of Issuance	 	Expiration Date	 	Conversion Shares Numerator	 
	Andrea Monath Schumacher	 	September 29, 2016	 	September 29, 2026	 	$	3,613.04	 
	Andrew Khouri	 	September 29, 2016	 	September 29, 2026	 	$	225.00	 
	Biomedical Sciences Investment Fund Pte Ltd	 	September 29, 2016	 	September 29, 2026	 	$	82,164.96	 
	Fletcher Spaght Ventures II, L.P.	 	September 29, 2016	 	September 29, 2026	 	$	238.49	 
	Foster & Foster Capital V LLC	 	September 29, 2016	 	September 29, 2026	 	$	24,649.49	 
	Foundation Investments of Ohio Ltd.	 	September 29, 2016	 	September 29, 2026	 	$	16,432.98	 
	FSV II, L.P.	 	September 29, 2016	 	September 29, 2026	 	$	23.99	 
	FSV II-B, L.P.	 	September 29, 2016	 	September 29, 2026	 	$	113.56	 
	Hepalink USA Inc.	 	October 5, 2016	 	October 5, 2026	 	$	82,164.96	 
	KPCB Holdings, Inc.	 	September 29, 2016	 	September 29, 2026	 	$	90,325.99	 
	Longitude Venture Partners II, L.P.	 	September 29, 2016	 	September 29, 2026	 	$	214,203.70	 
	Manbro P.E. IV, LP	 	September 29, 2016	 	September 29, 2026	 	$	41,082.47	 
	Margaret Blake Garvan Trust Margaret B Garvan And Thomas P Monath Co-TTE UA 11-01-2001	 	September 29, 2016	 	September 29, 2026	 	$	6,774.45	 
	Mellon Family Investment Company V	 	September 29, 2016	 	September 29, 2026	 	$	24,649.49	 
	MSF Private Equity Fund LLC	 	September 29, 2016	 	September 29, 2026	 	$	24,649.49	 
	Philip Stewart	 	September 29, 2016	 	September 29, 2026	 	$	1,643.28	 
	Quaker Bioventures II, L.P.	 	September 29, 2016	 	September 29, 2026	 	$	194,744.47	 
	Richard King Mellon Foundation	 	September 29, 2016	 	September 29, 2026	 	$	24,649.49	 
	Robert Spignesi	 	September 29, 2016	 	September 29, 2026	 	$	985.98	 
	TPG RAMB Holdings, L.P.	 	September 29, 2016	 	September 29, 2026	 	$	160,652.79	 
	TVM Life Science Ventures VI GmbH & Co. KG	 	September 29, 2016	 	September 29, 2026	 	$	83,157.07	 
	TVM Life Science Ventures VI, L.P.	 	September 29, 2016	 	September 29, 2026	 	$	28,503.67	 
	Waycross Ventures LLC	 	September 29, 2016	 	September 29, 2026	 	$	22,581.50	 
	Andrea Monath Schumacher	 	December 16, 2016	 	September 29, 2026	 	$	3,613.04	 
	Andrew Khouri	 	December 16, 2016	 	September 29, 2026	 	$	225.00	 
	Biomedical Sciences Investment Fund Pte Ltd	 	December 16, 2016	 	September 29, 2026	 	$	82,164.96	 
	Fletcher Spaght Ventures II, L.P.	 	December 16, 2016	 	September 29, 2026	 	$	238.49	 
	Foster & Foster Capital V LLC	 	December 16, 2016	 	September 29, 2026	 	$	24,649.49	 
	Foundation Investments of Ohio Ltd.	 	December 16, 2016	 	September 29, 2026	 	$	16,432.98	 
	FSV II, L.P.	 	December 16, 2016	 	September 29, 2026	 	$	23.99	 
	FSV II-B, L.P.	 	December 16, 2016	 	September 29, 2026	 	$	113.56	 
	Hepalink USA Inc.	 	December 16, 2016	 	September 29, 2026	 	$	82,164.96	 
	KPCB Holdings, Inc.,	 	December 16, 2016	 	September 29, 2026	 	$	90,325.99	 
	Longitude Venture Partners II, L.P.	 	December 16, 2016	 	September 29, 2026	 	$	214,203.70	 
	Manbro P.E. IV, LP	 	December 16, 2016	 	September 29, 2026	 	$	41,082.47	 
	Margaret Blake Garvan Trust Margaret B Garvan And Thomas P Monath Co-TTE UA 11-01-2001	 	December 16, 2016	 	September 29, 2026	 	$	6,774.45	 
	Mellon Family Investment Company V	 	December 16, 2016	 	September 29, 2026	 	$	24,649.49	 
	MSF Private Equity Fund LLC	 	December 16, 2016	 	September 29, 2026	 	$	24,649.49	 
	Philip Stewart	 	December 16, 2016	 	September 29, 2026	 	$	1,643.28	 

 

     

     

    

 

	Quaker Bioventures II, L.P.	 	December 16, 2016	 	September 29, 2026	 	$	194,744.47	 
	Richard King Mellon Foundation	 	December 16, 2016	 	September 29, 2026	 	$	24,649.49	 
	Robert Spignesi	 	December 16, 2016	 	September 29, 2026	 	$	985.98	 
	TPG RAMB Holdings, L.P.	 	December 16, 2016	 	September 29, 2026	 	$	160,652.79	 
	TVM Life Science Ventures VI GmbH & Co. KG	 	December 16, 2016	 	September 29, 2026	 	$	83,157.07	 
	TVM Life Science Ventures VI, L.P.	 	December 16, 2016	 	September 29, 2026	 	$	28,503.67	 
	Waycross Ventures LLC	 	December 16, 2016	 	September 29, 2026	 	$	22,581.50	 
	Andrea Monath Schumacher	 	March 30, 2017	 	September 29, 2026	 	$	2,408.69	 
	Biomedical Sciences Investment Fund Pte Ltd	 	March 30, 2017	 	September 29, 2026	 	$	54,776.64	 
	Foster & Foster Capital V LLC	 	March 30, 2017	 	September 29, 2026	 	$	16,432.99	 
	Foundation Investments of Ohio Ltd.	 	March 30, 2017	 	September 29, 2026	 	$	10,955.32	 
	Hepalink USA Inc.	 	March 30, 2017	 	September 29, 2026	 	$	54,776.64	 
	KPCB Holdings Inc.	 	March 30, 2017	 	September 29, 2026	 	$	60,217.32	 
	Longitude Venture Partners II, L.P.	 	March 30, 2017	 	September 29, 2026	 	$	142,802.47	 
	Manbro P.E. IV, LP	 	March 30, 2017	 	September 29, 2026	 	$	27,388.31	 
	Margaret Blake Garvan Trust Margaret B Garvan And Thomas P Monath Co-TTE UA 11-01-2001	 	March 30, 2017	 	September 29, 2026	 	$	4,516.30	 
	Mellon Family Investment Company V	 	March 30, 2017	 	September 29, 2026	 	$	16,432.99	 
	MSF Private Equity Fund LLC	 	March 30, 2017	 	September 29, 2026	 	$	16,432.99	 
	Quaker Bioventures II, L.P.	 	March 30, 2017	 	September 29, 2026	 	$	129,829.65	 
	Richard King Mellon Foundation	 	March 30, 2017	 	September 29, 2026	 	$	16,432.99	 
	TPG RAMB Holdings, L.P.	 	March 30, 2017	 	September 29, 2026	 	$	107,101.86	 
	TVM Life Science Ventures VI GmbH & Co. KG	 	March 30, 2017	 	September 29, 2026	 	$	55,438.05	 
	TVM Life Science Ventures VI, L.P.	 	March 30, 2017	 	September 29, 2026	 	$	19,002.44	 
	Waycross Ventures LLC	 	March 30, 2017	 	September 29, 2026	 	$	15,054.33	 

 

 

THIS WARRANT AND THE SECURITIES ISSUABLE UPON
THE EXERCISE HEREOF HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED. THEY MAY NOT BE SOLD, OFFERED FOR SALE,
PLEDGED, HYPOTHECATED, OR OTHERWISE TRANSFERRED EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933,
AS AMENDED, OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT REGISTRATION IS NOT REQUIRED UNDER SUCH ACT OR UNLESS SOLD PURSUANT
TO RULE 144 UNDER SUCH ACT.

 

	Date of Issuance:	Void after _________ __, 2026,
	________ __, ____	[unless earlier terminated pursuant to the terms hereof]

 

     

     

    

 

RAPID MICRO BIOSYSTEMS, INC.

WARRANT TO PURCHASE SHARES OF PREFERRED STOCK

 

This Warrant is issued to
____________________________________ or [his][her][its] assigns (the “Holder”) by Rapid Micro Biosystems, Inc.,
a Delaware corporation (the “Company”), pursuant to that certain Note and Warrant Purchase Agreement dated September 6,
2016 among the Company, the Holder and certain other investors, as the same may be amended, restated or otherwise modified from time to
time (the “Purchase Agreement”). Unless otherwise defined herein or in the Purchase Agreement, capitalized terms shall
have the following meanings:

 

“Conversion Shares”
shall mean (a) shares of such series of Preferred Stock as are issued in the Next Equity Financing if the Next Equity Financing is
consummated on or prior to [June 30][March 31], 2017; or (b) shares of Series C Preferred Stock if the Next Equity
Financing has not been consummated on or prior to [June 30][March 31], 2017.

 

“Corporate Transaction”
shall mean (A) the closing of the sale, transfer or other disposition of all or substantially all of the Company’s assets,
(B) the consummation of the merger or consolidation of the Company with or into another entity (except a merger or consolidation
in which the holders of capital stock of the Company immediately prior to such merger or consolidation continue to hold at least 50% of
the voting power of the capital stock of the Company or the surviving or acquiring entity), or (C) the closing of the transfer (whether
by merger, consolidation or otherwise), in one transaction or a series of related transactions, to a person or group of affiliated persons
(other than an underwriter of this corporation’s securities), of the Company’s securities if, after such closing, such person
or group of affiliated persons would hold 50% or more of the outstanding voting stock of this corporation (or the surviving or acquiring
entity); provided, however, that a transaction shall not constitute a Corporate Transaction if its sole purpose is to change
the state of the Company’s incorporation or to create a holding company that will be owned in substantially the same proportions
by the persons who held the Company’s securities immediately prior to such transaction. Notwithstanding the prior sentence, the
sale of shares of Preferred Stock in a bona fide financing transaction shall not be deemed a Corporate Transaction.

 

“Exercise Price”
shall mean: (a) the Next Round Price if this Warrant is exercisable for shares of Preferred Stock issued in the Next Equity Financing;
or (b) $1.19583365 (subject to appropriate adjustment in the event of any stock dividend, stock split, combination or other similar
event with respect to the Series C Preferred Stock) if this Warrant is exercisable for shares of Series C Preferred Stock.

 

“Next Equity Financing”
shall mean the next sale (or series of related sales) by the Company of its Preferred Stock following the Original Date of Issuance from
which the Company receives aggregate gross proceeds of not less than $10,000,000 (excluding the aggregate amount of any indebtedness of
the Company converted into Preferred Stock in the Next Equity Financing).

 

“Next Round Price”
shall mean the price per share of Preferred Stock paid by the investors in the Next Equity Financing (excluding, if applicable, any discounts
applied to the purchase price of any Preferred Stock issued in the Next Equity Financing upon conversion or cancellation of indebtedness).

 

     

     

    

 

“Original Date of Issuance” shall mean ________________.

 

“Preferred Stock” shall mean the Company’s
preferred stock, $0.01 par value

 

per share.

 

“Series C Preferred Stock” shall mean
the Company’s Series C Preferred Stock,

 

$0.01 par value per share.

 

1.            Purchase
of Shares; Number of Conversion Shares and Exercise Price. Subject to the terms and conditions set forth herein, the Holder is entitled,
upon surrender of this Warrant at the principal office of the Company (or at such other place as the Company shall notify the Holder in
writing), to purchase from the Company up to a number of fully paid and nonassessable Conversion Shares equal to $___________.__ divided
by the Exercise Price. The Conversion Shares and the Exercise Price of the Conversion Shares shall be subject to adjustment pursuant to
Section 7 hereof.

 

2.            Exercise
Period; Termination. Unless earlier terminated pursuant to the terms hereof, this Warrant shall be exercisable, in whole or in part,
during the period commencing on the Original Date of Issuance and ending at 5:00 p.m. pacific time on _________ __, 2026 (the “Exercise
Period”). In the event that this Warrant has not been otherwise terminated pursuant to this Section 2, upon the expiration
of the Exercise Period, if the fair market value of one Conversion Share (or other security issuable upon the exercise hereof) as determined
in accordance with Section 4 below is greater than the Exercise Price in effect on such date, then this Warrant, to the extent then
exercisable, shall automatically be deemed on and as of such date to be exercised pursuant to Section 4 below as to all Conversion
Shares (or such other securities) for which it shall not have been previously exercised, and the Company shall, within a reasonable time,
deliver a certificate representing the Conversion Shares (or such other securities) issued upon such exercise to Holder.

 

		3.	Method of Exercise.

 

(a)          While
this Warrant remains outstanding and exercisable in accordance with Section 2 above, the Holder may exercise, in whole or in part,
the purchase rights evidenced hereby. Such exercise shall be effected by:

 

(i)            the
surrender of the Warrant, together with a duly executed copy of the Notice of Exercise attached hereto, to the Secretary of the Company
at its principal office (or at such other place as the Company shall notify the Holder in writing); and

 

(ii)         the
payment to the Company of an amount equal to the aggregate Exercise Price for the number of Conversion Shares being purchased.

 

(b)          Each
exercise of this Warrant shall be deemed to have been effected immediately prior to the close of business on the day on which this Warrant
is surrendered to the Company as provided in Section 3(a) above. At such time, the person or persons in whose name or names
any certificate for the Conversion Shares shall be issuable upon such exercise as provided in Section 3(c) below shall be deemed
to have become the holder or holders of record of the Conversion Shares represented by such certificate.

 

     

     

    

 

(c)          As
soon as practicable after the exercise of this Warrant in whole or in part, and in any event within twenty (20) days thereafter, the Company
at its expense will cause to be issued in the name of, and delivered to, the Holder, or as such Holder (upon payment by such Holder of
any applicable transfer taxes) may direct:

 

(i)            a
certificate or certificates for the number of Conversion Shares to which such Holder shall be entitled, and

 

(ii)          in
case such exercise is in part only, a new warrant or warrants (dated the date hereof) of like tenor, calling in the aggregate on the face
or faces thereof for the number of Conversion Shares equal to the number of such Conversion Shares called for on the face of this Warrant
minus the number of Conversion Shares purchased by the Holder upon all exercises made in accordance with Section 3(a) above
or Section 4 below.

 

4.            Net
Exercise. In lieu of exercising this Warrant for cash, the Holder may elect to receive shares equal to the value of this Warrant (or
the portion thereof being exercised) by surrender of this Warrant at the principal office of the Company together with notice of such
election (a “Net Exercise”). A Holder who Net Exercises shall have the rights described in Sections 3(b) and 3(c) hereof,
and the Company shall issue to such Holder a number of Conversion Shares computed using the following formula:

 

 

Where

 

X
= The number of Conversion
Shares to be issued to the Holder.

 

Y = The number of
Conversion Shares purchasable under this Warrant or, if only a portion of the Warrant is being exercised, the portion of the Warrant being
cancelled (at the date of such calculation).

 

A = The fair market
value of one (1) Conversion Share (at the date of such calculation).

 

B = The Exercise Price (as adjusted
to the date of such calculations).

 

For purposes of this Section 4,
the fair market value of a Conversion Share shall mean the average of the closing price of the Conversion Shares (or equivalent shares
of Common Stock underlying the Conversion Shares) quoted in the over-the-counter market in which the Conversion Shares (or equivalent
shares of Common Stock underlying the Conversion Shares) are traded or the closing price quoted on any exchange or electronic securities
market on which the Conversion Shares (or equivalent shares of Common Stock underlying the Warrants) are listed, whichever is applicable,
as published in The Wall Street Journal for the five (5) trading days prior to the date of determination of fair market value
(or such shorter period of time during which such Conversion Shares were traded over-the-counter or on such exchange). In the event that
this Warrant is exercised pursuant to this Section 4 in connection with the Company’s first underwritten public offering pursuant
to an effective registration statement under the Securities Act of 1933, as amended (the “IPO”), the fair market value
per Conversion Share shall be the product of (a) the per share offering price to the public of the IPO, and (b) the number of
shares of Common Stock into which each Conversion Share is convertible at the time of such exercise or, if the Conversion Shares are shares
of Common Stock, one. In the event that this Warrant is exercised not in connection with the IPO and the Conversion Shares are not traded
on the over- the-counter market, an exchange or an electronic securities market, the fair market value shall be the price per Conversion
Share that the Company could obtain from a willing buyer for Conversion Shares sold by the Company from authorized but unissued Conversion
Shares, as such prices shall be determined in reasonable good faith by the Company’s Board of Directors.

 

     

     

    

 

		5.	[Omitted.]

 

		6.	Covenants of the Company.

 

(a)          Notices
of Record Date. In the event of any taking by the Company of a record of the holders of any class of securities for the purpose of
determining the holders thereof who are entitled to receive any dividend (other than a cash dividend which is the same as cash dividends
paid in previous quarters or a stock dividend) or other distribution, the Company shall mail to the Holder, at least ten (10) days
prior to such record date, a notice specifying the date on which any such record is to be taken for the purpose of such dividend or distribution.

 

(b)          Covenants
as to Exercise Shares. The Company covenants and agrees that all Conversion Shares that may be issued upon the exercise of the rights
represented by this Warrant will, upon issuance in accordance with the terms hereof, be validly issued and outstanding, fully paid and
nonassessable, and free from all taxes, liens and charges with respect to the issuance thereof. The Company further covenants and agrees
that the Company will at all times during the Exercise Period have authorized and reserved, free from preemptive rights, a sufficient
number of shares of its Preferred Stock to provide for the exercise of the rights represented by this Warrant. If at any time during the
Exercise Period the number of authorized but unissued shares of Preferred Stock shall not be sufficient to permit exercise of this
Warrant, the Company will take such corporate action as may, in the opinion of its counsel, be necessary to increase its authorized but
unissued shares of Preferred Stock to such number of shares as shall be sufficient for such purposes.

 

7.            Adjustment
of Exercise Price and Number of Conversion Shares. The number and kind of Conversion Shares purchasable upon exercise of this Warrant
and the Exercise Price shall be subject to adjustment from time to time as follows:

 

(a)            Subdivisions,
Combinations and Other Issuances. If the Company shall at any time after the issuance but prior to the expiration of this Warrant
subdivide its Preferred Stock, by split-up or otherwise, or combine its Preferred Stock, or issue additional shares of its Preferred Stock
or Common Stock as a dividend with respect to any shares of its Preferred Stock, the number of Conversion Shares issuable on the exercise
of this Warrant shall forthwith be proportionately increased in the case of a subdivision or stock dividend, or proportionately decreased
in the case of a combination. Appropriate adjustments shall also be made to the Exercise Price payable per share, but the aggregate Exercise
Price payable for the total number of Conversion Shares purchasable under this Warrant (as adjusted) shall remain the same. Any adjustment
under this Section 7(a) shall become effective at the close of business on the date the subdivision or combination becomes effective,
or as of the record date of such dividend, or in the event that no record date is fixed, upon the making of such dividend.

 

     

     

    

 

(b)           Reclassification,
Reorganization and Consolidation. In case of any reclassification, capital reorganization or change in the capital stock of the Company
(other than as a result of a subdivision, combination or stock dividend provided for in Section 7(a) above), then, as a condition
of such reclassification, reorganization or change, lawful provision shall be made, and duly executed documents evidencing the same from
the Company or its successor shall be delivered to the Holder, so that the Holder shall have the right at any time prior to the expiration
of this Warrant to purchase, at a total price equal to that payable upon the exercise of this Warrant, the kind and amount of shares of
stock and other securities or property receivable in connection with such reclassification, reorganization or change by a holder of the
same number and type of securities as were purchasable as Conversion Shares by the Holder immediately prior to such reclassification,
reorganization or change. In any such case appropriate provisions shall be made with respect to the rights and interest of the Holder
so that the provisions hereof shall thereafter be applicable with respect to any shares of stock or other securities or property deliverable
upon exercise hereof, and appropriate adjustments shall be made to the Exercise Price per Conversion Share payable hereunder, provided
the aggregate Exercise Price shall remain the same.

 

(c)           Corporate
Transaction. In the event of a Corporate Transaction, pursuant to which the Holder would have been entitled to receive cash consideration
per Conversion Share in an amount greater than the Exercise Price if the Holder had exercised [his][her][its] rights pursuant to this
Warrant immediately prior thereto, the Company shall pay to the Holder, at the closing of such transaction, an amount equal to (i) the
number of Conversion Shares issuable hereunder, multiplied by (ii) the difference of (A) the cash consideration per Conversion
Share that the Holder would have received if [he][she][it] had exercised [his][her][its] rights pursuant to this Warrant immediately prior
to the closing of such transaction, minus (B) the Exercise Price. This Warrant, and all rights of the Holder hereunder, shall automatically
be terminated immediately upon delivery of such payment. If the Holder would have been entitled to receive cash consideration per Share
in an amount equal to or less than the Warrant Price if the Holder had exercised [his][her][its] rights pursuant to this Warrant
immediately prior to any such transaction, then this Warrant, and all rights of the Holder hereunder, shall automatically be terminated
upon the closing of any such transaction.

 

(d)            Adjustments
for Diluting Issuances. Without duplication of any adjustment otherwise provided for in this Section 7, the number of shares
of common stock issuable upon conversion of the Conversion Shares shall be subject to anti-dilution adjustment from time to time in the
manner set forth in the Company’s Certificate of Incorporation as if the Conversion Shares were issued and outstanding on and as
of the date of any such required adjustment.

 

(e)            Notice
of Adjustment. When any adjustment is required to be made in the number or kind of shares purchasable upon exercise of the Warrant,
or in the Exercise Price, the Company shall promptly notify the Holder of such event and of the number of Conversion Shares or other securities
or property thereafter purchasable upon exercise of this Warrant.

 

(f)            Conversion
of Preferred Stock. In the event that all outstanding shares of Preferred Stock are converted to Common Stock, or any other security,
in accordance with the terms of the Restated Certificate in connection with the IPO, a Corporate Transaction or other event, this Warrant
shall become exercisable for Common Stock or such other security.

 

     

     

    

 

8.           No
Fractional Shares or Scrip. No fractional shares or scrip representing fractional shares shall be issued upon the exercise of this
Warrant, but in lieu of such fractional shares the Company shall make a cash payment therefor on the basis of the Exercise Price then
in effect.

 

9.           No
Stockholder Rights. Other than in respect of the adjustments provided in Section 7 hereof, prior to exercise of this Warrant,
the Holder shall not be entitled to any rights of a stockholder with respect to the Conversion Shares, including (without limitation)
the right to vote such Conversion Shares, receive dividends or other distributions thereon, exercise preemptive rights or be notified
of stockholder meetings, and except as otherwise provided in this Warrant or the Purchase Agreement, such Holder shall not be entitled
to any stockholder notice or other communication concerning the business or affairs of the Company.

 

		10.	Notice of Certain Events. If the Company proposes at any time to:

 

(a)          declare
any dividend or distribution upon the outstanding shares of the Company’s capital stock, whether in cash, property, stock, or other
securities and whether or not a regular cash dividend;

 

(b)         effect
any reclassification, exchange, combination, substitution, reorganization or recapitalization of the outstanding shares of the Company’s
capital stock;

 

		(c)	effect a Corporate Transaction or to liquidate, dissolve or wind up; or

 

		(d)	effect the IPO;

 

then, in connection with each such event, the Company shall give Holder:

 

(i)           at
least seven (7) Business Days prior written notice of the date on which a record will be taken for such dividend, distribution, or
subscription rights (and specifying the date on which the holders of outstanding shares of the Company’s capital stock will be entitled
thereto) or for determining rights to vote, if any, in respect of the matters referred to in (a) above;

 

(ii)            in
the case of the matters referred to in (b) and (c) above at least seven (7) business days prior written notice of the date
when the same will take place (and specifying the date on which the holders of outstanding shares of the Company’s capital stock
will be entitled to exchange their shares for the securities or other property deliverable upon the occurrence of such event and such
reasonable information as Holder may reasonably require regarding the treatment of this Warrant in connection with such event giving rise
to the notice); and

 

(iii)            with
respect to the IPO, at least seven (7) business days prior written notice of the date on which the Company proposes to file its registration
statement in connection therewith.

 

Company will also provide
information requested by Holder that is reasonably necessary to enable Holder to comply with Holder’s accounting or reporting requirements.

 

     

     

    

 

11.          Transfer
of Warrant. Subject to compliance with applicable federal and state securities laws, this Warrant and all rights hereunder are transferable
in whole or in part by the Holder to any person or entity upon written notice to the Company. Within a reasonable time after the Company’s
receipt of an executed Assignment Form in the form attached hereto, the transfer shall be recorded on the books of the Company upon
the surrender of this Warrant, properly endorsed, to the Company at its principal offices, and the payment to the Company of all transfer
taxes and other governmental charges imposed on such transfer. In the event of a partial transfer, the Company shall issue to the new
holders one or more appropriate new warrants.

 

12.            Successors
and Assigns. The terms and provisions of this Warrant shall inure to the benefit of, and be binding upon, the Company and the holders
hereof and their respective successors and assigns.

 

13.            Titles
and Subtitles. The titles and subtitles used in this Warrant are used for convenience only and are not to be considered in construing
or interpreting this Warrant.

 

14.            Amendments
and Waivers; Resolution of Controversies; Notices. The amendment or waiver of any term of this Warrant, the resolution of any controversy
or claim arising out of or relating to this Warrant and the provision of any notices under this Warrant shall be conducted pursuant to
the terms of the Purchase Agreement.

 

15.            Severability.
If any provision of this Warrant is held to be unenforceable under applicable law, such provision shall be excluded from this Warrant
and the balance of the Warrant shall be interpreted as if such provision were so excluded and shall be enforceable in accordance with
its terms.

 

     

     

    

 

IN WITNESS WHEREOF, the parties have
executed this Warrant as of the date first written above.

 

	 	RAPID MICRO BIOSYSTEMS, INC.
	 	 	 
	 	 	 
	 	By:	 
	 	 	President and Chief Executive Officer

 

     

     

    

 

IN WITNESS WHEREOF, the parties have executed this
Warrant as of the date first written above.

 

		By:	 
	 	Name:

 

     

     

    

 

NOTICE OF EXERCISE

 

RAPID MICRO BIOSYSTEMS, INC.

 

Attention: Corporate Secretary

 

The undersigned hereby elects to purchase, pursuant
to the provisions of the Warrant, as follows:

 

		 ̈	                        Conversion Shares
                                            pursuant to the terms of the attached Warrant, and tenders herewith payment in cash of the
                                            Exercise Price of such Conversion Shares in full, together with all applicable transfer taxes,
                                            if any.

 

		 ̈	Net
Exercise the attached Warrant with respect to                         Conversion
Shares.

 

The undersigned hereby represents
and warrants that Representations and Warranties of the undersigned in Section 5 of the Purchase Agreement are true and correct as
of the date hereof.

 

	 	 	 	 	HOLDER:
	 	 	 	 	 	 
	 	 	 	 	 	 
	Date:	 	 	 	By:	 
	 	 	 	 	 	 

 

	 	 	 	Address:	 
	 	 	 	 	 

 

 

	Name in which shares should be registered:	 
	 	 
	 	 

 

     

     

    

 

ASSIGNMENT FORM

 

(To assign the foregoing Warrant, execute

this form and supply required information. 

Do not use this form to purchase shares.)

 

FOR
VALUE RECEIVED, the foregoing Warrant and all rights evidenced thereby are hereby assigned to

 

	Name:	 
	 	(Please Print)

 

	Address:	 
	 	(Please Print)

 

 

	Dated:	 	 

 

 

Holder’s

	Signature:	 	 

 

 

Holder’s

	Address:	 	 

 

 

NOTE:
The signature to this Assignment Form must correspond with the name as it appears on the face of the Warrant. Officers of corporations
and those acting in a fiduciary or other representative capacity should provide proper evidence of authority to assign the foregoing Warrant.

 

    3

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