Exhibit 10.5


 


UNIT Subscription
AGREEMENT


 


THIS UNIT SUBSCRIPTION AGREEMENT (as it
may from time to time be amended, this “Agreement”), dated as of December 7, 2020, is entered into by and among
Concord Acquisition Corp, a Delaware corporation (the “Company”), and CA Co-Investment LLC, a Delaware limited
liability company (the “Purchaser”).


  


WHEREAS, the Company intends to consummate
an initial public offering of the Company’s units (the “Public Offering”), each unit consisting of one
share of Class A common stock of the Company, par value $0.0001 per share (each, a “Share”), and one-half of
one redeemable warrant, each whole warrant entitling the holder to purchase one Share at an exercise price of $11.50 per Share,
as set forth in the Company’s Registration Statement on Form S-1, filed with the U.S. Securities and Exchange Commission,
File Number 333-249654 (the “Registration Statement”), under the Securities Act of 1933, as amended (the “Securities
Act”).


 


WHEREAS, the Purchaser has agreed to purchase,
at a price of $10.00 per unit, an aggregate of 218,569 units (and up to 241,711 units if the underwriters in the Public Offering
exercise their over-allotment option in full) (the “Private Placement Units”), each Private Placement Unit
consisting of one Share (a “Private Placement Share”) and one-half of one redeemable warrant (a “Private
Placement Warrant”), each Private Placement Warrant entitling the holder to purchase one Share at an exercise price
of $11.50 per Share.


 


NOW THEREFORE, in consideration of the
mutual promises contained in this Agreement and other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged, the parties to this Agreement hereby, intending legally to be bound, agree as follows:


 


AGREEMENT


 


Section 1. Authorization, Purchase and
Sale; Terms of the Private Placement Units.


 


A. Authorization of the
Private Placement Securities. The Company has duly authorized the issuance and sale of the Private Placement Units, including
the Private Placement Shares and the Private Placement Warrants included in the Private Placement Units, and, subject to proper
exercise of the Private Placement Warrants and against payment therefor, the Shares underlying such Private Placement Warrants,
to the Purchaser.


 


B. Purchase and Sale of
the Private Placement Units.


 


(i) On the date of the consummation
of the Public Offering or on such earlier time and date as may be mutually agreed by the Purchaser and the Company (the “IPO
Closing Date”), the Company shall issue and sell to the Purchaser, and the Purchaser shall purchase from the Company,
218,569 Private Placement Units at a price of $10.00 per Private Placement Unit for an aggregate purchase price of $2,185,690
(the “Purchase Price”). The Purchaser shall pay, at least one (1) business day prior to the IPO Closing Date,
the Purchase Price by wire transfer of immediately available funds, to accounts designated by the Company, including to the trust
account (the “Trust Account”), at a financial institution to be chosen by the Company, maintained by Continental
Stock Transfer & Trust Company, acting as trustee, in accordance with the Company’s wiring instructions. On the IPO
Closing Date, subject to receipt of funds pursuant to the immediately prior sentence, the Company shall effect such delivery in
book-entry form.


 


(ii) On the date of the consummation
of the closing of the over-allotment option, if any, in connection with the Public Offering or on such earlier time and date as
may be mutually agreed by the Purchaser and the Company (an “Over-allotment Closing Date,” and each Over-allotment
Closing Date (if any) and the IPO Closing Date, a “Closing Date”), the Company shall issue and sell to the
Purchaser, and the Purchaser shall purchase from the Company, up to 23,142 Private Placement Units (or, to the extent the over-allotment
option is not exercised in full, a lesser number of Private Placement Units in proportion to the portion of the over-allotment
option that is then exercised) at a price of $10.00 per Private Placement Unit for an aggregate purchase price of up to $231,420
(if the over-allotment option is exercised in full) (the “Over-allotment Purchase Price”). The Purchaser shall
pay the Over-allotment Purchase Price in accordance with the Company’s wire instruction by wire transfer of immediately
available funds to the Company or the Trust Account (as set forth in the wire instructions), at least one (1) business day prior
to the applicable Over-allotment Closing Date. On each Over-allotment Closing Date, subject to receipt of funds pursuant to the
immediately prior sentence, the Company shall effect such delivery in book-entry form.


 






     


     


    

 


C. Terms of the Private
Placement Securities.


 


(i) The Private Placement Units
are substantially identical to the units to be offered in the Public Offering except that (a) the Private Placement Units (including
the underlying Shares, Private Placement Warrants and the Shares issuable upon exercise of the Private Placement Warrants) will
not, except in limited circumstances, be transferable or salable until 30 days after the completion of the Company’s initial
business combination (the “Business Combination”) so long as they are held by the Purchaser or its permitted
transferees, (b) the Private Placement Warrants will expire on the fifth anniversary of the commencement of sales in the Public
Offering,(c) the Private Placement Units are being purchased pursuant to an exemption from the registration requirements of the
Securities Act and will become freely tradable only after the expiration of the lockup described above in clause (a) and they
are registered pursuant to the Registration Rights Agreement (as defined below) or an exemption from registration is available,
and the restrictions described above in clause (a) have expired and (d) each Private Placement Warrant shall have the terms
set forth for private placement warrants in a Warrant Agreement to be entered into by the Company and a warrant agent in connection
with the Public Offering (the “Warrant Agreement”).


 


(ii) The Private Placement Units
and their component parts and the related registration rights will be deemed compensation by the Financial Industry Regulatory
Authority (“FINRA”) and will therefore, pursuant to Rule 5110(e) of the FINRA Manual, be subject to a lock-up
for a period of 180 days immediately following the date of effectiveness or commencement of sales in the Public Offering, subject
to certain limited exceptions to permitted transferees hereunder and in accordance with FINRA Rule 5110(e)(2). Additionally, the
Private Placement Units and their component parts and the related registration rights may not be sold, transferred, assigned,
pledged or hypothecated during the foregoing 180 day period following the commencement of sales in the Public Offering except
to any underwriter or selected dealer participating in the Public Offering and the bona fide officers partners or affiliates of
the Purchaser and any such participating underwriter or selected dealer. Additionally, the Private Placement Units and their component
parts and the related registration rights will not be the subject of any hedging, short sale, derivative, put or call transaction
that would result in the economic disposition of such securities by any person for a period of 180 days immediately following
the date of effectiveness or commencement of sales in the Public Offering.


 


(iii) At the time of, or prior
to, the IPO Closing Date, the Company and the Purchaser shall enter into a registration rights agreement (the “Registration
Rights Agreement”) pursuant to which the Company will grant certain registration rights to the Purchaser relating to
the Private Placement Units, including the Private Placement Shares and the Private Placement Warrants included in the Private
Placement Units, and the Shares underlying the Private Placement Warrants.


 






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Section 2. Representations and Warranties
of the Company.


 


As a material inducement to the Purchaser
to enter into this Agreement and purchase the Private Placement Units, the Company hereby represents and warrants to the Purchaser
(which representations and warranties shall survive each Closing Date) that:


 


A. Incorporation and Corporate
Power. The Company is a corporation duly incorporated, validly existing and in good standing under the laws of the State of
Delaware and is qualified to do business in every jurisdiction in which the failure to so qualify would reasonably be expected
to have a material adverse effect on the financial condition, operating results or assets of the Company. The Company possesses
all requisite corporate power and authority necessary to carry out the transactions contemplated by this Agreement and the Warrant
Agreement.


 


B. Authorization; No Breach.


 


(i) The execution, delivery and
performance of this Agreement and the Private Placement Units, including the Private Placement Shares and the Private Placement
Warrants included in the Private Placement Units, and, subject to proper exercise of the Private Placement Warrants and against
payment therefor, the Shares underlying such Private Placement Warrants, have been duly authorized by the Company. This Agreement
constitutes the valid and binding obligation of the Company, enforceable in accordance with its terms, subject to bankruptcy,
insolvency, fraudulent conveyance, reorganization, moratorium and other laws of general applicability relating to or affecting
creditors’ rights and to general equitable principles (whether considered in a proceeding in equity or law). Upon issuance
in accordance with, and payment pursuant to, the terms of the Warrant Agreement (as applicable) and this Agreement, the Private
Placement Units, including the Private Placement Warrants included in the Private Placement Units, will constitute valid and binding
obligations of the Company, enforceable in accordance with their terms as of each Closing Date.


 


(ii) The execution and delivery
by the Company of this Agreement and the Private Placement Units, the issuance and sale of the Private Placement Units, the issuance
of the Private Placement Shares and the Private Placement Warrants included in the Private Placement Units and the Shares upon
exercise of the Private Placement Warrants and the fulfillment of and compliance with the respective terms hereof and thereof
by the Company, do not and will not as of each Closing Date (a) conflict with or result in a breach of the terms, conditions or
provisions of, (b) constitute a default under, (c) result in the creation of any lien, security interest, charge or encumbrance
upon the Company’s share capital or assets under, (d) result in a violation of, or (e) require any authorization, consent,
approval, exemption or other action by or notice or declaration to, or filing with, any court or administrative or governmental
body or agency pursuant to the Company’s certificate of incorporation and bylaws or any material law, statute, rule or regulation
to which the Company is subject, or any agreement, order, judgment or decree to which the Company is subject, except for any filings
required after the date hereof under federal or state securities laws.


 


C. Title to Securities.
Upon issuance in accordance with, and payment pursuant to, the terms hereof and the Warrant Agreement (as applicable), the Private
Placement Shares included in the Private Placement Units and the Shares issuable upon exercise of the Private Placement Warrants
will be duly and validly issued, fully paid and nonassessable. On the date of issuance of the Private Placement Units, the Private
Placement Shares and the Shares issuable upon exercise of the Private Placement Warrants shall have been reserved for issuance.
Upon issuance in accordance with, and payment pursuant to, the terms hereof and the Warrant Agreement (as applicable), the Purchaser
will have good title to the Private Placement Units, including the Private Placement Shares and the Private Placement Warrants
included in the Private Placement Units, and the Shares issuable upon exercise of the Private Placement Warrants, free and clear
of all liens, claims and encumbrances of any kind, other than (i) transfer restrictions hereunder and under the other agreements
contemplated hereby, (ii) transfer restrictions under federal and state securities laws, and (iii) liens, claims or encumbrances
imposed due to the actions of the Purchaser.


 


D. Governmental Consents.
Assuming the accuracy of the representations and warranties made by the Purchaser in this Agreement, no consent, approval, order
or authorization of, or registration, qualification, designation, declaration or filing with, any federal, state or local governmental
authority is required on the part of the Company in connection with the consummation of the transactions contemplated by this
Agreement, except for applicable requirements of the Securities Act.


 






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Section 3. Representations and Warranties
of the Purchaser.


 


As a material inducement to the Company
to enter into this Agreement and issue and sell the Private Placement Units to the Purchaser, the Purchaser hereby represents
and warrants to the Company (which representations and warranties shall survive each Closing Date) that:


 


A. Organization and Requisite
Authority. The Purchaser possesses all requisite power and authority necessary to carry out the transactions contemplated
by this Agreement.


 


B. Authorization; No Breach.


 


(i) This Agreement constitutes
a valid and binding obligation of the Purchaser, enforceable in accordance with its terms, subject to bankruptcy, insolvency,
fraudulent conveyance, reorganization, moratorium and other laws of general applicability relating to or affecting creditors’
rights and to general equitable principles (whether considered in a proceeding in equity or law).


 


(ii) The execution and delivery
by the Purchaser of this Agreement and the fulfillment of and compliance with the terms hereof by the Purchaser do not and shall
not as of each Closing Date (a) conflict with or result in a breach by the Purchaser of the terms, conditions or provisions of,
(b) constitute a default under, (c) result in the creation of any lien, security interest, charge or encumbrance upon the Purchaser’s
equity or assets under, (d) result in a violation of, or (e) require any authorization, consent, approval, exemption or other
action by or notice or declaration to, or filing with, any court or administrative or governmental body or agency pursuant to
the Purchaser’s organizational documents in effect on the date hereof or as may be amended prior to completion of the contemplated
Public Offering, or any material law, statute, rule or regulation to which the Purchaser is subject, or any agreement, instrument,
order, judgment or decree to which the Purchaser is subject, except for any filings required after the date hereof under federal
or state securities laws.


 


C. Investment Representations.


 


(i) The Purchaser is acquiring
the Private Placement Units, including the Private Placement Shares and the Private Placement Warrants included in the Private
Placement Units, and, upon exercise of the Private Placement Warrants, the Shares issuable upon such exercise (collectively, the
“Securities”) for its own account, for investment purposes only and not with a view towards, or for resale
in connection with, any public sale or distribution thereof.


 


(ii) The Purchaser is an “accredited
investor” as such term is defined in Rule 501(a)(3) of Regulation D, and the Purchaser has not experienced a disqualifying
event as enumerated pursuant to Rule 506(d) of Regulation D under the Securities Act.


 


(iii) The Purchaser understands
that the Securities are being offered and will be sold to it in reliance on specific exemptions from the registration requirements
of the United States federal and state securities laws and that the Company is relying upon the truth and accuracy of, and the
Purchaser’s compliance with, the representations and warranties of the Purchaser set forth herein in order to determine
the availability of such exemptions and the eligibility of the Purchaser to acquire such Securities.


 


(iv) The Purchaser did not decide
to enter into this Agreement as a result of any general solicitation or general advertising within the meaning of Rule 502(c)
of Regulation D under the Securities Act.


 






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(v) The Purchaser has been furnished
with all materials relating to the business, finances and operations of the Company and materials relating to the offer and sale
of the Securities which have been requested by the Purchaser. The Purchaser has been afforded the opportunity to ask questions
of the executive officers and directors of the Company. The Purchaser understands that its investment in the Securities involves
a high degree of risk and it has sought such accounting, legal and tax advice as it has considered necessary to make an informed
investment decision with respect to the acquisition of the Securities.


 


(vi) The Purchaser understands
that no United States federal or state agency or any other government or governmental agency has passed on or made any recommendation
or endorsement of the Securities or the fairness or suitability of the investment in the Securities by the Purchaser nor have
such authorities passed upon or endorsed the merits of the offering of the Securities.


 


(vii) The Purchaser understands
that: (a) the Securities have not been and are not being registered under the Securities Act or any state securities laws, and
may not be offered for sale, sold, assigned or transferred unless (1) subsequently registered thereunder or (2) sold in reliance
on an exemption therefrom; (b) except as specifically set forth in the Registration Rights Agreement, neither the Company nor
any other person is under any obligation to register the Securities under the Securities Act or any state securities laws or to
comply with the terms and conditions of any exemption thereunder; and (c) Rule 144 adopted pursuant to the Securities Act will
not be available for resale transactions of Securities prior to a Business Combination and may not be available for resale transactions
of Securities after a Business Combination.


 


(viii) The Purchaser has such knowledge
and experience in financial and business matters, knowledge of the high degree of risk associated with investments in the securities
of companies in the development stage such as the Company, is capable of evaluating the merits and risks of an investment in the
Securities and is able to bear the economic risk of an investment in the Securities in the amount contemplated hereunder for an
indefinite period of time. The Purchaser has adequate means of providing for its current financial needs and contingencies and
will have no current or anticipated future needs for liquidity which would be jeopardized by the investment in the Securities.
The Purchaser can afford a complete loss of its investments in the Securities.


 


(ix) The Purchaser understands
that the Private Placement Units and the Shares included in the Private Placement Units shall bear the legend substantially in
the form of the following and be subject to appropriate “stop transfer restrictions”:


 


“THE SECURITIES REPRESENTED
HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY STATE SECURITIES LAWS, AND MAY NOT BE OFFERED,
SOLD, TRANSFERRED OR OTHERWISE DISPOSED OF UNLESS REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND ANY APPLICABLE
STATE SECURITIES LAWS OR AN EXEMPTION FROM REGISTRATION IS AVAILABLE. IN ADDITION, SUBJECT TO ANY ADDITIONAL LIMITATIONS ON TRANSFER
DESCRIBED IN THE LETTER AGREEMENT BY AND AMONG CONCORD ACQUISITION CORP (THE “COMPANY”), CONCORD SPONSOR GROUP LLC,
CA CO-INVESTMENT LLC AND THE OTHER PARTIES THERETO, THE SECURITIES REPRESENTED BY THIS CERTIFICATE MAY NOT BE SOLD OR TRANSFERRED
PRIOR TO THE DATE THAT IS THIRTY (30) DAYS AFTER THE DATE UPON WHICH THE COMPANY COMPLETES ITS INITIAL BUSINESS COMBINATION (AS
DEFINED IN ITS AMENDED AND RESTATED CERTIFICATE OF INCORPORATION) EXCEPT TO A PERMITTED TRANSFEREE (AS DESCRIBED IN THE LETTER
AGREEMENT REFERENCED ABOVE) WHO AGREES IN WRITING WITH THE COMPANY TO BE SUBJECT TO SUCH TRANSFER PROVISIONS.


 


SECURITIES EVIDENCED HEREBY SHALL
BE ENTITLED TO REGISTRATION RIGHTS UNDER A REGISTRATION RIGHTS AGREEMENT WITH THE COMPANY.”


 






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(x) The Purchaser understands that
the Private Placement Warrants shall bear the legend substantially in the form set forth in the Warrant Agreement and be subject
to appropriate “stop transfer restrictions.”


 


Section 4. Conditions of the Purchaser’s
Obligations.


 


The obligations of the Purchaser to purchase
and pay for the Private Placement Units are subject to the fulfillment, on or before each Closing Date, of each of the following
conditions:


 


A. Representations and Warranties.
The representations and warranties of the Company contained in Section 2 shall be true and correct at and as of such Closing Date
as though then made.


 


B. Performance. The
Company shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are
required to be performed or complied with by it on or before such Closing Date.


 


C. No Injunction. No
litigation, statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated
or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having
authority over the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this
Agreement or the Warrant Agreement.


 


D. Warrant Agreement and
Registration Rights Agreement. The Company shall have entered into the Warrant Agreement and the Registration Rights Agreement,
in each case on terms satisfactory to the Purchaser.


 


Section 5. Conditions of the Company’s
Obligations.


 


The obligations of the Company to the Purchaser
under this Agreement are subject to the fulfillment, on or before each Closing Date, of each of the following conditions:


 


A. Representations and Warranties.
The representations and warranties of the Purchaser contained in Section 3 shall be true and correct at and as of such Closing
Date as though then made.


 


B. Performance. The
Purchaser shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are
required to be performed or complied with by the Purchaser on or before such Closing Date.


 


C. Corporate Consents.
The Company shall have obtained the consent of its Board of Directors authorizing the execution, delivery and performance of this
Agreement and the Warrant Agreement and the issuance and sale of the Private Placement Units, including the Private Placement
Shares and the Private Placement Warrants included in the Private Placement Units, hereunder.


 


D. No Injunction. No
litigation, statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated
or endorsed by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having
authority over the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this
Agreement or the Warrant Agreement.


 


E. Warrant Agreement.
The Company shall have entered into the Warrant Agreement.


 






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Section 6. Termination.


 


This Agreement may be terminated by the
Company or the Purchaser at any time after December 31, 2020 upon written notice to the other party hereto if the closing of the
Public Offering does not occur prior to such date.


 


Section 7. Survival of Representations
and Warranties.


 


All of the representations and warranties
contained herein shall survive each Closing Date.


 


Section 8. Definitions.


 


Terms used but not otherwise defined in
this Agreement shall have the meaning assigned to such terms in the Registration Statement.


 


Section 9. Miscellaneous.


 


A. Successors and Assigns.
Except as otherwise expressly provided herein, all covenants and agreements contained in this Agreement by or on behalf of any
of the parties hereto shall bind and inure to the benefit of the respective successors of the parties hereto whether so expressed
or not. Notwithstanding the foregoing or anything to the contrary herein, the parties may not assign this Agreement, other than
assignments by the Purchaser to affiliates thereof (including, without limitation one or more of its members).


 


B. Severability. Whenever
possible, each provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable law,
but if any provision of this Agreement is held to be prohibited by or invalid under applicable law, such provision shall be ineffective
only to the extent of such prohibition or invalidity, without invalidating the remainder of this Agreement.


 


C. Counterparts. This
Agreement may be executed simultaneously in two or more counterparts, none of which need contain the signatures of more than one
party, but all such counterparts taken together shall constitute one and the same agreement. Signatures to this Agreement transmitted
via facsimile or e-mail shall be valid and effective to bind the party so signing.


 


D. Descriptive Headings;
Interpretation. The descriptive headings of this Agreement are inserted for convenience only and do not constitute a substantive
part of this Agreement. The use of the word “including” in this Agreement shall be by way of example rather than by
limitation.


 


E. Governing Law. This
Agreement shall be deemed to be a contract made under the laws of the State of New York and for all purposes shall be construed
in accordance with the internal laws of the State of New York, without giving effect to conflicts of law principles that would
result in the application of the laws of another jurisdiction.


 


F. Amendments. This
Agreement may not be amended, modified or waived as to any particular provision, except by a written instrument executed by all
parties hereto.


 


[Signature page follows]


 






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IN WITNESS WHEREOF, the parties hereto
have executed this Agreement to be effective as of the date first set forth above.



 


	 	COMPANY:
	 	 
	 	CONCORD Acquisition Corp
	 	 
	 	By:	/s/ Jeff Tuder
	 	Name:	Jeff Tuder
	 	Title:	Chief Executive Officer
	 	 	 
	 	PURCHASER:
	 	 
	 	CA CO-Investment LLC
	 	 
	 	By:	/s/ Owen Littman
	 	Name: 	Owen Littman
	 	Title:	Authorized Person



 


[Signature
Page to Unit Subscription Agreement]