Exhibit 10.1


 


November 3, 2021


 


Concord Acquisition Corp III


477 Madison Avenue

New York, NY 10022


 


	Re:	Initial Public Offering


 


Ladies and Gentlemen:


 


This letter (this “Letter Agreement”)
is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”) by and
between Concord Acquisition Corp III, a Delaware corporation (the “Company”), and Citigroup Global Markets Inc.
and Cowen and Company, LLC, as the representatives (the “Representatives”) of the several underwriters named
therein (each an “Underwriter” and collectively, the “Underwriters”), relating to
an underwritten initial public offering (the “Public Offering”), of up to 34,500,000 of the Company’s
units (including up to 4,500,000 units that may be purchased to cover the Underwriters’ option to purchase additional units, if
any) (the “Units”), each comprised of one share of Class A common stock of the Company, par value $0.0001
per share (“Class A Common Stock”), and one-half of one redeemable warrant (each whole warrant, a “Warrant”).
Each Warrant entitles the holder thereof to purchase one share of Class A Common Stock at a price of $11.50 per share, subject to
adjustment. The Units will be sold in the Public Offering pursuant to a registration statement on Form S-1 and prospectus (the “Prospectus”)
filed by the Company with the Securities and Exchange Commission (the “Commission”). Certain capitalized terms
used herein are defined in paragraph 11 hereof.


 


In order to induce the Company and the Underwriters
to enter into the Underwriting Agreement and to proceed with the Public Offering and for other good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged, Concord Sponsor Group III LLC, a Delaware limited liability company (the “Sponsor”),
CA2 Co-Investment LLC, a Delaware limited liability company (“Cowen Investments” and together with the Sponsor,
the “Holders”), and the other undersigned persons (each such other undersigned persons, an “Insider”
and collectively, the “Insiders”), each hereby agrees, severally but not jointly, with the Company as follows:


 


1. The Sponsor, Cowen Investments and each Insider
agree that if the Company seeks stockholder approval of a proposed Business Combination, then in connection with such proposed Business
Combination, it, he or she shall (i) vote any Shares owned by it, him or her in favor of any proposed Business Combination (including
any proposals recommended by the Company’s Board of Directors in connection with such Business Combination) and (ii) not redeem
any Shares owned by it, him or her in connection with such stockholder approval. If the Company seeks to consummate a proposed Business
Combination by engaging in a tender offer, the Sponsor, Cowen Investment and each Insider agrees that it, he or she will not sell or tender
any Shares owned by it, him or her in connection therewith.


 


2. The Sponsor, Cowen Investments and each
Insider agree that in the event that the Company fails to consummate a Business Combination within 18 months from the closing of the
Public Offering (or up to 24 months from the closing of the Public Offering if the Company extends the period of time to consummate
a Business Combination, as described in more detail in the Prospectus), or such later period as may be approved by the
Company’s stockholders in accordance with the Company’s amended and restated certificate of incorporation, the Sponsor,
Cowen Investments and each Insider shall take all reasonable steps to cause the Company to (i) cease all operations except for
the purpose of winding up, (ii) as promptly as reasonably possible but not more than 10 business days thereafter, subject to
lawfully available funds therefor, redeem 100% of the shares of Class A Common Stock sold as part of the Units in the Public
Offering (the “Offering Shares”), at a per share price, payable in cash, equal to the aggregate amount
then on deposit in the Trust Account, including interest earned on the funds held in the Trust Account and not previously released
to the Company to pay its taxes (which interest shall be net of taxes payable and less up to $100,000 of interest to pay dissolution
expenses), divided by the number of then outstanding Offering Shares, which redemption will completely extinguish all Public
Stockholders’ rights as stockholders (including the right to receive further liquidating distributions, if any) and
(iii) as promptly as reasonably possible following such redemption, subject to the approval of the Company’s remaining
stockholders and the Company’s board of directors, dissolve and liquidate, subject in each case to the Company’s
obligations under Delaware law to provide for claims of creditors and the other requirements of applicable law. The Sponsor, Cowen
Investments and each Insider agree to not propose any amendment to the Company’s amended and restated certificate of
incorporation (A) to modify the substance or timing of the Company’s obligation to allow redemption in connection with
the Company’s initial Business Combination or to redeem 100% of the Offering Shares if the Company does not complete its
initial Business Combination within 18 months from the closing of the Public Offering (or up to 24 months from the closing of the
Public Offering if the Company extends the period of time to consummate a Business Combination, as described in more detail in the
Prospectus) or (B) with respect to any other provision relating to stockholders’ rights or pre-initial Business
Combination activity, unless the Company provides its Public Stockholders with the opportunity to redeem their Offering Shares upon
approval of any such amendment at a per share price, payable in cash, equal to the aggregate amount then on deposit in the Trust
Account, including interest earned on the funds held in the Trust Account and not previously released to the Company to pay its
taxes (which interest shall be net of taxes payable), divided by the number of then outstanding Offering Shares.


 






     


     


    

 


The Sponsor, Cowen Investments and each Insider
acknowledge that it, he or she has no right, title, interest or claim of any kind in or to any monies held in the Trust Account or any
other asset of the Company as a result of any liquidation of the Company with respect to the Founder Shares and Private Placement Shares
held by it. The Sponsor, Cowen Investments and each Insider hereby further waive, with respect to any Shares held by it, him or her, if
any, any redemption rights it, he or she may have in connection with (x) the consummation of a Business Combination, including, without
limitation, any such rights available in the context of a stockholder vote to approve such Business Combination or in the context of a
tender offer made by the Company to purchase shares of Class A Common Stock and (y) a stockholder vote to approve an amendment
to the Company’s amended and restated certificate of incorporation (A) to modify the substance or timing of the Company’s
obligation to allow redemptions in connection with the Company’s initial Business Combination or to redeem 100% of the Offering
Shares if the Company has not consummated its initial Business Combination within 18 months from the closing of the Public Offering (or
up to 24 months from the closing of the Public Offering if the Company extends the period of time to consummate a Business Combination,
as described in more detail in the Prospectus) or (B) with respect to any other provision relating to stockholders’ rights
or pre-initial Business Combination activity (although the Sponsor, Cowen Investments and the Insiders shall be entitled to redemption
and liquidation rights with respect to any Offering Shares it or they hold if the Company fails to consummate a Business Combination within
18 months from the date of the closing of the Public Offering (or up to 24 months from the closing of the Public Offering if the Company
extends the period of time to consummate a Business Combination, as described in more detail in the Prospectus)).


 


3. Without limiting Cowen Investments’
obligations under paragraph 7 hereof, during the period commencing on the date of commencement of sales of the Public Offering and
ending 180 days after such date, Cowen Investments shall not sell, transfer, assign, pledge or hypothecate any of its Founder Shares
or Private Placement Warrants (or any shares of Class A Common Stock underlying the Private Placement Warrants), or subject any
of such securities to any hedging, short sale, derivative, put, or call transaction that would result in the effective economic
disposition of such securities, except as provided in FINRA Rule 5110(e)(1), which such restrictions shall not be subject to
release or waiver, with or without the consent of the Representatives, during the period commencing on the date of commencement of
sales of the Public Offering and ending 180 days after such date. Notwithstanding the provisions set forth in paragraphs
7(a) and (b) below, during the period commencing on the date of commencement of sales of the Public Offering and ending
180 days after such date, the Sponsor, Cowen Investments and each Insider shall not, without the prior written consent of the
Representatives, (i) offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or
contract to sell, grant any option, right or warrant to purchase, or otherwise transfer or dispose of, directly or indirectly, or
file with, or submit to, the Commission a registration statement under the Securities Act of 1933, as amended (the
 “Securities Act”), relating to any Units, shares of Class A Common Stock, Founder Shares, Warrants or
any securities convertible into, or exercisable, or exchangeable for, any Units, shares of Class A Common Stock, Founder
Shares, or Warrants, or publicly disclose the intention to undertake any of the foregoing, or (ii) enter into any swap or other
arrangement that transfers, in whole or in part, any of the economic consequences of ownership of any Units, shares of Class A
Common Stock, Founder Shares, or Warrants or any such other securities, whether any such transaction described in clause (i) or
(ii) above is to be settled by delivery of units or such other securities, in cash or otherwise; provided, however,
that the foregoing does not apply to the forfeiture of any Founder Shares pursuant to their terms or any transfer of Founder Shares
to any current or future independent director of the company (as long as such current or future independent director transferee is
subject to this Letter Agreement or executes an agreement substantially identical to the terms of this Letter Agreement, as
applicable to directors and officers at the time of such transfer; and as long as, to the extent any Section 16 reporting
obligation is triggered as a result of such transfer, any related Section 16 filing includes a practical explanation as to the
nature of the transfer). Each of the Insiders and the Sponsor acknowledges and agrees that, prior to the effective date of any
release or waiver, of the restrictions set forth in this paragraph 3 or paragraph 7 below, the Company may announce the impending
release or waiver by press release through a major news service at least two business days before the effective date of the release
or waiver. The provisions of this paragraph will not apply if (i) the release or waiver is effected solely to permit a transfer
of securities that is not for consideration and (ii) the transferee has agreed in writing to be bound by the same terms
described in this Letter Agreement to the extent and for the duration that such terms remain in effect at the time of the
transfer.


 






     


     


    

 


4. In the event of the liquidation of the Trust
Account, the Sponsor (which for purposes of clarification shall not extend to any other stockholders, members or managers of the Sponsor)
agrees to indemnify and hold harmless the Company against any and all loss, liability, claim, damage and expense whatsoever (including,
but not limited to, any and all legal or other expenses reasonably incurred in investigating, preparing or defending against any litigation,
whether pending or threatened, or any claim whatsoever) to which the Company may become subject as a result of any claim by (i) any
third party (other than the Company’s independent registered public accounting firm) for services rendered or products sold to the
Company or (ii) a prospective target business with which the Company has discussed entering into a transaction agreement (a “Target”);
provided, however, that such indemnification of the Company by the Sponsor shall apply only to the extent necessary to ensure
that such claims by a third party for services rendered (other than the Company’s independent registered public accounting firm)
or products sold to the Company or a Target do not reduce the amount of funds in the Trust Account to below (i) $10.20 per Offering
Share or (ii) such lesser amount per Offering Share held in the Trust Account as of the date of the liquidation of the Trust Account
due to reductions in the value of the trust assets as of the date of the liquidation of the Trust Account, in each case, net of the amount
of interest which may be withdrawn to pay taxes, except as to any claims by a third party who executed a waiver of any and all rights
to seek access to the Trust Account and except as to any claims under the Company’s indemnity of the Underwriters against certain
liabilities, including liabilities under the Securities Act of 1933, as amended. In the event that any such executed waiver is deemed
to be unenforceable against such third party, the Sponsor shall not be responsible to the extent of any liability for such third party
claims. The Sponsor shall have the right to defend against any such claim with counsel of its choice reasonably satisfactory to the Company
if, within 15 days following written receipt of notice of the claim to the Sponsor, the Sponsor notifies the Company in writing that it
shall undertake such defense.


 


5. (a) To the extent that the Underwriters do not exercise their option to
purchase up to an additional 4,500,000 Units within 45 days from the date of the Prospectus (and as further described in the Prospectus),
(x) the Sponsor agrees that it shall forfeit, at no cost, a number of Founder Shares in the aggregate equal to 1,051,363 multiplied
by a fraction, (i) the numerator of which is 4,500,000 minus the number of Units purchased by the Underwriters upon the exercise
of their option to purchase additional Units and (ii) the denominator of which is 4,500,000 and (y) Cowen Investments agrees
that it shall forfeit, at no cost, a number of Founder Shares in the aggregate equal to 73,637 multiplied by a fraction, (i) the
numerator of which is 4,500,000 minus the number of Units purchased by the Underwriters upon the exercise of their option to purchase
additional Units and (ii) the denominator of which is 4,500,000. All references in this Letter Agreement to Founder Shares of the
Company being forfeited shall take effect as a contribution of such Founder Shares to the Company’s capital as a matter of Delaware
law. The forfeiture will be adjusted to the extent that the option to purchase additional Units is not exercised in full by the Underwriters
so that the number of Founder Shares will equal an aggregate of 20.0% of the Company’s issued and outstanding Shares after the Public
Offering. The Initial Stockholders further agree that to the extent that the size of the Public Offering is increased or decreased, the
Company will effect a capitalization or stock repurchase or redemption, as applicable, immediately prior to the consummation of the Public
Offering in such amount as to maintain the number of Founder Shares at 20.0% of the Company’s issued and outstanding Shares upon
the consummation of the Public Offering.


 






     


     


    

 


(b) If, in connection with the closing of
a Business Combination, the Sponsor agrees to forfeit any Founder Shares, Private Placement Warrants or Sponsor Loan Warrants (or any
shares of Class A Common Stock underlying the Private Placement Warrants or Sponsor Loan Warrants) to the Company at no cost or subject
its Founder Shares, Sponsor Loan Warrants or Private Placement Warrants (or any shares of Class A Common Stock underlying the Private
Placement Warrants or Sponsor Loan Warrants) to contractual terms or restrictions, convert its Founder Shares into other securities or
contractual rights or otherwise modify the terms of its Founder Shares, Private Placement Warrants or Sponsor Loan Warrants(each a “Sponsor
Modification”), then Cowen Investments agrees to forfeit, subject, convert or modify its Founder Shares, Private Placement
Warrants or Sponsor Loan Warrants (or any shares of Class A Common Stock underlying the Private Placement Warrants or Sponsor Loan
Warrants) on a pro rata basis and on the same terms as the Sponsor, and hereby grants to the Company and any representative designated
by the Company without further action by Cowen Investments a limited irrevocable power of attorney to effect such forfeiture or Sponsor
Modification on behalf of Cowen Investments, which power of attorney shall be deemed to be coupled with an interest.


 


6. The Sponsor, Cowen Investments and each Insider
hereby agree and acknowledge that: (i) the Underwriters and the Company would be irreparably injured in the event of a breach by
such Sponsor, Cowen Investments or Insider of its, his or her obligations under paragraphs 1, 2, 3, 4, 5, 7(a) and 7(b) of this
Letter Agreement (ii) monetary damages may not be an adequate remedy for such breach and (iii) the non-breaching party shall
be entitled to seek injunctive relief, in addition to any other remedy that such party may have in law or in equity, in the event of such
breach.


 


7. (a) The Sponsor, Cowen Investments and
each Insider agree that it, he or she shall not Transfer (as defined below) any Founder Shares (or shares of Class A Common Stock
issuable upon conversion thereof) until the earlier of (A) one year after the completion of the Company’s initial Business
Combination and (B) subsequent to the Business Combination, (x) the date on which the Company completes a liquidation, merger,
stock exchange, reorganization or other similar transaction that results in all of the Public Stockholders having the right to exchange
their shares of Class A Common Stock for cash, securities or other property or (y) if the last reported sale price of the Class A
Common Stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and
the like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the Company’s initial Business
Combination (the “Founder Shares Lock-Up Period”).


 


(b) The Sponsor, Cowen Investments and each
Insider agree that it, he or she shall not Transfer any Private Placement Warrants or Sponsor Loan Warrants, or any shares of Class A
Common Stock issued or issuable upon the conversion or exercise of the Private Placement Warrants or Sponsor Loan Warrants, until 30 days
after the completion of a Business Combination.


 


(c) Notwithstanding the provisions set
forth in paragraphs 7(a) and (b), Transfers of the Founder Shares, Private Placement Warrants, Sponsor Loan Warrants and shares
of Class A Common Stock issued or issuable upon the exercise or conversion of the Private Placement Warrants or Sponsor Loan
Warrants or the Founder Shares and that are held by the Sponsor, Cowen Investments or any Insider or any of their permitted
transferees (that have complied with this paragraph 7(c)), are permitted (a) to the Company’s officers or directors, any
affiliates or family members of any of the Company’s officers or directors, any members of the Holders, or any affiliates of
the Holders, (b) in the case of an individual, by gift to a member of the individual’s immediate family or to a trust,
the beneficiary of which is a member of the individual’s immediate family or an affiliate of such person, or to a charitable
organization; (c) in the case of an individual, by virtue of laws of descent and distribution upon death of the individual;
(d) in the case of an individual, pursuant to a qualified domestic relations order; (e) by private sales or transfers made
in connection with the consummation of the Company’s Business Combination at prices no greater than the price at which the
securities were originally purchased; (f) in the event of the Company’s liquidation prior to the Company’s
completion of an initial Business Combination; (g) by virtue of the laws of the State of Delaware or the Sponsor’s
limited liability company agreement, as amended, upon dissolution of the Sponsor; or (h) in the event of the Company’s
completion of a liquidation, merger, stock exchange, reorganization or other similar transaction which results in all of the Public
Stockholders having the right to exchange their Class A Common Stock for cash, securities or other property subsequent to the
Company’s completion of an initial Business Combination; provided, however, that in the case of clauses
(a) through (e), these permitted transferees must enter into a written agreement with the Company agreeing to be bound by the
transfer restrictions and other applicable restrictions in this Letter Agreement.


 






     


     


    

 


8. The Sponsor, Cowen Investments and each Insider
represent and warrant that it, he or she has never been suspended or expelled from membership in any securities or commodities exchange
or association or had a securities or commodities license or registration denied, suspended or revoked. Each Insider’s biographical
information furnished to the Company, if any (including any such information included in the Prospectus), is true and accurate in all
respects and does not omit any material information with respect to such Insider’s background. The Sponsor, Cowen Investments and
each Insider’s questionnaire furnished to the Company, if any, is true and accurate in all respects. The Sponsor, Cowen Investments
and each Insider represent and warrant that: it is not subject to or a respondent in any legal action for, any injunction, cease-and-desist
order or order or stipulation to desist or refrain from any act or practice relating to the offering of securities in any jurisdiction;
it has never been convicted of, or pleaded guilty to, any crime (i) involving fraud, (ii) relating to any financial transaction
or handling of funds of another person, or (iii) pertaining to any dealings in any securities and it is not currently a defendant
in any such criminal proceeding.


 


9. Except as disclosed in, or as expressly contemplated
by, the Prospectus, neither the Sponsor, Cowen Investments nor any Insider nor any affiliate of the Sponsor, Cowen Investments or any
Insider, nor any director or officer of the Company, shall receive from the Company any finder’s fee, reimbursement, consulting
fee, monies in respect of any repayment of a loan or other compensation prior to, or in connection with any services rendered in order
to effectuate the consummation of the Company’s initial Business Combination (regardless of the type of transaction that it is).


 


10. The Sponsor, Cowen Investments and each Insider
have full right and power, without violating any agreement to which it is bound (including, without limitation, any non-competition or
non-solicitation agreement with any employer or former employer), to enter into this Letter Agreement and, as applicable, to serve as
an officer and/or a director on the board of directors of the Company and hereby consents to being named in the Prospectus as an officer
and/or a director of the Company.


 


11. As used herein,
(i) “Business Combination” shall mean a merger, capital stock exchange, asset acquisition, stock
purchase, reorganization or similar business combination, involving the Company and one or more businesses;
(ii) “Shares” shall mean, collectively, the Class A Common Stock, the Founder Shares and
Class A Common Stock underlying the Private Placement Warrants and Sponsor Loan Warrants; (iii) “Founder
Shares” shall mean the 8,625,000 shares of Class B common stock, par value $0.0001 per share, issued and
outstanding immediately prior to the consummation of the Public Offering (up to 1,125,000 shares of which are subject to complete or
partial forfeiture by the Holders to the extent the over-allotment option is not exercised by the Underwriters);
(iv) “Initial Stockholders” shall mean the Sponsor, Cowen Investments and any Insider that holds
Founder Shares; (v) “Private Placement Warrants” shall mean the 8,500,000 warrants of the Company (or
9,400,000 warrants if the over-allotment option is exercised in full) that the Holders have agreed to purchase for an aggregate
purchase price of $8,500,000 in the aggregate (or $9,400,000 if the over-allotment option is exercised in full), or $1.00 per
warrant, in a private placement that shall occur substantially concurrently with the consummation of the Public Offering;
(vii) “Public Stockholders” shall mean the holders of securities issued in the Public Offering;
(viii) “Sponsor Loan Warrants” shall mean the warrants that may be issued to the Sponsor and Cowen
Investments upon conversion of the sponsor loan (as such term is defined in the Prospectus) or to the Sponsor or any of its
affiliates or designees upon conversion of any extension loan the Sponsor or its affiliates or designees may make to the Company if
the Company extends the period of time it has to complete a Business Combination, as described in the Prospectus;
(ix) “Trust Account” shall mean the trust fund into which a portion of the net proceeds of the Public
Offering shall be deposited; and (x) “Transfer” shall mean the (a) sale or assignment of, offer
to sell, contract or agreement to sell, hypothecate, pledge, grant of any option to purchase or otherwise dispose of or agreement to
dispose of, directly or indirectly, or establishment or increase of a put equivalent position or liquidation with respect to or
decrease of a call equivalent position within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, and
the rules and regulations of the Commission promulgated thereunder with respect to, any security, (b) entry into any swap
or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any security,
whether any such transaction is to be settled by delivery of such securities, in cash or otherwise, or (c) public announcement
of any intention to effect any transaction specified in clause (a) or (b) herein.


 






     


     


    

 


12. This Letter Agreement constitutes the entire
agreement and understanding of the parties hereto in respect of the subject matter hereof and supersedes all prior understandings, agreements,
or representations by or among the parties hereto, written or oral, to the extent they relate in any way to the subject matter hereof
or the transactions contemplated hereby. This Letter Agreement may not be changed, amended, modified or waived (other than to correct
a typographical error) as to any particular provision, except by a written instrument executed by (1) each Insider and each Holder
that is the subject of any such change, amendment modification or waiver and (2) the Company.


 


13. No party hereto may assign either this Letter
Agreement or any of its rights, interests, or obligations hereunder without the prior written consent of the other parties. Any purported
assignment in violation of this paragraph shall be void and ineffectual and shall not operate to transfer or assign any interest or title
to the purported assignee. This Letter Agreement shall be binding on the Sponsor, Cowen Investments and each Insider and their respective
successors, heirs and assigns and permitted transferees.


 


14. Nothing in this Letter Agreement shall be construed
to confer upon, or give to, any person or corporation other than the parties hereto any right, remedy or claim under or by reason of this
Letter Agreement or of any covenant, condition, stipulation, promise or agreement hereof. All covenants, conditions, stipulations, promises
and agreements contained in this Letter Agreement shall be for the sole and exclusive benefit of the parties hereto and their successors,
heirs, personal representatives and assigns and permitted transferees; provided, however, that the Underwriters shall benefit
from the provisions set forth in paragraph 3, which such paragraphs shall not be amended or modified without the written consent of the
Representatives.


 


15. This Letter Agreement may be executed in any
number of original or facsimile counterparts and each of such counterparts shall for all purposes be deemed to be an original, and all
such counterparts shall together constitute but one and the same instrument. Counterparts may be delivered via facsimile, electronic mail
(including any electronic signature covered by the U.S. federal ESIGN Act of 2000, Uniform Electronic Transactions Act, the Electronic
Signatures and Records Act or other applicable law, e.g., www.docusign.com) or other transmission method and any counterpart so delivered
shall be deemed to have been duly and validly delivered and be valid and effective for all purposes


 


16. This Letter Agreement shall be deemed severable,
and the invalidity or unenforceability of any term or provision hereof shall not affect the validity or enforceability of this Letter
Agreement or of any other term or provision hereof. Furthermore, in lieu of any such invalid or unenforceable term or provision, the parties
hereto intend that there shall be added as a part of this Letter Agreement a provision as similar in terms to such invalid or unenforceable
provision as may be possible and be valid and enforceable.


 


17. This Letter Agreement shall be governed
by and construed and enforced in accordance with the laws of the State of New York. The parties hereto (i) all agree that any
action, proceeding, claim or dispute arising out of, or relating in any way to, this Letter Agreement shall be brought and enforced
in the courts of New York City, in the State of New York, and irrevocably submit to such jurisdiction and venue, which jurisdiction
and venue shall be exclusive and (ii) waive any objection to such exclusive jurisdiction and venue or that such courts
represent an inconvenient forum.


 






     


     


    

 


18. Any notice, consent or request to be given
in connection with any of the terms or provisions of this Letter Agreement shall be in writing and shall be sent by express mail or similar
private courier service, by certified mail (return receipt requested), by hand delivery or facsimile or other electronic transmission.


 


19. Each party hereto shall not be liable for any
breaches or misrepresentations contained in this Letter Agreement by any other party to this Letter Agreement, and no party shall be liable
or responsible for the obligations of another party, including, without limitation, indemnification obligations and notice obligations.


 


20. This Letter Agreement shall terminate on the
earlier of (i) the expiration of the Founder Shares Lock-Up Period and (ii) the liquidation of the Company; provided,
however, that this Letter Agreement shall earlier terminate in the event that the Public Offering is not consummated and closed
by December 31, 2021; provided  further that paragraph 4 of this Letter Agreement shall survive such liquidation.


  


[Signature page follows]


 






     


     


    

 


	 	Sincerely,
	 	 	 
	 	Concord Sponsor Group III LLC
	 	 	 
	 	By:	/s/
Timothy Kacani
	 	 	Name: 	Timothy Kacani
	 	 	Title: 	Authorized Signatory 
	 	 	 
	 	CA2 Co-Investment LLC
	 	 	 
	 	By:	/s/
Owen Littman
	 	 	Name:	 Owen Littman
	 	 	Title: 	Authorized Person 


 


	 	/s/ Jeff Tuder
	 	Jeff Tuder
	 	 
	 	/s/ Michele Cito
	 	Michele Cito
	 	 
	 	/s/ Bob Diamond
	 	Bob Diamond
	 	 
	 	/s/ Peter Ort
	 	Peter Ort
	 	 
	 	/s/ Thomas King
	 	Thomas King
	 	 
	 	/s/ Larry Leibowitz
	 	Larry Leibowitz



 


 



     


     


    

 


	Acknowledged and Agreed: 	 
	 	 	 
	Concord Acquisition Corp III	 
	 	 	 
	By:	/s/ Jeff Tuder	 
	Name:  	Jeff Tuder	 
	Title:	Chief Executive Officer