Exhibit 10.1

EXECUTION VERSION

January 6, 2022

C5 ACQUISITION CORPORATION

1701 Pennsylvania Ave NW

Ste #460

Washington, D.C. 20006

Re: Initial Public Offering

Ladies and Gentlemen:

This letter (this “Letter Agreement”) is being delivered to you in accordance with that certain underwriting agreement (the “Underwriting Agreement”) entered into or proposed to be entered into by and between C5 Acquisition Corporation, a Delaware corporation (the “Company”), and Cantor Fitzgerald & Co. and Moelis & Company LLC, as underwriters (the “Underwriters” ), relating to an underwritten initial public offering (the “Public Offering”), of 28,750,000 of the Company’s units (including up to 3,750,000 units that may be purchased to cover the Underwriter’s option to purchase additional units, if any) (the “Units”), each comprised of one share of Class A common stock, par value $0.0001 per share, of the Company (“Class A Common Stock”), and one-half of one redeemable public warrant (each whole public warrant, a “Public Warrant”). Each Public 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, as described in the Prospectus (as defined below). The Units will be sold in the Public Offering pursuant to a registration statement on Form S-1 and a prospectus (the “Prospectus”) filed by the Company with the U.S. Securities and Exchange Commission (the “Commission”) and the Company has applied to have the Units listed on the New York Stock Exchange. Certain capitalized terms used herein are defined in Section 11.

In order to induce the Company and the Underwriter 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, C5 Sponsor LLC, a Delaware limited liability company (the “Sponsor”), 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 and each Insider agrees 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 of Capital Stock owned by it, him or her in favor of such proposed Business Combination (including any proposals recommended by the Company’s board of directors in connection with such proposed Business Combination) and (ii) not redeem any shares of Capital Stock 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 and each Insider agrees that it, he or she will not sell or tender any shares of Capital Stock owned by it, him or her to the Company in connection therewith.

2.     The Sponsor and each Insider hereby agrees that, in the event that the Company fails to consummate a Business Combination before the later of (i) fifteen (15) months from the

closing of the Public Offering, and (ii) such later date as may be approved by the Company’s stockholders in accordance with the Company’s amended and restated certificate of incorporation (as further amended, supplemented or otherwise modified from time to time, the “Certificate of Incorporation”) (the “Completion Window”), the Sponsor 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 ten (10) business days thereafter, subject to lawfully available funds therefor, redeem one-hundred percent (100%) of the 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 (which interest shall be net of taxes payable (“Permitted Withdrawals”) and less up to $100,000 of interest to pay dissolution expenses), divided by the number of the then outstanding Offering Shares, which redemption will completely extinguish all of the Public Stockholders’ rights as stockholders (including the right to receive further liquidating distributions, if any), subject to applicable law, 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 any other requirements of applicable law. The Sponsor and each Insider agrees to not propose any amendment to the 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 one-hundred percent (100%) of the Offering Shares if the Company does not complete its initial Business Combination within the Completion Window or (B) with respect to any other material provision relating to stockholders’ rights or pre-initial Business Combination activity, unless the Company provides the 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 (which interest shall be net of Permitted Withdrawals), divided by the number of the then outstanding Offering Shares.

The Sponsor and each Insider acknowledges that it, he or she has no right, title, interest or claim of any kind in or to any monies or any other asset held in the Trust Account as a result of any liquidation of the Company with respect to the Founder Shares held by it, him or her. The Sponsor and each Insider hereby further waives, with respect to any shares of Capital Stock held by it, him or her, if any, any redemption rights it, he or she may have in connection with (x) 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 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 one-hundred percent (100%) of the Offering Shares if the Company has not consummated its initial Business Combination within the Completion Window or (B) with respect to any other material provision relating to stockholders’ rights or pre-initial Business Combination activity (although the Sponsor and each Insider shall be entitled to redemption and liquidation rights with respect to any Offering Shares it, he or she holds if the Company fails to consummate a Business Combination within the Completion Window).

3.     Notwithstanding the provisions set forth in Sections 7(a) and (b), during the period commencing on the effective date of the Underwriting Agreement and ending one-hundred-eighty

(180) days after such date, the Sponsor and each Insider shall not, without the prior written consent of the Underwriter, (i) offer, sell, contract to sell, pledge or grant any option to purchase or otherwise dispose of (or enter into any transaction that is designed to, or might reasonably be expected to, result in the disposition (whether by actual disposition or effective economic disposition due to cash settlement or otherwise)), directly or indirectly, or establish or increase a put equivalent position or liquidate or decrease 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 (the “Exchange Act”), with respect to any Units, shares of Class A Common Stock, Public Warrants or any securities convertible into, or exercisable or exchangeable for, shares of Class A Common Stock, (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any Units, shares of Class A Common Stock, Public Warrants or any securities convertible into, or exercisable or exchangeable for, shares of Class A Common Stock owned by it, him or her, whether any such transaction is to be settled by delivery of such securities, in cash or otherwise, or (iii) or publicly announce an intention to effect any such transaction specified in clause (i) or (ii); provided, however, that the foregoing does not apply to the forfeiture of any Founder Shares pursuant to their terms or any transfer of any Founder Shares to any current or future independent director or advisor of the Company (as long as such current or future independent director or advisor transferee is subject to this Letter Agreement or executes an agreement substantially identical to the terms of this Letter Agreement, as applicable to directors, officers and advisors at the time of such transfer and as long as, to the extent any reporting obligation pursuant to Section 16 of the Exchange Act is triggered as a result of such transfer, any related filing includes a practical explanation as to the nature of the transfer). The Sponsor and each Insider acknowledge and agree that, prior to the effective date of any release or waiver of the restrictions set forth in this Section 3 or 7, the Company shall announce the impending release or waiver by press release through a major news service at least two (2) business days before the effective date of the release or waiver. Any such release or waiver granted shall only be effective two (2) business days after the publication date of such press release. The provisions of this Section 3 shall 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 holder of limited liability company interests or any member or manager of the Sponsor or any other Insider) agrees to indemnify and hold harmless the Company against any and all loss, liability, claim, damage and expense whatsoever (including, without limitation, 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 an agreement for a Business Combination (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) $10.10 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 Permitted Withdrawals, except as to any claims by a third party which 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 Underwriter 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 fifteen (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. For the avoidance of doubt, none of the Company’s officers, directors or advisors shall indemnify the Company for claims by third parties, including, without limitation, claims by vendors or any Target.

5.     To the extent that the Underwriter does not exercise its over-allotment option to purchase up to an additional 3,750,000 Units within forty-five (45) days from the date of the Prospectus (and as further described in the Prospectus), the Sponsor agrees that it shall forfeit, at no cost, an aggregate number of the Founder Shares in the aggregate equal to the product of (a) 937,500 multiplied by a fraction, (i) the numerator of which is 3,750,000 minus the number of Units purchased by the Underwriter upon the exercise of its option to purchase additional Units, and (ii) the denominator of which is 3,750,000. All references in this Letter Agreement to any 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 over-allotment option is not exercised in full by the Underwriter so that the number of the Founder Shares will equal an aggregate of twenty percent (20.0%) of the Company’s issued and outstanding shares of Capital Stock following the Public Offering. The Sponsor and each Insider further agree that, to the extent that the size of the Public Offering is increased or decreased, the Company will effect a capitalization, stock repurchase or redemption or stock split, reverse stock split or other appropriate mechanism, as applicable, immediately prior to the consummation of the Public Offering in such amount as to maintain the number of the Founder Shares at twenty percent (20.0%) of the Company’s issued and outstanding shares of Capital Stock following the Public Offering. In connection with such increase or decrease in the size of the Public Offering, then (A) the references to 3,750,000 in the numerator and denominator of the formula set forth in the first sentence of this Section 5 shall be changed to a number equal to fifteen percent (15.0%) of the number of shares of Class A Common Stock included in the Units issued in the Public Offering and (B) the reference to 937,500 in the formula set forth in the first sentence of this Section 5 shall be adjusted to such number of the Founder Shares that the Sponsor would have to return to the Company in order for the number of the Founder Shares to equal an aggregate of twenty percent (20.0%) of the Company’s issued and outstanding shares of Capital Stock following the Public Offering.

6.     The Sponsor and each Insider hereby agree and acknowledge that (i) the Underwriter and the Company would be irreparably injured in the event of a breach by the Sponsor or such Insider of its, his or her obligations under Sections 1, 2, 3, 4, 5, 7(a), 7(b) and 9, as applicable, 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) Subject to the exceptions set forth in this Letter Agreement, the Sponsor 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 (1) year after the date of the completion of the Company’s initial Business Combination and (B) subsequent to the completion of the Business Combination, (x) the date on which 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 twenty (20) trading days within any thirty (30)-trading day period commencing at least one-hundred-fifty (150) days after the date of the completion of the Company’s initial Business Combination or (y) 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 (the “Founder Shares Lock-Up Period”).

(b)     Subject to the exceptions set forth in this Letter Agreement, the Sponsor and each Insider agree that it, he or she shall not Transfer any Private Placement Warrants or Working Capital Warrants (as defined below) (or shares of Class A Common Stock issued or issuable upon the conversion or exercise of the Private Placement Warrants or Working Capital Warrants, as the case may be) until thirty (30) days after the date of the completion of the Company’s initial Business Combination (the “Private Placement Warrants Lock-Up Period” and, together with the Founder Shares Lock-Up Period, the “Lock-Up Periods”).

(c)     Notwithstanding the provisions set forth in Sections 3, 7(a) and (b), Transfers of the Founder Shares, Private Placement Warrants, Working Capital Warrants and shares of Class A Common Stock issued or issuable upon the exercise or conversion of the Private Placement Warrants, the Working Capital Warrants or the Founder Shares and that are held by the Sponsor or any Insider or any of their respective permitted transferees (that have complied with this Section 7(c)) are permitted (a) to the Company’s officers, directors or advisors, any Affiliates or family members of any of the Company’s officers, directors or advisors, any direct or indirect members, partners or stockholders of the Sponsor or any employee or partner of any such member, partner or stockholder, or any Affiliates of the Sponsor, (b) in the case of an individual, transfers by gift to a member of the individual’s immediate family, to a trust, the beneficiaries of which are one or more of the individual’s immediate family or an Affiliate of such person, or to a charitable organization, (c) in the case of an individual, transfers by virtue of laws of descent and distribution upon death of such individual, (d) in the case of an individual, transfers pursuant to a qualified domestic relations order, (e) transfers by virtue of law or the Sponsor’s operating agreement upon dissolution of a person other than an individual, (f) transfers by private transfers or sales and transfers made in connection with the consummation of the Company’s initial Business Combination at prices no greater than the price at which the securities were originally purchased, (g) to an entity that is an Affiliate of such holder, (h) transfers in the event of the Company’s liquidation prior to the completion of the Company’s initial Business Combination, (i) to the Company for no

value for cancellation in connection with the consummation of the Company’s initial Business Combination, (j) 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 Company’s stockholders having the right to exchange their shares of Class A Common Stock for cash, securities or other property subsequent to the completion of the Company’s initial Business Combination, and (k) to a nominee or custodian of a person or entity to whom a disposition or transfer would be permissible under clauses (a) through (h) above; provided, however, that, in the case of clauses (a) through (f) and (j), these transferees must enter into a written agreement with the Company agreeing to be bound by the transfer restrictions in this Letter Agreement. “Affiliate” means, with respect to any holder any other person who, directly or indirectly (including through one or more intermediaries), controls, is controlled by, or is under common control with, such person. For purposes of this definition, “control,” when used with respect to any specified person, shall mean the power, direct or indirect, to direct or cause the direction of the management and policies of such person, whether through ownership of voting securities or partnership or other ownership interests, by contract or otherwise, and the terms “controlling” and “controlled” shall have correlative meanings.

8.     The Sponsor and each Insider represent and warrant with respect to such Insider 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 represents and warrants with respect to such Insider that such 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 and each Insider’s questionnaires furnished to the Company, if any, are true and accurate in all respects. The Sponsor and each Insider represent and warrant with respect to such Insider that it, he or she (a) 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, (b) 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 (c) 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 nor any Insider nor any affiliate of the Sponsor or any Insider, nor any director, officer or advisor 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), other than the following, none of which will be made from the proceeds held in the Trust Account prior to the completion of the Company’s initial Business Combination: (i) repayment of a loan and advances of up to $300,000 made to the Company by the Sponsor to cover expenses related to the organization of the Company and the Public Offering; (ii) reimbursement for any reasonable out-of-pocket expenses related to identifying, investigating and consummating an initial Business Combination; and (iii) repayment of loans, if any, and on such terms as to be determined by the Company from time to time, made by the Sponsor, an affiliate of the Sponsor or certain of the

Company’s officers and directors to finance transaction costs in connection with the Company’s initial Business Combination; provided, however, that, if the Company does not consummate an initial Business Combination, a portion of the working capital held outside the Trust Account may be used by the Company to repay such loaned amounts so long as no proceeds from the Trust Account are used for such repayment. Up to $2,000,000 of such loans may be convertible into warrants (the “Working Capital Warrants”) of the post Business Combination entity at a price of $1.00 per warrant at the option of the lender. Such warrants would be identical to the Private Placement Warrants, including as to the exercise price, exercisability and exercise period.

10.     The Sponsor and each Insider has full right and power, without violating any agreement by 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, a director on the board of directors and/or an advisor on the board of advisors of the Company and hereby consents to being named in the Prospectus as an officer, a director and/or an advisor of the Company.

11.     As used herein, (i) “Business Combination” shall mean a merger, consolidation, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination, involving the Company and one or more businesses or entities; (ii) “Capital Stock” shall mean, collectively, the Class A Common Stock and the Founder Shares; (iii) “Founder Shares” shall mean the 7,187,500 shares of Class B common stock, par value $0.0001 per share, issued and outstanding immediately prior to the consummation of the Public Offering; (iv) “Private Placement Warrants” shall mean the warrants to purchase up to an aggregate of 13,535,500 shares of Class A Common Stock (or up to 15,035,500 shares of Class A Common Stock, depending on the extent to which the underwriters exercise their option to purchase additional units) of the Company that the Sponsor has agreed to purchase for an aggregate purchase price of $13,535,500 (or up to $15,035,500, depending on the extent to which the underwriters exercise their option to purchase additional units), or $1.00 per Private Placement Warrant, in a private placement transaction that shall occur simultaneously with the consummation of the Public Offering; (v) “Public Stockholders” shall mean the holders of securities issued in the Public Offering; (vi) “Trust Account” shall mean the trust fund into which a portion of the net proceeds of the Public Offering and the sale of the Private Placement Warrants shall be deposited; and (vii) “Transfer” shall mean the (a) sale or assignment of, offer to sell, contract or agreement to sell, hypothecate or 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 the Exchange Act 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) above.

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 that is the subject of any such change, amendment modification or waiver and (2) the Sponsor.

13.     Except as otherwise provided in this Letter Agreement, 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 Section 13 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 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 entity 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.

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.

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.     For ease of administration, this Letter Agreement is being executed so as to enable each Insider identified on the signature pages to enter into this Letter Agreement, severally, but not jointly. The Company and each Insider agree with each other that (i) this Letter Agreement shall be treated as if it were a separate agreement with respect to each Insider listed on the signature page, as if each Insider had executed a separate registration rights agreement naming only itself as an Insider, and (ii) no Insider listed on the signature page shall have any liability under this Letter Agreement for the obligations of any other Insider so listed. The decision of each Insider to enter into this Letter Agreement has been made by such Insider independently of any other Insider. Nothing contained herein, and no action taken by an Insider pursuant hereto or thereto, shall be deemed to constitute any Insider acting with any other Insider or Insiders as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that any Insider and any other Insider or Insiders are in any way acting in concert or as a group with respect to such obligations or the transactions contemplated by this Letter Agreement.

18.    This Letter Agreement shall be governed by and construed and enforced in accordance with the laws of the State of New York, without giving effect to conflicts of law principles that would result in the application of the substantive laws of another jurisdiction. 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.

19.     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.

20.     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 (including, for the avoidance of doubt, any Insider with respect to any other Insider), and no party shall be liable or responsible for the obligations of another party, including, without limitation, indemnification obligations and notice obligations.

21.     This Letter Agreement shall terminate on the earlier of (i) the expiration of the Lock-Up Periods and (ii) the liquidation of the Company; provided, however, that this Letter Agreement shall terminate earlier in the event that the Public Offering is not consummated and closed by December 31, 2022; provided, further, that Section 4 shall survive such liquidation.

[Signature Pages Follow]

[Signature Page to Letter Agreement—C5 Acquisition Corporation]

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Exhibit 10.2

EXECUTION VERSION

INVESTMENT MANAGEMENT TRUST AGREEMENT

THIS INVESTMENT MANAGEMENT TRUST AGREEMENT is made effective as of January 6, 2022 (as amended, supplemented or otherwise modified from time to time, this “Agreement”), by and between C5 Acquisition Corporation, a Delaware corporation (the “Company”), and Continental Stock Transfer & Trust Company, a New York limited purpose trust company (the “Trustee”).

WHEREAS, the Company’s registration statement on Form S-1, File No. 333-261249 (the “Registration Statement”) and prospectus (the “Prospectus”) for the initial public offering of the Company’s units (the “Units”), each of which consists of one share of the Company’s Class A common stock, par value $0.0001 per share (the “Common Stock”), and one-half of one redeemable Public Warrant (as defined in the Underwriting Agreement (as defined below)), each whole Public Warrant entitling the holder thereof to purchase one share of Common Stock (such initial public offering, the “Offering”), has been declared effective as of the date hereof by the U.S. Securities and Exchange Commission;

WHEREAS, the Company has entered into that certain underwriting agreement, dated the date hereof (as amended, supplemented or otherwise modified from time to time, the “Underwriting Agreement”), with Cantor Fitzgerald & Co. and Moelis & Company LLC, as the underwriters (the “Underwriters”);

WHEREAS, as described in the Registration Statement, an aggregate of $255,000,000 from the gross proceeds of the Offering and sale of the Private Placement Warrants (as defined in the Underwriting Agreement) (or $293,250,000 if the Underwriter’s over-allotment option is exercised in full) will be delivered to the Trustee to be deposited and held in a segregated trust account located at all times in the United States (the “Trust Account”) for the benefit of the Company and the holders of the Common Stock included in the Units issued in the Offering as hereinafter provided (the amount to be delivered to the Trustee on the date hereof and any additional amount subsequently delivered to the Trustee for deposit into the Trust Account (and any interest earned on such amounts) is referred to as the “Property,” the stockholders for whose benefit the Trustee shall hold the Property are referred to as the “Public Stockholders,” and the Public Stockholders and the Company are referred to together as the “Beneficiaries”);

WHEREAS, pursuant to the Underwriting Agreement, a portion of the Property equal to $8,750,000, or $10,062,500 if the Underwriter’s over-allotment option is exercised in full, is attributable to deferred underwriting discounts and commissions that will be payable by the Company to the Underwriter upon, and concurrently with, the consummation of the Business Combination (as defined below) (the “Deferred Discount”); and

WHEREAS, the Company and the Trustee desire to enter into this Agreement to set forth the terms and conditions pursuant to which the Trustee shall hold the Property.

NOW THEREFORE, IT IS AGREED:

1.    Agreements and Covenants of Trustee. The Trustee hereby agrees and covenants to:

(a)    Hold the Property in trust for the Beneficiaries in accordance with the terms of this Agreement in the Trust Account established by the Trustee in the United States at JPMorgan Chase Bank, N.A. (or at another U.S.-chartered commercial bank with consolidated assets of $100.0 billion or more) and at a brokerage institution selected by the Trustee that is reasonably satisfactory to the Company;

(b)    Manage, supervise and administer the Trust Account subject to the terms and conditions set forth herein;

(c)    In a timely manner, upon the written instruction of the Company, invest and reinvest the Property in solely U.S. government securities within the meaning of Section 2(a)(16) of the Investment Company Act of 1940, as amended, having a maturity of one-hundred-eighty-five (185) days or less, or in money market funds meeting the conditions of paragraphs (d)(1), (d)(2), (d)(3) and (d)(4) of Rule 2a-7 promulgated under the Investment Company Act of 1940, as amended (or any successor rule), which invest only in direct U.S. government treasury obligations, as determined by the Company, and the Trustee may not invest in any other securities or assets, it being understood that the Trust Account will earn no interest while account funds are uninvested awaiting the Company’s instructions hereunder; and while account funds are invested or uninvested the Trustee may earn bank credits or other consideration;

(d)    Collect and receive, when due, all interest or other income arising from the Property, which shall become part of the “Property,” as such term is used herein;

(e)    Promptly notify the Company and the Underwriter of all communications received by the Trustee with respect to the Property requiring action by the Company;

(f)    Supply any necessary information or documents as may be requested by the Company (or its authorized agents) in connection with the Company’s preparation of the tax returns relating to assets held in the Trust Account or in connection with the preparation or completion of the audit of the Company’s financial statements by the Company’s independent registered public accounting firm;

(g)    Participate in any plan or proceeding for protecting or enforcing any right or interest arising from the Property if, as and when instructed by the Company to do so;

(h)    Render to the Company monthly written statements of the activities of, and amounts in, the Trust Account reflecting all receipts and disbursements of the Trust Account;

(i)    Commence liquidation of the Trust Account only after and promptly after (x) receipt of, and only in accordance with, the terms of a letter from the Company (the “Termination Letter”) in a form substantially similar to that attached hereto as either Exhibit A or

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Exhibit B, as applicable, signed on behalf of the Company by the Chief Executive Officer, President, Chief Financial Officer, Treasurer, Secretary or chairman of the board of directors of the Company (the “Board”) or another authorized officer of the Company and, in the case of Exhibit A, acknowledged and agreed to by the Underwriter and complete the liquidation of the Trust Account and distribute the Property in the Trust Account, including interest earned on the funds held in the Trust Account (net of amounts withdrawn in accordance with this Agreement and less up to $100,000 of interest that may be released to the Company to pay dissolution expenses), only as directed in the Termination Letter and the other documents referred to therein, or (y) upon the date which is the later of (i) fifteen (15) months after the closing of the Offering, and (ii) such later date as may be approved by the Company’s stockholders in accordance with the Company’s amended and restated certificate of incorporation (as further amended supplemented or otherwise modified from time to time, the “Certificate of Incorporation”), if the Termination Letter has not been received by the Trustee prior to such date, in which case the Trust Account shall be liquidated in accordance with the procedures set forth in the Termination Letter attached hereto as Exhibit B and the Property in the Trust Account, including interest earned on the funds held in the Trust Account (net of amounts withdrawn in accordance with this Agreement and less up to $100,000 of interest that may be released to the Company to pay dissolution expenses) shall be distributed to the Public Stockholders of record as of such date;

(j)    Upon written request from the Company, which may be given from time to time in a form substantially similar to that attached hereto as Exhibit C (a “Tax Payment Withdrawal Instruction”), withdraw from the Trust Account and distribute to the Company the amount of interest earned on the Property requested by the Company to cover any tax obligation owed by the Company as a result of assets of the Company or interest or other income earned on the Property, which amount shall be delivered directly to the Company, and the Company shall forward such amount to the relevant taxing authority; provided, however, that, to the extent there is not sufficient cash in the Trust Account to pay such tax obligation, the Trustee shall liquidate such assets held in the Trust Account as shall be designated by the Company in writing to make such distribution, so long as there is no reduction in the principal amount per share initially deposited in the Trust Account; provided, further, that, if the tax to be paid is a franchise tax, the written request by the Company to make such distribution shall be accompanied by a copy of the franchise tax bill from the relevant taxing authority for the Company. The written request of the Company referenced above shall constitute presumptive evidence that the Company is entitled to such funds, and the Trustee shall have no responsibility to look beyond such request;

(k)    [Reserved];

(l)    Upon written request from the Company, which may be given from time to time in a form substantially similar to that attached hereto as Exhibit D (a “Stockholder Redemption Withdrawal Instruction”), the Trustee shall distribute to the Public Stockholders on behalf of the Company the amount requested by the Company to be used to redeem shares of the Common Stock from the Public Stockholders properly submitted in connection with a stockholder vote to approve an amendment to the Certificate of Incorporation that would affect the substance or timing of the Company’s obligation to redeem one-hundred percent (100%) of its public shares of the Common Stock if the Company has not consummated an initial Business Combination within such time as is described in the Certificate of Incorporation or with respect to any other material provision relating to stockholders’ rights or pre-initial Business Combination activity.

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The written request of the Company referenced above shall constitute presumptive evidence that the Company is entitled to distribute such funds, and the Trustee shall have no responsibility to look beyond such request; and

(m)    Not make any withdrawals or distributions from the Trust Account other than pursuant to Section 1(i), (j) or (l) above.

2.    Agreements and Covenants of the Company. The Company hereby agrees and covenants to:

(a)    Give all instructions to the Trustee hereunder in writing, signed on behalf of the Company by the Chief Executive Officer, President, Chief Financial Officer, Treasurer, Secretary or chairman of the Board. In addition, except with respect to its duties under Sections 1(i), 1(j) and 1(l), the Trustee shall be entitled to rely on, and shall be protected in relying on, any verbal or telephonic advice or instruction which it, in good faith and with reasonable care, believes to be given by any one of the persons authorized above to give written instructions; provided, however, that the Company shall promptly confirm such instructions in writing;

(b)    Subject to Section 4, hold the Trustee harmless and indemnify the Trustee from and against any and all reasonable and documented out-of-pocket expenses, including reasonable outside counsel fees and disbursements, or losses suffered by the Trustee in connection with any action taken by it hereunder and in connection with any action, suit or other proceeding brought against the Trustee involving any claim, or in connection with any claim or demand, which arises out of or relates to this Agreement, the services of the Trustee hereunder, or the Property or any interest earned on the Property, except for expenses and losses resulting from the Trustee’s or its representatives’ gross negligence, fraud or willful misconduct. Promptly after the receipt by the Trustee of notice of demand or claim or the commencement of any action, suit or proceeding, pursuant to which the Trustee intends to seek indemnification under this Section 2(b), it shall notify the Company in writing of such claim (the “Indemnified Claim”). The Trustee shall have the right to conduct and manage the defense against such Indemnified Claim; provided, however, that the Trustee shall obtain the consent of the Company with respect to the selection of counsel; provided, further, that the Company may conduct and manage the defense against any Indemnified Claim if the Trustee does not promptly take reasonable steps to mount such a defense. The Trustee may not agree to settle any Indemnified Claim without the prior written consent of the Company. The Company may participate in any such action with its own counsel;

(c)    Pay the Trustee the fees set forth on Schedule A, including an initial set-up fee, annual administration fee and transaction processing fee, which fees shall be subject to modification by the parties from time to time. It is expressly understood that the Property shall not be used to pay such fees unless and until the property is distributed to the Company pursuant to Sections 1(i). The Company shall pay the Trustee the initial set-up fee and the first annual administration fee at the consummation of the Offering. The Company shall not be responsible for any other fees or charges of the Trustee except as set forth in this Section 2(c), Schedule A and as may be provided in Section 2(b);

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(d)    In connection with any vote of the Company’s stockholders regarding a merger, consolidation, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination of the Company with one or more businesses or entities (the “Business Combination”), provide to the Trustee an affidavit or certificate of the inspector of elections for the stockholder meeting verifying the vote of such stockholders regarding such Business Combination;

(e)    Provide the Underwriter with a copy of any Termination Letter(s) and/or any other correspondence that is sent to the Trustee with respect to any proposed withdrawal from the Trust Account promptly after it issues the same;

(f)    Unless otherwise agreed between the Company and the Underwriter, ensure that any Instruction Letter delivered in connection with a Termination Letter substantially in the form attached hereto as Exhibit A expressly provides that the Deferred Discount is paid directly to the account(s) as directed by the Underwriter prior to any transfer of the funds held in the Trust Account to the Company or any other person;

(g)    Instruct the Trustee to make only those distributions that are permitted under this Agreement and refrain from instructing the Trustee to make any distributions that are not permitted under this Agreement; and

(h)    Within four (4) business days after the Underwriter exercises the over-allotment option (or any unexercised portion thereof) or such over-allotment expires, provide the Trustee with a notice in writing of the total amount of the Deferred Discount, which shall in no event be less than $8,750,000, or $10,062,500 if the Underwriter’s overallotment option is exercised in full.

3.    Limitations of Liability. The Trustee shall have no responsibility or liability to:

(a)    Imply obligations, perform duties, inquire or otherwise be subject to the provisions of any agreement or document other than this Agreement and that which is expressly set forth herein;

(b)    Take any action with respect to the Property, other than as directed in Section 1, and the Trustee shall have no liability to any third party except for liability arising out of the Trustee’s or its representatives’ gross negligence, fraud or willful misconduct;

(c)    Institute any proceeding for the collection of any principal and income arising from, or institute, appear in or defend any proceeding of any kind with respect to, any of the Property unless and until it shall have received instructions from the Company given as provided herein to do so and the Company shall have advanced or guaranteed to it funds sufficient to pay any reasonably incurred expenses incident thereto;

(d)    Refund any depreciation in principal of any Property;

(e)    Assume that the authority of any person designated by the Company to give instructions hereunder shall not be continuing unless provided otherwise in such designation or unless the Company shall have delivered a written revocation of such authority to the Trustee;

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(f)    The other parties hereto or to anyone else for any action taken or omitted by it, or any action suffered by it to be taken or omitted, in good faith and in the Trustee’s best judgment, except for the Trustee’s or its representatives’ gross negligence, fraud or willful misconduct. The Trustee may rely conclusively and shall be protected in acting upon any order, notice, demand, certificate, opinion or advice of counsel (including counsel chosen by the Trustee, which counsel may be the Company’s counsel), statement, instrument, report or other paper or document (not only as to its due execution and the validity and effectiveness of its provisions, but also as to the truth and acceptability of any information therein contained) which the Trustee believes, in good faith and with reasonable care, to be genuine and to be signed or presented by the proper person or persons. The Trustee shall not be bound by any notice or demand, or any waiver, modification, termination or rescission of this Agreement or any of the terms hereof, unless evidenced by a written instrument delivered to the Trustee, signed by the proper party or parties and, if the duties or rights of the Trustee are affected, unless it shall give its prior written consent thereto;

(g)    Verify the accuracy of the information contained in the Registration Statement;

(h)    Provide any assurance that any Business Combination entered into by the Company or any other action taken by the Company is as contemplated by the Registration Statement;

(i)    File information returns with respect to the Trust Account with any local, state or federal taxing authority or provide periodic written statements to the Company documenting the taxes payable by the Company, if any, relating to any interest income earned on the Property;

(j)    Prepare, execute and file tax reports, income or other tax returns and pay any taxes with respect to any income generated by, and activities relating to, the Trust Account, regardless of whether such tax is payable by the Trust Account or the Company, including, without limitation, franchise and income tax obligations, except pursuant to Section 1(j); or

(k)    Verify calculations, qualify or otherwise approve the Company’s written requests for distributions pursuant to Sections 1(i), 1(j) and 1(l).

4.    Trust Account Waiver. The Trustee has no right of set-off or any right, title, interest or claim of any kind (a “Claim”) to, or to any monies in, the Trust Account, and hereby irrevocably waives any Claim to, or to any monies in, the Trust Account that it may have now or in the future. In the event the Trustee has any Claim against the Company under this Agreement, including, without limitation, under Section 2(b) or 2(c), the Trustee shall pursue such Claim solely against the Company and its assets outside the Trust Account and not against the Property or any monies in the Trust Account.

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5.    Termination and Replacement of Trustee. This Agreement shall terminate as follows:

(a)    If the Trustee gives written notice to the Company that it desires to resign under this Agreement, the Company shall use its reasonable efforts to locate a successor trustee, pending which the Trustee shall continue to act in accordance with this Agreement. At such time that the Company notifies the Trustee that a successor trustee has been appointed and has agreed to become subject to the terms of this Agreement, the Trustee shall transfer the management of the Trust Account to the successor trustee, including, without limitation, the transfer of copies of the reports and statements relating to the Trust Account and any other reasonable transfer requests that the Company may make, whereupon this Agreement shall terminate; provided, however, that, in the event that the Company does not locate a successor trustee within ninety (90) days of receipt of the resignation notice from the Trustee, the Trustee may submit an application to have the Property deposited with any court in the State of New York or with the United States District Court for the Southern District of New York and upon such deposit, the Trustee shall be immune from any liability whatsoever.

(b)    At such time that the Trustee has completed the liquidation of the Trust Account and its obligations in accordance with the provisions of Section 1(i) and distributed the Property in accordance with the provisions of the Termination Letter, this Agreement shall terminate except with respect to Section 2(b).

(c)    If the Offering is not consummated within ten (10) business days of the date of this Agreement, in which case any funds received by the Trustee from the Company or C5 Sponsor LLC, a Delaware limited liability company, as applicable, shall be returned promptly following the receipt by the Trustee of written instructions from the Company.

6.    Miscellaneous.

(a)    The Company and the Trustee each acknowledge that the Trustee will follow the security procedures set forth below with respect to funds transferred from the Trust Account. The Company and the Trustee will each restrict access to confidential information relating to such security procedures to authorized persons. Each party must notify the other party immediately if it has reason to believe unauthorized persons may have obtained access to such confidential information or of any change in its authorized personnel. In executing funds transfers, the Trustee shall rely upon all information supplied to it by the Company, including, account names, account numbers and all other identifying information relating to a Beneficiary, Beneficiary’s bank or intermediary bank. Except for any liability arising out of the Trustee’s or its representatives’ gross negligence, fraud or willful misconduct, the Trustee shall not be liable for any loss, liability or out-of-pocket expense resulting from any error in the information or transmission of the funds.

(b)    This Agreement shall be governed by and construed and enforced in accordance with the laws of the State of New York, without giving effect to conflicts of law principles that would result in the application of the substantive laws of another jurisdiction. This Agreement may be executed in several original or facsimile counterparts, each one of which shall constitute an original, and together shall constitute but one instrument.

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(c)    This Agreement contains the entire agreement and understanding of the parties hereto with respect to the subject matter hereof. This Agreement or any provision hereof may only be changed, amended or modified (other than to correct a typographical error) by a writing signed by each of the parties hereto.

(d)    Sections 1(i) and 1(j) may only be changed, amended or modified pursuant to Section 6(c) with the Consent of the Stockholders, it being the specific intention of the parties hereto that each of the Company’s stockholders is, and shall be, a third party beneficiary of this Section 6(d) with the same right and power to enforce this Section 6(d) as the other parties hereto. For purposes of this Section 6(d), the “Consent of the Stockholders” means receipt by the Trustee of a certificate from the inspector of elections of the stockholder meeting certifying that either (i) the Company’s stockholders of record as of a record date established in accordance with Section 213(a) of the Delaware General Corporation Law, as amended (the “DGCL”) (or any successor rule), who hold sixty-five percent (65%) or more of all then outstanding shares of the Common Stock and Class B common stock, par value $0.0001 per share, of the Company voting together as a single class, have voted in favor of such change, amendment or modification, or (ii) the Company’s stockholders of record as of the record date who hold sixty-five percent (65%) or more of all then outstanding shares of the Common Stock and Class B common stock, par value $0.0001 per share, of the Company voting together as a single class, have delivered to such entity a signed writing approving such change, amendment or modification. No such amendment shall affect any Public Stockholder who has otherwise indicated his, her or its election to redeem his, her or its shares of Common Stock in connection with a stockholder vote sought to amend the Certificate of Incorporation. Except for any liability arising out of the Trustee’s or its representatives’ gross negligence, fraud or willful misconduct, the Trustee may rely conclusively on the certification from the inspector or elections referenced above and shall be relieved of all liability to any party for executing the proposed amendment in reliance thereon.

(e)    The parties hereto consent to the jurisdiction and venue of any state or federal court located in the City of New York, County of New York and State of New York, for purposes of resolving any disputes hereunder. AS TO ANY CLAIM, CROSS-CLAIM OR COUNTERCLAIM IN ANY WAY RELATING TO THIS AGREEMENT, EACH PARTY WAIVES THE RIGHT TO TRIAL BY JURY.

(f)    Any notice, consent or request to be given in connection with any of the terms or provisions of this 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 by facsimile or email transmission:

if to the Trustee, to:

Continental Stock Transfer & Trust Company

1 State Street

30th Floor

New York, New York 10004

Attention: Fran Wolf and Celeste Gonzalez

E-mail: fwolf@continentalstock.com

            cgonzalez@continentalstock.com

8

if to the Company, to:

C5 Acquisition Corporation

1701 Pennsylvania Ave NW

Washington, D.C. 20006

Attention: Robert Meyerson

in each case, with copies to:

Paul, Weiss, Rifkind, Wharton & Garrison LLP

1285 Avenue of the Americas

New York, New York 10019

Attention: Raphael R. Russo

E-mail: rrusso@paulweiss.com

and

Cantor Fitzgerald & Co.

499 Park Avenue

New York, New York, 10022

Attention: General Counsel

E-mail: #Legal-IBD@cantor.com

and

Moelis & Company, LLC

399 Park Avenue

New York, New York, 10105

Attention: Steven Halperin

E-mail: steven.halperin@moelis.com

in each case, with copies to:

Ellenoff Grossman & Schole LLP

1345 Avenue of the Americas

New York, New York 10105

Attention: General Counsel

(g)    Each of the Company and the Trustee hereby represents that it has the full right and power and has been duly authorized to enter into this Agreement and to perform its respective obligations as contemplated hereunder. The Trustee acknowledges and agrees that it shall not make any claims or proceed against the Trust Account, including by way of set-off, and shall not be entitled to any funds in the Trust Account under any circumstance.

9

(h)    Each of the Company and the Trustee hereby acknowledges and agrees that the Underwriter is a third party beneficiary of this Agreement.

(i)    The Trustee shall perform its duties under this Agreement in compliance with all applicable laws, including those relating to privacy, data protection and information security, shall keep confidential all information (including personally identifiable information and personal data) relating to this Agreement and, except as required by applicable law, shall not use such information for any purpose other than the performance of the Trustee’s obligations under this Agreement.

(j)    Except as specified herein, no party to this Agreement may assign its rights or delegate its obligations hereunder to any other person or entity without the written consent of the other party.

(k)    Notwithstanding anything to the contrary in this Agreement, for purposes of all services provided pursuant to this Agreement (the “Services”), the Trustee shall continuously maintain business continuity and disaster recovery plans (including regular updates) that are consistent with then current industry standards applicable to similarly situated providers of services comparable to the Services. Without limiting the generality of the foregoing, the business continuity and/or disaster recovery plans will cover the computer software, computer hardware, telecommunications capabilities and other similar or related items of automated, computerized, software system(s) and network(s) or system(s) and will be designed, among other things, to permit the ongoing operation and functionality of the Services on a continuous basis and/or to facilitate the continuation and/or resumption of, the Services. In the event of the disruption in the Services for any reason including the occurrence of a force majeure event that causes the Trustee to be required to allocate limited resources between or among the Trustee’s affected customers, the Trustee shall not do so in a manner that is intended to treat the Company less favorably than other similarly situated affected customers generally. In addition, in the event the Trustee has knowledge that there is, or has been, an incident affecting the integrity or availability of the Trustee’s business continuity and disaster recovery system, the Trustee shall endeavor to notify the Company in writing, as promptly as practicable, of the incident.

(l)    This Agreement may be executed in one or more counterparts, each of which shall for all purposes be deemed to be an original but all of which together shall constitute one and the same agreement. Only one counterpart signed by the party against whom enforceability is sought needs to be produced to evidence the existence of this Agreement.

[Signature Page Follows]

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IN WITNESS WHEREOF, the parties have duly executed this Investment Management Trust Agreement as of the date first written above.

[Signature Page to Investment Management Trust Agreement—C5 Acquisition Corporation]

Sch. A-1

EXHIBIT A

[Letterhead of Company]

[Insert date]

Continental Stock Transfer & Trust Company

1 State Street, 30^th Floor

New York, New York 10004

Attention: Francis Wolf and Celeste Gonzalez

Dear Mr. Wolf and Ms. Gonzalez:

Pursuant to Section 1(i) of the Investment Management Trust Agreement, dated as of January 6, 2022 (as amended, supplemented or otherwise modified from time to time, the “Trust Agreement”), by and between C5 Acquisition Corporation (the “Company”) and Continental Stock Transfer & Trust Company (the “Trustee”), this is to advise you that the Company has entered into an agreement with [Target] (the “Target Business”) to consummate a business combination with the Target Business (the “Business Combination”) on or about [Date]. The Company shall notify you at least seventy-two (72) hours in advance of the actual date of the consummation of the Business Combination (the “Consummation Date”). Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

In accordance with the terms of the Trust Agreement, we hereby authorize you to commence the liquidation of all of the assets in the Trust Account, and to transfer the proceeds into the trust operating account at JPMorgan Chase Bank, N.A. to the effect that, on the Consummation Date, all of the funds held in the Trust Account will be immediately available for transfer to the account or accounts that the Company shall direct on the Consummation Date (including as directed to it by the Underwriter) (with respect to the Deferred Discount). It is acknowledged and agreed that, while the funds are on deposit in the trust operating account at JPMorgan Chase Bank, N.A., awaiting distribution, the Company will not earn any interest or dividends.

On the Consummation Date, (i) counsel for the Company shall deliver to you written notification that the Business Combination has been consummated or will be consummated substantially concurrently with your transfer of funds to the accounts as directed by the Company (the “Notification”) and (ii) the Company shall deliver to you (a) [an affidavit][a certificate] of the Chief Executive Officer of the Company, which verifies that the Business Combination has been approved by a vote of the Company’s stockholders, if a stockholder vote is held, and (b) a joint written instruction signed by the Company and the Underwriter with respect to the transfer of the funds held in the Trust Account, including payment of amounts owed to public stockholders who have properly exercised their redemptions rights and payment of amounts of the Deferred Discount to the underwriter from the Trust Account directly to the account or accounts directed by the Underwriter (the “Instruction Letter”). You are hereby directed and authorized to transfer the funds held in the Trust Account immediately upon your receipt of the Notification and the

Ex. A-1

Instruction Letter in accordance with the terms of the Instruction Letter. In the event that certain deposits held in the Trust Account may not be liquidated by the Consummation Date without penalty, you will notify the Company in writing of the same and the Company shall direct you as to whether such funds should remain in the Trust Account and be distributed after the Consummation Date to the Company. Upon the distribution of all the funds, net of any payments necessary for reasonable unreimbursed expenses related to liquidating the Trust Account, your obligations under the Trust Agreement shall be terminated.

In the event that the Business Combination is not consummated on the Consummation Date described in the notice thereof and we have not notified you on or before the original Consummation Date of a new Consummation Date, then upon receipt by the Trustee of written instructions from the Company, the funds held in the Trust Account shall be reinvested as provided in Section 1(c) of the Trust Agreement on the business day immediately following the Consummation Date as set forth in such written instructions as soon thereafter as possible.

Ex. A-2

EXHIBIT B

[Letterhead of Company]

[Insert date]

Continental Stock Transfer & Trust Company

1 State Street, 30^th Floor

New York, New York 10004

Attention: Francis Wolf and Celeste Gonzalez

Dear Mr. Wolf and Ms. Gonzalez:

Pursuant to Section 1(i) of the Investment Management Trust Agreement, dated as of January 6, 2022 (as amended, supplemented or otherwise modified from time to time, the “Trust Agreement”), by and between C5 Acquisition Corporation (the “Company”) and Continental Stock Transfer & Trust Company, this is to advise you that the Company has been unable to effect a Business Combination with a target business within the time frame specified in the Certificate of Incorporation, as described in the Company’s Prospectus relating to the Offering. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

In accordance with the terms of the Trust Agreement, we hereby authorize you to liquidate all of the assets in the Trust Account and to transfer the total proceeds into a segregated account held by you on behalf of the Beneficiaries to await distribution to the Public Stockholders. The Company has selected [insert completion deadline] as the effective date for the purpose of determining when the Public Stockholders will be entitled to receive their share of the liquidation proceeds. You agree to be the paying agent of record and, in your separate capacity as paying agent, agree to distribute said funds directly to the Public Stockholders in accordance with the terms of the Trust Agreement and the Certificate of Incorporation. Upon the distribution of all the funds, net of any payments necessary for reasonable unreimbursed expenses related to liquidating the Trust Account, your obligations under the Trust Agreement shall be terminated, except to the extent otherwise provided in Section 1(i) of the Trust Agreement.

Ex. B-1

EXHIBIT C

[Letterhead of Company]

[Insert date]

Continental Stock Transfer & Trust Company

1 State Street, 30^th Floor

New York, New York 10004

Attention: Francis Wolf and Celeste Gonzalez

Dear Mr. Wolf and Ms. Gonzalez:

Pursuant to Section 1(j) of the Investment Management Trust Agreement, dated as of January 6, 2022 (as amended, supplemented or otherwise modified from time to time, the “Trust Agreement”), by and between C5 Acquisition Corporation. (the “Company”) and Continental Stock Transfer & Trust Company, the Company hereby requests that you deliver to the Company $                     of the interest income earned on the Property as of the date hereof. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

The Company needs such funds to pay for the tax obligations as set forth on the attached tax return or tax statement. In accordance with the terms of the Trust Agreement, you are hereby directed and authorized to transfer (via wire transfer) such funds promptly upon your receipt of this letter to the Company’s operating account at:

[WIRE INSTRUCTION INFORMATION]

Ex. C-1

EXHIBIT D

[Letterhead of Company]

[Insert date]

Continental Stock Transfer & Trust Company

1 State Street, 30^th Floor

New York, New York 10004

Attention: Francis Wolf and Celeste Gonzalez

Dear Mr. Wolf and Ms. Gonzalez:

Pursuant to Section 1(l) of the Investment Management Trust Agreement, dated as of January 6, 2022 (as amended, supplemented or otherwise modified from time to time, the “Trust Agreement”), by and between C5 Acquisition Corporation (the “Company”) and Continental Stock Transfer & Trust Company, the Company hereby requests that you deliver to the redeeming Public Stockholders of the Company $                     of the principal and interest income earned on the Property as of the date hereof into a segregated account held by you on behalf of the Beneficiaries for distribution to the Public Stockholders who have requested redemption of their shares. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

The Company needs such funds to pay the Public Stockholders who have properly elected to have their shares of Common Stock redeemed by the Company in connection with a stockholder vote to approve an amendment to the Certificate of Incorporation. As such, you are hereby directed and authorized to transfer (via wire transfer) such funds promptly upon your receipt of this letter.

Ex. D-1

Exhibit 10.3

EXECUTION VERSION

REGISTRATION RIGHTS AGREEMENT

THIS REGISTRATION RIGHTS AGREEMENT, dated as of January 6, 2022 (as amended, supplemented or otherwise modified from time to time, this “Agreement”), is made and entered into by and among C5 Acquisition Corporation, a Delaware corporation (the “Company”), C5 Sponsor LLC, a Delaware limited liability company (the “Sponsor”), and the undersigned parties listed as Holders on the signature pages hereto (each such party, together with the Sponsor and any person or entity who hereafter becomes a party to this Agreement pursuant to Section 5.2, a “Holder” and, collectively, the “Holders”).

RECITALS

WHEREAS, as of the date of the consummation of the Company’s initial public offering, the Sponsor and the Holders collectively will own an aggregate of 7,187,500 shares after giving effect to stock splits occurring on or prior to the date hereof, (the “Founder Shares”) of Class B common stock, par value $0.0001 per share, of the Company (the “Class B Common Stock”), up to 937,500 of which are subject to forfeiture by the Sponsor to the Company for no consideration depending on the extent to which the underwriters of the Company’s initial public offering exercise their option to purchase additional units;

WHEREAS, the Founder Shares will automatically convert into Class A common stock, par value $0.0001 per share, of the Company (the “Common Stock”) at the time of the Company’s initial business combination on a one-for-one basis, subject to adjustment, on the terms and conditions set forth in the Company’s amended and restated certificate of incorporation, as further amended, supplemented or otherwise modified from time to time;

WHEREAS, on January 6, 2022, the Company and the Sponsor entered into that certain private placement warrants purchase agreement (the “Private Placement Warrants Purchase Agreement”), pursuant to which the Sponsor agreed to purchase 13,535,500 private placement warrants (or up to 15,035,500 private placement warrants, depending on the extent to which the underwriters exercise their option to purchase additional units) (the “Private Placement Warrants”) in a private placement transaction occurring simultaneously with the closing of the Company’s initial public offering;

WHEREAS, in order to finance the Company’s transaction costs in connection with its search for and consummation of an initial Business Combination (as defined below) the Sponsor, or affiliates of the Sponsor, or certain of the Company’s officers and directors may loan to the Company funds as the Company may require, of which up to $2,000,000 of such loans may be convertible into warrants (“Working Capital Warrants”) at a price of $1.00 per warrant; and

WHEREAS, the Company and the Holders desire to enter into this Agreement, pursuant to which the Company shall grant the Holders certain registration rights with respect to certain securities of the Company, as set forth in this Agreement.

NOW, THEREFORE, in consideration of the representations, covenants and agreements contained herein, and certain other good and valuable consideration, the receipt and

sufficiency of which are hereby acknowledged, the Company, intending to be legally bound in favor of each Holder, and each Holder, intending to be legally bound, severally and not jointly, in favor of the Company, hereby agree as follows:

ARTICLE I

DEFINITIONS

1.1.    Definitions. The terms defined in this Article I shall, for all purposes of this Agreement, have the respective meanings set forth below:

“Adverse Disclosure” shall mean any public disclosure of material non-public information, which disclosure, in the good faith judgment of the Chief Executive Officer or principal financial officer of the Company, after consultation with counsel to the Company, (i) would be required to be made in any Registration Statement or Prospectus in order for the applicable Registration Statement or Prospectus not to contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements contained therein (in the case of any prospectus and any preliminary prospectus, in the light of the circumstances under which they were made) not misleading, (ii) would not be required to be made at such time if the Registration Statement were not being filed, and (iii) the Company has a bona fide business purpose for not making such information public.

“Agreement” shall have the meaning given in the Preamble.

“Board” shall mean the board of directors of the Company.

“Business Combination” shall mean any merger, consolidation, capital stock exchange, asset acquisition, stock purchase, reorganization or other similar business combination with one or more businesses or entities involving the Company.

“Business Day” shall mean any day other than a Saturday or Sunday, that is neither a legal holiday nor a day on which banking institutions are generally authorized or required by law or regulation to close in the City of New York, New York.

“Class B Common Stock” shall have the meaning given in the Recitals.

“Commission” shall mean the Securities and Exchange Commission.

“Common Stock” shall have the meaning given in the Recitals.

“Company” shall have the meaning given in the Preamble.

“Demand Registration” shall have the meaning given in subsection 2.1.1.

“Demanding Holder” shall have the meaning given in subsection 2.1.1.

“Exchange Act” shall mean the Securities Exchange Act of 1934, as amended from time to time.

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“Form S-1” shall have the meaning given in subsection 2.1.1.

“Form S-3” shall have the meaning given in subsection 2.3.

“Founder Shares” shall have the meaning given in the Recitals and shall be deemed to include the shares of Common Stock issued or issuable upon conversion thereof.

“Founder Shares Lock-Up Period” shall mean, with respect to the Founder Shares, the period ending on the earlier of (A) one (1) year after the date of the completion of the Company’s initial Business Combination and (B) subsequent to the date of the completion of the Company’s initial Business Combination, (i) the date on which the last reported sale price of the Common Stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any twenty (20) trading days within any thirty (30)-trading day period commencing at least one-hundred-fifty (150) days after the date of the completion of the Company’s initial Business Combination or (ii) the date on which the Company completes a liquidation, merger, stock exchange, reorganization or other similar transaction which results in all of the Company’s public stockholders having the right to exchange their shares of Common Stock for cash, securities or other property.

“Holders” shall have the meaning given in the Preamble.

“Insider Letter” shall mean that certain letter agreement, dated as of January 6, 2022, as amended, supplemented or otherwise modified from time to time, by and among the Company, the Sponsor and each of the Company’s officers, directors and advisors.

“Maximum Number of Securities” shall have the meaning given in subsection 2.1.4.

“Misstatement” shall mean an untrue statement of a material fact or an omission to state a material fact required to be stated in a Registration Statement or Prospectus or necessary to make the statements in a Registration Statement or Prospectus (in the case of a Prospectus, in the light of the circumstances under which they were made) not misleading.

“Permitted Transferees” shall mean any person or entity to whom a Holder of Registrable Securities is permitted to transfer such Registrable Securities prior to the expiration of the Founder Shares Lock-Up Period, the Private Placement Lock-Up Period or any other lock-up period, as the case may be, and pursuant to the Insider Letter, the Private Placement Warrants Purchase Agreement, this Agreement and any other applicable agreement between such Holder and the Company, in each case, for so long as such agreements remain in effect, and to any transferee thereafter.

“Piggyback Registration” shall have the meaning given in subsection 2.2.1.

“Private Placement Lock-Up Period” shall mean, with respect to the Private Placement Warrants that are held by the initial purchasers of such Private Placement Warrants or their Permitted Transferees and any shares of Common Stock issued or issuable upon the exercise or conversion of the Private Placement Warrants that are held by the initial purchasers of such Private Placement Warrants or their Permitted Transferees, the period ending thirty (30) days after the completion of the Company’s initial Business Combination.

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“Private Placement Warrants” shall have the meaning given in the Recitals.

“Private Placement Warrants Purchase Agreement” shall have the meaning given in the Recitals.

“Prospectus” shall mean the prospectus included in any Registration Statement, as supplemented by any and all prospectus supplements, and as amended by any and all post-effective amendments and including all material incorporated by reference in such prospectus.

“Prospectus Date” shall mean the date of the final prospectus filed with the Commission and relating to the Company’s initial public offering.

“Registrable Security” shall mean (a) the Founder Shares and the shares of Common Stock issued or issuable upon the conversion of any Founder Shares, (b) the Private Placement Warrants (including any shares of Common Stock issued or issuable upon the exercise of any such Private Placement Warrants), (c) any outstanding shares of Common Stock or any other equity security (including the shares of Common Stock issued or issuable upon the exercise of any other equity security, units comprising shares of Common Stock or warrants) of the Company held by a Holder from time to time, (d) any equity securities (including the shares of Common Stock issued or issuable upon the exercise of any such equity security) of the Company issued or issuable upon conversion of any working capital loans in an amount of up to $2,000,000 made to the Company by a Holder (including the Working Capital Warrants and any shares of Common Stock issued or issuable upon the exercise of the Working Capital Warrants) and (e) any other equity security of the Company issued or issuable with respect to any such share of Common Stock by way of a stock dividend or stock split or in connection with a combination of shares, recapitalization, merger, consolidation or reorganization; provided, however, that, as to any particular Registrable Security, such securities shall cease to be Registrable Securities when (A) a Registration Statement with respect to the sale of such securities shall have become effective under the Securities Act and such securities shall have been sold, transferred, disposed of or exchanged in accordance with such Registration Statement, (B) such securities shall have been otherwise transferred, new certificates for such securities not bearing a legend restricting further transfer shall have been delivered by the Company and subsequent public distribution of such securities shall not require registration under the Securities Act, (C) such securities shall have ceased to be outstanding, (D) such securities have been sold without registration pursuant to Section 4(a)(1) of the Securities Act or Rule 144 promulgated under the Securities Act (or any successor rule promulgated thereafter by the Commission) without limitation on the amount of securities sold or the manner of sale or (E) such securities have been sold to, or through, a broker, dealer or underwriter in a public distribution or other public securities transaction.

“Registration” shall mean a registration effected by preparing and filing a registration statement or similar document in compliance with the requirements of the Securities Act, and the applicable rules and regulations promulgated thereunder, and such registration statement becoming effective.

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“Registration Expenses” shall mean the out-of-pocket expenses of a Registration, including the following:

(A)    all registration, filing and listing fees and expenses (including fees with respect to filings required to be made with the Financial Industry Regulatory Authority, Inc. and any securities exchange on which the shares of Common Stock are then listed);

(B)    fees and expenses of compliance with securities or blue sky laws (including reasonable fees and disbursements of counsel to the Underwriters in connection with blue sky qualifications of Registrable Securities);

(C)    printing, messenger, telephone and delivery expenses;

(D)    reasonable fees and disbursements of counsel for the Company;

(E)    reasonable fees and disbursements of all independent registered public accountants of the Company incurred specifically in connection with such Registration;

(F)    reasonable fees and expenses of one (1) legal counsel selected by the majority-in-interest of the Demanding Holders initiating a Demand Registration to be registered for offer and sale in the applicable Registration; and

(G)    reasonable fees and disbursements of the Underwriters customarily paid by the issuer or sellers of securities, including liability insurance if the Company so desires or if the Underwriters so require (excluding underwriting discounts and commissions and transfer taxes, if any, and fees and disbursements of counsel to the Underwriters (other than reasonable fees and disbursements of counsel to the Underwriters in connection with blue sky qualifications of Registrable Securities)).

“Registration Statement” shall mean any registration statement that covers the Registrable Securities pursuant to the provisions of this Agreement, including the Prospectus included in such registration statement, amendments (including post-effective amendments) and supplements to such registration statement, and all exhibits to and all material incorporated by reference in such registration statement.

“Requesting Holder” shall have the meaning given in subsection 2.1.1.

“Securities Act” shall mean the Securities Act of 1933, as amended from time to time.

“Sponsor” shall have the meaning given in the Preamble.

“Underwriter” shall mean a securities dealer who purchases any Registrable Securities as principal in an Underwritten Offering and not as part of such dealer’s market-making activities.

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“Underwritten Registration” or “Underwritten Offering” shall mean a Registration in which securities of the Company are sold to an Underwriter in a firm commitment underwriting for distribution to the public.

“Working Capital Warrants” shall have the meaning given in the Recitals.

ARTICLE II

REGISTRATIONS

2.1.    Demand Registration.

2.1.1    Request for Registration. Subject to the provisions of subsection 2.1.4 and Section 2.4, at any time and from time to time on or after the date the Company consummates the Business Combination, the Holders of at least twenty percent (20%) in interest of the then outstanding number of Registrable Securities (the “Demanding Holders”) may make a written demand for Registration of all or part of their Registrable Securities, which written demand shall describe the amount and type of securities to be included in such Registration and the intended method(s) of distribution thereof (a “Demand Registration”). The Company shall, within ten (10) Business Days of the Company’s receipt of the Demand Registration, notify in writing all other Holders of Registrable Securities of such Demand Registration, and each Holder of Registrable Securities who thereafter wishes to include all or a portion of such Holder’s Registrable Securities in a Registration pursuant to a Demand Registration (each such Holder that includes all or a portion of such Holder’s Registrable Securities in such Registration, a “Requesting Holder”) shall so notify the Company in writing within five (5) Business Days after the receipt by the Holder of the notice from the Company. Upon receipt by the Company of any such written notification from a Requesting Holder(s) to the Company, such Requesting Holder(s) shall be entitled to have their Registrable Securities included in a Registration pursuant to a Demand Registration and the Company shall file, as soon thereafter as practicable, but not more than forty-five (45) days immediately after the Company’s receipt of the Demand Registration request, a registration statement covering all Registrable Securities requested by the Demanding Holders and Requesting Holders pursuant to such Demand Registration and shall cause such registration statement to become effective as soon thereafter as practicable. Under no circumstances shall the Company be obligated to effect more than an aggregate of three (3) Registrations pursuant to a Demand Registration under this subsection 2.1.1 with respect to any or all Registrable Securities; provided, however, that a Registration shall not be counted for such purposes unless a Form S-1 or any similar long-form registration statement that may be available at such time (“Form S-1”) has become effective and all of the Registrable Securities requested by the Requesting Holders to be registered on behalf of the Requesting Holders in such Form S-1 Registration have been sold in accordance with Section 3.1 of this Agreement.

2.1.2    Effective Registration. Notwithstanding the provisions of subsection 2.1.1 above or any other part of this Agreement, a Registration pursuant to a Demand Registration shall not count as a Registration unless and until (i) the Registration Statement filed with the Commission with respect to a Registration pursuant to a Demand Registration has been declared effective by the Commission and (ii) the Company has complied with all of its obligations under this Agreement with respect thereto; provided, however, that if, after such Registration Statement has been declared effective, an offering of Registrable Securities in a Registration pursuant to a

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Demand Registration is subsequently interfered with by any stop order or injunction of the Commission, federal or state court or any other governmental agency, the Registration Statement with respect to such Registration shall be deemed not to have been declared effective, unless and until (i) such stop order or injunction is removed, rescinded or otherwise terminated and (ii) a majority-in-interest of the Demanding Holders initiating such Demand Registration thereafter affirmatively elect to continue with such Registration and accordingly notify the Company in writing, but in no event later than five (5) days, of such election; provided, further, that the Company shall not be obligated or required to file another Registration Statement until the Registration Statement that has been previously filed with respect to a Registration pursuant to a Demand Registration becomes effective or is subsequently terminated.

2.1.3    Underwritten Offering. Subject to the provisions of subsection 2.1.4 and Section 2.4, if a majority-in-interest of the Demanding Holders so advise the Company as part of their Demand Registration that the offering of the Registrable Securities pursuant to such Demand Registration shall be in the form of an Underwritten Offering, then the right of such Demanding Holder or Requesting Holder (if any) to include its Registrable Securities in such Registration shall be conditioned upon such Demanding Holder’s or Requesting Holder’s participation in such Underwritten Offering and the inclusion of such Demanding Holder’s or Requesting Holder’s Registrable Securities in such Underwritten Offering to the extent provided herein. All such Demanding Holders and Requesting Holders proposing to distribute their Registrable Securities through an Underwritten Offering under this subsection 2.1.3 shall enter into an underwriting agreement in customary form with the Underwriter(s) selected for such Underwritten Offering by the majority-in-interest of the Demanding Holders initiating the Demand Registration.

2.1.4    Reduction of Underwritten Offering. If the managing Underwriter or Underwriters in an Underwritten Registration pursuant to a Demand Registration, in good faith, advise(s) the Company, the Demanding Holders and the Requesting Holders (if any) in writing that the dollar amount or number of Registrable Securities that the Demanding Holders and the Requesting Holders (if any) desire to sell, taken together with all other Common Stock or other equity securities that the Company desires to sell and the Common Stock, if any, as to which a Registration has been requested pursuant to separate written contractual piggyback registration rights held by any other stockholders who desire to sell, exceeds the maximum dollar amount or maximum number of equity securities that can be sold in the Underwritten Offering without adversely affecting the proposed offering price, the timing, the distribution method or the probability of success of such offering (such maximum dollar amount or maximum number of such securities, as applicable, the “Maximum Number of Securities”), then the Company shall include in such Underwritten Offering, as follows: (i) first, the Registrable Securities of the Demanding Holders and the Requesting Holders (if any) (pro rata based on the respective number of Registrable Securities that each Demanding Holder and Requesting Holder (if any) has requested be included in such Underwritten Registration and the aggregate number of Registrable Securities that the Demanding Holders and the Requesting Holders have requested be included in such Underwritten Registration) that can be sold without exceeding the Maximum Number of Securities; (ii) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (i), the Registrable Securities of Holders exercising their rights to register their Registrable Securities pursuant to subsection 2.2.1 (pro rata based on the respective number of Registrable Securities that each Holder has so requested), without exceeding the Maximum Number of Securities; (iii) third, to the extent that the Maximum Number of Securities

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has not been reached under the foregoing clauses (i) and (ii), Common Stock or other equity securities that the Company desires to sell, which can be sold without exceeding the Maximum Number of Securities; and (iv) fourth, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (i), (ii) and (iii), Common Stock or other equity securities of other persons or entities that the Company is obligated to register in a Registration pursuant to separate written contractual arrangements with such persons and that can be sold without exceeding the Maximum Number of Securities.

2.1.5    Demand Registration Withdrawal. A majority-in-interest of the Demanding Holders initiating a Demand Registration or a majority-in-interest of the Requesting Holders (if any), pursuant to a Registration under subsection 2.1.1 shall have the right to withdraw from a Registration pursuant to such Demand Registration for any or no reason whatsoever upon written notification to the Company and the managing Underwriter or Underwriters, if any, of their intention to withdraw from such Registration prior to the effectiveness of the Registration Statement filed with the Commission with respect to the Registration of their Registrable Securities pursuant to such Demand Registration. Notwithstanding anything to the contrary in this Agreement, the Company shall be responsible for the Registration Expenses incurred in connection with a Registration pursuant to a Demand Registration prior to its withdrawal under this subsection 2.1.5.

2.2.    Piggyback Registration.

2.2.1    Piggyback Rights. If, at any time on or after the date the Company consummates a Business Combination, the Company proposes to file a Registration Statement under the Securities Act with respect to an offering of equity securities, or securities or other obligations exercisable or exchangeable for, or convertible into equity securities, for its own account or for the account of stockholders of the Company (or by the Company and by the stockholders of the Company, including pursuant to Section 2.1), other than a Registration Statement (i) filed in connection with any employee stock option or other benefit plan, (ii) for an exchange offer or offering of securities solely to the Company’s existing stockholders, (iii) for an offering of debt that is convertible into equity securities of the Company or (iv) for a dividend reinvestment plan, then the Company shall give written notice of such proposed filing to all of the Holders of Registrable Securities as soon as practicable but not less than ten (10) days before the anticipated filing date of such Registration Statement, which notice shall (A) describe the amount and type of securities to be included in such offering, the intended method(s) of distribution and the name of the proposed managing Underwriter or Underwriters, if any, in such offering, and (B) offer to all of the Holders of Registrable Securities the opportunity to register the sale of such number of Registrable Securities as such Holders may request in writing within five (5) days after receipt of such written notice (such Registration, a “Piggyback Registration”). The Company shall, in good faith, cause such Registrable Securities to be included in such Piggyback Registration and shall use its best efforts to cause the managing Underwriter or Underwriters of a proposed Underwritten Offering to permit the Registrable Securities requested by the Holders pursuant to this subsection 2.2.1 to be included in a Piggyback Registration on the same terms and conditions as any similar securities of the Company included in such Registration and to permit the sale or other disposition of such Registrable Securities in accordance with the intended method(s) of distribution thereof. All such Holders proposing to distribute their Registrable Securities through an Underwritten Offering under this subsection 2.2.1 shall enter into an underwriting agreement in customary form with the Underwriter(s) selected for such Underwritten Offering by the Company.

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2.2.2    Reduction of Piggyback Registration. If the managing Underwriter or Underwriters in an Underwritten Registration that is to be a Piggyback Registration, in good faith, advises the Company and the Holders of Registrable Securities participating in the Piggyback Registration in writing that the dollar amount or number of shares of Common Stock that the Company desires to sell, taken together with (i) the shares of Common Stock, if any, as to which Registration has been demanded pursuant to separate written contractual arrangements with persons or entities other than the Holders of Registrable Securities hereunder, (ii) the Registrable Securities as to which registration has been requested pursuant to Section 2.2 and (iii) the shares of Common Stock, if any, as to which Registration has been requested pursuant to separate written contractual piggyback registration rights of other stockholders of the Company, exceeds the Maximum Number of Securities, then:

(a)    If the Registration is undertaken for the Company’s account, the Company shall include in any such Registration (i) first, Common Stock or other equity securities that the Company desires to sell, which can be sold without exceeding the Maximum Number of Securities, (ii) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (i), the Registrable Securities of Holders exercising their rights to register their Registrable Securities pursuant to subsection 2.2.1 (pro rata based on the number of Registrable Securities that each Holder has so requested), which can be sold without exceeding the Maximum Number of Securities and (iii) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (i) and (ii), shares of Common Stock, if any, as to which Registration has been requested pursuant to written contractual piggyback registration rights of other stockholders of the Company, which can be sold without exceeding the Maximum Number of Securities;

(b)    If the Registration is pursuant to a request by persons or entities other than the Holders of Registrable Securities, then the Company shall include in any such Registration (i) first, Common Stock or other equity securities, if any, of such requesting persons or entities, other than the Holders of Registrable Securities, which can be sold without exceeding the Maximum Number of Securities, (ii) second, to the extent that the Maximum Number of Securities has not been reached under the foregoing clause (i), the Registrable Securities of Holders exercising their rights to register their Registrable Securities pursuant to subsection 2.2.1 (pro rata based on the number of Registrable Securities that each Holder has so requested), which can be sold without exceeding the Maximum Number of Securities, (C) third, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (i) and (ii), shares of Common Stock or other equity securities that the Company desires to sell, which can be sold without exceeding the Maximum Number of Securities and (iv) fourth, to the extent that the Maximum Number of Securities has not been reached under the foregoing clauses (i), (ii) and (iii), shares of Common Stock or other equity securities for the account of other persons or entities that the Company is obligated to register pursuant to separate written contractual arrangements with such persons or entities, which can be sold without exceeding the Maximum Number of Securities.

2.2.3    Piggyback Registration Withdrawal. Any Holder of Registrable Securities shall have the right to withdraw from a Piggyback Registration for any or no reason whatsoever

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upon written notification to the Company and the managing Underwriter or Underwriters, if any, of his, her or its intention to withdraw from such Piggyback Registration prior to the effectiveness of the Registration Statement filed with the Commission with respect to such Piggyback Registration. The Company (whether on its own good faith determination or as the result of a request for withdrawal by persons pursuant to separate written contractual obligations) may withdraw a Registration Statement filed with the Commission in connection with a Piggyback Registration at any time prior to the effectiveness of such Registration Statement. Notwithstanding anything to the contrary in this Agreement, the Company shall be responsible for the Registration Expenses incurred in connection with the Piggyback Registration prior to its withdrawal under this subsection 2.2.3.

2.2.4    Unlimited Piggyback Registration Rights. For purposes of clarity, any Registration effected pursuant to Section 2.2 shall not be counted as a Registration pursuant to a Demand Registration effected under Section 2.1.

2.3.    Registrations on Form S-3. The Holders of Registrable Securities may at any time, and from time to time, request in writing that the Company, pursuant to Rule 415 under the Securities Act (or any successor rule promulgated thereafter by the Commission), register the resale of any or all of their Registrable Securities on Form S-3 or any similar short-form registration statement that may be available at such time (“Form S-3”); provided, however, that the Company shall not be obligated to effect such request through an Underwritten Offering. Within five (5) days of the Company’s receipt of a written request from a Holder or Holders of Registrable Securities for a Registration on Form S-3, the Company shall promptly give written notice of the proposed Registration on Form S-3 to all other Holders of Registrable Securities, and each Holder of Registrable Securities who thereafter wishes to include all or a portion of such Holder’s Registrable Securities in such Registration on Form S-3 shall so notify the Company in writing within ten (10) days after the receipt by the Holder of the notice from the Company. As soon as practicable thereafter, but not more than twelve (12) days after the Company’s initial receipt of such written request for a Registration on Form S-3, the Company shall register all or such portion of such Holder’s Registrable Securities as are specified in such written request, together with all or such portion of Registrable Securities of any other Holder or Holders joining in such request as are specified in the written notification given by such Holder or Holders; provided, however, that the Company shall not be obligated to effect any such Registration pursuant to Section 2.3 if (i) a Form S-3 is not available for such offering or (ii) the Holders of Registrable Securities, together with the Holders of any other equity securities of the Company entitled to inclusion in such Registration, propose to sell the Registrable Securities and such other equity securities (if any) at any aggregate price to the public of less than $25,000,000. Any request for any underwritten offering pursuant to a Form S-3 shall follow the procedures of Section 2.1 (including Section 2.1.4) but, for the avoidance of doubt, shall not count as a demand registration or an exercise of any demand rights.

2.4.    Restrictions on Registration Rights. If (A) during the period starting with the date sixty (60) days prior to the Company’s good faith estimate of the date of the filing of, and ending on a date one-hundred-twenty (120) days after the effective date of, a Company initiated Registration; provided, however, that the Company has filed, or delivered written notice to the Holders of the intent to file, a Company initiated Registration prior to receipt of a Demand Registration pursuant to subsection 2.1.1; provided, further, that, if the Company receives a

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Demand Registration pursuant to subsection 2.1.1 prior the effective date of such Company initiated Registration, the Company continues to actively employ, in good faith, all reasonable efforts to cause the applicable Registration Statement to become effective, (B) the Holders have requested an Underwritten Registration and the Company and the Holders are unable to obtain the commitment of underwriters to firmly underwrite the offer or (C) in the good faith judgment of the Board such Registration would be seriously detrimental to the Company and the Board concludes as a result that it is essential to defer the filing of such Registration Statement at such time, then in each case the Company shall furnish to such Holders a certificate signed by the chair of the Board stating that in the good faith judgment of the Board it would be seriously detrimental to the Company for such Registration Statement to be filed in the near future and that it is therefore essential to defer the filing of such Registration Statement. In such event, the Company shall have the right to defer such filing for a period of not more than thirty (30) days; provided, however, that the Company shall not defer its obligation in this manner more than once in any 12-month period. Notwithstanding anything to the contrary contained in this Agreement or the effectiveness of any Registration Statement, no sales of Registrable Securities shall be effected by any Holder until after the expiration of the Founder Shares Lock-Up Period or the Private Placement Lock-Up Period, as the case may be.

2.5.    Limitations on Underwriters’ Registration Rights. Notwithstanding anything herein to the contrary, (i) the underwriters in the Company’s initial public offering may not exercise their rights under Sections 2.1 and 2.2 after five (5) and seven (7) years after the effective date of the Registration Statement relating to the Company’s initial public offering, respectively, and (ii) the underwriters in the Company’s initial public offering may not exercise their rights under Section 2.1 more than one (1) time.

ARTICLE III

COMPANY PROCEDURES

3.1.    General Procedures. If at any time on or after the date the Company consummates a Business Combination the Company is required to effect the Registration of Registrable Securities, the Company shall use its best efforts to effect such Registration to permit the sale of such Registrable Securities in accordance with the intended plan of distribution thereof, and pursuant thereto the Company shall, as expeditiously as possible:

3.1.1    prepare and file with the Commission as soon as practicable a Registration Statement with respect to such Registrable Securities and use its reasonable best efforts to cause such Registration Statement to become effective and remain effective until all Registrable Securities covered by such Registration Statement have been sold;

3.1.2     prepare and file with the Commission such amendments and post-effective amendments to the Registration Statement, and such supplements to the Prospectus, as may be requested by the Holders or any Underwriter of Registrable Securities or as may be required by the rules, regulations or instructions applicable to the registration form used by the Company or by the Securities Act or rules and regulations thereunder to keep the Registration Statement effective until all Registrable Securities covered by such Registration Statement are sold in accordance with the intended plan of distribution set forth in such Registration Statement or supplement to the Prospectus;

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3.1.3    prior to filing a Registration Statement or prospectus, or any amendment or supplement thereto, furnish without charge to the Underwriters, if any, and the Holders of Registrable Securities included in such Registration, and the Holders’ legal counsel, copies of such Registration Statement as proposed to be filed, each amendment and supplement to such Registration Statement (in each case including all exhibits thereto and documents incorporated by reference therein), the Prospectus included in such Registration Statement (including each preliminary Prospectus), and such other documents as the Underwriters and the Holders of Registrable Securities included in such Registration or the legal counsel for any such Holders may request in order to facilitate the disposition of the Registrable Securities owned by such Holders;

3.1.4    prior to any public offering of Registrable Securities, use its best efforts to (i) register or qualify the Registrable Securities covered by the Registration Statement under such securities or “blue sky” laws of such jurisdictions in the United States as the Holders of Registrable Securities included in such Registration Statement (in light of their intended plan of distribution) may request and (ii) take such action necessary to cause such Registrable Securities covered by the Registration Statement to be registered with or approved by such other governmental authorities as may be necessary by virtue of the business and operations of the Company and do any and all other acts and things that may be necessary or advisable to enable the Holders of Registrable Securities included in such Registration Statement to consummate the disposition of such Registrable Securities in such jurisdictions; provided, however, that the Company shall not be required to qualify generally to do business in any jurisdiction where it would not otherwise be required to qualify or take any action to which it would be subject to general service of process or taxation in any such jurisdiction where it is not then otherwise so subject;

3.1.5    cause all such Registrable Securities to be listed on each securities exchange or automated quotation system on which similar securities issued by the Company are then listed;

3.1.6    provide a transfer agent or warrant agent, as applicable, and registrar for all such Registrable Securities no later than the effective date of such Registration Statement;

3.1.7    advise each seller of such Registrable Securities, promptly after it shall receive notice or obtain knowledge thereof, of the issuance of any stop order by the Commission suspending the effectiveness of such Registration Statement or the initiation or threatening of any proceeding for such purpose and promptly use its reasonable best efforts to prevent the issuance of any stop order or to obtain its withdrawal if such stop order should be issued;

3.1.8    at least five (5) days prior to the filing of any Registration Statement or Prospectus or any amendment or supplement to such Registration Statement or Prospectus or any document that is to be incorporated by reference into such Registration Statement or Prospectus, furnish a copy thereof to each seller of such Registrable Securities or its counsel;

3.1.9    notify the Holders at any time when a Prospectus relating to such Registration Statement is required to be delivered under the Securities Act, of the happening of any event as a result of which the Prospectus included in such Registration Statement, as then in effect, includes a Misstatement, and then to correct such Misstatement as set forth in Section 3.4;

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3.1.10    permit a representative of the Holders, the Underwriters, if any, and any attorney or accountant retained by the Holders or the Underwriters to participate, at each such person’s own expense, in the preparation of the Registration Statement, and cause the Company’s officers, directors and employees to supply all information reasonably requested by any such representative, the Underwriters, attorney or accountant in connection with the Registration; provided, however, that such representatives or the Underwriters enter into a confidentiality agreement, in form and substance reasonably satisfactory to the Company, prior to the release or disclosure of any such information; provided, further, that the Company may not include the name of any Holder or Underwriter or any information regarding any Holder or Underwriter in any Registration Statement or Prospectus, any amendment or supplement to such Registration Statement or Prospectus, any document that is to be incorporated by reference into such Registration Statement or Prospectus, or any response to any comment letter, without the prior written consent of such Holder or Underwriter and providing each such Holder or Underwriter a reasonable amount of time to review and comment on such applicable document, which comments the Company shall include unless contrary to applicable law;

3.1.11    obtain a “cold comfort” letter from the Company’s independent registered public accounting firm in the event of an Underwritten Registration, in customary form and covering such matters of the type customarily covered by “cold comfort” letters as the managing Underwriters may reasonably request, and reasonably satisfactory to a majority-in-interest of the participating Holders;

3.1.12    on the date the Registrable Securities are delivered for sale pursuant to such Registration, obtain an opinion, dated such date, of counsel representing the Company for the purposes of such Registration, addressed to the Holders, the placement agent or sales agent, if any, and the Underwriters, if any, covering such legal matters with respect to the Registration in respect of which such opinion is being given as the Holders, placement agent, sales agent or Underwriter may reasonably request and as are customarily included in such opinions and negative assurance letters, and reasonably satisfactory to a majority in interest of the participating Holders;

3.1.13    in the event of any Underwritten Offering, enter into and perform its obligations under an underwriting agreement, in usual and customary form, with the managing Underwriter of such offering;

3.1.14    make available to its security holders, as soon as reasonably practicable, an earnings statement covering the period of at least twelve (12) months beginning with the first day of the Company’s first full calendar quarter after the effective date of the Registration Statement which satisfies the provisions of Section 11(a) of the Securities Act and Rule 158 thereunder (or any successor rule promulgated thereafter by the Commission);

3.1.15    if the Registration involves the Registration of Registrable Securities involving gross proceeds in excess of $25,000,000, use its reasonable efforts to make available senior executives of the Company to participate in customary “road show” presentations that may be reasonably requested by the Underwriters in any Underwritten Offering; and

3.1.16    otherwise, in good faith, cooperate reasonably with, and take such customary actions as may reasonably be requested by the Holders, in connection with such Registration, including making available senior executives of the Company to participate in any due diligence sessions that may be reasonably requested by the Underwriters in any Underwritten Offering.

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3.2.    Registration Expenses. The Registration Expenses of all Registrations shall be borne by the Company. It is acknowledged by the Holders that the Holders shall bear all incremental selling expenses relating to the sale of Registrable Securities, such as Underwriters’ commissions and discounts, brokerage fees, marketing costs and, other than as set forth in the definition of “Registration Expenses,” all reasonable fees and expenses of any legal counsel representing the Holders.

3.3.    Requirements for Participation in Underwritten Offerings. No person may participate in any Underwritten Offering for equity securities of the Company pursuant to a Registration initiated by the Company hereunder unless such person (i) agrees to sell such person’s securities on the basis provided in any underwriting arrangements approved by the Company and (ii) completes and executes all customary questionnaires, powers of attorney, indemnities, lock-up agreements, underwriting agreements and other customary documents as may be reasonably required under the terms of such underwriting arrangements.

3.4.    Suspension of Sales; Adverse Disclosure. Upon receipt of written notice from the Company that a Registration Statement or Prospectus contains a Misstatement, each of the Holders shall forthwith discontinue disposition of Registrable Securities pursuant to such Registration Statement or Prospectus until he, she or it has received copies of a supplemented or amended Prospectus correcting the Misstatement (it being understood that the Company hereby covenants to prepare and file such supplement or amendment as soon as practicable after the time of such notice), or until he, she or it is advised in writing by the Company that the use of the Prospectus may be resumed. If the filing, initial effectiveness or continued use of a Registration Statement in respect of any Registration at any time would require the Company to make an Adverse Disclosure or would require the inclusion in such Registration Statement of financial statements that are unavailable to the Company for reasons beyond the Company’s control, the Company may, upon giving prompt written notice of such action to the Holders, delay the filing or initial effectiveness of, or suspend use of, such Registration Statement for the shortest period of time, but in no event more than thirty (30) days, determined in good faith by the Company to be necessary for such purpose. In the event the Company exercises its rights under the preceding sentence, each Holder, severally and not jointly, agrees with the Company to suspend, immediately upon their receipt of the notice referred to above, their use of the Prospectus relating to any Registration in connection with any sale or offer to sell Registrable Securities. The Company shall immediately notify the Holders of the expiration of any period during which it exercised its rights under this Section 3.4.

3.5.    Reporting Obligations. As long as any Holder shall own Registrable Securities, the Company, at all times while it shall be a reporting company under the Exchange Act, covenants to file timely (or obtain extensions in respect thereof and file within the applicable grace period) all reports required to be filed by the Company after the date hereof pursuant to Sections 13(a) or 15(d) of the Exchange Act and to promptly furnish the Holders with true and complete copies of all such filings. The Company further covenants that it shall take such further action as any Holder may reasonably request, all to the extent required from time to time to enable such Holder to sell shares of Common Stock held by such Holder without registration under the Securities Act within

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the limitation of the exemptions provided by Rule 144 promulgated under the Securities Act (or any successor rule promulgated thereafter by the Commission), including providing any legal opinions. Upon the request of any Holder, the Company shall deliver to such Holder a written certification of a duly authorized officer as to whether it has complied with such requirements.

3.6.    Legend Removal. If:

(a)

(i)     the distribution, pledge, sale or other transfer of Registrable Securities is registered pursuant to an effective registration statement under the Securities Act; or

(ii)     the Registrable Securities may be sold without restriction under Rule 144; and

(b)     a Holder has sold or transferred, or proposes to sell or transfer, Registrable Securities pursuant to an effective registration statement or Rule 144; and

(c)     the Company, its counsel or the Transfer Agent have received customary representations and other documentation from a Holder that is reasonably necessary to establish that restrictive legends are no longer required as reasonably requested by the Company, its counsel or the Transfer Agent,

then, if requested by Holder, the Company shall (x) cause the removal of any restrictive legend set forth on the Registrable Securities and (y) issue Registrable Securities without any such legend in book-entry form or by electronic delivery through DTC, at the Holder’s option, within two (2) Business Days of such request.

ARTICLE IV

INDEMNIFICATION AND CONTRIBUTION

4.1.    Indemnification.

4.1.1    The Company agrees to indemnify, to the extent permitted by law, each Holder of Registrable Securities, its officers and directors and each person who controls such Holder (within the meaning of the Securities Act) against all losses, claims, damages, liabilities and expenses (including attorneys’ fees) caused by any untrue or alleged untrue statement of material fact contained in any Registration Statement, Prospectus or preliminary Prospectus or any amendment thereof or supplement thereto or any omission or alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, except insofar as the same are caused by or contained in any information furnished in writing to the Company by such Holder expressly for use therein. The Company shall indemnify the Underwriters and any person who may be deemed an underwriter (within the meaning of the Securities Act) in connection with any Registration Statement hereunder, their respective officers and directors and each person who controls (within the meaning of the Securities Act) such persons to the same extent as provided in the foregoing with respect to the indemnification of the Holder.

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4.1.2    In connection with any Registration Statement in which a Holder of Registrable Securities is participating, such Holder shall furnish to the Company in writing such information and affidavits as the Company reasonably requests for use in connection with any such Registration Statement or Prospectus and, to the extent permitted by law, agrees with the Company that the Holder shall indemnify the Company, its directors and officers and agents and each person who controls the Company (within the meaning of the Securities Act) against any losses, claims, damages, liabilities and expenses (including without limitation reasonable attorneys’ fees) resulting from any untrue statement of material fact contained in the Registration Statement, Prospectus or preliminary Prospectus or any amendment thereof or supplement thereto or any omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, but only to the extent that such untrue statement or omission is contained in any information or affidavit so furnished in writing by such Holder expressly for use therein; provided, however, that the obligation to indemnify shall be several, not joint and several, among such Holders of Registrable Securities, and the liability of each such Holder of Registrable Securities shall be in proportion to and limited to the net proceeds received by such Holder from the sale of Registrable Securities pursuant to such Registration Statement. Each participating Holder of Registrable Securities agrees with the Company that the Holder shall indemnify the Underwriters, their respective officers, directors and each person who controls the Underwriters (within the meaning of the Securities Act) to the same extent as provided in the foregoing with respect to indemnification of the Company.

4.1.3    Any person entitled to indemnification herein shall (i) give prompt written notice to the indemnifying party of any claim with respect to which it seeks indemnification; provided, however, that the failure to give prompt notice shall not impair any person’s right to indemnification hereunder to the extent such failure has not materially prejudiced the indemnifying party, and (ii) unless in such indemnified party’s reasonable judgment a conflict of interest between such indemnified and indemnifying parties may exist with respect to such claim, permit such indemnifying party to assume the defense of such claim with counsel reasonably satisfactory to the indemnified party. If such defense is assumed, the indemnifying party shall not be subject to any liability for any settlement made by the indemnified party without its consent (but such consent shall not be unreasonably withheld). An indemnifying party who is not entitled to, or elects not to, assume the defense of a claim shall not be obligated to pay the fees and expenses of more than one (1) counsel (plus local counsel) for all parties indemnified by such indemnifying party with respect to such claim, unless in the reasonable judgment of any indemnified party a conflict of interest may exist between such indemnified party and any other of such indemnified parties with respect to such claim. No indemnifying party shall, without the consent of the indemnified party, consent to the entry of any judgment or enter into any settlement unless such settlement, compromise or judgment (A) includes an unconditional release of the indemnified party from all liability arising out of such action or claim, (B) does not include a statement as to or an admission of fault, culpability or a failure to act, by or on behalf of any indemnified party and (C) does not require any action other than the payment of money by the indemnifying party.

4.1.4    The indemnification provided for under this Agreement shall remain in full force and effect regardless of any investigation made by or on behalf of the indemnified party or any officer, director or controlling person of such indemnified party and shall survive the transfer of securities. The Company and each Holder of Registrable Securities participating in an offering also agrees to make such provisions as are reasonably requested by any indemnified party for contribution to such party in the event the Company’s or such Holder’s indemnification is unavailable for any reason.

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4.1.5    If the indemnification provided under Section 4.1 from the indemnifying party is unavailable or insufficient to hold harmless an indemnified party in respect of any losses, claims, damages, liabilities and expenses referred to herein, then the indemnifying party, in lieu of indemnifying the indemnified party, shall contribute to the amount paid or payable by the indemnified party as a result of such losses, claims, damages, liabilities and expenses in such proportion as is appropriate to reflect the relative fault of the indemnifying party and the indemnified party, as well as any other relevant equitable considerations. The relative fault of the indemnifying party and indemnified party shall be determined by reference to, among other things, whether any action in question, including any untrue or alleged untrue statement of a material fact or omission or alleged omission to state a material fact, was made by, or relates to information supplied by, such indemnifying party or indemnified party, and the indemnifying party’s and indemnified party’s relative intent, knowledge, access to information and opportunity to correct or prevent such action; provided, however, that the liability of any Holder under this subsection 4.1.5 shall be limited to the amount of the net proceeds received by such Holder in such offering giving rise to such liability. The amount paid or payable by a party as a result of the losses or other liabilities referred to above shall be deemed to include, subject to the limitations set forth in subsections 4.1.1, 4.1.2 and 4.1.3, any legal or other fees, charges or expenses reasonably incurred by such party in connection with any investigation or proceeding. The parties hereto agree that it would not be just and equitable if contribution pursuant to this subsection 4.1.5 were determined by pro rata allocation or by any other method of allocation, which does not take account of the equitable considerations referred to in this subsection 4.1.5. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution pursuant to this subsection 4.1.5 from any person who was not guilty of such fraudulent misrepresentation.

ARTICLE V

MISCELLANEOUS

5.1.    Notices. Any notice or communication under this Agreement must be in writing and given by (i) deposit in the United States mail, addressed to the party to be notified, postage prepaid and registered or certified with return receipt requested, (ii) delivery in person or by courier service providing evidence of delivery or (iii) transmission by hand delivery, electronic mail or facsimile. Each notice or communication that is mailed, delivered or transmitted in the manner described above shall be deemed sufficiently given, served, sent and received, in the case of mailed notices, on the third (3) business day following the date on which it is mailed and, in the case of notices delivered by courier service, hand delivery, electronic mail or facsimile, at such time as it is delivered to the addressee (with the delivery receipt or the affidavit of messenger) or at such time as delivery is refused by the addressee upon presentation. Any notice or communication under this Agreement must be addressed, if to the Company, to: 99 Wall Street, #5801, New York, New York 10005; Attention: Peter Bordes and Michael E.S. Frankel. Any party may change its address for notice at any time and from time to time by written notice to the other parties hereto, and such change of address shall become effective thirty (30) days after delivery of such notice as provided in this Section 5.1.

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5.2.    Assignment; No Third Party Beneficiaries.

5.2.1    This Agreement and the rights, duties and obligations of the Company hereunder may not be assigned or delegated by the Company in whole or in part.

5.2.2    Prior to the expiration of the Founder Shares Lock-Up Period or the Private Placement Lock-Up Period, as the case may be, no Holder may assign or delegate such Holder’s rights, duties or obligations under this Agreement, in whole or in part, except in connection with a transfer of Registrable Securities by such Holder to a Permitted Transferee who agrees to become bound by this Agreement. Thereafter, a Holder may assign or delegate such Holder’s rights, duties or obligations under this Agreement, in whole or in part, to a Permitted Transferee who agrees to become bound by this Agreement.

5.2.3    This Agreement and the provisions hereof shall be binding upon and shall inure to the benefit of each of the parties and its successors and the permitted assigns of the Holders, which shall include Permitted Transferees.

5.2.4    This Agreement shall not confer any rights or benefits on any persons that are not parties hereto, other than as expressly set forth in this Agreement and Section 5.2.

5.2.5    No assignment by any party hereto of such party’s rights, duties and obligations hereunder shall be binding upon or obligate the Company unless and until the Company shall have received (i) written notice of such assignment as provided in Section 5.1 and (ii) the written agreement of the assignee, in a form reasonably satisfactory to the Company, to be bound by the terms and provisions of this Agreement (which may be accomplished by an addendum or certificate of joinder to this Agreement). Any transfer or assignment made other than as provided in this Section 5.2 shall be null and void.

5.3.    Severability. This 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 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 Agreement a provision as similar in terms to such invalid or unenforceable provision as may be possible that is valid and enforceable.

5.4.    Counterparts. This Agreement may be executed in multiple counterparts (including facsimile or PDF counterparts), each of which shall be deemed an original, and all of which together shall constitute the same instrument, but only one of which need be produced.

5.5.    Relationship of the Parties. For ease of administration, this Agreement is being executed so as to enable each Holder identified on the signature pages to enter into this Agreement, severally, but not jointly. The Company and each Holder agree with each other that (i) this Agreement shall be treated as if it were a separate agreement with respect to each Holder listed on the signature page, as if each Holder had executed a separate registration rights agreement naming only itself as a Holder, and (ii) no Holder listed on the signature page shall have any liability under this Agreement for the obligations of any other Holder so listed. The decision of each Holder to enter into this Agreement has been made by such Holder independently of any other Holder. Nothing contained herein, and no action taken by a Holder pursuant hereto or thereto, shall be

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deemed to constitute any Holder acting with any other Holder or Holders as a partnership, an association, a joint venture or any other kind of entity, or create a presumption that any Holder and any other Holder or Holders are in any way acting in concert or as a group with respect to such obligations or the transactions contemplated by this Agreement.

5.6.    Entire Agreement. This Agreement, including all agreements entered into pursuant hereto and all certificates and instruments delivered pursuant hereto and thereto, constitutes the entire agreement of the parties with respect to the subject matter hereof and supersedes all prior and contemporaneous agreements, representations, understandings, negotiations and discussions between the parties, whether oral or written.

5.7.    Governing Law; Venue. NOTWITHSTANDING THE PLACE WHERE THIS AGREEMENT MAY BE EXECUTED BY ANY OF THE PARTIES HERETO, THE PARTIES EXPRESSLY AGREE THAT (I) THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED UNDER THE LAWS OF THE STATE OF NEW YORK AS APPLIED TO AGREEMENTS AMONG NEW YORK RESIDENTS ENTERED INTO AND TO BE PERFORMED ENTIRELY WITHIN NEW YORK, WITHOUT REGARD TO THE CONFLICT OF LAW PROVISIONS OF SUCH JURISDICTION AND (II) THE VENUE FOR ANY ACTION TAKEN WITH RESPECT TO THIS AGREEMENT SHALL BE ANY STATE OR FEDERAL COURT IN NEW YORK COUNTY IN THE STATE OF NEW YORK.

EACH PARTY HERETO ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND, THEREFORE, EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT TO ANY ACTION DIRECTLY OR INDIRECTLY ARISING OUT OF, UNDER OR IN CONNECTION WITH OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT.

5.8.    Amendments and Modifications. Upon the written consent of the Company and the Holders of at least fifty percent (50%) of the Registrable Securities at the time in question, compliance with any of the provisions, covenants and conditions set forth in this Agreement may be waived, or any of such provisions, covenants or conditions may be amended or modified; provided, however, that, notwithstanding the foregoing, any amendment hereto or waiver hereof that adversely affects a Holder, solely in his, her or its capacity as a holder of the shares of capital stock of the Company, in a manner that is materially disproportionate to the other Holders (in such capacity) shall require the consent of such Holder so affected. No course of dealing between any Holder or the Company and any other party hereto or any failure or delay on the part of a Holder or the Company in exercising any rights or remedies under this Agreement shall operate as a waiver of any rights or remedies of any Holder or the Company. No single or partial exercise of any rights or remedies under this Agreement by a party shall operate as a waiver or preclude the exercise of any other rights or remedies hereunder or thereunder by such party.

5.9.    Titles and Headings. Titles and headings of sections of this Agreement are for convenience only and shall not affect the construction of any provision of this Agreement.

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5.10.    Waivers and Extensions. Any party to this Agreement may waive any right, breach or default which such party has the right to waive; provided, however, that such waiver shall not be effective against the waiving party unless it is in writing, is signed by such party and specifically refers to this Agreement. Waivers may be made in advance or after the right waived has arisen or the breach or default waived has occurred. Any waiver may be conditional. No waiver of any breach of any agreement or provision herein contained shall be deemed a waiver of any preceding or succeeding breach thereof nor of any other agreement or provision herein contained. No waiver or extension of time for performance of any obligations or acts shall be deemed a waiver or extension of the time for performance of any other obligations or acts.

5.11.    Remedies Cumulative. In the event that the Company fails to observe or perform any covenant or agreement to be observed or performed under this Agreement, the Holders may proceed to protect and enforce its rights by suit in equity or action at law, whether for specific performance of any term contained in this Agreement or for an injunction against the breach of any such term or in aid of the exercise of any power granted in this Agreement or to enforce any other legal or equitable right, or to take any one or more of such actions, without being required to post a bond. None of the rights, powers or remedies conferred under this Agreement shall be mutually exclusive, and each such right, power or remedy shall be cumulative and in addition to any other right, power or remedy, whether conferred by this Agreement or now or hereafter available at law, in equity, by statute or otherwise.

5.12.    Other Registration Rights. The Company represents and warrants that no person, other than a Holder of Registrable Securities, has any right to require the Company to register any securities of the Company for sale or to include such securities of the Company in any Registration filed by the Company for the sale of securities for its own account or for the account of any other person. Further, the Company represents and warrants that this Agreement supersedes any other registration rights agreement or agreement with similar terms and conditions and in the event of a conflict between any such agreement or agreements and this Agreement, the terms of this Agreement shall prevail.

5.13.    Term. This Agreement shall terminate upon the earlier of (i) the tenth (10^th) anniversary of the date of this Agreement or (ii) the date as of which (A) all of the Registrable Securities have been sold pursuant to a Registration Statement (but in no event prior to the applicable period referred to in Section 4(a)(3) of the Securities Act and Rule 174 thereunder (or any successor rule promulgated thereafter by the Commission)) or (B) the Holders of all Registrable Securities are permitted to sell the Registrable Securities under Rule 144 (or any similar provision) under the Securities Act without limitation on the amount of securities sold or the manner of sale. The provisions of Section 3.5 and Article IV shall survive any termination.

5.14.    Holder Information. Each Holder agrees, if requested in writing, to represent to the Company the total number of Registrable Securities held by such Holder in order for the Company to make determinations hereunder.

[SIGNATURE PAGES FOLLOW]

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IN WITNESS WHEREOF, the undersigned have caused this Agreement to be executed as of the date first written above.

[Signature Page to Registration Rights Agreement—C5 Acquisition Corporation]

Exhibit 10.4

EXECUTION VERSION

PRIVATE PLACEMENT WARRANTS PURCHASE AGREEMENT

THIS PRIVATE PLACEMENT WARRANTS PURCHASE AGREEMENT, dated as of January 6, 2022 (as amended, supplemented or otherwise modified from time to time, this “Agreement”), is entered into by and between C5 Acquisition Corporation, a Delaware corporation (the “Company”), and C5 Sponsor 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, par value $0.0001 per share (each, a “Share”), and one-half of one redeemable warrant, each whole warrant exercisable for 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 (the “SEC”), File No. 333-261249 (the “Registration Statement”), under the Securities Act of 1933, as amended (the “Securities Act”); and

WHEREAS, the Purchaser now wishes to purchase, at a price of $1.00 per warrant, an aggregate of 13,035,500 private placement warrants (or up to 15,535,500 private placement warrants, depending on the extent to which the underwriters exercise their option to purchase additional units) (the “Private Placement Warrants”), 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 Warrants.

A.    Authorization of the Private Placement Warrants. The Company has duly authorized the issuance and sale of the Private Placement Warrants to the Purchaser.

B.    Purchase and Sale of the Private Placement Warrants.

(i)    On the date of the consummation of the Public Offering, the Company shall issue and sell to the Purchaser, and the Purchaser shall purchase from the Company, 13,035,500 Private Placement Warrants (the “Initial Private Placement Warrants”) at a price of $1.00 per Private Placement Warrant for an aggregate purchase price of $13,035,500 (the “Purchase Price”). The Purchaser shall pay the Purchase Price by wire transfer of immediately available funds in accordance with the Company’s wiring instructions at least one (1) business day prior to the effective date of the Registration Statement, or on such other date as the Company and the Purchaser may agree.

(ii)    In the event that the underwriters’ option to purchase additional units is exercised in full, the Purchaser shall purchase up to an additional 1,500,000 Private Placement Warrants (the “Additional Private Placement Warrants”), in the same proportion as the amount of the option to purchase additional units that is exercised and, simultaneously with such purchase of Additional Private Placement Warrants, as payment in full for the Additional Private Placement Warrants being purchased hereunder, and at least one (1) business day prior to the closing of all or any portion of the option to purchase additional units, or on such other date as the Company and the Purchaser may agree, the Purchaser shall pay $1.00 per Additional Private Placement Warrant, up to an aggregate amount of $1,500,000, by wire transfer of immediately available funds in accordance with the Company’s wiring instructions.

(iii)    The closing of the purchase and sale of the Initial Private Placement Warrants shall take place simultaneously with the closing of the Public Offering (the “Initial Closing Date”). The closing of the purchase and sale of the Additional Private Placement Warrants, if applicable, shall take place simultaneously with the closing of all or any portion of the option to purchase additional units (such closing date, together with the Initial Closing Date, the “Closing Dates” and, each, a “Closing Date”). The closing of the purchase and sale of each of the Initial Private Placement Warrants and the Additional Private Placement Warrants shall take place at the offices of Paul, Weiss, Rifkind, Wharton & Garrison LLP, 1285 Avenue of the Americas, New York, New York, 10019, or such other place as may be agreed upon by the parties hereto.

C.    Terms of the Private Placement Warrants.

(i)    Each Private Placement Warrant shall have the terms set forth in that certain private warrant agreement to be entered into by the Company and a warrant agent in connection with the Public Offering (the “Private Warrant Agreement”) and shall be subject to the terms of that certain letter agreement to be entered into by the Company, the Purchaser and the other parties thereto in connection with the Public Offering.

(ii)    At or prior to the Initial Closing Date, the Company and the Purchaser shall enter into that certain 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 Warrants and the Shares underlying the Private Placement Warrants.

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 Warrants, the Company hereby represents and warrants to the Purchaser (which representations and warranties shall survive the Closing Dates) 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, results of operations 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 Private Warrant Agreement.

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B.    Authorization; No Breach.

(i)    The execution, delivery and performance of this Agreement and the Private Placement Warrants have been duly authorized by the Company as of the applicable Closing Date. This Agreement constitutes a 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 Private Warrant Agreement and this Agreement, the Private Placement Warrants will constitute valid and binding obligations of the Company, enforceable in accordance with their terms as of the applicable Closing Date.

(ii)    The execution and delivery by the Company of this Agreement and the Private Placement Warrants, the issuance and sale of the Private Placement Warrants, the issuance of 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 the applicable 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 capital stock 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 certificate of incorporation or the bylaws of the Company (in effect on the date hereof or as may be amended prior to completion of the Public Offering), 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, the Private Warrant Agreement and the Company’s amended and restated certificate of incorporation, the Shares issuable upon exercise of the Private Placement Warrants will be duly and validly issued, fully paid and non-assessable. On the date of issuance of the Private Placement Warrants, the Shares issuable upon exercise of the Private Placement Warrants shall have been reserved for issuance in accordance with the terms of this Agreement. Upon issuance in accordance with, and payment pursuant to, the terms hereof and the Private Warrant Agreement, the Purchaser will have good title to the Private Placement Warrants purchased by it and the Shares issuable upon exercise of such 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. No permit, consent, approval or authorization of, or declaration to or filing with, any governmental authority is required in connection with the execution, delivery and performance by the Company of this Agreement or the consummation by the Company of any other transactions contemplated hereby.

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E.    Regulation D Qualification. Neither the Company nor, to its knowledge, any of its affiliates, officers, directors or beneficial stockholders of twenty percent (20%) or more of its outstanding securities, has experienced a disqualifying event as enumerated pursuant to Rule 506(d) of Regulation D under the Securities Act.

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 Warrants to the Purchaser, the Purchaser hereby represents and warrants to the Company (which representations and warranties shall survive the Closing Dates) 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 does not and shall not as of the applicable 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 certificate of formation or the limited liability company agreement of the Purchaser (in effect on the date hereof or as may be amended prior to completion of the 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 Warrants and, upon exercise of the Private Placement Warrants, the Shares issuable upon such exercise (collectively, the “Securities”), for the Purchaser’s 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 under the Securities Act 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

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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.

(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 and (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. In this regard, the Purchaser understands that the SEC has taken the position that the promoters or affiliates of a blank check company and their transferees, both before and after an initial Business Combination, are deemed to be “underwriters” under the Securities Act when reselling the securities of a blank check company. Based on that position, Rule 144 promulgated under to the Securities Act would not be available for resale transactions of the Securities despite technical compliance with the requirements of Rule 144 promulgated under to the Securities Act, and the Securities can be resold only through a registered offering or in reliance upon another exemption from the registration requirements of the Securities Act.

(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.

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(ix)    The Purchaser understands that the Private Placement Warrants shall bear the legend substantially in the form set forth in the Private Warrant Agreement.

Section 4.    Conditions of the Purchaser’s Obligations. The obligations of the Purchaser to purchase and pay for the Private Placement Warrants are subject to the fulfillment, on or before the Closing Dates, 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 the applicable 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 the applicable Closing Date.

C.    Corporate Consents. The Company shall have obtained the consent of the Company’s board of directors authorizing the execution, delivery and performance of this Agreement and the Private Warrant Agreement and the issuance and sale of the Private Placement Warrants 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 Private Warrant Agreement.

E.    Private Warrant Agreement and Registration Rights Agreement. The Company shall have entered into the Private Warrant Agreement with a warrant agent 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 the applicable 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 the applicable 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 the applicable 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 Private Warrant Agreement.

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D.    Private Warrant Agreement. The Company shall have entered into the Private Warrant Agreement with a warrant agent.

Section 6.    Termination. This Agreement may be terminated by the Company or the Purchaser at any time after December 31, 2022 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 the applicable 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 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. A signed copy of this Agreement delivered by facsimile, electronic mail or other means of electronic transmission shall be deemed to have the same legal effect as delivery of an original signed copy of this Agreement.

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 and the rights and obligations of the parties hereunder shall be construed in accordance with and governed by the laws of New York applicable to contracts wholly performed within the borders of such state, without giving effect to the conflict of law principles thereof. The parties hereto irrevocably submit to the exclusive jurisdiction of any federal court sitting in the Southern District of New York or any state court located in New York County, State of New York, over any suit, action or proceeding arising out of or relating to this Agreement. To the fullest extent they may effectively do so under applicable law, the parties hereto

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irrevocably waive and agree not to assert, by way of motion, as a defense or otherwise, any claim that they are not subject to the jurisdiction of any such court, any objection that they may now or hereafter have to the laying of the venue of any such suit, action or proceeding brought in any such court and any claim that any such suit, action or proceeding brought in any such court has been brought in an inconvenient forum.

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.

[Signature Page to Private Placement Warrants Purchase Agreement—C5 Acquisition Corporation]

Exhibit 10.5

EXECUTION VERSION

INDEMNITY AGREEMENT

THIS INDEMNITY AGREEMENT is made as of January 6, 2022 (as amended, supplemented or otherwise modified from time to time, this “Agreement”), by and between C5 Acquisition Corporation, a Delaware corporation (the “Company”), and Steven J. Demetriou (“Indemnitee”).

RECITALS

WHEREAS, the board of directors of the Company (the “Board”) has determined that it is reasonable, prudent and necessary for the Company to obligate itself contractually to indemnify, hold harmless, exonerate and to advance expenses on behalf of persons who serve the Company to the fullest extent permitted by applicable law;

WHEREAS, this Agreement is a supplement to, and in furtherance of, the amended and restated certificate of incorporation of the Company (as further amended, supplemented or otherwise modified from time to time, the “Charter”) and the bylaws of the Company (as amended, supplemented or otherwise modified from time to time, the “Bylaws”) and any resolutions adopted pursuant thereto and shall not be deemed a substitute therefor, nor to diminish or abrogate any rights of Indemnitee thereunder; and

WHEREAS, Indemnitee may not be willing to serve as an officer or director or in another capacity without adequate protection, and the Company desires Indemnitee to serve in such capacity. Indemnitee is willing to serve, continue to serve and to take on additional service for or on behalf of the Company on the condition that Indemnitee be so indemnified.

NOW, THEREFORE, IN CONSIDERATION OF the premises and the covenants contained herein and subject to the provisions of that certain letter agreement, dated as of January 6, 2022, as amended, supplemented or otherwise modified from time to time, the Company and Indemnitee do hereby covenant and agree as follows:

TERMS AND CONDITIONS

1.    SERVICES TO THE COMPANY. In consideration of the Company’s covenants and obligations hereunder, Indemnitee will serve or continue to serve as an officer, director, key employee or in any other capacity of the Company, as applicable, for so long as Indemnitee is duly elected or appointed or until Indemnitee tenders Indemnitee’s resignation or until Indemnitee is removed. Notwithstanding the foregoing, this Agreement shall continue in full force and effect after Indemnitee has ceased to serve as a director, officer, key employee or in any other capacity of the Company as provided in Section 17. This Agreement shall not impose any obligation on Indemnitee or the Company to continue Indemnitee’s service to the Company beyond any period otherwise required by law or by other agreements or commitments of the parties, if any.

2.    DEFINITIONS. As used in this Agreement:

(a)    “Agent” shall mean any person who is or was a director, officer or employee of the Company or a subsidiary of the Company or other person authorized by the Company to act for the Company, to include such person serving in such capacity as a director, officer, employee, fiduciary or other official of another corporation, partnership, limited liability company, joint venture, trust or other enterprise at the request of, for the convenience of, or to represent the interests of the Company or a subsidiary of the Company.

(b)    “Beneficial Owner” and “Beneficial Ownership” shall have the meanings set forth in Rule 13d-3 promulgated under the Exchange Act (as defined below) as in effect on the date hereof.

(c)    “Change in Control” shall be deemed to occur upon the earliest to occur after the date of this Agreement of any of the following events:

(i)    Acquisition of Stock by Third Party. Other than an affiliate of C5 Sponsor LLC (the “Sponsor”), any Person (as defined below) is or becomes the Beneficial Owner, directly or indirectly, of securities of the Company representing fifteen percent (15%) or more of the combined voting power of the Company’s then outstanding securities entitled to vote generally in the election of directors, unless (1) the change in the relative Beneficial Ownership of the Company’s securities by any Person results solely from a reduction in the aggregate number of outstanding shares of securities entitled to vote generally in the election of directors, or (2) such acquisition was approved in advance by the Continuing Directors (as defined below) and such acquisition would not constitute a Change in Control under clause (iii) of this definition;

(ii)    Change in Board of Directors. Individuals who, as of the date of this Agreement, constitute the Board, and any new director whose appointment by the Board or nomination for election by the Company’s stockholders was approved by a vote of at least two-thirds of the directors then still in office who were directors on the date of this Agreement or whose appointment or nomination for election was previously so approved (collectively, the “Continuing Directors”), cease for any reason to constitute a majority of the members of the Board;

(iii)    Corporate Transactions. The effective date of a merger, consolidation, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination, involving the Company and one or more businesses or entities (a “Business Combination”), in each case, unless, following such Business Combination (1) all or substantially all of the individuals and entities who were the Beneficial Owners of securities of the Company entitled to vote generally in the election of directors immediately prior to such Business Combination beneficially own, directly or indirectly, more than fifty-one percent (51%) of the combined voting power of the then outstanding securities of the Company or the surviving or resulting entity or the ultimate parent entity that controls such surviving or resulting entity (the “Successor”) entitled to vote generally in the election of directors of the Successor (including a corporation

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which as a result of such transaction owns the Company or all or substantially all of the Company’s assets either directly or through one or more Subsidiaries (as defined below)) in substantially the same proportions as their ownership immediately prior to such Business Combination, of the securities entitled to vote generally in the election of directors, (2) other than an affiliate of the Sponsor, no Person (excluding any corporation resulting from such Business Combination) is the Beneficial Owner, directly or indirectly, of fifteen percent (15%) or more of the combined voting power of the then outstanding securities entitled to vote generally in the election of directors of the Successor except to the extent that such Person was the Beneficial Owner, directly or indirectly, of fifteen percent (15%) or more of the combined voting power of the Company prior to such Business Combination and (3) a majority of the board of directors (or comparable governing body) of the Successor were Continuing Directors at the time of the execution of the initial agreement, or of the action of the Board of Directors, providing for such Business Combination;

(iv)    Liquidation. The approval by the stockholders of the Company of a complete liquidation of the Company or an agreement or series of agreements for the sale or disposition by the Company of all or substantially all of the Company’s assets, other than factoring the Company’s current receivables or escrows due (or, if such stockholder approval is not required, the decision by the Board to proceed with such a liquidation, sale or disposition in one transaction or a series of related transactions); or

(v)    Other Events. There occurs any other event of a nature that would be required to be reported in response to Item 6(e) of Schedule 14A of Regulation 14A (or any successor rule) (or a response to any similar item on any similar schedule or form) promulgated under the Exchange Act (as defined below), whether or not the Company is then subject to such reporting requirement.

(d)    “Corporate Status” shall mean the status of a Person who is or was a director, officer, trustee, general partner, manager, managing member, fiduciary, employee or agent of the Company or of any other Enterprise (as defined below) which such person is or was serving at the request of the Company.

(e)    “Delaware Court” shall mean the Court of Chancery of the State of Delaware.

(f)    “Disinterested Director” shall mean a director of the Company who is not and was not a party to the Proceeding (as defined below) in respect of which indemnification is sought by Indemnitee.

(g)    “Enterprise” shall mean the Company and any other corporation, constituent corporation (including any constituent of a constituent) absorbed in a consolidation or merger to which the Company (or any of its wholly owned subsidiaries) is a party, limited liability company, partnership, joint venture, trust, employee benefit plan or other enterprise of which Indemnitee is or was serving at the request of the Company as a director, officer, trustee, general partner, managing member, fiduciary, employee or agent.

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(h)    “Exchange Act” shall mean the Securities Exchange Act of 1934, as amended.

(i)    “Expenses” shall include all direct and indirect costs, fees and expenses of any type or nature whatsoever, including all reasonable attorneys’ fees and costs, retainers, court costs, transcript costs, fees of experts, witness fees, travel expenses, fees of private investigators and professional advisors, duplicating costs, printing and binding costs, telephone charges, postage, delivery service fees, fax transmission charges, secretarial services and all other disbursements, obligations or expenses in connection with prosecuting, defending, preparing to prosecute or defend, investigating, being or preparing to be a witness in, settlement or appeal of, or otherwise participating in, a Proceeding (as defined below), including reasonable compensation for time spent by Indemnitee for which he or she is not otherwise compensated by the Company or any third party. Expenses also shall include Expenses incurred in connection with any appeal resulting from any Proceeding (as defined below), including the principal, premium, security for and other costs relating to any cost bond, supersedeas bond or other appeal bond or its equivalent. Notwithstanding the foregoing, “Expenses” shall not include amounts paid in settlement by Indemnitee or the amount of judgments or fines against Indemnitee.

(j)    “Fines” shall include any excise tax assessed on Indemnitee with respect to any employee benefit plan.

(k)    “Independent Counsel” shall mean a law firm or a member of a law firm with significant experience in matters of corporation law and that neither presently is, nor in the past five years has been, retained to represent (i) the Company or Indemnitee in any matter material to either such party (other than with respect to matters concerning Indemnitee under this Agreement or of other indemnitees under similar indemnification agreements) or (ii) any other party to the Proceeding (as defined below) giving rise to a claim for indemnification hereunder. Notwithstanding the foregoing, “Independent Counsel” shall not include any person who, under the applicable standards of professional conduct then prevailing, would have a conflict of interest in representing either the Company or Indemnitee in an action to determine Indemnitee’s rights under this Agreement.

(l)    Indemnitee shall be deemed to have acted in a manner “not opposed to the best interests of the Company” if Indemnitee acted in good faith and in a manner Indemnitee reasonably believed to be in the best interests of the participants and beneficiaries of an employee benefit plan.

(m)    “Person” shall have the meaning as set forth in Sections 13(d) and 14(d) of the Exchange Act as in effect on the date hereof; provided, however, that “Person” shall exclude (i) the Company, (ii) any Subsidiaries (as defined below) of the Company, (iii) any employment benefit plan of the Company or of a Subsidiary (as defined below) of the Company or of any corporation owned, directly or indirectly, by the stockholders of the

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Company in substantially the same proportions as their ownership of stock of the Company and (iv) any trustee or other fiduciary holding securities under an employee benefit plan of the Company or of a Subsidiary (as defined below) of the Company or of a corporation owned directly or indirectly by the stockholders of the Company in substantially the same proportions as their ownership of stock of the Company.

(n)    “Proceeding” shall include any threatened, pending or completed action, suit, arbitration, mediation, alternate dispute resolution mechanism, investigation, inquiry, administrative hearing or any other actual, threatened or completed proceeding, whether brought in the right of the Company or otherwise and whether of a civil (including intentional or unintentional tort claims), criminal, administrative or investigative or related nature, in which Indemnitee was, is, will or might be involved as a party or otherwise by reason of the fact that Indemnitee is or was a director or officer of the Company, by reason of any action (or failure to act) taken by Indemnitee or of any action (or failure to act) on Indemnitee’s part while acting as a director or officer of the Company, or by reason of the fact that Indemnitee is or was serving at the request of the Company as a director, officer, trustee, general partner, managing member, fiduciary, employee or agent of any other Enterprise, in each case, whether or not serving in such capacity at the time any liability or expense is incurred for which indemnification, reimbursement or advancement of expenses can be provided under this Agreement but shall not include any Enforcement Proceeding pursuant to Section 14.

(o)    “Serving at the request of the Company” shall include any service as a director, officer, employee, agent or fiduciary of the Company which imposes duties on, or involves services by, such director, officer, employee, agent or fiduciary with respect to an employee benefit plan, its participants or beneficiaries.

(p)    “Subsidiary” shall mean, with respect to any Person, any corporation, limited liability company, partnership, joint venture, trust or other entity of which a majority of the voting power of the voting equity securities or equity interest is owned, directly or indirectly, by that Person.

3.    INDEMNITY IN THIRD-PARTY PROCEEDINGS. To the fullest extent permitted by applicable law, the Company shall indemnify, hold harmless and exonerate Indemnitee in accordance with the provisions of this Section 3 if Indemnitee was, is or is threatened to be made a party to or a participant (as a witness, deponent or otherwise) in any Proceeding, other than a Proceeding by or in the right of the Company to procure a judgment in its favor. Pursuant to this Section 3, Indemnitee shall be indemnified, held harmless and exonerated against all Expenses, judgments, liabilities, fines, penalties and amounts paid in settlement (including all interest, assessments and other charges paid or payable in connection with or in respect of such Expenses, judgments, liabilities, fines, penalties and amounts paid in settlement) actually and reasonably incurred by Indemnitee or on Indemnitee’s behalf in connection with such Proceeding or any claim, issue or matter therein, if Indemnitee acted in good faith and in a manner Indemnitee reasonably believed to be in or not opposed to the best interests of the Company and, in the case of a criminal Proceeding, had no reasonable cause to believe that Indemnitee’s conduct was unlawful.

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4.    INDEMNITY IN PROCEEDINGS BY OR IN THE RIGHT OF THE COMPANY. To the fullest extent permitted by applicable law, the Company shall indemnify, hold harmless and exonerate Indemnitee in accordance with the provisions of this Section 4 if Indemnitee was, is or is threatened to be made a party to or a participant (as a witness, deponent or otherwise) in any Proceeding by or in the right of the Company to procure a judgment in its favor. Pursuant to this Section 4, Indemnitee shall be indemnified, held harmless and exonerated against all Expenses actually and reasonably incurred by Indemnitee or on Indemnitee’s behalf in connection with such Proceeding or any claim, issue or matter therein, if Indemnitee acted in good faith and in a manner Indemnitee reasonably believed to be in or not opposed to the best interests of the Company. No indemnification, hold harmless or exoneration for Expenses shall be made under this Section 4 in respect of any claim, issue or matter as to which Indemnitee shall have been finally adjudged by a court of competent jurisdiction to be liable to the Company, unless and only to the extent that any court in which the Proceeding was brought or the Delaware Court shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, Indemnitee is fairly and reasonably entitled to indemnification, to be held harmless or to exoneration.

5.    INDEMNIFICATION FOR EXPENSES OF A PARTY WHO IS WHOLLY OR PARTLY SUCCESSFUL. Notwithstanding any other provisions of this Agreement except for Section 27, to the extent that Indemnitee was or is a party to (or a participant in) and is successful, on the merits or otherwise, in defending any Proceeding or in defense of any claim, issue or matter therein, in whole or in part, the Company shall, to the fullest extent permitted by applicable law, indemnify, hold harmless and exonerate Indemnitee against all Expenses actually and reasonably incurred by Indemnitee in connection therewith. If Indemnitee is not wholly successful in defense of such Proceeding (or part thereof) but is successful, on the merits or otherwise, in defense of one or more but less than all claims, issues or matters in such Proceeding, the Company shall, to the fullest extent permitted by applicable law, indemnify, hold harmless and exonerate Indemnitee against all Expenses actually and reasonably incurred by Indemnitee or on Indemnitee’s behalf in connection with each such successfully resolved claim, issue or matter. If Indemnitee is not wholly successful in defense of such Proceeding, the Company also shall, to the fullest extent permitted by applicable law, indemnify, hold harmless and exonerate Indemnitee against all Expenses reasonably incurred in connection with a claim, issue or matter related to any claim, issue or matter in defense of which Indemnitee was successful. For purposes of this Section 5 and without limiting the foregoing, the termination of any claim, issue or matter in such a Proceeding by dismissal, with or without prejudice, shall be deemed to be a successful result as to the defense of such claim, issue or matter.

6.    INDEMNIFICATION FOR EXPENSES OF A WITNESS. Notwithstanding any other provision of this Agreement except for Section 27, to the extent that Indemnitee is, by reason of Indemnitee’s Corporate Status, a witness or deponent in any Proceeding to which Indemnitee was not or is not a party or threatened to be made a party, Indemnitee shall, to the fullest extent permitted by applicable law, be indemnified, held harmless and exonerated against all Expenses actually and reasonably incurred by Indemnitee or on Indemnitee’s behalf in connection therewith.

7.    ADDITIONAL INDEMNIFICATION, HOLD HARMLESS AND EXONERATION RIGHTS. Notwithstanding any limitation in Section 3, 4 or 5, except for Section 27, the Company shall, to the fullest extent permitted by applicable law, indemnify, hold harmless and exonerate Indemnitee if Indemnitee is a party to or threatened to be made a party to any

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Proceeding (including a Proceeding by or in the right of the Company to procure a judgment in its favor) against all Expenses and judgments, fines, penalties and amounts paid in settlement (including all interest, assessments and other charges paid or payable in connection with or in respect of such Expenses, judgments, liabilities, fines, penalties and amounts paid in settlement) actually and reasonably incurred by Indemnitee in connection with the Proceeding.

8.    CONTRIBUTION IN THE EVENT OF JOINT LIABILITY.

(a)    To the fullest extent permissible under applicable law, if the indemnification, hold harmless and/or exoneration rights provided for in this Agreement are unavailable to Indemnitee in whole or in part for any reason whatsoever, the Company, in lieu of indemnifying, holding harmless or exonerating Indemnitee, shall pay, in the first instance, the entire amount incurred by Indemnitee, whether for judgments, liabilities, fines, penalties, amounts paid or to be paid in settlement and/or for Expenses, in connection with any Proceeding without requiring Indemnitee to contribute to such payment, and the Company hereby waives and relinquishes any right of contribution it may have at any time against Indemnitee.

(b)    The Company shall not enter into any settlement of any Proceeding in which the Company is jointly liable with Indemnitee (or would be if joined in such Proceeding) unless such settlement provides for a full and final release of all claims asserted against Indemnitee.

(c)    The Company hereby agrees to fully indemnify, hold harmless and exonerate Indemnitee from any claims for contribution which may be brought by officers, directors or employees of the Company other than Indemnitee who may be jointly liable with Indemnitee.

9.    EXCLUSIONS. Notwithstanding any provision in this Agreement except for Section 27, the Company shall not be obligated under this Agreement to make any indemnification, advance expenses, hold harmless or exoneration payment in connection with any claim made against Indemnitee:

(a)    for which payment has actually been received by or on behalf of Indemnitee under any insurance policy, contract, agreement or other indemnity or advancement provision or otherwise, except with respect to any excess beyond the amount actually received under any insurance policy, contract, agreement, other indemnity or advancement provision or otherwise;

(b)    for an accounting of profits made from the purchase and sale (or sale and purchase) by Indemnitee of securities of the Company within the meaning of Section 16(b) of the Exchange Act (or any successor rule) or similar provisions of state statutory law or common law; or

(c)    except as otherwise provided in Sections 14(f) through (g), prior to a Change in Control, in connection with any Proceeding (or any part of any Proceeding) initiated by Indemnitee, including any Proceeding (or any part of any Proceeding) initiated by Indemnitee against the Company or its directors, officers, employees or other

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indemnitees, unless (i) the Board authorized the Proceeding (or any part of any Proceeding) prior to its initiation or (ii) the Company provides the indemnification, advance of expenses, hold harmless or exoneration payment, in its sole discretion, pursuant to the powers vested in the Company under applicable law. Indemnitee shall seek payments or advances from the Company only to the extent that such payments or advances are unavailable from any insurance policy of the Company covering Indemnitee.

10.    ADVANCES OF EXPENSES; DEFENSE OF CLAIM.

(a)    Notwithstanding any provision of this Agreement to the contrary except for Section 27, and to the fullest extent not prohibited by applicable law, the Company shall pay the Expenses incurred by Indemnitee (or reasonably expected by Indemnitee to be incurred by Indemnitee within three (3) months) in connection with any Proceeding within ten (10) days after the receipt by the Company of a statement or statements requesting such advances from time to time, prior to the final disposition of any Proceeding. Advances shall, to the fullest extent permitted by law, be unsecured and interest free and shall be made without regard to Indemnitee’s ability to repay the Expenses and without regard to Indemnitee’s ultimate entitlement to be indemnified, held harmless or exonerated under the other provisions of this Agreement. Advances shall include any and all reasonable Expenses incurred pursuing a Proceeding to enforce this right of advancement, including Expenses incurred preparing and forwarding statements to the Company to support the advances claimed. Indemnitee shall qualify for advances upon the execution and delivery of this Agreement, which shall constitute Indemnitee’s undertaking, but only to the extent such an undertaking is required by applicable law, to repay the advanced amounts to the extent that it is ultimately determined that Indemnitee is not entitled to be indemnified, held harmless or exonerated by the Company under the provisions of this Agreement, the Charter, the Bylaws of the Company, applicable law or otherwise. This Section 10(a) shall not apply to any claim made by Indemnitee for which an indemnification, advance of expenses, hold harmless or exoneration payment is excluded pursuant to Section 9.

(b)    The Company shall be entitled to participate in the Proceeding at its own expense.

(c)    The Company shall not settle any action, claim or Proceeding (in whole or in part) which would impose any Expense, judgment, liability, fine, penalty or limitation on Indemnitee without Indemnitee’s prior written consent.

11.    PROCEDURE FOR NOTIFICATION AND APPLICATION FOR INDEMNIFICATION.

(a)    Indemnitee agrees to promptly notify the Company in writing upon being served with any summons, citation, subpoena, complaint, indictment, information or other document relating to any Proceeding, claim, issue or matter therein which may be subject to indemnification, hold harmless or exoneration rights or advancement of Expenses covered hereunder. The failure of Indemnitee to so notify the Company shall not relieve the Company of any obligation which it may have to Indemnitee under this Agreement, or otherwise.

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(b)    Indemnitee may deliver to the Company written application(s) to indemnify, hold harmless or exonerate Indemnitee in accordance with this Agreement. Such application(s) may be delivered from time to time and at such time(s) as Indemnitee deems appropriate in Indemnitee’s sole discretion. Following such a written application for indemnification by Indemnitee, Indemnitee’s entitlement to indemnification shall be determined according to Section 12(a).

12.    PROCEDURE UPON APPLICATION FOR INDEMNIFICATION.

(a)    A determination, if required by applicable law, with respect to Indemnitee’s entitlement to indemnification shall be made in the specific case by one of the following methods: (i) if no Change of Control has occurred (x) by a majority vote of the Disinterested Directors, even if less than a quorum of the Board, (y) by a committee of Disinterested Directors, even if less than a quorum of the Board, or (z) if there are no Disinterested Directors, or if such Disinterested Directors so direct, by Independent Counsel in a written opinion to the Board, a copy of which shall be delivered to Indemnitee; or (ii) if a Change in Control has occurred, by Independent Counsel in a written opinion to the Board, a copy of which shall be delivered to Indemnitee. The Company shall promptly advise Indemnitee in writing with respect to any determination that Indemnitee is or is not entitled to indemnification, including a description of any reason or basis for which indemnification has been denied. If it is so determined that Indemnitee is entitled to indemnification, payment to Indemnitee shall be made within ten (10) days after such determination. Indemnitee shall reasonably cooperate with the Person making such determination with respect to Indemnitee’s entitlement to indemnification, including providing to such Person upon reasonable advance request any documentation or information which is not privileged or otherwise protected from disclosure and which is reasonably available to Indemnitee and reasonably necessary to such determination. Any costs or Expenses (including reasonable attorneys’ fees and disbursements) incurred by Indemnitee in so cooperating with the Person making such determination shall be borne by the Company (irrespective of the determination as to Indemnitee’s entitlement to indemnification) and the Company hereby agrees to indemnify and to hold Indemnitee harmless therefrom.

(b)    In the event the determination of entitlement to indemnification is to be made by Independent Counsel pursuant to Section 12(a), the Independent Counsel shall be selected as provided in this Section 12(b). The Independent Counsel shall be selected by Indemnitee (unless Indemnitee shall request that such selection be made by the Board), and Indemnitee shall give written notice to the Company advising it of the identity of the Independent Counsel so selected and certifying that the Independent Counsel so selected meets the requirements of “Independent Counsel” as defined in Section 2. If the Independent Counsel is selected by the Board, the Company shall give written notice to Indemnitee advising Indemnitee of the identity of the Independent Counsel so selected and certifying that the Independent Counsel so selected meets the requirements of “Independent Counsel” as defined in Section 2. In either event, Indemnitee or the Company, as the case may be, may, within ten (10) days after such written notice of selection shall have been received, deliver to the Company or to Indemnitee, as the case may be, a written objection to such selection; provided, however, that such objection may

9

be asserted only on the ground that the Independent Counsel so selected does not meet the requirements of “Independent Counsel” as defined in Section 2, and the objection shall set forth with particularity the factual basis of such assertion. Absent a proper and timely objection, the person so selected shall act as Independent Counsel. If such written objection is so made and substantiated, the Independent Counsel so selected may not serve as Independent Counsel unless and until such objection is withdrawn or a court of competent jurisdiction has determined that such objection is without merit. If, within twenty (20) days after submission by Indemnitee of a written request for indemnification pursuant to Section 11(b), no Independent Counsel shall have been selected and not objected to, either the Company or Indemnitee may petition the Delaware Court for resolution of any objection which shall have been made by the Company or Indemnitee to the other’s selection of Independent Counsel and/or for the appointment as Independent Counsel of a person selected by the Delaware Court, and the Person with respect to whom all objections are so resolved or the Person so appointed shall act as Independent Counsel under Section 12(a). Upon the due commencement of any judicial proceeding or arbitration pursuant to Section 14(a), Independent Counsel shall be discharged and relieved of any further responsibility in such capacity (subject to the applicable standards of professional conduct then prevailing).

(c)    The Company agrees to pay the reasonable fees and expenses of Independent Counsel and to fully indemnify and hold harmless such Independent Counsel against any and all Expenses, claims, liabilities and damages arising out of or relating to this Agreement or its engagement pursuant hereto.

13.    PRESUMPTIONS AND EFFECT OF CERTAIN PROCEEDINGS.

(a)    In making a determination with respect to entitlement to indemnification hereunder, the Person making such determination shall presume that Indemnitee is entitled to indemnification under this Agreement if Indemnitee has submitted a request for indemnification in accordance with Section 11(b), and the Company shall have the burden of proof to overcome that presumption in connection with the making by any person, persons or entity of any determination contrary to that presumption. Neither the failure of the Company (including by the Disinterested Directors or Independent Counsel) to have made a determination prior to the commencement of any action pursuant to this Agreement that indemnification is proper in the circumstances because Indemnitee has met the applicable standard of conduct, nor an actual determination by the Company (including by the Disinterested Directors or Independent Counsel) that Indemnitee has not met such applicable standard of conduct, shall be a defense to the action or create a presumption that Indemnitee has not met the applicable standard of conduct.

(b)    If the Person empowered or selected under Section 12 to determine whether Indemnitee is entitled to indemnification shall not have made a determination within thirty (30) days after receipt by the Company of the request therefor, the requisite determination of entitlement to indemnification shall, to the fullest extent permitted by law, be deemed to have been made and Indemnitee shall be entitled to such indemnification, absent (i) a misstatement by Indemnitee of a material fact, or an omission of a material fact necessary to make Indemnitee’s statement not materially misleading, in connection with the request

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for indemnification, or (ii) a final judicial determination that any or all such indemnification is expressly prohibited under applicable law; provided, however, that such thirty (30)-day period may be extended for a reasonable time, not to exceed an additional fifteen (15) days, if the Person making the determination with respect to entitlement to indemnification in good faith requires such additional time for the obtaining or evaluating of documentation and/or information relating thereto.

(c)    The termination of any Proceeding or of any claim, issue or matter therein, by judgment, order, settlement or conviction, or upon a plea of nolo contendere or its equivalent, shall not (except as otherwise expressly provided in this Agreement) of itself adversely affect the right of Indemnitee to indemnification or create a presumption that Indemnitee did not act in good faith and in a manner which Indemnitee reasonably believed to be in or not opposed to the best interests of the Company or, with respect to any criminal Proceeding, that Indemnitee had reasonable cause to believe that Indemnitee’s conduct was unlawful.

(d)    For purposes of any determination of good faith, Indemnitee shall be deemed to have acted in good faith if Indemnitee’s action is based on the records or books of account of the Enterprise, including financial statements, or on information supplied to Indemnitee by the directors, manager or officers of the Enterprise in the course of their duties, or on the advice of legal counsel for the Enterprise, the board of directors or managers of the Enterprise, any committee of the board of directors or managers of the Enterprise or any director, trustee, general partner, manager or managing member, or on information or records given or reports made to the Enterprise, the board of directors or managers of the Enterprise, any committee of the board of directors or managers of the Enterprise or any director, trustee, general partner, manager or managing member, by an independent certified public accountant or by an appraiser or other expert selected by the Enterprise, the board of directors or managers of the Enterprise, any committee of the board of directors or managers of the Enterprise or any director, trustee, general partner, manager or managing member. The provisions of this Section 13(d) shall not be deemed to be exclusive or to limit in any way the other circumstances in which Indemnitee may be deemed or found to have met the applicable standard of conduct set forth in this Agreement.

(e)    The knowledge and/or actions, or failure to act, of any other director, officer, trustee, partner, manager, managing member, fiduciary, agent or employee of the Enterprise shall not be imputed to Indemnitee for purposes of determining the right to indemnification under this Agreement.

14.    REMEDIES OF INDEMNITEE.

(a)    In the event that (i) a determination is made pursuant to Section 12 that Indemnitee is not entitled to indemnification under this Agreement, (ii) advancement of Expenses, to the fullest extent permitted by applicable law, is not timely made pursuant to Section 10, (iii) no determination of entitlement to indemnification shall have been made pursuant to Section 12(a) within thirty (30) days after receipt by the Company of the request for indemnification, (iv) payment of indemnification is not made pursuant to Sections 5, 6, 7 or the last sentence of Section 12(a) within ten (10) days after receipt by the Company of

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a written request therefor, (v) a contribution payment is not made in a timely manner pursuant to Section 8, (vi) payment of indemnification pursuant to Section 3 or 4 is not made within ten (10) days after a determination has been made that Indemnitee is entitled to indemnification, or (vii) payment to Indemnitee pursuant to any hold harmless or exoneration rights under this Agreement or otherwise is not made in accordance with this Agreement, Indemnitee shall be entitled to an adjudication by the Delaware Court to such indemnification, hold harmless, exoneration, contribution or advancement rights. Alternatively, Indemnitee, at Indemnitee’s option, may seek an award in arbitration to be conducted by a single arbitrator pursuant to the Commercial Arbitration Rules of the American Arbitration Association. Except as set forth herein, the provisions of Delaware law (without regard to its conflict of laws rules) shall apply to any such arbitration. The Company shall not oppose Indemnitee’s right to seek any such adjudication or award in arbitration. Such adjudication or arbitration proceeding is referred to herein as “Enforcement Proceeding.”

(b)    In the event that a determination shall have been made pursuant to Section 12(a) that Indemnitee is not entitled to indemnification, any Enforcement Proceeding shall be conducted in all respects as a de novo trial or arbitration on the merits and Indemnitee shall not be prejudiced by reason of that adverse determination.

(c)    In any Enforcement Proceeding, Indemnitee shall be presumed to be entitled to be indemnified, held harmless, exonerated and to receive advancement of Expenses under this Agreement and the Company shall have the burden of proving Indemnitee is not entitled to be indemnified, held harmless, exonerated and to receive advancement of Expenses, as the case may be, and the Company may not refer to or introduce into evidence any determination pursuant to Section 12(a) adverse to Indemnitee for any purpose. If Indemnitee commences an Enforcement Proceeding, Indemnitee shall not be required to reimburse the Company for any advances pursuant to Section 10 until a final determination is made with respect to Indemnitee’s entitlement to indemnification (as to which all rights of appeal have been exhausted or lapsed).

(d)    If a determination shall have been made pursuant to Section 12(a) that Indemnitee is entitled to indemnification, the Company shall be bound by such determination in Enforcement Proceeding, absent (i) a misstatement by Indemnitee of a material fact, or an omission of a material fact necessary to make Indemnitee’s statement not materially misleading, in connection with the request for indemnification, or (ii) a prohibition of such indemnification under applicable law.

(e)    The Company shall be precluded from asserting in Enforcement Proceeding that the procedures and presumptions of this Agreement are not valid, binding and enforceable and shall stipulate in any such court or before any such arbitrator that the Company is bound by all the provisions of this Agreement.

(f)    The Company shall indemnify and hold harmless Indemnitee to the fullest extent permitted by law against all Expenses (assuming for purposes of this sentence that all references to a Proceeding in the definition of Expenses were references to an Enforcement Proceeding) and, if requested by Indemnitee, shall (within ten (10) days after

12

the Company’s receipt of such written request) pay to Indemnitee, to the fullest extent permitted by applicable law, such Expenses which are incurred by Indemnitee in connection with any Enforcement Proceeding brought by Indemnitee (i) to enforce Indemnitee’s rights under, or to recover damages for breach of, this Agreement or any other indemnification, hold harmless, exoneration, advancement or contribution agreement or provision of the Charter, or the Bylaws now or hereafter in effect or (ii) for recovery or advances under any insurance policy maintained by any Person for the benefit of Indemnitee, regardless of the outcome and whether Indemnitee ultimately is determined to be entitled to such indemnification, hold harmless or exoneration right, advancement, contribution or insurance recovery, as the case may be (unless such Enforcement Proceeding was not brought by Indemnitee in good faith).

(g)    Interest shall be paid by the Company to Indemnitee at a rate to be agreed between the Company and Indemnitee for amounts which the Company indemnifies, holds harmless, exonerates or advances, or is obliged to indemnify, hold harmless or exonerate or advance for the period commencing with the date on which Indemnitee requests indemnification, to be held harmless, exonerated, contribution, reimbursement or advancement of any Expenses and ending with the date on which such payment is made to Indemnitee by the Company.

15.    SECURITY. Notwithstanding anything herein to the contrary except for Section 27, to the extent requested by Indemnitee and approved by the Board, the Company may at any time and from time to time provide security to Indemnitee for the Company’s obligations hereunder through an irrevocable bank line of credit, funded trust or other collateral. Any such security, once provided to Indemnitee, may not be revoked or released without the prior written consent of Indemnitee.

16.    NON-EXCLUSIVITY; SURVIVAL OF RIGHTS; INSURANCE; SUBROGATION.

(a)    The rights of Indemnitee as provided by this Agreement shall not be deemed exclusive of any other rights to which Indemnitee may at any time be entitled under applicable law, the Charter, the Bylaws, any agreement, a vote of stockholders, a resolution of directors or otherwise. No amendment, alteration or repeal of this Agreement or of any provision hereof shall limit or restrict any right of Indemnitee under this Agreement in respect of any Proceeding (regardless of when such Proceeding is first threatened, commenced or completed) or claim, issue or matter therein arising out of, or related to, any action taken or omitted by such Indemnitee in Indemnitee’s Corporate Status prior to such amendment, alteration or repeal, except as may otherwise be expressly set forth in such amendment, alteration or repeal and mutually agreed by Indemnitee and the Company. To the extent that a change in applicable law, whether by statute or judicial decision, permits greater indemnification, hold harmless or exoneration rights or advancement of Expenses than would be afforded currently under the Charter, the Bylaws or this Agreement, it is the intent of the parties hereto that Indemnitee shall enjoy by this Agreement the greater benefits so afforded by such change. No right or remedy herein conferred is intended to be exclusive of any other right or remedy, and every other right and remedy shall be cumulative and in addition to every other right and remedy given hereunder or now or

13

hereafter existing at law or in equity or otherwise. The assertion or employment of any right or remedy hereunder or otherwise shall not prevent the concurrent assertion or employment of any other right or remedy.

(b)    The Delaware General Corporation Law (the “DGCL”), the Charter and the Bylaws permit the Company to purchase and maintain insurance or furnish similar protection or make other arrangements, including, but not limited to, providing a trust fund, letter of credit or surety bond (“Indemnification Arrangements”) on behalf of Indemnitee against any liability asserted against Indemnitee or incurred by or on behalf of Indemnitee or in such capacity as a director, officer, employee or agent of the Company, or arising out of Indemnitee’s status as such, whether or not the Company would have the power to indemnify Indemnitee against such liability under the provisions of this Agreement or under the DGCL, as it may then be in effect. The purchase, establishment and maintenance of any such Indemnification Arrangement shall not in any way limit or affect the rights and obligations of the Company or Indemnitee under this Agreement except as expressly provided herein, and the execution and delivery of this Agreement by the Company and Indemnitee shall not in any way limit or affect the rights and obligations of the Company or the other party or parties thereto under any such Indemnification Arrangement.

(c)    To the extent that any member of the Company Group maintains an insurance policy or policies providing liability insurance for directors, officers, trustees, partners, managers, managing members, fiduciaries, employees or agents of the Company Group or of any other Enterprise which such person serves at the request of the Company, Indemnitee shall be covered by such policy or policies in accordance with its or their terms to the maximum extent of the coverage available for any such director, officer, trustee, partner, manager, managing member, fiduciary, employee or agent under such policy or policies. If, at the time the Company receives notice from any source of a Proceeding as to which Indemnitee is a party or a participant (as a witness, deponent or otherwise), the Company has director and officer liability insurance in effect, the Company shall give prompt notice of such Proceeding to the insurers in accordance with the procedures set forth in the respective policies. The Company shall thereafter take or cause to be taken all necessary or desirable action to cause such insurers to pay, on behalf of Indemnitee, all amounts payable as a result of such Proceeding in accordance with the terms of such policies.

(d)    In the event of any payment under this Agreement, the Company, to the fullest extent permitted by law, shall be subrogated to the extent of such payment to all of the rights of recovery of Indemnitee, who shall execute all papers required and take all action necessary to secure such rights, including execution of such documents as are necessary to enable the Company to bring suit to enforce such rights.

(e)    The Company’s obligation to indemnify, hold harmless, exonerate or advance Expenses hereunder to Indemnitee who is or was serving at the request of the Company as a director, officer, trustee, partner, manager, managing member, fiduciary, employee or agent of any other Enterprise shall be reduced by any amount Indemnitee has actually received as indemnification, hold harmless or exoneration payments or advancement of expenses from such Enterprise. Notwithstanding any other provision of

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this Agreement to the contrary except for Section 27, (i) Indemnitee shall have no obligation to reduce, offset, allocate, pursue or apportion any indemnification, hold harmless, exoneration, advancement, contribution or insurance coverage among multiple parties possessing such duties to Indemnitee prior to the Company’s satisfaction and performance of all its obligations under this Agreement, and (ii) the Company shall perform fully its obligations under this Agreement without regard to whether Indemnitee holds, may pursue or has pursued any indemnification, advancement, hold harmless, exoneration, contribution or insurance coverage rights against any person or entity other than the Company.

(f)    To the extent Indemnitee has rights to indemnification, advancement of expenses and/or insurance provided by the Sponsor or its affiliates as applicable, (i) the Company shall be the indemnitor of first resort (i.e., that its obligations to Indemnitee are primary and any obligation of the Sponsor or its affiliates, as applicable, to advance expenses or to provide indemnification for the same expenses or liabilities incurred by Indemnitee are secondary), (ii) the Company shall be required to advance the full amount of expenses incurred by Indemnitee and shall be liable for the full amount of all claims, liabilities, damages, losses, costs and expenses (including amounts paid in satisfaction of judgments, in compromises and settlements, as fines and penalties and legal or other costs and reasonable expenses of investigating or defending against any claim or alleged claim) to the extent legally permitted and as required by the terms of this Agreement, the Charter, the Bylaws or another agreement of the Company, without regard to any rights Indemnitee may have against the Sponsor or its affiliates, as applicable, and (iii) the Company irrevocably waives, relinquishes and releases the Sponsor and its affiliates, as applicable, from any and all claims against them for contribution, subrogation or any other recovery of any kind in respect thereof. No advancement or payment by the Sponsor or its affiliates, as applicable, on behalf of Indemnitee with respect to any claim for which Indemnitee has sought indemnification from the Company shall affect the foregoing, and the Sponsor and its affiliates, as applicable, shall have a right of contribution and be subrogated to the extent of such advancement or payment to all of the rights of recovery of Indemnitee against the Company.

17.    DURATION OF AGREEMENT. All agreements and obligations of the Company contained herein shall continue during the period Indemnitee serves as a director or officer of the Company or as a director, officer, trustee, partner, manager, managing member, fiduciary, employee or agent of any other corporation, partnership, joint venture, trust, employee benefit plan or other Enterprise which Indemnitee serves at the request of the Company and shall continue thereafter so long as Indemnitee shall be subject to any possible Proceeding or Enforcement Proceeding (including any rights of appeal thereto) by reason of Indemnitee’s Corporate Status, whether or not Indemnitee is acting in any such capacity at the time any liability or expense is incurred for which indemnification or advancement can be provided under this Agreement.

18.    SEVERABILITY. If any provision or provisions of this Agreement shall be held to be invalid, illegal or unenforceable for any reason whatsoever, (a) the validity, legality and enforceability of the remaining provisions of this Agreement (including each portion of any section, paragraph or sentence of this Agreement containing any such provision held to be invalid, illegal or unenforceable, that is not itself invalid, illegal or unenforceable) shall not in any way be

15

affected or impaired thereby and shall remain enforceable to the fullest extent permitted by law, (b) such provision or provisions shall be deemed reformed to the extent necessary to conform to applicable law and to give the maximum effect to the intent of the parties hereto and (c) to the fullest extent possible, the provisions of this Agreement (including each portion of any section, paragraph or sentence of this Agreement containing any such provision held to be invalid, illegal or unenforceable, that is not itself invalid, illegal or unenforceable) shall be construed so as to give effect to the intent manifested thereby.

19.    ENFORCEMENT AND BINDING EFFECT.

(a)    The Company expressly confirms and agrees that it has entered into this Agreement and assumed the obligations imposed on it hereby in order to induce Indemnitee to serve as a director, officer or key employee of the Company Group, and the Company acknowledges that Indemnitee is relying upon this Agreement in serving as a director, officer or key employee of the Company Group.

(b)    Without limiting any of the rights of Indemnitee under the Charter or the Bylaws, this Agreement constitutes the entire agreement between the parties hereto with respect to the subject matter hereof and supersedes all prior agreements and understandings, oral, written and implied, between the parties hereto with respect to the subject matter hereof.

(c)    The indemnification, hold harmless, exoneration and advancement of expenses rights provided by or granted pursuant to this Agreement shall be binding upon and be enforceable by the parties hereto and their respective successors and permitted assigns (including any direct or indirect successor by purchase, merger, consolidation or otherwise to all or substantially all of the business and/or assets of the Company, but subject to such successor’s compliance with Section 19(d)), shall continue as to Indemnitee who has ceased to be a director, officer, employee or agent of the Company or a director, officer, trustee, general partner, manager, managing member, fiduciary, employee or agent of any other Enterprise at the Company’s request, and shall inure to the benefit of Indemnitee and Indemnitee’s spouse, permitted assigns, heirs, devisees, executors and administrators and other legal representatives.

(d)    The Company shall require and cause any successor (whether direct or indirect by purchase, merger, consolidation or otherwise) to all, substantially all or a substantial part, of the business and/or assets of the Company, by written agreement in form and substance satisfactory to Indemnitee, expressly to assume and agree to perform this Agreement in the same manner and to the same extent that the Company would be required to perform if no such succession had taken place.

(e)    The Company and Indemnitee agree herein that a monetary remedy for breach of this Agreement, at some later date, may be inadequate, impracticable and difficult of proof and further agree that such breach may cause Indemnitee irreparable harm. Accordingly, the parties hereto agree that Indemnitee may, to the fullest extent permitted by law, enforce this Agreement by seeking, among other things, injunctive relief and/or specific performance hereof, without any necessity of showing actual damage or

16

irreparable harm and that by seeking injunctive relief and/or specific performance, Indemnitee shall not be precluded from seeking or obtaining any other relief to which Indemnitee may be entitled. The Company and Indemnitee further agree that Indemnitee shall, to the fullest extent permitted by law, be entitled to such specific performance and injunctive relief, including temporary restraining orders, preliminary injunctions and permanent injunctions, without the necessity of posting bonds or other security in connection therewith. The Company acknowledges that, in the absence of a waiver, a bond or other security may be required of Indemnitee by a court of competent jurisdiction. The Company hereby waives any such requirement of such a bond or other security to the fullest extent permitted by law.

20.    MODIFICATION AND WAIVER. No supplement, modification or amendment of this Agreement shall be binding unless executed in writing by the Company and Indemnitee. No waiver of any provision of this Agreement shall be enforceable unless in writing and signed by the party against whom it is to be enforced. No waiver of any of the provisions of this Agreement shall be deemed or shall constitute a waiver of any other provisions of this Agreement nor shall any waiver constitute a continuing waiver.

21.    NOTICES. All notices, requests, demands and other communications under this Agreement shall be in writing and shall be deemed to have been duly given (i) if delivered by hand and receipted for by the party to whom said notice or other communication shall have been directed, or (ii) mailed by certified or registered mail with postage prepaid, on the third (3rd) business day after the date on which it is so mailed:

(a)    If to Indemnitee, to:

c/o C5 Acquisition Corporation

1701 Pennsylvania Ave NW

Ste #460

Washington, D.C. 20006

Attention: Steven J. Demetriou

or such other address as Indemnitee shall provide in writing to the Company.

(b)    If to the Company, to:

C5 Acquisition Corporation

1701 Pennsylvania Ave NW

Ste #460

Washington, D.C. 20006

Attention: Robert Meyerson

With a copy, which shall not constitute notice, to

Paul, Weiss, Rifkind, Wharton & Garrison LLP

1285 Avenue of the Americas

New York, New York 10019

Attention: Raphael M. Russo

or to any other address as may have been furnished to Indemnitee in writing by the Company.

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22.    APPLICABLE LAW AND CONSENT TO JURISDICTION. This Agreement and the legal relations among the parties shall be governed by, and construed and enforced in accordance with, the laws of the State of Delaware, without regard to its conflict of laws rules. Except with respect to any arbitration commenced by Indemnitee pursuant to Section 14(a), to the fullest extent permitted by law, the Company and Indemnitee hereby irrevocably and unconditionally (a) agree that any action or proceeding arising out of or in connection with this Agreement shall be brought only in the Delaware Court and not in any other state or federal court in the United States of America or any court in any other country, (b) consent to submit to the exclusive jurisdiction of the Delaware Court for purposes of any action or proceeding arising out of or in connection with this Agreement, (c) waive any objection to the laying of venue of any such action or proceeding in the Delaware Court and (d) waive, and agree not to plead or to make, any claim that any such action or proceeding brought in the Delaware Court has been brought in an improper or inconvenient forum, or is subject (in whole or in part) to a jury trial. To the fullest extent permitted by law, the parties hereby agree that the mailing of process and other papers in connection with any such action or proceeding in the manner provided by Section 21 or in such other manner as may be permitted by law, shall be valid and sufficient service thereof.

23.    IDENTICAL COUNTERPARTS. This Agreement may be executed in one or more counterparts, each of which shall for all purposes be deemed to be an original but all of which together shall constitute one and the same Agreement. Only one such counterpart signed by the party against whom enforceability is sought needs to be produced to evidence the existence of this Agreement.

24.    MISCELLANEOUS. Use of the masculine pronoun shall be deemed to include usage of the feminine pronoun where appropriate. The headings of the paragraphs of this Agreement are inserted for convenience only and shall not be deemed to constitute part of this Agreement or to affect the construction thereof. The term “including” (whether or not that term is followed by the phrase “but not limited to” or “without limitation” or words of similar effect) is used in this Agreement in connection with a listing of items within a particular classification, that listing shall be interpreted to be illustrative only and shall not be interpreted as a limitation on, or exclusive listing of, the items within that classification.

25.    ADDITIONAL ACTS. If for the validation of any of the provisions in this Agreement any act, resolution, approval or other procedure is required to the fullest extent permitted by law, the Company undertakes to cause such act, resolution, approval or other procedure to be affected or adopted in a manner that will enable the Company to fulfill its obligations under this Agreement.

26.    WAIVER OF CLAIMS TO TRUST ACCOUNT. Indemnitee hereby agrees that it does not have any right, title, interest or claim of any kind (each, a “Claim”) in or to any monies in the trust account established in connection with the Company’s initial public offering for the benefit of the Company and holders of shares issued in such initial public offering and hereby waives any Claim it may have in the future as a result of, or arising out of, any services provided

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to the Company and will not seek recourse against such trust account for any reason whatsoever. Accordingly, Indemnitee acknowledges and agrees that any indemnification provided hereto will only be able to be satisfied by the Company if (i) the Company has sufficient funds outside of the trust account to satisfy its obligations hereunder or (ii) the Company consummates a Business Combination.

27.    MAINTENANCE OF INSURANCE. The Company shall use commercially reasonable efforts to obtain and maintain in effect during the entire period for which the Company is obligated to indemnify Indemnitee under this Agreement, one or more policies of insurance with reputable insurance companies to provide the directors and/or officers of the Company with coverage for losses from wrongful acts and omissions and to ensure the Company’s performance of its indemnification obligations under this Agreement. Indemnitee shall be covered by such policy or policies in accordance with its or their terms to the maximum extent of the coverage available for any such director or officer under such policy or policies. In all such insurance policies, Indemnitee shall be named as an insured in such a manner as to provide Indemnitee with the same rights and benefits as are accorded to the most favorably insured of the Company’s directors and officers.

[Signature Pages Follow]

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IN WITNESS WHEREOF, the parties hereto have caused this Indemnity Agreement to be signed as of the date first above written.

[Signature Page to Indemnity Agreement—C5 Acquisition Corporation]

Exhibit 10.6

EXECUTION VERSION

INDEMNITY AGREEMENT

THIS INDEMNITY AGREEMENT is made as of January 6, 2022 (as amended, supplemented or otherwise modified from time to time, this “Agreement”), by and between C5 Acquisition Corporation, a Delaware corporation (the “Company”), and David Glickman (“Indemnitee”).

RECITALS

WHEREAS, the board of directors of the Company (the “Board”) has determined that it is reasonable, prudent and necessary for the Company to obligate itself contractually to indemnify, hold harmless, exonerate and to advance expenses on behalf of persons who serve the Company to the fullest extent permitted by applicable law;

WHEREAS, this Agreement is a supplement to, and in furtherance of, the amended and restated certificate of incorporation of the Company (as further amended, supplemented or otherwise modified from time to time, the “Charter”) and the bylaws of the Company (as amended, supplemented or otherwise modified from time to time, the “Bylaws”) and any resolutions adopted pursuant thereto and shall not be deemed a substitute therefor, nor to diminish or abrogate any rights of Indemnitee thereunder; and

WHEREAS, Indemnitee may not be willing to serve as an officer or director or in another capacity without adequate protection, and the Company desires Indemnitee to serve in such capacity. Indemnitee is willing to serve, continue to serve and to take on additional service for or on behalf of the Company on the condition that Indemnitee be so indemnified.

NOW, THEREFORE, IN CONSIDERATION OF the premises and the covenants contained herein and subject to the provisions of that certain letter agreement, dated as of January 6, 2022, as amended, supplemented or otherwise modified from time to time, the Company and Indemnitee do hereby covenant and agree as follows:

TERMS AND CONDITIONS

1.    SERVICES TO THE COMPANY. In consideration of the Company’s covenants and obligations hereunder, Indemnitee will serve or continue to serve as an officer, director, key employee or in any other capacity of the Company, as applicable, for so long as Indemnitee is duly elected or appointed or until Indemnitee tenders Indemnitee’s resignation or until Indemnitee is removed. Notwithstanding the foregoing, this Agreement shall continue in full force and effect after Indemnitee has ceased to serve as a director, officer, key employee or in any other capacity of the Company as provided in Section 17. This Agreement shall not impose any obligation on Indemnitee or the Company to continue Indemnitee’s service to the Company beyond any period otherwise required by law or by other agreements or commitments of the parties, if any.

2.    DEFINITIONS. As used in this Agreement:

(a)    “Agent” shall mean any person who is or was a director, officer or employee of the Company or a subsidiary of the Company or other person authorized by the Company to act for the Company, to include such person serving in such capacity as a director, officer, employee, fiduciary or other official of another corporation, partnership, limited liability company, joint venture, trust or other enterprise at the request of, for the convenience of, or to represent the interests of the Company or a subsidiary of the Company.

(b)    “Beneficial Owner” and “Beneficial Ownership” shall have the meanings set forth in Rule 13d-3 promulgated under the Exchange Act (as defined below) as in effect on the date hereof.

(c)    “Change in Control” shall be deemed to occur upon the earliest to occur after the date of this Agreement of any of the following events:

(i)    Acquisition of Stock by Third Party. Other than an affiliate of C5 Sponsor LLC (the “Sponsor”), any Person (as defined below) is or becomes the Beneficial Owner, directly or indirectly, of securities of the Company representing fifteen percent (15%) or more of the combined voting power of the Company’s then outstanding securities entitled to vote generally in the election of directors, unless (1) the change in the relative Beneficial Ownership of the Company’s securities by any Person results solely from a reduction in the aggregate number of outstanding shares of securities entitled to vote generally in the election of directors, or (2) such acquisition was approved in advance by the Continuing Directors (as defined below) and such acquisition would not constitute a Change in Control under clause (iii) of this definition;

(ii)    Change in Board of Directors. Individuals who, as of the date of this Agreement, constitute the Board, and any new director whose appointment by the Board or nomination for election by the Company’s stockholders was approved by a vote of at least two-thirds of the directors then still in office who were directors on the date of this Agreement or whose appointment or nomination for election was previously so approved (collectively, the “Continuing Directors”), cease for any reason to constitute a majority of the members of the Board;

(iii)    Corporate Transactions. The effective date of a merger, consolidation, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination, involving the Company and one or more businesses or entities (a “Business Combination”), in each case, unless, following such Business Combination (1) all or substantially all of the individuals and entities who were the Beneficial Owners of securities of the Company entitled to vote generally in the election of directors immediately prior to such Business Combination beneficially own, directly or indirectly, more than fifty-one percent (51%) of the combined voting power of the then outstanding securities of the Company or the surviving or resulting entity or the ultimate parent entity that controls such surviving or resulting entity (the “Successor”) entitled to vote generally in the election of directors of the Successor (including a corporation

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which as a result of such transaction owns the Company or all or substantially all of the Company’s assets either directly or through one or more Subsidiaries (as defined below)) in substantially the same proportions as their ownership immediately prior to such Business Combination, of the securities entitled to vote generally in the election of directors, (2) other than an affiliate of the Sponsor, no Person (excluding any corporation resulting from such Business Combination) is the Beneficial Owner, directly or indirectly, of fifteen percent (15%) or more of the combined voting power of the then outstanding securities entitled to vote generally in the election of directors of the Successor except to the extent that such Person was the Beneficial Owner, directly or indirectly, of fifteen percent (15%) or more of the combined voting power of the Company prior to such Business Combination and (3) a majority of the board of directors (or comparable governing body) of the Successor were Continuing Directors at the time of the execution of the initial agreement, or of the action of the Board of Directors, providing for such Business Combination;

(iv)    Liquidation. The approval by the stockholders of the Company of a complete liquidation of the Company or an agreement or series of agreements for the sale or disposition by the Company of all or substantially all of the Company’s assets, other than factoring the Company’s current receivables or escrows due (or, if such stockholder approval is not required, the decision by the Board to proceed with such a liquidation, sale or disposition in one transaction or a series of related transactions); or

(v)    Other Events. There occurs any other event of a nature that would be required to be reported in response to Item 6(e) of Schedule 14A of Regulation 14A (or any successor rule) (or a response to any similar item on any similar schedule or form) promulgated under the Exchange Act (as defined below), whether or not the Company is then subject to such reporting requirement.

(d)    “Corporate Status” shall mean the status of a Person who is or was a director, officer, trustee, general partner, manager, managing member, fiduciary, employee or agent of the Company or of any other Enterprise (as defined below) which such person is or was serving at the request of the Company.

(e)    “Delaware Court” shall mean the Court of Chancery of the State of Delaware.

(f)    “Disinterested Director” shall mean a director of the Company who is not and was not a party to the Proceeding (as defined below) in respect of which indemnification is sought by Indemnitee.

(g)    “Enterprise” shall mean the Company and any other corporation, constituent corporation (including any constituent of a constituent) absorbed in a consolidation or merger to which the Company (or any of its wholly owned subsidiaries) is a party, limited liability company, partnership, joint venture, trust, employee benefit plan or other enterprise of which Indemnitee is or was serving at the request of the Company as a director, officer, trustee, general partner, managing member, fiduciary, employee or agent.

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(h)    “Exchange Act” shall mean the Securities Exchange Act of 1934, as amended.

(i)    “Expenses” shall include all direct and indirect costs, fees and expenses of any type or nature whatsoever, including all reasonable attorneys’ fees and costs, retainers, court costs, transcript costs, fees of experts, witness fees, travel expenses, fees of private investigators and professional advisors, duplicating costs, printing and binding costs, telephone charges, postage, delivery service fees, fax transmission charges, secretarial services and all other disbursements, obligations or expenses in connection with prosecuting, defending, preparing to prosecute or defend, investigating, being or preparing to be a witness in, settlement or appeal of, or otherwise participating in, a Proceeding (as defined below), including reasonable compensation for time spent by Indemnitee for which he or she is not otherwise compensated by the Company or any third party. Expenses also shall include Expenses incurred in connection with any appeal resulting from any Proceeding (as defined below), including the principal, premium, security for and other costs relating to any cost bond, supersedeas bond or other appeal bond or its equivalent. Notwithstanding the foregoing, “Expenses” shall not include amounts paid in settlement by Indemnitee or the amount of judgments or fines against Indemnitee.

(j)    “Fines” shall include any excise tax assessed on Indemnitee with respect to any employee benefit plan.

(k)    “Independent Counsel” shall mean a law firm or a member of a law firm with significant experience in matters of corporation law and that neither presently is, nor in the past five years has been, retained to represent (i) the Company or Indemnitee in any matter material to either such party (other than with respect to matters concerning Indemnitee under this Agreement or of other indemnitees under similar indemnification agreements) or (ii) any other party to the Proceeding (as defined below) giving rise to a claim for indemnification hereunder. Notwithstanding the foregoing, “Independent Counsel” shall not include any person who, under the applicable standards of professional conduct then prevailing, would have a conflict of interest in representing either the Company or Indemnitee in an action to determine Indemnitee’s rights under this Agreement.

(l)    Indemnitee shall be deemed to have acted in a manner “not opposed to the best interests of the Company” if Indemnitee acted in good faith and in a manner Indemnitee reasonably believed to be in the best interests of the participants and beneficiaries of an employee benefit plan.

(m)    “Person” shall have the meaning as set forth in Sections 13(d) and 14(d) of the Exchange Act as in effect on the date hereof; provided, however, that “Person” shall exclude (i) the Company, (ii) any Subsidiaries (as defined below) of the Company, (iii) any employment benefit plan of the Company or of a Subsidiary (as defined below) of the Company or of any corporation owned, directly or indirectly, by the stockholders of the

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Company in substantially the same proportions as their ownership of stock of the Company and (iv) any trustee or other fiduciary holding securities under an employee benefit plan of the Company or of a Subsidiary (as defined below) of the Company or of a corporation owned directly or indirectly by the stockholders of the Company in substantially the same proportions as their ownership of stock of the Company.

(n)    “Proceeding” shall include any threatened, pending or completed action, suit, arbitration, mediation, alternate dispute resolution mechanism, investigation, inquiry, administrative hearing or any other actual, threatened or completed proceeding, whether brought in the right of the Company or otherwise and whether of a civil (including intentional or unintentional tort claims), criminal, administrative or investigative or related nature, in which Indemnitee was, is, will or might be involved as a party or otherwise by reason of the fact that Indemnitee is or was a director or officer of the Company, by reason of any action (or failure to act) taken by Indemnitee or of any action (or failure to act) on Indemnitee’s part while acting as a director or officer of the Company, or by reason of the fact that Indemnitee is or was serving at the request of the Company as a director, officer, trustee, general partner, managing member, fiduciary, employee or agent of any other Enterprise, in each case, whether or not serving in such capacity at the time any liability or expense is incurred for which indemnification, reimbursement or advancement of expenses can be provided under this Agreement but shall not include any Enforcement Proceeding pursuant to Section 14.

(o)    “Serving at the request of the Company” shall include any service as a director, officer, employee, agent or fiduciary of the Company which imposes duties on, or involves services by, such director, officer, employee, agent or fiduciary with respect to an employee benefit plan, its participants or beneficiaries.

(p)    “Subsidiary” shall mean, with respect to any Person, any corporation, limited liability company, partnership, joint venture, trust or other entity of which a majority of the voting power of the voting equity securities or equity interest is owned, directly or indirectly, by that Person.

3.    INDEMNITY IN THIRD-PARTY PROCEEDINGS. To the fullest extent permitted by applicable law, the Company shall indemnify, hold harmless and exonerate Indemnitee in accordance with the provisions of this Section 3 if Indemnitee was, is or is threatened to be made a party to or a participant (as a witness, deponent or otherwise) in any Proceeding, other than a Proceeding by or in the right of the Company to procure a judgment in its favor. Pursuant to this Section 3, Indemnitee shall be indemnified, held harmless and exonerated against all Expenses, judgments, liabilities, fines, penalties and amounts paid in settlement (including all interest, assessments and other charges paid or payable in connection with or in respect of such Expenses, judgments, liabilities, fines, penalties and amounts paid in settlement) actually and reasonably incurred by Indemnitee or on Indemnitee’s behalf in connection with such Proceeding or any claim, issue or matter therein, if Indemnitee acted in good faith and in a manner Indemnitee reasonably believed to be in or not opposed to the best interests of the Company and, in the case of a criminal Proceeding, had no reasonable cause to believe that Indemnitee’s conduct was unlawful.

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4.    INDEMNITY IN PROCEEDINGS BY OR IN THE RIGHT OF THE COMPANY. To the fullest extent permitted by applicable law, the Company shall indemnify, hold harmless and exonerate Indemnitee in accordance with the provisions of this Section 4 if Indemnitee was, is or is threatened to be made a party to or a participant (as a witness, deponent or otherwise) in any Proceeding by or in the right of the Company to procure a judgment in its favor. Pursuant to this Section 4, Indemnitee shall be indemnified, held harmless and exonerated against all Expenses actually and reasonably incurred by Indemnitee or on Indemnitee’s behalf in connection with such Proceeding or any claim, issue or matter therein, if Indemnitee acted in good faith and in a manner Indemnitee reasonably believed to be in or not opposed to the best interests of the Company. No indemnification, hold harmless or exoneration for Expenses shall be made under this Section 4 in respect of any claim, issue or matter as to which Indemnitee shall have been finally adjudged by a court of competent jurisdiction to be liable to the Company, unless and only to the extent that any court in which the Proceeding was brought or the Delaware Court shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, Indemnitee is fairly and reasonably entitled to indemnification, to be held harmless or to exoneration.

5.    INDEMNIFICATION FOR EXPENSES OF A PARTY WHO IS WHOLLY OR PARTLY SUCCESSFUL. Notwithstanding any other provisions of this Agreement except for Section 27, to the extent that Indemnitee was or is a party to (or a participant in) and is successful, on the merits or otherwise, in defending any Proceeding or in defense of any claim, issue or matter therein, in whole or in part, the Company shall, to the fullest extent permitted by applicable law, indemnify, hold harmless and exonerate Indemnitee against all Expenses actually and reasonably incurred by Indemnitee in connection therewith. If Indemnitee is not wholly successful in defense of such Proceeding (or part thereof) but is successful, on the merits or otherwise, in defense of one or more but less than all claims, issues or matters in such Proceeding, the Company shall, to the fullest extent permitted by applicable law, indemnify, hold harmless and exonerate Indemnitee against all Expenses actually and reasonably incurred by Indemnitee or on Indemnitee’s behalf in connection with each such successfully resolved claim, issue or matter. If Indemnitee is not wholly successful in defense of such Proceeding, the Company also shall, to the fullest extent permitted by applicable law, indemnify, hold harmless and exonerate Indemnitee against all Expenses reasonably incurred in connection with a claim, issue or matter related to any claim, issue or matter in defense of which Indemnitee was successful. For purposes of this Section 5 and without limiting the foregoing, the termination of any claim, issue or matter in such a Proceeding by dismissal, with or without prejudice, shall be deemed to be a successful result as to the defense of such claim, issue or matter.

6.    INDEMNIFICATION FOR EXPENSES OF A WITNESS. Notwithstanding any other provision of this Agreement except for Section 27, to the extent that Indemnitee is, by reason of Indemnitee’s Corporate Status, a witness or deponent in any Proceeding to which Indemnitee was not or is not a party or threatened to be made a party, Indemnitee shall, to the fullest extent permitted by applicable law, be indemnified, held harmless and exonerated against all Expenses actually and reasonably incurred by Indemnitee or on Indemnitee’s behalf in connection therewith.

7.    ADDITIONAL INDEMNIFICATION, HOLD HARMLESS AND EXONERATION RIGHTS. Notwithstanding any limitation in Section 3, 4 or 5, except for Section 27, the Company shall, to the fullest extent permitted by applicable law, indemnify, hold harmless and exonerate Indemnitee if Indemnitee is a party to or threatened to be made a party to any

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Proceeding (including a Proceeding by or in the right of the Company to procure a judgment in its favor) against all Expenses and judgments, fines, penalties and amounts paid in settlement (including all interest, assessments and other charges paid or payable in connection with or in respect of such Expenses, judgments, liabilities, fines, penalties and amounts paid in settlement) actually and reasonably incurred by Indemnitee in connection with the Proceeding.

8.    CONTRIBUTION IN THE EVENT OF JOINT LIABILITY.

(a)    To the fullest extent permissible under applicable law, if the indemnification, hold harmless and/or exoneration rights provided for in this Agreement are unavailable to Indemnitee in whole or in part for any reason whatsoever, the Company, in lieu of indemnifying, holding harmless or exonerating Indemnitee, shall pay, in the first instance, the entire amount incurred by Indemnitee, whether for judgments, liabilities, fines, penalties, amounts paid or to be paid in settlement and/or for Expenses, in connection with any Proceeding without requiring Indemnitee to contribute to such payment, and the Company hereby waives and relinquishes any right of contribution it may have at any time against Indemnitee.

(b)    The Company shall not enter into any settlement of any Proceeding in which the Company is jointly liable with Indemnitee (or would be if joined in such Proceeding) unless such settlement provides for a full and final release of all claims asserted against Indemnitee.

(c)    The Company hereby agrees to fully indemnify, hold harmless and exonerate Indemnitee from any claims for contribution which may be brought by officers, directors or employees of the Company other than Indemnitee who may be jointly liable with Indemnitee.

9.    EXCLUSIONS. Notwithstanding any provision in this Agreement except for Section 27, the Company shall not be obligated under this Agreement to make any indemnification, advance expenses, hold harmless or exoneration payment in connection with any claim made against Indemnitee:

(a)    for which payment has actually been received by or on behalf of Indemnitee under any insurance policy, contract, agreement or other indemnity or advancement provision or otherwise, except with respect to any excess beyond the amount actually received under any insurance policy, contract, agreement, other indemnity or advancement provision or otherwise;

(b)    for an accounting of profits made from the purchase and sale (or sale and purchase) by Indemnitee of securities of the Company within the meaning of Section 16(b) of the Exchange Act (or any successor rule) or similar provisions of state statutory law or common law; or

(c)    except as otherwise provided in Sections 14(f) through (g), prior to a Change in Control, in connection with any Proceeding (or any part of any Proceeding) initiated by Indemnitee, including any Proceeding (or any part of any Proceeding) initiated by Indemnitee against the Company or its directors, officers, employees or other

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indemnitees, unless (i) the Board authorized the Proceeding (or any part of any Proceeding) prior to its initiation or (ii) the Company provides the indemnification, advance of expenses, hold harmless or exoneration payment, in its sole discretion, pursuant to the powers vested in the Company under applicable law. Indemnitee shall seek payments or advances from the Company only to the extent that such payments or advances are unavailable from any insurance policy of the Company covering Indemnitee.

10.    ADVANCES OF EXPENSES; DEFENSE OF CLAIM.

(a)    Notwithstanding any provision of this Agreement to the contrary except for Section 27, and to the fullest extent not prohibited by applicable law, the Company shall pay the Expenses incurred by Indemnitee (or reasonably expected by Indemnitee to be incurred by Indemnitee within three (3) months) in connection with any Proceeding within ten (10) days after the receipt by the Company of a statement or statements requesting such advances from time to time, prior to the final disposition of any Proceeding. Advances shall, to the fullest extent permitted by law, be unsecured and interest free and shall be made without regard to Indemnitee’s ability to repay the Expenses and without regard to Indemnitee’s ultimate entitlement to be indemnified, held harmless or exonerated under the other provisions of this Agreement. Advances shall include any and all reasonable Expenses incurred pursuing a Proceeding to enforce this right of advancement, including Expenses incurred preparing and forwarding statements to the Company to support the advances claimed. Indemnitee shall qualify for advances upon the execution and delivery of this Agreement, which shall constitute Indemnitee’s undertaking, but only to the extent such an undertaking is required by applicable law, to repay the advanced amounts to the extent that it is ultimately determined that Indemnitee is not entitled to be indemnified, held harmless or exonerated by the Company under the provisions of this Agreement, the Charter, the Bylaws of the Company, applicable law or otherwise. This Section 10(a) shall not apply to any claim made by Indemnitee for which an indemnification, advance of expenses, hold harmless or exoneration payment is excluded pursuant to Section 9.

(b)    The Company shall be entitled to participate in the Proceeding at its own expense.

(c)    The Company shall not settle any action, claim or Proceeding (in whole or in part) which would impose any Expense, judgment, liability, fine, penalty or limitation on Indemnitee without Indemnitee’s prior written consent.

11.    PROCEDURE FOR NOTIFICATION AND APPLICATION FOR INDEMNIFICATION.

(a)    Indemnitee agrees to promptly notify the Company in writing upon being served with any summons, citation, subpoena, complaint, indictment, information or other document relating to any Proceeding, claim, issue or matter therein which may be subject to indemnification, hold harmless or exoneration rights or advancement of Expenses covered hereunder. The failure of Indemnitee to so notify the Company shall not relieve the Company of any obligation which it may have to Indemnitee under this Agreement, or otherwise.

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(b)    Indemnitee may deliver to the Company written application(s) to indemnify, hold harmless or exonerate Indemnitee in accordance with this Agreement. Such application(s) may be delivered from time to time and at such time(s) as Indemnitee deems appropriate in Indemnitee’s sole discretion. Following such a written application for indemnification by Indemnitee, Indemnitee’s entitlement to indemnification shall be determined according to Section 12(a).

12.    PROCEDURE UPON APPLICATION FOR INDEMNIFICATION.

(a)    A determination, if required by applicable law, with respect to Indemnitee’s entitlement to indemnification shall be made in the specific case by one of the following methods: (i) if no Change of Control has occurred (x) by a majority vote of the Disinterested Directors, even if less than a quorum of the Board, (y) by a committee of Disinterested Directors, even if less than a quorum of the Board, or (z) if there are no Disinterested Directors, or if such Disinterested Directors so direct, by Independent Counsel in a written opinion to the Board, a copy of which shall be delivered to Indemnitee; or (ii) if a Change in Control has occurred, by Independent Counsel in a written opinion to the Board, a copy of which shall be delivered to Indemnitee. The Company shall promptly advise Indemnitee in writing with respect to any determination that Indemnitee is or is not entitled to indemnification, including a description of any reason or basis for which indemnification has been denied. If it is so determined that Indemnitee is entitled to indemnification, payment to Indemnitee shall be made within ten (10) days after such determination. Indemnitee shall reasonably cooperate with the Person making such determination with respect to Indemnitee’s entitlement to indemnification, including providing to such Person upon reasonable advance request any documentation or information which is not privileged or otherwise protected from disclosure and which is reasonably available to Indemnitee and reasonably necessary to such determination. Any costs or Expenses (including reasonable attorneys’ fees and disbursements) incurred by Indemnitee in so cooperating with the Person making such determination shall be borne by the Company (irrespective of the determination as to Indemnitee’s entitlement to indemnification) and the Company hereby agrees to indemnify and to hold Indemnitee harmless therefrom.

(b)    In the event the determination of entitlement to indemnification is to be made by Independent Counsel pursuant to Section 12(a), the Independent Counsel shall be selected as provided in this Section 12(b). The Independent Counsel shall be selected by Indemnitee (unless Indemnitee shall request that such selection be made by the Board), and Indemnitee shall give written notice to the Company advising it of the identity of the Independent Counsel so selected and certifying that the Independent Counsel so selected meets the requirements of “Independent Counsel” as defined in Section 2. If the Independent Counsel is selected by the Board, the Company shall give written notice to Indemnitee advising Indemnitee of the identity of the Independent Counsel so selected and certifying that the Independent Counsel so selected meets the requirements of “Independent Counsel” as defined in Section 2. In either event, Indemnitee or the Company, as the case may be, may, within ten (10) days after such written notice of selection shall have been received, deliver to the Company or to Indemnitee, as the case may be, a written objection to such selection; provided, however, that such objection may

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be asserted only on the ground that the Independent Counsel so selected does not meet the requirements of “Independent Counsel” as defined in Section 2, and the objection shall set forth with particularity the factual basis of such assertion. Absent a proper and timely objection, the person so selected shall act as Independent Counsel. If such written objection is so made and substantiated, the Independent Counsel so selected may not serve as Independent Counsel unless and until such objection is withdrawn or a court of competent jurisdiction has determined that such objection is without merit. If, within twenty (20) days after submission by Indemnitee of a written request for indemnification pursuant to Section 11(b), no Independent Counsel shall have been selected and not objected to, either the Company or Indemnitee may petition the Delaware Court for resolution of any objection which shall have been made by the Company or Indemnitee to the other’s selection of Independent Counsel and/or for the appointment as Independent Counsel of a person selected by the Delaware Court, and the Person with respect to whom all objections are so resolved or the Person so appointed shall act as Independent Counsel under Section 12(a). Upon the due commencement of any judicial proceeding or arbitration pursuant to Section 14(a), Independent Counsel shall be discharged and relieved of any further responsibility in such capacity (subject to the applicable standards of professional conduct then prevailing).

(c)    The Company agrees to pay the reasonable fees and expenses of Independent Counsel and to fully indemnify and hold harmless such Independent Counsel against any and all Expenses, claims, liabilities and damages arising out of or relating to this Agreement or its engagement pursuant hereto.

13.    PRESUMPTIONS AND EFFECT OF CERTAIN PROCEEDINGS.

(a)    In making a determination with respect to entitlement to indemnification hereunder, the Person making such determination shall presume that Indemnitee is entitled to indemnification under this Agreement if Indemnitee has submitted a request for indemnification in accordance with Section 11(b), and the Company shall have the burden of proof to overcome that presumption in connection with the making by any person, persons or entity of any determination contrary to that presumption. Neither the failure of the Company (including by the Disinterested Directors or Independent Counsel) to have made a determination prior to the commencement of any action pursuant to this Agreement that indemnification is proper in the circumstances because Indemnitee has met the applicable standard of conduct, nor an actual determination by the Company (including by the Disinterested Directors or Independent Counsel) that Indemnitee has not met such applicable standard of conduct, shall be a defense to the action or create a presumption that Indemnitee has not met the applicable standard of conduct.

(b)    If the Person empowered or selected under Section 12 to determine whether Indemnitee is entitled to indemnification shall not have made a determination within thirty (30) days after receipt by the Company of the request therefor, the requisite determination of entitlement to indemnification shall, to the fullest extent permitted by law, be deemed to have been made and Indemnitee shall be entitled to such indemnification, absent (i) a misstatement by Indemnitee of a material fact, or an omission of a material fact necessary to make Indemnitee’s statement not materially misleading, in connection with the request

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for indemnification, or (ii) a final judicial determination that any or all such indemnification is expressly prohibited under applicable law; provided, however, that such thirty (30)-day period may be extended for a reasonable time, not to exceed an additional fifteen (15) days, if the Person making the determination with respect to entitlement to indemnification in good faith requires such additional time for the obtaining or evaluating of documentation and/or information relating thereto.

(c)    The termination of any Proceeding or of any claim, issue or matter therein, by judgment, order, settlement or conviction, or upon a plea of nolo contendere or its equivalent, shall not (except as otherwise expressly provided in this Agreement) of itself adversely affect the right of Indemnitee to indemnification or create a presumption that Indemnitee did not act in good faith and in a manner which Indemnitee reasonably believed to be in or not opposed to the best interests of the Company or, with respect to any criminal Proceeding, that Indemnitee had reasonable cause to believe that Indemnitee’s conduct was unlawful.

(d)    For purposes of any determination of good faith, Indemnitee shall be deemed to have acted in good faith if Indemnitee’s action is based on the records or books of account of the Enterprise, including financial statements, or on information supplied to Indemnitee by the directors, manager or officers of the Enterprise in the course of their duties, or on the advice of legal counsel for the Enterprise, the board of directors or managers of the Enterprise, any committee of the board of directors or managers of the Enterprise or any director, trustee, general partner, manager or managing member, or on information or records given or reports made to the Enterprise, the board of directors or managers of the Enterprise, any committee of the board of directors or managers of the Enterprise or any director, trustee, general partner, manager or managing member, by an independent certified public accountant or by an appraiser or other expert selected by the Enterprise, the board of directors or managers of the Enterprise, any committee of the board of directors or managers of the Enterprise or any director, trustee, general partner, manager or managing member. The provisions of this Section 13(d) shall not be deemed to be exclusive or to limit in any way the other circumstances in which Indemnitee may be deemed or found to have met the applicable standard of conduct set forth in this Agreement.

(e)    The knowledge and/or actions, or failure to act, of any other director, officer, trustee, partner, manager, managing member, fiduciary, agent or employee of the Enterprise shall not be imputed to Indemnitee for purposes of determining the right to indemnification under this Agreement.

14.    REMEDIES OF INDEMNITEE.

(a)    In the event that (i) a determination is made pursuant to Section 12 that Indemnitee is not entitled to indemnification under this Agreement, (ii) advancement of Expenses, to the fullest extent permitted by applicable law, is not timely made pursuant to Section 10, (iii) no determination of entitlement to indemnification shall have been made pursuant to Section 12(a) within thirty (30) days after receipt by the Company of the request for indemnification, (iv) payment of indemnification is not made pursuant to Sections 5, 6, 7 or the last sentence of Section 12(a) within ten (10) days after receipt by the Company of

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a written request therefor, (v) a contribution payment is not made in a timely manner pursuant to Section 8, (vi) payment of indemnification pursuant to Section 3 or 4 is not made within ten (10) days after a determination has been made that Indemnitee is entitled to indemnification, or (vii) payment to Indemnitee pursuant to any hold harmless or exoneration rights under this Agreement or otherwise is not made in accordance with this Agreement, Indemnitee shall be entitled to an adjudication by the Delaware Court to such indemnification, hold harmless, exoneration, contribution or advancement rights. Alternatively, Indemnitee, at Indemnitee’s option, may seek an award in arbitration to be conducted by a single arbitrator pursuant to the Commercial Arbitration Rules of the American Arbitration Association. Except as set forth herein, the provisions of Delaware law (without regard to its conflict of laws rules) shall apply to any such arbitration. The Company shall not oppose Indemnitee’s right to seek any such adjudication or award in arbitration. Such adjudication or arbitration proceeding is referred to herein as “Enforcement Proceeding.”

(b)    In the event that a determination shall have been made pursuant to Section 12(a) that Indemnitee is not entitled to indemnification, any Enforcement Proceeding shall be conducted in all respects as a de novo trial or arbitration on the merits and Indemnitee shall not be prejudiced by reason of that adverse determination.

(c)    In any Enforcement Proceeding, Indemnitee shall be presumed to be entitled to be indemnified, held harmless, exonerated and to receive advancement of Expenses under this Agreement and the Company shall have the burden of proving Indemnitee is not entitled to be indemnified, held harmless, exonerated and to receive advancement of Expenses, as the case may be, and the Company may not refer to or introduce into evidence any determination pursuant to Section 12(a) adverse to Indemnitee for any purpose. If Indemnitee commences an Enforcement Proceeding, Indemnitee shall not be required to reimburse the Company for any advances pursuant to Section 10 until a final determination is made with respect to Indemnitee’s entitlement to indemnification (as to which all rights of appeal have been exhausted or lapsed).

(d)    If a determination shall have been made pursuant to Section 12(a) that Indemnitee is entitled to indemnification, the Company shall be bound by such determination in Enforcement Proceeding, absent (i) a misstatement by Indemnitee of a material fact, or an omission of a material fact necessary to make Indemnitee’s statement not materially misleading, in connection with the request for indemnification, or (ii) a prohibition of such indemnification under applicable law.

(e)    The Company shall be precluded from asserting in Enforcement Proceeding that the procedures and presumptions of this Agreement are not valid, binding and enforceable and shall stipulate in any such court or before any such arbitrator that the Company is bound by all the provisions of this Agreement.

(f)    The Company shall indemnify and hold harmless Indemnitee to the fullest extent permitted by law against all Expenses (assuming for purposes of this sentence that all references to a Proceeding in the definition of Expenses were references to an Enforcement Proceeding) and, if requested by Indemnitee, shall (within ten (10) days after

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the Company’s receipt of such written request) pay to Indemnitee, to the fullest extent permitted by applicable law, such Expenses which are incurred by Indemnitee in connection with any Enforcement Proceeding brought by Indemnitee (i) to enforce Indemnitee’s rights under, or to recover damages for breach of, this Agreement or any other indemnification, hold harmless, exoneration, advancement or contribution agreement or provision of the Charter, or the Bylaws now or hereafter in effect or (ii) for recovery or advances under any insurance policy maintained by any Person for the benefit of Indemnitee, regardless of the outcome and whether Indemnitee ultimately is determined to be entitled to such indemnification, hold harmless or exoneration right, advancement, contribution or insurance recovery, as the case may be (unless such Enforcement Proceeding was not brought by Indemnitee in good faith).

(g)    Interest shall be paid by the Company to Indemnitee at a rate to be agreed between the Company and Indemnitee for amounts which the Company indemnifies, holds harmless, exonerates or advances, or is obliged to indemnify, hold harmless or exonerate or advance for the period commencing with the date on which Indemnitee requests indemnification, to be held harmless, exonerated, contribution, reimbursement or advancement of any Expenses and ending with the date on which such payment is made to Indemnitee by the Company.

15.    SECURITY. Notwithstanding anything herein to the contrary except for Section 27, to the extent requested by Indemnitee and approved by the Board, the Company may at any time and from time to time provide security to Indemnitee for the Company’s obligations hereunder through an irrevocable bank line of credit, funded trust or other collateral. Any such security, once provided to Indemnitee, may not be revoked or released without the prior written consent of Indemnitee.

16.    NON-EXCLUSIVITY; SURVIVAL OF RIGHTS; INSURANCE; SUBROGATION.

(a)    The rights of Indemnitee as provided by this Agreement shall not be deemed exclusive of any other rights to which Indemnitee may at any time be entitled under applicable law, the Charter, the Bylaws, any agreement, a vote of stockholders, a resolution of directors or otherwise. No amendment, alteration or repeal of this Agreement or of any provision hereof shall limit or restrict any right of Indemnitee under this Agreement in respect of any Proceeding (regardless of when such Proceeding is first threatened, commenced or completed) or claim, issue or matter therein arising out of, or related to, any action taken or omitted by such Indemnitee in Indemnitee’s Corporate Status prior to such amendment, alteration or repeal, except as may otherwise be expressly set forth in such amendment, alteration or repeal and mutually agreed by Indemnitee and the Company. To the extent that a change in applicable law, whether by statute or judicial decision, permits greater indemnification, hold harmless or exoneration rights or advancement of Expenses than would be afforded currently under the Charter, the Bylaws or this Agreement, it is the intent of the parties hereto that Indemnitee shall enjoy by this Agreement the greater benefits so afforded by such change. No right or remedy herein conferred is intended to be exclusive of any other right or remedy, and every other right and remedy shall be cumulative and in addition to every other right and remedy given hereunder or now or hereafter existing at law or in equity or otherwise. The assertion or employment of any right or remedy hereunder or otherwise shall not prevent the concurrent assertion or employment of any other right or remedy.

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(b)    The Delaware General Corporation Law (the “DGCL”), the Charter and the Bylaws permit the Company to purchase and maintain insurance or furnish similar protection or make other arrangements, including, but not limited to, providing a trust fund, letter of credit or surety bond (“Indemnification Arrangements”) on behalf of Indemnitee against any liability asserted against Indemnitee or incurred by or on behalf of Indemnitee or in such capacity as a director, officer, employee or agent of the Company, or arising out of Indemnitee’s status as such, whether or not the Company would have the power to indemnify Indemnitee against such liability under the provisions of this Agreement or under the DGCL, as it may then be in effect. The purchase, establishment and maintenance of any such Indemnification Arrangement shall not in any way limit or affect the rights and obligations of the Company or Indemnitee under this Agreement except as expressly provided herein, and the execution and delivery of this Agreement by the Company and Indemnitee shall not in any way limit or affect the rights and obligations of the Company or the other party or parties thereto under any such Indemnification Arrangement.

(c)    To the extent that any member of the Company Group maintains an insurance policy or policies providing liability insurance for directors, officers, trustees, partners, managers, managing members, fiduciaries, employees or agents of the Company Group or of any other Enterprise which such person serves at the request of the Company, Indemnitee shall be covered by such policy or policies in accordance with its or their terms to the maximum extent of the coverage available for any such director, officer, trustee, partner, manager, managing member, fiduciary, employee or agent under such policy or policies. If, at the time the Company receives notice from any source of a Proceeding as to which Indemnitee is a party or a participant (as a witness, deponent or otherwise), the Company has director and officer liability insurance in effect, the Company shall give prompt notice of such Proceeding to the insurers in accordance with the procedures set forth in the respective policies. The Company shall thereafter take or cause to be taken all necessary or desirable action to cause such insurers to pay, on behalf of Indemnitee, all amounts payable as a result of such Proceeding in accordance with the terms of such policies.

(d)    In the event of any payment under this Agreement, the Company, to the fullest extent permitted by law, shall be subrogated to the extent of such payment to all of the rights of recovery of Indemnitee, who shall execute all papers required and take all action necessary to secure such rights, including execution of such documents as are necessary to enable the Company to bring suit to enforce such rights.

(e)    The Company’s obligation to indemnify, hold harmless, exonerate or advance Expenses hereunder to Indemnitee who is or was serving at the request of the Company as a director, officer, trustee, partner, manager, managing member, fiduciary, employee or agent of any other Enterprise shall be reduced by any amount Indemnitee has actually received as indemnification, hold harmless or exoneration payments or advancement of expenses from such Enterprise. Notwithstanding any other provision of

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this Agreement to the contrary except for Section 27, (i) Indemnitee shall have no obligation to reduce, offset, allocate, pursue or apportion any indemnification, hold harmless, exoneration, advancement, contribution or insurance coverage among multiple parties possessing such duties to Indemnitee prior to the Company’s satisfaction and performance of all its obligations under this Agreement, and (ii) the Company shall perform fully its obligations under this Agreement without regard to whether Indemnitee holds, may pursue or has pursued any indemnification, advancement, hold harmless, exoneration, contribution or insurance coverage rights against any person or entity other than the Company.

(f)    To the extent Indemnitee has rights to indemnification, advancement of expenses and/or insurance provided by the Sponsor or its affiliates as applicable, (i) the Company shall be the indemnitor of first resort (i.e., that its obligations to Indemnitee are primary and any obligation of the Sponsor or its affiliates, as applicable, to advance expenses or to provide indemnification for the same expenses or liabilities incurred by Indemnitee are secondary), (ii) the Company shall be required to advance the full amount of expenses incurred by Indemnitee and shall be liable for the full amount of all claims, liabilities, damages, losses, costs and expenses (including amounts paid in satisfaction of judgments, in compromises and settlements, as fines and penalties and legal or other costs and reasonable expenses of investigating or defending against any claim or alleged claim) to the extent legally permitted and as required by the terms of this Agreement, the Charter, the Bylaws or another agreement of the Company, without regard to any rights Indemnitee may have against the Sponsor or its affiliates, as applicable, and (iii) the Company irrevocably waives, relinquishes and releases the Sponsor and its affiliates, as applicable, from any and all claims against them for contribution, subrogation or any other recovery of any kind in respect thereof. No advancement or payment by the Sponsor or its affiliates, as applicable, on behalf of Indemnitee with respect to any claim for which Indemnitee has sought indemnification from the Company shall affect the foregoing, and the Sponsor and its affiliates, as applicable, shall have a right of contribution and be subrogated to the extent of such advancement or payment to all of the rights of recovery of Indemnitee against the Company.

17.    DURATION OF AGREEMENT. All agreements and obligations of the Company contained herein shall continue during the period Indemnitee serves as a director or officer of the Company or as a director, officer, trustee, partner, manager, managing member, fiduciary, employee or agent of any other corporation, partnership, joint venture, trust, employee benefit plan or other Enterprise which Indemnitee serves at the request of the Company and shall continue thereafter so long as Indemnitee shall be subject to any possible Proceeding or Enforcement Proceeding (including any rights of appeal thereto) by reason of Indemnitee’s Corporate Status, whether or not Indemnitee is acting in any such capacity at the time any liability or expense is incurred for which indemnification or advancement can be provided under this Agreement.

18.    SEVERABILITY. If any provision or provisions of this Agreement shall be held to be invalid, illegal or unenforceable for any reason whatsoever, (a) the validity, legality and enforceability of the remaining provisions of this Agreement (including each portion of any section, paragraph or sentence of this Agreement containing any such provision held to be invalid, illegal or unenforceable, that is not itself invalid, illegal or unenforceable) shall not in any way be

15

affected or impaired thereby and shall remain enforceable to the fullest extent permitted by law, (b) such provision or provisions shall be deemed reformed to the extent necessary to conform to applicable law and to give the maximum effect to the intent of the parties hereto and (c) to the fullest extent possible, the provisions of this Agreement (including each portion of any section, paragraph or sentence of this Agreement containing any such provision held to be invalid, illegal or unenforceable, that is not itself invalid, illegal or unenforceable) shall be construed so as to give effect to the intent manifested thereby.

19.    ENFORCEMENT AND BINDING EFFECT.

(a)    The Company expressly confirms and agrees that it has entered into this Agreement and assumed the obligations imposed on it hereby in order to induce Indemnitee to serve as a director, officer or key employee of the Company Group, and the Company acknowledges that Indemnitee is relying upon this Agreement in serving as a director, officer or key employee of the Company Group.

(b)    Without limiting any of the rights of Indemnitee under the Charter or the Bylaws, this Agreement constitutes the entire agreement between the parties hereto with respect to the subject matter hereof and supersedes all prior agreements and understandings, oral, written and implied, between the parties hereto with respect to the subject matter hereof.

(c)    The indemnification, hold harmless, exoneration and advancement of expenses rights provided by or granted pursuant to this Agreement shall be binding upon and be enforceable by the parties hereto and their respective successors and permitted assigns (including any direct or indirect successor by purchase, merger, consolidation or otherwise to all or substantially all of the business and/or assets of the Company, but subject to such successor’s compliance with Section 19(d)), shall continue as to Indemnitee who has ceased to be a director, officer, employee or agent of the Company or a director, officer, trustee, general partner, manager, managing member, fiduciary, employee or agent of any other Enterprise at the Company’s request, and shall inure to the benefit of Indemnitee and Indemnitee’s spouse, permitted assigns, heirs, devisees, executors and administrators and other legal representatives.

(d)    The Company shall require and cause any successor (whether direct or indirect by purchase, merger, consolidation or otherwise) to all, substantially all or a substantial part, of the business and/or assets of the Company, by written agreement in form and substance satisfactory to Indemnitee, expressly to assume and agree to perform this Agreement in the same manner and to the same extent that the Company would be required to perform if no such succession had taken place.

(e)    The Company and Indemnitee agree herein that a monetary remedy for breach of this Agreement, at some later date, may be inadequate, impracticable and difficult of proof and further agree that such breach may cause Indemnitee irreparable harm. Accordingly, the parties hereto agree that Indemnitee may, to the fullest extent permitted by law, enforce this Agreement by seeking, among other things, injunctive relief and/or specific performance hereof, without any necessity of showing actual damage or

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irreparable harm and that by seeking injunctive relief and/or specific performance, Indemnitee shall not be precluded from seeking or obtaining any other relief to which Indemnitee may be entitled. The Company and Indemnitee further agree that Indemnitee shall, to the fullest extent permitted by law, be entitled to such specific performance and injunctive relief, including temporary restraining orders, preliminary injunctions and permanent injunctions, without the necessity of posting bonds or other security in connection therewith. The Company acknowledges that, in the absence of a waiver, a bond or other security may be required of Indemnitee by a court of competent jurisdiction. The Company hereby waives any such requirement of such a bond or other security to the fullest extent permitted by law.

20.    MODIFICATION AND WAIVER. No supplement, modification or amendment of this Agreement shall be binding unless executed in writing by the Company and Indemnitee. No waiver of any provision of this Agreement shall be enforceable unless in writing and signed by the party against whom it is to be enforced. No waiver of any of the provisions of this Agreement shall be deemed or shall constitute a waiver of any other provisions of this Agreement nor shall any waiver constitute a continuing waiver.

21.    NOTICES. All notices, requests, demands and other communications under this Agreement shall be in writing and shall be deemed to have been duly given (i) if delivered by hand and receipted for by the party to whom said notice or other communication shall have been directed, or (ii) mailed by certified or registered mail with postage prepaid, on the third (3rd) business day after the date on which it is so mailed:

c/o C5 Acquisition Corporation

1701 Pennsylvania Ave NW

Ste #460

Washington, D.C. 20006

Attention: David Glickman

or such other address as Indemnitee shall provide in writing to the Company.

C5 Acquisition Corporation

1701 Pennsylvania Ave NW

Ste #460

Washington, D.C. 20006

Attention: Robert Meyerson

With a copy, which shall not constitute notice, to

Paul, Weiss, Rifkind, Wharton & Garrison LLP

1285 Avenue of the Americas

New York, New York 10019

Attention: Raphael M. Russo

or to any other address as may have been furnished to Indemnitee in writing by the Company.

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22.    APPLICABLE LAW AND CONSENT TO JURISDICTION. This Agreement and the legal relations among the parties shall be governed by, and construed and enforced in accordance with, the laws of the State of Delaware, without regard to its conflict of laws rules. Except with respect to any arbitration commenced by Indemnitee pursuant to Section 14(a), to the fullest extent permitted by law, the Company and Indemnitee hereby irrevocably and unconditionally (a) agree that any action or proceeding arising out of or in connection with this Agreement shall be brought only in the Delaware Court and not in any other state or federal court in the United States of America or any court in any other country, (b) consent to submit to the exclusive jurisdiction of the Delaware Court for purposes of any action or proceeding arising out of or in connection with this Agreement, (c) waive any objection to the laying of venue of any such action or proceeding in the Delaware Court and (d) waive, and agree not to plead or to make, any claim that any such action or proceeding brought in the Delaware Court has been brought in an improper or inconvenient forum, or is subject (in whole or in part) to a jury trial. To the fullest extent permitted by law, the parties hereby agree that the mailing of process and other papers in connection with any such action or proceeding in the manner provided by Section 21 or in such other manner as may be permitted by law, shall be valid and sufficient service thereof.

23.    IDENTICAL COUNTERPARTS. This Agreement may be executed in one or more counterparts, each of which shall for all purposes be deemed to be an original but all of which together shall constitute one and the same Agreement. Only one such counterpart signed by the party against whom enforceability is sought needs to be produced to evidence the existence of this Agreement.

24.    MISCELLANEOUS. Use of the masculine pronoun shall be deemed to include usage of the feminine pronoun where appropriate. The headings of the paragraphs of this Agreement are inserted for convenience only and shall not be deemed to constitute part of this Agreement or to affect the construction thereof. The term “including” (whether or not that term is followed by the phrase “but not limited to” or “without limitation” or words of similar effect) is used in this Agreement in connection with a listing of items within a particular classification, that listing shall be interpreted to be illustrative only and shall not be interpreted as a limitation on, or exclusive listing of, the items within that classification.