Exhibit 10.5


 


July 27, 2021


 


Alpha Partners Technology Merger Corp.





228 Park Avenue South





PMB 84483





New York, NY 10003-1502


 


	Re:	Initial Public Offering


 


Ladies and Gentlemen:


 


This letter (this “Letter Agreement”) is
being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”) entered
into by and among Alpha Partners Technology Merger Corp., a Cayman Islands exempted company (the “Company”),
and Citigroup Global Markets, Inc. as representative (the “Representative”) of the several underwriters (each,
an “Underwriter” and collectively, the “Underwriters”), relating to an underwritten
initial public offering (the “Public Offering”), of up to 28,750,000 of the Company’s units (including
up to 3,750,000 units that may be purchased to cover over-allotments, if any) (the “Units”), each comprised
of one of the Company’s Class A ordinary shares, par value $0.0001 per share (the “Class A Ordinary Shares”),
and one-third of one redeemable warrant. Each whole warrant (each, a “Warrant”) entitles the holder thereof
to purchase one Class A Ordinary Share 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 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 Nasdaq. Certain capitalized terms used herein are defined in paragraph 12 hereof.


 


In order to induce the Company and the Underwriters to enter into the
Underwriting Agreement and to proceed with the Public Offering and for other good and valuable consideration, the receipt and sufficiency
of which are hereby acknowledged, each of Alpha Partners Technology Merger Sponsor LLC, a Delaware limited liability company (the “Sponsor”)
and the undersigned individuals, each of whom is, or will be, a member of the Company’s board of directors and/or management team
(each of the undersigned individuals, an “Insider” and collectively, the “Insiders”),
hereby agrees with the Company as follows:


 


		1.	The Sponsor and each Insider agrees that if the Company seeks
shareholder approval of a proposed Business Combination, then in connection with such proposed Business Combination, it, he or she shall
(i) vote any Ordinary Shares (as defined below) owned by it, him or her in favor of any proposed Business Combination and (ii) not
redeem any Ordinary Shares owned by it, him or her in connection with such shareholder 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 Ordinary Shares owned by it, him or her in connection therewith.



 


		2.	The Sponsor and each Insider hereby agrees that in the event
that the Company fails to consummate a Business Combination within 24 months from the closing of the Public Offering, or such later period
approved by the Company’s shareholders in accordance with the Company’s amended and restated memorandum and articles of association
(as it may be amended from time to time, the “Charter”), 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, redeem 100% of the Class A Ordinary Shares 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 (as defined below), including interest earned on the funds held in the Trust Account (less
taxes payable and up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding Offering Shares,
which redemption will completely extinguish all Public Shareholders’ (as defined below) rights as shareholders (including the right
to receive further liquidating distributions, if any), and (iii) as promptly as reasonably possible following such redemption, subject
to the approval of the Company’s remaining shareholders and the Company’s



 




     


     


    

board of directors, dissolve and liquidate, subject in the
case of clauses (ii) and (iii) to the Company’s obligations under Cayman Islands law to provide for claims of creditors and
in all cases subject to the other requirements of applicable law. The Sponsor and each Insider agrees to not propose any amendment to
the Charter (A) to modify the substance or timing of the Company’s obligation to allow redemption in connection with our initial
business combination or to redeem 100% of the Offering Shares if the Company does not complete a Business Combination within the required
time period set forth in the Charter or (B) with respect to any other material provisions relating to shareholders’ rights or pre-initial
Business Combination activity, unless the Company provides its Public Shareholders with the opportunity to redeem their Offering Shares
upon approval of any such amendment at a per-share price, payable in cash, equal to the aggregate amount then on deposit in the Trust
Account, including interest earned on the funds held in the Trust Account and not previously released to the Company to pay its taxes,
divided by the number of 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 held in the Trust Account or any other asset of the Company as
a result of any liquidation of the Company with respect to the Founder Units held by it, him or her. The Sponsor and each Insider hereby
further waives, with respect to any Ordinary Shares held by it, him or her, if any, any redemption rights it, he or she may have in connection
with (a) the consummation of a Business Combination, including, without limitation, any such rights available in the context of a
shareholder vote to approve such Business Combination, or (b) a shareholder vote to approve an amendment to the Charter (A) to modify
the substance or timing of the Company’s obligation to allow redemption in connection with our initial business combination or to
redeem 100% of the Offering Shares if the Company has not consummated a Business Combination within the time period set forth in the Charter
or (B) with respect to any other material provisions relating to shareholders’ rights or pre-initial Business Combination activity
or in the context of a tender offer made by the Company to purchase Offering Shares (although the Sponsor, the Insiders and their respective
affiliates shall be entitled to redemption and liquidation rights with respect to any Offering Shares it or they hold if the Company fails
to consummate a Business Combination within the time period set forth in the Charter).


 


		3.	The Sponsor and each Insider acknowledge and agree that prior
to entering into a definitive agreement for a Business Combination with a target business that is affiliated with the Sponsor, any of
the Company’s founders, the Insiders or any other directors or officers of the Company, the Company or a committee of independent
directors must obtain an opinion from an independent investment banking firm or an independent valuation or accounting firm that such
Business Combination is fair to the Company from a financial point of view.



 


		4.	During the period commencing on the effective date of the
Underwriting Agreement and ending 180 days after such date, the Sponsor and each Insider shall not, without the prior written consent
of the Representative, (i) sell, offer to sell, contract or agree to sell, hypothecate, pledge, grant any option to purchase or
otherwise dispose of or agree to dispose of, 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 (the
“Exchange Act”), and the rules and regulations of the Commission promulgated thereunder, with respect to, any
units, warrants, ordinary shares or any other securities convertible into, or exercisable, or exchangeable for, ordinary shares owned
by it, him or her, (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, warrants, ordinary shares or any other securities convertible into, or exercisable, or exchangeable
for, ordinary shares 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) publicly announce any intention to effect any transaction specified in clause (i) or (ii), provided, however,
that we may (1) issue and sell the private placement units, (2) issue and sell the additional units to cover our underwriters’
over-allotment option (if any), (3) register with the SEC pursuant to an agreement to be entered into concurrently with the issuance
and sale of the securities in this offering, the resale of the private placement units and Class A ordinary shares



 




     


     


    

issuable upon exercise of the warrants and upon conversion
of the founder shares and (4) issue securities in connection with an initial business combination. Each of the Insiders and the Sponsor
acknowledges and agrees that, prior to the effective date of any release or waiver, of the restrictions set forth in this paragraph 4
or paragraph 8 below, the Company shall announce the impending release or waiver by press release through a major news service at least
two business days before the effective date of the release or waiver. Any release or waiver granted shall only be effective two business
days after the publication date of such press release. The provisions of this paragraph will not apply if the release or waiver is effected
solely to permit a transfer not for consideration and 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.


 


		5.	In the event of the liquidation of the Trust Account upon
the failure of the Company to consummate its initial Business Combination within the time period set forth in the Charter, the Sponsor
(the “Indemnitor”) agrees to indemnify and hold harmless the Company against any and all loss, liability, claim,
damage and expense whatsoever (including, but not limited to, any and all legal or other expenses reasonably incurred in investigating,
preparing or defending against any litigation, whether pending or threatened) to which the Company may become subject as a result of
any claim by (i) any third party for services rendered or products sold to the Company or (ii) any prospective target business
with which the Company has entered into a written letter of intent, confidentiality or other similar agreement or Business Combination
agreement (a “Target”); provided, however, that such indemnification of the Company by the Indemnitor
(x) shall apply only to the extent necessary to ensure that such claims by a third party or a Target do not reduce the amount of
funds in the Trust Account to below the lesser of (i) $10.00 per Offering Share and (ii) the actual amount per Offering Share held
in the Trust Account as of the date of the liquidation of the Trust Account, if less than $10.00 per Offering Share is then held in the
Trust Account due to reductions in the value of the trust assets, less taxes payable, (y) shall not apply to any claims by a third
party or a Target which executed a waiver of any and all rights to the monies held in the Trust Account (whether or not such waiver is
enforceable) and (z) shall not apply to any claims under the Company’s indemnity of the Underwriters against certain liabilities,
including liabilities under the Securities Act of 1933, as amended. The Indemnitor shall have the right to defend against any such claim
with counsel of its choice reasonably satisfactory to the Company if, within 15 days following written receipt of notice of the claim
to the Indemnitor, the Indemnitor notifies the Company in writing that it shall undertake such defense.






 


		6.	To the extent that the Underwriters do not exercise their
over-allotment option to purchase up to an additional 3,750,000 Units within 45 days from the date of the Prospectus (and as further
described in the Prospectus), the Initial Shareholders agree to forfeit, at no cost, a number of Founder Units, to be split pro rata
between them based on the number of Founder Units they hold upon the consummation of the Public Offering, equal to 937,500 multiplied
by a fraction, (i) the numerator of which is 3,750,000 minus the number of Units purchased by the Underwriters upon the exercise
of their over-allotment option, and (ii) the denominator of which is 3,750,000. The forfeiture will be adjusted to the extent that
the over-allotment option is not exercised in full by the Underwriters so that the Founder Units will represent an aggregate of 20% of
the Company’s issued and outstanding Ordinary Shares upon the consummation of the Public Offering. The Initial Shareholders further
agree that to the extent that the size of the Public Offering is increased or decreased, the Company will purchase or sell Units or effect
a share repurchase or share capitalization, as applicable, immediately prior to the consummation of the Public Offering in such amount
as to maintain the ownership of the Initial Shareholders prior to the Public Offering at 20% of its issued and outstanding Ordinary Shares
upon the consummation of 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 in the first sentence of this paragraph shall be changed to a
number equal to 15% of the number of Class A Ordinary Shares 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 paragraph shall be adjusted to such number of Founder Units that the
Initial Shareholders would have to surrender to the Company in order for



 




     


     


    

the Initial Shareholders to hold an aggregate of 20% of the
Company’s issued and outstanding Ordinary Shares upon the consummation of the Public Offering.









		7.	The Sponsor and each Insider hereby agrees and acknowledges
that: (i) the Underwriters and the Company would be irreparably injured in the event of a breach by such Sponsor or an Insider of
its, his or her obligations under paragraphs 1, 2, 4, 5, 6, 8(a), and 8(b), 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 injunctive relief,
in addition to any other remedy that such party may have in law or in equity, in the event of such breach.






 


		8.	(a) The Sponsor and each Insider agrees that it, he or she
shall not Transfer any of their founder shares until the earliest of (A) one year after the completion of the Company’s initial
Business Combination and (B) subsequent to the Business Combination, (x) if the closing price of the Class A Ordinary
Shares equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the
like) for any 20 trading days within any 30-trading day period commencing at least 150 days after the Company’s initial Business
Combination or (y) the date on which the Company completes a liquidation, merger, amalgamation, capital stock exchange, reorganization
or other similar transaction that results in all of the Company’s Public Shareholders having the right to exchange their shares
of Class A Ordinary Shares for cash, securities or other property (the “Founder Units Lock-up Period”).






 


(b) The Sponsor, affiliates of the Sponsor and each Insider
agrees that it, he or she shall not Transfer any of their private placement units, private placement shares, private placement warrants,
founder warrants and Class A ordinary shares issued upon conversion or exercise thereof until 30 days after the completion of our initial
business combination (the “Private Placement Units Lock-up Period”, together with the Founder Units Lock-up
Period, the “Lock-up Periods”).






 


(c) Notwithstanding the provisions set forth in paragraphs
8(a) and 8(b), Transfers of the Founder Units, Private Placement Units and the Class A Ordinary Shares underlying the Private Placement
Warrants that are held by the Sponsor, affiliates of the Sponsor, any Insider or any of their permitted transferees (that have complied
with this paragraph 8(c)), are permitted (a) to the Company’s officers or directors, any affiliate or family member of any
of the Company’s officers or directors, any affiliate of the Sponsor or to any members of the Sponsor or any of their affiliates;
(b) in the case of an individual, by gift to a member of such individual’s immediate family or to a trust, the beneficiary
of which is a member of such individual’s immediate family, an affiliate of such individual or to a charitable organization; (c) in
the case of an individual, by virtue of laws of descent and distribution upon death of such individual; (d) in the case of an individual,
pursuant to a qualified domestic relations order; (e) by private sales or transfers made in connection with any forward purchase
agreement or similar arrangement or in connection with the consummation of an initial Business Combination at prices no greater than the
price at which the securities were originally purchased; (f) in the event of the Company’s liquidation prior to the completion
of an initial Business Combination; (g) by virtue of the laws of the Cayman Islands or the Sponsor’s limited liability company
agreement upon dissolution of the Sponsor; or (h) in the event of the Company’s liquidation, merger, capital stock exchange
or other similar transaction which results in all of the Company’s shareholders having the right to exchange their Class A
Ordinary Shares for cash, securities or other property subsequent to the Company’s completion of an initial Business Combination;
provided, however, that in the case of clauses (a) through (e) or (g), these permitted transferees must enter into
a written agreement with the Company agreeing to be bound by the transfer restrictions herein and the other restrictions contained in
this Agreement (including provisions relating to voting, the Trust Account and liquidating distributions).


 


		9.	The Sponsor and each Insider represents and warrants that
it, he or she has never been suspended or expelled from membership in any securities or commodities exchange or association or had a
securities or commodities license or registration denied, suspended or revoked. Each Insider’s biographical information furnished
to the Company (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 the Insider’s background and contains all
of the information required to be disclosed pursuant to Item 401 of Regulation S-K, promulgated under the Securities Act. The Sponsor
and each Insider’s questionnaire furnished to the Company is true and accurate in all respects. The Sponsor and each Insider represents
and warrants that: it, he or she is not subject to or a respondent in any legal action for, any injunction, cease-and-desist order or
order or stipulation to desist or refrain from any act or practice relating to the offering of securities in any jurisdiction; it, he
or she has never been convicted of, or pleaded guilty to, any crime (i) involving fraud, (ii) relating to any financial transaction
or handling of funds of another person, or (iii) pertaining to any dealings in any securities and it, he or she is not currently
a defendant in any such criminal proceeding.






 


		10.	Except as disclosed in the Prospectus, neither the Sponsor
nor any officer, nor any affiliate of the Sponsor or any officer, nor any director of the Company, shall receive from the Company any
finder’s fee, reimbursement, consulting fee, non-cash payments, 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 initial Business Combination: repayment of a loan and advances up to an aggregate
of $300,000 made to the Company by the Sponsor; payment to the Sponsor for certain office space, utilities, secretarial and administrative
support services provided to the Company and other expenses and obligations of the Sponsor as may be reasonably required by the Company
for a total up to $55,000 per month; reimbursement for any reasonable out-of-pocket expenses related to identifying, investigating, negotiating
and completing an initial Business Combination, and repayment of loans, if any, and on such terms as to be determined by the Company
from time to time, made by the Sponsor or an affiliate of the Sponsor or any of the Company’s officers or directors to finance
transaction costs in connection with an intended initial Business Combination, provided, 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 $1,500,000 of such loans may be convertible
into units of the post-business combination company at a price of $10.00 per unit at the option of the lender. Such units would be identical
to the Private Placement Units, including as to exercise price, exercisability and exercise period.






 


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







 


		12.	As used herein, (i) “Business Combination” shall mean a merger, capital stock exchange, asset acquisition,
stock purchase, reorganization or similar business combination, involving the Company and one or more businesses; (ii) “Ordinary
Shares” shall mean the Class A Ordinary Shares and Class B ordinary shares, par value $0.0001 per share (the “Class B
Ordinary Shares”); (iii) “Founder Units” shall mean the 7,187,500 Class B Ordinary Shares
and one-third of one warrant issued and outstanding (up to 937,500 of which are subject to complete or partial forfeiture if the over-allotment
option is not exercised by the Underwriters); (iv) “Initial Shareholders” shall mean the Sponsor and any Insider
that holds Founder Units; (v) “Private Placement Units” shall mean the 800,000 units (or 875,000 units if the
over-allotment option is exercised in full) that the Sponsor and anchor investors have agreed to purchase for an aggregate purchase price
of $8,000,000 (or $8,750,000 if the over-allotment option is exercised in full), or $10.00 per unit, in a private placement that shall
occur simultaneously with the consummation of the Public Offering; (vi) “Public Shareholders” shall mean the
holders of securities issued in the Public Offering; (vii) “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 Units shall be deposited; and (viii) “Transfer”
shall mean the (a) sale of, offer to sell, contract or agreement to sell, hypothecate,



 




     


     


    

pledge, grant of any option to purchase or otherwise dispose
of or agreement to dispose of, directly or indirectly, or establishment or increase of a put equivalent position or liquidation with respect
to or decrease of a call equivalent position within the meaning of Section 16 of the Exchange Act, and the rules and regulations
of the Commission promulgated thereunder with respect to, any security, (b) entry into any swap or other arrangement that transfers
to another, in whole or in part, any of the economic consequences of ownership of any security, whether any such transaction is to be
settled by delivery of such securities, in cash or otherwise, or (c) public announcement of any intention to effect any transaction
specified in clause (a) or (b).









		13.	The Company will maintain an insurance policy or policies providing directors’ and officers’ liability insurance, and
each Director shall be covered by such policy or policies, in accordance with its or their terms, to the maximum extent of the coverage
available pursuant to such policy or policies for any of the Company’s directors or officers.







 


		14.	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 all parties hereto.







 


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







 


		16.	Nothing in this Letter Agreement shall be construed to confer upon, or give to, any person or corporation other than the parties hereto
any right, remedy or claim under or by reason of this Letter Agreement or of any covenant, condition, stipulation, promise or agreement
hereof. All covenants, conditions, stipulations, promises and agreements contained in this Letter Agreement shall be for the sole and
exclusive benefit of the parties hereto and their successors, heirs, personal representatives and assigns and permitted transferees.







 


		17.	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.







 


		18.	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.







 


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



 




     


     


    

		20.	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 transmission.







 


		21.	This Letter Agreement shall terminate on the earlier of (i) the expiration of the Lock-up Periods or (ii) the liquidation
of the Company; provided, however, that this Letter Agreement shall earlier terminate in the event that the Public Offering is not consummated
and closed by June 30, 2021; provided further that paragraph 5 of this Letter Agreement shall survive such liquidation.



 


[Signature Page Follows]


 




     


     


    

	 	
    Sincerely,

     

    Alpha Partners Technology
    Merger Sponsor LLC

     

	 	By:	
    /s/ Matthew R. Krna

     

	 	 	Name: Matthew R. Krna
	 	 	
    Title: Manager

    

	 	 	 
	 	 	 
	 	By:	/s/ Stephen Brotman
	 	 	
    Name: Stephen Brotman

    

	 	 	 
	 	 	 
	 	By:	/s/ Sean O’Brien
	 	 	
    Name: Sean O’Brien

    

	 	 	 
	 	 	 
	 	 	 
	 	By:	/s/ Michael D. Ryan
	 	 	
    Name: Michael D. Ryan

    

	 	 	 
	 	 	 
	 	By:	/s/ Scott Grimes
	 	 	
    Name: Scott Grimes

    

	 	 	 
	 	 	 
	 	By:	/s/ John Rice
	 	 	
    Name: John Rice

    

	 	 	 
	 	 	 
	 	By:	/s/ Marcie Vu
	 	 	
    Name: Marcie Vu

    

	 	 	 
	 	 	 
	 	By:	/s/ Tracy R. Wolstencroft
	 	 	
    Name: Tracy R. Wolstencroft

    

	 	 	 
	 	 	 


[Signature Page to Letter Agreement]


 




     


     


    

	 	 	 
	 	By:	/s/ Matthew R. Krna
	 	 	Name: Matthew R. Krna
	 	 	 
	 	 	 



  








	
    Acknowledged and Agreed:

    
	 
	 	 
	Alpha Partners Technology Merger Corp.	 
	 	 
	 	 
	By:	/s/ Matthew R. Krna	 
	 	Name: Matthew R. Krna	 
	 	Title: Chief Executive Officer	 



 


 


 


[Signature Page to Letter Agreement]