Document:

Exhibit 10.4

 

March 9, 2021

 

Sandbridge X2 Corp.

725 5th Ave., 23rd Floor

New York, NY 10022

 

Re:       Initial Public Offering

 

Ladies and Gentlemen:

 

This letter (this “Letter Agreement”)
is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”)
to be entered into by and among Sandbridge X2 Corp., a Delaware corporation (the “Company”), and Citigroup
Global Markets Inc. and Deutsche Bank Securities Inc., as representatives (the “Representatives”) of
the several underwriters (each, an “Underwriter” and collectively, the “Underwriters”),
relating to an underwritten initial public offering (the “Public Offering”), of 25,300,000 of the Company’s
units (including up to 3,300,000 units that may be purchased by the Underwriters to cover over-allotments, if any) (the “Units”),
each comprising one share of the Company’s Class A common stock, par value $0.0001 per share (the “Common Stock”),
and one-third of one redeemable warrant. Each whole warrant (each, a “Warrant”) entitles the holder thereof
to purchase one share of Common Stock at a price of $11.50 per share, subject to adjustment. The Units will be sold in the Public
Offering pursuant to a registration statement on Form S-1 and 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 paragraph 13
hereof.

 

In order to induce the Company and the Underwriters to enter into
the Underwriting Agreement and to proceed with the Public Offering, to induce the PIMCO Investor and Sandbridge X2 Sponsor LLC,
a Delaware limited liability company (the “Sandbridge X2 Consortium”), to invest in Sandbridge X2 Holdings
LLC, a Delaware limited liability company (the “Sponsor”), and for other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, each of the Sponsor and TOCU XLIII LLC, a Delaware limited liability
company ( the “PIMCO Investor”), the Sandbridge X2 Consortium (together with the PIMCO Investor, the
“Investors”) and the undersigned individuals, each of whom is a member of the Company’s board of
directors and/or management team or is an advisor for the Company (each, an “Insider” and collectively,
the “Insiders”), hereby agrees with the Company as follows:

 

		1.	It is acknowledged and agreed that the Company shall not enter into a definitive agreement regarding a proposed Business Combination
without the prior consent of the Sponsor and the PIMCO Investor.

 

		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 stockholders in accordance
with the Company’s amended and restated certificate of incorporation (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 10 business days thereafter, subject to lawfully available funds
therefor, redeem 100% of the 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 (as defined below), including
interest earned on the funds held in the Trust Account and not previously released to the Company to pay its franchise and income
taxes (less up to $100,000 of interest to pay dissolution expenses), divided by the number of then outstanding Offering Shares,
which redemption will completely extinguish all Public Stockholders’ rights as stockholders (including the right to receive
further liquidation 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
other requirements of applicable law. The Sponsor and each Insider agrees not to propose any amendment to the Charter to (a) modify
the substance or timing of the Company’s obligation to allow redemption in connection with a Business Combination or to redeem
100% of the Offering Shares if the Company does not complete a Business Combination within the time period set forth in the Charter
or (b) with respect to any other provision relating to stockholders’ rights or pre-initial Business Combination activity,
unless the Company provides Public Stockholders with the opportunity to redeem their shares of Common Stock 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 franchise and income
taxes (less up to $100,000 of interest to pay dissolution expenses), 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 Shares held by it, him or her. The Sponsor and
each Insider hereby 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 vote any shares of Capital Stock owned by it, him or her in favor
of any proposed Business Combination. The Sponsor and each Insider hereby waives, with respect to any shares of Common Stock held
by it, him or her, if any, any redemption rights it, he or she may have in connection with the consummation of a Business Combination,
including, without limitation, any such rights available in the context of (i) a stockholder vote to approve such Business Combination,
or (ii) a stockholder vote to approve an amendment to the Charter to (a) modify the substance or timing of the Company’s
obligation to allow redemption in connection with a Business Combination or to redeem 100% of the Offering Shares if the Company
does not complete a Business Combination within the time period set forth in the Charter or (b) with respect to any other provision
relating to stockholders’ rights or pre-initial Business Combination activity (although the Sponsor and the Insiders shall
be entitled to 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). If the Company engages in a tender offer in connection with any proposed
Business Combination, the Sponsor and each Insider agrees that it, he or she will not seek to sell its, his or her shares of Common
Stock to the Company in connection with such tender offer.

 

		3.	The undersigned acknowledges and agrees that prior to entering into a definitive agreement for a Business Combination with
a target business that is affiliated with the undersigned or any other Insiders of the Company or their affiliates, such transaction
must be approved by a majority of the Company’s disinterested independent directors and the Company must obtain an opinion
from an independent investment banking firm or an independent 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 Representatives, (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, shares of Common Stock, Founder Shares, Warrants or any securities
convertible into, or exercisable, or exchangeable for, shares of Common Stock (but excluding Units and shares of Common Stock purchased
in the Public Offering or thereafter) 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, shares of Common Stock, Founder Shares,
Warrants or any securities convertible into, or exercisable, or exchangeable for, shares of 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) publicly announce
any intention to effect any transaction specified in clause (i) or (ii). 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.

 

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		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”), which for purposes of
clarification shall not extend to any other shareholders, members or managers of the Sponsor, or any of the other undersigned,
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 shall (x) apply only to the extent
necessary to ensure that such claims by a third party for services rendered (other than the Company’s independent public
accountants) or products sold to the Company 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 interest earned on the funds in the Trust Account which may be withdrawn to pay franchise
and income taxes, (y) 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) 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
“Securities Act”). In the event that any such executed waiver is deemed to be unenforceable against such
third party, the Indemnitor shall not be responsible to the extent of any liability for such third party claims. 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 3,300,000 Units
within 45 days from the date of the Prospectus (and as further described in the Prospectus) in full, the Sponsor agrees to forfeit,
at no cost, a number of Founder Shares in the aggregate equal to 825,000 multiplied by a fraction (i) the numerator of which is
3,300,000 minus the number of Units purchased by the Underwriters upon the exercise of their over-allotment option, and (ii) the
denominator of which is 3,300,000. For clarity, the forfeiture shall yield the result that the Initial Stockholders will own an
aggregate of 20% of the Company’s issued and outstanding shares of Capital Stock after the Public Offering (assuming, for
purposes of this calculation, that the Initial Stockholders do not purchase any Units in the Public Offering).

 

		7.	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, 3, 4, 5, 6, 8(a),
8(b) and, solely as to each D&O Insider, 10, 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. The Investors shall also be entitled to seek injunctive
relief, in addition to any other remedy that such parties may have in law or in equity, in the event of a breach under this Letter
Agreement.

 

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		8.	(a)       The Sponsor and each Insider agrees that it, he or she shall not Transfer any Founder Shares (or shares of Common Stock
issuable upon conversion thereof) until the earlier of (A) one year after the completion of the Company’s initial Business
Combination or (B) subsequent to the Business Combination, (x) if the last 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 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, capital stock exchange, reorganization or other similar transaction
that results in all of the Company’s stockholders having the right to exchange their shares of Common Stock for cash, securities
or other property (the “Founder Shares Lock-up Period”).

 

(b)       The
Sponsor and each Insider agrees that it, he or she shall not Transfer any Private Placement Warrants (or shares of Common Stock
issued or issuable upon the exercise of the Private Placement Warrants), until 30 days after the completion of the Company’s
initial Business Combination (the “Private Placement Warrants Lock-up Period”, together with the Founder
Shares Lock-up Period, the “Lock-up Periods”).

 

(c)       Notwithstanding
the provisions set forth in paragraphs 8(a) and (b), Transfers of the Founder Shares, Private Placement Warrants and shares of
Common Stock issued or issuable upon the exercise or conversion of the Private Placement Warrants or the Founder Shares and that
are held by 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 affiliates or family members of any of the Company’s
officers or directors, any affiliate of the Sponsor or to any member(s) of the Sponsor, any affiliates of such members and funds
and accounts advised by such members; (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 the laws of descent and distribution upon death
of such person; (d) in the case of an individual, pursuant to a qualified domestic relations order; (e) by private sales
or transfers made in connection with the consummation of 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 State of Delaware 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,
reorganization or other similar transaction which results in all of the Company’s stockholders having the right to exchange
their shares of Common Stock for cash, securities or other property subsequent to the 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.

 

		9.	Prior to the consummation of the initial Business Combination, the PIMCO Investor and the Sandbridge X2 Consortium shall have
the right to appoint one representative to the Board of Directors of the Company and two observers of the Board of Directors of
the Company commencing on the effective date of the registration statement on Form S-1 related to the Public Offering until the
earlier to occur of (i) any Business Combination and (ii) either the Sandbridge X2 Consortium or the PIMCO Investor transferring
or disposing of any of their membership interests in the Sponsor, other than to an affiliate of such investor. The Sandbridge X2
Consortium shall have the right to nominate three independent directors for election to the Board of Directors of the Company,
with such candidates subject to the approval of the PIMCO Investor (such approval not to be unreasonably withheld). The Sponsor
agrees to vote the Founder Shares in favor of (a) each of the Sandbridge X2 Consortium’s and the PIMCO Investor’s appointees
to the Board when each of the Sandbridge X2 Consortium and the PIMCO Investor’s appointees are up for election and (b) the
independent director nominees designated by the Sandbridge X2 Consortium and approved by the PIMCO Investor when each of such nominees
is up for election.

 

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		10.	Each of the Insiders who is or is nominated to be a director or officer of the Company (each, a “D&O Insider”)
agrees to serve in such capacity until the earlier of the consummation by the Company of an initial Business Combination, the liquidation
of the Company, or his or her removal, death or incapacity. The Sponsor and each D&O 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 D&O Insider’s biographical information
furnished to the Company (including any such information included in the Prospectus) is true and accurate in all material respects
and does not omit any material information with respect to the D&O 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. Each D&O Insider’s
questionnaire furnished to the Company and the Representatives is true and accurate in all material respects. Each D&O 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.

 

		11.	Except as disclosed in the Prospectus, neither the Sponsor nor any Insider, nor any affiliate of the Sponsor or any Insider,
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).

 

		12.	The Company, the Sponsor, each Investor and each Insider represents and warrants, severally and not jointly, that it, he or
she has full right and power, without violating any agreement to which it, he or she 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, advisor and/or director on the board of directors of the Company and hereby consents to being
named in the Prospectus as an officer, advisor and/or director of the Company.

 

		13.	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) “Capital
Stock” shall mean, collectively, the Common Stock and the Founder Shares; (iii) “Founder Shares”
shall mean the 6,325,000 shares of the Company’s Class B common stock, par value $0.0001 per share, issued to the Initial
Stockholders (up to 825,000 shares of which are subject to complete or partial forfeiture by the Sponsor if the over-allotment
option is not exercised in full by the Underwriters); (iv) “Initial Stockholders” shall mean the
Sponsor and any Insider that holds Founder Shares; (v) “Private Placement Warrants” shall mean the Warrants
to purchase up to 4,266,667 shares of Common Stock of the Company (or 4,706,667 shares of Common Stock if the over-allotment option
is exercised in full by the Underwriters) that the Sponsor has agreed to purchase for an aggregate purchase price of $6,400,000
(or $7,060,000 if the over-allotment option is exercised in full by the Underwriters), or $1.50 per Warrant, in a private placement
that shall occur simultaneously with the consummation of the Public Offering; (vi) “Public Stockholders”
shall mean the holders of securities issued in the Public Offering; (vii) “Trust Account” shall mean
the trust account into which the net proceeds of the Public Offering and certain proceeds from the sale of the Private Placement
Warrants 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).

 

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		14.	The Company will maintain an insurance policy or policies providing directors’ and officers’ liability insurance,
and each D&O Insider 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 of the Company’s directors or officers.

 

		15.	The Company shall not, without the prior consent of each of the Investors, (i) include the name of the Investors or any of
their respective affiliates in any disclosure, marketing materials, tombstones and other usages in connection with the Public Offering,
otherwise related to the activities of the Company, or in connection with the initial Business Combination or thereafter; (ii)
amend any term of the Company’s constitutive documents, (iii) amend any term of the Founder Shares, including, but not limited
to, the economic terms or terms regarding transferability; (iv) amend any term of the Private Placement Warrants, including, but
not limited to, economic terms or terms regarding transferability; (v) amend any terms of the Trust Account, or (vi) appoint any
advisor of the Company.

 

		16.	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.

 

		17.	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, except that any of the Investors may assign its rights, interests and obligations hereunder
to any affiliate of such Investor. 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
Company, the Sponsor, the Investors and each Insider and their respective successors, heirs and assigns and permitted transferees.

 

		18.	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.

 

		19.	This Letter Agreement may be executed in any number of original, facsimile or other electronic 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.

 

		20.	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.

 

		21.	This Letter Agreement shall be governed by and construed and enforced in accordance with the laws of the State of Delaware,
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 Wilmington, in the State of Delaware, 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.

 

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		22.	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 e-mail transmission.

 

		23.	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 that paragraph 5 of this Letter Agreement shall survive such liquidation.

 

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	 	Sincerely,
	 	 
	 	sandbridge x2 holdings LLC
	 	 
	 	By:	/s/ Richard Henry
	 	 	Name:	Richard Henry
	 	 	Title:	Manager

 

	 	TOCU XLIII LLC
	 	 
	 	By:	/s/ Russell D. Gannaway
	 	 	Name: 	Russell D. Gannaway
	 	 	Title: 	Authorized Person

 

	 	SANDBRDIGE X2 CONSORTIUM, LLC
	 	 
	 	By: 	/s/ Richard Henry
	 	Name: 	Richard Henry
	 	Title: 	Manager

 

[Signature
Page to Insider Letter]

 

    	 

     

    

 

	 	/s/ Ken Suslow
	 	Ken Suslow
	 	 
	 	/s/ Domenico De Sole
	 	Domenico De Sole
	 	 
	 	/s/ Jamie Weinstein
	 	Jamie Weinstein
	 	 
	 	/s/ Richard Henry
	 	Richard Henry
	 	 
	 	/s/ Joe Lamastra
	 	Joe Lamastra
	 	 
	 	/s/ Ramez Toubassy
	 	Ramez Toubassy
	 	 
	 	/s/ Tommy Hilfiger
	 	Tommy Hilfiger

 

[Signature Page to Insider Letter]

 

    	 

     

    

 

	Acknowledged and Agreed:	 
	 	 
	sANDBRDIGE X2 CORP.	 
	 	 
	By:	/s/ Richard Henry	 
	 	Name:	Richard Henry	 
	 	Title:	Chief Financial Officer	 

 

[Signature
Page to Insider Letter]Exhibit 10.5

 

SANDBRIDGE
X2 CORP.

725 5th Ave., 23rd
Floor

New York, NY 10022

March 9, 2021

Sandbridge X2 Holdings LLC

725 5th Ave., 23rd Floor

New York, NY 10022

 

		Re:	Administrative Services Agreement

 

Ladies and Gentlemen:

 

This letter agreement by and between Sandbridge
X2 Corp. (the “Company”) and Sandbridge Capital, LLC (the “Sandbridge”), dated as of the
date hereof, will confirm our agreement that, commencing on the effective date (the “Effective Date”) of the
Registration Statement on Form S-1 filed with the U.S. Securities and Exchange Commission (the “Registration Statement”)
for the Company’s initial public offering and continuing until the earlier of the consummation by the Company of an initial
business combination or the Company’s liquidation (in each case as described in the Registration Statement) (such earlier
date hereinafter referred to as the “Termination Date”):

 

		i.	Sandbridge shall make available, or cause to be made available, to the Company, at 725 5th Ave., 23rd
Floor, New York, NY 10022 (or any successor location or other existing office locations), certain office space, utilities and secretarial
and administrative support as may be reasonably required by the Company. In exchange therefor, the Company shall pay Sandbridge
the sum of $10,000 per month commencing on the Effective Date and continuing monthly thereafter until the Termination Date; and

 

		ii.	Sandbridge hereby irrevocably waives any and all right, title, interest, causes of action and claims of any kind as a result
of, or arising out of, this letter agreement (each, a “Claim”) in or to, and any and all right to seek payment
of any amounts due to it out of, the trust account established for the benefit of the public stockholders of the Company and into
which substantially all of the proceeds of the Company’s initial public offering will be deposited (the “Trust Account”),
and hereby irrevocably waives any Claim it may have in the future, which Claim would reduce, encumber or otherwise adversely affect
the Trust Account or any monies or other assets in the Trust Account, and further agrees not to seek recourse, reimbursement, payment
or satisfaction of any Claim against the Trust Account or any monies or other assets in the Trust Account for any reason whatsoever.

 

This letter agreement constitutes the entire
agreement and understanding of the parties hereto in respect of its subject matter 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 amended,
modified or waived as to any particular provision, except by a written instrument executed by all parties hereto.

 

No party hereto may assign either this letter
agreement or any of its rights, interests, or obligations hereunder without the prior written approval of the other party. 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.

 

Any litigation between the parties (whether
grounded in contract, tort, statute, law or equity) shall be governed by, construed in accordance with, and interpreted pursuant
to the laws of the State of New York, without giving effect to its choice of laws principles.

 

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

 

    	 		 

     

    

 

	 	Very truly yours,
	 	SANDBRIDGE X2 CorP.
	 	 
	 	By:	/s/ Richard Henry
	 	Name:	 Richard Henry
	 	Title:	Chief Financial Officer

 

	AGREED TO AND ACCEPTED BY:	 
	SANDBRIDGE CAPITAL, LLC	 
	 	 
	By: 	/s/ Richard Henry	 
	Name: 	 Richard Henry	 
	Title: 	Chief Financial Officer	 

 

[Signature Page to Administrative Services
Agreement]

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