Document:

Exhibit 10.1

  

FORM OF SUBSCRIPTION
AGREEMENT

 

This SUBSCRIPTION AGREEMENT
(this “Subscription Agreement”) is entered into on February [_], 2021, by and between NextGen Acquisition
Corporation, a Cayman Islands exempted company (“NextGen”),
and the undersigned subscriber (the “Investor”).

 

WHEREAS, this Subscription
Agreement is being entered into in connection with the Agreement and Plan of Merger, dated as of the date hereof (as may be amended,
supplemented or otherwise modified from time to time, the “Transaction
Agreement”), by and among NextGen, Xos, Inc., a Delaware corporation (the “Company”),
Sky Merger Sub I, Inc., a Delaware corporation (“NextGen
Merger Sub”), and the other parties thereto, pursuant to which, among other things, NextGen Merger Sub will merge
with and into the Company, with the Company as the surviving company in the merger and, after giving effect to such merger, becoming
a wholly owned subsidiary of NextGen, and NextGen will change its name to “Xos, Inc.”, on the terms and
subject to the conditions therein (the “Transaction”);

 

WHEREAS, prior to the
closing of the Transaction (and as more fully described in the Transaction Agreement), NextGen will domesticate as a Delaware corporation
in accordance with Section 388 of the General Corporation Law of the State of Delaware and Part XII of the Cayman Islands
Companies Law (2020 Revision) (the “Domestication”);

 

WHEREAS, in connection
with the Transaction, NextGen is seeking commitments from interested investors to purchase, following the Domestication and prior
to the closing of the Transaction, shares of NextGen’s Class A common stock, par value $0.0001 per share, as such shares
will exist as common stock following the Domestication (the “Shares”),
in a private placement for a purchase price of $10.00 per share (the “Per Share Subscription Price”);

 

WHEREAS, the aggregate
purchase price to be paid by the Investor for the subscribed Shares (as set forth on the signature page hereto) is referred to
herein as the “Subscription Amount;”

 

WHEREAS, substantially
concurrently with the execution of this Subscription Agreement, NextGen is entering into: (a) separate subscription agreements
with certain other investors that may include existing directors, officers or securityholders (including, for the avoidance of
doubt, holders of convertible securities) of NextGen, NextGen Sponsor LLC, a Cayman Islands limited liability company, the Company
and/or their respective affiliates with an aggregate purchase price of $500,000 (collectively, the “Insider PIPE Investors”
and, such investment, the “Insider PIPE Investment”) substantially similar to this Subscription Agreement; and
(b) separate subscription agreements (collectively, the “Other Subscription Agreements”) substantially similar
to this Subscription Agreement with certain investors (other than the Insider PIPE Investors) with an aggregate purchase price
of $219,500,000 (inclusive of the Subscription Amount) (together with the Insider PIPE Investment, the “PIPE Investment”).

 

NOW, THEREFORE, in
consideration of the foregoing and the mutual representations, warranties and covenants, and subject to the conditions, set forth
herein, and intending to be legally bound hereby, each of the Investor and NextGen acknowledges and agrees as follows:

 

1. Subscription.
Subject to the terms and conditions hereof, the Investor hereby subscribes for and agrees to purchase from NextGen the number of
Shares set forth on the signature page of this Subscription Agreement on the terms and subject to the conditions provided for herein.
The Investor acknowledges and agrees that, as a result of the Domestication, the Shares that will be issued pursuant hereto shall
be shares of common stock in a Delaware corporation (and not shares in a Cayman Islands exempted company).

 

     

     

    

 

2. Closing.
The closing of the sale of the Shares contemplated hereby (the “Closing”)
shall occur on the closing date of the Transaction (the “Closing
Date”) and be conditioned upon the prior or substantially concurrent consummation of the Transaction and satisfaction
of the other conditions set forth in Section 3 hereof. Upon delivery of written notice from (or on behalf of) NextGen to
the Investor (the “Closing Notice”),
that NextGen reasonably expects all conditions to the closing of the Transaction to be satisfied or waived on an expected closing
date that is not less than five (5) business days from the date on which the Closing Notice is delivered to the Investor, the
Investor shall deliver to NextGen, one (1) business day prior to the expected closing date specified in the Closing Notice (or
such other date agreed to in writing by NextGen), the Subscription Amount by wire transfer of United States dollars in immediately
available funds to the account(s) specified by NextGen in the Closing Notice. On the Closing Date, NextGen shall issue the Shares
to the Investor and subsequently cause the Shares to be registered in book-entry form in the name of the Investor on NextGen’s
share register. For purposes of this Subscription Agreement, “business
day” shall mean a day, other than a Saturday, Sunday or other day on which commercial banks in New York, New York
or governmental authorities in the Cayman Islands (for so long as NextGen remains domiciled in Cayman Islands) are authorized
or required by law to close. Prior to or at the Closing Date, Investor shall deliver to NextGen a duly completed and executed
Internal Revenue Service Form W-9 or appropriate Form W-8. In the event the Closing Date does not occur within two (2) business
days after the expected closing date specified in the Closing Notice, NextGen shall promptly (but not later than two (2) business
days after the expected closing date specified in the Closing Notice) return the Subscription Amount to the Investor by wire transfer
of U.S. dollars in immediately available funds to the account specified by the Investor, and any book-entries for the Shares shall
be deemed cancelled; provided that, unless this Subscription Agreement has been terminated pursuant to Section 8
hereof, such return of funds shall not terminate this Subscription Agreement or relieve the Investor of its obligation to purchase
the Shares at the Closing. For the avoidance of doubt, if any termination hereof occurs after the delivery by the Investor of
the Subscription Amount for the Shares and prior to the Closing, NextGen shall promptly (but not later than three (3) business
days thereafter) return the Purchase Price to Investor without any deduction for or on account of any tax, withholding, charges
or set-off.

 

3. Closing Conditions.
The obligation of the parties hereto to consummate the purchase and sale of the Shares pursuant to this Subscription Agreement
is subject to the satisfaction of the following conditions:

 

(a) there shall not be
in force any injunction or order enjoining or prohibiting the issuance and sale of the Shares under this Subscription Agreement;

 

(b) solely with respect
to the Investor’s obligation to close, the terms of the Transaction Agreement (including any minimum cash condition and the
other conditions thereto) shall not have been amended or waived in a manner that would reasonably be expected to materially and
adversely affect the Investor, without the consent of the Investor;

 

(c) all conditions precedent
to the closing of the Transaction as set forth in the Transaction Agreement, including all necessary approvals of NextGen’s
shareholders and regulatory approvals, if any, shall have been satisfied or waived (as determined by the parties to the Transaction
Agreement and other than those conditions that, by their nature, (x) may only be satisfied at the closing of the Transaction (including
to the extent that any such condition is dependent upon the consummation of the purchase and sale of the Shares pursuant to this
Subscription Agreement and the Other Subscription Agreements), but subject to the satisfaction or waiver of such conditions as
of the Closing, or (y) will be satisfied by the Closing and the closing of the transactions contemplated by the Other Subscription
Agreements);

 

(d) (i) solely with respect
to the Investor’s obligation to close, the representations and warranties made by NextGen, and (ii) solely with respect to
NextGen’s obligation to close, the representations and warranties made by the Investor, in each case, in this Subscription
Agreement shall be true and correct in all material respects as of the Closing Date other than (x) those representations and warranties
qualified by materiality, Material Adverse Effect or similar qualification, which shall be true and correct in all respects as
of the Closing Date and (y) those representations and warranties expressly made as of an earlier date, which shall be true and
correct in all material respects (or, if qualified by materiality, Material Adverse Effect or similar qualification, all respects)
as of such date, in each case without giving effect to the consummation of the Transactions;

 

(e) solely with respect
to NextGen’s obligation to close, the Investor shall have wired the Subscription Amount in accordance with Section 2
of this Subscription Agreement and otherwise performed or complied in all material respects all of its covenants and agreements
contained in this Subscription Agreement that are required to be performed or complied with by the Investor on or before the Closing
Date;

 

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(f) solely with respect
to the Investor’s obligation to close, NextGen shall have performed or complied in all material respects all of its covenants
and agreements contained in this Subscription Agreement that are required to be performed or complied with by NextGen on or before
the Closing Date; and

 

(g) no suspension of
the qualification of the Class A ordinary shares, par value $0.0001 per share, of NextGen (“Class A Shares”)
for offering or sale or trading on the Nasdaq Stock Market LLC (“Nasdaq”), and no initiation or threatening
of any proceedings for any of such purposes or delisting, shall have occurred, and the Shares shall be approved for listing on
Nasdaq or the New York Stock Exchange (“NYSE”), subject to official notice of issuance.

 

4. Further Assurances.
At the Closing, the parties hereto shall execute and deliver such additional documents and take such additional actions as the
parties deem to be reasonably necessary or advisable in order to consummate the subscription as contemplated by this Subscription
Agreement (the “Subscription”).

 

5. NextGen Representations,
Warranties and Agreements. NextGen represents and warrants to, and agrees with, the Investor that:

 

(a) NextGen is an exempted
company duly incorporated, validly existing and in good standing under the laws of the Cayman Islands. NextGen has all power (corporate
or otherwise) and authority to own, lease and operate its properties and conduct its business as presently conducted and to enter
into, deliver and perform its obligations under this Subscription Agreement. As of the Closing Date, following the Domestication,
NextGen will be duly incorporated, validly existing as a corporation and in good standing under the laws of the State of Delaware.

 

(b) As of the Closing
Date, the Shares will be duly authorized and, when issued and delivered to the Investor against full payment therefor in accordance
with the terms of this Subscription Agreement, the Shares will be validly issued, fully paid and non-assessable and will not have
been issued in violation of or subject to any liens or preemptive or similar rights created under NextGen’s certificate of
incorporation (as in effect at such time of issuance) or under the Delaware General Corporation Law (other than those arising under
this Subscription Agreement or applicable securities laws).

 

(c) This Subscription
Agreement has been duly authorized, executed and delivered by NextGen and, assuming that this Subscription Agreement constitutes
the valid and binding agreement of the Investor, this Subscription Agreement constitutes a valid and binding agreement of NextGen
and is enforceable against NextGen in accordance with its terms, except as may be limited or otherwise affected by (i) bankruptcy,
insolvency, fraudulent conveyance, reorganization, moratorium or other laws relating to or affecting the rights of creditors generally,
or (ii) principles of equity, whether considered at law or equity.

 

(d) The issuance and
sale by NextGen of the Shares and the compliance by NextGen with all of the provisions pursuant to this Subscription Agreement
and the consummation of the transactions contemplated hereby will not conflict with or result in a breach or violation of any of
the terms or provisions of, or constitute a default under, or result in the creation or imposition of any lien, charge or encumbrance
upon any of the property or assets of NextGen or any of its subsidiaries pursuant to the terms of (i) any indenture, mortgage,
deed of trust, loan agreement, lease, license or other agreement or instrument to which NextGen or any of its subsidiaries is a
party or by which NextGen or any of its subsidiaries is bound or to which any of the property or assets of NextGen is subject that
would reasonably be expected to have a material adverse effect on the business, financial condition or results of operations of
NextGen and its subsidiaries, taken as a whole (a “Material
Adverse Effect”), or materially affect the validity of the Shares or the legal authority of NextGen to comply
in all material respects with its obligations under this Subscription Agreement; (ii) result in any violation of the provisions
of the organizational documents of NextGen; or (iii) result in any violation of any statute or any judgment, order, rule or
regulation of any court or governmental agency or body, domestic or foreign, having jurisdiction over NextGen or any of its properties
that would reasonably be expected to have a Material Adverse Effect or materially affect the validity of the Shares or the legal
authority of NextGen to comply in all material respects with its obligations under this Subscription Agreement.

 

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(e) As of their respective
filing dates, all reports required to be filed by NextGen with the U.S. Securities and Exchange Commission (the “SEC”)
since October 9, 2020 (the “SEC Reports”) complied in all material respects with the applicable requirements
of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and the rules and regulations of the
SEC promulgated thereunder and none of the SEC Reports, when filed, contained any untrue statement of material fact or omitted
to state a material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances
under which they were made, not misleading. The financial statements of NextGen included in the SEC Reports comply in all material
respects with applicable accounting requirements and the rules and regulations of the SEC with respect thereto as in effect at
the time of filing and fairly present in all material respects the financial position of NextGen as of and for the dates thereof
and the results of operations and cash flows for the periods then ended, subject, in the case of unaudited statements, to normal,
year-end audit adjustments. As of the date hereof, there are no material outstanding or unresolved comments in comment letters
received by NextGen from the staff of the Division of Corporation Finance of the SEC with respect to any of the SEC Reports.

 

(f) Assuming the accuracy
of the Investor’s representations and warranties set forth in Section 6 of this Subscription Agreement, NextGen is
not required to obtain any consent, waiver, authorization or order of, give any notice to, or make any filing or registration with,
any court or other federal, state, local or other governmental authority, self-regulatory organization or other person in connection
with the issuance of the Shares pursuant to this Subscription Agreement, other than (i)  filings with the SEC, (ii) filings
required by applicable state securities laws, (iii) the filings required in accordance with Section 12 of this
Subscription Agreement; (iv) those required by the NYSE or Nasdaq, including with respect to obtaining approval of NextGen’s
stockholders, and (v) the failure of which to obtain would not be reasonably be expected to have, individually or in the aggregate,
a Material Adverse Effect or have a material adverse effect on NextGen’s ability to consummate the transactions contemplated
hereby, including the sale and issuance of the Shares.

 

(g) As of the date hereof,
NextGen has not received any written communication from a governmental authority that alleges that NextGen is not in compliance
with or is in default or violation of any applicable law, except where such non-compliance, default or violation would not reasonably
be expected to have, individually or in the aggregate, a Material Adverse Effect.

 

(h) As of the date hereof,
there is no (i) suit, action, claim, proceeding or arbitration before a governmental authority or arbitrator pending, or, to the
knowledge of NextGen, threatened against NextGen or (ii) judgment, decree, injunction, ruling or order of any governmental entity
or arbitrator outstanding against NextGen, except, in each case, for such matters as would not be reasonably expected to have,
individually or in the aggregate, a Material Adverse Effect.

 

(i) Assuming the accuracy
of the Investor’s representations and warranties set forth in Section 6 of this Subscription Agreement, no registration
under the Securities Act of 1933, as amended (the “Securities Act”), is required for the offer and sale of the
Shares by NextGen to the Investor.

 

(j) Neither NextGen nor
any person acting on its behalf has offered or sold the Shares by any form of general solicitation or general advertising in violation
of the Securities Act.

 

(k) As of the date hereof,
the authorized share capital of NextGen consists of (i) 5,000,000 undesignated preferred shares, par value $0.0001 per share (“Preferred
Shares”), (ii) 500,000,000 Class A Shares and (iii) 50,000,000 Class B ordinary shares, par value $0.0001 per share (“Class
B Shares”). As of the date hereof: (1) no Preferred Shares are issued and outstanding, (2) 35,000,000 Class A Shares
are issued and outstanding, (3) 8,750,000 Class B Shares are issued and outstanding and (4) 17,666,667 warrants, each entitling
the holder thereof to purchase one Class A Share at an exercise price of $11.50 per Class A Share, are outstanding.

 

(l) As of the date hereof,
the issued and outstanding Class A Shares are registered pursuant to Section 12(b) of the Exchange Act and are listed for trading
on Nasdaq. There is no suit, action, proceeding or investigation pending or, to the knowledge of NextGen, threatened against NextGen
by Nasdaq or the SEC with respect to any intention by such entity to deregister NextGen’s Class A Shares or prohibit or terminate
the listing of NextGen’s Class A Shares on Nasdaq. NextGen has taken no action that is designed to terminate the registration
of its Class A Shares under the Exchange Act. Following the Domestication, the Shares are expected to be registered for resale
under the Securities Act.

 

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(m) Other than as set
forth in the Transaction Agreement, there are no securities or instruments issued by or to which NextGen is a party containing
anti-dilution or similar provisions that will be triggered by the issuance of (i) the Shares or (ii) the shares to be issued pursuant
to any Other Subscription Agreement that have not been or will not be validly waived on or prior to the Closing Date.

 

(n) NextGen is not under
any obligation to pay any broker’s fee or commission in connection with the sale of the Shares other than to the Placement
Agent (as defined below).

 

(o) The Other Subscription
Agreements reflect the same Per Share Subscription Price and other terms and conditions with respect to the purchase of the Shares
that are no more favorable to such subscriber thereunder than the terms of this Subscription Agreement, other than terms particular
to the regulatory requirements of such subscriber or its affiliates or related funds, and there is no side letter or other agreement
that modifies such Per Share Subscription Price and such other terms and conditions with respect to the purchase of the Shares.
For the avoidance of doubt, this Section 5(o) shall not apply to any document entered into in connection with the Insider
PIPE Investment; provided, however, that such Insider PIPE Investment shall be with respect to the same class of Shares
being acquired by the Investor hereunder and at the same Per Share Subscription Price.

 

6. Investor Representations,
Warranties and Agreements. The Investor represents and warrants to, and agrees with, NextGen that:

 

(a) The Investor (i) is
a “qualified institutional buyer” (as defined in Rule 144A under the Securities Act) or an institutional “accredited
investor” (within the meaning of Rule 501(a) (1), (2), (3) or (7) under the Securities Act), in each case, satisfying
the applicable requirements set forth on Schedule A, (ii) is acquiring the Shares only for his, her or its own
account and not for the account of others, or if the Investor is subscribing for the Shares as a fiduciary or agent for one or
more investor accounts, the Investor has full investment discretion with respect to each such account, and the full power and authority
to make the acknowledgements, representations and agreements herein on behalf of each owner of each such account, and (iii) is
acquiring the Shares for investment purposes only and is not acquiring the Shares with a view to, or for offer or sale in connection
with, any distribution thereof in violation of the Securities Act (and shall provide the requested information set forth on Schedule A).
The Investor is not an entity formed for the specific purpose of acquiring the Shares and the Investor is an “institutional
account” as defined by FINRA Rule 4512(c).

 

(b) The Investor acknowledges
and agrees that the Shares are being offered in a transaction not involving any public offering within the meaning of the Securities
Act, that the Shares have not been registered under the Securities Act and that NextGen is not required to register the Shares
except as set forth in Section 7 of this Subscription Agreement. The Investor acknowledges and agrees that, unless
the Shares are registered pursuant to an effective registration statement under the Securities Act, the Shares may not be offered,
resold, transferred, pledged or otherwise disposed of by the Investor except (i) to NextGen or a subsidiary thereof, (ii) to
non-U.S. persons pursuant to offers and sales that occur outside the United States within the meaning of Regulation S under the
Securities Act or (iii) pursuant to another applicable exemption from the registration requirements of the Securities Act,
and, in each case, in accordance with any applicable securities laws of the states of the United States and other applicable jurisdictions,
and that any certificates representing the Shares shall contain a restrictive legend to the following effect:

 

		(i)	THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED
UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY STATE OR OTHER JURISDICTION, AND MAY
NOT BE SOLD OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM. THE HOLDER WILL NOTIFY ANY SUBSEQUENT
PURCHASER OF THIS SECURITY FROM IT OF THE RESALE RESTRICTIONS REFERRED TO ABOVE.

 

(c) The Investor acknowledges
and agrees that the Shares will be subject to these securities law transfer restrictions and, as a result of these transfer restrictions,
the Investor may not be able to readily offer, resell, transfer, pledge or otherwise dispose of the Shares and may be required
to bear the financial risk of an investment in the Shares for an indefinite period of time. The Investor acknowledges and agrees
that it has been advised to consult legal, tax and accounting prior to making any offer, resale, transfer, pledge or disposition
of any of the Shares.

 

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(d) The Investor acknowledges
and agrees that the Investor is purchasing the Shares from NextGen. The Investor further acknowledges that there have been no representations,
warranties, covenants and agreements made to the Investor by or on behalf of NextGen, the Company, any of their respective affiliates
or any control persons, officers, directors, employees, agents or representatives of any of the foregoing or any other person or
entity (including the Placement Agent), expressly or by implication, other than those representations, warranties, covenants and
agreements of NextGen expressly set forth in Section 5 of this Subscription Agreement and the investor presentation
and materials provided by NextGen to Investor, in making its investment or decision to invest in NextGen.

 

(e) The Investor acknowledges
and agrees that the Investor has received such information as the Investor deems necessary in order to make an investment decision
with respect to the Shares, including, with respect to NextGen, the Transaction and the business of the Company and its subsidiaries.
Without limiting the generality of the foregoing, the Investor acknowledges that he, she or it has reviewed NextGen’s filings
with the SEC. The Investor acknowledges and agrees that the Investor and the Investor’s professional advisor(s), if any,
have had the full opportunity to ask such questions, receive such answers and obtain such information as the Investor and such
Investor’s professional advisor(s), if any, have deemed necessary to make an investment decision with respect to the Shares.

 

(f) The Investor became
aware of this offering of the Shares solely by means of direct contact between the Investor and NextGen, the Company or a representative
of NextGen or the Company, and the Shares were offered to the Investor solely by direct contact between the Investor and NextGen,
the Company or a representative of NextGen or the Company. The Investor did not become aware of this offering of the Shares, nor
were the Shares offered to the Investor, by any other means. The Investor acknowledges that the Shares (i) were not offered
by any form of general solicitation or general advertising and (ii) are not being offered in a manner involving a public offering
under, or in a distribution in violation of, the Securities Act, or any state securities laws. The Investor acknowledges that it
is not relying upon, and has not relied upon, any statement, representation or warranty made by any person, firm or corporation
(including, without limitation, NextGen, the Company, the Placement Agent, any of their respective affiliates or any control persons,
officers, directors, employees, agents or representatives of any of the foregoing), other than the agreements, covenants, representations
and warranties of NextGen contained in Section 5 of this Subscription Agreement, in making its investment or decision
to invest in NextGen.

 

(g) The Investor acknowledges
that it is aware that there are substantial risks incident to the purchase and ownership of the Shares, including those set forth
in NextGen’s filings with the SEC. The Investor has such knowledge and experience in financial and business matters as to
be capable of evaluating the merits and risks of an investment in the Shares, and the Investor has sought such accounting, legal
and tax advice as the Investor has considered necessary to make an informed investment decision. The Investor acknowledges that
Investor shall be responsible for any of the Investor’s tax liabilities that may arise as a result of the transactions contemplated
by this Subscription Agreement, and that neither NextGen nor the Company has provided any tax advice or any other representation
or guarantee regarding the tax consequences of the transactions contemplated by the Subscription Agreement.

 

(h) Alone, or together
with any professional advisor(s), the Investor has adequately analyzed and fully considered the risks of an investment in the Shares
and determined that the Shares are a suitable investment for the Investor and that the Investor is able at this time and in the
foreseeable future to bear the economic risk of a total loss of the Investor’s investment in NextGen. The Investor acknowledges
specifically that a possibility of total loss exists.

 

(i) Reserved.

 

(j) The Investor acknowledges
and agrees that no federal or state agency has passed upon or endorsed the merits of the offering of the Shares or made any findings
or determination as to the fairness of this investment.

 

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(k) The Investor has
been duly formed or incorporated and is validly existing and is in good standing under the laws of its jurisdiction of formation
or incorporation, with power and authority to enter into, deliver and perform its obligations under this Subscription Agreement.

 

(l) The execution, delivery
and performance by the Investor of this Subscription Agreement are within the powers of the Investor, have been duly authorized
and will not constitute or result in a breach or default under or conflict with any order, ruling or regulation of any court or
other tribunal or of any governmental commission or agency, or any agreement or other undertaking, to which the Investor is a party
or by which the Investor is bound, and, the Investor will not violate any provisions of the Investor’s organizational documents,
including, without limitation, its incorporation or formation papers, bylaws, indenture of trust or partnership or operating agreement,
as may be applicable. The signature of the Investor on this Subscription Agreement is genuine, and the signatory has been duly
authorized to execute the same, and, assuming that this Subscription Agreement constitutes the valid and binding agreement of NextGen,
this Subscription Agreement constitutes a legal, valid and binding obligation of the Investor, enforceable against the Investor
in accordance with its terms except as may be limited or otherwise affected by (i) bankruptcy, insolvency, fraudulent conveyance,
reorganization, moratorium or other laws relating to or affecting the rights of creditors generally, and (ii) principles of
equity, whether considered at law or equity.

 

(m) Neither the Investor
nor any of its officers, directors, managers, managing members, general partners or any other person acting in a similar capacity
or carrying out a similar function, is (i) a person or entity named on the Specially Designated Nationals and Blocked Persons
List, the Foreign Sanctions Evaders List, the Sectoral Sanctions Identification List, or any other similar list of sanctioned persons
administered by the U.S. Treasury Department’s Office of Foreign Assets Control (“OFAC”),
or any similar list of sanctioned persons administered by the European Union or any individual European Union member state, including
the United Kingdom (collectively, “Sanctions
Lists”); (ii) directly or indirectly owned or controlled by, or acting on behalf of, one or more persons
on a Sanctions List; (iii) organized, incorporated, established, located, resident or born in, or a citizen, national, or
the government, including any political subdivision, agency, or instrumentality thereof, of, Cuba, Iran, North Korea, Syria, Venezuela,
the Crimea region of Ukraine, or any other country or territory embargoed or subject to substantial trade restrictions by the United
States, the European Union or any individual European Union member state, including the United Kingdom; (iv) a Designated
National as defined in the Cuban Assets Control Regulations, 31 C.F.R. Part 515; or (v) a non-U.S. shell bank or providing
banking services indirectly to a non-U.S. shell bank (collectively, a “Prohibited
Investor”). The Investor represents that if it is a financial institution subject to the Bank Secrecy Act (31
U.S.C. Section 5311 et seq.) (the “BSA”),
as amended by the USA PATRIOT Act of 2001 (the “PATRIOT
Act”), and its implementing regulations (collectively, the “BSA/PATRIOT
Act”), that the Investor maintains policies and procedures reasonably designed to comply with applicable obligations
under the BSA/PATRIOT Act. The Investor also represents that it maintains policies and procedures reasonably designed to ensure
compliance with sanctions administered by the United States, the European Union, or any individual European Union member state,
including the United Kingdom, to the extent applicable to it. The Investor further represents that the funds held by the Investor
and used to purchase the Shares were legally derived and were not obtained, directly or indirectly, from a Prohibited Investor.

 

(n) If the Investor is
or is acting on behalf of (i) an employee benefit plan that is subject to Title I of the Employee Retirement Income Security
Act of 1974, as amended (“ERISA”),
(ii) a plan, an individual retirement account or other arrangement that is subject to Section 4975 of the Internal Revenue
Code of 1986, as amended (the “Code”),
(iii) an entity whose underlying assets are considered to include “plan assets” of any such plan, account or arrangement
described in clauses (i) and (ii) (each, an “ERISA
Plan”), or (iv) an employee benefit plan that is a governmental plan (as defined in Section 3(32) of
ERISA), a church plan (as defined in Section 3(33) of ERISA), a non-U.S. plan (as described in Section 4(b)(4) of ERISA)
or other plan that is not subject to the foregoing clauses (i), (ii) or (iii) but may be subject to provisions under any other
federal, state, local, non-U.S. or other laws or regulations that are similar to such provisions of ERISA or the Code (collectively,
“Similar Laws,” and together
with ERISA Plans, “Plans”),
then the Investor represents and warrants that (A) neither NextGen nor any of its affiliates has provided investment advice
or has otherwise acted as the Plan’s fiduciary, with respect to its decision to acquire and hold the Shares, and none of
the parties to the Transaction is or shall at any time be the Plan’s fiduciary with respect to any decision in connection
with the Investor’s investment in the Shares; and (B) its purchase of the Shares will not result in a non-exempt prohibited
transaction under Section 406 of ERISA or Section 4975 of the Code, or any applicable Similar Law.

 

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(o) As of the date hereof,
the Investor does not have any “put equivalent position” as such term is defined in Rule 16a-1 under the Exchange Act
or short sale positions with respect to the securities of NextGen; provided that in the case of an Investor that is a multi-managed
investment vehicle whereby separate portfolio managers manage separate portions of such Investor’s assets, the representation
set forth above shall only apply with respect to the portion of assets managed by the portfolio manager that made the investment
decision to purchase the Shares covered by this Subscription Agreement.

 

(p) No disclosure or
offering document has been prepared by Goldman Sachs & Co. LLC (the “Placement
Agent”) or any of its affiliates in connection with the offer and sale of the Shares.

 

(q) None of the Placement
Agent, any of its affiliates, or any control persons, officers, directors, employees, agents or representatives of any of the foregoing
has made any independent investigation with respect to NextGen, the Company or its subsidiaries or any of their respective businesses,
or the Shares or the accuracy, completeness or adequacy of any information supplied to the Investor by NextGen.

 

(r) In connection with
the issue and purchase of the Shares, neither the Placement Agent, nor any of its affiliates, has acted as the Investor’s
financial advisor or fiduciary.

 

(s) The Investor, when
required to deliver payment to NextGen pursuant to Section 2 above, will have sufficient funds to pay the Subscription
Amount and consummate the purchase and sale of the Shares pursuant to this Subscription Agreement.

 

(t) No broker’s
or finder’s fees or commissions will be payable by the Investor with respect to the transactions contemplated hereby.

 

(u) The Investor hereby
agrees that, from the date of this Subscription Agreement until the Closing Date (or earlier termination of this Subscription Agreement),
neither the Investor nor any person or entity acting on behalf of the Investor or pursuant to any understanding with the Investor
will engage in any Short Sales with respect to securities of NextGen. For purposes of this Section 6(u), “Short Sales”
shall mean all “short sales” as defined in Rule 200 promulgated under Regulation SHO under the Exchange Act, and all
short positions effected through any direct or indirect stock pledges (other than pledges in the ordinary course of business as
part of prime brokerage arrangements), forward sale contracts, options, puts, calls, swaps and similar arrangements (including
on a total return basis), or sales or other short transactions through non-U.S. broker dealers or foreign regulated brokers. Notwithstanding
the foregoing, (a) nothing herein shall prohibit other entities under common management with the Investor that have no knowledge
of this Subscription Agreement or of the Investor’s Subscription (including the Investor’s controlled affiliates and/or
affiliates) from entering into any Short Sales and (b) in the case of an Investor that is a multi-managed investment vehicle whereby
separate portfolio managers manage separate portions of such the Investor’s assets and the portfolio managers have no knowledge
of the investment decisions made by the portfolio managers managing other portions of such the Investor’s assets, the limitations
set forth in the first sentence of this Section 6(u) shall only apply with respect to the portion of assets managed by the
portfolio manager that made the investment decision to purchase the Shares covered by this Subscription Agreement.

 

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7. Registration
Rights.

 

(a) NextGen agrees that,
within fifteen (15) business days following the Closing Date (such deadline, the “Filing Deadline”), NextGen
will submit to or file with the SEC (at NextGen’s expense) a registration statement for a shelf registration on Form S-1,
Form S-3 (if NextGen is then eligible to use a Form S-3 shelf registration) or other appropriate form (the “Registration
Statement”), in each case, covering the resale of the Shares acquired by the Investor pursuant to this Agreement
which are eligible for registration (determined as of two (2) business days prior to such submission or filing) (the “Registrable
Shares”) and NextGen shall use its commercially reasonable efforts to have the Registration Statement declared effective
as soon as practicable after the filing thereof, but no later than the earlier of (i) the 60th calendar day following the
filing date thereof if the SEC notifies NextGen that it will “review” the Registration Statement and (ii) the
5th business day after the date NextGen is notified (orally or in writing, whichever is earlier) by the SEC that the Registration
Statement will not be “reviewed” or will not be subject to further review (such earlier date, the “Effectiveness
Deadline”); provided, however, that NextGen’s obligations to include the Registrable Shares in the
Registration Statement are contingent upon Investor furnishing in writing to NextGen such information regarding Investor or its
permitted assigns, the securities of NextGen held by Investor and the intended method of disposition of the Registrable Shares
(which shall be limited to non-underwritten public offerings) as shall be reasonably requested by NextGen to effect the registration
of the Registrable Shares, and Investor shall execute such documents in connection with such registration as NextGen may reasonably
request that are customary of a selling stockholder in similar situations, including providing that NextGen shall be entitled to
postpone and suspend the effectiveness or use of the Registration Statement, if applicable, during any customary blackout or similar
period or as permitted hereunder; provided that Investor shall not in connection with the foregoing be required to execute
any lock-up or similar agreement or otherwise be subject to any contractual restriction on the ability to transfer the Registrable
Shares. NextGen will use its commercially reasonable efforts to provide a draft of the Registration Statement to Investor for review
at least two (2) business days in advance of the date of filing the Registration Statement with the SEC; provided that for
the avoidance of doubt, in no event shall NextGen be required to delay or postpone the filing of such Registration Statement as
a result of or in connection with Investor’s review. For as long as the Investor holds Shares, NextGen will use commercially
reasonable efforts to file all reports for so long as the condition in Rule 144(c)(1) (or Rule 144(i)(2), if applicable) is required
to be satisfied, and provide all customary and reasonable cooperation, necessary to enable the undersigned to resell the Shares
pursuant to Rule 144 of the Securities Act (in each case, when Rule 144 of the Securities Act becomes available to the Investor).
Any failure by NextGen to file the Registration Statement by the Filing Deadline or to effect such Registration Statement by the
Effectiveness Deadline shall not otherwise relieve NextGen of its obligations to file or effect the Registration Statement as set
forth above in this Section 7. Notwithstanding the foregoing, if the SEC prevents NextGen from including any or all
of the shares proposed to be registered under the Registration Statement due to limitations on the use of Rule 415 of the Securities
Act for the resale of the Shares by the applicable stockholders or otherwise, such Registration Statement shall register for resale
such number of Shares which is equal to the maximum number of Shares as is permitted by the SEC. In such event, the number of Shares
to be registered for each selling stockholder named in the Registration Statement shall be reduced pro rata among all such selling
stockholders and as promptly as practicable after being permitted to register additional Registrable Shares under Rule 415 under
the Securities Act, NextGen shall amend the Registration Statement or file a new Registration Statement to register such Registrable
Shares not included in the initial Registration Statement and cause such amendment or Registration Statement to become effective
as promptly as practicable. As soon as is reasonably practicable upon notification by the SEC that the Registration Statement has
been declared effective by the SEC, NextGen shall file the final prospectus under Rule 424 of the Securities Act. In no event shall
the Investor be identified as a statutory underwriter in the Registration Statement unless requested by the SEC; provided
that if the SEC requests that the Investor be identified as a statutory underwriter in the Registration Statement, the Investor
will have an opportunity to withdraw from the Registration Statement.

 

(b) At its expense NextGen
shall:

 

(i) except
for such times as NextGen is permitted hereunder to suspend the use of the prospectus forming part of a Registration Statement,
use its commercially reasonable efforts to keep such registration, and any qualification, exemption or compliance under state securities
laws which NextGen determines to obtain, continuously effective with respect to Investor, and to keep the applicable Registration
Statement or any subsequent shelf registration statement free of any material misstatements or omissions, until the earlier of
the following: (A) Investor ceases to hold any Registrable Shares, (B) the date all Registrable Shares held by Investor
may be sold without restriction under Rule 144 promulgated under the Securities Act (“Rule 144”), including,
without limitation, any volume and manner of sale restrictions which may be applicable to affiliates under Rule 144, and (C) three
(3) years from the date of effectiveness of the Registration Statement;

 

(ii) advise
Investor within five (5) business days:

 

(1) when
a Registration Statement or any amendment thereto has been filed with the SEC and when such Registration Statement or any post-effective
amendment thereto has become effective;

 

(2) after
it shall receive notice or obtain knowledge thereof, of the issuance by the SEC of any stop order suspending the effectiveness
of any Registration Statement or the initiation of any proceedings for such purpose;

 

    9

     

    

  

(3) of the
receipt by NextGen of any notification with respect to the suspension of the qualification of the Registrable Shares included therein
for sale in any jurisdiction or the initiation or threatening of any proceeding for such purpose; and

 

(4) subject
to the provisions in this Subscription Agreement, of the occurrence of any event that requires the making of any changes in any
Registration Statement or prospectus so that, as of such date, the statements therein are not misleading and do not omit to state
a material fact required to be stated therein or necessary to make the statements therein (in the case of a prospectus, in the
light of the circumstances under which they were made) not misleading.

 

Notwithstanding anything to the contrary
set forth herein, NextGen shall not, when so advising Investor of such events, provide Investor with any material, nonpublic information
regarding NextGen other than to the extent that providing notice to Investor of the occurrence of the events listed in (1) through
(4) above constitutes material, nonpublic information regarding NextGen;

 

(iii) use its
commercially reasonable efforts to obtain the withdrawal of any order suspending the effectiveness of any Registration Statement
as soon as reasonably practicable;

 

(iv) upon the
occurrence of any event contemplated in Section 7(b)(ii)(4) above, except for such times as NextGen is permitted hereunder
to suspend, and has suspended, the use of a prospectus forming part of a Registration Statement, NextGen shall use its commercially
reasonable efforts to as soon as reasonably practicable prepare a post-effective amendment to such Registration Statement or a
supplement to the related prospectus, or file any other required document so that, as thereafter delivered to purchasers of the
Registrable Shares included therein, such prospectus will not include any untrue statement of a material fact or omit to state
any material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading;

 

(v) use its
commercially reasonable efforts to cause all Registrable Shares to be listed on each securities exchange or market, if any, on
which the shares of Class A common stock issued by NextGen have been listed;

 

(vi) cause
NextGen’s transfer agent to remove the legend set forth above in Section 6(b)(i), at the Investor’s request,
as soon as reasonably practicable after the Shares are sold pursuant to Rule 144 or the Registration Statement; and

 

(vii) otherwise,
in good faith, cooperate reasonably with, and take such customary actions as may reasonably be requested by the Investor, consistent
with the terms of this Agreement, in connection with the registration of the Registrable Shares.

 

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(c) Notwithstanding anything
to the contrary in this Subscription Agreement, NextGen shall be entitled to delay the filing or effectiveness of, or suspend the
use of, the Registration Statement if it determines, upon the advice of external legal counsel, that in order for the Registration
Statement not to contain a material misstatement or omission, (i) an amendment thereto would be needed to include information that
would at that time not otherwise be required in a current, quarterly, or annual report under the Exchange Act, (ii) the negotiation
or consummation of a transaction by NextGen or its subsidiaries is pending or an event has occurred, which negotiation, consummation
or event NextGen’s board of directors reasonably believes would require additional disclosure by NextGen in the Registration
Statement of material information that NextGen has a bona fide business purpose for keeping confidential and the non-disclosure
of which in the Registration Statement would be expected, in the reasonable determination of NextGen’s board of directors
to cause the Registration Statement to fail to comply with applicable disclosure requirements, or (iii) in the good faith judgment
of the majority of NextGen’s board of directors, such filing or effectiveness or use of such Registration Statement, would
be seriously detrimental to NextGen and the majority of the NextGen board of directors concludes as a result that it is essential
to defer such filing (each such circumstance, a “Suspension
Event”); provided, however, that NextGen may not delay or suspend the Registration Statement on more than
two (2) occasions or for more than sixty (60) consecutive calendar days, or more than ninety (90) total calendar days in each
case during any twelve (12) month period. Upon receipt of any written notice from NextGen of the happening of any Suspension Event
during the period that the Registration Statement is effective or if as a result of a Suspension Event the Registration Statement
or related prospectus contains any untrue statement of a material fact or omits to state any material fact required to be stated
therein or necessary to make the statements therein (in light of the circumstances under which they were made, in the case of the
prospectus) not misleading, Investor agrees that (i) it will immediately discontinue offers and sales of the Registrable Shares
under the Registration Statement (excluding, for the avoidance of doubt, sales conducted pursuant to Rule 144) until Investor receives
copies of a supplemental or amended prospectus (which NextGen agrees to promptly prepare) that corrects the misstatement(s) or
omission(s) referred to above and receives notice that any post-effective amendment has become effective or unless otherwise notified
by NextGen that it may resume such offers and sales, and (ii) it will maintain the confidentiality of any information included
in such written notice delivered by NextGen unless otherwise required by law or subpoena. If so directed by NextGen, Investor will
deliver to NextGen or, in Investor’s sole discretion destroy, all copies of the prospectus covering the Registrable Shares
in Investor’s possession; provided, however, that this obligation to deliver or destroy all copies of the prospectus
covering the Registrable Shares shall not apply (A) to the extent Investor is required to retain a copy of such prospectus
(1) in order to comply with applicable legal, regulatory, self-regulatory or professional requirements or (2) in accordance
with a bona fide pre-existing document retention policy or (B) to copies stored electronically on archival servers as a result
of automatic data back-up.

 

(d) The Investor may
deliver written notice (an “Opt-Out Notice”) to NextGen requesting that the Investor not receive notices from
NextGen otherwise required by Section 7; provided, however, that the Investor may later revoke any such Opt-Out Notice
in writing. Following receipt of an Opt-Out Notice from the Investor (unless subsequently revoked), (i) NextGen shall not deliver
any such notices to the Investor and the Investor shall no longer be entitled to the rights associated with any such notice and
(ii) each time prior to the Investor’s intended use of an effective Registration Statement, the Investor will notify NextGen
in writing at least two (2) business days in advance of such intended use, and if a notice of a Suspension Event was previously
delivered (or would have been delivered but for the provisions of this Section 7(d)) and the related suspension period remains
in effect, NextGen will so notify the Investor, within one (1) business day of the Investor’s notification to NextGen, by
delivering to the Investor a copy of such previous notice of Suspension Event, and thereafter will provide the Investor with the
related notice of the conclusion of such Suspension Event immediately upon its availability.

 

(e) Indemnification.

 

(i)  NextGen
agrees to indemnify, to the extent permitted by law, Investor (to the extent a seller under the Registration Statement), its directors,
officers, partners, managers, members, investment advisors, employees, stockholders, agents and each person who controls Investor
(within the meaning of the Securities Act), to the extent permitted by law, against all losses, claims, damages, liabilities and
reasonable and documented out of pocket expenses (including, without limitation, reasonable and documented attorneys’ fees
of one law firm and one local counsel in each applicable jurisdiction) caused by any untrue or alleged untrue statement of material
fact contained in any Registration Statement, prospectus included 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 (in the case of a Prospectus, in the light of the circumstances
under which they were made) not misleading, except insofar as the same are caused by or contained in any information or affidavit
so furnished in writing to NextGen by or on behalf of such Investor expressly for use therein or such Investor has omitted a material
fact from such information or otherwise violated the Securities Act, Exchange Act or any state securities law or any other law,
rule or regulation thereunder; provided, however, that the indemnification contained in this Section 7(e)(i) shall
not apply to amounts paid in settlement of any losses, claims, damages, liabilities and out of pocket expenses if such settlement
is effected without the consent of NextGen (which consent shall not be unreasonably withheld, conditioned or delayed), nor shall
NextGen be liable for any losses, claims, damages, liabilities and out of pocket expenses to the extent they arise out of or are
based upon a violation which occurs (A) in reliance upon and in conformity with written information furnished by an Investor
expressly for use in the Prospectus, (B) in connection with any failure of such person to deliver or cause to be delivered
a prospectus made available by NextGen in a timely manner, (C) as a result of offers or sales effected by or on behalf of
any person by means of a “free writing prospectus” (as defined in Rule 405 under the Securities Act) that was
not authorized in writing by NextGen, or (D) in connection with any offers or sales effected by or on behalf of an Investor
in violation of Section 7(c) hereof.

 

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(ii) In connection
with any Registration Statement in which an Investor is participating, such Investor shall furnish (or cause to be furnished) to
NextGen in writing such information and affidavits as NextGen reasonably requests for use in connection with any such Registration
Statement or Prospectus and, to the extent permitted by law, shall indemnify NextGen, its directors, officers, agents, employees
and each person or entity who controls NextGen (within the meaning of the Securities Act) against any losses, claims, damages,
liabilities and reasonable and documented out of pocket expenses (including, without limitation, reasonable and documented attorneys’
fees of one law firm) resulting from any untrue or alleged untrue statement of material fact contained or incorporated by reference
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 (in the case of
a Prospectus, in the light of the circumstances under which they were made) not misleading, but only to the extent that such untrue
statement or omission is contained (or not contained in, in the case of an omission) in any information or affidavit so furnished
in writing by on behalf of such Investor expressly for use therein; provided, however, that the liability of such Investor
shall be several and not joint with any other investor and shall be in proportion to and limited to the net proceeds received by
such Investor from the sale of Registrable Shares giving rise to such indemnification obligation.

 

(iii) Any person
or entity entitled to indemnification herein shall (A) give prompt written notice to the indemnifying party of any claim with respect
to which it seeks indemnification (provided that the failure to give prompt notice shall not impair any person’s or
entity’s right to indemnification hereunder to the extent such failure has not prejudiced the indemnifying party) and (B)
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 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 which cannot be settled in all respects by the payment of money
(and such money is so paid by the indemnifying party pursuant to the terms of such settlement) or which settlement includes a statement
or admission of fault and culpability on the part of such indemnified party or which does not include as an unconditional term
thereof the giving by the claimant or plaintiff to such indemnified party of a release from all liability in respect to such claim
or litigation. 

 

(iv) The indemnification
provided for under this Subscription 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 or entity of such indemnified party and shall
survive the transfer of securities. 

 

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(v) If the
indemnification provided under this Section 7(e) 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; provided,
however, that the liability of the Investor shall be limited to the net proceeds received by such Investor from the sale of
Registrable Shares giving rise to such indemnification obligation. 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 not made by, in the
case of an omission), or relates to information supplied by (or not supplied by, in the case of an omission), 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. 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 Sections 7(d)(i),
(ii) and (iii) above, any legal or other fees, charges or expenses reasonably incurred by such party in connection with any investigation
or proceeding. 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 Section 7(d)(v) from any person or entity who was not guilty of such fraudulent
misrepresentation.

 

8. Termination.
This Subscription Agreement shall terminate and be void and of no further force and effect, and all rights and obligations of the
parties hereunder shall terminate without any further liability on the part of any party in respect thereof, upon the earliest
to occur of (a) such date and time as the Transaction Agreement is terminated in accordance with its terms, (b) upon
the mutual written agreement of each of the parties hereto to terminate this Subscription Agreement, (c) if the conditions
to Closing set forth in Section 3 of this Subscription Agreement are not satisfied, or are not capable of being satisfied,
on or prior to the Closing and, as a result thereof, the transactions contemplated by this Subscription Agreement will not be or
are not consummated at the Closing and (d) August 21, 2021; provided that nothing herein will relieve any party from liability
for any willful breach hereof prior to the time of termination, and each party will be entitled to any remedies at law or in equity
to recover reasonable and documented out-of-pocket losses, liabilities or damages arising from any such willful breach. NextGen
shall notify the Investor of the termination of the Transaction Agreement promptly after the termination of such agreement. Upon
the termination of this Subscription Agreement in accordance with this Section 8, any monies paid by the Investor to
NextGen in connection herewith shall be promptly (and in any event within one (1) business day after such termination) returned
to the Investor.

 

9. Trust Account
Waiver. The Investor acknowledges that NextGen is a blank check company with the powers and privileges to effect a merger,
asset acquisition, reorganization or similar business combination involving NextGen and one or more businesses or assets. The Investor
further acknowledges that, as described in NextGen’s prospectus relating to its initial public offering dated October 6,
2020 (the “IPO Prospectus”)
available at www.sec.gov, substantially all of NextGen’s assets consist of the cash proceeds of NextGen’s initial public
offering and private placement of its securities, and substantially all of those proceeds have been deposited in a trust account
(the “Trust Account”) for
the benefit of NextGen, its public shareholders and the underwriter of NextGen’s initial public offering. Except with respect
to interest earned on the funds held in the Trust Account that may be released to NextGen to pay its tax obligations, if any, the
cash in the Trust Account may be disbursed only for the purposes set forth in the IPO Prospectus. For and in consideration of NextGen
entering into this Subscription Agreement, the receipt and sufficiency of which are hereby acknowledged, the Investor hereby irrevocably
waives any and all right, title and interest, or any claim of any kind it has or may have in the future, in or to any monies held
in the Trust Account, and agrees not to seek recourse against the Trust Account as a result of, or arising out of, this Subscription
Agreement; provided that nothing in this Section 9 shall (x) serve to limit or prohibit the Investor’s right
to pursue a claim against NextGen for legal relief against assets held outside the Trust Account (so long as such claim would not
affect NextGen’s ability to fulfill its obligation to effectuate any redemption right with respect to any securities of NextGen),
for specific performance or other equitable relief, (y) serve to limit or prohibit any claims that the Investor may have in the
future against NextGen’s assets or funds that are not held in the Trust Account (including any funds that have been released
from the Trust Account and any assets that have been purchased or acquired with any such funds) (so long as such claim would not
affect NextGen’s ability to fulfill its obligation to effectuate any redemption right with respect to any securities of NextGen)
or (z) be deemed to limit the Investor’s right, title, interest or claim to the Trust Account by virtue of the Investor’s
record or beneficial ownership of Shares of NextGen acquired by any means other than pursuant to this Subscription Agreement.

 

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10. Miscellaneous.

 

(a) Neither this Subscription
Agreement nor any rights that may accrue to the Investor hereunder (other than the Shares acquired hereunder, if any) may be transferred
or assigned, other than (i) by prior written consent from NextGen or (ii) an assignment to one or more controlled affiliates, including
any fund or account managed by the same investment manager as the Investor or a controlled affiliate thereof, without prior written
consent of NextGen, subject to, if such transfer or assignment is prior to the Closing, such transferee or assignee, as applicable,
executing a joinder to this Subscription Agreement or a separate subscription agreement in substantially the same form as this
Subscription Agreement, including with respect to the Subscription Amount and other terms and conditions; provided that,
in the case of any such transfer or assignment, the initial party to this Subscription Agreement shall remain bound by its obligations
under this Subscription Agreement in the event that the transferee or assignee, as applicable, does not comply with its obligations
to consummate the purchase of Shares contemplated hereby. Neither this Subscription Agreement nor any rights that may accrue to
NextGen hereunder or any of NextGen’s obligations may be transferred or assigned other than pursuant to the Transaction.

 

(b) NextGen may request
from the Investor such additional information as NextGen may reasonably deem necessary to evaluate the eligibility of the Investor
to acquire the Shares and in connection with the inclusion of the Shares in the Registration Statement, and the Investor shall
promptly provide such information as may reasonably be requested, to the extent readily available and to the extent consistent
with its internal policies and procedures; provided that, the Investor shall not in connection with the foregoing be required
to execute any lock-up or similar agreement or otherwise be subject to any contractual restriction on the ability to transfer the
Shares and that NextGen agrees to keep any such information provided by Investor confidential. The Investor acknowledges that NextGen
may file a copy of this Subscription Agreement with the SEC as an exhibit to a current or periodic report or a registration statement
of NextGen to the extent required by law or regulation.

 

(c) The Investor acknowledges
that NextGen and the Placement Agent (as a third-party beneficiary with the right to enforce Section 4, Section 5,
Section 6, Section 10, and Section 11 hereof on their own behalf and not, for the avoidance of doubt, on behalf
of NextGen) will rely on the acknowledgments, understandings, agreements, covenants, representations and warranties of the Investor
contained in this Subscription Agreement. Prior to the Closing, the Investor agrees to promptly notify NextGen and the Placement
Agent if any of the acknowledgments, understandings, agreements, representations and warranties of the Investor set forth herein
are no longer accurate.

 

(d) NextGen acknowledges
that the Investor and the Placement Agent (as a third-party beneficiary with the right to enforce Section 4, Section
5, Section 6, Section 10, and Section 11 hereof on their own behalf and not, for the avoidance of doubt,
on behalf of the Investor) will rely on the acknowledgments, understandings, agreements, covenants, representations and warranties
of NextGen contained in this Subscription Agreement. Prior to the Closing, NextGen agrees to promptly notify the Investor and the
Placement Agent if any of the acknowledgments, understandings, agreements, representations and warranties of NextGen set forth
herein are no longer accurate.

 

(e) NextGen, the Placement
Agent and the Investor are each entitled to rely upon this Subscription Agreement and each is irrevocably authorized to produce
this Subscription Agreement or a copy hereof to any interested party in any administrative or legal proceeding or official inquiry
with respect to the matters covered hereby to the extent required by law or regulation.

 

(f) All of the representations
and warranties contained in this Subscription Agreement shall survive the Closing. All of the covenants and agreements made by
each party in this Subscription Agreement shall survive the Closing until the applicable statute of limitations or in accordance
with their respective terms, if a shorter period.

 

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(g) This Subscription
Agreement may not be modified, waived or terminated (other than pursuant to the terms of Section 8 above) except by
an instrument in writing, signed by each of the parties hereto. No failure or delay of either party in exercising any right or
remedy hereunder shall operate as a waiver thereof, nor shall any single or partial exercise of any such right or power, or any
abandonment or discontinuance of steps to enforce such right or power, or any course of conduct, preclude any other or further
exercise thereof or the exercise of any other right or power. The rights and remedies of the parties and third-party beneficiaries
hereunder are cumulative and are not exclusive of any rights or remedies that they would otherwise have hereunder.

 

(h) This Subscription
Agreement (including the schedule hereto) constitutes the entire agreement, and supersedes all other prior agreements, understandings,
representations and warranties, both written and oral, among the parties, with respect to the subject matter hereof. Except as
set forth in Sections 10(c) and 10(d) with respect to the persons referenced therein, this Subscription
Agreement shall not confer any rights or remedies upon any person other than the parties hereto, and their respective successor
and assigns.

 

(i) Except as otherwise
provided herein, this Subscription Agreement shall be binding upon, and inure to the benefit of the parties hereto and their heirs,
executors, administrators, successors, legal representatives, and permitted assigns, and the agreements, representations, warranties,
covenants and acknowledgments contained herein shall be deemed to be made by, and be binding upon, such heirs, executors, administrators,
successors, legal representatives and permitted assigns.

 

(j) If any provision
of this Subscription Agreement shall be adjudicated by a court of competent jurisdiction to be invalid, illegal or unenforceable,
the validity, legality or enforceability of the remaining provisions of this Subscription Agreement shall not in any way be affected
or impaired thereby and shall continue in full force and effect.

 

(k) Each party shall
pay all of its own expenses in connection with this Subscription Agreement and the transactions contemplated hereby.

 

(l) The obligations of
the Investor under this Subscription Agreement are several and not joint with the obligations of any other investor under the Other
Subscription Agreements, and the Investor shall not be responsible in any way for the performance of the obligations of any other
investor under any Other Subscription Agreement. The decision of the Investor to purchase the Shares pursuant to this Subscription
Agreement has been made by the Investor independently of any other investor and independently of any information, materials, statements
opinions as to the business, affairs, operations, assets, properties, liabilities, results of operations, condition (financial
or otherwise) or prospects of NextGen, the Company or any of their respective subsidiaries which may have been made or given by
any other investor or by any agent or employee of any other investor, and neither the Investor nor any of its agents or employees
shall have any liability to any other investor relating to or arising from any such information, materials, statements or opinions.
Nothing contained herein or in any Other Subscription Agreement, and no action taken by the Investor or any other investor pursuant
hereto or thereto, shall be deemed to constitute the Investor and any other investor as a partnership, an association, a joint
venture or any other kind of entity, or create a presumption that the Investor and any other investor are in any way acting in
concert or as a “group” (within the meaning of Section 13(d) of the Exchange Act) with respect to such obligations
or the transactions contemplated by this Subscription Agreement and the Other Subscription Agreements. The Investor acknowledges
that no other investor has acted as agent for the Investor in connection with making its investment hereunder and no other investor
will be acting as agent of the Investor in connection with monitoring its investment in the Shares or enforcing its rights under
this Subscription Agreement.

 

(m) This Subscription
Agreement may be executed in one or more counterparts (including by electronic mail or in .pdf) and by different parties in separate
counterparts, with the same effect as if all parties hereto had signed the same document. All counterparts so executed and delivered
shall be construed together and shall constitute one and the same agreement.

 

(n) The parties hereto
acknowledge and agree that irreparable damage would occur in the event that any of the provisions of this Subscription Agreement
were not performed in accordance with their specific terms or were otherwise breached. It is accordingly agreed that the parties
shall be entitled to an injunction or injunctions to prevent breaches of this Subscription Agreement, without posting a bond or
undertaking and without proof of damages, to enforce specifically the terms and provisions of this Subscription Agreement, this
being in addition to any other remedy to which such party is entitled at law, in equity, in contract, in tort or otherwise.

 

    15

     

    

  

(o) THE PARTIES HERETO
IRREVOCABLY SUBMIT TO THE EXCLUSIVE JURISDICTION OF THE COURT OF CHANCERY OF THE STATE OF DELAWARE (OR, TO THE EXTENT SUCH COURT
DOES NOT HAVE SUBJECT MATTER JURISDICTION, THE SUPERIOR COURT OF THE STATE OF DELAWARE, OR THE UNITED STATES DISTRICT COURT FOR
THE DISTRICT OF DELAWARE) SOLELY IN RESPECT OF THE INTERPRETATION AND ENFORCEMENT OF THE PROVISIONS OF THIS SUBSCRIPTION AGREEMENT
AND THE DOCUMENTS REFERRED TO IN THIS SUBSCRIPTION AGREEMENT AND IN RESPECT OF THE TRANSACTIONS CONTEMPLATED HEREBY, AND HEREBY
WAIVE, AND AGREE NOT TO ASSERT, AS A DEFENSE IN ANY ACTION, SUIT OR PROCEEDING FOR INTERPRETATION OR ENFORCEMENT HEREOF OR ANY
SUCH DOCUMENT THAT IS NOT SUBJECT THERETO OR THAT SUCH ACTION, SUIT OR PROCEEDING MAY NOT BE BROUGHT OR IS NOT MAINTAINABLE IN
SAID COURTS OR THAT VENUE THEREOF MAY NOT BE APPROPRIATE OR THAT THIS SUBSCRIPTION AGREEMENT OR ANY SUCH DOCUMENT MAY NOT BE ENFORCED
IN OR BY SUCH COURTS, AND THE PARTIES HERETO IRREVOCABLY AGREE THAT ALL CLAIMS WITH RESPECT TO SUCH ACTION, SUIT OR PROCEEDING
SHALL BE HEARD AND DETERMINED BY SUCH A DELAWARE STATE OR FEDERAL COURT. THE PARTIES HEREBY CONSENT TO AND GRANT ANY SUCH COURT
JURISDICTION OVER THE PERSON OF SUCH PARTIES AND OVER THE SUBJECT MATTER OF SUCH DISPUTE AND AGREE THAT MAILING OF PROCESS OR OTHER
PAPERS IN CONNECTION WITH SUCH ACTION, SUIT OR PROCEEDING IN THE MANNER PROVIDED IN THIS SECTION 10(o) OF THIS SUBSCRIPTION
AGREEMENT OR IN SUCH OTHER MANNER AS MAY BE PERMITTED BY LAW SHALL BE VALID AND SUFFICIENT SERVICE THEREOF. THIS SUBSCRIPTION AGREEMENT
SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF DELAWARE, WITHOUT REGARD TO THE PRINCIPLES OF
CONFLICTS OF LAWS THAT WOULD OTHERWISE REQUIRED THE APPLICATION OF THE LAW OF ANY OTHER STATE.

 

(p) EACH PARTY ACKNOWLEDGES
AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS SUBSCRIPTION AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY IS LIKELY
TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY RIGHT
SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS SUBSCRIPTION
AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THIS SUBSCRIPTION AGREEMENT. EACH PARTY CERTIFIES AND ACKNOWLEDGES THAT (I) NO
REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT,
IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER; (II) SUCH PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS
OF THE FOREGOING WAIVER; (III) SUCH PARTY MAKES THE FOREGOING WAIVER VOLUNTARILY; AND (IV) SUCH PARTY HAS BEEN INDUCED
TO ENTER INTO THIS SUBSCRIPTION AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVER AND CERTIFICATIONS IN THIS SECTION 10(p).

 

11. Non-Reliance
and Exculpation. The Investor acknowledges and agrees that: (i) it is not relying upon, and has not relied upon, any statement,
representation or warranty made by any person, firm or corporation (including, without limitation, the Placement Agent, any of
its affiliates or any control persons, officers, directors, employees, partners, agents or representatives of any of the foregoing),
other than the statements, covenants, representations and warranties of NextGen expressly contained in Section 5 of
this Subscription Agreement, in making its investment or decision to invest in NextGen; (ii) the Placement Agent is acting solely
as placement agent in connection with the Subscription and is not acting as an underwriter or in any other capacity and is not
and shall not be construed as a fiduciary for the Investor or any other person or entity in connection with the Subscription; (iii)
none of the Placement Agent, any of its affiliates or any control persons, officers, directors, employees, partners, agents or
representatives of any of the foregoing have made, or will make, any (a) representation or warranty, whether express or implied,
of any kind or character and have not provided, and will not provide, any advice or recommendation in connection with the Subscription
or (b) independent investigation with respect to NextGen, the Company or the Shares or the accuracy, completeness or adequacy of
any information supplied to the Investor by NextGen and (iv) the Placement Agent has not prepared a disclosure or offering document
in connection with the offer and sale of the Shares. The Investor acknowledges and agrees that none of (i) any other investor
pursuant to this Subscription Agreement or any other subscription agreement related to the private placement of the Shares (including
the investor’s respective affiliates or any control persons, officers, directors, employees, partners, agents or representatives
of any of the foregoing), (ii) the Placement Agent, its affiliates or any control persons, officers, directors, employees,
partners, agents or representatives of any of the foregoing, in each case, absent their own gross negligence, fraud or willful
misconduct, (iii) any other party to the Transaction Agreement (other than NextGen), or (iv) any affiliates, or any control
persons, officers, directors, employees, partners, agents or representatives of any of NextGen, the Company or any other party
to the Transaction Agreement shall be liable to the Investor, or to any other investor, pursuant to this Subscription Agreement
or any other subscription agreement related to the private placement of the Shares, the negotiation hereof or thereof or the subject
matter hereof or thereof, or the transactions contemplated hereby or thereby, for any action heretofore or hereafter taken or omitted
to be taken by any of them in connection with the purchase of the Shares. On behalf of itself and its affiliates, the Investor
releases the Placement Agent in respect of any losses, claims, damages, obligations, penalties, judgments, awards, liabilities,
costs, expenses or disbursements related to this Subscription Agreement or the transactions contemplated hereby, in each case,
absent their own gross negligence, fraud or willful misconduct.

 

    16

     

    

  

12. Press Releases;
Publicity. NextGen shall, by 5:30 p.m., New York City time, on or before the business day immediately following the date of
this Subscription Agreement, issue one or more press releases or furnish or file with the SEC a Current Report on Form 8-K (collectively,
the “Disclosure Document”) disclosing, to the extent not previously publicly disclosed, the PIPE Investment,
all material terms of the Transaction and any other material, non-public information that NextGen has provided to the Investor
at any time prior to the filing of the Disclosure Document. From and after the disclosure of the Disclosure Document, the Investor
shall not be in possession of any material, non-public information received from NextGen, the Company or any of their agents, officers,
directors or employees and the Investor shall no longer be subject to any confidentiality or similar obligations under any current
agreement, whether written or oral, with NextGen or any of its affiliates or agents relating to the transactions contemplated by
this Subscription Agreement. All press releases, marketing materials or other public communications or disclosures relating to
the transactions contemplated hereby between NextGen and the Investor, and the method of the release for publication thereof, shall
be subject to the prior written approval of (i) NextGen, and (ii) to the extent such press release or public communication or disclosure
of the name of the Investor or any of its affiliates or investment advisers, the Investor; provided that neither NextGen
nor the Investor shall be required to obtain consent pursuant to this Section 12 to the extent any proposed release
or statement is substantially equivalent to the information that has previously been made public without breach of the obligation
under this Section 12. The restriction in this Section 12 shall not apply to the extent the public announcement
or disclosure is required by applicable securities law (including in connection with the Registration Statement), any governmental
authority or stock exchange rule; provided that in such an event, the applicable party shall consult with the other party
in advance as to its form, content and timing.

 

13. Notices.
All notices and other communications among the parties shall be in writing and shall be deemed to have been duly given (i) when
delivered in person, (ii) when delivered after posting in the United States mail having been sent registered or certified mail
return receipt requested, postage prepaid, (iii) when delivered by FedEx or other nationally recognized overnight delivery service,
or (iv) when delivered by email (in each case in this clause (iv), solely if receipt is confirmed, but excluding any automated
reply, such as an out-of-office notification), addressed as follows:

 

If to the Investor, to the address provided
on the Investor’s signature page hereto.

 

If to NextGen, to:

 

NextGen Acquisition Corporation

2255 Glades Road, Suite 324A

Boca Raton, Florida 33431

	Attention:	Patrick Ford
	Email:	pford@nextgenacq.com

 

    17

     

    

  

with copies to (which shall
not constitute notice), to:

 

Skadden, Arps, Slate, Meagher
& Flom LLP

One Manhattan West

New York, New York 10001

	Attention:	Howard L. Ellin
	 	David J. Goldschmidt
	 	June S. Dipchand
	Email: 	howard.ellin@skadden.com
	 	david.goldschmidt@skadden.com
	 	june.dipchand@skadden.com

 

and

 

Xos, Inc.

3550 Tyburn St., Suite 100

Los Angeles, CA 90065

	Attention:	Kingsley Afemikhe
	 	Christen Romero
	Email:	[*]
	 	[*]

 

and

 

Cooley LLP

1333 2nd Street Suite 400

Santa Monica, CA 90401

	Attention:	Dave Young
	 	David Peinsipp
	 	Kristin VanderPas
	 	Garth Osterman
	 	 
	Email:	dyoung@cooley.com
	 	dpeinsipp@cooley.com
	 	kvanderpas@cooley.com
	 	gosterman@cooley.com

 

 

or to such
other address or addresses as the parties may from time to time designate in writing. Copies delivered solely to outside counsel
shall not constitute notice.

 

[SIGNATURE PAGES FOLLOW]

 

    18

     

    

 

IN WITNESS WHEREOF,
the Investor has executed or caused this Subscription Agreement to be executed by its duly authorized representative as of the
date set forth below.

 

	Name of Investor:	State/Country of Formation or Domicile:
	 	 
	By:  _________________	 
	Name:  _________________	 
	Title:  _________________	 
	 	 
	Name in which Shares are to be registered (if different):	Date: ________, 2021
	 	 
	Investor’s EIN:	 
	 	 
	Business Address-Street:	Mailing Address-Street (if different):
	 	 
	City, State, Zip:	City, State, Zip:
	 	 
	Attn:  _________________	Attn:  _________________
	 	 
	Telephone No.:	Telephone No.:
	Facsimile No.:	Facsimile No.:
	 	 
	Number of Shares subscribed for:	 
	 	 
	Aggregate Subscription Amount: $	Price Per Share: $10.00

 

You must pay the Subscription
Amount by wire transfer of United States dollars in immediately available funds to the account specified by NextGen in the Closing
Notice.

 

[Signature Page to Subscription Agreement]

  

     

     

    

 

IN WITNESS WHEREOF,
NextGen has accepted this Subscription Agreement as of the date set forth below.

 

	 	NEXTGEN ACQUISITION CORPORATION
	 	 	 
	 	By:	            
	 	 	Name:
	 	 	Title:

 

Date:                         ,
2021

 

[Signature Page to Subscription Agreement]

  

     

     

    

 

SCHEDULE A

 

ELIGIBILITY REPRESENTATIONS OF THE
INVESTOR

 

		A.	QUALIFIED INSTITUTIONAL BUYER STATUS

(Please check the applicable subparagraphs):

 

		☐	We are a “qualified institutional buyer” (as defined in Rule 144A under the Securities
Act).

 

		B.	INSTITUTIONAL ACCREDITED INVESTOR STATUS

(Please check the applicable subparagraphs):

 

		1.	☐ We are an institutional
“accredited investor” (within the meaning of Rule 501(a)(1), (2), (3) or (7) under the Securities Act) or an entity
in which all of the equity holders are accredited investors within the meaning of Rule 501(a) under the Securities Act, and
have marked and initialed the appropriate box on the following page indicating the provision under which we qualify as an “accredited
investor.”

 

		2.	☐ We are not a natural person.

 

Rule 501(a), in relevant part, states
that an institutional “accredited investor” shall mean any person who comes within any of the below listed categories,
or who the issuer reasonably believes comes within any of the below listed categories, at the time of the sale of the securities
to that person. The Investor has indicated, by marking and initialing the appropriate box below, the provision(s) below which apply
to the Investor and under which the Investor accordingly qualifies as an “accredited investor.”

 

		☐	Any bank, registered broker or dealer, insurance company, registered investment company, business
development company, or small business investment company;

 

		☐	Any plan established and maintained by a state, its political subdivisions, or any agency or instrumentality
of a state or its political subdivisions for the benefit of its employees, if such plan has total assets in excess of $5,000,000;

 

		☐	Any employee benefit plan, within the meaning of the Employee Retirement Income Security Act of
1974, if a bank, insurance company, or registered investment adviser makes the investment decisions, or if the plan has total assets
in excess of $5,000,000;

 

		☐	Any organization described in Section 501(c)(3) of the Internal Revenue Code, corporation,
similar business trust, or partnership, not formed for the specific purpose of acquiring the securities offered, with total assets
in excess of $5,000,000; or

 

		☐	Any trust with assets in excess of $5,000,000, not formed to acquire the securities offered, whose
purchase is directed by a sophisticated person.

 

This page should be completed by
the Investor

and constitutes a part of the Subscription Agreement.

 

[Schedule A to Subscription Agreement]Exhibit 10.2

 

FORM OF SPONSOR SUPPORT
AGREEMENT

 

This Sponsor Support
Agreement (this “Sponsor Agreement”) is dated as of February [__], 2021, by and among NextGen Sponsor LLC, a
Cayman Islands exempted company (the “Sponsor Holdco”), the Persons set forth on Schedule I hereto (together
with the Sponsor Holdco, each, a “Sponsor” and, together, the “Sponsors”), NextGen Acquisition
Corporation, a Cayman Islands exempted company limited by shares (which shall domesticate as a Delaware corporation prior to the
Closing (as defined in the Merger Agreement (as defined below))) (“Acquiror”), and Xos, Inc., a Delaware corporation
(the “Company”). Capitalized terms used but not defined herein shall have the respective meanings ascribed to
such terms in the Merger Agreement.

 

RECITALS

 

WHEREAS, as of the date
hereof, the Sponsors collectively are the holders of record and the “beneficial owners” (within the meaning of Rule
13d-3 under the Exchange Act) of 9,375,000 Acquiror Common Shares and 6,333,334 Acquiror Warrants in the aggregate as set forth
on Schedule I hereto;

 

WHEREAS, contemporaneously
with the execution and delivery of this Sponsor Agreement, Acquiror, Sky Merger Sub I, Inc. a Delaware corporation and a direct
wholly owned subsidiary of Acquiror (“Merger Sub”), and the Company, have entered into an Agreement and Plan
of Merger (as amended or modified from time to time, the “Merger Agreement”), dated as of the date hereof, pursuant
to which, among other transactions, Merger Sub will merge with and into the Company, with the Company continuing on as the surviving
corporation and a wholly owned subsidiary of Acquiror, on the terms and conditions set forth therein (the “Merger”);
and

 

WHEREAS, as an inducement
to Acquiror and the Company to enter into the Merger Agreement and to consummate the transactions contemplated therein, the parties
hereto desire to agree to certain matters as set forth herein.

 

AGREEMENT

 

NOW, THEREFORE, in consideration
of the foregoing and the mutual agreements contained herein, and intending to be legally bound hereby, the parties hereto hereby
agree as follows:

 

ARTICLE
I

SPONSOR SUPPORT AGREEMENT; COVENANTS

 

Section 1.1  Binding
Effect of Merger Agreement. Each Sponsor hereby acknowledges that it has read the Merger Agreement and this Sponsor
Agreement and has had the opportunity to consult with its tax and legal advisors. Each Sponsor shall be bound by and comply
with Sections 7.4 (No Solicitation by Acquiror) and 11.12 (Publicity) of the Merger Agreement (and any relevant
definitions contained in any such Sections) as if such Sponsor was an original signatory to the Merger Agreement with respect
to such provisions.

 

     

     

    

 

Section 1.2
No Transfer. During the period commencing on the date hereof and ending on the earliest of (a) the Effective Time,
(b) such date and time as the Merger Agreement shall be terminated in accordance with Section 10.1 thereof (the earlier of clauses
(a) and (b), the “Expiration Time”) and (c) the liquidation of Acquiror, each Sponsor shall not (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, file (or participate in the filing of) a registration statement with the SEC (other than the Proxy
Statement/Registration Statement) or establish or increase a put equivalent position or liquidate or decrease a call equivalent
position within the meaning of Section 16 of the Exchange Act, with respect to any Acquiror Common Shares or Acquiror Warrants
owned by such Sponsor, (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 Acquiror Common Shares or Acquiror Warrants owned by such Sponsor (clauses (i) and (ii)
collectively, a “Transfer”) or (iii) publicly announce any intention to effect any transaction specified in
clause (i) or (ii); provided, however, that the foregoing shall not prohibit Transfers between such Sponsor and any
Affiliate of such Sponsor, so long as, prior to and as a condition to the effectiveness of any such Transfer, such Affiliate executes
and delivers to Acquiror a joinder to this Sponsor Agreement in substantially the form attached hereto as Annex A; provided,
that any Transfer permitted under this Section 1.2 shall not relieve such Sponsor of its obligations under this Agreement.
Any Transfer in violation of this Section 1.2 shall be null and void.

 

Section 1.3
New Shares. In the event that after the date hereof but prior to the Expiration Time (a) any Acquiror Common Shares,
Acquiror Warrants or other equity securities of Acquiror are issued to a Sponsor pursuant to any stock dividend, stock split, recapitalization,
reclassification, combination or exchange of Acquiror Common Shares or Acquiror Warrants of, on or affecting the Acquiror Common
Shares or Acquiror Warrants owned by such Sponsor or otherwise, (b) a Sponsor purchases or otherwise acquires beneficial ownership
of any Acquiror Common Shares, Acquiror Warrants or other equity securities of Acquiror, or (c) a Sponsor acquires the right to
vote or share in the voting of any Acquiror Common Shares or other equity securities of Acquiror (such Acquiror Common Shares,
Acquiror Warrants or other equity securities of Acquiror, collectively, the “New Securities”), then such New
Securities acquired or purchased by such Sponsor shall be subject to the terms of this Sponsor Agreement to the same extent as
if they constituted the Acquiror Common Shares or Acquiror Warrants owned by such Sponsor as of the date hereof.

 

Section 1.4
Closing Date Deliverables. On the Closing Date, the Sponsor Holdco shall deliver to Acquiror and the Company a duly
executed copy of that certain Amended and Restated Registration Rights Agreement, by and among Acquiror, the Company, the Sponsor
Holdco and certain of the Company’s stockholders or their respective affiliates, as applicable, in substantially the form
attached as Exhibit C to the Merger Agreement.

 

    2

     

    

 

Section 1.5
Sponsor Agreements.

 

(a) At any
meeting of the shareholders of Acquiror, however called, or at any adjournment thereof, or in any other circumstance in which
the vote, consent or other approval of the shareholders of Acquiror is sought, each Sponsor shall (i) appear at each such
meeting or otherwise cause all of its Acquiror Common Shares to be counted as present thereat for purposes of calculating a
quorum and (ii) vote (or cause to be voted), or execute and deliver a written consent (or cause a written consent to be
executed and delivered) covering, all of its Acquiror Common Shares:

 

(i)
in favor of each Transaction Proposal;

 

(ii)
against any Business Combination Proposal or any proposal relating to a Business Combination Proposal (in each case, other
than the Transaction Proposals);

 

(iii)
against any merger agreement, merger, consolidation, combination, sale of substantial assets, reorganization, recapitalization,
dissolution, liquidation or winding up of or by Acquiror (other than the Merger Agreement and the transactions contemplated thereby);

 

(iv)
against any change in the business, management or Board of Directors of Acquiror that would reasonably be expected to adversely
affect the ability of Acquiror to consummate the transactions contemplated by the Merger Agreement, including the Merger;

 

(v)
against any proposal, action or agreement that would (A) impede, frustrate, prevent or nullify any provision of this Sponsor
Agreement, the Merger Agreement or the transactions contemplated thereby, including the Merger, (B) result in a breach in any respect
of any covenant, representation, warranty or any other obligation or agreement of Acquiror or the Merger Sub under the Merger Agreement,
(C) result in any of the conditions set forth in Article IX of the Merger Agreement not being fulfilled or (D) change in any manner
the dividend policy or capitalization of, including the voting rights of any class of capital stock of, Acquiror; and

 

(vi)
if applicable, in favor of waiving any and all anti-dilution rights such Sponsor may hold pursuant to the Acquiror Governing
Documents.

 

Each Sponsor hereby
agrees that it shall not commit or agree to take any action inconsistent with the foregoing.

 

(b)
Each Sponsor shall comply with, and fully perform all of its obligations, covenants and agreements set forth in, that certain
Letter Agreement, dated as of October 6, 2020, by and among the Sponsors, Acquiror and each of the other parties thereto (the “Voting
Letter Agreement”), including, without limitation, the obligations of the Sponsors pursuant to Section 1 therein to not
redeem any Acquiror Common Shares owned by such Sponsor in connection with the transactions contemplated by the Merger Agreement.

 

    3

     

    

 

(c)
 During the period commencing on the date hereof and ending on the earlier of the consummation of the Closing and the termination
of the Merger Agreement pursuant to Article X thereof, the Sponsors shall not modify or amend the Voting Letter Agreement.

 

Section 1.6
Further Assurances. Each Sponsor shall take, or cause to be taken, all such further actions and do, or cause to be
done, all things reasonably necessary (including under applicable Laws) to consummate the Merger and the other transactions contemplated
by the Merger Agreement and this Sponsor Agreement, in each case, on the terms and subject to the conditions set forth therein
and herein, as applicable.

 

Section 1.7
No Inconsistent Agreement. Each Sponsor hereby represents and covenants that such Sponsor has not entered into, and
shall not enter into, any agreement that would restrict, limit or interfere with the performance of such Sponsor’s obligations
hereunder.

 

ARTICLE
II

REPRESENTATIONS AND WARRANTIES

 

Section 2.1
Representations and Warranties of the Sponsors. Each Sponsor represents and warrants as of the date hereof to Acquiror
and the Company (severally and not jointly, and solely with respect to itself, himself or herself and not with respect to any other
Sponsor) as follows:

 

(a)
Organization; Due Authorization. If such Sponsor is not an individual, it is duly organized, validly existing and
in good standing under the Laws of the jurisdiction in which it is incorporated, formed, organized or constituted, and the execution,
delivery and performance of this Sponsor Agreement and the consummation of the transactions contemplated hereby are within such
Sponsor’s corporate, limited liability company or organizational powers and have been duly authorized by all necessary corporate,
limited liability company or organizational actions on the part of such Sponsor. If such Sponsor is an individual, such Sponsor
has full legal capacity, right and authority to execute and deliver this Sponsor Agreement and to perform his or her obligations
hereunder. This Sponsor Agreement has been duly executed and delivered by such Sponsor and, assuming due authorization, execution
and delivery by the other parties to this Sponsor Agreement, this Sponsor Agreement constitutes a legally valid and binding obligation
of such Sponsor, enforceable against such Sponsor in accordance with the terms hereof (except as enforceability may be limited
by bankruptcy Laws, other similar Laws affecting creditors’ rights and general principles of equity affecting the availability
of specific performance and other equitable remedies). If this Sponsor Agreement is being executed in a representative or fiduciary
capacity, the Person signing this Sponsor Agreement has full power and authority to enter into this Sponsor Agreement on behalf
of the applicable Sponsor.

 

    4

     

    

 

(b) Ownership.
Such Sponsor is the record and beneficial owner (as defined in the Securities Act) of, and has good title to, all of such
Sponsor’s Acquiror Common Shares and Acquiror Warrants, and there exist no Liens or any other limitation or restriction
(including any restriction on the right to vote, sell or otherwise dispose of such Acquiror Common Shares or Acquiror
Warrants (other than transfer restrictions under the Securities Act)) affecting any such Acquiror Common Shares or Acquiror
Warrants, other than Liens pursuant to (i) this Sponsor Agreement, (ii) the Acquiror’s Governing Documents, (iii) the
Merger Agreement, (iv) the Voting Letter Agreement or (v) any applicable securities Laws. Such Sponsor’s Acquiror
Common Shares and Acquiror Warrants are the only equity securities in Acquiror owned of record or beneficially by such
Sponsor on the date of this Sponsor Agreement, and none of such Sponsor’s Acquiror Common Shares or Acquiror Warrants
are subject to any proxy, voting trust or other agreement or arrangement with respect to the voting of such Acquiror Common
Shares or Acquiror Warrants, except as provided hereunder and under the Voting Letter Agreement. Other than the Acquiror
Warrants, such Sponsor does not hold or own any rights to acquire (directly or indirectly) any equity securities of Acquiror
or any equity securities convertible into, or which can be exchanged for, equity securities of Acquiror.

 

(c)
No Conflicts. The execution and delivery of this Sponsor Agreement by such Sponsor does not, and the performance
by such Sponsor of his, her or its obligations hereunder will not, (i) if such Sponsor is not an individual, conflict with or result
in a violation of the organizational documents of such Sponsor or (ii) require any consent or approval that has not been given
or other action that has not been taken by any Person (including under any Contract binding upon such Sponsor or such Sponsor’s
Acquiror Common Shares or Acquiror Warrants), in each case, to the extent such consent, approval or other action would prevent,
enjoin or materially delay the performance by such Sponsor of its, his or her obligations under this Sponsor Agreement.

 

(d)
Litigation. There are no Actions pending against such Sponsor, or to the knowledge of such Sponsor threatened against
such Sponsor, before (or, in the case of threatened Actions, that would be before) any arbitrator or any Governmental Authority,
which in any manner challenges or seeks to prevent, enjoin or materially delay the performance by such Sponsor of its, his or her
obligations under this Sponsor Agreement.

 

(e)
Brokerage Fees. Except as described on Section 5.13 of the Acquiror Disclosure Letter, no broker, finder, investment
banker or other Person is entitled to any brokerage fee, finders’ fee or other commission in connection with the transactions
contemplated by the Merger Agreement based upon arrangements made by such Sponsor, for which Acquiror or any of its Affiliates
may become liable.

 

(f) Affiliate Arrangements. Except as set forth on Schedule II hereto, neither such Sponsor nor anyone related
by blood, marriage or adoption to such Sponsor or, to the knowledge of such Sponsor, any Person in which such Sponsor has a direct
or indirect legal, contractual or beneficial ownership of 5% or greater, is party to, or has any rights with respect to or arising
from, any Contract with Acquiror or its Subsidiaries.

 

(g)
Acknowledgment. Such Sponsor understands and acknowledges that each of Acquiror and the Company is entering into
the Merger Agreement in reliance upon such Sponsor’s execution and delivery of this Sponsor Agreement.

 

    5

     

    

 

ARTICLE
III

MISCELLANEOUS

 

Section 3.1 Termination.
This Sponsor Agreement and all of its provisions shall terminate and be of no further force or effect upon the earliest of (a)
the Expiration Time, (b) the liquidation of Acquiror and (c) as to each Sponsor, the written agreement of Acquiror, the Company
and such Sponsor. Upon such termination of this Sponsor Agreement, all obligations of the parties under this Sponsor Agreement
will terminate, without any liability or other obligation on the part of any party hereto to any Person in respect hereof or the
transactions contemplated hereby, and no party hereto shall have any claim against another (and no person shall have any rights
against such party), whether under contract, tort or otherwise, with respect to the subject matter hereof; provided, however,
that the termination of this Sponsor Agreement shall not relieve any party hereto from liability arising in respect of any breach
of this Sponsor Agreement prior to such termination. This ARTICLE III shall survive the termination of this Sponsor Agreement.

 

Section 3.2
Governing Law. This Sponsor Agreement, and all claims or causes of action (whether in contract or tort) that may
be based upon, arise out of or relate to this Sponsor Agreement or the negotiation, execution or performance of this Sponsor Agreement
(including any claim or cause of action based upon, arising out of or related to any representation or warranty made in or in connection
with this Sponsor Agreement) will be governed by and construed in accordance with the internal Laws of the State of Delaware applicable
to agreements executed and performed entirely within such State, without giving effect to principals of or rules of conflict of
Laws to the extent such principles or rules would require or permit the applicable of Laws of another jurisdiction.

 

Section 3.3
CONSENT TO JURISDICTION AND SERVICE OF PROCESS; WAIVER OF JURY TRIAL.

 

(a) THE PARTIES
TO THIS SPONSOR AGREEMENT SUBMIT TO THE EXCLUSIVE JURISDICTION OF THE COURT OF CHANCERY OF THE STATE OF DELAWARE (OR, TO THE
EXTENT SUCH COURT DOES NOT HAVE SUBJECT MATTER JURISDICTION, THE SUPERIOR COURT OF THE STATE OF DELAWARE OR, IF IT HAS OR CAN
ACQUIRE JURISDICTION, THE UNITED STATES DISTRICT COURT FOR THE DISTRICT OF DELAWARE) IN RESPECT OF THE INTERPRETATION AND
ENFORCEMENT OF THE PROVISIONS OF THIS SPONSOR AGREEMENT AND ANY RELATED AGREEMENT, CERTIFICATE OR OTHER DOCUMENT DELIVERED IN
CONNECTION HEREWITH AND BY THIS SPONSOR AGREEMENT WAIVE, AND AGREE NOT TO ASSERT, ANY DEFENSE IN ANY ACTION FOR THE
INTERPRETATION OR ENFORCEMENT OF THIS SPONSOR AGREEMENT AND ANY RELATED AGREEMENT, CERTIFICATE OR OTHER DOCUMENT DELIVERED IN
CONNECTION HEREWITH, THAT THEY ARE NOT SUBJECT THERETO OR THAT SUCH ACTION MAY NOT BE BROUGHT OR IS NOT MAINTAINABLE IN SUCH
COURTS OR THAT THIS SPONSOR AGREEMENT MAY NOT BE ENFORCED IN OR BY SUCH COURTS OR THAT THEIR PROPERTY IS EXEMPT OR IMMUNE
FROM EXECUTION, THAT THE ACTION IS BROUGHT IN AN INCONVENIENT FORUM, OR THAT THE VENUE OF THE ACTION IS IMPROPER AND FURTHER
AGREES NOT TO BRING ANY PROCEEDING OR ACTION ARISING OUT OF OR RELATED TO THIS SPONSOR AGREEMENT OR THE TRANSACTIONS
CONTEMPLATED HEREBY IN ANY OTHER COURT. SERVICE OF PROCESS WITH RESPECT THERETO MAY BE MADE UPON ANY PARTY TO THIS SPONSOR
AGREEMENT BY MAILING A COPY THEREOF BY REGISTERED OR CERTIFIED MAIL, POSTAGE PREPAID, TO SUCH PARTY AT ITS ADDRESS AS
PROVIDED IN Section 3.8.

 

    6

     

    

 

(b)
WAIVER OF TRIAL BY JURY. EACH PARTY HERETO HEREBY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER
THIS SPONSOR AGREEMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY
AND UNCONDITIONALLY WAIVES ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY
ARISING OUT OF OR RELATING TO THIS SPONSOR AGREEMENT OR THE TRANSACTIONS CONTEMPLATED BY THIS SPONSOR AGREEMENT. EACH PARTY CERTIFIES
AND ACKNOWLEDGES THAT (I) NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT
SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER, (II) EACH SUCH PARTY UNDERSTANDS
AND HAS CONSIDERED THE IMPLICATIONS OF THIS WAIVER, (III) EACH SUCH PARTY MAKES THIS WAIVER VOLUNTARILY, AND (IV) EACH SUCH PARTY
HAS BEEN INDUCED TO ENTER INTO THIS SPONSOR AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS Section
3.3.

 

Section 3.4
Assignment. This Sponsor Agreement and all of the provisions hereof will be binding upon and inure to the benefit
of the parties hereto and their respective heirs, successors and permitted assigns. Neither this Sponsor Agreement nor any of the
rights, interests or obligations hereunder will be assigned (including by operation of law) without the prior written consent of
all of the other parties hereto.

 

Section 3.5
Specific Performance. The parties hereto agree that irreparable damage may occur in the event that any of the provisions
of this Sponsor Agreement were not performed in accordance with their specific terms or were otherwise breached. It is accordingly
agreed that the parties hereto shall be entitled to seek an injunction or injunctions to prevent breaches of this Sponsor Agreement
and to enforce specifically the terms and provisions of this Sponsor Agreement in the Court of Chancery of the State of Delaware
(or, to the extent such court does not have subject matter jurisdiction, the Superior Court of the State of Delaware or the United
States District Court for the District of Delaware), this being in addition to any other remedy to which such party is entitled
at law or in equity. In the event that any Action shall be brought in equity to enforce the provisions of this Sponsor Agreement,
no party shall allege, and each party hereby waives the defense, that there is an adequate remedy at law, and each party agrees
to waive any requirement for the securing or posting of any bond in connection therewith.

 

Section 3.6
Amendment; Waiver. This Sponsor Agreement or any provision hereof may not be amended, changed, supplemented, waived
or otherwise modified or terminated, except upon the execution and delivery of a written agreement executed by Acquiror, the Company
and the Sponsor Holdco.

 

Section 3.7 Severability.
If any provision of this Sponsor Agreement is held invalid or unenforceable by any court of competent jurisdiction, the other
provisions of this Sponsor Agreement will remain in full force and effect. Any provision of this Sponsor Agreement held
invalid or unenforceable only in part or degree will remain in full force and effect to the extent not held invalid or
unenforceable.

 

    7

     

    

 

Section 3.8
Notices. All notices and other communications among the parties hereto shall be in writing and shall be deemed to
have been duly given (a) when delivered in person, (b) when delivered after posting in the United States mail having been sent
registered or certified mail return receipt requested, postage prepaid, (c) when delivered by FedEx or other nationally recognized
overnight delivery service or (d) when e-mailed during normal business hours (and otherwise as of the immediately following Business
Day, addressed as follows:

 

If to Acquiror:

 

	NextGen Acquisition Corporation
	2255 Glades Road, Suite 324A
	Boca Raton, FL 33431
	Attention: 	Patrick Ford
	Email:	pford@nextgenacq.com

 

with a copy to (which shall not constitute notice):

 

	Skadden, Arps, Slate, Meagher & Flom LLP
	One Manhattan West
	New York, New York 10001
	Attention:	Howard L. Ellin
	 	June S. Dipchand
	Email:	howard.ellin@skadden.com
	 	june.dipchand@skadden.com

 

If to the Company:

 

	Xos, Inc.
	3550 Tyburn Street
	Los Angeles, CA 90065
	Attention:	Dakota Semler
	Email:	[*]

 

with a copy to (which shall not
constitute notice):

 

	Cooley LLP
	101 California Street, 5th Floor
	San Francisco, CA 94111
	Attention:	Garth Osterman
	 	Dave Peinsipp
	Email:	gosterman@cooley.com
	 	dpeinsipp@cooley.com 

 

    8

     

    

 

If to a Sponsor:

 

To such Sponsor’s address set forth in Schedule
I

 

with a copy to (which shall not constitute notice):

 

	Skadden, Arps, Slate, Meagher & Flom LLP
	One Manhattan West
	New York, New York 10001
	Attention:	Howard L. Ellin
	 	June S. Dipchand
	Email:	howard.ellin@skadden.com
	 	june.dipchand@skadden.com

 

Section 3.9
Sponsor Liability. The liability of any Sponsor hereunder is several (and not joint). Notwithstanding any other provision
of this Sponsor Agreement, in no event will any Sponsor be liable for any other Sponsor’s breach of such other Sponsor’s
representations, warranties, covenants, or agreements contained in this Sponsor Agreement.

 

Section 3.10   
Counterparts. This Sponsor Agreement may be executed in two or more counterparts (any of which may be delivered by
electronic transmission), each of which shall constitute an original, and all of which taken together shall constitute one and
the same instrument.

 

Section 3.11  
Entire Agreement. This Sponsor Agreement and the agreements referenced herein constitute the entire agreement and
understanding of the parties hereto in respect of the subject matter hereof and supersede all prior understandings, agreements
or representations by or among the parties hereto to the extent they relate in any way to the subject matter hereof.

 

[THE REMAINDER OF THIS PAGE
IS INTENTIONALLY BLANK]

 

    9

     

    

 

IN WITNESS WHEREOF,
the Sponsors, Acquiror, and the Company have each caused this Sponsor Agreement to be duly executed as of the date first written
above.

 

	 	SPONSORS:
	 	 	 	 
	 	NEXTGEN SPONSOR LLC
	 	 	 	 
	 	By:	 
	 	 	Name: 	 
	 	 	Title:	 
	 	 	 	 
	 	 	 
	 	 	Name:	 
	 	 	 	 
	 	 	 
	 	 	Name:	             

 

[Signature Page to Sponsor Support Agreement]

 

     

     

    

 

	 	ACQUIROR:
	 	 	 	 
	 	NEXTGEN ACQUISITION CORPORATION
	 	 	 	 
	 	By:	 
	 	 	Name: 	 
	 	 	Title:	                      

 

[Signature Page to Sponsor Support Agreement]

 

     

     

    

 

	 	COMPANY:
	 	 	 	 
	 	XOS, INC.
	 	 	 	 
	 	By:	 
	 	 	Name: 	     
	 	 	Title:	 

 

[Signature Page to Sponsor Support Agreement]

 

     

     

    

 

Annex A

 

Form of Joinder Agreement 

 

This Joinder Agreement (this “Joinder
Agreement”) is made as of the date written below by the undersigned (the “Joining Party”) in accordance
with the Sponsor Support Agreement, dated as of [___], 2021 (as amended, supplemented or otherwise modified from time to time,
the “Support Agreement”), by and among NextGen Sponsor LLC, a Cayman Islands exempted company (the “Sponsor
Holdco”), NextGen Acquisition Corporation, a Cayman Islands exempted company limited by shares (which shall migrate to
and domesticate as a Delaware corporation), Xos, Inc., a Delaware corporation, and the Sponsors set forth on Schedule I thereto.
Capitalized terms used herein and not otherwise defined shall have the meaning ascribed to them in the Support Agreement.

 

The Joining Party hereby acknowledges,
agrees and confirms that, by its execution of this Joinder Agreement, the Joining Party shall be deemed to be a party to, and a
“Sponsor” under, the Support Agreement as of the date hereof and shall have all of the rights and obligations of a
Sponsor as if it had executed the Support Agreement. The Joining Party hereby ratifies, as of the date hereof, and agrees to be
bound by, all of the terms, provisions and conditions contained in the Support Agreement.

 

IN WITNESS WHEREOF, the undersigned has
duly executed this Joinder Agreement as of the date written below.

 

	Date: [___], 2021	 	 	 
	 	 	 	 
	 	By:	 
	 	 	Name: 	 
	 	 	Title:	 
	 	 	 
	 	Address for Notices:
	 	 	 
	 	With copies to:

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