Xos, Inc.

NextGen Acquisition Corporation (the “Company”) is filing this Notification of Late Filing on Form 12b-25 with respect to its Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2021 (the “Form 10-Q”). The Company has determined that it is unable to file its Form 10-Q within the prescribed time period because the Company’s independent registered public accounting firm is in the process of completing the review of the financial statements for the quarter ended June 30, 2021 and will need additional time to complete its review of such financial statements. The Company’s Form 10-Q will be filed on or before the fifth calendar day following the prescribed due date. This report may include “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, including relating to the filing of the 10-Q, other than statements of historical fact included in this report are forward-looking statements. When used in this report, words such as “anticipate,” “believe,” “estimate,” “expect,” “intend” and similar expressions, as they relate to the Company or its management team, identify forward-looking statements. Such forward-looking statements are based on the beliefs of management, as well as assumptions made by, and information currently available to, the Company’s management. Actual results could differ materially from those contemplated by the forward-looking statements as a result of certain factors detailed in the Company’s filings with the SEC. All subsequent written or oral forward-looking statements attributable to the Company or persons acting on its behalf are qualified in their entirety by this paragraph

NextGen Acquisition Corporation (the “Company”) has determined that it is unable, without unreasonable effort or expense, to file its Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2021 (the “Form 10-Q”) by the prescribed due date for the reasons described below. On April 12, 2021, the Acting Director of the Division of Corporation Finance and Acting Chief Accountant of the U.S. Securities and Exchange Commission (the “SEC”) together issued a statement regarding the accounting and reporting considerations for warrants issued by special purpose acquisition companies entitled “Staff Statement on Accounting and Reporting Considerations for Warrants Issued by Special Purpose Acquisition Companies (‘SPACs’)” (the “SEC Staff Statement”). On May 12, 2021, in further consideration of the guidance in the SEC Staff Statement and Accounting Standards Codification (“ASC”) 815-40, Derivatives and Hedging: Contracts in an Entities Own Equity , the Company concluded that a provision in the warrant agreement governing (i) its 12,500,000 redeemable warrants (the “Public Warrants”) that were included in the units issued by the Company in its initial public offering (the “IPO”) and (ii) the 6,333,334 redeemable warrants (together with the Public Warrants, the “Warrants”) that were issued via private placement, related to certain tender or exchange offers precludes the Warrants from being accounted for as components of equity. As the Warrants meet the definition of a derivative as contemplated in ASC 815, the Warrants are now recorded as derivative liabilities on the balance sheet and measured at fair value at inception (on the closing date of the IPO) and at each reporting date in accordance with ASC 820, “Fair Value Measurement,” with changes in fair value recognized in the statement of operations in the period of change