X0306 4 2021-08-20 0 0001819493 Xos, Inc. XOS 0001878397 Ferber Robert C/O XOS, INC. 3550 TYBURN STREET, UNIT 100 LOS ANGELES CA 90065 0 1 0 0 Chief Technology Officer Common Stock 2021-08-20 4 A 0 427971 0.00 A 427971 D Stock Option (Right to Buy) 0.015 2021-08-20 4 A 0 550248 A 2029-06-06 Common Stock 550248 550248 D Received pursuant to the Agreement and Plan of Merger, dated as of February 21, 2021, as amended on May 14, 2021, by and among NextGen Acquisition Corporation ("Acquiror"), Sky Merger Sub I, Inc., a Delaware corporation and wholly owned subsidiary of Acquiror ("Merger Sub") and Xos, Inc. ("Xos"), pursuant to which Merger Sub was merged with and into Xos, whereupon the separate existence of Merger Sub ceased and Xos became the surviving company and continued in existence as a subsidiary of Acquiror, which subsequently changed its name to Xos, Inc. (the "Issuer"). 25% of the stock option vested and became exercisable on April 10, 2020, and thereafter vest as to 1/48th of the shares in equal monthly installments, until such time as the option is 100% vested, subject to the continuing employment of the Reporting Person on each vesting date. Received in exchange for a Stock Option to purchase 500,000 shares of Xos Common Stock, of which 218,750 have been exercised. Robert Ferber, by /s/ Kim Merritt, Attorney-in-Fact 2021-08-24