X0306 4 2021-08-20 0 0001819493 Xos, Inc. XOS 0001877933 Semler Dakota C/O XOS, INC. 3550 TYBURN STREET, UNIT 100 LOS ANGELES CA 90065 1 1 1 0 Chief Executive Officer Common Stock 2021-08-20 4 A 0 3884155 0.00 A 3884155 D Common Stock 2021-08-20 4 S 0 1000000 10.00 D 2884155 D Common Stock 2021-08-20 4 A 0 53745903 0.00 A 53745903 I See Footnote Common Stock 2021-08-20 4 A 0 502120 0.00 A 502120 I See Footnote 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"). Sold in connection with the subscription agreements with certain investors (the "PIPE investors") pursuant to which such investors agreed to purchase, substantially concurrently with the closing of the merger, an aggregate of $216,000,000 of the Issuer's shares of common stock, including $10,000,000 of common stock held by the Reporting Person, at a price of $10.00 per share, or an aggregate of 21,600,000 shares of common stock, including 1,000,000 shares of common stock held by the Reporting Person. Shares held by Emerald Green Trust. Mr. Semler may be deemed to beneficially own securities held by Emerald Green Trust by virtue of his shared control over such entities. Shares held by GenFleet LLC. Mr. Semler may be deemed to beneficially own securities held by GenFleet, LLC by virtue of his shared control over such entities. Dakota Semler, by /s/ Kim Merritt, Attorney-in-Fact 2021-08-24