X0306 4 2022-08-09 0 0001819493 Xos, Inc. XOS 0001878366 Aljomaih Automotive Co. C/O XOS, INC. 3550 TYBURN STREET, UNIT 100 LOS ANGELES CA 90065 0 0 1 0 Convertible Promissory Note 2.3817 2022-08-09 4 P 0 20000000.00 20000000.00 A 2025-08-11 Common Stock 8397363 20000000.00 D On August 9, 2022, the Reporting Person entered into an agreement to purchase from the Issuer a Convertible Promissory Note with an aggregate principal amount of $20,000,000. The Convertible Promissory Note is initially convertible into shares common stock at a conversion price of $2.3817 per share, subject to adjustment. Therefore, the Convertible Promissory Note is initially convertible into 8,397,363 shares. The principal amount, plus any accrued and unpaid interest, is convertible into shares of common stock at any time on or after November 9, 2022. The Issuer may not effect any conversion of the Convertible Promissory Note, and a holder of the Convertible Promissory Note does not have the right to convert any portion of the Convertible Promissory Note, to the extent that, after giving effect to the attempted conversion, such holder would beneficially own a number of shares in excess of 19.99% of the shares of Issuer Common Stock outstanding immediately after giving effect to such conversion. /s/ Christen Romero, Attorney-in-Fact for Aljomaih Automotive Co. 2022-08-11