X0306 4 2022-03-09 0 0001819493 Xos, Inc. XOS 0001877932 Afemikhe Kingsley C/O XOS, INC. 3550 TYBURN STREET, UNIT 100 LOS ANGELES CA 90065 0 1 0 0 Chief Financial Officer Common Stock 2022-03-09 4 A 0 21893 0.00 A 280508 D Common Stock 2022-03-09 4 F 0 8972 2.64 D 271536 D Common Stock 2022-07-11 4 A 0 340136 0.00 A 611672 D Represents the grant of Restricted Stock Units (RSUs). Each RSU represents a contingent right to receive one share of Common Stock upon settlement. The RSUs are fully vested as of the grant date. Represents the number of shares withheld by the Issuer to satisfy the tax withholding obligations in connection with the vesting of the RSU. Represents the grant of RSUs. Each RSU represents a contingent right to receive one share of Common Stock upon settlement. The RSUs vest as to 25% on April 10, 2023 and the remaining RSUs vest ratably on each of the next twelve (12) Quarterly Vesting Dates thereafter. "Quarterly Vesting Dates" mean each of March 10, June 10, September 10, and December 10, provided, however, that to the extent any such date occurs on a weekend day or U.S. federal holiday, the Quarterly Vesting Date will be deemed to occur on the immediately following day that is not a weekend day or U.S. federal holiday, subject to such Reporting Person's continuous service with the Issuer through such vesting date. /s/ Christen Romero, Attorney-in-Fact for Kingsley Afemikhe 2022-07-13