X0609 4 2026-07-10 0001819493 Xos, Inc. XOS 0001551998 Smith John F. false C/O XOS, INC. 3550 TYBURN STREET, UNIT 100 LOS ANGELES CA 90065 true false false false false Common Stock 2026-07-10 4 A false 60584 0 A 113562 D The shares reported in this transaction represent Restricted Stock Units ("RSUs"), each of which represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs vest on the earlier of (i) the first anniversary of the Grant date and (ii) the day before the Company's 2027 Annual Meeting, subject to the Reporting Person's continuous service with Xos, Inc. through the vesting date. Includes 60,584 unvested RSUs. /s/ David M. Zlotchew, Attorney-in-Fact for John F. Smith 2026-07-14