X0609 4 2026-07-10 0001819493 Xos, Inc. XOS 0001171780 RAPP EDWARD J 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 2670 0 A 134030 D Common Stock 2026-07-10 4 A false 60584 0 A 194614 D Common Stock 21172 I By Trust The shares reported in this transaction represent RSUs that were issued to the Reporting Person in lieu of the cash retainer for the Reporting Person's service as a non-employee director and as Audit Committee Chair in the second quarter of 2026. The RSUs reported vested immediately on the date of grant. Includes 60,584 unvested RSUs 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. Shares are held by the Edward Joseph Rapp TTEE U/A DTD 02/07/2005, of which the Reporting Person is trustee. /s/ David M. Zlotchew, Attorney-in-Fact for Edward J. Rapp 2026-07-14