X0609 4 2026-04-10 0 0001819493 Xos, Inc. XOS 0001171780 RAPP EDWARD J false C/O XOS, INC. 3550 TYBURN STREET, UNIT 100 LOS ANGELES CA 90065 1 0 0 0 0 Common Stock 2026-04-10 4 A 0 5182 0 A 131360 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 Audit Committee Chair and a Director in the first quarter of 2026. The RSUs reported vested immediately on the date of grant. Includes 62,377 unvested RSUs. 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 2026-04-14