X0609 4 2026-08-20 0001819493 Xos, Inc. XOS 0001179705 OSTERMANN DIETMAR false C/O XOS, INC. 3550 TYBURN STREET, UNIT 100 LOS ANGELES CA 90065 true false false false false Common Stock 2026-08-20 4 S false 10000 3.4913 D 105226 D Represents weighted average sales price. The shares were sold at prices ranging from $3.49 to $3.50. The Reporting Person will provide upon request, to the SEC, the Issuer or any security holder of the Issuer, full information regarding the number of shares sold at each separate price. Includes 60,584 unvested RSUs. /s/ David M. Zlotchew, Attorney-in-Fact for Dietmar Ostermann 2026-08-24