X0609 4/A 2026-07-15 2026-07-17 0001819493 Xos, Inc. XOS 0001971868 Richardson Michael Paul false C/O XOS, INC. 3550 TYBURN STREET, UNIT 100 LOS ANGELES CA 90065 true false false false true Common Stock 2026-07-15 4 S false 3119 2.3067 D 135372 D Common Stock 2026-07-16 4 S false 3119 2.1674 D 132253 D Common Stock 2026-07-17 4 S false 3118 2.1487 D 129135 D The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 16, 2025. Represents weighted average sales price. The shares were sold at prices ranging from $2.23 to $2.40. 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. Represents weighted average sales price. The shares were sold at prices ranging from $2.12 to $2.32. 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. Represents weighted average sales price. The shares were sold at prices ranging from $2.11 to $2.18. 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. This Amendment is filed solely to correct the Transaction Codes for the transactions on July 15, 2026, July 16, 2026 and July 17, 2026. Due to an administrative error, the transactions were incorrectly reported using Code 'D'. The shares were actually sold on the open market pursuant to a Rule 10b5-1 trading plan as indicated in footnote 3, and should have been designated as Code 'S'. There are no changes to the other information reported in the original Form 4. /s/ David M. Zlotchew, Attorney-in-Fact for Michael Paul Richardson 2026-08-26