X0609 4/A 2026-09-10 2026-09-14 0001819493 Xos, Inc. XOS 0001877933 Semler Dakota false C/O XOS, INC. 3550 TYBURN STREET, UNIT 100 LOS ANGELES CA 90065 true true false false Chief Executive Officer false Common Stock 2026-09-10 4 F false 14538 2.79 D 788909 D Common Stock 2026-09-10 4 A false 1388293 0 A 2177202 D Represents the number of shares withheld by the Issuer to satisfy the tax withholding obligations in connection with the vesting of the Reporting Person's previously reported Restricted Stock Unit ("RSU") Awards. Each RSU represents a contingent right to receive one share of common stock upon settlement. Includes 1,777,906 unvested RSUs. Approximately 33% of the Restricted Stock Unit ("RSU") Award shall vest on March 10, 2027 (the "Initial Vesting Date"), and the remainder of the RSU Award shall vest in twenty-four (24) approximately equal installments on each Monthly Vesting Date immediately following the Initial Vesting Date. "Monthly Vesting Date" means the 10th day of each month. Notwithstanding the foregoing, vesting shall terminate upon the Reporting Person's termination of continuous service, as described in Section 6(l) of the Global RSU Award Agreement. The Reporting Person is an executive officer and a director of the Issuer and is filing this Form 4 solely in such capacities. The number of shares reported in Column 5 includes certain securities in which the Reporting Person may be deemed to have a pecuniary interest, such as shares issuable upon settlement of RSUs that vest more than 60 days in the future. However, the Reporting Person does not beneficially own such securities within the meaning of Rule 13d-3 of the Securities Exchange Act of 1934, and the filing of this Form 4 shall not be deemed an admission that the Reporting Person is a '10% Owner' or a beneficial owner of such shares for purposes of Section 16 or for any other purpose, except to the extent of his pecuniary interest therein. This Amendment is being filed solely to correct an error in the number of unvested RSUs reported in footnote 2 of the original Form 4. The total unvested RSUs is the sum of the 389,613 RSUs initially reported in footnote 2 and the 1,388,293 RSUs awarded to the Reporting Person on September 10, 2026 and described in footnote 3. There are no changes to the reported numbers of securities acquired, disposed of, or beneficially owned following each transaction. /s/ David M. Zlotchew, Attorney-in-Fact for Dakota Semler 2026-10-13