Exhibit 99.1

Xos Extends Gross Profit Streak, Highlighting Operational Efficiency

Expanded first-half GAAP gross margin to 31.0% from 11.8% and non-GAAP gross margin to 29.0% from 4.9% in the prior year

Reduced first-half operating expenses by 8.6%, narrowing GAAP and non-GAAP operating losses by 22.8% and 40.9%, respectively

Improved first-half EBITDA by 24.8% and adjusted EBITDA by 38.6% year-over-year

LOS ANGELES, CA -- August 13, 2026 -- Xos, Inc. (NASDAQ: XOS) ("Xos" or the "Company"), a leading energy storage and fleet electrification solutions provider, today reported financial results for the second quarter ended June 30, 2026. Building on a year of disciplined execution and consistent operational improvement, Xos recorded its second consecutive quarter of positive gross margin and reduced its operating expenses, showcasing the durability of its operating model and its commitment to operational efficiency.

Second Quarter Highlights:

Six Months Ended June 30, 2026 Highlights:

Platform and Product Milestones:

“The first half of 2026 reinforced the durability of our multi-product model — and ex market we serve. With the Power Hub, Xos stepped directly into the race to power data centers and the AI economy. Second-quarter deliveries shifted into later quarters — deferrals, not cancellations — yet we posted our strongest first-half gross margin ever. We are revising our full-year outlook accordingly, but our priorities are unchanged: convert our pipeline into deliveries, scale the Power Hub, and build electrification solutions that win on reliability and economics,” said Dakota Semler, Chief Executive Officer of Xos.

“The first half of 2026 demonstrates the impact of the financial discipline we have embedded across Xos,” said Liana Pogosyan, Chief Financial Officer of Xos. “Year-over-year, we expanded GAAP gross margin to

31.0% from 11.8%, reduced operating expenses by 8.6%, narrowed operating loss by 22.8%, and improved adjusted EBITDA by 38.6%. During the second quarter, we also raised $7.6 million, net of offering costs, and took further action to optimize our cost structure through the early termination of our Huntington Beach facility lease. We ended the second quarter with $13.2 million in cash and remain focused on disciplined capital allocation as we execute against our revised outlook and pursue growth across our vehicle, powertrain, and energy-storage platforms.”

Second Quarter 2026 Financial Highlights

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(1) For further information about how we calculate Non-GAAP financial measures, such as Non-GAAP gross profit, Non-GAAP operating loss, Adjusted EBITDA, and free cash flow, see below for the reconciliations of GAAP to non-GAAP financial measures provided in the tables included in this release.

2026 Outlook:

Xos is revising its outlook for 2026 due to results to date and changes in the expected product mix and volume expectations for the second half of the year as follows:

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(1) This press release does not provide a forward-looking reconciliation from Non-GAAP operating loss to net loss, the most directly comparable GAAP measure, due to the uncertainty and the potential variability of inputs of the financial information. For the same reason, we are unable to address the probable significance of the unavailable information.

(2) Unit deliveries forecast includes our powertrain and Xos Hub products, stepvan and stripped chassis.

The outlook provided above is based on management beliefs and expectations as of the date of this press release. The results are based on assumptions that are believed to be reasonable as of this date, but may be materially affected by many factors, as discussed below in our “Cautionary Statement Regarding Forward-Looking Statements” disclaimer. Actual results may vary from the outlook above and the variations may be material. The Company undertakes no intent or obligation to publicly update or revise any of these projections, whether as a result of new information, future events or otherwise, except as required by law.

Conference Call and Webcast Details

To access the call, please dial in approximately ten minutes before the start of the call.

For those unable to participate in the live call, an audio replay will be available following the call through midnight Thursday, August 27, 2026. To access the replay, please call 1-844-512-2921 or 1-412-317-6671 (International) and enter access code 10210727. A replay of the webcast will also be archived shortly after the call and can be accessed on the Company's website.

About Xos, Inc.

Xos is a leading energy storage and fleet electrification solutions provider. The Xos Hub is a proactive, movable power source delivering high-capacity output and high-speed charging in one. Xos vehicles and fleet management software are purpose-built for medium- and heavy-duty commercial vehicles that travel on last-mile, back-to-base routes. The Company leverages its proprietary technologies to provide a

diverse customer base with rapid-deployment energy storage and charging solutions and commercial fleets with battery-electric vehicles that are easier to maintain and more cost-efficient on a total cost of ownership (TCO) basis than their internal combustion engine counterparts. For more information, please visit www.xostrucks.com.

Non-GAAP Financial Measures

The financial information in this press release has been presented in accordance with United States generally accepted accounting principles (“GAAP”) as well as on a non-GAAP basis to supplement Xos's unaudited condensed consolidated interim financial results. Xos's non-GAAP financial measures include operating cash flow less CapEx (Free Cash Flow), non-GAAP operating loss, non-GAAP gross profit and Adjusted EBITDA, which are defined below.

“Operating cash flow less CapEx (Free Cash Flow)” is defined as net cash provided by (used in) operating activities minus purchases of property and equipment.

“Non-GAAP operating loss” is defined as loss from operations adjusted for stock-based compensation, inventory write-downs and physical inventory and other adjustments.

“Non-GAAP gross profit” is defined as gross profit (loss) minus inventory write-downs and physical inventory and other adjustments.

“Adjusted EBITDA” is defined as EBITDA (earnings before interest, taxes, depreciation & amortization) minus change in fair value of derivatives, change in fair value of earn-out shares liability, gain on operating lease terminations, and stock based compensation.

Xos believes that the use of operating cash flow less CapEx (Free Cash Flow), non-GAAP operating loss, non-GAAP gross profit, and Adjusted EBITDA reflects additional means for management and investors to use when evaluating Xos's ongoing operating results and trends. The presentation of these measures should not be construed as an inference that Xos's future results will be unaffected by unusual or non-recurring items. It is important to note Xos's computation of operating cash flow less CapEx (Free Cash Flow), non-GAAP operating loss, non-GAAP gross profit, and Adjusted EBITDA may not be comparable to other similarly titled measures computed by other companies, because not all companies may calculate operating cash flow less CapEx (Free Cash Flow), non-GAAP operating loss, non-GAAP gross profit, and Adjusted EBITDA in the same fashion. Non-GAAP information is not prepared under a comprehensive set of accounting rules and therefore, should only be read in conjunction with financial information reported under GAAP when understanding Xos's operating performance. A reconciliation between historical GAAP and non-GAAP financial information is provided in this press release.

Cautionary Statement Regarding Forward-Looking Statements

This press release includes “forward-looking statements” within the meaning of the “safe harbor” provisions of the United States Private Securities Litigation Reform Act of 1995. These forward-looking statements include, but are not limited to, statements regarding projected financial and performance information; expectations and timing related to product deliveries and customer demand; sufficiency of existing cash reserves; customer acquisition and order metrics; ability to access additional capital and

Xos’s long-term strategy and future growth. These forward-looking statements may be identified by the words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “future,” “intend,” “likely,” “may,” “might,” “opportunity,” “plan,” “possible,” “project,” “potential,” “predict,” “seek,” “seem,” “should,” “strategy,” “target,” “will,” “would,” and similar expressions and any other statements that predict or indicate future events or trends or that are not statements of historical matters, although not all forward-looking statements contain such identifying words. Forward-looking statements are predictions, projections and other statements about future events that are based on current expectations and assumptions and, as a result, are subject to risks and uncertainties. Many factors could cause actual future events to differ materially from the forward-looking statements in this press release, including but not limited to: (i) Xos’s liquidity and access to capital when needed, including its ability to service its indebtedness; (ii) Xos’s ability to implement business plans, forecasts, and other expectations, and identify and realize additional opportunities; (iii) cost increases and delays in production due to supply chain shortages in the components needed for the production of Xos's products; (iv) Xos's ability to meet production milestones and fulfill backlog orders; (v) changes in the industries in which Xos operates; (vi) variations in operating performance across competitors; (vii) changes in laws and regulations affecting Xos's business, including changes to tax incentive policies; (viii) Xos's ability to implement its business plan or meet or exceed its financial projections; (ix) Xos's limited operating history; (x) Xos's ability to retain key personnel and hire additional personnel, particularly in light of current and potential labor shortages; (xi) the risk of downturns and a changing regulatory landscape in the highly competitive electric vehicle industry; (xii) macroeconomic and political conditions; and (xiii) the outcome of any legal proceedings that may be instituted against Xos. All forward-looking statements included in this press release are expressly qualified in their entirety by, and you should carefully consider, the foregoing factors and the other risks and uncertainties described under the heading “Risk Factors” included in Xos's most recently filed Annual Report on Form 10-K filed with the U.S. Securities and Exchange Commission (the “SEC”) and any subsequent Quarterly Reports on Form 10-Q filed with the SEC, copies of which may be obtained by visiting Xos's Investors Relations website at https://www.xostrucks.com/sec-filings or the SEC's website at www.sec.gov. These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements. Forward-looking statements speak only as of the date they are made. Readers are cautioned not to put undue reliance on forward-looking statements, and Xos assumes no obligation and does not intend to update or revise these forward-looking statements, whether as a result of new information, future events, or otherwise. Xos does not give any assurance that it will achieve its expectations.

Contacts

Xos Investor Relations

investors@xostrucks.com

Xos Media Relations

press@xostrucks.com

(1) Prior-period amounts have been revised to correct immaterial errors. See Note 19 – Revision of Previously Reported Information of the footnotes accompanying the unaudited condensed consolidated financial statements in our Form 10-Q for the quarter ended June 30, 2026 for more details.

Xos, Inc. and Subsidiaries
Condensed Consolidated Statements of Operations
Unaudited

(1) Prior-period amounts have been revised to correct immaterial errors. See Note 19 – Revision of Previously Reported Information of the footnotes accompanying the unaudited condensed consolidated financial statements in our Form 10-Q for the quarter ended June 30, 2026 for more details.

Reconciliation of Adjusted EBITDA, Operating Cash Flow less CapEx (Free Cash Flow), Non-GAAP Operating Loss and Non-GAAP Gross Profit:

Adjusted EBITDA Reconciliation:

Operating Cash Flow less CapEx (Free Cash Flow):

Non-GAAP Operating Loss:

Non-GAAP Gross Profit: