The accompanying condensed consolidated financial statements include the accounts of Hyliion Holdings Corp. and its wholly owned subsidiary. Intercompany transactions and balances have been eliminated upon consolidation. The condensed consolidated financial statements and accompanying notes have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) and in accordance with the rules and regulations of the United States Securities and Exchange Commission (“SEC”), which permit reduced disclosure for interim periods. The condensed consolidated balance sheet at December 31, 2025 was derived from audited financial statements for the fiscal year then ended, but does not include all necessary disclosures required with respect to annual financial statements. In the opinion of the Company, these condensed consolidated financial statements include all recurring adjustments and normal accruals necessary for a fair presentation of the Company’s financial position, results of operations and cash flows for the dates and periods presented. These condensed consolidated financial statements and accompanying notes should be read in conjunction with the Company’s 2025 Annual Report. Results for interim periods are not necessarily indicative of the results to be expected for a full fiscal year or for any future period.

These condensed consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and settlement of liabilities in the normal course of business. The Company is an early-stage growth company and has generated negative cash flows from operating activities since inception. At June 30, 2026, the Company had total equity of $169.5 million, inclusive of cash and cash equivalents of $13.2 million and total investments of $119.2 million. Based on this, the Company has sufficient funds to continue to execute its business strategy for the next twelve months from the issuance date of the financial statements included in this Quarterly Report on Form 10-Q.

The preparation of financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the balance sheet date, as well as reported amounts of expenses during the reporting period. The Company’s most significant estimates and judgments involve revenue, inventory, income taxes and valuation of share-based compensation. Management bases its estimates on historical experience and on various other assumptions believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results could differ from those estimates, and such differences could be material to the Company’s condensed consolidated financial statements.

ASC 280, Segment Reporting, defines operating segments as components of an enterprise where discrete financial information is available that is evaluated regularly by the chief operating decision-maker ("CODM") in deciding how to allocate resources and in assessing performance. The Company operates as a single operating segment from which all revenue and net income (loss) are derived and for which all assets are attributed. The Company's CODM is the chief executive officer, who has ultimate responsibility for the operating performance of the Company and the allocation of resources. The CODM assesses performance for the single operating segment and decides how to allocate resources based on consolidated net income (loss), which is reported on the condensed consolidated statements of operations, and does not segment the business for internal reporting or decision making. The CODM uses net income (loss), including the significant expense categories presented below, in the annual budgeting and forecasting process and monitors actual results against the budget and forecast on a quarterly basis. The CODM considers budget-to-actual variances in net income (loss) when making decisions about the allocation of operating and capital resources, including the level of investment in research and development activities related to the KARNO Power Module, spending on commercialization efforts, and resources devoted to performance under the Company's government contracts. The CODM also uses net income (loss) to monitor the Company's operating cash requirements and to evaluate the sufficiency of the Company's liquidity to fund planned operations.


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
Total revenues	$	4.9	$	1.5	$	7.8	$	2.0
Total cost of revenues	4.6		1.4		7.2		1.9
Gross profit	0.4		0.1		0.6		0.1

Administrative and office	1.7		1.6		3.3		3.2
Depreciation and amortization	2.1		1.3		4.2		2.4
Facilities	1.3		1.5		2.5		2.9
Personnel	7.1		6.3		14.2		12.6
Product development, exclusive of other costs presented	2.0		3.4		2.2		9.7
Professional services	1.5		1.5		2.9		2.9
Exit and termination costs	(0.3)		(0.3)		(0.7)		1.1
Other operating expense	0.3		0.4		0.6		0.7
Total operating expenses	15.7		15.7		29.2		35.5
Other income, net	1.4		2.2		2.9		4.7
Net loss	$	(13.9)	$	(13.4)	$	(25.7)	$	(30.7)

The Company is dependent on certain suppliers, many of which are single source suppliers, and the inability of these suppliers to deliver necessary components of the Company’s products in a timely manner at prices, quality levels and volumes that are acceptable, or the Company’s inability to efficiently manage these components from these suppliers, could have a material adverse effect on the Company’s business, prospects, financial condition and operating results.

The Company considers all highly liquid investments with a maturity date of 90 days or less at the time of purchase to be cash and cash equivalents only if in checking, savings or money market accounts. Cash and cash equivalents include cash held in banks and money market accounts and are carried at cost, which approximates fair value. The Company maintains cash in excess of federally insured limits at financial institutions, which it believes are of high credit quality, and has not incurred any losses related to these balances to date. The Company believes its credit risk, with respect to these financial institutions, to be minimal.

The Company has provided its corporate headquarters lessor with a letter of credit for $0.7 million to secure the performance of the Company’s lease obligations, backed by a restricted cash deposit to pay any draws on the letter of credit by the lessor. Total cash and cash equivalents and restricted cash as presented in the condensed consolidated statements of cash flows is summarized as follows:

Accounts receivable are stated at the invoiced amount, net of an allowance for credit losses. The Company estimates expected credit losses on its receivables and maintains an allowance at a level considered adequate to provide for those losses based on its evaluation of current conditions as of the balance sheet date, changes in the character and size of the receivable balance, historical loss experience, and other pertinent factors. At June 30, 2026 and December 31, 2025, accounts receivable included amounts receivable from a single customer of $2.5 million and $0.5 million, respectively. At June 30, 2026 and December 31, 2025, there was no allowance for credit losses on customer receivables.

The Company adopted ASU 2025-05, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets, during the quarter ended March 31, 2026, applying the practical expedient under which the Company assumes that current conditions as of the balance sheet date do not change for the remaining life of its current accounts receivable in estimating expected credit losses. There was no material impact as a result of the adoption of this ASU.

The Company’s investments consist of corporate bonds, U.S. treasury and agency securities, state and local municipal bonds and commercial paper, all of which are classified as held-to-maturity, with a maturity date of 36 months or less at the time of purchase. The Company determines the appropriate classification of investments at the time of purchase and re-evaluates such designation as of each balance sheet date. Investments are classified as held-to-maturity when the Company has the positive intent and ability to hold the securities to maturity.

Held-to-maturity securities are stated at amortized cost, adjusted for amortization of premiums and accretion of discounts to maturity, and any expected credit losses. Such amortization, along with interest, is included in interest income. The Company estimates expected credit losses for held-to-maturity investments by considering relevant available information and assessing the risk of loss over the assets’ contractual life. The Company’s portfolio of held-to-maturity investments is of a high credit quality with minimal expected credit losses. The Company uses the specific identification method to determine the cost basis of securities sold.

ASC 820, Fair Value Measurements, clarifies that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based upon assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, ASC 820 establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

The Company’s financial instruments consist of cash and cash equivalents and restricted cash, accounts receivable, investments, accounts payable and accrued expenses. The carrying value of cash and cash equivalents and restricted cash, accounts receivable, accounts payable and accrued expenses approximate fair value because of the short-term nature of those instruments. The fair value of investments is based on quoted prices for identical or similar instruments in markets that are not active. As a result, investments are classified within Level II of the fair value hierarchy.

As of June 30, 2026, we have not yet commercialized the KARNO Power Module. Unless such components are capitalizable, costs incurred for components acquired prior to our determination of reaching a commercial stage are expensed as R&D costs, resulting in zero cost basis for those components. As a result, certain components on hand have a zero cost basis, and inventory capitalized in future periods that incorporates these components will reflect carrying amounts, and related cost of revenue upon sale, that are lower than would result had those components been initially capitalized.

When inventory may be utilized in performance of our contracts with the United States Department of the Navy’s Office of Naval Research (“ONR”), we capitalize that inventory including certain allocations of overhead, labor, and other direct costs and classify it as work-in-process inventory. When this inventory is designated to and utilized in an activity, we record either an R&D or a cost of revenue charge in the period in which the utilization occurs.

All inventory recorded on the balance sheet at June 30, 2026 is classified as work-in-process. Inventory is valued using the specific identification cost method and is stated at the lower of cost or net realizable value. We review our inventory to determine whether its carrying value exceeds the net amount we expect to realize upon the ultimate sale of the inventory.

In September 2024, the Company was awarded a best effort cost-plus-fixed-fee contract of up to $16.0 million by the ONR to research the suitability of its KARNO Power Module for Navy ships and stationary power generation applications. Under the agreement, the Company will provide R&D services through February 2027, including delivery of up to seven KARNO Cores and testing of power module systems. The ONR contract represented a significant change in business strategy toward providing R&D activities in the ordinary course of business in addition to developing Power Modules for stationary and mobile applications.

In July 2025, the Company was awarded a Phase II best effort cost-plus-fixed-fee contract of up to $1.5 million by the ONR to demonstrate the conceptual feasibility of the Phase I effort contract awarded in July 2024 for up to $0.2 million and to show development progress towards successful application. Under the Phase II agreement, including the exercised option, the Company will provide R&D services through July 2027, including design reviews, simulations, and reporting.

There is a single research and development services performance obligation in each of these contracts that is measured over time as the services are performed. The Company generally invoices monthly, which corresponds directly with the value to the customers of the performance completed to date based on the cost of labor and materials utilized, and recognizes revenue in the

In July 2026, the Company was awarded a best effort cost-plus-fixed-fee contract of up to $41.7 million by the ONR. This contract provides for the design, development, construction, testing and delivery of 2-megawatt and 3-megawatt KARNO power generation systems at locations identified by ONR. The Company expects to begin performance on this contract in the fourth quarter of 2026, increasing performance in the second and third quarters of 2027, and continuing through mid-2029.

R&D costs did not meet the requirements to be recognized as an asset as the associated future benefits were at best uncertain and there was no alternative future use at the time the costs were incurred. R&D costs include, but are not limited to, outsourced engineering services, allocated facilities costs, depreciation on equipment utilized in R&D activities, internal engineering and development expenses, materials, internally-developed software and employee-related expenses (including salaries, benefits, travel, and share-based compensation) related to development of the Company’s products and services.

In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements, to improve the guidance in Topic 270, Interim Reporting, by improving the navigability of the required interim disclosures and clarifying when that guidance is applicable, including additional guidance on what disclosures should be provided in interim reporting periods. The pronouncement is effective for interim reporting periods within annual reporting periods beginning after December 15, 2027. We are currently evaluating the impact of adoption.

In September 2025, the FASB issued ASU 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, to modernize the accounting for software costs that are accounted for under Subtopic 350-40, Intangibles—Goodwill and Other—Internal-Use Software. The pronouncement is effective for fiscal years beginning after December 15, 2027 and interim periods within that fiscal year. We are currently evaluating the impact of adoption.

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40), and clarified by ASU 2025-01, to enable investors to better understand the major components of an entity’s income statement. The pronouncement is effective for fiscal years beginning after December 15, 2026 and interim periods beginning after December 15, 2027, and we expect a material impact to our disclosures as a result of adoption.