WABASH NATIONAL Corp

Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of Wabash National Corporation

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Wabash National Corporation (the Company) as of December 31, 2025 and 2024, the related consolidated statements of operations, comprehensive income (loss), stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2025, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2025 and 2024, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2025, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2025, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 18, 2026 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the account or disclosure to which it relates.

To test the estimated fair values of the Company’s reporting units, we performed audit procedures that included, among others, assessing methodologies, testing the significant assumptions discussed above used to develop the prospective financial information, and testing the underlying data used by the Company in its analysis. We compared the prospective financial information developed by management to the historical performance of each reporting unit as well as current industry and economic trends and evaluated the expected impacts of the Company’s operating strategies and initiatives on the significant assumptions. In addition, we tested management’s reconciliation of the fair value of the reporting units to the market capitalization of the Company. We involved our internal valuation specialists to assist in our evaluation of the methodologies used by the Company, the discount rate assumptions and the calculations of each reporting unit’s fair value.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2002.

Indianapolis, Indiana

February 18, 2026