COMMERCIAL METALS Co

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the stockholders and the Board of Directors of Commercial Metals Company

Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of Commercial Metals Company and subsidiaries (the "Company") as of August 31, 2026, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of August 31, 2026, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended August 31, 2026, of the Company and our report dated October 15, 2026, expressed an unqualified opinion on those financial statements.

As described in Management's Report on Internal Control Over Financial Reporting, management excluded from its assessment the internal control over financial reporting at Foley Products Company, LLC ("Foley") and Concrete Pipe & Precast, LLC ("CP&P"), which were acquired on December 15, 2025 and December 1, 2025, respectively, and whose financial statements each constitute approximately 3% of net sales and approximately 3% and 2% of total assets, respectively, of the consolidated financial statement amounts as of and for the year ended August 31, 2026. Accordingly, our audit did not include the internal control over financial reporting at Foley or CP&P.

Basis for Opinion

The Company's management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's report on Internal Control Over Financial Reporting . Our responsibility is to express an opinion on the Company's internal control over financial reporting based on our audit. 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 audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/Deloitte & Touche LLP

Dallas, Texas

October 15, 2026

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the stockholders and the Board of Directors of Commercial Metals Company

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Commercial Metals Company and subsidiaries (the "Company") as of August 31, 2026 and 2025, the related consolidated statements of earnings, comprehensive income, stockholders' equity, and cash flows, for each of the three years in the period ended August 31, 2026, and the related notes and the schedule listed in the Index at Item 15 (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of August 31, 2026 and 2025, and the results of its operations and its cash flows for each of the three years in the period ended August 31, 2026, in conformity with accounting principles generally accepted in the United States of America.

We have also 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 August 31, 2026, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated October 15, 2026, expressed an unqualified opinion on the Company's internal control over financial reporting.

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 critical audit matters does not alter in any way our opinion on the 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 accounts or disclosures to which it relates.

Goodwill — Annual impairment test for one Reporting Unit within the Construction Solutions Group segment – Refer to Notes 1 and 6 to the Financial Statements

Critical Audit Matter Description

Goodwill is tested for impairment at the reporting unit level annually as of the first day of the Company’s fourth quarter and whenever events or circumstances indicate that the carrying value exceeds its fair value. As of the 2026 annual impairment test date, the Company had goodwill of $2.1 billion, of which $195 million related to one reporting unit within the Construction Solutions Group segment. The Company’s goodwill impairment assessment involves comparing the fair value of each reporting unit to its carrying value. The Company estimates the fair value of its reporting units using a weighting of fair values derived from the income and market approaches. The determination of fair value using the income approach is based on the present value of estimated future cash flows, which requires management to make significant estimates and assumptions of revenue growth rates and operating margins, and selection of the discount rate. The determination of the fair value using the market approach requires management to make significant assumptions related to market multiples of earnings derived from comparable publicly traded companies with similar operating and investment characteristics as the reporting unit.

Based on the results of the Company’s annual impairment testing, no impairment was recognized as the fair value of the Company’s reporting units exceeded their carrying value.

We identified the Company’s goodwill impairment assessment as of the first day of the Company’s fourth quarter for the $195 million of goodwill related to one reporting unit within the Construction Solutions Group segment as a critical audit matter because of the significant estimates and assumptions used by management to estimate the fair value of the reporting unit. This required a high degree of auditor judgment and an increased extent of effort, including the need to involve our fair value specialists, when performing audit procedures to evaluate the reasonableness of management’s estimates and assumptions of future cash flows based on estimates of revenue growth rates and operating margins and selection of the discount rate for the income approach, and multiples of earnings for the market approach.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the annual goodwill impairment assessment for one reporting unit within the Construction Solutions Group segment included the following, among others:

•We tested the effectiveness of controls over the goodwill impairment assessment, including management’s controls over forecasts of future cash flows based on estimates of revenue growth rates and operating margins and the selection of the discount rate for the income approach, and determination of multiples of earnings for the market approach.

•We evaluated the reasonableness of management’s forecasts of future cash flows based on revenue growth rates and operating margins by comparing the forecasts to (1) historical revenues and operating margins and (2) forecasted information included in industry reports.

•With the assistance of our fair value specialists:

◦We evaluated the reasonableness of the valuation methodologies.

◦We evaluated the reasonableness of the discount rate used in the income approach by developing an independent range of estimated discount rates and comparing that range to the discount rate used in the Company’s valuation.

◦We evaluated the multiples of earnings used in the market approach, including testing the underlying source information and mathematical accuracy of the calculations.

/s/ Deloitte & Touche LLP

Dallas, Texas

October 15, 2026

We have served as the Company's auditor since 1959.