Worthington Steel, Inc.

Evaluation of Disclosure Controls and Procedures

As of the end of the period covered by this Form 10-K (the fiscal year ended May 31, 2025), we carried out an evaluation, under the supervision and with the participation of our management, including our CEO and Chief Financial Officer (“CFO”), of the effectiveness of the design and operation of our disclosure controls and procedures, as such term is defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act. Based upon that evaluation, our management, including our CEO and CFO, concluded that as of the end of the period covered by this Form 10-K, our disclosure controls and procedures were effective and designed to ensure that information required to be disclosed by us in reports we file or submit under the Exchange Act is (1) recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and (2) accumulated and communicated to our management, including our CEO and CFO, to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

There were no changes in our internal control over financial reporting that occurred in the fourth quarter of fiscal 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Annual Report of Management on Internal Control Over Financial Reporting

Management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a‑15(f) and 15d‑15(f) under the Exchange Act, for external purposes in accordance with GAAP. Internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of Worthington Steel and its consolidated subsidiaries; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that receipts and expenditures of Worthington Steel and its consolidated subsidiaries are being made only in accordance with authorizations of management and directors of Worthington Steel and our consolidated subsidiaries, as appropriate; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the assets of Worthington Steel and its consolidated subsidiaries that could have a material effect on the financial statements.

Management, with the participation of Worthington Steel’s principal executive officer and principal financial officer, evaluated the effectiveness of our internal control over financial reporting as of May 31, 2025, the end of our fiscal year. Management based its assessment on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. The scope of the assessment included all of our consolidated operations.

Management’s assessment included an evaluation of elements such as the design and operating effectiveness of key controls over financial reporting, process documentation, accounting policies and our overall control environment. This assessment is supported by testing and monitoring performed under the direction of management.

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. Accordingly, even an effective system of internal control over financial reporting will provide only reasonable assurance with respect to financial statement preparation.

Based on the assessment of our internal control over financial reporting, management has concluded that our internal control over financial reporting was effective as of May 31, 2025. The results of management’s assessment were reviewed with the Audit Committee of the Board.

Additionally, Worthington Steel’s independent registered public accounting firm, KPMG LLP, independently assessed the effectiveness of our internal control over financial reporting and issued the accompanying Report of Independent Registered Public Accounting Firm.

Report of Independent Registered Public Accounting Firm

To the Shareholders and Board of Directors

Worthington Steel, Inc.:

Opinion on Internal Control Over Financial Reporting

We have audited Worthington Steel, Inc. and subsidiaries' (the Company) internal control over financial reporting as of May 31, 2025, based on criteria established in Internal Control – Integrated Framework (2013)issued by the Committee of Sponsoring Organizations of the Treadway Commission. In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of May 31, 2025, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of May 31, 2025 and 2024, the related consolidated and combined statements of earnings, comprehensive income, shareholders’ equity, and cash flows for each of the years in the three-year period ended May 31, 2025, and the related notes and financial statement schedule II (collectively, the consolidated and combined financial statements), and our report dated July 29, 2025 expressed an unqualified opinion on those consolidated and combined financial statements.

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 Annual Report of Management 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 of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included 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/ KPMG LLP

Indianapolis, Indiana

July 29, 2025