DYCOM INDUSTRIES INC

Disclosure Controls and Procedures

The Company carried out an evaluation under the supervision and with the participation of the Company’s management, including the Company’s Chief Executive Officer and its Chief Financial Officer, of the effectiveness of the design and operation of the Company’s disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (the “Exchange Act”)) as of January 27, 2024, the end of the period covered by this Annual Report on Form 10-K. Based on this evaluation, the Chief Executive Officer and Chief Financial Officer concluded that, as of

January 27, 2024, the Company’s disclosure controls and procedures are effective to provide reasonable assurance that information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act is (1) recorded, processed, summarized and reported within the time periods specified by the Securities and Exchange Commission’s rules and forms, and (2) accumulated and communicated to the Company’s management, including the Company’s Chief Executive Officer and Chief Financial Officer, in a manner that allows timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

There were no changes in the Company’s internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) that occurred during the Company’s fourth quarter of fiscal 2024 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

Management’s Report on Internal Control Over Financial Reporting

Management of Dycom Industries, Inc. and subsidiaries is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rule 13a-15(f) and 15(d)-15(f) under the Securities Exchange Act of 1934. The Company’s internal control over financial reporting is 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. There are inherent limitations in the effectiveness of any system of internal control, including the possibility of human error and overriding of controls. Consequently, an effective internal control system can only provide reasonable, not absolute assurance, with respect to reporting financial information. Further, because of changes in conditions, effectiveness of internal control over financial reporting may vary over time.

The SEC’s general guidance permits the exclusion of an assessment of the effectiveness of a registrant’s disclosure controls and procedures as they relate to its internal control over financial reporting for an acquired business during the first year following such acquisition if, among other circumstances and factors, there is not adequate time between the acquisition date and the date of assessment. As previously noted in this Form 10-K, we acquired Bigham on August 18. 2023. This acquisition represents approximately 6.7% of our total assets as of January 27, 2024 and 2.5% of our total contract revenues for the fiscal year ended January 27, 2024. See Note 5, Acquisitions, of the Notes to the Consolidated Financial Statements for additional information regarding the acquisition. Management’s assessment and conclusion on the effectiveness of the Company’s disclosure controls and procedures as of January 27, 2024 excludes an assessment of internal control over financial reporting of Bigham.

Management conducted an evaluation of the effectiveness of our internal control over financial reporting based on the Internal Control-Integrated Framework (2013)issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that the Company’s internal control over financial reporting was effective as of January 27, 2024.

The effectiveness of the Company’s internal control over financial reporting as of January 27, 2024 has been audited by PricewaterhouseCoopers LLP, the Company’s independent registered public accounting firm. Their report, which is set forth in Part II, Item 8, Financial Statements, of this Annual Report on Form 10-K, expresses an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting as of January 27, 2024.