Centuri Holdings, Inc.

Disclosure Controls and Procedures

As of September 27, 2026, we evaluated, with the participation of our Chief Executive Officer and Chief Financial Officer, 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) under the Exchange Act. Our disclosure controls and procedures are designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is accumulated and communicated to our management, including our principal executive and principal financial officers, or persons performing similar functions, as appropriate, to allow timely decisions regarding required disclosure. Based on this evaluation, our Chief Executive Officer and Chief Financial Officer, concluded that, as of September 27, 2026, the end of the period covered by this report, our disclosure controls and procedures were effective.

Changes in Internal Control Over Financial Reporting

As discussed in “Note 7 — Acquisitions” to the accompanying condensed consolidated financial statements, the Company completed the acquisition of JJ White on July 20, 2026. Management plans to exclude JJ White from its assessment of internal control over financial reporting as of January 3, 2027 because it was acquired by the Company in a purchase business combination during fiscal year 2026. JJ White is a wholly-owned subsidiary whose total assets and total revenues represent approximately 3.7% and 3.0%, respectively, of the related consolidated financial statements amount as of and for the fiscal nine months ended September 27, 2026.

Except as described above, there have been no changes in the Company’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) during the third fiscal quarter of 2026 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.