X0508 4 2024-12-03 0001981599 Centuri Holdings, Inc. CTRI 0002043826 Brown Christian 19820 NORTH 7TH AVENUE, SUITE 120 PHOENIX AZ 85027 0 1 0 0 Chief Executive Officer 0 Restricted Stock Units 2024-12-03 4 A 0 72992 0 A Common Stock 72992 72992 D Represents the grant of restricted stock units ("RSUs") in connection with the Reporting Person's appointment as Chief Executive Officer, effective December 3, 2024. Each RSU is the economic equivalent of one share of the Issuer's common stock and may be settled by delivery of an equal number of shares of the Issuer's common stock or, in certain circumstances, may be settled in cash. 40% of the RSUs will vest on December 3, 2025, and 30% of the RSUs will vest on each of December 3, 2026 and December 3, 2027, in each case subject to the Reporting Person's continued services through the vesting dates pursuant to that certain offer letter, dated November 4, 2024, by and between the Issuer and the Reporting Person and the applicable award agreement and other terms and conditions set forth therein. /s/ Jason S. Wilcock, as attorney-in-fact for Christian Brown 2024-12-05