X0508 4 2025-12-03 0 0001981599 Centuri Holdings, Inc. CTRI 0002043826 Brown Christian 19820 NORTH 7TH AVENUE, SUITE 120 PHOENIX AZ 85027 1 1 0 0 Chief Executive Officer 0 Common Stock 2025-12-03 4 M 0 29197 A 29197 D Restricted Stock Units 2025-12-03 4 M 0 29197 0 D Common Stock 29197 103608 D Each restricted stock unit (RSU) is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the RSUs. On December 3, 2024, the Reporting Person was granted 72,992 RSUs, 40% of which vested on December 3, 2025, and 30% of which 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 2025-12-05