X0508 4 2025-05-12 0001981599 Centuri Holdings, Inc. CTRI 0002045397 Chilton Kendra 19820 NORTH 7TH AVENUE, SUITE 120 PHOENIX AZ 85027 0 1 0 0 SVP, Chief Accounting Officer 0 Common Stock 2025-05-12 4 M 0 5050 A 5050 D Common Stock 2025-05-12 4 F 0 1333 19.53 D 3717 D Restricted Stock Units 2025-05-12 4 M 0 5050 0 D Common Stock 5050 11405 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. Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of RSUs. This is not an open market sale of securities. On May 12, 2024, the Reporting Person was granted 5,050 RSUs which vested in full on May 12, 2025. /s/ Jason S. Wilcock, as attorney-in-fact for Kendra Chilton 2025-05-14