X0508 4 2025-12-04 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 2025-12-04 4 S 0 7108 24.51 D 22089 D Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units on December 3, 2025. The sale was to satisfy tax withholding obligations to be funded by a 'sell to cover' transaction and does not represent a discretionary transaction by the Reporting Person. /s/ Jason S. Wilcock, as attorney-in-fact for Christian Brown 2025-12-08