X0508 4 2024-07-31 0001981599 Centuri Holdings, Inc. CTRI 0002006412 Fehrman William 19820 NORTH 7TH AVENUE SUITE 120 PHOENIX AZ 85027 1 0 0 0 0 Common Stock 2024-07-31 4 P 0 20000 16.50 A 45000 D Restricted Stock Units 2024-07-31 4 D 0 190476 0 D Common Stock 190476 0 D The purchase transaction reported herein was effected in multiple transactions at prices ranging from $16.31 to $16.54 on July 31, 2024. The price reported above reflects the weighted average purchase price for the transaction reported herein. The Reporting Person hereby undertakes to provide upon request to the Staff of the Securities and Exchange Commission, the Issuer, or any security holder of the Issuer full information regarding the number of shares and the prices at which the reported transaction was effected. On July 12, 2024, the Reporting Person entered into a Transition Agreement with the Issuer pursuant to which, among other things, he agreed to forfeit all of his outstanding restricted stock units on July 31, 2024. /s/ Jason S. Wilcock, as attorney-in-fact for William J. Fehrman 2024-08-01