X0508 4 2026-01-30 1 0001981599 Centuri Holdings, Inc. CTRI 0002016584 Connell James W. Jr. 19820 NORTH 7TH AVENUE SUITE 120 PHOENIX AZ 85027 0 1 0 0 See Remarks 0 Common Stock 2026-01-30 4 M 0 19011 A 43471 D Common Stock 2026-01-30 4 F 0 5280 27.83 D 38191 D Restricted Stock Units 2026-01-30 4 M 0 19011 0 D Common Stock 19011 11791 D Restricted Stock Units 2026-01-31 4 D 0 11791 0 D Common Stock 11791 0 D Performance Stock Units 2026-01-31 4 D 0 17687 0 D Common Stock 17687 0 D Each restricted stock unit ("RSU") is the economic equivalent of one share of the Centuri Holdings, Inc.'s (the "Issuer") 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 July 30, 2024, the Reporting Person was granted 19,011 RSUs, which vested in full on January 30, 2026. On February 25, 2025, the Reporting Person was granted 11,791 RSUs, which were to vest ratably over three years, with one-third of the RSUs to vest on each of the first three anniversaries of the date of grant. A total of 11,791 RSUs were forfeited in connection with the Reporting Person's resignation from the Issuer on January 31, 2026. Each performance stock unit ("PSU") is the economic equivalent of one share of the Issuer's common stock. On February 25, 2025, the Reporting Person was granted 17,687 PSUs, which were eligible to be earned by the Reporting Person based on the achievement of certain performance metrics, as set forth in the applicable PSU award agreement by and between the Issuer and the Reporting Person, over a one-year initial performance period from January 1, 2025 to December 31, 2025 and a subsequent two-year performance period from January 1, 2026 to December 31, 2027 (collectively, the "Performance Period"). Earned shares would have vested after the Performance Period. A total of 17,687 PSUs were forfeited in connection with the Reporting Person's resignation from the Issuer on January 31, 2026. The Reporting Person's full title is "Chief Commercial and Strategy Officer" /s/ Jason S. Wilcock, as attorney-in-fact for James W. Connell, Jr. 2026-02-03