X0609 4 2026-05-18 0 0001981599 Centuri Holdings, Inc. CTRI 0001446274 Haller Karen S false 19820 NORTH 7TH AVENUE SUITE 120 PHOENIX AZ 85027 1 0 0 0 0 Common Stock 2026-05-18 4 M 0 7338 A 26242 D Common Stock 2026-05-19 4 A 0 4067 0 A 30309 D Restricted Stock Units 2026-05-18 4 M 0 7338 0 D Common Stock 7338 0 D On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant 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 2025 RSU Grant. Represents the grant of RSUs pursuant to the Plan on May 19, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and will be settled by delivery of one share of the Issuer's common stock. /s/ Jason S. Wilcock, as attorney-in-fact for Karen S. Haller 2026-05-20