X0202 SCHEDULE 13G 0001866872 XXXXXXXX LIVE Common Stock, par value $0.01 per share 06/30/2026 0001981599 Centuri Holdings, Inc. 155923105 19820 NORTH 7TH AVENUE SUITE 120 PHOENIX AZ 85027 Rule 13d-1(b) Carronade Capital Management, LP DE 0.00 5516741.00 0.00 5516741.00 5516741.00 N 5.5 IA PN Includes 220,900 shares of Common Stock issuable upon exercise of call options. Dan Gropper X1 0.00 5516741.00 0.00 5516741.00 5516741.00 N 5.5 HC IN Includes 220,900 shares of Common Stock issuable upon exercise of call options. Centuri Holdings, Inc. 19820 North 7th Avenue, Suite 120, Phoenix, AZ 85027 This statement is filed by Carronade Capital Management, LP (the "Investment Manager") and Dan Gropper (the "Mr. Gropper"). The foregoing persons are hereinafter sometimes referred to as the "Reporting Persons." The Investment Manager is a registered investment adviser and serves as the investment manager to certain funds and accounts (the "Carronade Funds"), and may be deemed to beneficially own the shares of Common Stock, par value $0.01 per share (the "Common Stock), of Centuri Holdings, Inc. (and the shares of Common Stock issuable upon exercise of call options) held by the Carronade Funds. Mr. Gropper, as the Managing Member of Carronade Capital Management GP, LLC, the general partner of the Investment Manager, indirectly controls the Investment Manager and may be deemed to beneficially own the shares of Common Stock (and the shares of Common Stock issuable upon exercise of call options) held by the Carronade Funds. The filing of this statement should not be construed as an admission that any of the foregoing persons or any Reporting Person is, for the purposes of Section 13 of the Securities Exchange Act of 1934, the beneficial owner of the securities reported herein. Carronade Capital Management, LP 17 Old Kings Highway South Darien, CT 06820 Dan Gropper c/o Carronade Capital Management, LP 17 Old Kings Highway South Darien, CT 06820 Carronade Capital Management, LP - Delaware Mr. Gropper - United States of America N IA HC The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 100,934,662 shares of Common Stock outstanding as of May 4, 2026, as reported in the Company's Registration Statement on Form S-3, filed with the Securities and Exchange Commission on May 13, 2026. 5.5% The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for each of the Reporting Persons and is incorporated herein by reference. Y N See Item 2(a). Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Exhibit 99.1: Joint Filing Agreement Carronade Capital Management, LP /s/ Rinarisa Coronel DeFronze 08/14/2026 Dan Gropper /s/ Dan Gropper 08/14/2026