Description of Business	3 Months Ended
Mar. 29, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Organization Structure Centuri Holdings, Inc. (“Holdings” and, together with its consolidated subsidiaries, the “Company” or “Centuri”) is a holding company incorporated in Delaware. Substantially all of the Company’s operations are conducted through Centuri Group, Inc. (the “Operating Company”), which is a wholly owned subsidiary of Holdings. Holdings completed an initial public offering (“IPO”) in April 2024. Following the IPO, the Company’s former parent, Southwest Gas Holdings, Inc. (“Southwest Gas Holdings”), reduced its ownership interest through a series of secondary offerings and private placements which culminated in Southwest Gas Holdings no longer owning any equity interest in the Company effective September 5, 2025. Accordingly, the Company no longer qualifies as a “controlled company” under the New York Stock Exchange rules. Description of Operations The Company is a North American utility and energy infrastructure services company, and it partners with regulated utilities to maintain, upgrade, and expand the energy network that powers millions of homes and businesses. The Company’s service offerings primarily consist of the modernization of utility infrastructure through the replacement, maintenance, retrofitting and installation of electric and natural gas distribution and utility-scale transmission networks and building capacity to meet current and future demands. The Company operates through a family of complementary companies working together across different geographies to establish solid customer relationships and a strong reputation for a wide range of capabilities. In November 2025, the Company completed the acquisition of the equity interests in Connect Atlantic Utility Services Corporation (“Connect”), an Atlantic Canada electric utility services provider. Connect’s results are included in the Canadian Operations segment. Connect’s revenue during the first fiscal quarter of 2026 was approximately $23.2 million, and Connect’s earnings were not material. The Company did not record any measurement period adjustments during the first fiscal quarter of 2026. Due to the estimations made, the final purchase accounting has not yet been completed and further refinements may occur.

Centuri Holdings, Inc. (“Holdings” and, together with its consolidated subsidiaries, the “Company” or “Centuri”) is a holding company incorporated in Delaware. Substantially all of the Company’s operations are conducted through Centuri Group, Inc. (the “Operating Company”), which is a wholly owned subsidiary of Holdings.

Holdings completed an initial public offering (“IPO”) in April 2024. Following the IPO, the Company’s former parent, Southwest Gas Holdings, Inc. (“Southwest Gas Holdings”), reduced its ownership interest through a series of secondary offerings and private placements which culminated in Southwest Gas Holdings no longer owning any equity interest in the Company effective September 5, 2025. Accordingly, the Company no longer qualifies as a “controlled company” under the New York Stock Exchange rules.

The Company is a North American utility and energy infrastructure services company, and it partners with regulated utilities to maintain, upgrade, and expand the energy network that powers millions of homes and businesses. The Company’s service offerings primarily consist of the modernization of utility infrastructure through the replacement, maintenance, retrofitting and installation of electric and natural gas distribution and utility-scale transmission networks and building capacity to meet current and future demands. The Company operates through a family of complementary companies working together across different geographies to establish solid customer relationships and a strong reputation for a wide range of capabilities.

In November 2025, the Company completed the acquisition of the equity interests in Connect Atlantic Utility Services Corporation (“Connect”), an Atlantic Canada electric utility services provider. Connect’s results are included in the Canadian Operations segment. Connect’s revenue during the first fiscal quarter of 2026 was approximately $23.2 million, and Connect’s earnings were not material. The Company did not record any measurement period adjustments during the first fiscal quarter of 2026. Due to the estimations made, the final purchase accounting has not yet been completed and further refinements may occur.