UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): September 3, 2025

Centuri Holdings, Inc.

(Exact Name of Registrant as Specified in its Charter)


Delaware	001-42022	93-1817741

(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

19820 North 7th Avenue, Suite 120

Phoenix, Arizona 85027

(Address of Principal Executive Offices)

Registrant’s telephone number, including area code: (623) 582-1235

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading

Symbol(s)

Name of exchange

on which registered

Common Stock, $0.01 per share par value

CTRI

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 8.01 Other Events.

On September 3, 2025, Centuri Holdings, Inc. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with J.P. Morgan Securities LLC (the “Underwriter”) and Southwest Gas Holdings, Inc. (the “Selling Stockholder”) relating to the offer and sale (the “Offering”) by the Selling Stockholder of 27,362,210 shares of its holdings of the Company’s common stock, par value $0.01 per share (“Centuri Common Stock”). The price to the public in the Offering was $19.60 per share. The Offering was made under a prospectus supplement specifically relating to the Offering dated September 3, 2025 (the “Prospectus Supplement”) and related prospectus filed with the Securities and Exchange Commission pursuant to the Company’s effective shelf registration statement on Form S-3 (Registration No. 333-287200).

The Offering closed on September 5, 2025 (the “Closing Date”), pursuant to which the Selling Stockholder sold a total of 27,362,210 shares of Centuri Common Stock. The Company did not receive any of the proceeds from the sale of shares by the Selling Stockholder. As of the Closing Date, the Selling Stockholder no longer owns any shares of Centuri Common Stock. Accordingly, the Selling Stockholder no longer has certain governance rights afforded to it under that certain Separation Agreement, dated as of April 11, 2024, by and between the Selling Stockholder and the Company, including the right to nominate any of the Company’s directors and any remaining consent rights over certain of the Company’s corporate actions.

Under the terms of the Underwriting Agreement, the Company, the Company’s directors and executive officers, the Selling Stockholder and certain of their respective affiliates also agreed not to sell or transfer any Centuri Common Stock without first obtaining the written consent of the Underwriter, subject to certain exceptions, for 30 days after the date of the Prospectus Supplement.

The Underwriting Agreement contains customary representations, warranties, covenants, indemnification obligations of the Company, the Selling Stockholder and the Underwriter, including for liabilities under the Securities Act, and other obligations of the parties. The representations, warranties and covenants contained in the Underwriting Agreement were made only for purposes of such agreement and as of specific dates, were solely for the benefit of the parties to such agreement, and may be subject to limitations agreed upon by the contracting parties. A copy of the Underwriting Agreement is filed as Exhibit 1.1 hereto and is incorporated herein by reference. The foregoing descriptions of the Underwriting Agreement and lock-up arrangements do not purport to be complete and are qualified in their entirety by reference to such exhibit.

A copy of the opinion of Morrison & Foerster LLP relating to the validity of the securities issued and sold in the Offering is filed herewith as Exhibit 5.1.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.


Exhibit No.						Description
1.1+						Underwriting Agreement, dated as of September 3, 2025, by and among Centuri Holdings Inc., Southwest Gas Holdings, Inc. and J.P. Morgan Securities LLC.
5.1						Opinion of Morrison & Foerster LLP.
23.1						Consent of Morrison & Foerster LLP (included in Exhibit 5.1).
104						Cover Page Interactive Data File, formatted in Inline XBRL.


+			Certain of the schedules and attachments to this exhibit have been omitted in accordance with Regulation S-K, Item 601(a)(5). The registrant hereby undertakes to provide further information regarding such omitted materials to the SEC upon request.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.


	CENTURI HOLDINGS, INC.

Date: September 5, 2025	By:	/s/ Gregory A. Izenstark
		Gregory A. Izenstark
		Executive Vice President and Chief Financial Officer

Centuri Holdings, Inc. 8-K