Centuri Holdings, Inc. Sample Contracts

Centuri Holdings, Inc. [●] Shares of Common Stock Underwriting Agreement
Underwriting Agreement • March 22nd, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

Centuri Holdings, Inc., a Delaware corporation (the “Company”), proposes to issue and sell to the several underwriters listed in Schedule 1 hereto (the “Underwriters”), for whom you are acting as representatives (the “Representatives”), an aggregate of [●] shares of Common Stock, par value $0.01 per share (“Common Stock”), of the Company (the “Underwritten Shares”). In addition, the Company proposes to issue and sell, at the option of the Underwriters, up to an additional [●] shares of Common Stock (the “Option Shares”). The Underwritten Shares and the Option Shares are herein referred to as the “Shares”. The shares of Common Stock of the Company to be outstanding after giving effect to the sale of the Shares are referred to herein as the “Stock”.

Centuri Holdings, Inc. 9,000,000 Shares of Common Stock Underwriting Agreement
Underwriting Agreement • May 22nd, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

Southwest Gas Holdings, Inc., a stockholder (the “Selling Stockholder”) of Centuri Holdings, Inc., a Delaware corporation (the “Company”), proposes to sell to the several underwriters listed in Schedule 1 hereto (the “Underwriters”), for whom you are acting as representative (the “Representative”), an aggregate of 9,000,000 shares of Common Stock, par value $0.01 per share (“Common Stock”), of the Company (the “Underwritten Shares”). In addition, the Selling Stockholder proposes to sell, at the option of the Underwriters, up to an additional 1,350,000 shares of Common Stock (the “Option Shares”). The Underwritten Shares and the Option Shares are herein referred to as the “Shares”. The shares of Common Stock of the Company to be outstanding after giving effect to the sale of the Shares are referred to herein as the “Stock”.

FORM OF REGISTRATION RIGHTS AGREEMENT among CENTURI HOLDINGS, INC., AND SOUTHWEST GAS HOLDINGS, INC. DATED , 2024
Registration Rights Agreement • March 22nd, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • Delaware

THIS REGISTRATION RIGHTS AGREEMENT, dated as of [●], 2024 (this “Agreement”), is entered into by and between Centuri Holdings, Inc., a Delaware corporation (together with any successor entity thereto, the “Company”), and Southwest Gas Holdings, Inc. (“Southwest”).

SEPARATION AGREEMENT BY AND BETWEEN SOUTHWEST GAS HOLDINGS, INC. AND CENTURI HOLDINGS, INC. DATED AS OF APRIL 11, 2024
Separation Agreement • February 26th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

This SEPARATION AGREEMENT, dated as of April 11, 2024 (this “Agreement”), is by and between Southwest Gas Holdings, Inc., a Delaware corporation (“Southwest”), and Centuri Holdings, Inc., a Delaware corporation (“Centuri”). Capitalized terms used herein and not otherwise defined shall have the respective meanings assigned to them in Article I.

RECEIVABLES PURCHASE AGREEMENT Dated as of September 20, 2024 by and among CENTURI SPECIAL PURPOSE ENTITY, LLC, as Seller, THE PERSONS FROM TIME TO TIME PARTY HERETO, as Purchasers, PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent, CENTURI...
Receivables Purchase Agreement • September 25th, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

This RECEIVABLES PURCHASE AGREEMENT (as amended, restated, supplemented or otherwise modified from time to time, this “Agreement”) is entered into as of September 20, 2024 by and among the following parties:

EMPLOYMENT AGREEMENT
Employment Agreement • March 22nd, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • Nevada

This Employment Agreement (the “Agreement”) is entered into between Centuri Construction Group, Inc. (“Centuri” or “Company”), a Nevada corporation, and James W. Connell, Jr. (“Employee”) on this 20th day of March, 2017 (the “Effective Date”). For purposes of this Agreement, “Employer” shall mean Centuri or any other affiliated entity that is deemed to be the employer of Employee, and “Employer Group” shall mean Centuri and its predecessors, successors, and past, present and future operating companies, divisions, subsidiaries and/or affiliates.

FORM OF TAX MATTERS AGREEMENT BY AND AMONG SOUTHWEST GAS HOLDINGS, INC. AND CENTURI HOLDINGS, INC. DATED AS OF [•]
Tax Matters Agreement • April 8th, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

This TAX MATTERS AGREEMENT (this “Agreement”) is made as of [•], 202[•] by and between Southwest Gas Holdings, Inc., a Delaware corporation (“Parent”) and Centuri Holdings, Inc., a Delaware corporation and wholly-owned subsidiary of Parent (“Centuri” and, together with Parent, the “Parties”). Capitalized terms used in this Agreement and not defined herein shall have the meanings ascribed to such terms in the Separation Agreement, dated as of the date hereof, by and between the Parties and, prior to a Trigger Event, in the form attached to the Centuri Certificate of Incorporation as Exhibit A (the “Separation Agreement”).

AMENDED AND RESTATED COOPERATION AGREEMENT
Cooperation Agreement • March 22nd, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

This Amended and Restated Cooperation Agreement, dated as of November 21, 2023 (this “Agreement”), is by and among the persons and entities listed on Schedule A (collectively, the “Icahn Group”, and each individually a “member” of the Icahn Group) and Southwest Gas Holdings, Inc. (the “Company”).

AWARD AGREEMENT FOR TIME-LAPSE RESTRICTED STOCK UNITS UNDER THE CENTURI HOLDINGS, INC. OMNIBUS INCENTIVE PLAN
Award Agreement for Time-Lapse Restricted Stock Units • April 19th, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

This Award Agreement for Time-Lapse Restricted Stock Units, together with Appendix A (this “Award Agreement”) is dated as of April 19, 2024, by and between Centuri Holdings, Inc., a Delaware corporation (the “Company”), and William J. Fehrman (the “Participant”), pursuant to the Centuri Holdings, Inc. Omnibus Incentive Plan (the “Plan”). Capitalized terms that are used, but not defined, in this Award Agreement, including Appendix A of this Award Agreement, shall have the meaning set forth in the Plan, and the Plan is incorporated by reference into this Award Agreement.

THIRD AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT Dated as of November 13, 2023
Credit Agreement • March 22nd, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

This THIRD AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”) is by and among CENTURI GROUP, INC., a Nevada corporation (the “Company”), and each Additional Borrower that becomes a party thereto in accordance with Section 5.17 thereto, as US Borrowers, CENTURI CANADA DIVISION INC., a corporation organized under the laws of the Province of Ontario, Canada, and each Additional Borrower that becomes a party thereto in accordance with Section 5.17 thereto, as Canadian Borrowers, the other Credit Parties party hereto, the lenders party hereto (the “Lenders”) and WELLS FARGO BANK, NATIONAL ASSOCIATION, as administrative agent for the Lenders (in such capacity, the “Administrative Agent”).

TAX MATTERS AGREEMENT BY AND BETWEEN SOUTHWEST GAS HOLDINGS, INC. AND CENTURI HOLDINGS, INC. DATED AS OF APRIL 11, 2024
Tax Matters Agreement • February 26th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

This TAX MATTERS AGREEMENT (this “Agreement”) is made as of April 11, 2024 by and between Southwest Gas Holdings, Inc., a Delaware corporation (“Parent”) and Centuri Holdings, Inc., a Delaware corporation and wholly-owned subsidiary of Parent (“Centuri” and, together with Parent, the “Parties”). Capitalized terms used in this Agreement and not defined herein shall have the meanings ascribed to such terms in the Separation Agreement, dated as of the date hereof, by and between the Parties and, prior to a Trigger Event, in the form attached to the Centuri Certificate of Incorporation as Exhibit A (the “Separation Agreement”).

SALE AND CONTRIBUTION AGREEMENT Dated as of September 20, 2024 among EACH OF THE PERSONS FROM TIME TO TIME PARTY HERETO, as Originators, CENTURI GROUP, INC. as Servicer, and CENTURI SPECIAL PURPOSE ENTITY, LLC, as Buyer
Sale and Contribution Agreement • September 25th, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

This SALE AND CONTRIBUTION AGREEMENT (as amended, restated, supplemented or otherwise modified from time to time, this “Agreement”), dated as of September 20, 2024 is entered into among the PERSONS LISTED AS ORIGINATORS ON SCHEDULE I HERETO and each Person that becomes a party hereto as an Originator from time to time pursuant to Section 4.2 hereof (collectively, the “Originators” and each, an “Originator”), CENTURI GROUP, INC., a Nevada corporation (“Centuri Group”), as Servicer (the “Servicer”), and Centuri Special Purpose Entity, LLC, a Delaware limited liability company (the “Buyer”).

Centuri Holdings, Inc. 9,750,000 Shares of Common Stock Underwriting Agreement
Underwriting Agreement • June 18th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

Southwest Gas Holdings, Inc., a stockholder (the “Selling Stockholder”) of Centuri Holdings, Inc., a Delaware corporation (the “Company”), proposes to sell to the several underwriters listed in Schedule 1 hereto (the “Underwriters”), for whom you are acting as representative (the “Representative”), an aggregate of 9,750,000 shares of Common Stock, par value $0.01 per share (“Common Stock”), of the Company (the “Underwritten Shares”). In addition, the Selling Stockholder proposes to sell, at the option of the Underwriters, up to an additional 1,462,500 shares of Common Stock (the “Option Shares”). The Underwritten Shares and the Option Shares are herein referred to as the “Shares”. The shares of Common Stock of the Company to be outstanding after giving effect to the sale of the Shares are referred to herein as the “Stock”.

SECOND AMENDED AND RESTATED CREDIT AGREEMENT dated as of August 27, 2021 by and among CENTURI GROUP, INC., and each Additional Borrower, as US Borrowers, CENTURI CANADA DIVISION INC., and each Additional Borrower, as Canadian Borrowers, the Lenders...
Credit Agreement • March 22nd, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

SECOND AMENDED AND RESTATED CREDIT AGREEMENT, dated as of August 27, 2021, by and among CENTURI GROUP, INC., a Nevada corporation, and each Additional Borrower that becomes a party hereto in accordance with Section 5.17, as US Borrowers, CENTURI CANADA DIVISION INC., a corporation organized under the laws of the Province of Ontario, Canada, and each Additional Borrower that becomes a party hereto in accordance with Section 5.17, as Canadian Borrowers, the lenders who are party to this Agreement and the lenders who may become a party to this Agreement pursuant to the terms hereof, as Lenders, and WELLS FARGO BANK, NATIONAL ASSOCIATION, a national banking association, as Administrative Agent for the Lenders.

Re: Centuri Holdings, Inc. (the “Company”) Registration Rights
Registration Rights Agreement • November 14th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

11, 2025 (the “November 2025 Private Placement Agreement”), by and among the Company, on the one hand, and Icahn Partners LP and Icahn Partners Master Fund LP (each, an “Investor” and collectively, the Investors”), on the other hand, pursuant to which the Company has agreed to issue and sell approximately $75 million of shares of the Company’s common stock, $0.01 par value per share (“Common Stock”), to the Investors in a private placement (the “Private Placement”) at a price per share equal to the Follow-On Offering price per share (as defined in the November 2025 Private Placement Agreement) and (ii) that certain Common Stock Purchase Agreement (the “IPO Private Placement Agreement”), dated April 5, 2024, by and among the Company and the Investors. The shares of Common Stock actually issued and sold by the Company to the Investors in the Private Placement are referred to herein as the “November 2025 Private Placement Shares.”

FIRST AMENDMENT TO RECEIVABLES PURCHASE AGREEMENT
Receivables Purchase Agreement • August 4th, 2026 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

This FIRST AMENDMENT TO THE RECEIVABLES PURCHASE AGREEMENT (this “Amendment”), dated as of May 4, 2026, is entered into by and among the following parties:

FIRST AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT Dated as of November 4, 2022
Credit Agreement • March 22nd, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

SECOND AMENDED AND RESTATED CREDIT AGREEMENT, dated as of August 27, 2021, by and among CENTURI GROUP, INC., a Nevada corporation, and each Additional Borrower that becomes a party hereto in accordance with Section 5.17, as US Borrowers, CENTURI CANADA DIVISION INC., a corporation organized under the laws of the Province of Ontario, Canada, and each Additional Borrower that becomes a party hereto in accordance with Section 5.17, as Canadian Borrowers, the lenders who are party to this Agreement and the lenders who may become a party to this Agreement pursuant to the terms hereof, as Lenders, and WELLS FARGO BANK, NATIONAL ASSOCIATION, a national banking association, as Administrative Agent for the Lenders.

Re: Centuri Holdings, Inc. (the “Company”) Registration Rights
Registration Rights Agreement • June 18th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

Reference is made to (i) that certain Common Stock Purchase Agreement, dated as of June 13, 2025 (the “June 2025 Private Placement Agreement”), by and among Southwest Gas Holdings, Inc. (“Southwest Gas”) and Icahn Partners LP and Icahn Partners Master Fund LP (each, an “Investor” and collectively, the Investors”), pursuant to which Southwest Gas has agreed to sell $22 million of shares of the Company’s common stock, $0.01 par value per share (“Common Stock”), to the Investors in a private placement (collectively, the “June 2025 Private Placement Shares”) of Common Stock at a price per share equal to the Follow-On Offering price per share (as defined in the June 2025 Private Placement Agreement), (ii) that certain registration rights letter agreement, dated as of May 19, 2025 (the “Letter Agreement”), by and among the Company and the Investors and (iii) that certain Common Stock Purchase Agreement (the “IPO Private Placement Agreement”), dated April 5, 2024, by and among the Company and

PERFORMANCE GUARANTY
Performance Guaranty • August 4th, 2026 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

This PERFORMANCE GUARANTY (as amended, supplemented or otherwise modified from time to time, this “Performance Guaranty”), dated as of May 4, 2026, is made by CENTURI HOLDINGS, INC., a Delaware corporation (the “Performance Guarantor”), in favor of PNC BANK, NATIONAL ASSOCIATION (“PNC”), as administrative agent under the Receivables Purchase Agreement defined below (in such capacity, the “Administrative Agent”), for the benefit of itself and the other Secured Parties under the Receivables Purchase Agreement defined below. Capitalized terms used, but not otherwise defined herein, shall have the respective meanings assigned thereto in, or by reference in, the Receivables Purchase Agreement defined below or if not defined therein, the respective meanings assigned thereto in the Transfer Agreement (as defined in the Receivables Purchase Agreement) and the other interpretive matters under Section 1.02 of the Receivables Purchase Agreement defined below shall apply, mutatis mutandis, to this

PERFORMANCE STOCK UNIT AWARD AGREEMENT UNDER THE CENTURI HOLDINGS, INC. OMNIBUS INCENTIVE PLAN
Performance Stock Unit Award Agreement • February 26th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

This Performance Stock Unit Award Agreement, together with Appendix A (this “Award Agreement”) is dated as of [●], by and between Centuri Holdings, Inc., a Delaware corporation (the “Company”), and [●] (the “Participant”), pursuant to the Centuri Holdings, Inc. Omnibus Incentive Plan (the “Plan”). Capitalized terms that are used, but not defined, in this Award Agreement, including Appendix A of this Award Agreement, shall have the meaning set forth in the Plan, and the Plan is incorporated by reference into this Award Agreement.

COMMON STOCK PURCHASE AGREEMENT
Common Stock Purchase Agreement • November 14th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York
FORM OF LONG-TERM INCENTIVE CASH AWARD AGREEMENT
Long-Term Incentive Cash Award Agreement • February 26th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

This Form of Long-Term Incentive Cash Award Agreement, together with Appendix A (collectively, this “Award Agreement”) is dated as of ________, _____, by and between Centuri Holdings, Inc., (the “Company” or “Centuri”) and _________ (the “Grantee”).

AWARD AGREEMENT FOR NON-EMPLOYEE DIRECTOR RESTRICTED STOCK UNITS
Award Agreement for Non-Employee Director Restricted Stock Units • August 4th, 2026 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

This Award Agreement for Non-Employee Director Restricted Stock Units (this “Award Agreement”) is dated as of [●], by and between Centuri Holdings, Inc., a Delaware corporation (the “Company”), and [●] (the “Participant”), pursuant to the Centuri Holdings, Inc. Omnibus Incentive Plan (the “Plan”). Capitalized terms that are used, but not defined, in this Award Agreement shall have the meaning set forth in the Plan, and the Plan is incorporated by reference into this Award Agreement.

Re: Centuri Holdings, Inc. (the “Company”) Registration Rights
Registration Rights Agreement • May 22nd, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

Reference is made to (i) that certain Common Stock Purchase Agreement, dated as of May 19, 2025 (the “Private Placement Agreement”), by and among Southwest Gas Holdings, Inc. (“Southwest Gas”) and Icahn Partners LP and Icahn Partners Master Fund LP (each, an “Investor” and collectively, the Investors”), pursuant to which Southwest Gas has agreed to sell $50 million of shares of the Company’s common stock, $0.01 par value per share (“Common Stock”), to the Investors in a private placement (collectively, the “2025 Private Placement Shares”) of Common Stock at a price per share equal to the Follow-On Offering price per share (as defined in the Private Placement Agreement), and (ii) that certain Common Stock Purchase Agreement (the “IPO Private Placement Agreement”), dated April 5, 2024, by and among the Company and the Icahn Partners LP and Icahn Partners Master Fund LP.

Centuri Holdings, Inc. 15,000,000 Shares of Common Stock Underwriting Agreement
Underwriting Agreement • August 11th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

Southwest Gas Holdings, Inc., a stockholder (the “Selling Stockholder”) of Centuri Holdings, Inc., a Delaware corporation (the “Company”), proposes to sell to the several underwriters listed in Schedule 1 hereto (the “Underwriters”), for whom you are acting as representative (the “Representative”), an aggregate of 15,000,000 shares of Common Stock, par value $0.01 per share (“Common Stock”), of the Company (the “Underwritten Shares”). In addition, the Selling Stockholder proposes to sell, at the option of the Underwriters, up to an additional 2,250,000 shares of Common Stock (the “Option Shares”). The Underwritten Shares and the Option Shares are herein referred to as the “Shares”. The shares of Common Stock of the Company to be outstanding after giving effect to the sale of the Shares are referred to herein as the “Stock”.

Centuri Holdings, Inc. 7,441,860 Shares of Common Stock Underwriting Agreement
Underwriting Agreement • November 14th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

Centuri Holdings, Inc., a Delaware corporation (the “Company”), proposes to issue and sell to the several underwriters listed in Schedule 1 hereto (the “Underwriters”), for whom you are acting as representatives (the “Representatives”), an aggregate of 7,441,860 shares of Common Stock, par value $0.01 per share (“Common Stock”), of the Company (the “Underwritten Shares”) and, at the option of the Underwriters, up to an additional 1,116,279 shares of Common Stock of the Company (the “Option Shares”). The Underwritten Shares and the Option Shares are herein referred to as the “Shares”. The shares of Common Stock of the Company to be outstanding after giving effect to the sale of the Shares are referred to herein as the “Stock.”

AWARD AGREEMENT FOR TIME-LAPSE RESTRICTED STOCK UNITS UNDER THE CENTURI HOLDINGS, INC. OMNIBUS INCENTIVE PLAN
Award Agreement for Time-Lapse Restricted Stock Units • April 8th, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

This Award Agreement for Time-Lapse Restricted Stock Units, together with Appendix A and Appendix B (this “Award Agreement”) is dated as of [•], by and between Centuri Holdings, Inc., a Delaware corporation (the “Company”), and [•] (the “Participant”), pursuant to the Centuri Holdings, Inc. Omnibus Incentive Plan (the “Plan”). Capitalized terms that are used, but not defined, in this Award Agreement, including Appendix A of this Award Agreement, shall have the meaning set forth in the Plan, and the Plan is incorporated by reference into this Award Agreement.

FOURTH AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT Dated as of March 22, 2024
Credit Agreement • March 22nd, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

This FOURTH AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT (this “Amendment”) is by and among CENTURI GROUP, INC., a Nevada corporation (the “Company”), and each Additional Borrower that becomes a party thereto in accordance with Section 5.17 thereto, as US Borrowers, CENTURI CANADA DIVISION INC., a corporation organized under the laws of the Province of Ontario, Canada, and each Additional Borrower that becomes a party thereto in accordance with Section 5.17 thereto, as Canadian Borrowers, the other Credit Parties party hereto, the lenders party hereto (the “Lenders”) and WELLS FARGO BANK, NATIONAL ASSOCIATION, as administrative agent for the Lenders (in such capacity, the “Administrative Agent”).

AWARD AGREEMENT FOR TIME-LAPSE RESTRICTED STOCK UNITS UNDER THE CENTURI HOLDINGS, INC. OMNIBUS INCENTIVE PLAN
Award Agreement for Time-Lapse Restricted Stock Units • February 26th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

This Award Agreement for Time-Lapse Restricted Stock Units, together with Appendix A (this “Award Agreement”) is dated as of [●], by and between Centuri Holdings, Inc., a Delaware corporation (the “Company”), and [●] (the “Participant”), pursuant to the Centuri Holdings, Inc. Omnibus Incentive Plan (the “Plan”). Capitalized terms that are used, but not defined, in this Award Agreement, including Appendix A of this Award Agreement, shall have the meaning set forth in the Plan, and the Plan is incorporated by reference into this Award Agreement.

PERFORMANCE STOCK UNIT AWARD AGREEMENT UNDER THE CENTURI HOLDINGS, INC. OMNIBUS INCENTIVE PLAN
Performance Stock Unit Award Agreement • April 8th, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

This Performance Stock Unit Award Agreement, together with Appendix A and Appendix B (this “Award Agreement”) is dated as of [●], by and between Centuri Holdings, Inc., a Delaware corporation (the “Company”), and [●] (the “Participant”), pursuant to the Centuri Holdings, Inc. Omnibus Incentive Plan (the “Plan”). Capitalized terms that are used, but not defined, in this Award Agreement, including Appendix A of this Award Agreement, shall have the meaning set forth in the Plan, and the Plan is incorporated by reference into this Award Agreement.

UNUTILIZED TAX ASSETS SETTLEMENT AGREEMENT
Unutilized Income Tax Assets Settlement Agreement • February 26th, 2025 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • Delaware

THIS UNUTILIZED INCOME TAX ASSETS SETTLEMENT AGREEMENT (this “Agreement”) is made as of February 24, 2025, by and between Southwest Gas Holdings, Inc., a Delaware corporation (and “Southwest Gas Holdings”), Centuri Holdings, Inc., a Delaware corporation (“Centuri Holdings”), and Centuri Group, Inc., a Nevada corporation and wholly owned subsidiary of Centuri Holdings (“Centuri Group” and, together with Centuri Holdings, the “Centuri Parties”). Southwest Gas Holdings and the Centuri Parties are each hereby referred to as a “Party” and, collectively (the “Parties”).

SECOND AMENDMENT TO SECOND AMENDED AND RESTATED CREDIT AGREEMENT Dated as of May 31, 2023
Credit Agreement • March 22nd, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • New York

SECOND AMENDED AND RESTATED CREDIT AGREEMENT, dated as of August 27, 2021, by and among CENTURI GROUP, INC., a Nevada corporation, and each Additional Borrower that becomes a party hereto in accordance with Section 5.17, as US Borrowers, CENTURI CANADA DIVISION INC., a corporation organized under the laws of the Province of Ontario, Canada, and each Additional Borrower that becomes a party hereto in accordance with Section 5.17, as Canadian Borrowers, the lenders who are party to this Agreement and the lenders who may become a party to this Agreement pursuant to the terms hereof, as Lenders, and WELLS FARGO BANK, NATIONAL ASSOCIATION, a national banking association, as Administrative Agent for the Lenders.

Execution Version REGISTRATION RIGHTS AGREEMENT BY AND BETWEEN CENTURI HOLDINGS, INC., AND SOUTHWEST GAS HOLDINGS, INC. DATED APRIL 11, 2024
Registration Rights Agreement • May 8th, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution • Delaware
CENTURI GROUP AWARD AGREEMENT UNDER THE CENTURI GROUP, INC. EXECUTIVE DEFERRED COMPENSATION PLAN AND THE CENTURI GROUP, INC. LONG-TERM INCENTIVE PLAN
Senior Management Ltip Award Agreement • March 22nd, 2024 • Centuri Holdings, Inc. • Natural gas transmisison & distribution

This Award Agreement (“Award Agreement”) is dated as of August 4, 2022, by and between Centuri Group, Inc., (the “Company” or “Centuri”), Southwest Gas Holdings, Inc. (“SWX”), and Gregory Izenstark (“Grantee”), pursuant to the Company’s Executive Deferred Compensation Plan (“EDCP”) and the Centuri Long-Term Incentive Plan (“LTIP”) (collectively, the “Plans” and individually a “Plan”). Capitalized terms that are used, but not defined, in this Award Agreement shall have the meaning set forth in the Plans, and the Plans are incorporated by reference into this Award Agreement.