Execution Version

HALLIBURTON COMPANY

HALLIBURTON OPERATIONS FINANCE COMPANY, LLC

TENTH SUPPLEMENTAL INDENTURE

(3.80% Senior Notes due November 2025)

(2.92% Senior Notes due March 2030)

(4.85% Senior Notes due November 2035)

(6.70% Senior Notes due September 2038)

(7.45% Senior Notes due September 2039)

(4.50% Senior Notes due November 2041)

(4.75% Senior Notes due August 2043)

(5.00% Senior Notes due November 2045)

(7.60% Senior Debentures due August 2096)

TENTH SUPPLEMENTAL INDENTURE (this “Tenth Supplemental Indenture”), dated

as of July 1, 2025, by and among Halliburton Company, a Delaware corporation (the “Company”),

Halliburton Operations Finance Company, LLC, a Texas limited liability company and a wholly

owned subsidiary of the Company (the “Finance Company”), and The Bank of New York Mellon

Trust Company, N.A. (as successor to JPMorgan Chase Bank), as trustee (the “Trustee”) under the

Indenture (as defined below).

W I T N E S S E T H

WHEREAS, the Company and Trustee have heretofore executed an Indenture dated as of

October 17, 2003 (the “Base Indenture”), as supplemented by (i) the Second Supplemental

Indenture dated December 15, 2003 relating to the 7.60% Senior Debentures due August 2096 of

the Company, (ii) the Fourth Supplemental Indenture dated September 12, 2008 relating to the

6.70% Senior Notes due September 2038 of the Company, (iii) the Fifth Supplemental Indenture

dated March 13, 2009 relating to the 7.45% Senior Notes due September 2039 of the Company,

(iv) the Sixth Supplemental Indenture dated November 14, 2011 relating to the 4.50% Senior Notes

due November 2041 of the Company, (v) the Seventh Supplemental Indenture dated August 5,

2013 relating to the 4.75% Senior Notes due August 2043 of the Company, (vi) the Eighth

Supplemental Indenture dated November 13, 2015 relating to the 3.80% Senior Notes due

November 2025 of the Company, the 4.85% Senior Notes due November 2035 of the Company

and the 5.00% Senior Notes due November 2045 of the Company and (vii) the Ninth Supplemental

Indenture dated March 3, 2020 relating to the 2.92% Senior Notes due March 2030 of the Company

(each of the foregoing series of notes of the Company, to the extent issued under the Indenture and

outstanding thereunder, together, the “Securities”). The Base Indenture, as supplemented by the

foregoing supplemental indentures listed herein and this Tenth Supplemental Indenture, is referred

to as the “Indenture”;

WHEREAS, the Company formed the Finance Company with the Secretary of State of the

State of Texas on May 21, 2025 and each of the Company and the Finance Company desire that

the Finance Company become a co-obligor with respect to all of the Company’s obligations

pursuant to the Securities and under the Indenture;

WHEREAS, Section 9.01(4) of the Base Indenture provides that the Company and the

Trustee may amend or supplement the Indenture or the Securities without the consent of any

Holder to, among other things, add additional obligors on any series of Securities; and

WHEREAS, all things necessary to make this Tenth Supplemental Indenture a valid and

legally binding agreement of the Company and the Finance Company have been heretofore

completed.

NOW THEREFORE, in consideration of the foregoing and for other good and valuable

consideration, the receipt of which is hereby acknowledged, the Company, the Finance Company

and the Trustee mutually agree to amend the Indenture as follows:

ARTICLE I

SECTION 1.01.CO-OBLIGOR OBLIGATION OF THE FINANCE COMPANY.

Effective as of the date hereof, the Finance Company hereby expressly assumes as a co-obligor

the due and punctual payment of the principal of and premium, if any, and interest on, all of the

Securities, and the due and punctual performance of all of the covenants and conditions of the

Indenture. The Finance Company, in addition to the Company, will be deemed to be the

“Company” for purposes of the Indenture, with the same effect as if the Finance Company and the

Company had each been named as the “Company” in the Indenture. Nothing herein shall be

construed to release the Company from any of its obligations under the Indenture or under the

Securities, including its obligation to pay the principal of and premium, if any, and interest on, the

Securities.

ARTICLE II

SECTION 2.01.  NOTICE. Any notice or communication provided or permitted by the

Indenture to be made upon, given or furnished to, or filed with, the Finance Company shall be

addressed as follows:

Halliburton Operations Finance Company, LLC

3000 North Sam Houston Parkway East

Houston, Texas 77032

Attention: (281) 871-4455

Facsimile No.: Chief Legal Officer

SECTION 2.02.RATIFICATION. Except as expressly amended and supplemented

by this Tenth Supplemental Indenture, the Indenture shall remain unchanged and in full force and

effect. This Tenth Supplemental Indenture shall be construed as supplemental to the Indenture and

shall form a part thereof.

SECTION 2.03.  GOVERNING LAW. This Tenth Supplemental Indenture shall be

governed and construed in accordance with the laws of the State of New York.

SECTION 2.04.  COUNTERPART ORIGINALS. The parties may sign any number

of copies of this Indenture. Each signed copy shall be deemed to be an original, but all of them

together represent the same agreement.

2

SECTION 2.05.  THE TRUSTEE. The recitals in this Tenth Supplemental Indenture

are made by the Company and the Finance Company only and not by the Trustee, and all of the

provisions contained in the Indenture in respect of the rights, privileges, immunities, powers and

duties of the Trustee shall be applicable in respect of this Tenth Supplemental Indenture as fully

and with like effect as if set forth herein in full. The Trustee makes no representation as to the

validity or adequacy of this Tenth Supplemental Indenture.

SECTION 2.06. CAPITALIZED TERMS. Capitalized terms used herein without

definition shall have the meanings assigned to them in the Indenture.

SECTION 2.07.  TRUST INDENTURE ACT CONTROLS. If any provision of this

Tenth Supplemental Indenture limits, qualifies or conflicts with the duties imposed by operation

of Section 318(c) of the Trust Indenture Act of 1939, as amended (15. U.S. Code §§ 77aaa-

77bbbb), the imposed duties shall control.

SECTION 2.08.  EFFECT OF HEADINGS. The Article and Section headings herein

have been inserted for convenience of reference only, are not to be considered a part hereof and

shall in no way modify or restrict any of the terms or provisions hereof.

SECTION 2.09.PROVISIONS FOR THE SOLE BENEFIT OF PARTIES AND

HOLDERS. Nothing in the Indenture, as supplemented, amended and modified by this Tenth

Supplemental Indenture, or in the Securities, expressed or implied, is intended or shall be construed

to confer upon, or to give or grant to, any person or entity, other than the Company, the Finance

Company, the Trustee, the Paying Agent and the registered owners of the Securities, any legal or

equitable right, remedy or claim under or by reason of the Indenture or any covenant, condition or

stipulation thereof, and all covenants, stipulations, promises and agreements in the Indenture

contained by or on behalf of the Company or the Finance Company shall be for the sole and

exclusive benefit of the Company, the Finance Company, the Trustee, the Paying Agent and the

registered owners of the Securities.

[Remainder of Page Intentionally Left Blank]

3

Docusign Envelope ID: 24793486-1434-49F6-A916-7AD7222DBBF7

IN WITNESS WHEREOF, the parties hereto have caused this Tenth Supplemental

Indenture to be duly executed as of the day and year first above written.

HALLIBURTON COMPANY

By:

Name: Timothy M. McKeon

Title: Senior Vice President and Treasurer

HALLIBURTONOPERATIONSFINANCE

COMPANY, LLC

By:

Name: Timothy M. McKeon

Title: Senior Vice President and Treasurer

[Signature Page to Tenth Supplemental Indenture]

THE  BANK  OF  NEW  YORK  MELLON  TRUST

COMPANY, N.A., as Trustee

By:

Name:

Title:

Marie A. Hattinger

Vice President

[Signature Page to Tenth Supplemental Indenture]