As filed with the Securities and Exchange Commission on February 11, 2020

Registration No. 333-                    

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form S-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

HALLIBURTON COMPANY

(Exact name of registrant as specified in its charter)

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Robb L. Voyles

Executive Vice President, Secretary and Chief Legal Officer

Halliburton Company

3000 North Sam Houston Parkway East

Houston, Texas 77032

(281) 871- 2699

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copy to:

David Emmons

Baker Botts L.L.P.

2001 Ross Avenue, Suite 900

Dallas, Texas 75201

(214) 953-6500

Approximate date of commencement of proposed sale to the public: From time to time on or after the effective date of this Registration Statement.

If the only securities being registered on this Form are to be offered pursuant to dividend or interest reinvestment plans, please check the following box.  ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, as amended (the “Securities Act”), other than securities offered only in connection with dividend or interest reinvestment plans, check the following box.  ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box.  ☒

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act (Check One).

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 7(a)(2)(B) of the Securities Act.  ☐

CALCULATION OF REGISTRATION FEE

PROSPECTUS

Halliburton Company

Common Stock

Preferred Stock

Debt Securities

Depositary Shares

Warrants

Subscription Rights

Purchase Contracts

Units

We may issue and sell from time to time securities described in this prospectus. This prospectus contains summaries of the general terms of the securities. At the time of each offering, we will provide the specific terms of the offering and the securities in supplements to this prospectus. You should read this prospectus and any prospectus supplement carefully before you invest. Our common stock is listed on the New York Stock Exchange under the symbol “HAL.”

Investing in our securities involves certain risks. You should carefully consider the “Risk Factors” section of the documents that are incorporated by reference herein and in the applicable prospectus supplement.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is February 11, 2020.

TABLE OF CONTENTS

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ABOUT THIS PROSPECTUS

This prospectus is part of a “shelf registration statement” that we have filed with the U.S. Securities and Exchange Commission (the “SEC”). By using a shelf registration statement, we may offer the securities described in this prospectus in one or more offerings. For further information about the securities and us, you should refer to our registration statement and its exhibits. The registration statement can be obtained from the SEC as described below under the heading “Where You Can Find More Information.”

This prospectus provides you with a general description of the securities we may offer. Each time we use this prospectus to offer securities, we will provide a prospectus supplement and, if applicable, a pricing supplement that will describe the specific terms of the offering and the securities being offered. A prospectus supplement and any pricing supplement may include or incorporate by reference a discussion of any risk factors or other special considerations applicable to the securities being offered or to us. The prospectus supplement and any pricing supplement may also add to, update or change the information contained in this prospectus and, accordingly, to the extent inconsistent, the information in this prospectus will be superseded by the information in the prospectus supplement or pricing supplement. Please carefully read this prospectus, the prospectus supplement and any pricing supplement, in addition to the information contained in the documents we refer to under the heading “Where You Can Find More Information.”

HALLIBURTON COMPANY

We are one of the world’s largest providers of products and services to the energy industry. We help our customers maximize value throughout the lifecycle of the reservoir – from locating hydrocarbons and managing geological data, to drilling and formation evaluation, well construction and completion, and optimizing production throughout the life of the asset. We report our results under two segments, the Completion and Production segment and the Drilling and Evaluation segment.

In this prospectus, we refer to Halliburton Company, its wholly owned and majority owned subsidiaries and its ownership interests in equity affiliates as “Halliburton,” “we,” “our” or “us,” unless we specifically state otherwise or the context indicates otherwise.

We are a Delaware corporation. The address of our principal executive offices and our telephone number at that location is:

Halliburton Company

3000 North Sam Houston Parkway East

Houston, Texas 77032

(281) 871-2699

Our website is www.halliburton.com. Information contained on or accessible from our website or any other website is not incorporated into this prospectus and does not constitute a part of this prospectus.

WHERE YOU CAN FIND MORE INFORMATION

Halliburton files annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC filings are available to the public over the internet at the SEC’s website at www.sec.gov and at our website at www.halliburton.com. Information on or accessible from our website or any other website is not incorporated by reference in this prospectus and does not constitute a part of this prospectus. You can also obtain information about Halliburton at the offices of the New York Stock Exchange, 20 Broad Street, New York, New York 10005.

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This prospectus is part of a registration statement we have filed with the SEC relating to the securities we may offer. As permitted by SEC rules, this prospectus does not contain all of the information we have included in the registration statement and the accompanying exhibits and schedules we file with the SEC. You may refer to the registration statement, exhibits and schedules for more information about us and the securities.

The SEC allows us to incorporate by reference the information we have filed with it into this prospectus, which means that we can disclose important information to you by referring you to those documents. The information we incorporate by reference is deemed to be part of this prospectus. Any statement in this prospectus or incorporated by reference into this prospectus shall be automatically modified or superseded for purposes of this prospectus to the extent that a statement contained herein or in a subsequently filed document that is incorporated by reference in this prospectus modifies or supersedes such prior statement. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this prospectus. You should not assume that the information in this prospectus is current as of any date other than the date on the front page of this prospectus.

We incorporate by reference the documents listed below (and any amendments to these documents) that Halliburton has previously filed with the SEC and any future filings Halliburton makes with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), (excluding any information furnished under Items 2.02 or 7.01 and exhibits related to such Items in any Current Report on Form 8-K) on or after the date of this prospectus and until the termination of this offering:

Each person, including any beneficial owner, to whom a copy of this prospectus has been delivered, may obtain copies of the documents we incorporate by reference by contacting us at the address indicated below. We will provide, without charge, upon written or oral request, a copy of any document incorporated by reference in this prospectus and any exhibit specifically incorporated by reference into such documents. Requests for copies of these documents should be directed to:

Halliburton Company

Investor Relations

3000 North Sam Houston Parkway East

Houston, Texas 77032

Telephone: (281) 871-2688

We have not authorized anyone to provide any information or to make any representations other than those contained in this prospectus or in any free writing prospectuses we have prepared. We take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. We are not making an offer of the securities in any jurisdiction where the offer is not permitted. You should assume that the information in this prospectus, the prospectus supplement and any pricing supplement is accurate only as of the date on its cover page and that any information we have incorporated by reference is accurate only as of the date of the document incorporated by reference.

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FORWARD-LOOKING INFORMATION

This prospectus, including the information we incorporate by reference, includes forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Exchange Act. Forward-looking information is based on projections and estimates, not historical information. You can identify our forward looking statements by the use of words like “may,” “may not,” “believes,” “do not believe,” “plans,” “estimates,” “intends,” “expects,” “do not expect,” “anticipates,” “do not anticipate,” “should,” “likely,” and other similar expressions that convey the uncertainty of future events or outcomes.

When considering these forward-looking statements, you should keep in mind the risk factors and other cautionary statements contained in this prospectus, any prospectus supplement and the documents we incorporate by reference.

Forward-looking information involves risk and uncertainties and reflects our best judgment based on current information. Our forward-looking statements are not guarantees of future performance, and we caution you not to rely unduly on them. We have based many of these forward-looking statements on expectations and assumptions about future events that may prove to be inaccurate. While our management considers these expectations and assumptions to be reasonable, they are inherently subject to significant business, economic, competitive, regulatory and other risks, contingencies and uncertainties, most of which are difficult to predict and many of which are beyond our control. In addition, other known and unknown risks and factors may affect the accuracy of our forward-looking information. Our forward-looking statements speak only as of the date of this prospectus or as of the date they are made, and, except as otherwise required by applicable securities laws, we undertake no obligation to publicly update any of our forward-looking statements regardless of whether factors change as a result of new information, future events or for any other reason.

USE OF PROCEEDS

Unless we inform you otherwise in the applicable prospectus supplement, we expect to use the net proceeds we receive from any offering under this prospectus for general corporate purposes, including, but not limited to, repayment or refinancing of debt, financing of acquisitions, working capital, capital expenditures and repurchases and redemptions of securities. Pending any specific application, we may initially invest funds in short-term marketable securities or apply them to the reduction of short-term indebtedness.

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DESCRIPTION OF CAPITAL STOCK

The following description of Halliburton’s common stock, preferred stock, certificate of incorporation and by-laws is a summary only and is subject to the complete text of Halliburton’s certificate of incorporation and by-laws, which have been filed with the SEC and which are incorporated by reference into this prospectus. You should read Halliburton’s certificate of incorporation and by-laws as currently in effect for more details regarding the provisions described below and for other provisions that may be important to you. This section also summarizes relevant provisions of the Delaware General Corporation Law (“DGCL”). The terms of the DGCL are more detailed than the general information provided below. Therefore, you should carefully consider the actual provisions of these laws.

Halliburton’s authorized capital stock consists of 2,000,000,000 shares of common stock, par value $2.50 per share, and 5,000,000 shares of preferred stock, without par value. As of February 7, 2020, there were 879,911,447 shares of common stock issued and outstanding. No shares of preferred stock are outstanding.

Common Stock

The holders of Halliburton common stock are entitled to one vote per share on all matters to be voted on by stockholders generally, including the election of directors. There are no cumulative voting rights, meaning that the holders of a majority of the shares voting for the election of directors can elect all of the candidates standing for election.

Halliburton’s common stock carries no preemptive or other subscription rights to purchase shares of Halliburton common stock and is not convertible, redeemable or assessable or entitled to the benefits of any sinking fund. Holders of Halliburton common stock will be entitled to receive such dividends as may from time to time be declared by Halliburton’s Board of Directors (the “Board”) out of funds legally available for the payment of dividends. If Halliburton issues preferred stock in the future, payment of dividends to holders of Halliburton common stock may be subject to the rights of holders of Halliburton preferred stock with respect to payment of preferential dividends, if any.

If Halliburton is liquidated, dissolved or wound up, the holders of Halliburton common stock will share pro rata in Halliburton’s assets after satisfaction of all of its liabilities and the prior rights of any outstanding class of preferred stock.

Halliburton common stock is listed on the New York Stock Exchange under the symbol “HAL.” Any additional common stock that Halliburton will issue will also be listed on the New York Stock Exchange.

Preferred Stock

The Board has the authority, without stockholder approval, to issue shares of preferred stock in one or more series and to fix the number of shares and terms of each series. The Board may determine the designation and other terms of each series, including, among others:

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The issuance of preferred stock, while providing desired flexibility in connection with possible acquisitions and other corporate purposes, could adversely affect the voting power of holders of Halliburton common stock. It also could affect the likelihood that holders of Halliburton common stock will receive dividend payments and payments upon liquidation. Shares of preferred stock may be offered either separately or represented by depositary shares.

Anti-Takeover Provisions

Some provisions of Delaware law, Halliburton’s certificate of incorporation and by-laws summarized below could make certain change of control transactions more difficult, including acquisitions of Halliburton by means of a tender offer, proxy contest or otherwise, as well as removal of Halliburton’s incumbent directors. These provisions may have the effect of preventing changes in Halliburton’s management. It is possible that these provisions would make it more difficult to accomplish or deter transactions that a stockholder might consider in his or her best interest, including those attempts that might result in a premium over the market price for the common stock.

Business Combinations Under Delaware Law

Halliburton is a Delaware corporation and is subject to Section 203 of the DGCL. Generally, Section 203 prevents (i) a person who owns 15% or more of Halliburton’s outstanding voting stock (an “interested stockholder”), (ii) an affiliate or associate of Halliburton who was also an interested stockholder at any time within three years immediately prior to the date of determination and (iii) the affiliates and associates of any such persons from engaging in any business combination with Halliburton, including mergers or consolidations or acquisitions of additional shares, for three years following the date that the person became an interested stockholder. These restrictions do not apply if:

Number and Election of Directors

Halliburton’s by-laws provide that the number of directors shall not be less than 8 nor more than 20, with the number of directors to be fixed from time to time by or in the manner provided in the by-laws. Halliburton’s by-laws provide that the number of directors shall be fixed by resolution of the Board or by the stockholders at the annual meeting, and that in the event of a vacancy or newly created directorship, the remaining directors have the sole power to fill any such vacancies.

Limitation of Stockholder Actions

Any Halliburton stockholder wishing to submit a nomination to the Board must follow certain procedures contained in Halliburton’s by-laws. In addition, Halliburton’s by-laws require written application by a holder of at least 10% of the outstanding Halliburton voting stock or two or more holders owning in the aggregate at least 25% of the outstanding Halliburton voting stock to call a special meeting of the Halliburton stockholders. Generally, a notice of a stockholder proposal or nomination of a director candidate is timely if it is received not less than 90 days nor more than 120 days prior to the first anniversary of the immediately preceding annual

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meeting. Halliburton’s by-laws specify the requirements as to form and content of all stockholders’ notices. These requirements may preclude stockholders from bringing matters before the stockholders at an annual or special meeting to the extent they do not comply with the requirements in these advance notice procedures.

Authorized but Unissued Shares

Halliburton’s certificate of incorporation provides that the authorized but unissued shares of preferred stock are available for future issuance without stockholder approval and does not preclude the future issuance without stockholder approval of the authorized but unissued shares of Halliburton’s common stock. These additional shares may be utilized for a variety of corporate purposes, including future public offerings to raise additional capital, corporate acquisitions and employee benefit plans. The existence of authorized but unissued shares of common stock and preferred stock could make it more difficult or discourage an attempt to obtain control of Halliburton by means of a proxy contest, tender offer, merger or otherwise.

Amendments to Halliburton’s By-laws

Halliburton’s by-laws may be amended or repealed or new by-laws may be adopted (i) by the affirmative vote of the majority of the Board or (ii) at any annual or special meeting of the stockholders where a quorum is present by the affirmative vote of the majority of the stockholders entitled to vote at such meeting.

Limitation of Director Liability and Indemnification Arrangements

Halliburton’s by-laws contain provisions that provide for indemnification of officers and directors to the fullest extent permitted by, and in the manner permissible under, the DGCL, which empowers a Delaware corporation to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that such person is or was a director, officer, employee or agent of such corporation or is or was serving at the request of such corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise. The indemnity may include expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with such action, suit or proceeding, provided that such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe such person’s conduct was unlawful.

As permitted by the DGCL, Halliburton’s certificate of incorporation contains a provision eliminating the personal liability of Halliburton’s directors to Halliburton or Halliburton’s stockholders for monetary damages for breach of fiduciary duty as a director, subject to certain exceptions. Halliburton’s limitation of liability and indemnification provisions may discourage stockholders from bringing a lawsuit against directors or officers for breach of their fiduciary duty. These provisions may also have the effect of reducing the likelihood of derivative litigation against directors or officers, even though such an action, if successful, might otherwise benefit Halliburton and stockholders of Halliburton.

Transfer Agent and Registrar

The transfer agent and registrar for Halliburton common stock is Computershare Shareowner Services LLC.

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DESCRIPTION OF THE DEBT SECURITIES

We plan to issue the debt securities under an indenture dated as of October 17, 2003 between us and The Bank of New York Mellon Trust Company, N.A. (as successor to JPMorgan Chase Bank), as trustee (the “indenture”). The terms of the debt securities include those stated in the indenture and those made part of the indenture by reference to the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”).

The debt securities to be issued will be our general unsecured obligations and will rank equally with all of our unsecured and unsubordinated debt.

We have summarized the provisions of the indenture below. You should read the indenture for more details regarding the provisions described below and for other provisions that may be important to you. We have filed the indenture with the SEC as an exhibit to the registration statement, and we will include any other instrument establishing the terms of any debt securities we offer as exhibits to a filing we will make with the SEC in connection with that offering. See “Where You Can Find More Information.”

The definitions of capitalized terms used in this section without definition are set forth below under “— Definitions.” In this description, the word “Halliburton,” “we,” “our” or “us” means only Halliburton Company and not any of its subsidiaries or other affiliates.

General

The indenture does not contain any financial covenants. In addition, we are not restricted under the indenture from paying dividends, making investments or issuing or repurchasing our securities. The indenture will not restrict our ability to incur additional indebtedness in the future, other than certain secured indebtedness as described below.

Other than the restrictions contained in the indenture on liens and sale/leaseback transactions described below under “— Covenants,” the indenture does not contain any covenants or other provisions designed to protect holders of the debt securities in the event we participate in a highly leveraged transaction or upon a change of control. The indenture also does not contain provisions that give holders the right to require us to repurchase their securities in the event of a decline in our credit ratings for any reason, including as a result of a takeover, recapitalization or similar restructuring or otherwise.

We may issue the debt securities of any series in definitive form or as a book-entry security in the form of a global security registered in the name of a depositary we designate.

We may issue the debt securities in one or more series with various maturities. They may be sold at par, at a premium or with a discount, which may be substantial, below their stated principal amount. These debt securities may bear no interest or interest at a rate that at the time of issuance is below market rates. If we sell these types of debt securities, we will describe in the prospectus supplement any material United States federal income tax consequences and other special considerations relating to that series of debt securities.

Terms

The prospectus supplement relating to any series of debt securities being offered will include specific terms relating to the offering. These terms will include some or all of the following:

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We may sell the debt securities at a discount, which may be substantial, below their stated principal amount. The debt securities may bear no interest or interest at a rate that at the time of issuance is below market rates. If we sell the debt securities, we will describe in the prospectus supplement any material United States federal income tax consequences and other special considerations.

If we sell any debt securities for any foreign currency or currency unit or if payments on any debt securities are payable in any foreign currency or currency unit, we will describe in the prospectus supplement the restrictions, elections, tax consequences, specific terms and other information relating to those debt securities and the foreign currency or currency unit.

Covenants

Under the indenture, there are no covenants restricting our ability to incur additional debt (other than certain secured indebtedness as described below), pay dividends, make investments, issue or repurchase our securities, maintain any asset or other ratios or create or maintain any reserves. However, the indenture does contain other covenants for your protection, including those described below.

We are required to deliver to the trustee, within 120 days after the end of each fiscal year, a statement signed by an officer complying with the applicable provisions of the Trust Indenture Act and stating that we have complied with every covenant contained in the indenture and are not in default in the performance or observance of any terms of the indenture.

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The covenants summarized below will apply to the debt securities (unless waived or amended) as long as the debt securities are outstanding.

Restrictions on Secured Debt

Except as provided below, we will not, and will not cause, suffer or permit any of our Restricted Subsidiaries to, create, incur or assume any Secured Debt without equally and ratably securing the debt securities. In that circumstance, we must also equally and ratably secure any of our other indebtedness or any indebtedness of such Restricted Subsidiary then similarly entitled for so long as such other indebtedness is secured. However, the foregoing restrictions will not apply to:

We and any Restricted Subsidiaries may create, incur or assume Secured Debt not otherwise permitted or excepted without equally and ratably securing the debt securities if the sum of:

does not at the time exceed 5% of Consolidated Net Tangible Assets.

Limitations on Sale and Leaseback Transactions

The indenture prohibits Sale and Leaseback Transactions unless:

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Provided, however, that the amount to be so applied to the retirement of such indebtedness shall be reduced by:

Unless a Principal Property is designated as such by our Board, the limitation on Sale and Leaseback Transactions will not limit or prohibit any Sale and Leaseback Transactions by Halliburton or a Restricted Subsidiary.

Restrictions on Consolidation, Merger, Sale or Conveyance

Halliburton will not, in any transaction or series of transactions, consolidate with or merge with or into, or sell, convey, transfer, lease or otherwise dispose of all or substantially all its assets to, any person, unless:

For purposes of this covenant, the sale, lease, conveyance, assignment, transfer or other disposition of all or substantially all of the properties and assets of one or more subsidiaries of Halliburton, which properties and assets, if held by Halliburton instead of such subsidiaries, would constitute all or substantially all of the properties and assets of Halliburton on a consolidated basis, shall be deemed to be the transfer of all or substantially all of the properties and assets of Halliburton.

The successor company will succeed to, and be substituted for, and may exercise every right and power of, Halliburton under the indenture. In the case of a sale, conveyance, transfer or other disposition (other than a lease) of all or substantially all its assets, Halliburton will be released from all of the obligations under the indenture and the debt securities.

If any Principal Property becomes subject to any mortgage, security interest, pledge, lien or encumbrance not permitted under “— Restrictions on Secured Debt” upon any such consolidation with or merger with or into, or upon any such sale, conveyance, or lease or upon the acquisition by us of the properties of another corporation, the principal and interest payments on the debt securities will be secured by a direct lien on such Principal Property.

Although there is a limited body of case law interpreting the phrase “substantially all,” there is no precise established definition of the phrase under applicable law. Accordingly, in certain circumstances there may be a degree of uncertainty as to whether a particular transaction would involve “all or substantially all” of the property or assets of a person.

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Events of Default

The following are events of default under the indenture:

A default under one series of debt securities will not necessarily be a default under any other series of debt securities issued under the indenture.

If any event of default occurs for any series of debt securities and continues for the required amount of time, the trustee or the holders of not less than 25% of the principal amount of the then-outstanding debt securities of that series (or, if the event of default is due to the breach or failure to perform certain covenants or agreements in the indenture, 25% in principal amount of all debt securities issued under the indenture and any supplement thereto that are affected, voting as one class) may declare the debt securities of that series due and payable, together with all accrued and unpaid interest, if any, immediately by giving notice in writing to us (and to the trustee, if given by the holders). Notwithstanding the preceding, in the case of an event of default arising from certain events of bankruptcy, insolvency or reorganization with respect to Halliburton, all outstanding debt securities of that series will become due and payable without further action or notice. The holders of a majority in principal amount of the then outstanding debt securities of that series (or, if the event of default is due to the breach or failure to perform certain covenants or agreements in the indenture, of all securities issued under the indenture and any supplement thereto that are affected, voting as one class), may rescind the declaration under circumstances specified in the indenture.

No holder of a debt security then outstanding may institute any suit, action or proceeding with respect to, or otherwise attempt to enforce, the indenture, unless:

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The right of each holder of a debt security to receive payment of the principal of, premium, if any, or interest on a debt security on or after the respective due dates and the right to institute suit for enforcement of any payment obligation may not be impaired or affected without the consent of that holder.

The holders of a majority in aggregate principal amount of the then-outstanding debt securities of a series that are affected, voting as a class (or, in some cases, all the then-outstanding debt securities issued under the indenture and any supplement thereto that are affected, voting as a class), may direct the time, method and place of conducting any proceeding for any remedy available to the trustee or exercising any trust power conferred on the trustee if that direction is not in conflict with applicable law and would not involve the trustee in personal liability.

Satisfaction and Discharge

The indenture provides that the trustee will execute proper instruments acknowledging the satisfaction and discharge of the indenture with respect to debt securities of any series when:

In the case of satisfaction and discharge of debt securities not delivered to the trustee for cancellation, we must (1) deposit funds, government securities or a combination thereof with the trustee sufficient to make payments on the series of debt securities on the dates those payments are due and payable or (2) fulfill such other means of satisfaction and discharge specified in the supplemental indenture to such series of debt securities.

We must also pay all other sums due under the indenture and provide an officers’ certificate and an opinion of counsel as described in the indenture.

Defeasance

When we use the term defeasance, we mean discharge from some or all of our obligations under the indenture. If, among other things, funds or government securities (or any combination thereof) are deposited with the trustee sufficient to make payments on the debt securities of any series on the dates those payments are due and payable, then, at our option, either of the following will occur:

If the debt securities of any series are defeased, the holders of the debt securities of that series will not be entitled to the benefits of the indenture, except for obligations to register the transfer or exchange of debt securities of that series, replace stolen, lost or mutilated debt securities of that series or maintain paying agencies and hold moneys for payment in trust. In the case of covenant defeasance, our obligation to pay principal, premium and interest on the debt securities of that series will also survive. Defeasance will not release us from certain of our obligations to the Trustee.

We will be required to deliver to the trustee an opinion of counsel or a tax ruling that the deposit and related defeasance would not cause the holders of the debt securities of any affected series to recognize income, gain or

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loss for U.S. federal income tax purposes and that holders will be subject to federal income tax on the same amount and in the same manner and at the same times as would have been the case if such defeasance had not occurred. If we elect legal defeasance, that opinion of counsel must be based upon a ruling from the U.S. Internal Revenue Service or a change in law to that effect. We will also be required to provide the Trustee additional documents as described in the indenture.

Modifications

We and the trustee may amend or supplement the indenture if holders of a majority in principal amount of all then outstanding series of debt securities issued under the indenture and any supplement thereto that are affected by the amendment or supplement (acting as one class) consent to it. Without the consent of each holder of a debt security, however, no modification may:

From time to time, we and the trustee may enter into supplemental indentures without the consent of the holders of any debt security to, among other things:

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We will be required to provide the Trustee with an opinion of counsel and an officers’ certificate prior to the execution of any amendment or supplement to the indenture.

Governing Law

The indenture is and the debt securities will be governed by, and construed in accordance with, the laws of the State of New York.

Definitions

“Consolidated Net Tangible Assets” means the aggregate amount of assets included on a consolidated balance sheet of Halliburton and its Restricted Subsidiaries, less:

all in accordance with generally accepted accounting principles consistently applied.

“Principal Property” means any real property, manufacturing plant, warehouse, office building or other physical facility, or any item of marine, transportation or construction equipment or other like depreciable assets of Halliburton or of any Restricted Subsidiary, whether owned at or acquired after the date of the indenture, other than any pollution control facility, that in the opinion of our Board is of material importance to the total business conducted by us and our Restricted Subsidiaries as a whole.

“Restricted Subsidiary” means:

provided, however, we may not designate any Subsidiary as a Restricted Subsidiary if such designation would cause us to breach any covenant or agreement in the indenture, assuming that any Secured Debt of such Subsidiary was incurred at the time of such designation and that any Sale and Leaseback Transaction to which the Subsidiary is then a party was entered into at the time of such designation.

“Sale and Leaseback Transaction” means the sale or transfer by Halliburton or a Restricted Subsidiary (other than to Halliburton or any one or more of its Restricted Subsidiaries, or both) of any Principal Property owned by it that has been in full operation for more than 120 days prior to the sale or transfer with the intention of taking back a lease on such property, other than a lease not exceeding 36 months, and where the use by Halliburton or the Restricted Subsidiary of the property will be discontinued on or before the expiration of the term of the lease.

“Secured Debt” means indebtedness (other than indebtedness among Halliburton and Restricted Subsidiaries) for money borrowed by Halliburton or a Restricted Subsidiary, or any other indebtedness of Halliburton or a Restricted Subsidiary on which interest is paid or payable, which in any case is secured by:

14

“Subsidiary” of any person means (a) any corporation, association or other business entity (other than a partnership, joint venture, limited liability company or similar entity) of which more than 50% of the total ordinary voting power of shares of Capital Stock entitled (without regard to the occurrence of any contingency) to vote in the election of directors, managers or trustees thereof (or persons performing similar functions) or (b) any partnership, joint venture, limited liability company or similar entity of which more than 50% of the capital accounts, distribution rights, total equity and voting interests or general or limited partnership interests, as applicable, is, in the case of clauses (a) and (b), at the time owned or controlled, directly or indirectly, by (1) such person, (2) such person and one or more Subsidiaries of such person or (3) one or more Subsidiaries of such person. Unless otherwise specified herein, each reference to a Subsidiary will refer to a Subsidiary of Halliburton. As used herein, “Capital Stock” of any person means any and all shares (including ordinary shares or American Depositary Shares), interests, rights to purchase, warrants, options, participations or other equivalents of or interests in (however designated) of capital stock or other equity participations of such person and any rights (other than debt securities convertible or exchangeable into an equity interest), warrants or options to acquire an equity interest in such person.

15

DESCRIPTION OF THE DEPOSITARY SHARES

We may issue shares of preferred stock either separately or represented by depositary shares. We may also, at our option, elect to offer fractional shares of preferred stock. If we exercise this option, we will issue receipts for depositary shares, each of which will represent a fraction of a share of a particular series of preferred stock, to be described in an applicable prospectus supplement.

The shares represented by depositary shares will be deposited under a deposit agreement between us and a bank or trust company selected by us and having its principal office in the United States and having a combined capital and surplus of at least $50,000,000. Subject to the terms of the deposit agreement, each owner of a depositary share will be entitled, in proportion to the applicable share or fraction thereof represented by the depositary share, to all of the rights and preferences, if any, of the share represented thereby, including any dividend, voting, redemption, conversion and liquidation rights. The depositary shares will be evidenced by depositary receipts issued pursuant to the deposit agreement.

The prospectus supplement relating to any depositary shares being offered will include specific terms relating to the offering, including a discussion of certain United States federal income tax consequences.

We will include a copy of the form of deposit agreement, including the form of depositary receipt, and any other instrument establishing the terms of any depositary shares we offer as exhibits to a filing we will make with the SEC in connection with that offering. See “Where You Can Find More Information.”

16

DESCRIPTION OF THE WARRANTS

We may issue warrants to purchase common stock, preferred stock, debt securities, depositary shares, purchase contracts or other securities described in this prospectus or any combination of the foregoing. Warrants may be issued independently or together with any other securities and may be attached to or separate from the other securities. Each series of warrants will be issued under a separate warrant agreement to be entered into between us and a warrant agent we will name in a prospectus supplement. The warrant agent will act solely as our agent in connection with the warrants and will not assume any obligation or relationship of agency or trust for or with any holders or beneficial owners of warrants.

The prospectus supplement relating to any warrants being offered will include specific terms relating to the offering. We will file the form of any warrant agreement as an exhibit to a filing we will make with the SEC in connection with that offering. See “Where You Can Find More Information.” The prospectus supplement will include some or all of the following terms:

17

DESCRIPTION OF THE SUBSCRIPTION RIGHTS

We may issue subscription rights to purchase common stock, preferred stock, debt securities, depositary shares or other securities described in this prospectus. These subscription rights may be issued independently or together with any other security described in this prospectus and may or may not be transferable by the stockholder purchasing or receiving the subscription rights in such offering. In connection with any offering of subscription rights, we may enter into a standby arrangement with one or more underwriters or other purchasers pursuant to which the underwriters or other purchasers may be required to purchase any securities remaining unsubscribed for after such offering. In connection with a subscription rights offering to our stockholders, we will distribute certificates evidencing the subscription rights and a prospectus supplement to our stockholders on the record date that we set for receiving subscription rights in such subscription rights offering.

The prospectus supplement relating to any subscription rights being offered will include specific terms relating to the offering. These terms will include some or all of the following:

Each subscription right will entitle the holder of the subscription right to purchase for cash such amount of common stock, preferred stock, debt securities, depositary shares or other securities, at such exercise price as shall in each case be set forth in, or be determinable as set forth in, the prospectus supplement relating to the subscription rights offered thereby. Subscription rights may be exercised at any time up to the close of business on the expiration date for such subscription rights set forth in the prospectus supplement. After the close of business on the expiration date, all unexercised subscription rights will become void.

Subscription rights may be exercised as set forth in the prospectus supplement relating to the subscription rights offered thereby. Upon receipt of payment and the subscription rights certificate properly completed and duly executed at the corporate trust office of the subscription rights agent or any other office indicated in the prospectus supplement, we will forward, as soon as practicable, the shares of common stock, preferred stock, debt securities or other securities purchasable upon such exercise. We may determine to offer any unsubscribed offered securities directly to persons other than stockholders, to or through agents, underwriters or dealers or through a combination of such methods, including pursuant to standby underwriting arrangements, as set forth in the prospectus supplement.

18

DESCRIPTION OF THE PURCHASE CONTRACTS

We may issue purchase contracts representing contracts obligating holders, subject to the terms of such purchase contracts, to purchase from us, and for us to sell to the holders thereof, a specified or varying number of our common stock, preferred stock or other securities described in this prospectus at a future date or dates. Alternatively, the purchase contracts may, subject to the terms of such purchase contracts, obligate us to purchase from holders, and obligate holders to sell to us, a specified or varying number of shares of common stock, preferred stock or other securities described in this prospectus. The price per unit of our common stock, preferred stock or other securities described in this prospectus, and number of units, may be fixed at the time the purchase contracts are entered into or may be determined by reference to a specific formula set forth in the purchase contracts.

The prospectus supplement relating to any purchase contracts being offered will include specific terms relating to the offering. The purchase contracts will be issued pursuant to documents to be issued by us. We will include a copy of the documents establishing the terms of any purchase contract we offer as exhibits to a filing we will make with the SEC in connection with that offering. See “Where You Can Find More Information.”

19

DESCRIPTION OF THE UNITS

We may issue units of securities consisting of one or more of the following securities: common stock, preferred stock, debt securities, warrants, depositary shares, subscription rights, purchase contracts or any combination thereof. We may evidence each series of units issued by unit certificates that we will issue under a separate agreement. We may enter into unit agreements with a unit agent. Each unit agent will be a bank or trust company that we select. We will include a copy of the documents establishing the terms of any units we offer as exhibits to a filing we will make with the SEC in connection with that offering. See “Where You Can Find More Information.”

The prospectus supplement relating to any units being offered will include specific terms relating to the offering. These terms will include some or all of the following:

20

PLAN OF DISTRIBUTION

We may sell the securities in and outside the United States through underwriters or dealers, directly to purchasers or through agents.

Sale Through Underwriters or Dealers

If we use underwriters in the sale of the securities, the underwriters will acquire the securities for their own account. The underwriters may resell the securities from time to time in one or more transactions, including negotiated transactions, at a fixed public offering price or at varying prices determined at the time of sale. Underwriters may offer the securities to the public either through underwriting syndicates represented by one or more managing underwriters or directly by one or more firms acting as underwriters. Unless we inform you otherwise in the prospectus supplement, the obligations of the underwriters to purchase the securities will be subject to conditions, and the underwriters will be obligated to purchase all of the offered securities if they purchase any of them. The underwriters may change from time to time any initial public offering price and any discounts or concessions allowed or reallowed or paid to dealers.

During and after an offering through underwriters, the underwriters may purchase and sell the securities in the open market. These transactions may include overallotment and stabilizing transactions and purchases to cover syndicate short positions created in connection with the offering. The underwriters may also impose a penalty bid, whereby selling concessions allowed to syndicate members or other broker-dealers for the offered securities sold for their account may be reclaimed by the syndicate if such offered securities are repurchased by the syndicate in stabilizing or covering transactions. These activities may stabilize, maintain or otherwise affect the market price of the offered securities, which may be higher than the price that might otherwise prevail in the open market. If commenced, these activities may be discontinued at any time.

If we use dealers in the sale of the securities, we will sell such securities to them as principals. They may then resell those securities to the public at varying prices determined by the dealers at the time of resale. The dealers participating in any sale of the securities may be deemed to be underwriters within the meaning of the Securities Act with respect to any sale of those securities. We will include in the prospectus supplement the names of the dealers and the terms of the transaction.

Rights Offerings

We may offer rights to our existing stockholders to purchase additional shares of our common stock, preferred stock, debt securities, depositary shares or other securities. For any particular subscription rights, the applicable prospectus supplement will describe the terms of such rights, including the period during which such rights may be exercised, the manner of exercising such rights, the transferability of such rights and the number of shares of common stock, preferred stock, debt securities, depositary shares or other securities that may be purchased in connection with each right and the subscription price for the purchase of such shares. In connection with a rights offering, we may enter into a standby arrangement with one or more underwriters or other purchasers to purchase any of our shares of common stock, preferred stock, debt securities, depositary shares or other securities not subscribed for in the rights offering by existing stockholders, which will be described in the applicable prospectus supplement.

Direct Sales and Sales Through Agents

We may sell the securities directly. In that event, no underwriters or agents would be involved. We may also sell the securities through agents we designate from time to time. In the prospectus supplement, we will name any agent involved in the offer or sale of the securities, and we will describe any commissions payable by us to the agent. Unless we inform you otherwise in the prospectus supplement, any agent will agree to use its reasonable best efforts to solicit purchases for the period of its appointment.

21

We may sell the securities directly to institutional investors or others who may be deemed to be underwriters within the meaning of the Securities Act with respect to any sale of those securities. We will describe the terms of any such sales in the prospectus supplement.

Delayed Delivery Contracts

If we so indicate in the prospectus supplement, we may authorize agents, underwriters or dealers to solicit offers from certain types of institutions to purchase the securities from us at the public offering price under delayed delivery contracts. These contracts would provide for payment and delivery on a specified date in the future. The contracts would be subject only to those conditions described in the prospectus supplement. The prospectus supplement will describe the commission payable for solicitation of those contracts.

General Information

We may have agreements with the agents, dealers and underwriters to indemnify them against certain civil liabilities, including liabilities under the Securities Act, or to contribute with respect to payments that the agents, dealers or underwriters may be required to make. Agents, dealers and underwriters may engage in transactions with us or perform services for us in the ordinary course of their businesses.

LEGAL MATTERS

The validity of the offered securities and other matters in connection with any offering of the securities will be passed upon for us by Baker Botts L.L.P., Dallas, Texas and Houston, Texas. If the securities are being distributed through underwriters or agents, the underwriters or agents will be advised about legal matters relating to any offering by their own legal counsel, which will be named in the related prospectus supplement.

EXPERTS

The consolidated financial statements of Halliburton Company as of December 31, 2019 and 2018, and for each of the years in the three-year period ended December 31, 2019, and management’s assessment of the effectiveness of internal control over financial reporting as of December 31, 2019 have been incorporated by reference herein in reliance upon the reports of KPMG LLP, independent registered public accounting firm, incorporated by reference herein, and upon the authority of said firm as experts in accounting and auditing. The audit report covering the December 31, 2019 consolidated financial statements refers to a change in accounting for leases.

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PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

The following table sets forth expenses payable by Halliburton in connection with the issuance and distribution of the securities being registered.

The discussion below summarizes the material indemnification provisions of Halliburton’s restated certificate of incorporation and by-laws and Section 145 of the General Corporation Law of the State of Delaware (the “DGCL”).

Section 145 of the DGCL provides that a Delaware corporation has the power, under specified circumstances, to indemnify its directors, officers, employees, and agents or persons who are or were serving at the request of the corporation as directors, officers, employees or agents of another entity. Indemnification is allowed in connection with threatened, pending, or completed actions, suits, or proceedings, whether civil, criminal, administrative or investigative, other than an action by or in right of the corporation, brought against them by reason of the fact that they were or are directors, officers, employees, or agents, for expenses, judgments and fines, and amounts paid in settlement actually and reasonably incurred in any action, suit, or proceeding if: (1) he or she acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the corporation and (2) with respect to any criminal proceeding, he or she had no reasonable cause to believe that his or her conduct was unlawful. The termination of any action, suit or proceeding by judgment, order, settlement, conviction, or upon a plea of nolo contendere or its equivalent, shall not, of itself, create a presumption that a person did not act in good faith and in a manner which he or she reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal proceeding, had reasonable cause to believe that his or her conduct was unlawful.

Article X of Halliburton’s restated certificate of incorporation together with Section 36 of its by-laws provide for mandatory indemnification of each person who is or was made a party to or involved in any actual or threatened civil, criminal, administrative, or investigative action, suit, or proceeding because:

PART II-1

Section 36 of Halliburton’s by-laws and Article X of its restated certificate of incorporation expressly provide that they are not the exclusive methods of indemnification.

Section 145 of the DGCL provides that a Delaware corporation has the power to purchase and maintain insurance on behalf of its directors, officers, employees or agents against liabilities asserted against such person in his or her capacity or arising out of his or her status as a director, officer, employee or agent of the company. A Delaware corporation has this power whether or not the corporation has the power to indemnify such person against the liability under Section 145 of the DGCL.

Section 36 of the by-laws provides that Halliburton may maintain insurance, at its own expense, to protect itself and any director or officer of Halliburton or of another entity against any expense, liability, or loss. This insurance coverage may be maintained regardless of whether Halliburton would have the power to indemnify the person against the expense, liability, or loss under the DGCL.

Section 102(b)(7) of the DGCL provides that a certificate of incorporation may contain a provision eliminating or limiting the personal liability of a director to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director. However, that provision shall not eliminate or limit the liability of a director:

Article XV of Halliburton’s restated certificate of incorporation contains this type of provision.

The foregoing statements are subject to the detailed provisions of Sections 145 and 102 of the DGCL and Halliburton’s restated certificate of incorporation and by-laws.

PART II-2

provided, however, that paragraphs (a)(1)(i), (a)(1)(ii) and (a)(1)(iii) of this section do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the Commission by a Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act, that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

PART II-3

PART II-4

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Houston, State of Texas, on February 11, 2020.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities indicated on February 11, 2020.

Signatures to Form S-3

Signatures to Form S-3

EXHIBIT 5.1

		910 LOUISIANA		AUSTIN		LONDON
		HOUSTON, TEXAS		BEIJING		MOSCOW
		77002-4995		BRUSSELS		NEW YORK
				DALLAS		PALO ALTO
		TEL +1 713.229.1234		DUBAI		SAN FRANCISCO
		FAX +1 713.229.1522		HONG KONG		RIYADH
		BakerBotts.com		HOUSTON		WASHINGTON

February 11, 2020

Halliburton Company

3000 North Sam Houston Parkway East

Houston, TX 77032

Ladies and Gentlemen:

We have acted as counsel to Halliburton Company, a Delaware corporation (the “Company”), with respect to certain legal matters in connection with the registration statement on Form S–3 (the “Registration Statement”) to be filed by the Company with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Securities Act”), registering securities to be issued and sold from time to time pursuant to Rule 415 of the Securities Act. Such securities include: (a) shares of common stock, par value $2.50 per share, of the Company (“Common Stock”), (b) shares of preferred stock, without par value, of the Company (“Preferred Stock”), (c) debt securities of the Company (“Debt Securities”), which may be issued in one or more series, consisting of notes, debentures or other evidences of indebtedness, (d) depositary shares of the Company representing Preferred Stock (the “Depositary Shares”), (e) warrants for the purchase of Common Stock, Preferred Stock, Debt Securities, Depositary Shares, Purchase Contracts (as defined below), other securities of the Company or any combination thereof (the “Warrants”), (f) rights to purchase Common Stock, Preferred Stock, Debt Securities or other securities of the Company (the “Rights”), (g) purchase contracts to purchase from or sell to the Company shares of Common Stock, Preferred Stock or other securities of the Company (the “Purchase Contracts”) and (h) units consisting of any combination of the Common Stock, Preferred Stock, Debt Securities, Depositary Shares, Warrants, Rights or Purchase Contracts (the “Units” and, together with the Common Stock, the Preferred Stock, the Debt Securities, the Depositary Shares, the Warrants, the Rights and the Purchase Contracts, the “Securities”).

The Securities may be issued and sold or delivered as set forth in the Registration Statement, any amendment thereto, the prospectus contained therein (the “Prospectus”), and prospectuses supplementing the Prospectus or prospectuses which provide information supplementing the Prospectus (the “Prospectus Supplements”).

Each series of Debt Securities will be issued pursuant to an Indenture (the “Indenture”) dated as of October 17, 2003 between the Company and The Bank of New York Mellon Trust Company, N. A. (as successor to JPMorgan Chase Bank), as trustee (the “Trustee”).

At your request, this opinion is being furnished to you for filing as Exhibit 5.1 to the Registration Statement.

February 11, 2020

In our capacity as your counsel in the connection referred to above and as a basis for the opinions herein after expressed, we have examined (a) the Restated Certificate of Incorporation of the Company, as amended to date (the “Certificate of Incorporation”), (b) the By-laws of the Company, as amended to date (the “By-laws” and together with the Certificate of Incorporation, the “Charter Documents”), (c) the Indenture, (d) originals, or copies certified or otherwise identified, of the corporate records of the Company, including minute books of the Company as furnished to us by the Company, certificates of public officials and of representatives of the Company, statutes and other instruments and documents and (f) the Registration Statement and the Prospectus. In giving such opinions below, we have relied, to the extent we deemed proper, without independent investigation, upon certificates, statements and other representations of officers and other representatives of the Company and of governmental and public officials with respect to the accuracy and completeness of the material factual matters contained therein or covered thereby.

In making our examination, we have assumed, without independent investigation, that each document submitted to us for review is accurate and complete, each such document that is an original is authentic, each such document that is a copy conforms to an authentic original and all signatures on each such document are genuine.

In connection with this opinion, we have also assumed that:

(a) the Registration Statement and any amendments thereto (including post-effective amendments) will have become effective under the Securities Act;

(b) a Prospectus Supplement will have been prepared and filed with the Commission describing the Securities offered thereby;

(c) all Securities will be offered, issued and sold in compliance with applicable federal and state securities laws and in the manner stated in the Registration Statement (including post-effective amendments) and the appropriate Prospectus Supplement;

(d) the Board of Directors of the Company or, to the extent permitted by the Charter Documents, a duly constituted and acting committee thereof (such Board of Directors or committee being hereinafter referred to as the “Board”) will have taken all necessary corporate action to authorize the creation and issuance of the Securities and any other Securities issuable on the conversion, exchange, redemption or exercise thereof, and to authorize the terms of the offering and the issuance and sale of such Securities and related matters;

(e) a definitive purchase agreement, underwriting agreement, warrant agreement, unit agreement or similar agreement (each, a “Purchase Agreement”) with respect to any Securities offered will have been duly authorized and validly executed and delivered by the Company and the other parties thereto;

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February 11, 2020

(f) any securities issuable upon conversion, redemption, exchange or exercise of any Securities being offered will be duly authorized, created and, if appropriate, reserved for issuance upon such conversion, redemption, exchange or exercise;

(g) all Securities, and any certificates in respect thereof, will be delivered either (i) in accordance with the provisions of the applicable Purchase Agreement approved by the Board upon payment of the consideration therefor provided for therein or (ii) upon conversion, exchange, redemption or exercise of any other Security, in accordance with the terms of such Security or the instrument governing such Security providing for such conversion, exchange, redemption or exercise as approved by the Board, for the consideration approved by the Board;

(h) in the case of shares of Common Stock or Preferred Stock, (i) certificates representing such shares will have been duly executed and will have been duly countersigned by a transfer agent and duly registered by a registrar of such stock, or, if uncertificated, valid book-entry notations will have been made in the share register of the Company in accordance with the provisions of the Charter Documents, (ii) there will be sufficient shares of Common Stock or Preferred Stock, as applicable, authorized under the Company’s Charter Documents and not otherwise issued or reserved for issuance and (iii) the purchase price therefor payable to the Company, or if such shares are issuable on the conversion, exchange, redemption or exercise of another Security, the consideration payable to the Company for such conversion, exchange, redemption or exercise, will not be less than the par value of such shares, in the case of shares of Common Stock, or the purchase price or consideration, as the case may be, as approved by the Board with respect to such issuance, in the case of shares of Preferred Stock;

(i) in the case of shares of Preferred Stock of any series, the Board will have taken all necessary corporate action to designate and establish the terms of such series and will have caused a certificate of designations respecting such series to be prepared and filed with the Secretary of State of the State of Delaware;

(j) in the case of Depositary Shares, (i) the Board will have taken all necessary corporate action to establish the terms of the Depositary Shares, including any action with respect to the Preferred Stock underlying such Depositary Shares, (ii) the applicable deposit agreement (the “Deposit Agreement”) will be duly authorized, executed and delivered by the Company and the depositary thereunder appointed by the Company, (iii) the terms of such Depositary Shares and of their issuance and sale will be duly established in conformity with the Deposit Agreement, (iv) such Depositary Shares will be authorized, offered and sold in accordance with the Deposit Agreement, (v) the Securities underlying such Depositary Shares will be duly issued and deposited with the depositary, (vi) the receipts evidencing such Depositary Shares (“Receipts”) will be duly issued against the deposit of such Securities in accordance with the Deposit Agreement, (vii) the Deposit Agreement and such Receipts will be governed by New York law and will not include any provision that is unenforceable and (viii) the Receipts will be duly executed, countersigned and registered in accordance with the provisions of the applicable Deposit Agreement and duly delivered to the purchasers thereof upon payment of the agreed-upon consideration therefor;

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February 11, 2020

(k) in the case of Warrants, (i) the Board will have taken all necessary corporate action to authorize the terms of such Warrants and the warrant agreement relating thereto, (ii) such warrant agreement will have been duly executed and delivered by the Company and the warrant agent thereunder appointed by the Company, (iii) such Warrants and such warrant agreement will be governed by New York law and will not include any provision that is unenforceable and (iv) such Warrants or certificates representing such Warrants will be duly executed, countersigned, registered and delivered in accordance with the provisions of such warrant agreement;

(l) in the case of Rights, (i) the Board will have taken all necessary corporate action to authorize the terms of such Rights, (ii) the applicable rights agreement will be duly authorized by the Company and duly executed and delivered by the Company and the rights agent thereunder appointed by the Company and (iii) such Rights or certificates representing such Rights, if any, will have been duly executed, countersigned, registered and delivered in accordance with the provisions of such rights agreement and the applicable Purchase Agreement;

(m) in the case of Purchase Contracts, (i) the Board will have taken all necessary corporate action to establish the terms of such Purchase Contracts and approve the purchase contract agreement relating thereto, (ii) such Purchase Contracts will have been duly executed and delivered by the Company and the other parties thereto and (iii) such Purchase Contracts will be governed by New York law and will not include any provision that is unenforceable;

(n) in the case of Units, (i) the Board will have taken all necessary corporate action to establish the terms of such Units and the terms of the Securities such Units include, (ii) the terms of the Units and the related Securities and their issuance and sale will have been duly established in conformity with the applicable contracts, agreements or indentures that are a component of the offered Units (including authorization of the issuance of any Securities to be issued pursuant to such Units) and (iii) any agreement or other instrument establishing such Unit or defining the rights of holders of such Unit will be governed by New York law and will not contain any provision that is unenforceable; and

(o) in the case of Debt Securities of any series, (i) the Board will have taken all necessary corporate action to designate and establish the terms of such series of Debt Securities, in accordance with the terms of the Indenture, and such Debt Securities will not include any provision that is unenforceable, (ii) the Indenture will have become qualified under the Trust Indenture Act of 1939, as amended, and (iii) forms of Debt Securities complying with the terms of the Indenture and evidencing such Debt Securities will have been duly executed, authenticated, issued and delivered in accordance with the provisions of the Indenture.

Based on the foregoing, and subject to the assumptions, qualifications, limitations, and exceptions set forth herein, we are of the opinion that:

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February 11, 2020

The opinions set forth above are limited in all respects to matters of the contract law of the State of New York, the General Corporation Law of the State of Delaware and applicable federal law of the United States of America, in each case, as in effect on the date hereof.

We hereby consent to the filing of this opinion of counsel as Exhibit 5.1 to the Registration Statement. We also consent to the reference to our Firm under the heading “Legal Matters” in the Prospectus forming a part of the Registration Statement. In giving this consent, we do not hereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission thereunder.

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February 11, 2020

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EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Halliburton Company:

We consent to the use of our reports with respect to the consolidated financial statements and the effectiveness of internal control over financial reporting incorporated by reference herein and to the reference to our firm under the heading “Experts” in the prospectus. Our report dated February 11, 2020 on the consolidated financial statements refers to a change in accounting for leases.

/s/ KPMG LLP

Houston, Texas

February 11, 2020

EXHIBIT 24.1

POWER OF ATTORNEY

WHEREAS, Halliburton Company, a Delaware corporation (the “Company”), intends to file with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Act”), a Registration Statement on Form S-3, including a prospectus, with such amendment or amendments thereto as may be necessary or appropriate, together with any and all exhibits and other documents having relation to said Registration Statement (collectively, the “Registration Statement”);

NOW, THEREFORE, each of the undersigned, in his or her capacity as a director of the Company, does hereby appoint Robb L. Voyles, Van H. Beckwith and Bruce A. Metzinger, each of whom may act without the joinder of the other, as his or her true and lawful attorneys-in-fact and agents with power to act and with full power of substitution and resubstitution, to execute in his or her name, place and stead, in his or her capacity as a director of the Company, the Registration Statement and all instruments necessary or incidental in connection therewith, with such amendment or amendments thereto in each case as said attorneys-in-fact and agents or any of them shall deem necessary or appropriate, together with any and all exhibits and other documents relating thereto as said attorneys-in-fact and agents or any of them shall deem necessary or appropriate or incidental in connection therewith, and to file the same or cause the same to be filed with the Commission. Said attorneys-in-fact and agents shall have full power and authority to do and perform in the name and on behalf of each of the undersigned, in any and all capacities, every act whatsoever necessary or desirable to be done to the premises, as fully and to all intents and purposes as each of the undersigned might or could do in person, each of the undersigned hereby ratifying and approving the acts of said attorneys-in-fact and agents or any of them or their substitutes.

IN WITNESS WHEREOF, pursuant to the requirements of the Act, this Registration Statement has been signed by the following persons in the capacities indicated on this 11^th day of February, 2020.

SIGNATURE

EXHIBIT 25.1

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM T-1

STATEMENT OF ELIGIBILITY

UNDER THE TRUST INDENTURE ACT OF 1939

OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE

THE BANK OF NEW YORK MELLON

TRUST COMPANY, N.A.

(Exact name of trustee as specified in its charter)

HALLIBURTON COMPANY

(Exact name of obligor as specified in its charter)

Debt Securities

(Title of the indenture securities)

Yes.

If the obligor is an affiliate of the trustee, describe each such affiliation.

None.

Exhibits identified in parentheses below, on file with the Commission, are incorporated herein by reference as an exhibit hereto, pursuant to Rule 7a-29 under the Trust Indenture Act of 1939 (the “Act”) and 17 C.F.R. 229.10(d).

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SIGNATURE

Pursuant to the requirements of the Act, the Trustee, The Bank of New York Mellon Trust Company, N.A., a banking association organized and existing under the laws of the United States of America, has duly caused this statement of eligibility to be signed on its behalf by the undersigned, thereunto duly authorized, all in the City of Chicago, and State of Illinois, on the 3rd day of February, 2020.

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EXHIBIT 7

Consolidated Report of Condition of

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A.

of 400 South Hope Street, Suite 500, Los Angeles, CA 90071

At the close of business September 30, 2019, published in accordance with Federal regulatory authority instructions.

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I, Matthew J. McNulty, CFO of the above-named bank do hereby declare that the Reports of Condition and Income (including the supporting schedules) for this report date have been prepared in conformance with the instructions issued by the appropriate Federal regulatory authority and are true to the best of my knowledge and belief.

We, the undersigned directors (trustees), attest to the correctness of the Report of Condition (including the supporting schedules) for this report date and declare that it has been examined by us and to the best of our knowledge and belief has been prepared in conformance with the instructions issued by the appropriate Federal regulatory authority and is true and correct.

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