Shareholder Vote

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 21, 2025 HALLIBURTON COMPANY (Exact name of registrant as specified in its charter) Delaware 001-03492 75-2677995 (State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.) 3000 North Sam Houston Parkway East, Houston, Texas 77032 (Address of principal executive offices) (Zip Code) Registrant’s telephone number, including area code: ( 281 ) 871-2699 Not Applicable (Former name or former address, if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol Name of each exchange on which registered Common Stock, par value $2.50 per share HAL New York Stock Exchange Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Item 5.07. Submission of Matters to a Vote of Security Holders. On May 21, 2025 , Halliburton Company (“Halliburton”) held its Annual Meeting of Shareholders. Shareholders were asked to consider and act upon: (1) The election of Directors; (2) Ratification of the appointment of KPMG LLP as independent public accountants to examine the financial statements and books and records of Halliburton for the year 2025 ; and (3) An advisory approval of executive compensation. The voting results for each matter are set out below. 1. Election of Directors: All Director nominees were elected at the Annual Meeting. For Against Abstain Broker Non-Votes A.F. Al Khayyal 617,458,907 6,816,305 742,445 93,936,775 W.E. Albrecht 613,157,788 11,176,400 683,469 93,936,775 M.K. Banks 608,020,848 15,970,310 1,026,499 93,936,775 A.M. Bennett 580,699,728 43,629,266 688,663 93,936,775 E.M. Cummings 614,842,335 9,478,398 696,924 93,936,775 M.S. Gerber 587,662,038 36,675,846 679,773 93,936,775 R.A. Malone 590,250,217 34,091,197 676,243 93,936,775 J.A. Miller 582,462,388 41,843,948 711,321 93,936,775 M.S. Smith 618,713,186 5,462,695 841,776 93,936,775 J.L. Weiss 608,034,853 15,800,170 1,182,634 93,936,775 T.M. Edwards Young 582,091,982 41,821,937 1,103,738 93,936,775 2. Ratification of the selection of auditors: The proposal to ratify the appointment of KPMG LLP as the independent auditors of Halliburton for 202 5 wa s approved For 672,451,192 Against 45,637,779 Abstain 865,461 Broker Non-Votes N/A 3. Advisory approval of executive compensation: The advisory resolution to approve Halliburton’s executive compensation as described in the proxy statement was approved. For 589,553,288 Against 34,440,683 Abstain 1,023,686 Broker Non-Votes 93,936,775 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. HALLIBURTON COMPANY Date: May 21, 2025 By: /s/ Pamela L. Taylor Pamela L. Taylor Vice President, Public Law and Assistant Secretary