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 20, 2026 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 NYSE Texas, Inc. 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 20, 2026, Halliburton Company (“Halliburton”) held its Annual Meeting of Shareholders. Shareholders were asked to consider and act upon: (1) The election of Directors; (2) A proposal to ratify the appointment of KPMG LLP as principal independent public accountants to examine the financial statements and books and records of Halliburton for the year 2026; (3) A proposal to approve on an advisory basis Halliburton's executive compensation; (4) A proposal to approve the Halliburton Energy Services, Inc. charter amendment; (5) A proposal to amend and restate the Halliburton Company Stock and Incentive Plan; and (6) A proposal to amend and restate the Halliburton Company Employee Stock Purchase Plan. 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 619,883,885 11,213,978 932,599 79,598,195 W.E. Albrecht 622,799,328 8,346,068 885,066 79,598,195 M.K. Banks 615,534,123 15,246,464 1,249,875 79,598,195 E.M. Cummings 623,197,722 7,946,408 886,332 79,598,195 M.S. Gerber 608,697,500 22,436,434 896,528 79,598,195 T.A. Leach 619,917,948 7,940,092 4,172,422 79,598,195 R.A. Malone 590,160,463 37,705,146 4,164,853 79,598,195 J.A. Miller 599,536,039 31,594,732 899,691 79,598,195 J.S. Slocum 624,926,490 6,181,575 922,397 79,598,195 M.S. Smith 608,905,689 18,563,203 4,561,570 79,598,195 J.L. Weiss 624,122,565 7,045,282 862,615 79,598,195 T.M. Edwards Young 539,002,964 92,123,434 904,064 79,598,195 2. Ratification of the appointment of auditors: The proposal to ratify the appointment of KPMG LLP as principal independent public accountants to examine the financial statements and books and records of Halliburton for the year ending December 31, 2026 wa s approved. For 674,149,410 Against 36,742,407 Abstain 736,840 Broker Non-Votes N/A 3. Advisory approval of executive compensation: The proposal to approve on an advisory basis Halliburton’s executive compensation as described in the proxy statement was approved. For 608,197,911 Against 21,910,320 Abstain 1,922,231 Broker Non-Votes 79,598,195 4. Approval of the Halliburton Energy Services, Inc. charter amendment: The proposal to approve the Halliburton Energy Services, Inc. charter amendment was approved. For 629,853,331 Against 1,221,691 Abstain 955,440 Broker Non-Votes 79,598,195 5. Amendment and Restatement of the Halliburton Company Stock and Incentive Plan: The proposal to amend and restate the Halliburton Company Stock and Incentive Plan was approved. For 595,921,363 Against 34,184,673 Abstain 1,924,426 Broker Non-Votes 79,598,195 6. Amendment and Restatement of the Halliburton Company Employee Stock Purchase Plan: The proposal to amend and restate the Halliburton Company Employee Stock Purchase Plan was approved. For 626,889,047 Against 4,286,717 Abstain 854,698 Broker Non-Votes 79,598,195 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 20, 2026 By: /s/ Pamela L. Taylor Pamela L. Taylor Vice President, Public Law and Assistant Secretary