Halliburton Co

For the fiscal year ended December 31 , 2025 or ☐

For the transition period from _______to_______ Commission File Number 001-03492

HALLIBURTON COMPANY (Exact name of registrant as specified in its charter)

(Address of principal executive offices)

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1 (b). ☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). ☐ Yes ☒ No The aggregate market value of Halliburton Company Common Stock held by non-affiliates on June 30, 2025 , determined using the per share closing price on the New York Stock Exchange Composite tape of $20.38 on that date, was approximately $ 15.2 billion . As of January 30, 2026 , there were 837,548,345 shares of Halliburton Company Common Stock, $ 2.50 par value per share, outstanding. Portions of the Halliburton Company Proxy Statement for our 2026 Annual Meeting of Shareholders (File No. 001-03492) are incorporated by reference into Part III of this report.

HALLIBURTON COMPANY Index to Form 10-K For the Year Ended December 31, 2025 PART I

Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Management's Discussion and Analysis of Financial Condition and Results of Operations

Business Environment and Results of Operations

Results of Operations in 2025 Compared to 2024

Results of Operations in 2024 Compared to 2023

New Accounting Standards Not Yet Adopted

Quantitative and Qualitative Disclosures About Market Risk

Financial Statements and Supplementary Data

Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Directors, Executive Officers, and Corporate Governance

Security Ownership of Certain Beneficial Owners

Securities Authorized for Issuance Under Equity Compensation Plans

Certain Relationships and Related Transactions, and Director Independence

Exhibits and Financial Statement Schedules