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hal-20260421

0000045012falseCHX00000450122026-04-212026-04-210000045012exch:XNYS2026-04-212026-04-210000045012exch:XCHI2026-04-212026-04-21

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): April 21, 2026

HALLIBURTON COMPANY

(Exact name of registrant as specified in its charter)

Delaware 001-0349275-2677995

(State or other jurisdiction of incorporation)(Commission File Number)(IRS Employer Identification No.)

3000 North Sam Houston Parkway East,Houston,Texas77032

(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 classTrading SymbolName of each exchange on which registered

Common Stock, par value $2.50 per shareHALNew York Stock Exchange

NYSE Texas

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 2.02. Results of Operations and Financial Condition

On April 21, 2026, Halliburton Company (the “Company”) issued a press release announcing its financial results for the quarter ended March 31, 2026 and providing access information for an investor conference call to discuss those results. The scheduled conference call was previously announced on March 20, 2026. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is hereby incorporated by reference into this Item 2.02. The press release will be published on the Company’s website at www.halliburton.com.

The Company’s press release announcing its results for the quarter ended March 31, 2026 and information to be discussed on the conference call contain certain non-GAAP financial measures (as defined under the Securities and Exchange Commission’s Regulation G). Generally, a non-GAAP financial measure is a numerical measure of a company’s performance, financial position, or cash flows that either excludes or includes amounts that are not normally excluded or included in the most directly comparable measure calculated and presented in accordance with generally accepted accounting principles, or GAAP. The Company has provided reconciliations within the press release and in the Quarterly Results and Presentations section of our website of the non-GAAP measures to the most directly comparable GAAP financial measure.

In accordance with General Instruction B.2 of Form 8-K, the information included in this Current Report under Item 2.02 and in the press release as Exhibit 99.1 is deemed to be “furnished” and shall not be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (Exchange Act), or incorporated by reference in any filing under the Securities Act of 1933, as amended (Securities Act), or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 7.01. Regulation FD Disclosure

On April 21, 2026, the Company issued a press release announcing its results for the quarter ended March 31, 2026. A copy of the press release is set forth in Exhibit 99.1 and is incorporated herein by reference.

In accordance with General Instruction B.2 of Form 8-K, the information included in this Current Report under Item 7.01 and in the press release as Exhibit 99.1 is deemed to be “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or incorporated by reference in any filing under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01. Financial Statements and Exhibits

In accordance with General Instruction B.2 of Form 8-K, the information set forth in the attached Exhibit 99.1 is deemed to be “furnished” and shall not be deemed to be “

hal-202601210000045012falseCHX00000450122026-01-212026-01-210000045012exch:XNYS2026-01-212026-01-210000045012exch:XCHI2026-01-212026-01-21

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): January 21, 2026

HALLIBURTON COMPANY

(Exact name of registrant as specified in its charter)

Delaware 001-0349275-2677995 (State or other jurisdiction of incorporation)(Commission File Number)(IRS Employer Identification No.)

3000 North Sam Houston Parkway East,Houston,Texas77032 (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 classTrading SymbolName of each exchange on which registered Common Stock, par value $2.50 per shareHALNew York Stock Exchange NYSE Texas

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 2.02. Results of Operations and Financial Condition

On January 21, 2026, Halliburton Company (the “Company”) issued a press release announcing its financial results for the quarter ended December 31, 2025 and providing access information for an investor conference call to discuss those results. The scheduled conference call was previously announced on December 12, 2025. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and is hereby incorporated by reference into this Item 2.02. The press release will be published on the Company’s website at www.halliburton.com.

The Company’s press release announcing its results for the quarter ended December 31, 2025 and information to be discussed on the conference call contain certain non-GAAP financial measures (as defined under the Securities and Exchange Commission’s Regulation G). Generally, a non-GAAP financial measure is a numerical measure of a company’s performance, financial position, or cash flows that either excludes or includes amounts that are not normally excluded or included in the most directly comparable measure calculated and presented in accordance with generally accepted accounting principles, or GAAP. The Company has provided reconciliations within the press release and in the Quarterly Results and Presentations section of our website of the non-GAAP measures to the most directly comparable GAAP financial measure.

In accordance with General Instruction B.2 of Form 8-K, the information included in this Current Report under Item 2.02 and in the press release as Exhibit 99.1 is deemed to be “furnished” and shall not be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (Exchange Act), or incorporated by reference in any filing under the Securities Act of 1933, as amended (Securities Act), or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 7.01. Regulation FD Disclosure

On January 21, 2026, the Company issued a press release announcing its results for the quarter ended December 31, 2025. A copy of the press release is set forth in Exhibit 99.1 and is incorporated herein by reference.

In accordance with General Instruction B.2 of Form 8-K, the information included in this Current Report under Item 7.01 and in the press release as Exhibit 99.1 is deemed to be “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or incorporated by reference in any filing under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01. Financial Statements and Exhibits

In accordance with General Instruction B.2 of Form 8-K, the information set forth in the attached Exhibit 99.1 is deemed to be “furnished” and shall not be deemed to