Halliburton (HAL) president reports tax-withholding share transfer and option holdings

Rhea-AI Filing Summary

Halliburton Company executive Richard Mark, President - Western Hemisphere, reported a routine tax-related share withholding. On January 8, 2026, 7,469 shares of Halliburton common stock were transferred to the company at a price of $29.60 per share to cover federal tax withholding when previously granted restricted stock vested. After this transaction, Mark beneficially owned 480,691.517 shares of common stock.

The filing also lists existing stock options held directly by Mark, including options to buy 43,924 shares at $27.14 expiring December 20, 2028, 24,019 shares at $49.61 expiring January 2, 2028, and 17,119 shares at $55.68 expiring January 3, 2027. These options are holdings and not new option grants.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Richard Mark

(Last) (First) (Middle)

3000 N. SAM HOUSTON PKWY E.

(Street)

HOUSTON TX 77032

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
HALLIBURTON CO [ HAL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President - Western Hemisphere

3. Date of Earliest Transaction (Month/Day/Year)
01/08/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	01/08/2026		F		7,469(1)	D	$29.6(2)	480,691.517	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Option to Buy Common Stock (12/2018)	$27.14							12/20/2018	12/20/2028	Common Stock	43,924		43,924	D
Option to Buy Common Stock (01/2018)	$49.61							01/02/2018	01/02/2028	Commom Stock	24,019		24,019	D
Option to Buy Common Stock	$55.68							01/03/2017	01/03/2027	Common Stock	17,119		17,119	D

Explanation of Responses:

1. Shares transferred to Halliburton Company for payment for Federal tax withholding obligations on lapse of restrictions on shares issued under the Stock and Incentive Plan. Said Plan permits Reporting Person to satisfy withholding tax obligation by transferring unrestricted shares to the Issuer.

2. The stock vested on January 2, 2026 and January 3, 2026 and is related to stock granted on January 3, 2022, January 3, 2023, January 2, 2024, and January 2, 2025. January 3, 2026 was a non-market date. The closing price of Halliburton Company's Common Stock on the New York Stock Exchange on January 2, 2026 was $29.60. Shares were withheld for tax reporting on January 8, 2026.

Remarks:

	/s/ Sarah I. Rubenfeld, by Power of Attorney	01/09/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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FAQ

What insider transaction did Halliburton (HAL) report for Richard Mark?

Halliburton reported that Richard Mark, President - Western Hemisphere, had 7,469 shares of common stock transferred to Halliburton on January 8, 2026 to cover federal tax withholding related to vesting of restricted stock granted under the Stock and Incentive Plan.

What was the share price used for Richard Mark's tax withholding transaction at Halliburton (HAL)?

The shares used to satisfy the tax withholding were valued at a closing price of $29.60 per Halliburton common share, based on the New York Stock Exchange closing price on January 2, 2026.

How many Halliburton (HAL) shares does Richard Mark own after the reported Form 4 transaction?

After the tax withholding transaction, Richard Mark beneficially owned 480,691.517 shares of Halliburton common stock, held directly.

Were the Halliburton (HAL) shares sold by Richard Mark an open-market sale?

No. The footnotes state the 7,469 shares were transferred to Halliburton to pay federal tax withholding upon the lapse of restrictions on shares issued under the company’s Stock and Incentive Plan, rather than being sold in an open-market trade.

What stock options does Richard Mark hold in Halliburton (HAL) according to this filing?

The filing lists directly held options to buy Halliburton common stock: 43,924 shares at $27.14 expiring December 20, 2028; 24,019 shares at $49.61 expiring January 2, 2028; and 17,119 shares at $55.68 expiring January 3, 2027.

What triggered the vesting that led to the tax withholding for Halliburton (HAL) executive Richard Mark?

The footnotes explain that the stock vested on January 2, 2026 and January 3, 2026, related to stock granted on January 3, 2022, January 3, 2023, January 2, 2024, and January 2, 2025, leading to the tax withholding reported on January 8, 2026.