[Form 4] HALLIBURTON CO Insider Trading Activity

Rhea-AI Filing Summary

Halliburton (HAL) insider activity: A company officer (President - Western Hemisphere) reported selling 160,000 shares of common stock on 11/12/2025 at $27.77 per share (transaction code S), pursuant to a Rule 10b5-1 trading plan adopted on August 13, 2025.

Following the sale, the reporting person beneficially owned 452,373.607 shares. This figure includes 901.551 shares purchased through the Employee Stock Purchase Plan for the period ending March 31, 2025, and 10,193.461 shares accumulated via dividend reinvestment as of September 30, 2025. The filer also lists outstanding stock options, including 43,924 options at a $27.14 exercise price expiring 12/20/2028 and 28,604 options at $34.48 expiring 01/04/2026.

Insider Trade Summary

Net Seller: 160,000 shares ($4,443,200)

Net Sell 5 txns

Insider Richard Mark

Role President - Western Hemisphere

Sold 160,000 shs ($4.44M)

Type	Security	Shares	Price	Value
Sale	Common Stock	160,000	$27.77	$4.44M
holding	Option to Buy Common Stock (12/2018)	--	--	--
holding	Option to Buy Common Stock (01/2018)	--	--	--
holding	Option to Buy Common Stock	--	--	--
holding	Option to Buy Common Stock	--	--	--

Holdings After Transaction: Common Stock — 452,373.607 shares (Direct); Option to Buy Common Stock (12/2018) — 43,924 shares (Direct); Option to Buy Common Stock (01/2018) — 24,019 shares (Direct); Option to Buy Common Stock — 17,119 shares (Direct)

Footnotes (1)

1. The sale was effected pursuant to a Rule 10b5-l trading plan adopted by the Reporting Person on August 13, 2025. Includes 901.551 shares of stock purchased through the Halliburton Company Employee Stock Purchase Plan for the period ending March 31, 2025. Includes 10,193.461 shares of stock accumulated through dividend reinvestment as of September 30, 2025.

Form 4 Insider Transactions: What Each Field Means →

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

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)
11/12/2025

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	11/12/2025		S(1)		160,000	D	$27.77	452,373.607(2)(3)	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
Option to Buy Common Stock	$34.48							01/04/2016	01/04/2026	Common Stock	28,604		28,604	D

Explanation of Responses:

1. The sale was effected pursuant to a Rule 10b5-l trading plan adopted by the Reporting Person on August 13, 2025.

2. Includes 901.551 shares of stock purchased through the Halliburton Company Employee Stock Purchase Plan for the period ending March 31, 2025.

3. Includes 10,193.461 shares of stock accumulated through dividend reinvestment as of September 30, 2025.

Remarks:

	/s/ Sarah I. Rubenfeld, by Power of Attorney	11/13/2025
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.