HALLIBURTON CO - Director's Dealing 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: HALLIBURTON CO (HAL)
CIK: 0000045012
Period of Report: 2025-11-12

Reporting Person: Richard Mark (President - Western Hemisphere)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-11-12	Common Stock	S	160000	$27.77	Disposed	452373.607	Direct

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Option to Buy Common Stock (12/2018)	$27.14	2028-12-20	Common Stock (43924)	43924	Direct
Option to Buy Common Stock (01/2018)	$49.61	2028-01-02	Commom Stock (24019)	24019	Direct
Option to Buy Common Stock	$55.68	2027-01-03	Common Stock (17119)	17119	Direct
Option to Buy Common Stock	$34.48	2026-01-04	Common Stock (28604)	28604	Direct

F1: The sale was effected pursuant to a Rule 10b5-l trading plan adopted by the Reporting Person on August 13, 2025.

F2: Includes 901.551 shares of stock purchased through the Halliburton Company Employee Stock Purchase Plan for the period ending March 31, 2025.

F3: Includes 10,193.461 shares of stock accumulated through dividend reinvestment as of September 30, 2025.