Halliburton

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-04-30 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: HALLIBURTON CO (HAL) CIK: 0000045012 --- Reporting Owner --- Name: Young Tobi M. CIK: 0001914276 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-04-30 | Code: S (Open market sale) Shares: -5,625 | Price: $41.72 Total Value: $234,675.00 Shares Owned After: 15,750 | Ownership: D (Direct) [Transaction #2] Security: Common Stock Date: 2026-04-30 | Code: S (Open market sale) Shares: -500 | Price: $41.73 Total Value: $20,862.50 Shares Owned After: 15,250 | Ownership: D (Direct) --- Holdings --- [Holding #1] Security: 12/2025 Restricted Stock Units Ownership: D (Direct) Footnotes: [F1] Each restricted stock unit represents a right to receive one share of the Company's common stock. [F2] The restricted stock units vest in one year on the first anniversary of the award. Shares will be delivered to the reporting person either upon vesting, or if reporting person elected to defer receipt, following cessation as a director. [F2] The restricted stock units vest in one year on the first anniversary of the award. Shares will be delivered to the reporting person either upon vesting, or if reporting person elected to defer receipt, following cessation as a director. --- Footnotes (Complete Index) --- F1: Each restricted stock unit represents a right to receive one share of the Company's common stock. F2: The restricted stock units vest in one year on the first anniversary of the award. Shares will be delivered to the reporting person either upon vesting, or if reporting person elected to defer receipt, following cessation as a director. --- Signature --- /s/ /s/ Sarah I. Rubenfeld, by Power of Attorney (2026-05-01)