144 0001970357 XXXXXXXX LIVE 0000045012 HALLIBURTON CO 001-03492 3000 NORTH SAM HOUSTON PARKWAY EAST 3000 NORTH SAM HOUSTON PARKWAY EAST HOUSTON TX 77032 2818712699 Slocum Jeffrey Shannon Officer Director Common Fidelity Brokerage Services LLC

900 Salem Street Smithfield RI 02917

52572 1844843.54 833130367 08/19/2026 NYSE Common 03/31/2022 ESPP Purchase Issuer N 545 03/31/2022 Cash Common 06/30/2022 ESPP Purchase Issuer N 324 06/30/2022 Cash Common 02/27/2023 Restricted Stock Vesting Issuer N 1 02/27/2023 Compensation Common 03/31/2023 ESPP Purchase Issuer N 527 03/31/2023 Cash Common 06/30/2023 ESPP Purchase Issuer N 151 06/30/2023 Cash Common 10/28/2023 Restricted Stock Vesting Issuer N 2424 10/28/2023 Compensation Common 01/02/2024 Restricted Stock Vesting Issuer N 1846 01/02/2024 Compensation Common 01/03/2024 Restricted Stock Vesting Issuer N 6421 01/03/2024 Compensation Common 01/04/2024 Restricted Stock Vesting Issuer N 7031 01/04/2024 Compensation Common 03/28/2024 ESPP Purchase Issuer N 615 03/28/2024 Cash Common 06/28/2024 ESPP Purchase Issuer N 70 06/28/2024 Cash Common 10/28/2024 Restricted Stock Vesting Issuer N 2389 10/28/2024 Compensation Common 01/02/2025 Restricted Stock Vesting Issuer N 4417 01/02/2025 Compensation Common 01/03/2025 Restricted Stock Vesting Issuer N 6478 01/03/2025 Compensation Common 01/04/2025 Restricted Stock Vesting Issuer N 7030 01/04/2025 Compensation Common 03/03/2025 Restricted Stock Vesting Issuer N 10405 03/03/2025 Compensation Common 03/31/2025 ESPP Purchase Issuer N 902 03/31/2025 Cash Common 04/27/2025 Restricted Stock Vesting Issuer N 996 04/27/2025 Compensation N J.Shannon Slocum

3000 North Sam Houston Parkway East Houston TX 77032

Common 08/18/2026 16121 565577.90 08/19/2026 05/08/2026 /s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for J.Shannon Slocum