Exhibit 21.1

HALLIBURTON COMPANY
Subsidiaries of the Registrant
December 31, 2025
| STATE OR COUNTRY
NAME OF COMPANY | OF INCORPORATION
Brezz Newco (Halliburton Netherlands Holdings B.V) | Netherlands
Halliburton Energy Services, Inc. | United States, Delaware
Halliburton Global Affiliates Holdings B.V. | Netherlands
Halliburton Global Holdings B.V. | Curacao
Halliburton Global Holdings, LLC | United States, Delaware
Halliburton Global Netherlands Cooperatief U.A. | Netherlands
Halliburton Group Technologies, Inc. | United States, Delaware
Halliburton Holdings, LLC | United States, Delaware
Halliburton Offshore Technologies, Inc. | United States, Delaware
Halliburton Operations Finance Company, LLC | United States, Texas
Halliburton Swiss Holdings GmbH | Switzerland
Halliburton Technology Holdings, Inc. | United States, Delaware
Halliburton Technology Partners LLC | United States, Delaware
Halliburton US International Holdings | United States, Delaware