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Halliburton Company is an American multinational corporation. One of the world's largest oil field service companies, it has operations in more than 70 countries. It owns hundreds of subsidiaries, affiliates, branches, brands, and divisions worldwide and employs approximately 50,000 people. The company has dual headquarters located in Houston and in Dubai, and it remains incorporated in the United States. Halliburton's major business segment is the Energy Services Group (ESG).