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Mansfield Oil Company is one of the leading companies in the Energy and Utilities sector.
Shell Oil Company is the United States-based wholly owned subsidiary of Royal Dutch Shell, a transnational corporation "oil major" of Anglo-Dutch origins, which is amongst the largest oil companies in the world.
Northern Star Generation is a Houston, TX-based company in the Energy and Utilities sector.
Production Sciences is a Spring, TX-based company in the Energy and Utilities sector.
Vittitow Cabinet Shop is a New Haven, KY-based company in the Energy and Utilities sector.