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Harper Oil Co. is a Springfield, IL-based company in the Energy & Utilities sector.
Bayou City Exploration is a Houston, TX-based company in the Energy and Utilities sector.
Guttman Oil Company is a Belle Vernon, PA-based company in the Energy and Utilities sector.
Black Raven Energy is a Denver, CO-based company in the Energy and Utilities sector.
Exor Energy is a New York, NY-based company in the Energy and Utilities sector.