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Harper Oil Co. is a Springfield, IL-based company in the Energy and Utilities sector.
Diversified Energy Company plc, formerly Diversified Gas & Oil plc, is a gas and oil production company operating in the Appalachian Basin in the United States.
Access Exploration Corporation is a Houston, TX-based company in the Energy and Utilities sector.
Acero Engineering Inc. is a Calgary, AB-based company in the Energy and Utilities sector.