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The Subsurface Group is a Houston, TX-based company in the Energy and Utilities sector.
Milford Redi-mix Co is a Milford, MI-based company in the Energy and Utilities sector.
Tri City Services Inc is a Lafayette, LA-based company in the Energy and Utilities sector.
Porta Gas Inc is a Houston, TX-based company in the Energy and Utilities sector.
Northern Oil and Gas, Inc. (NYSE: NOG) is a company with a primary strategy of investing in non-operated minority working and mineral interests in oil & gas properties, with a core area of focus in the premier basins within the United States. Northern is the largest publicly traded non-operated exploration and production company.