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Southwestern Energy (also known as SWN, NYSE: SWN) is an oil and natural gas company based in Houston. Texas. Its primary current activity is, according to the company, "current operations being principally focused on development of the unconventional gas reservoir located on the Arkansas side of the Arkoma Basin"
American Liberty Oil Company is a Kaufman, TX-based company in the Energy & Utilities sector.
Wavefront Energy is a Edmonton, AB-based company in the Energy & Utilities sector.
Seneca Resources Corporation, the exploration and production segment of National Fuel Gas Company, headquartered in Houston, Texas, explores for, develops and produces natural gas and oil reserves in California, Kansas and the Appalachian Region including the Marcellus and Utica Shales.
Vesco Oil Corporation is a Southfield, MI-based company in the Energy and Utilities sector.