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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"
Aviva Inc is a Denver, CO-based company in the Energy and Utilities sector.
HKN is a Southlake, TX-based company in the Energy and Utilities sector.
NexTier Oilfield Solutions is a leading provider of integrated completions focused on accelerating production in the most demanding US land basins.