PrimeEnergy Corporation1 Landmark Square, Suite 1100, Stamford, Connecticut, United States

PrimeEnergy Corporation (“the Company”) is an independent oil and gas company actively engaged in acquiring, developing and producing oil and natural gas. The Company’s common stock shares are traded in the NASDAQ stock market under the symbol “PNRG”.The Company is headquartered in Houston, Texas with operating offices in Midland, Texas, Oklahoma City, Oklahoma and Charleston, West Virginia. A corporate office is located in Stamford, Connecticut. PrimeEnergy owns leasehold, mineral and royalty interests in producing and non-producing oil and gas properties across the continental United States and in the Gulf of Mexico. The Company operates approximately 1,500 wells and owns non-operating interests in 850 additional wells. The Company’s off-shore operations in the Gulf of Mexico are conducted through its subsidiary, Prime Offshore L.L.C., with its offices in Houston, Texas.Operations on-shore are conducted through the Company’s subsidiary, Prime Operating Company, with its principal offices in Houston, Texas and district offices in Oklahoma City, Oklahoma, Midland, Texas and Charleston, West Virginia, with field offices in Oklahoma, Texas and West Virginia. Through its subsidiaries, Eastern Oil Well Service Company, Southwest Oilfield Construction Company and EOWS Midland Company, the Company provides well service support operations, site preparation and construction services for drilling and re-working operations both in connection with the Company’s activities and providing contract services for third parties.