PRIMEENERGY CORP. is engaged generally in the oil and gas business through the acquisition, development, and production of crude oil and natural gas, and to a much lesser degree, exploratory drilling operations. Their properties are located primarily in Oklahoma, Texas, West Virginia, New Mexico, Montana and Wyoming. Their wholly-owned subsidiary, PrimeEnergy Management Corporation, acts as the managing general partner in 51 exploration and development limited partnerships, joint ventures and asset and income fund limited partnerships.