Tranche Update on PrimeEnergy Resources Corporation's Equity Buyback Plan announced on November 15, 2006.

PrimeEnergy Resources Corporation is an independent oil and natural gas company engaged in acquiring, developing, and producing oil and natural gas. The Company owns leasehold, mineral and royalty interests in producing and non-producing oil and gas properties across the United States, primarily in Oklahoma, and Texas. Through its subsidiaries Prime Operating Company, Eastern Oil Well Service Company, and EOWS Midland Company, it acts as operator and provides well-servicing support operations for many of the onshore oil and gas wells it operates, as well as for third parties. It operates approximately 534 active wells and owns non-operating interests and royalties in approximately 952 additional wells. It maintains an acreage position of approximately 16,407 gross (9,341 net) acres in the Permian Basin in West Texas, primarily in Reagan, Upton, Martin and Midland counties. It has over 511 producing wells in the Mid-Continent area, of which 128 wells are operated by the Company.