Ultra Petroleum Corp. is an independent exploration and production company focused on its core properties in the Green River Basin of southwestern Wyoming; the Pinedale and Jonah Fields; and is in the early development stages in the Appalachian Basin in Pennsylvania. Ultra controls more than 121,432 gross (59,953 net) acres in and around the prolific 90 square mile Pinedale Field and the 36 square mile Jonah Field. Ultra believes that these areas combined hold greater than 48 Tcfe of gross recoverable reserves. At year-end 2008, Ultra had an undrilled inventory of 5,570 low risk, high rate of return well locations that average over 4 Bcfe of natural gas reserves, as identified by its third party reservoir engineering firm. Over the past ten years, Ultra has grown proved reserves more than 4,700 percent to over 3.5 Tcfe. Production for the last ten years has increased at a compound annual growth rate of 46 percent to over 145 Bcfe in 2008. The companyÍs head office is in Houston, Texas, with an operations office in Denver, Colorado, and a field office in Pinedale, Wyoming. Ultra Petroleum trades under the symbol ñUPLî on the New York Stock Exchange.