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.

Ultra controls more than 147,000 gross (79,566 net) acres in and around the prolific 90 square mile Pinedale Field and the 36 square mile Jonah Field. Ultra believes that these areas hold greater than 35 Tcfe of gross recoverable reserves. At year-end 2006, Ultra has an undrilled inventory of over 4,800 low risk high rate of return well locations that average nearly 5 Bcfe of natural gas reserves as identified by its third party reservoir engineering firm. Currently, the company is awaiting a Record of Decision that will enable it to gain more access year round to its core Wyoming acreage that could allow the company to accelerate its development of the Pinedale Field.

Over the past seven years, Ultra has grown proved reserves more than 3,000 percent to over 2.3 Tcfe. Production for the last five years has increased at a compound annual growth rate of 60% to 91.6 Bcfe in 2006.

The company's head office is in Houston, Texas, with an operations office in Denver, Colorado and a field office in Pinedale, Wyoming.

Ultra Petroleum trades on the New York Stock Exchange under the ticker "UPL".