Alta Mesa

Alta Mesa Holdings, LP, together with its consolidated subsidiaries (“we,” or the “Company,”), is an independent exploration and production company focused on the acquisition, development, exploration and exploitation of unconventional onshore oil and natural gas reserves in the eastern portion of the Anadarko Basin in Oklahoma. We were formed in 1987 as a private Texas limited partnership. Our principal offices are at 15021 Katy Freeway, Suite 400, Houston, Texas 77094 and our main phone number is (281) 530-0991. Beginning in the 1990’s, our predecessor operations were focused on vertical wells, waterfloods and analyzing the commercial productivity of the stacked formations on our acreage. Since 2012, our activities have become primarily directed at the horizontal development of an oil and liquids-rich resource play in an area of the Anadarko Basin commonly referred to as the Sooner Trend Anadarko Basin Canadian and Kingfisher County (“STACK”). The STACK is a prolific hydrocarbon system with high oil and liquids-rich natural gas content, with potential for multiple horizontal target horizons, extensive production history and high drilling success rates. We generally maintain operational control of the majority of our properties, either through directly operating them or through operating arrangements with other interest owners. We conduct all of our operations in the Upstream segment.