Texas Vanguard Oil Company is engaged in the acquisition, exploration, development, and operation of onshore oil and natural gas properties in the United States, principally in Texas. The Company also engages in oil and natural gas exploration, development and production in New Mexico, Oklahoma, Nebraska, and Wyoming. Along with operated producing properties, the Company acquires non-operated interests, leasehold interests and participates in re-entries and low risk drilling projects. The Company sells all of its production to traditional industry purchasers, such as pipeline and crude oil companies, who have the facilities to transport the oil and natural gas from the well site. The Company had recorded revenues in excess of 10% of total revenue from DCP Midstream (15% during the year ended December 31, 2011) and Plains Marketing (51% in 2011).