Navajo Nation Oil and Gas Company agreed to acquire 10% stake in Aneth Field in the Paradox Basin from Resolute Energy Corporation (NYSE:REN) for $100 million on April 9, 2012. The purchase price is subject to adjustments and secured by a 10% deposit. In a related transaction, Navajo Nation Oil and Gas Company and Resolute Energy Corporation (NYSE:REN) acquired unknown stake in Aneth Field in the Paradox Basin for $75 million. The parties entered into a purchase and sale agreement relating to the option exercise which provides that the transaction will be closed and the purchase price to be paid in two equal transfers of $50 million, each for 5% of Resolute's interest in the properties. The transfers will take place in July 2012 and January 2013, each with an effective date of January 1, 2012.

Navajo Nation Oil and Gas Company acquired 5% stake in Aneth Field in the Paradox Basin from Resolute Energy Corporation for $45 million in cash on July 2, 2012.

Navajo Nation Oil and Gas Company completed the acquisition of 10% stake in Aneth Field in the Paradox Basin from Resolute Energy Corporation (NYSE:REN) for $93 million on January 18, 2013. Resolute received approximately $48 million for the second 5% interest transfer.