Rex Energy Corporation reported total estimated proved reserves as of June 30, 2014 of 1,057.8 Bcfe, an increase of approximately 208.0 Bcfe, or 24%, from total estimated proved reserves reported at year-end 2013.

The estimated proved developed portion of the reserves as of June 30, 2014 increased approximately 90.7 Bcfe, or 25%, from proved developed reserves as of December 31, 2013. In addition, the company's PV-10 (a non-GAAP measure of estimated future cash flows, excluding income taxes, discounted at 10%) increased approximately $372.4 million, or 56% to $1.041 billion, from year-end 2013 PV-10 of $668.7 million.

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