(a) Financial Statements of Businesses Acquired.

• Titan Operating, LLC unaudited balance sheets as of June 30, 2012 and December 31, 2011, and statements of operations, members' equity and cash flows for the six months ended June 30, 2012 and 2011 are filed as Exhibit 99.1 to this Current Report on Form 8-K/A and are incorporated by reference herein.

• Titan Operating, LLC audited balance sheets as of December 31, 2011 and 2010, and statements of operations, members' equity and cash flows for the years ended December 31, 2011 and 2010, together with independent auditors' report thereon, are filed as Exhibit 99.2 to this Current Report on Form 8-K/A and are incorporated by reference herein.

• Titan Operating, LLC audited balance sheets as of December 31, 2010 and 2009, and statements of operations, members' equity and cash flows for the years ended December 31, 2010 and 2009, together with independent auditors' report thereon, are filed as Exhibit 99.3 to this Current Report on Form 8-K/A and are incorporated by reference herein.

• Titan Operating, LLC unaudited supplemental oil and gas disclosures for the years ended December 31, 2011, 2010 and 2009 are filed as Exhibit 99.4 to this Current Report on Form 8-K/A and are incorporated by reference herein.

(b) Pro Forma Financial Information

The unaudited pro forma consolidated balance sheet of ATLS as of June 30, 2012, and the related pro forma consolidated statements of income for the six months ended June 30, 2012 and the year ended December 31, 2011 are filed as Exhibit 99.5 to this Current Report on Form 8-K/A and are incorporated by reference herein.

23.1    Consent of Rylander, Clay & Opitz, LLP

99.1    Titan Operating, LLC unaudited balance sheets as of June 30, 2012 and
        December 31, 2011, and statements of operations, members' equity and cash
        flows for the six months ended June 30, 2012 and 2011

99.2    Titan Operating, LLC audited balance sheets as of December 31, 2011 and
        2010, and statements of operations, members' equity and cash flows for the
        years ended December 31, 2011 and 2010

99.3    Titan Operating, LLC audited balance sheets as of December 31, 2010 and
        2009, and statements of operations, members' equity and cash flows for the
        years ended December 31, 2010 and 2009

99.4    Titan Operating, LLC unaudited supplemental oil and gas disclosures for
        the years ended December 31, 2011, 2010 and 2009

99.5    Unaudited pro forma consolidated financial statements