9999999997-13-009883 ARS 1 20121231 20130523 20130524 20130523 Diamondback Energy, Inc. 0001539838 1311 000000000 DE 1231 ARS 34 001-35700 13002485 500 WEST TEXAS SUITE 1210 MIDLAND TX 79701 405-463-6900 14301 CALIBER DRIVE SUITE 300 OKLAHOMA CITY OK 73134 ARS 1 9999999997-13-009883.paper AUTO-GENERATED PAPER DOCUMENT