| 716798 | May 20, 2011 | May 20, 2011 | Laredo Petroleum, Inc. | Zebu #2102 | 11,000 | 17334216 |
| 716768 | May 20, 2011 | May 20, 2011 | Laredo Petroleum, Inc. | Birdie Mae 12 #3 | 11,000 | 17334213 |
| 716758 | May 20, 2011 | May 20, 2011 | Laredo Petroleum, Inc. | Lazy E 20 #1 | 11,000 | 17334212 |
| 716758Amendment | May 20, 2011 | May 20, 2011 | Laredo Petroleum, Inc. | Lazy E 20 #1 | 11,000 | 17334212 |
| 716708 | May 20, 2011 | May 20, 2011 | Laredo Petroleum, Inc. | Lazy E 14 #1 | 11,000 | 17334209 |
| 716708Amendment | May 20, 2011 | May 20, 2011 | Laredo Petroleum, Inc. | Lazy E 14 #1 | 11,000 | 17334209 |
| 716610 | May 19, 2011 | May 19, 2011 | Apache Corporation | Ballenger #4202 | 11,000 | 17334202 |
| 716436 | May 18, 2011 | May 18, 2011 | Athlon Energy Operating LLC | Buckner Baptist Benevolences #8 | 11,350 | 17334197 |
| 716436Amendment | May 18, 2011 | May 18, 2011 | Athlon Energy Operating LLC | Buckner Baptist Benevolences #8 | 11,350 | 17334197 |
| 716436Amendment | May 18, 2011 | May 18, 2011 | Athlon Holdings LP | Buckner Baptist Benevolences #8 | 11,350 | 17334197 |
| 716383 | May 18, 2011 | May 18, 2011 | Pioneer Natural Res. USA, Inc. | Wood Family '28' #2 | 10,650 | 17334196 |
| 716383Amendment | May 18, 2011 | May 18, 2011 | Pioneer Natural Res. USA, Inc. | Wood Family '28' #2 | 10,650 | 17334196 |
| 716356 | May 18, 2011 | May 18, 2011 | McClure Oil Company, Inc. | Moc-Seidenberger '29' #2 | 5,300 | 17334198 |
| 716356Amendment | May 18, 2011 | May 18, 2011 | McClure Oil Company, Inc. | Moc-Seidenberger '29' #2 | 5,300 | 17334198 |
| 716356Amendment | May 18, 2011 | May 18, 2011 | McClure Oil Company, Inc. | Moc-Seidenberger '29' #2 | 5,300 | 17334198 |
| 716157 | May 18, 2011 | May 18, 2011 | Apache Corporation | Weaver 23 #1 | 10,298 | 17333558 |
| 714464 | May 18, 2011 | May 18, 2011 | Energen Resources Corporation | Thomason -D- #8 | 11,000 | 17334138 |
| 716363 | May 17, 2011 | May 17, 2011 | McClure Oil Company, Inc. | Driver '33' #2 | 5,300 | 17334195 |
| 716025 | May 17, 2011 | May 17, 2011 | Fivestones Energy LLC | Connally '43' #1 | 11,000 | 17334194 |
| 715969 | May 17, 2011 | May 17, 2011 | Crownquest Operating, LLC | Smith 7 #1 | 11,900 | 17334193 |
| 715959 | May 17, 2011 | May 17, 2011 | Pioneer Natural Res. USA, Inc. | Brunson '24' #5 | 10,600 | 17334192 |
| 716153 | May 16, 2011 | May 16, 2011 | Apache Corporation | Lynda #2801 | 10,352 | 17333456 |
| 716062 | May 12, 2011 | May 12, 2011 | Pioneer Natural Res. USA, Inc. | Corson 'B5' #1 | 10,700 | 17334191 |
| 714606 | May 11, 2011 | May 11, 2011 | Apache Corporation | Wahoo 20 #5 | 11,000 | 17334155 |
| 715834 | May 10, 2011 | May 10, 2011 | Laredo Petroleum, Inc. | Bell 18 #1HH | 11,000 | 17334187 |
| 715806 | May 10, 2011 | May 10, 2011 | Pioneer Natural Res. USA, Inc. | Cook, E '17' #3 | 10,700 | 17334189 |
| 715805 | May 10, 2011 | May 10, 2011 | Pioneer Natural Res. USA, Inc. | Brunson '35' #2 | 10,800 | 17334188 |
| 714087 | May 10, 2011 | May 10, 2011 | Energen Resources Corporation | Thomason -D- #7 | 11,000 | 17334128 |
| 714075 | May 10, 2011 | May 10, 2011 | Energen Resources Corporation | Thomason -D- #6 | 11,000 | 17334129 |
| 715730 | May 9, 2011 | May 9, 2011 | Pioneer Natural Res. USA, Inc. | Corson 'B5' #3 | 10,675 | 17334185 |
| 715729 | May 9, 2011 | May 9, 2011 | Apache Corporation | Newell 12 #2 | 11,000 | 17334184 |
| 715723 | May 9, 2011 | May 9, 2011 | Laredo Petroleum, Inc. | Currie Trust 33 #6HH | 11,000 | 17334186 |
| 715681 | May 9, 2011 | May 9, 2011 | Broad Oak Energy, Inc. | Barbee-A- #38B | 10,500 | 17334183 |
| 715658 | May 9, 2011 | May 9, 2011 | Laredo Petroleum, Inc. | Lazy E #902 | 11,000 | 17334182 |
| 715658Amendment | May 9, 2011 | May 9, 2011 | Laredo Petroleum, Inc. | Lazy E #902 | 11,000 | 17334182 |
| 715518 | May 5, 2011 | May 5, 2011 | Apache Corporation | Gray 24 #6 | 11,000 | 17334181 |
| 715475 | May 5, 2011 | May 5, 2011 | Element Petroleum Operating, LLC | Lawson 14 A #1 | 11,000 | 17334180 |
| 714757 | May 5, 2011 | May 5, 2011 | Apache Corporation | Cook 21 #1 | 10,759 | 17333682 |
| 715349 | May 4, 2011 | May 4, 2011 | Broad Oak Energy, Inc. | Barbee-B- #5I | 10,500 | 17334178 |
| 715349Amendment | May 4, 2011 | May 4, 2011 | Laredo Petroleum - Dallas, Inc. | Barbee-B- #5I | 10,500 | 17334178 |
| 715110 | May 4, 2011 | May 4, 2011 | Pioneer Natural Res. USA, Inc. | Stone '45' #1 | 10,200 | 17333342 |
| 715087 | May 4, 2011 | May 4, 2011 | Crownquest Operating, LLC | Hipp 23 #1 | 11,500 | 17334176 |
| 715087Amendment | May 4, 2011 | May 4, 2011 | Crownquest Operating, LLC | Hipp 23 #1 | 11,900 | 17334176 |
| 715433 | May 3, 2011 | May 3, 2011 | Nadel and Gussman Permian,l.l.c. | Vaqueros 26 #1R | 10,500 | 17334175 |
| 714706 | May 3, 2011 | May 3, 2011 | Energen Resources Corporation | Llano -8A- #1 | 11,000 | 17334164 |
| 708479 | May 3, 2011 | May 3, 2011 | Parsley Energy Operations, LLC | Hoelscher "35" #1 | 11,600 | 17333968 |
| 708479Amendment | May 3, 2011 | May 3, 2011 | Parsley Energy Operations, LLC | Hoelscher '35' #1 | 11,600 | 17333968 |
| 715170 | May 2, 2011 | May 2, 2011 | Apache Corporation | Betty JO 39 #3 | 11,000 | 17334174 |
| 714806 | May 2, 2011 | May 2, 2011 | Apache Corporation | Lizardfish 27 #1 | 10,691 | 17333737 |
| 714707 | May 2, 2011 | May 2, 2011 | Energen Resources Corporation | Lavaca -38- #2 | 11,000 | 17334165 |
| 714345 | May 2, 2011 | May 2, 2011 | Spiral Energy Corp. | Garden City "40" #4 | 11,000 | 17334146 |
| 714345Amendment | May 2, 2011 | May 2, 2011 | Encana Oil & Gas(usa) Inc. | Garden City '40' #4 | 11,000 | 17334146 |
| 714918 | Apr 29, 2011 | Apr 29, 2011 | Pioneer Natural Res. USA, Inc. | Winslow '25' #1 | 10,500 | 17334173 |
| 714826 | Apr 28, 2011 | Apr 28, 2011 | Apache Corporation | Books, Ed 11 #5 | 11,000 | 17334172 |
| 714824 | Apr 28, 2011 | Apr 28, 2011 | Energen Resources Corporation | Neches -15A- #1 | 11,000 | 17334170 |
| 714822 | Apr 28, 2011 | Apr 28, 2011 | Energen Resources Corporation | Sabine -35A- #1 | 11,000 | 17334171 |
| 714821 | Apr 27, 2011 | Apr 27, 2011 | Energen Resources Corporation | Guadalupe -48- #4 | 11,000 | 17334169 |
| 714802 | Apr 27, 2011 | Apr 27, 2011 | Apache Corporation | Schwartz #2 | 10,645 | 17333734 |
| 714754 | Apr 27, 2011 | Apr 27, 2011 | Apache Corporation | Copeland 27 #1 | 10,795 | 17333645 |
| 714662 | Apr 27, 2011 | Apr 27, 2011 | Energen Resources Corporation | Epo #1 Daniel Unit #3 | 11,000 | 17334158 |
| 714744 | Apr 26, 2011 | Apr 26, 2011 | Energen Resources Corporation | Llano -8- #2 | 11,000 | 17334167 |
| 714742 | Apr 26, 2011 | Apr 26, 2011 | Energen Resources Corporation | Neal #3 | 11,000 | 17334168 |
| 714709 | Apr 26, 2011 | Apr 26, 2011 | Energen Resources Corporation | Lavaca -38A- #2 | 11,000 | 17334166 |
| 714704 | Apr 26, 2011 | Apr 26, 2011 | Energen Resources Corporation | Canadian #3 | 11,000 | 17334163 |
| 714703 | Apr 26, 2011 | Apr 26, 2011 | Laredo Petroleum, Inc. | Roberts-Schafer 10 #1 | 11,000 | 17334162 |
| 714661 | Apr 26, 2011 | Apr 26, 2011 | Energen Resources Corporation | Epo #1 Daniel Unit #2 | 11,000 | 17334160 |
| 714659 | Apr 26, 2011 | Apr 26, 2011 | Energen Resources Corporation | Daniel -7- #3 | 11,000 | 17334161 |
| 714657 | Apr 26, 2011 | Apr 26, 2011 | Energen Resources Corporation | Daniel -7- #2 | 11,000 | 17334159 |
| 714656 | Apr 26, 2011 | Apr 26, 2011 | Energen Resources Corporation | Daniel Unit -3- #2 | 11,000 | 17334157 |
| 714590 | Apr 22, 2011 | Apr 22, 2011 | Apache Corporation | Sharptooth 224 #1 | 10,000 | 17334154 |
| 714581 | Apr 22, 2011 | Apr 22, 2011 | Energen Resources Corporation | San Saba #2 | 11,000 | 17334153 |
| 714580 | Apr 22, 2011 | Apr 22, 2011 | Energen Resources Corporation | San Saba -A- #1 | 11,000 | 17334152 |
| 714579 | Apr 22, 2011 | Apr 22, 2011 | Energen Resources Corporation | Blanco -29- #1 | 11,000 | 17334151 |
| 714576 | Apr 22, 2011 | Apr 22, 2011 | Energen Resources Corporation | Trinity -16- #2 | 11,000 | 17334150 |
| 714569 | Apr 22, 2011 | Apr 22, 2011 | Energen Resources Corporation | Llano -8- #1 | 11,000 | 17334149 |
| 714568 | Apr 22, 2011 | Apr 22, 2011 | Energen Resources Corporation | Lavaca -38- #1 | 11,000 | 17334148 |
| 714574 | Apr 21, 2011 | Apr 21, 2011 | Energen Resources Corporation | Lavaca -38A- #1 | 11,000 | 17334145 |
| 714505 | Apr 21, 2011 | Apr 21, 2011 | Apache Corporation | E D Books 17 #4 | 11,000 | 17334144 |
| 714496 | Apr 21, 2011 | Apr 21, 2011 | Apache Corporation | E D Books 17 #3 | 11,000 | 17334143 |
| 714481 | Apr 21, 2011 | Apr 21, 2011 | Apache Corporation | Books, Ed 11 #4 | 11,000 | 17334142 |
| 714468 | Apr 21, 2011 | Apr 21, 2011 | Energen Resources Corporation | Daniel Unit -2- #3 | 11,000 | 17334141 |
| 714467 | Apr 21, 2011 | Apr 21, 2011 | Energen Resources Corporation | Daniel Unit -2- #2 | 11,000 | 17334140 |
| 714465 | Apr 21, 2011 | Apr 21, 2011 | Energen Resources Corporation | Daniel Unit -4- #2 | 11,000 | 17334139 |
| 714284 | Apr 21, 2011 | Apr 21, 2011 | Energen Resources Corporation | Colorado #1 | 11,000 | 17333661 |
| 712854 | Apr 21, 2011 | Apr 21, 2011 | Adventure Exploration Ptrs, LLC | Weaver #5 | 10,900 | 17334147 |
| 712854Amendment | Apr 21, 2011 | Apr 21, 2011 | Adventure Exploration Ptrs, LLC | Weaver #5 | 10,900 | 17334147 |
| 714100 | Apr 19, 2011 | Apr 19, 2011 | Apache Corporation | Weaver 23 #5 | 11,000 | 17334132 |
| 714019 | Apr 19, 2011 | Apr 19, 2011 | Pioneer Natural Res. USA, Inc. | Tom 'E' #1 | 10,750 | 17334137 |
| 714278 | Apr 18, 2011 | Apr 18, 2011 | Apache Corporation | Mack 5 #1 | 11,000 | 17334136 |
| 714267 | Apr 18, 2011 | Apr 18, 2011 | Broad Oak Energy, Inc. | Frysak-A- #47I | 10,800 | 17334135 |
| 714170 | Apr 15, 2011 | Apr 15, 2011 | Apache Corporation | Hartley 38 #4 | 11,000 | 17334133 |
| 714098 | Apr 15, 2011 | Apr 15, 2011 | Apache Corporation | Fuller 43 #2 | 11,000 | 17334130 |
| 714098Amendment | Apr 15, 2011 | Apr 15, 2011 | Apache Corporation | Fuller 43 #2 | 11,000 | 17334130 |
| 714067 | Apr 15, 2011 | Apr 15, 2011 | Apache Corporation | Mack 6 #1 | 11,000 | 17334134 |
| 714047 | Apr 15, 2011 | Apr 15, 2011 | Pioneer Natural Res. USA, Inc. | Wood Family '28' #1R | 10,575 | 17334131 |
| 714046 | Apr 15, 2011 | Apr 15, 2011 | Apache Corporation | Lizardfish 27 #2 | 11,000 | 17334127 |
| 714003 | Apr 15, 2011 | Apr 15, 2011 | Apache Corporation | Chucker 20A #3 | 11,000 | 17334126 |
| 713882 | Apr 13, 2011 | Apr 13, 2011 | Adventure Exploration Ptrs, LLC | Ratliff "A" #1 | 10,900 | 17334124 |
| 713882Amendment | Apr 13, 2011 | Apr 13, 2011 | Bluestem Energy Holdings, LLC | Ratliff 'A' #1 | 11,000 | 17334124 |
| 713880 | Apr 13, 2011 | Apr 13, 2011 | Adventure Exploration Ptrs, LLC | Ratliff "B" #1 | 10,900 | 17334123 |