| 708912 | Jan 21, 2011 | Jan 21, 2011 | Laredo Petroleum, Inc. | Currie Trust 6 #1 | 9,900 | 17333991 |
| 708739 | Jan 21, 2011 | Jan 21, 2011 | Nadel and Gussman Permian,l.l.c. | Vaqueros 26 #1 | 10,000 | 17333990 |
| 708693 | Jan 20, 2011 | Jan 20, 2011 | Pioneer Natural Res. USA, Inc. | Houston, Fred 'B' #2 | 10,600 | 17333988 |
| 708685 | Jan 20, 2011 | Jan 20, 2011 | Apache Corporation | Rooster 17 #1 | 10,450 | 17333987 |
| 708685Amendment | Jan 20, 2011 | Jan 20, 2011 | Apache Corporation | Rooster 17 #1 | 10,450 | 17333987 |
| 708663 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Guadalupe -48- #3 | 11,000 | 17333984 |
| 708660 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Guadalupe -48- #2 | 11,000 | 17333983 |
| 708656 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Guadalupe -48- #1 | 11,000 | 17333982 |
| 708655 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Colorado #5 | 11,000 | 17333981 |
| 708655Amendment | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Colorado #5 | 11,000 | 17333981 |
| 708652 | Jan 20, 2011 | Jan 20, 2011 | Pioneer Natural Res. USA, Inc. | Weyman '23' #3 | 10,650 | 17333985 |
| 708650 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Colorado #4 | 11,000 | 17333979 |
| 708645 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Colorado #3 | 11,000 | 17333978 |
| 708634 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Colorado #2 | 11,000 | 17333977 |
| 708629 | Jan 20, 2011 | Jan 20, 2011 | Apache Corporation | Runner 17 #1 | 10,450 | 17333980 |
| 708629Amendment | Jan 20, 2011 | Jan 20, 2011 | Apache Corporation | Runner 17 #1 | 10,450 | 17333980 |
| 708619 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Canadian #2 | 11,000 | 17333975 |
| 708618 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Brazos #2 | 11,000 | 17333974 |
| 708614 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Neches -15- #2 | 11,000 | 17333973 |
| 708614Amendment | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Neches -15- #2 | 11,000 | 17333973 |
| 708613 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Neches -15- #1 | 11,000 | 17333972 |
| 708613Amendment | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | Neches -15- #1 | 11,000 | 17333972 |
| 708612 | Jan 20, 2011 | Jan 20, 2011 | Energen Resources Corporation | San Antonio -14- #1 | 11,000 | 17333976 |
| 708596 | Jan 19, 2011 | Jan 19, 2011 | Parsley Energy Operations, LLC | Hoelscher "35" #2 | 11,600 | 17333971 |
| 708596Amendment | Jan 19, 2011 | Jan 19, 2011 | Parsley Energy Operations, LLC | Hoelscher '35' #2 | 11,600 | 17333971 |
| 708336 | Jan 18, 2011 | Jan 18, 2011 | Apache Corporation | Brenda 8 #1 | 11,100 | 17333957 |
| 708336Amendment | Jan 18, 2011 | Jan 18, 2011 | Apache Corporation | Brenda 8 #1 | 11,100 | 17333957 |
| 708477 | Jan 14, 2011 | Jan 14, 2011 | Parsley Energy Operations, LLC | Hoelshcer "35" #3 | 11,600 | 17333969 |
| 708477Amendment | Jan 14, 2011 | Jan 14, 2011 | Parsley Energy Operations, LLC | Hoelshcer '35' #3 | 11,600 | 17333969 |
| 708460 | Jan 14, 2011 | Jan 14, 2011 | Broad Oak Energy, Inc. | Fuchs- #39O | 10,600 | 17333967 |
| 708423 | Jan 14, 2011 | Jan 14, 2011 | Laredo Petroleum, Inc. | Currie Ranch 21 #1 | 9,700 | 17333966 |
| 708378 | Jan 14, 2011 | Jan 14, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #1077W | 3,200 | 17333963 |
| 708378Amendment | Jan 14, 2011 | Jan 14, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #1077W | 3,200 | 17333963 |
| 708371 | Jan 14, 2011 | Jan 14, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #8026W | 3,200 | 17333962 |
| 708367 | Jan 14, 2011 | Jan 14, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #8025W | 3,200 | 17333965 |
| 708363 | Jan 14, 2011 | Jan 14, 2011 | Apache Corporation | Nester 10 #1 | 10,400 | 17333961 |
| 708363Amendment | Jan 14, 2011 | Jan 14, 2011 | Apache Corporation | Nester 10 #1 | 10,400 | 17333961 |
| 708361 | Jan 14, 2011 | Jan 14, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #8032W | 3,200 | 17333960 |
| 708361Amendment | Jan 14, 2011 | Jan 14, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #8032W | 3,200 | 17333960 |
| 708357 | Jan 14, 2011 | Jan 14, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #503 | 3,200 | 17333959 |
| 708351 | Jan 14, 2011 | Jan 14, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #8033W | 3,200 | 17333964 |
| 708354 | Jan 13, 2011 | Jan 13, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #1076W | 3,200 | 17333958 |
| 708354Amendment | Jan 13, 2011 | Jan 13, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #1076W | 3,200 | 17333958 |
| 708313 | Jan 13, 2011 | Jan 13, 2011 | Pioneer Natural Res. USA, Inc. | Brunson '35' #1 | 10,750 | 17333956 |
| 708123 | Jan 13, 2011 | Jan 13, 2011 | Laredo Petroleum, Inc. | Bearkat #802HH | 9,300 | 17333954 |
| 708123Amendment | Jan 13, 2011 | Jan 13, 2011 | Laredo Petroleum, Inc. | Bearkat #802HH | 9,750 | 17333954 |
| 707325 | Jan 13, 2011 | Jan 13, 2011 | Energen Resources Corporation | Cole Ranch -35- #4406 | 12,000 | 17333898 |
| 708258 | Jan 12, 2011 | Jan 12, 2011 | Piedra Operating, LLC | Blalock F #112 | 11,500 | 17333953 |
| 708258Amendment | Jan 12, 2011 | Jan 12, 2011 | Berry Oil Comp. | Blalock F #112 | 11,500 | 17333953 |
| 708003 | Jan 12, 2011 | Jan 12, 2011 | Laredo Petroleum, Inc. | J. E. Cox #3202 | 10,100 | 17333947 |
| 708003Amendment | Jan 12, 2011 | Jan 12, 2011 | Laredo Petroleum, Inc. | J. E. Cox #3202 | 10,500 | 17333947 |
| 707850 | Jan 12, 2011 | Jan 12, 2011 | Orbit Crude, Inc. | Mollie #2 | 9,600 | 17333955 |
| 707850Amendment | Jan 12, 2011 | Jan 12, 2011 | Energen Resources Corporation | Mollie #2 | 9,600 | 17333955 |
| 708209 | Jan 11, 2011 | Jan 11, 2011 | Element Petroleum Operating, LLC | Lawson #2101 | 11,000 | 17333952 |
| 708189 | Jan 11, 2011 | Jan 11, 2011 | Laredo Petroleum, Inc. | Driver 44 #1 | 9,900 | 17333950 |
| 708188 | Jan 11, 2011 | Jan 11, 2011 | Laredo Petroleum, Inc. | J. E. Cox #3302 | 10,100 | 17333949 |
| 708188Amendment | Jan 11, 2011 | Jan 11, 2011 | Laredo Petroleum, Inc. | J. E. Cox #3302 | 10,100 | 17333949 |
| 708188Amendment | Jan 11, 2011 | Jan 11, 2011 | Laredo Petroleum, Inc. | J. E. Cox #3302 | 10,500 | 17333949 |
| 708180 | Jan 11, 2011 | Jan 11, 2011 | Laredo Petroleum, Inc. | Lacy Creek 24 #1 | 9,650 | 17333948 |
| 708180Amendment | Jan 11, 2011 | Jan 11, 2011 | Laredo Petroleum, Inc. | Lacy Creek 24 #1 | 9,900 | 17333948 |
| 708129 | Jan 11, 2011 | Jan 11, 2011 | Apache Corporation | Hartley 38 #3 | 10,000 | 17333946 |
| 708129Amendment | Jan 11, 2011 | Jan 11, 2011 | Apache Corporation | Hartley 38 #3 | 10,900 | 17333946 |
| 708129Amendment | Jan 11, 2011 | Jan 11, 2011 | Apache Corporation | Hartley 38 #3 | 10,900 | 17333946 |
| 708127 | Jan 11, 2011 | Jan 11, 2011 | Broad Oak Energy, Inc. | Fuchs-A- #47J | 10,500 | 17333945 |
| 708097 | Jan 10, 2011 | Jan 10, 2011 | Apache Corporation | Tigershark 54A #3 | 10,300 | 17333944 |
| 708097Amendment | Jan 10, 2011 | Jan 10, 2011 | Apache Corporation | Tigershark 54A #3 | 10,300 | 17333944 |
| 708075 | Jan 10, 2011 | Jan 10, 2011 | McClure Oil Company, Inc. | Moc-Seidenberger '29' #1 | 5,400 | 17333943 |
| 708075Amendment | Jan 10, 2011 | Jan 10, 2011 | McClure Oil Company, Inc. | Moc-Seidenberger '29' #1 | 5,400 | 17333943 |
| 708075Amendment | Jan 10, 2011 | Jan 10, 2011 | McClure Oil Company, Inc. | Moc-Seidenberger '29' #1 | 5,400 | 17333943 |
| 708062 | Jan 10, 2011 | Jan 10, 2011 | Pioneer Natural Res. USA, Inc. | Mills '37B' #3 | 10,675 | 17333942 |
| 708053 | Jan 10, 2011 | Jan 10, 2011 | Apache Corporation | Phillips 57 #2 | 10,300 | 17333941 |
| 708053Amendment | Jan 10, 2011 | Jan 10, 2011 | Apache Corporation | Phillips 57 #2 | 10,300 | 17333941 |
| 708034 | Jan 10, 2011 | Jan 10, 2011 | McClure Oil Company, Inc. | Driver '33' #1 | 5,300 | 17333940 |
| 708034Amendment | Jan 10, 2011 | Jan 10, 2011 | McClure Oil Company, Inc. | Driver '33' #1 | 5,300 | 17333940 |
| 708001 | Jan 7, 2011 | Jan 7, 2011 | Laredo Petroleum, Inc. | Calverley 44 #1 | 9,900 | 17333939 |
| 707998 | Jan 7, 2011 | Jan 7, 2011 | Apache Corporation | Mackerel 2 #2 | 10,300 | 17333938 |
| 707998Amendment | Jan 7, 2011 | Jan 7, 2011 | Apache Corporation | Mackerel 2 #2 | 10,300 | 17333938 |
| 707962 | Jan 7, 2011 | Jan 7, 2011 | Apache Corporation | Mackerel 24B #2 | 10,300 | 17333937 |
| 707962Amendment | Jan 7, 2011 | Jan 7, 2011 | Apache Corporation | Mackerel 24B #2 | 10,300 | 17333937 |
| 707831 | Jan 7, 2011 | Jan 7, 2011 | Element Petroleum Operating, LLC | Cooper 34 #3 | 11,000 | 17333932 |
| 707940 | Jan 6, 2011 | Jan 6, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #402 | 3,200 | 17333933 |
| 707935 | Jan 6, 2011 | Jan 6, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #703 | 3,200 | 17333931 |
| 707919Amendment | Jan 6, 2011 | Jan 6, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #8028 | 3,200 | 17334059 |
| 707893 | Jan 6, 2011 | Jan 6, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #1079W | 3,200 | 17333930 |
| 707893Amendment | Jan 6, 2011 | Jan 6, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #1079W | 3,200 | 17333930 |
| 707876 | Jan 6, 2011 | Jan 6, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #1033RW | 3,200 | 17333929 |
| 707872 | Jan 6, 2011 | Jan 6, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #1082W | 3,200 | 17333928 |
| 707804 | Jan 5, 2011 | Jan 5, 2011 | Energen Resources Corporation | Frio #2 | 11,000 | 17333926 |
| 707780 | Jan 5, 2011 | Jan 5, 2011 | Thompson, J. Cleo | Abel #5 | 10,500 | 17333924 |
| 707742 | Jan 5, 2011 | Jan 5, 2011 | Apache Corporation | Phillips 58 #1 | 10,300 | 17333922 |
| 707742Amendment | Jan 5, 2011 | Jan 5, 2011 | Apache Corporation | Phillips 58 #1 | 10,300 | 17333922 |
| 707859 | Jan 4, 2011 | Jan 4, 2011 | Laredo Petroleum, Inc. | Lacy Creek 34 #1 | 9,650 | 17333927 |
| 707803 | Jan 4, 2011 | Jan 4, 2011 | Energen Resources Corporation | Pecos -42- #1 | 11,000 | 17333925 |
| 707408 | Jan 4, 2011 | Jan 4, 2011 | Conocophillips Company | Overton, B. -A- #32 | 3,400 | 17335400 |
| 707765 | Jan 3, 2011 | Jan 3, 2011 | Nadel and Gussman Permian,l.l.c. | Red Devil 24 #1 | 9,650 | 17333923 |
| 703579 | Jan 3, 2011 | Jan 3, 2011 | XTO Energy Inc. | Glasscock N Fee #11 | 8,500 | 17333802 |
| 707702 | Dec 30, 2010 | Dec 30, 2010 | Apache Corporation | Lee 59 #3 | 10,300 | 17333921 |
| 707702Amendment | Dec 30, 2010 | Dec 30, 2010 | Apache Corporation | Lee 59 #3 | 10,300 | 17333921 |
| 707682 | Dec 30, 2010 | Dec 30, 2010 | Laredo Petroleum, Inc. | Ratliff 17 #4 | 9,800 | 17333920 |
| 707682Amendment | Dec 30, 2010 | Dec 30, 2010 | Laredo Petroleum, Inc. | Ratliff 17 a Unit #4 | 9,900 | 17333920 |