| 641669Amendment | Jul 12, 2007 | Jul 12, 2007 | Killam Oil Co., Ltd. | Vaquillas Borrego #27 | 8,875 | 47939882 |
| 641669Amendment | Jul 12, 2007 | Jul 12, 2007 | Killam Oil Co., Ltd. | Vaquillas Borrego #27 | 10,200 | 47939882 |
| 641663 | Jul 12, 2007 | Jul 12, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #271 | 8,900 | 47939881 |
| 641541 | Jul 11, 2007 | Jul 11, 2007 | Lewis Petro Properties, Inc. | Gates "N" TR1 #9 | 6,000 | 47939880 |
| 641535 | Jul 10, 2007 | Jul 10, 2007 | Lewis Petro Properties, Inc. | Beasley Welhausen State 105 #45 | 7,200 | 47939879 |
| 640521 | Jul 9, 2007 | Jul 9, 2007 | Cummins & Walker Oil Co., Inc. | Moos Heirs #5 | 8,400 | 47939878 |
| 640521Amendment | Jul 9, 2007 | Jul 9, 2007 | Dewbre Petroleum Corporation | Moos Heirs #5 | 8,400 | 47939878 |
| 641482 | Jul 6, 2007 | Jul 6, 2007 | Lewis Petro Properties, Inc. | Beasley Welhausen State 104 #65 | 7,200 | 47939877 |
| 641481 | Jul 6, 2007 | Jul 6, 2007 | Lewis Petro Properties, Inc. | Beasley Welhausen State 105 #74 | 7,200 | 47939876 |
| 641391 | Jul 6, 2007 | Jul 6, 2007 | Eagle Oil & Gas Co. | Villarreal #2 | 13,000 | 47939875 |
| 641378 | Jul 6, 2007 | Jul 6, 2007 | Middleton Oil Company | Triphene Middleton "D" #3 | 7,000 | 47939874 |
| 641371 | Jul 6, 2007 | Jul 6, 2007 | Laredo Energy | Vergara #1 | 11,500 | 47939873 |
| 641371Amendment | Jul 6, 2007 | Jul 6, 2007 | Laredo Energy | Vergara #1 | 11,500 | 47939873 |
| 641278 | Jul 3, 2007 | Jul 3, 2007 | St. Mary Land & Exploration Co. | Petty Ranch #5011 | 5,500 | 47939872 |
| 641036 | Jul 3, 2007 | Jul 3, 2007 | Edge Petroleum Oper. Co., Inc. | Lundell Ranch #23 | 11,200 | 47939870 |
| 641036Amendment | Jul 3, 2007 | Jul 3, 2007 | Edge Petroleum Oper. Co., Inc. | Lundell Ranch #23 | 11,200 | 47939870 |
| 641036Amendment | Jul 3, 2007 | Jul 3, 2007 | Edge Petroleum Oper. Co., Inc. | Lundell Ranch #23 | 11,700 | 47939870 |
| 640930 | Jun 29, 2007 | Jun 29, 2007 | Awp Operating Company | Booth, W. V. #15 | 6,850 | 47939871 |
| 640954 | Jun 28, 2007 | Jun 28, 2007 | Lewis Petro Properties, Inc. | Meador State #20 | 7,200 | 47939869 |
| 640913 | Jun 28, 2007 | Jun 28, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #269 | 9,350 | 47939868 |
| 640549 | Jun 21, 2007 | Jun 21, 2007 | Lewis Petro Properties, Inc. | Beasley Welhausen State 105 #43 | 7,200 | 47939867 |
| 640493 | Jun 20, 2007 | Jun 20, 2007 | Conocophillips Company | BMT B TR5 #11 | 7,100 | 47939866 |
| 640493Amendment | Jun 20, 2007 | Jun 20, 2007 | Conocophillips Company | BMT B TR5 #11 | 7,100 | 47939866 |
| 640474 | Jun 19, 2007 | Jun 19, 2007 | Lewis Petro Properties, Inc. | Meador State #16 | 7,200 | 47939865 |
| 640346 | Jun 15, 2007 | Jun 15, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #270 | 8,500 | 47939864 |
| 640319 | Jun 15, 2007 | Jun 15, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #9 | 7,800 | 47939863 |
| 640125 | Jun 12, 2007 | Jun 12, 2007 | EOG Resources, Inc. | Slator Ranch #E 2 | 12,000 | 47939862 |
| 640109 | Jun 12, 2007 | Jun 12, 2007 | Conocophillips Company | Carr #148 | 10,100 | 47939861 |
| 640003 | Jun 11, 2007 | Jun 11, 2007 | Killam Oil Co., Ltd. | Martin, J. C., III #9 | 11,000 | 47939860 |
| 640002 | Jun 11, 2007 | Jun 11, 2007 | Ricochet Energy, Inc. | Las Blancas #2 | 10,000 | 47939859 |
| 639795 | Jun 6, 2007 | Jun 6, 2007 | EOG Resources, Inc. | Cabezon #9HH | 11,000 | 47939858 |
| 639630 | May 31, 2007 | May 31, 2007 | Killam Oil Co., Ltd. | Puig #5 | 11,000 | 47939857 |
| 639486 | May 29, 2007 | May 29, 2007 | EOG Resources, Inc. | Benavides, Arturo-State #3 | 13,500 | 47939856 |
| 639499 | May 25, 2007 | May 25, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #267 | 9,900 | 47939855 |
| 639494 | May 25, 2007 | May 25, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #264 | 10,000 | 47939854 |
| 639223 | May 25, 2007 | May 25, 2007 | Blackbrush O & G, Inc. | Brask Ranch #27 | 5,800 | 47939848 |
| 639223Amendment | May 25, 2007 | May 25, 2007 | St. Mary Land & Exploration Co. | Brask State 1846 #8 | 5,800 | 47939848 |
| 639388 | May 24, 2007 | May 24, 2007 | Blackbrush O & G, Inc. | Petty Ranch #7013 | 5,700 | 47939852 |
| 639384 | May 24, 2007 | May 24, 2007 | Blackbrush O & G, Inc. | Petty Ranch #1216 | 5,500 | 47939851 |
| 639345 | May 24, 2007 | May 24, 2007 | Laredo Energy | BMT #1 | 12,000 | 47939853 |
| 639328 | May 24, 2007 | May 24, 2007 | Chesapeake Operating, Inc. | Bruni Mineral Trust "A" #50 | 12,000 | 47939850 |
| 639280 | May 23, 2007 | May 23, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #268 | 9,000 | 47939849 |
| 638869 | May 22, 2007 | May 22, 2007 | Conocophillips Company | Vaquillas Ranch A6 #228 | 12,900 | 47939843 |
| 637311 | May 22, 2007 | May 22, 2007 | Killam Oil Co., Ltd. | Bruni Mineral "D" #1 | 10,156 | 47932636 |
| 639108 | May 21, 2007 | May 21, 2007 | Ricochet Energy, Inc. | Lopez #1 | 12,500 | 47939847 |
| 637620 | May 21, 2007 | May 21, 2007 | Blackbrush O & G, Inc. | Petty Ranch #8012 | 5,700 | 47939846 |
| 638881 | May 19, 2007 | May 19, 2007 | Chesapeake Operating, Inc. | Bruni Miner Trust A #52 | 12,000 | 47939845 |
| 638880 | May 19, 2007 | May 19, 2007 | Chesapeake Operating, Inc. | Bruni Mineral Trust "A" #51 | 12,000 | 47939844 |
| 638836 | May 18, 2007 | May 18, 2007 | EOG Resources, Inc. | Jaral #6 | 12,600 | 47939842 |
| 638722 | May 17, 2007 | May 17, 2007 | Metano Energy, LP | Galvan "P" #1 | 6,950 | 47939841 |
| 638721 | May 17, 2007 | May 17, 2007 | Metano Energy, LP | Galvan "Q" #1 | 6,850 | 47939840 |
| 638719 | May 17, 2007 | May 17, 2007 | Metano Energy, LP | Galvan "R" #1 | 6,900 | 47939839 |
| 638515 | May 15, 2007 | May 15, 2007 | Newfield Exploration Company | Gonzalez, Ruben #3 | 14,350 | 47934518 |
| 638426 | May 14, 2007 | May 14, 2007 | Lewis Petro Properties, Inc. | Beasley Welhausen State 98 #70 | 7,200 | 47939838 |
| 638426Amendment | May 14, 2007 | May 14, 2007 | Lewis Petro Properties, Inc. | Beasley Welhausen State 98 #70 | 7,200 | 47939838 |
| 638321 | May 14, 2007 | May 14, 2007 | EOG Resources, Inc. | North Marshall St Wells Fargo GU #3HH | 13,000 | 47939837 |
| 638321Amendment | May 14, 2007 | May 14, 2007 | EOG Resources, Inc. | North Marshall St Wells Fargo GU #3HH | 13,000 | 47939837 |
| 638389 | May 12, 2007 | May 12, 2007 | Conocophillips Company | AN/CY Benavides F #105 | 10,450 | 47939836 |
| 638384 | May 12, 2007 | May 12, 2007 | Lewis Petro Properties, Inc. | Meador State #19 | 7,200 | 47939834 |
| 638383 | May 12, 2007 | May 12, 2007 | Lewis Petro Properties, Inc. | Meador State #15 | 7,200 | 47939835 |
| 638347 | May 12, 2007 | May 12, 2007 | Metano Energy, LP | Galvan "O" #1 | 6,750 | 47939833 |
| 638007 | May 8, 2007 | May 8, 2007 | Enterprise Products Operating LP | Rectifier:wlo-0.7 #0007WL | 350 | 47939832 |
| 637996 | May 8, 2007 | May 8, 2007 | Enterprise Products Operating LP | Rectifier: Wlo-3.4 #0034WL | 350 | 47939831 |
| 637996Amendment | May 8, 2007 | May 8, 2007 | Enterprise Products Operating LP | Rectifier: Wlo-3.4 #0034WL | 350 | 47939831 |
| 638028 | May 7, 2007 | May 7, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #7 | 7,800 | 47939830 |
| 638027 | May 7, 2007 | May 7, 2007 | Rosetta Resources Operating LP | El Corazon Ranch #9 | 8,600 | 47939826 |
| 638017 | May 7, 2007 | May 7, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #6 | 7,800 | 47939829 |
| 638017Amendment | May 7, 2007 | May 7, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #6 | 7,800 | 47939829 |
| 638016 | May 7, 2007 | May 7, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #5 | 7,800 | 47939828 |
| 635275 | May 7, 2007 | May 7, 2007 | Enterprise Products Operating LP | Rectifier:withers #2 #W002RS | 280 | 47939827 |
| 637929 | May 4, 2007 | May 4, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #266 | 7,900 | 47939825 |
| 637928 | May 4, 2007 | May 4, 2007 | Lewis Petro Properties, Inc. | Beasley Welhausen State 105 #69 | 7,200 | 47939824 |
| 637838 | May 3, 2007 | May 3, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #265 | 8,300 | 47939821 |
| 638156 | May 2, 2007 | May 2, 2007 | Metano Energy, LP | Galvan "N" #1 | 6,850 | 47939823 |
| 638029 | May 2, 2007 | May 2, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #8 | 7,800 | 47939822 |
| 637760 | May 2, 2007 | May 2, 2007 | EOG Resources, Inc. | Puig Aviator #2 | 11,000 | 47939820 |
| 637533 | Apr 30, 2007 | Apr 30, 2007 | Conocophillips Company | Hirsch Estate #5 | 9,280 | 47939819 |
| 637517 | Apr 30, 2007 | Apr 30, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #245 | 8,830 | 47939684 |
| 637178 | Apr 20, 2007 | Apr 20, 2007 | EOG Resources, Inc. | La Purimisa Ranch #2 | 10,500 | 47939817 |
| 637175 | Apr 20, 2007 | Apr 20, 2007 | EOG Resources, Inc. | Slator Ranch #U 5 | 12,000 | 47939818 |
| 637132 | Apr 20, 2007 | Apr 20, 2007 | Chesapeake Operating, Inc. | Bruni Mineral Trust "A" #49 | 12,000 | 47939816 |
| 637046 | Apr 17, 2007 | Apr 17, 2007 | Killam Oil Co., Ltd. | Killam Hurd McLean 122 #1 | 18,000 | 47939815 |
| 637009 | Apr 17, 2007 | Apr 17, 2007 | Blackbrush O & G, Inc. | Petty Ranch #901 | 5,700 | 47939814 |
| 636784 | Apr 16, 2007 | Apr 16, 2007 | Carburante Exploration Co, Ltd. | Los Ojuelos Mineral Trust #2 | 8,500 | 47939813 |
| 636747 | Apr 14, 2007 | Apr 14, 2007 | Blackbrush O & G, Inc. | Petty Ranch #7015 | 5,600 | 47939812 |
| 636688 | Apr 14, 2007 | Apr 14, 2007 | Chevron U. S. A. Inc. | Bruni Mineral Trust "C" #47 | 9,100 | 47939811 |
| 636688Amendment | Apr 14, 2007 | Apr 14, 2007 | Chevron U. S. A. Inc. | Bruni Mineral Trust "C" #47 | 9,100 | 47939811 |
| 636685 | Apr 14, 2007 | Apr 14, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #20 | 7,150 | 47935027 |
| 636635 | Apr 13, 2007 | Apr 13, 2007 | Lewis Petro Properties, Inc. | Saunders-State 108 #7 | 7,200 | 47939810 |
| 636570 | Apr 13, 2007 | Apr 13, 2007 | Blackbrush O & G, Inc. | Gates 05D #2015 | 10,500 | 47939809 |
| 636411 | Apr 10, 2007 | Apr 10, 2007 | Blackbrush O & G, Inc. | Gates Ranch 05S #1111 | 6,000 | 47939808 |
| 636362 | Apr 9, 2007 | Apr 9, 2007 | EOG Resources, Inc. | Slator Ranch #X 2 | 12,500 | 47939807 |
| 636359 | Apr 9, 2007 | Apr 9, 2007 | Virtex Petroleum Company, Inc. | Johns, E. S. Estate #9 | 7,800 | 47939806 |
| 636352 | Apr 9, 2007 | Apr 9, 2007 | Virtex Petroleum Company, Inc. | Johns, E. S. Estate #8 | 7,800 | 47939805 |
| 636306 | Apr 6, 2007 | Apr 6, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #263 | 9,500 | 47939804 |
| 636218 | Apr 6, 2007 | Apr 6, 2007 | Conocophillips Company | Hirsch Estate #4 | 9,480 | 47939803 |
| 636108 | Apr 3, 2007 | Apr 3, 2007 | Conocophillips Company | Vaquillas Ranch G #225 | 12,600 | 47939802 |
| 636070 | Apr 3, 2007 | Apr 3, 2007 | EOG Resources, Inc. | Staggs #9HH | 12,000 | 47939801 |
| 635936 | Apr 2, 2007 | Apr 2, 2007 | Blackbrush O & G, Inc. | Petty Ranch #9012 | 5,500 | 47939800 |
| 634325 | Mar 30, 2007 | Mar 30, 2007 | Rockford Energy Partners II, LLC | San Ambrosia "B" #6 | 4,300 | 47939798 |