| 718415 | Jun 17, 2011 | Jun 17, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #21HH | 8,600 | 12734156 |
| 718415Amendment | Jun 17, 2011 | Jun 17, 2011 | Anadarko E&P Onshore LLC | Briscoe Catarina North #21HH | 7,656 | 12734156 |
| 718413 | Jun 17, 2011 | Jun 17, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #20HH | 8,600 | 12734155 |
| 718413Amendment | Jun 17, 2011 | Jun 17, 2011 | Anadarko E&P Onshore LLC | Briscoe Catarina North #20HH | 7,649 | 12734155 |
| 717841 | Jun 15, 2011 | Jun 15, 2011 | Newfield Exploration Company | Cmww A #4403HH | 7,800 | 12734142 |
| 718175 | Jun 14, 2011 | Jun 14, 2011 | Anadarko E&P Company LP | Briscoe Catarina Ranch #30HH | 12,850 | 12734154 |
| 718169 | Jun 14, 2011 | Jun 14, 2011 | Anadarko E&P Company LP | Briscoe Chip East Ranch #14HH | 9,100 | 12734153 |
| 718161 | Jun 14, 2011 | Jun 14, 2011 | Anadarko E&P Company LP | Briscoe Chip East Ranch #10HH | 9,100 | 12734152 |
| 718157 | Jun 14, 2011 | Jun 14, 2011 | Anadarko E&P Company LP | Briscoe Chip East Ranch #9HH | 9,100 | 12734151 |
| 718107 | Jun 14, 2011 | Jun 14, 2011 | Anadarko E&P Company LP | Diamond H Ranch #6HH | 8,700 | 12734150 |
| 718102 | Jun 14, 2011 | Jun 14, 2011 | Chesapeake Operating, Inc. | Von Rosenberg Unit a Dim #1HH | 9,000 | 12734149 |
| 718036 | Jun 13, 2011 | Jun 13, 2011 | Chesapeake Operating, Inc. | Light #D 4HH | 9,000 | 12734148 |
| 718029 | Jun 13, 2011 | Jun 13, 2011 | Chesapeake Operating, Inc. | Light #D 2HH | 9,000 | 12734147 |
| 717969 | Jun 10, 2011 | Jun 10, 2011 | Chesapeake Operating, Inc. | Big Wells South Dim #Q 1HH | 9,000 | 12734146 |
| 717928 | Jun 10, 2011 | Jun 10, 2011 | Murphy Expl. & Prod. Co. - USA | Briggs #7HH | 7,750 | 12734145 |
| 717893 | Jun 10, 2011 | Jun 10, 2011 | Anadarko E&P Company LP | Diamond H State #6HH | 8,700 | 12734144 |
| 717872 | Jun 10, 2011 | Jun 10, 2011 | Chesapeake Operating, Inc. | Blakeway Unit B Dim #1HH | 9,000 | 12734143 |
| 717582 | Jun 3, 2011 | Jun 3, 2011 | Chesapeake Operating, Inc. | Pena Creek III Unit Dim D #3HH | 9,000 | 12734141 |
| 717574 | Jun 3, 2011 | Jun 3, 2011 | Newfield Exploration Company | Ferguson McKnight #5922HH | 6,500 | 12734140 |
| 717538 | Jun 3, 2011 | Jun 3, 2011 | Killam Oil Co., Ltd. | Big Wells Unit #1H | 7,000 | 12734139 |
| 717532 | Jun 3, 2011 | Jun 3, 2011 | Chesapeake Operating, Inc. | Pena Creek I Unit B Dim #1HH | 15,000 | 12734138 |
| 717194 | Jun 3, 2011 | Jun 3, 2011 | Ces SWD Texas, Inc. | Ces Carrizo Yard #2 | 4,000 | 12734132 |
| 717474 | Jun 2, 2011 | Jun 2, 2011 | Anadarko E&P Company LP | Rogers Dentonio Ranch #15HH | 7,350 | 12734137 |
| 717474Amendment | Jun 2, 2011 | Jun 2, 2011 | Anadarko E&P Onshore LLC | Rogers Dentonio Ranch #15HH | 7,193 | 12734137 |
| 717466 | Jun 2, 2011 | Jun 2, 2011 | Anadarko E&P Company LP | Rogers Dentonio Ranch #14HH | 7,350 | 12734136 |
| 717461 | Jun 2, 2011 | Jun 2, 2011 | Anadarko E&P Company LP | Briscoe Carla Ranch #18HH | 8,200 | 12734135 |
| 717461Amendment | Jun 2, 2011 | Jun 2, 2011 | Anadarko E&P Onshore LLC | Briscoe Carla Ranch #18HH | 7,231 | 12734135 |
| 717460 | Jun 2, 2011 | Jun 2, 2011 | Anadarko E&P Company LP | Briscoe Carla Ranch #17HH | 8,200 | 12734134 |
| 717460Amendment | Jun 2, 2011 | Jun 2, 2011 | Anadarko E&P Onshore LLC | Briscoe Carla Ranch #17HH | 7,221 | 12734134 |
| 717454 | Jun 2, 2011 | Jun 2, 2011 | Anadarko E&P Company LP | Briscoe Carla Ranch #16HH | 8,200 | 12734133 |
| 717454Amendment | Jun 2, 2011 | Jun 2, 2011 | Anadarko E&P Onshore LLC | Briscoe Carla Ranch #16HH | 7,203 | 12734133 |
| 717252 | Jun 1, 2011 | Jun 1, 2011 | Newfield Exploration Company | Ferguson McKnight #5921HH | 6,500 | 12734131 |
| 717190 | May 31, 2011 | May 31, 2011 | Ces SWD Texas, Inc. | Ces Carrizo Yard #1 | 4,000 | 12734127 |
| 717336 | May 30, 2011 | May 30, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #25HH | 8,600 | 12734130 |
| 717336Amendment | May 30, 2011 | May 30, 2011 | Anadarko E&P Onshore LLC | Briscoe Catarina North #25HH | 7,658 | 12734130 |
| 717333 | May 30, 2011 | May 30, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #24HH | 8,600 | 12734129 |
| 717333Amendment | May 30, 2011 | May 30, 2011 | Anadarko E&P Onshore LLC | Briscoe Catarina North #24HH | 7,682 | 12734129 |
| 717331 | May 30, 2011 | May 30, 2011 | Anadarko E&P Company LP | Briscoe Catarina North #23HH | 8,600 | 12734128 |
| 717331Amendment | May 30, 2011 | May 30, 2011 | Anadarko E&P Onshore LLC | Briscoe Catarina North #23HH | 7,669 | 12734128 |
| 717207 | May 26, 2011 | May 26, 2011 | Newfield Exploration Company | Moro Creek #178 | 300 | 12734126 |
| 717206 | May 26, 2011 | May 26, 2011 | Newfield Exploration Company | Moro Creek #170 | 300 | 12734125 |
| 717198 | May 26, 2011 | May 26, 2011 | Newfield Exploration Company | Moro Creek #162 | 300 | 12734124 |
| 717193 | May 26, 2011 | May 26, 2011 | Newfield Exploration Company | Moro Creek #154 | 300 | 12734123 |
| 717191 | May 26, 2011 | May 26, 2011 | Newfield Exploration Company | Moro Creek #153 | 300 | 12734122 |
| 717188 | May 26, 2011 | May 26, 2011 | Newfield Exploration Company | Moro Creek #144 | 300 | 12734121 |
| 717181 | May 26, 2011 | May 26, 2011 | Newfield Exploration Company | Moro Creek #143 | 300 | 12734120 |
| 717174 | May 26, 2011 | May 26, 2011 | Newfield Exploration Company | Moro Creek #132 | 300 | 12734119 |
| 717120 | May 26, 2011 | May 26, 2011 | Anadarko E&P Company LP | Briscoe Cochina West Ranch #17HH | 9,200 | 12734118 |
| 717110 | May 26, 2011 | May 26, 2011 | Anadarko E&P Company LP | Briscoe Cochina West Ranch #16HH | 9,200 | 12734116 |
| 717129 | May 25, 2011 | May 25, 2011 | Anadarko E&P Company LP | Briscoe Cochina West Ranch #18HH | 9,200 | 12734117 |
| 716833 | May 23, 2011 | May 23, 2011 | Anadarko E&P Company LP | Beinhorn Ranch #21HH | 9,200 | 12734115 |
| 716831 | May 23, 2011 | May 23, 2011 | Anadarko E&P Company LP | Beinhorn Ranch #12HH | 9,200 | 12734114 |
| 716827 | May 23, 2011 | May 23, 2011 | Anadarko E&P Company LP | Beinhorn Ranch #11HH | 9,200 | 12734113 |
| 716761 | May 23, 2011 | May 23, 2011 | Shell Western E&P | Piloncillo #A 6HAH | 10,500 | 12734109 |
| 716761Amendment | May 23, 2011 | May 23, 2011 | Shell Western E&P | Piloncillo #A 6HAH | 18,000 | 12734109 |
| 716558 | May 23, 2011 | May 23, 2011 | Bellows Operating Co., L. C. | Owen #1 | 7,165 | 12731602 |
| 716228 | May 23, 2011 | May 23, 2011 | Lewis Petro Properties, Inc. | Cotulla #11HH | 17,000 | 12734101 |
| 716228Amendment | May 23, 2011 | May 23, 2011 | Lewis Petro Properties, Inc. | Cotulla #11HH | 17,000 | 12734101 |
| 716799 | May 20, 2011 | May 20, 2011 | Newfield Exploration Company | Pritchett #2801HH | 6,100 | 12734112 |
| 716764 | May 20, 2011 | May 20, 2011 | Shell Western E&P | Piloncillo #A 6HDH | 10,500 | 12734111 |
| 716764Amendment | May 20, 2011 | May 20, 2011 | Shell Western E&P | Piloncillo #A 6HDH | 18,000 | 12734111 |
| 716763 | May 20, 2011 | May 20, 2011 | Shell Western E&P | Piloncillo #A 6HCH | 10,500 | 12734110 |
| 716763Amendment | May 20, 2011 | May 20, 2011 | Shell Western E&P | Piloncillo #A 6HCH | 18,000 | 12734110 |
| 716762 | May 20, 2011 | May 20, 2011 | Shell Western E&P | Piloncillo #A 6HBH | 8,400 | 12734108 |
| 716762Amendment | May 20, 2011 | May 20, 2011 | Shell Western E&P | Piloncillo #A 6HBH | 18,000 | 12734108 |
| 716701 | May 20, 2011 | May 20, 2011 | Anadarko E&P Company LP | Briscoe Cochina East Ranch #32HH | 9,200 | 12734107 |
| 716701Amendment | May 20, 2011 | May 20, 2011 | Anadarko E&P Company LP | Briscoe Cochina East Ranch #32HH | 9,200 | 12734107 |
| 716599 | May 19, 2011 | May 19, 2011 | Blackbrush O & G, Inc. | San Pedro Ranch #2526HH | 4,500 | 12734106 |
| 716568 | May 19, 2011 | May 19, 2011 | Chesapeake Operating, Inc. | Allee Dim C #1HH | 12,000 | 12734105 |
| 716568Amendment | May 19, 2011 | May 19, 2011 | Chesapeake Operating, Inc. | Allee Dim C #1HH | 9,000 | 12734105 |
| 716529 | May 18, 2011 | May 18, 2011 | Anadarko E&P Company LP | South Spur Ranch #6HH | 6,900 | 12734104 |
| 716529Amendment | May 18, 2011 | May 18, 2011 | Anadarko E&P Onshore LLC | South Spur Unit A #1HH | 6,751 | 12734104 |
| 716327 | May 17, 2011 | May 17, 2011 | Carrizo Oil & Gas, Inc. | Ivey Ranch #12HH | 11,000 | 12734103 |
| 716324 | May 17, 2011 | May 17, 2011 | Carrizo Oil & Gas, Inc. | Ivey Ranch #11HH | 11,000 | 12734102 |
| 716227 | May 16, 2011 | May 16, 2011 | Shell Western E&P | Piloncillo #A 6V | 9,500 | 12734100 |
| 716211 | May 16, 2011 | May 16, 2011 | Chesapeake Operating, Inc. | Whitecotton Unit C Dim #1HH | 16,500 | 12734099 |
| 715786 | May 16, 2011 | May 16, 2011 | Redemption Oil & Gas, LLC | Tocquigny #101HH | 6,400 | 12734075 |
| 716178 | May 13, 2011 | May 13, 2011 | Anadarko E&P Company LP | Briscoe Cochina East Ranch #31HH | 9,200 | 12734098 |
| 716130 | May 13, 2011 | May 13, 2011 | Anadarko E&P Company LP | Briscoe Chip East Ranch #8HH | 9,100 | 12734096 |
| 716122 | May 13, 2011 | May 13, 2011 | Anadarko E&P Company LP | Briscoe Chip East Ranch #7HH | 9,100 | 12734095 |
| 716102 | May 13, 2011 | May 13, 2011 | Newfield Exploration Company | Moro Creek #149 | 300 | 12734097 |
| 716036 | May 12, 2011 | May 12, 2011 | Chesapeake Operating, Inc. | Sanford Unit Dim #1HH | 9,000 | 12734094 |
| 715911 | May 11, 2011 | May 11, 2011 | Carrizo Oil & Gas, Inc. | Ivey Ranch #10HH | 9,000 | 12734093 |
| 715911Amendment | May 11, 2011 | May 11, 2011 | Carrizo Oil & Gas, Inc. | Ivey Ranch #10HH | 11,000 | 12734093 |
| 715911Amendment | May 11, 2011 | May 11, 2011 | Carrizo Oil & Gas, Inc. | Ivey Ranch #10HH | 11,000 | 12734093 |
| 715804 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #196 | 300 | 12734092 |
| 715803 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #183 | 300 | 12734091 |
| 715802 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #165 | 300 | 12734090 |
| 715801 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #195 | 300 | 12734089 |
| 715800 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #188 | 300 | 12734088 |
| 715796 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #179 | 300 | 12734087 |
| 715795 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #164 | 300 | 12734086 |
| 715794 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #181 | 300 | 12734085 |
| 715793 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #180 | 300 | 12734084 |
| 715791 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #189 | 300 | 12734083 |
| 715789 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #182 | 300 | 12734082 |
| 715785 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #190 | 300 | 12734081 |
| 715781 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #194 | 300 | 12734080 |
| 715778 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #193 | 300 | 12734079 |
| 715774 | May 10, 2011 | May 10, 2011 | Newfield Exploration Company | Moro Creek #187 | 300 | 12734078 |