| 707330Amendment | Dec 22, 2010 | Dec 22, 2010 | Vantage Fort Worth Energy LLC | Mitchell-Baldinger (SA) #3HH12134107 | 8,900 |
| 707107 | Dec 22, 2010 | Dec 22, 2010 | Burlington Resources O & G Co LP | Buckley a Unit #4HH12134110 | 9,000 |
| 707331 | Dec 21, 2010 | Dec 21, 2010 | Vantage Fort Worth Energy LLC | Mitchell-Baldinger #4HH12134108 | 8,500 |
| 707331Amendment | Dec 21, 2010 | Dec 21, 2010 | Vantage Fort Worth Energy LLC | Mitchell-Baldinger #4HH12134108 | 8,500 |
| 707331Amendment | Dec 21, 2010 | Dec 21, 2010 | Vantage Fort Worth Energy LLC | Mitchell-Baldinger (SA) #4HH12134108 | 8,900 |
| 707329 | Dec 21, 2010 | Dec 21, 2010 | Vantage Fort Worth Energy LLC | Mitchell-Baldinger #2HH12134106 | 8,500 |
| 707329Amendment | Dec 21, 2010 | Dec 21, 2010 | Vantage Fort Worth Energy LLC | Mitchell-Baldinger #2HH12134106 | 8,500 |
| 707329Amendment | Dec 21, 2010 | Dec 21, 2010 | Vantage Fort Worth Energy LLC | Mitchell-Baldinger #2HH12134106 | 8,500 |
| 707329Amendment | Dec 21, 2010 | Dec 21, 2010 | Vantage Fort Worth Energy LLC | Mitchell-Baldinger (SA) #2HH12134106 | 8,900 |
| 707050 | Dec 21, 2010 | Dec 21, 2010 | Devon Energy Production Co, L.P. | D2-D1-D2-D1 (SA) #1HH12134104 | 9,000 |
| 706788 | Dec 20, 2010 | Dec 20, 2010 | Titan Operating, LLC | Prologis SE Unit #1HH12134103 | 8,500 |
| 706788Amendment | Dec 20, 2010 | Dec 20, 2010 | Titan Operating, LLC | Prologis SE Unit #1HH12134103 | 8,500 |
| 706788Amendment | Dec 20, 2010 | Dec 20, 2010 | Titan Operating, LLC | Prologis SE Unit #1HH12134103 | 8,500 |
| 707116 | Dec 17, 2010 | Dec 17, 2010 | Devon Energy Production Co, L.P. | Dcco 2-Dcco 1 (SA) 'A' #1HH12134105 | 9,000 |
| 706058 | Dec 1, 2010 | Dec 1, 2010 | Titan Operating, LLC | B & H NE Unit #1HH12134102 | 8,500 |
| 706058Amendment | Dec 1, 2010 | Dec 1, 2010 | Titan Operating, LLC | B & H NE Unit #1HH12134102 | 8,500 |
| 705895 | Nov 24, 2010 | Nov 24, 2010 | Titan Operating, LLC | B & H SE Unit #1HH12134101 | 8,500 |
| 705779 | Nov 24, 2010 | Nov 24, 2010 | Titan Operating, LLC | Ingram SW Unit #1HH12134100 | 8,500 |
| 705779Amendment | Nov 24, 2010 | Nov 24, 2010 | Titan Operating, LLC | Ingram SW Unit #1HH12134100 | 8,500 |
| 705558 | Nov 24, 2010 | Nov 24, 2010 | Devon Energy Production Co, L.P. | Taylor, Dan #6HH12134099 | 9,000 |
| 704987 | Nov 12, 2010 | Nov 12, 2010 | Burlington Resources O & G Co LP | Krum Joint Venture #12HH12134098 | 9,000 |
| 704983 | Nov 12, 2010 | Nov 12, 2010 | Burlington Resources O & G Co LP | Krum Joint Venture #11HH12134097 | 9,000 |
| 704976 | Nov 12, 2010 | Nov 12, 2010 | Burlington Resources O & G Co LP | Young, Jean #17HH12134096 | 9,000 |
| 704975 | Nov 12, 2010 | Nov 12, 2010 | Burlington Resources O & G Co LP | Young, Jean #16HH12134095 | 9,000 |
| 703873 | Oct 20, 2010 | Oct 20, 2010 | Eagleridge Operating, LLC | Vaughn #1HH12132624 | 9,200 |
| 703795 | Oct 18, 2010 | Oct 18, 2010 | Hillwood O & G Operating Co LP | Whitehead East Unit #5HH12134094 | 12,000 |
| 702335 | Oct 15, 2010 | Oct 15, 2010 | Williams Prod. Gulf Coast, L.P. | Dr. Bob Smith B East #8HH12134088 | 8,500 |
| 702303 | Oct 13, 2010 | Oct 13, 2010 | Williams Prod. Gulf Coast, L.P. | Dr. Bob Smith B East #7HH12134087 | 8,500 |
| 701093 | Oct 12, 2010 | Oct 12, 2010 | Hillwood O & G Operating Co LP | W/J Lakes North Unit #L 3HH12134068 | 12,000 |
| 702770 | Sep 28, 2010 | Sep 28, 2010 | Quicksilver Resources Inc. | Alliance Gateway Cartwright Unit #4HH12134090 | 9,000 |
| 701096 | Sep 21, 2010 | Sep 21, 2010 | Hillwood O & G Operating Co LP | W/J Lakes North Unit #L 4HH12134069 | 12,000 |
| 702035 | Sep 13, 2010 | Sep 13, 2010 | Hillwood O & G Operating Co LP | Jenkins Unit #1HH12134085 | 12,000 |
| 701989 | Sep 10, 2010 | Sep 10, 2010 | Red Oak Gas Operating Company LP | Crow-Wright Unit #20HH12134084 | 13,000 |
| 701986 | Sep 10, 2010 | Sep 10, 2010 | Red Oak Gas Operating Company LP | Crow-Wright Unit #19HH12134083 | 13,000 |
| 701984 | Sep 10, 2010 | Sep 10, 2010 | Red Oak Gas Operating Company LP | Crow-Wright Unit #18HH12134082 | 13,000 |
| 701983 | Sep 10, 2010 | Sep 10, 2010 | Red Oak Gas Operating Company LP | Crow-Wright Unit #17HH12134081 | 13,000 |
| 701978 | Sep 10, 2010 | Sep 10, 2010 | Red Oak Gas Operating Company LP | Crow-Wright Unit #16HH12134080 | 13,000 |
| 701937 | Sep 10, 2010 | Sep 10, 2010 | Red Oak Gas Operating Company LP | Crow-Wright Unit #15HH12134079 | 13,000 |
| 701934 | Sep 10, 2010 | Sep 10, 2010 | Red Oak Gas Operating Company LP | Crow-Wright Unit #14HH12134078 | 13,000 |
| 701929 | Sep 10, 2010 | Sep 10, 2010 | Red Oak Gas Operating Company LP | Crow-Wright Unit #13HH12134076 | 13,000 |
| 701926 | Sep 10, 2010 | Sep 10, 2010 | Red Oak Gas Operating Company LP | Crow-Wright Unit #12HH12134077 | 13,000 |
| 699645 | Aug 31, 2010 | Aug 31, 2010 | Devon Energy Production Co, L.P. | Dcco 2 - Dcco 2 (SA) "A" #1HH12134060 | 9,000 |
| 701241 | Aug 30, 2010 | Aug 30, 2010 | Hillwood O & G Operating Co LP | Hunter Ranch #L 4HH12134073 | 12,000 |
| 701238 | Aug 30, 2010 | Aug 30, 2010 | Hillwood O & G Operating Co LP | Hunter Ranch #L 3HH12134072 | 12,000 |
| 701236 | Aug 30, 2010 | Aug 30, 2010 | Hillwood O & G Operating Co LP | Hunter Ranch #L 1HH12134070 | 12,000 |
| 701237 | Aug 27, 2010 | Aug 27, 2010 | Hillwood O & G Operating Co LP | Hunter Ranch #L 2HH12134071 | 12,000 |
| 700357 | Aug 18, 2010 | Aug 18, 2010 | Devon Energy Production Co, L.P. | Dcco 4- Wcco 1 - Dcco 4 (SA) #1HH12134064 | 9,000 |
| 700314 | Aug 17, 2010 | Aug 17, 2010 | Devon Energy Production Co, L.P. | Dcco 2 - P.G. Sullivan #26HH12134063 | 9,000 |
| 700310 | Aug 17, 2010 | Aug 17, 2010 | Devon Energy Production Co, L.P. | Dcco 2 - Ray Williams #24HH12134062 | 9,000 |
| 699856 | Aug 17, 2010 | Aug 17, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit C #12HH12134065 | 8,500 |
| 699856Amendment | Aug 17, 2010 | Aug 17, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit C #12HH12134065 | 8,500 |
| 699856Amendment | Aug 17, 2010 | Aug 17, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit C #12HH12134065 | 8,500 |
| 699856Amendment | Aug 17, 2010 | Aug 17, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit C #12HH12134065 | 8,500 |
| 699849 | Aug 17, 2010 | Aug 17, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit C #11HH12134051 | 8,500 |
| 699849Amendment | Aug 17, 2010 | Aug 17, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit C #11HH12134051 | 8,500 |
| 700367 | Aug 9, 2010 | Aug 9, 2010 | Titan Operating, LLC | Hilliard Unit #2HH12134061 | 9,000 |
| 700367Amendment | Aug 9, 2010 | Aug 9, 2010 | Titan Operating, LLC | Hilliard North Unit #1HH12134061 | 9,000 |
| 700367Amendment | Aug 9, 2010 | Aug 9, 2010 | Titan Operating, LLC | Hilliard North Unit #1HH12134061 | 9,000 |
| 699930 | Aug 2, 2010 | Aug 2, 2010 | Williams Prod. Gulf Coast, L.P. | Cobb Unit #4HH12134059 | 8,500 |
| 699925 | Aug 2, 2010 | Aug 2, 2010 | Williams Prod. Gulf Coast, L.P. | Cobb Unit #3H12134058 | 8,500 |
| 699903 | Aug 2, 2010 | Aug 2, 2010 | Williams Prod. Gulf Coast, L.P. | Cobb Unit #1HH12134052 | 8,500 |
| 699903Amendment | Aug 2, 2010 | Aug 2, 2010 | Williams Prod. Gulf Coast, L.P. | Cobb Unit #1HH12134052 | 8,500 |
| 699858 | Aug 2, 2010 | Aug 2, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit D #14HH12134054 | 8,500 |
| 699858Amendment | Aug 2, 2010 | Aug 2, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit D #14HH12134054 | 8,500 |
| 699858Amendment | Aug 2, 2010 | Aug 2, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit D #14HH12134054 | 8,500 |
| 699853 | Aug 2, 2010 | Aug 2, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit D #13HH12134053 | 8,500 |
| 699853Amendment | Aug 2, 2010 | Aug 2, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit D #13HH12134053 | 8,800 |
| 699853Amendment | Aug 2, 2010 | Aug 2, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit D #13HH12134053 | 8,800 |
| 699844 | Aug 2, 2010 | Aug 2, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit C #9HH12134049 | 8,500 |
| 699918 | Jul 30, 2010 | Jul 30, 2010 | Williams Prod. Gulf Coast, L.P. | Cobb Unit #2HH12134057 | 8,500 |
| 699918Amendment | Jul 30, 2010 | Jul 30, 2010 | Williams Prod. Gulf Coast, L.P. | Cobb Unit #2HH12134057 | 8,500 |
| 699918Amendment | Jul 30, 2010 | Jul 30, 2010 | Williams Prod. Gulf Coast, L.P. | Cobb Unit #2HH12134057 | 8,500 |
| 699845 | Jul 30, 2010 | Jul 30, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit C #10HH12134050 | 8,500 |
| 699845Amendment | Jul 30, 2010 | Jul 30, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit C #10HH12134050 | 8,500 |
| 699841 | Jul 30, 2010 | Jul 30, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit C #8HH12134048 | 8,500 |
| 699712 | Jul 29, 2010 | Jul 29, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit B #7HH12134046 | 8,500 |
| 699709 | Jul 29, 2010 | Jul 29, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit B #6HH12134047 | 8,500 |
| 699709Amendment | Jul 29, 2010 | Jul 29, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit B #6HH12134047 | 8,500 |
| 699705 | Jul 29, 2010 | Jul 29, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit B #5HH12134045 | 8,500 |
| 699705Amendment | Jul 29, 2010 | Jul 29, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit B #5HH12134045 | 8,500 |
| 699393 | Jul 23, 2010 | Jul 23, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit A #4HH12134044 | 8,500 |
| 699390 | Jul 23, 2010 | Jul 23, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit A #3HH12134043 | 8,500 |
| 699388 | Jul 23, 2010 | Jul 23, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit A #2HH12134042 | 8,500 |
| 699388Amendment | Jul 23, 2010 | Jul 23, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit A #2HH12134042 | 8,500 |
| 699380 | Jul 23, 2010 | Jul 23, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit A #1HH12134041 | 8,500 |
| 699380Amendment | Jul 23, 2010 | Jul 23, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit A #1HH12134041 | 8,500 |
| 699380Amendment | Jul 23, 2010 | Jul 23, 2010 | Williams Prod. Gulf Coast, L.P. | Ace Unit A #1HH12134041 | 8,500 |
| 699111 | Jul 19, 2010 | Jul 19, 2010 | Encana Oil & Gas(usa) Inc. | Tullio #7HH12134040 | 9,000 |
| 699109 | Jul 19, 2010 | Jul 19, 2010 | Encana Oil & Gas(usa) Inc. | Tullio #6HH12134039 | 9,000 |
| 699103 | Jul 19, 2010 | Jul 19, 2010 | Encana Oil & Gas(usa) Inc. | Tullio #5HH12134038 | 9,000 |
| 698854 | Jul 15, 2010 | Jul 15, 2010 | Devon Energy Production Co, L.P. | Dcco 2- Smith 'B' (SA) #2HH12134037 | 9,000 |
| 698853 | Jul 15, 2010 | Jul 15, 2010 | Devon Energy Production Co, L.P. | Dcco 2- Smith 'B' (SA) #1HH12134036 | 9,000 |
| 698828 | Jul 15, 2010 | Jul 15, 2010 | Devon Energy Production Co, L.P. | Dcco 2-Shoop "E"-Shoop "G" (SA) #2HH12134035 | 9,000 |
| 697245 | Jul 12, 2010 | Jul 12, 2010 | Quicksilver Resources Inc. | Alliance-Lau (SA) #D 13HH12134017 | 9,000 |
| 697245Amendment | Jul 12, 2010 | Jul 12, 2010 | Quicksilver Resources Inc. | Alliance-Lau (SA) #D 13HH12134017 | 9,000 |
| 698513 | Jul 8, 2010 | Jul 8, 2010 | Burlington Resources O & G Co LP | McMurrey Ranch Unit A #9HH12134026 | 9,000 |
| 698512 | Jul 8, 2010 | Jul 8, 2010 | Burlington Resources O & G Co LP | McMurrey Ranch Unit B #23HH12134027 | 9,000 |
| 698512Amendment | Jul 8, 2010 | Jul 8, 2010 | Burlington Resources O & G Co LP | McMurrey Ranch Unit B #23HH12134027 | 9,000 |
| 698510 | Jul 8, 2010 | Jul 8, 2010 | Burlington Resources O & G Co LP | McMurrey Ranch Unit B #34HH12134034 | 9,000 |
| 698510Amendment | Jul 8, 2010 | Jul 8, 2010 | Burlington Resources O & G Co LP | McMurrey Ranch Unit B #34HH12134034 | 9,000 |