| 709615Amendment | Mar 4, 2011 | Mar 4, 2011 | XTO Energy Inc. | Glasscock N Fee #13 | 8,500 | 17334013 |
| 707976 | Mar 3, 2011 | Mar 3, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #6017 | 3,200 | 17333936 |
| 707974 | Mar 3, 2011 | Mar 3, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #6016 | 3,200 | 17333935 |
| 709480 | Mar 2, 2011 | Mar 2, 2011 | Adventure Exploration Ptrs, LLC | Evans #5 | 10,500 | 17334011 |
| 709480Amendment | Mar 2, 2011 | Mar 2, 2011 | Bluestem Energy Holdings, LLC | Evans #5 | 11,500 | 17334011 |
| 708822 | Mar 2, 2011 | Mar 2, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #3015 | 3,200 | 17333995 |
| 708448 | Mar 2, 2011 | Mar 2, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #8023 | 3,200 | 17334005 |
| 708445 | Mar 2, 2011 | Mar 2, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #8031 | 3,200 | 17333994 |
| 707948 | Mar 2, 2011 | Mar 2, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #1081 | 3,200 | 17333934 |
| 707948Amendment | Mar 2, 2011 | Mar 2, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #1081 | 3,200 | 17333934 |
| 711019 | Mar 1, 2011 | Mar 1, 2011 | Laredo Petroleum, Inc. | Ratliff 17 a Unit #5HH | 9,300 | 17334051 |
| 711019Amendment | Mar 1, 2011 | Mar 1, 2011 | Laredo Petroleum, Inc. | Ratliff 17 a Unit #5HH | 9,300 | 17334051 |
| 710982 | Mar 1, 2011 | Mar 1, 2011 | Pioneer Natural Res. USA, Inc. | Cheatham '31' #3 | 10,575 | 17334050 |
| 711025 | Feb 28, 2011 | Feb 28, 2011 | COG Operating LLC | Currie #2607 | 10,500 | 17334047 |
| 711025Amendment | Feb 28, 2011 | Feb 28, 2011 | COG Operating LLC | Currie #2607 | 10,500 | 17334047 |
| 711025Amendment | Feb 28, 2011 | Feb 28, 2011 | COG Operating LLC | Currie #2607 | 10,500 | 17334047 |
| 710975 | Feb 28, 2011 | Feb 28, 2011 | Burleson Petroleum, Inc. | Cox 21 #1 | 9,800 | 17334049 |
| 710975Amendment | Feb 28, 2011 | Feb 28, 2011 | Burleson Petroleum, Inc. | Cox 21 #1 | 9,800 | 17334049 |
| 710975Amendment | Feb 28, 2011 | Feb 28, 2011 | Burleson Petroleum, Inc. | Cox 21 #1 | 9,800 | 17334049 |
| 710951 | Feb 28, 2011 | Feb 28, 2011 | Pioneer Natural Res. USA, Inc. | Hurt #4 | 10,700 | 17334048 |
| 710737 | Feb 28, 2011 | Feb 28, 2011 | Crownquest Operating, LLC | Lomax 11 #1 | 11,500 | 17334045 |
| 710707 | Feb 28, 2011 | Feb 28, 2011 | Piedra Operating, LLC | Berry #2014 | 11,500 | 17334044 |
| 710706 | Feb 28, 2011 | Feb 28, 2011 | Piedra Operating, LLC | Blalock E #1205 | 11,500 | 17334043 |
| 710706Amendment | Feb 28, 2011 | Feb 28, 2011 | Berry Oil Comp. | Blalock E #1205 | 11,500 | 17334043 |
| 710703 | Feb 28, 2011 | Feb 28, 2011 | Piedra Operating, LLC | Zant B #3703 | 11,000 | 17334042 |
| 710615 | Feb 25, 2011 | Feb 25, 2011 | Endeavor Energy Resources L.P. | Lange Farms "7" #1 | 12,000 | 17334041 |
| 710615Amendment | Feb 25, 2011 | Feb 25, 2011 | Endeavor Energy Resources L.P. | Lange Farms '7' #1 | 12,000 | 17334041 |
| 710610 | Feb 25, 2011 | Feb 25, 2011 | Endeavor Energy Resources L.P. | Daniel - Huling Unit #1 | 12,000 | 17334040 |
| 710610Amendment | Feb 25, 2011 | Feb 25, 2011 | Endeavor Energy Resources L.P. | Daniel - Huling Unit #1 | 12,000 | 17334040 |
| 710600 | Feb 25, 2011 | Feb 25, 2011 | Laredo Petroleum, Inc. | Cox 29 #4 | 11,000 | 17334037 |
| 710602 | Feb 24, 2011 | Feb 24, 2011 | Laredo Petroleum, Inc. | Guthrie Trust A #1903 | 11,000 | 17334035 |
| 710526 | Feb 24, 2011 | Feb 24, 2011 | Apache Corporation | Riley #4703 | 11,000 | 17334039 |
| 710699 | Feb 23, 2011 | Feb 23, 2011 | Piedra Operating, LLC | Blalock 33 #5 | 11,500 | 17334038 |
| 710359 | Feb 23, 2011 | Feb 23, 2011 | McClure Oil Company, Inc. | Glass '46' #7 | 5,300 | 17334036 |
| 710148 | Feb 22, 2011 | Feb 22, 2011 | Pioneer Natural Res. USA, Inc. | Stone '45' #2 | 10,600 | 17334034 |
| 710379 | Feb 18, 2011 | Feb 18, 2011 | Apache Corporation | Grouse 19 #1 | 11,000 | 17334033 |
| 710358 | Feb 18, 2011 | Feb 18, 2011 | McClure Oil Company, Inc. | Archer #9 | 5,300 | 17334032 |
| 710355 | Feb 18, 2011 | Feb 18, 2011 | McClure Oil Company, Inc. | Archer #8 | 5,300 | 17334031 |
| 710319 | Feb 17, 2011 | Feb 17, 2011 | Laredo Petroleum, Inc. | Neumann 2 #1 | 11,000 | 17334030 |
| 710315 | Feb 17, 2011 | Feb 17, 2011 | Laredo Petroleum, Inc. | Currie Trust 28 #1 | 11,000 | 17334029 |
| 710304 | Feb 17, 2011 | Feb 17, 2011 | COG Operating LLC | Currie "E" #3113 | 10,500 | 17334028 |
| 710304Amendment | Feb 17, 2011 | Feb 17, 2011 | COG Operating LLC | Currie "E" State #3113 | 10,500 | 17334028 |
| 710304Amendment | Feb 17, 2011 | Feb 17, 2011 | COG Operating LLC | Currie 'E' State #3113 | 10,500 | 17334028 |
| 710300 | Feb 17, 2011 | Feb 17, 2011 | Hannathon Petroleum, LLC | Ray 26 #2 | 10,000 | 17334027 |
| 710250 | Feb 17, 2011 | Feb 17, 2011 | Hannathon Petroleum, LLC | George Michael #1 | 3,000 | 17334025 |
| 710090 | Feb 16, 2011 | Feb 16, 2011 | Apache Corporation | Glass 3 #2 | 11,000 | 17334026 |
| 709949 | Feb 14, 2011 | Feb 14, 2011 | Laredo Petroleum, Inc. | Lazy E #1101 | 10,300 | 17334023 |
| 709949Amendment | Feb 14, 2011 | Feb 14, 2011 | Laredo Petroleum, Inc. | Lazy E #1101 | 10,300 | 17334023 |
| 709911 | Feb 11, 2011 | Feb 11, 2011 | Apache Corporation | Currie 23 #2 | 11,000 | 17334022 |
| 709621 | Feb 11, 2011 | Feb 11, 2011 | XTO Energy Inc. | Glasscock N Fee #12 | 11,300 | 17334024 |
| 709621Amendment | Feb 11, 2011 | Feb 11, 2011 | XTO Energy Inc. | Glasscock N Fee #12 | 11,300 | 17334024 |
| 709621Amendment | Feb 11, 2011 | Feb 11, 2011 | XTO Energy Inc. | Glasscock N Fee #12 | 11,300 | 17334024 |
| 709948 | Feb 10, 2011 | Feb 10, 2011 | Laredo Petroleum, Inc. | Lazy E #1001 | 10,300 | 17334021 |
| 709948Amendment | Feb 10, 2011 | Feb 10, 2011 | Laredo Petroleum, Inc. | Lazy E #1001 | 10,300 | 17334021 |
| 709869 | Feb 10, 2011 | Feb 10, 2011 | Apache Corporation | His Blessing 34 #1 | 11,000 | 17334020 |
| 708628 | Feb 10, 2011 | Feb 10, 2011 | Energen Resources Corporation | Frio #3 | 11,000 | 17334019 |
| 708628Amendment | Feb 10, 2011 | Feb 10, 2011 | Energen Resources Corporation | Frio -A- #1 | 11,000 | 17334019 |
| 709801 | Feb 9, 2011 | Feb 9, 2011 | Endeavor Energy Resources L.P. | Glass '36' #2 | 12,000 | 17334018 |
| 709726 | Feb 9, 2011 | Feb 9, 2011 | Laredo Petroleum, Inc. | Bearkat #1503 | 9,810 | 17334017 |
| 706105 | Feb 9, 2011 | Feb 9, 2011 | Energen Resources Corporation | Cole Ranch -35- #4007 | 12,000 | 17333860 |
| 706105Amendment | Feb 9, 2011 | Feb 9, 2011 | Energen Resources Corporation | Cole Ranch -35- #4007 | 12,000 | 17333860 |
| 706100 | Feb 9, 2011 | Feb 9, 2011 | Energen Resources Corporation | Cole Ranch -35- #4004 | 12,000 | 17333859 |
| 706099 | Feb 9, 2011 | Feb 9, 2011 | Energen Resources Corporation | Cole Ranch -35- #4006 | 12,000 | 17333876 |
| 706098 | Feb 9, 2011 | Feb 9, 2011 | Energen Resources Corporation | Cole Ranch -35- #4104 | 12,000 | 17333858 |
| 706098Amendment | Feb 9, 2011 | Feb 9, 2011 | Energen Resources Corporation | Cole Ranch -35- #4104 | 12,000 | 17333858 |
| 706097 | Feb 9, 2011 | Feb 9, 2011 | Energen Resources Corporation | Cole Ranch -35- #4103 | 12,000 | 17333857 |
| 709750 | Feb 8, 2011 | Feb 8, 2011 | Laredo Petroleum, Inc. | East Boxcar 48 #2 | 9,900 | 17334015 |
| 709737 | Feb 8, 2011 | Feb 8, 2011 | Laredo Petroleum, Inc. | Lazy E #1502 | 10,100 | 17334014 |
| 709737Amendment | Feb 8, 2011 | Feb 8, 2011 | Laredo Petroleum, Inc. | Lazy E #1502 | 10,100 | 17334014 |
| 709511 | Feb 8, 2011 | Feb 8, 2011 | Range Production Company | Edmondson A #3630 | 10,000 | 17334012 |
| 709346 | Feb 8, 2011 | Feb 8, 2011 | Range Production Company | Edmondson A #191HH | 9,000 | 17334010 |
| 709346Amendment | Feb 8, 2011 | Feb 8, 2011 | Range Production Company | Edmondson A #191HH | 9,010 | 17334010 |
| 709340 | Feb 8, 2011 | Feb 8, 2011 | Pioneer Natural Res. USA, Inc. | Kaylina '18' #2 | 10,600 | 17334016 |
| 709258 | Feb 3, 2011 | Feb 3, 2011 | Adventure Exploration Ptrs, LLC | Weaver #2 | 10,500 | 17334008 |
| 709258Amendment | Feb 3, 2011 | Feb 3, 2011 | Adventure Exploration Ptrs, LLC | Weaver #2 | 10,900 | 17334008 |
| 709256 | Feb 3, 2011 | Feb 3, 2011 | Adventure Exploration Ptrs, LLC | Weaver #1 | 10,500 | 17334007 |
| 709256Amendment | Feb 3, 2011 | Feb 3, 2011 | Adventure Exploration Ptrs, LLC | Weaver #1 | 10,900 | 17334007 |
| 709134 | Jan 31, 2011 | Jan 31, 2011 | Broad Oak Energy, Inc. | Lane Trust -a- Oil Unit #42J | 10,500 | 17334009 |
| 709134Amendment | Jan 31, 2011 | Jan 31, 2011 | Laredo Petroleum, Inc. | Lane Trust -a- Oil Unit #42J | 10,500 | 17334009 |
| 709272 | Jan 28, 2011 | Jan 28, 2011 | Pioneer Natural Res. USA, Inc. | Lloyd #6 | 10,800 | 17334006 |
| 709272Amendment | Jan 28, 2011 | Jan 28, 2011 | Pioneer Natural Res. USA, Inc. | Lloyd #6 | 11,200 | 17334006 |
| 709272Amendment | Jan 28, 2011 | Jan 28, 2011 | Pioneer Natural Res. USA, Inc. | Lloyd #6 | 11,200 | 17334006 |
| 709208 | Jan 28, 2011 | Jan 28, 2011 | Endeavor Energy Resources L.P. | Glass '25A' #2 | 12,000 | 17334004 |
| 708989 | Jan 28, 2011 | Jan 28, 2011 | Royalty Land & Dev. Co., Inc. | Lois Blalock "C" #710 | 10,350 | 17334000 |
| 708989Amendment | Jan 28, 2011 | Jan 28, 2011 | Royalty Land & Dev. Co., Inc. | Lois Blalock #C710 | 10,350 | 17334000 |
| 709101 | Jan 27, 2011 | Jan 27, 2011 | Apache Corporation | Gibson 7 #2 | 10,600 | 17334003 |
| 709071 | Jan 27, 2011 | Jan 27, 2011 | Apache Corporation | Speckled Trout 35 #2 | 9,900 | 17334002 |
| 709071Amendment | Jan 27, 2011 | Jan 27, 2011 | Apache Corporation | Speckled Trout 35 #2 | 9,900 | 17334002 |
| 709071Amendment | Jan 27, 2011 | Jan 27, 2011 | Apache Corporation | Speckled Trout 35 #2 | 11,000 | 17334002 |
| 709021 | Jan 27, 2011 | Jan 27, 2011 | Laredo Petroleum, Inc. | Lazy E #1201 | 9,800 | 17334001 |
| 709021Amendment | Jan 27, 2011 | Jan 27, 2011 | Laredo Petroleum, Inc. | Lazy E #1201 | 9,800 | 17334001 |
| 708982 | Jan 27, 2011 | Jan 27, 2011 | Laredo Petroleum, Inc. | Moore 25 #5HH | 9,300 | 17333999 |
| 708933 | Jan 27, 2011 | Jan 27, 2011 | Laredo Petroleum, Inc. | Currie Trust 6 #2 | 9,900 | 17333998 |
| 708518Amendment | Jan 27, 2011 | Jan 27, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #8027W | 3,200 | 17334081 |
| 708517 | Jan 27, 2011 | Jan 27, 2011 | Sheridan Production Company, LLC | Glasscock, Howard W. (G-S) Unit #8024W | 3,200 | 17333970 |
| 708931 | Jan 26, 2011 | Jan 26, 2011 | Apache Corporation | Swordfish 37 #1 | 9,850 | 17333997 |
| 708931Amendment | Jan 26, 2011 | Jan 26, 2011 | Apache Corporation | Swordfish 37 #1 | 10,500 | 17333997 |
| 708837 | Jan 25, 2011 | Jan 25, 2011 | Pioneer Natural Res. USA, Inc. | Wood Family '28' #1 | 10,575 | 17333996 |
| 708755 | Jan 24, 2011 | Jan 24, 2011 | Apache Corporation | Mackerel 24A #1 | 10,300 | 17333992 |
| 708272 | Jan 24, 2011 | Jan 24, 2011 | Crownquest Operating, LLC | Perry Brooks 2 #2 | 11,000 | 17333993 |