| 720190 | Jul 20, 2011 | Jul 20, 2011 | Denali Oil & Gas Management, LLC | Tilicek Unit #1HH | 10,000 | 14933233 |
| 720316 | Jul 19, 2011 | Jul 19, 2011 | Rockefeller Hughes (USA) LLC | Van Wart #2HH | 8,500 | 14933232 |
| 717739 | Jul 18, 2011 | Jul 18, 2011 | Telico Minerals, L.L.C. | Zapalac #1 | 10,000 | 14933231 |
| 718997 | Jun 24, 2011 | Jun 24, 2011 | Omimex Petroleum, Inc. | Prost Unit #A 1HH | 17,500 | 14933230 |
| 718997Amendment | Jun 24, 2011 | Jun 24, 2011 | Sanchez Oil & Gas Corporation | Prost Unit #1HH | 17,500 | 14933230 |
| 718997Amendment | Jun 24, 2011 | Jun 24, 2011 | Sanchez Oil & Gas Corporation | Prost Unit A #1HH | 17,500 | 14933230 |
| 718350 | Jun 16, 2011 | Jun 16, 2011 | Weber Energy Corporation | Cherry #1HH | 9,000 | 14933229 |
| 715455 | Jun 16, 2011 | Jun 16, 2011 | American Disposal Services,ltd | Lear #1 | 8,275 | 14931396 |
| 718162 | Jun 14, 2011 | Jun 14, 2011 | Southern Bay Operating, L.L.C. | Peebles Unit #1HH | 17,000 | 14933228 |
| 717766 | Jun 8, 2011 | Jun 8, 2011 | Enervest Operating, L.L.C. | Schley #1H | 14,000 | 14933227 |
| 717766Amendment | Jun 8, 2011 | Jun 8, 2011 | Enervest Operating, L.L.C. | Schley #1H | 14,000 | 14933227 |
| 716835 | May 24, 2011 | May 24, 2011 | Enervest Operating, L.L.C. | T-Rex #1H | 13,000 | 14933226 |
| 715440 | May 5, 2011 | May 5, 2011 | Leexus Oil LLC | Mach #1HH | 12,500 | 14932616 |
| 715373 | May 4, 2011 | May 4, 2011 | American Disposal Services,ltd | Lear #3 | 8,311 | 14931704 |
| 714299 | Apr 19, 2011 | Apr 19, 2011 | Enervest Operating, L.L.C. | Van Rider #1H | 12,500 | 14933225 |
| 713684 | Apr 18, 2011 | Apr 18, 2011 | Beta Oil Corporation | Calvin H. Harris #1 | 8,690 | 14930345 |
| 713685 | Apr 11, 2011 | Apr 11, 2011 | Magnum Producing, LP | Lehmann et Al #1 | 6,000 | 14933210 |
| 712210 | Mar 21, 2011 | Mar 21, 2011 | Southern Bay Operating, L.L.C. | Black Jack Springs Unit #1HH | 17,200 | 14933224 |
| 711734 | Mar 11, 2011 | Mar 11, 2011 | Enervest Operating, L.L.C. | Tree House #1H | 13,000 | 14933223 |
| 708343 | Jan 21, 2011 | Jan 21, 2011 | Southern Bay Operating, L.L.C. | Flatonia East Unit #2HH | 16,500 | 14933222 |
| 707211 | Dec 23, 2010 | Dec 23, 2010 | Denali Oil & Gas Management, LLC | Cherry Oil Unit #1HH | 9,000 | 14933185 |
| 706348 | Dec 7, 2010 | Dec 7, 2010 | Southern Bay Operating, L.L.C. | Flatonia East Unit #1HH | 16,500 | 14933221 |
| 706247 | Dec 6, 2010 | Dec 6, 2010 | Enervest Operating, L.L.C. | Walking Taller #1H | 13,100 | 14933220 |
| 701378 | Aug 31, 2010 | Aug 31, 2010 | American Disposal Services,ltd | Willy Wonka #1 | 4,500 | 14933219 |
| 700654 | Aug 16, 2010 | Aug 16, 2010 | Enervest Operating, L.L.C. | Flying Kyte #1H | 12,000 | 14933218 |
| 700654Amendment | Aug 16, 2010 | Aug 16, 2010 | Enervest Operating, L.L.C. | Flying Kyte #1H | 12,000 | 14933218 |
| 699438 | Jul 29, 2010 | Jul 29, 2010 | Denali Oil & Gas Management, LLC | Doms Unit #1HH | 9,000 | 14933217 |
| 698241 | Jun 30, 2010 | Jun 30, 2010 | Enervest Operating, L.L.C. | Vonrosenberg #1REH | 12,500 | 14932702 |
| 698241Amendment | Jun 30, 2010 | Jun 30, 2010 | Enervest Operating, L.L.C. | Vonrosenberg #1REH | 12,500 | 14932702 |
| 697196 | Jun 14, 2010 | Jun 14, 2010 | Warrior Resources Inc. | Barina #3 | 2,500 | 14933215 |
| 696354 | May 24, 2010 | May 24, 2010 | Browning Oil Company, Inc. | Russell Neel Unit #1R | 5,700 | 14932915 |
| 696022 | May 17, 2010 | May 17, 2010 | Research Exploration, LLC | Talley #1 | 13,200 | 14933214 |
| 696022Amendment | May 17, 2010 | May 17, 2010 | Research Exploration, LLC | Talley #1 | 13,200 | 14933214 |
| 695774 | May 14, 2010 | May 14, 2010 | Lama Energy, L.L.C. | Rightmer #1H | 8,000 | 14933212 |
| 695747 | May 14, 2010 | May 14, 2010 | Magnum Producing, LP | McKinney Unit #1 | 7,000 | 14933213 |
| 695747Amendment | May 14, 2010 | May 14, 2010 | Magnum Producing, LP | McKinney Unit #1 | 7,000 | 14933213 |
| 695477 | May 5, 2010 | May 5, 2010 | Lama Energy, L.L.C. | Newman Farms #1HH | 7,500 | 14933211 |
| 694465 | Apr 16, 2010 | Apr 16, 2010 | Research Exploration, LLC | Ethelmae #1 | 13,100 | 14932602 |
| 694465Amendment | Apr 16, 2010 | Apr 16, 2010 | Research Exploration, LLC | Ethelmae #1 | 13,200 | 14932602 |
| 690042 | Mar 12, 2010 | Mar 12, 2010 | Sellers Lease Service, Inc. | W.C.P. Unit #1H | 9,604 | 14932531 |
| 689977 | Jan 29, 2010 | Jan 29, 2010 | Magnum Producing, LP | Lehmann et Al #1 | 6,000 | 14933210 |
| 690209 | Jan 27, 2010 | Jan 27, 2010 | Enervest Operating, L.L.C. | Holmes Ranch "A" #2REH | 12,000 | 14932813 |
| 690115 | Jan 25, 2010 | Jan 25, 2010 | Weber Energy Corporation | Ivy #1HH | 9,000 | 14933209 |
| 689604 | Jan 20, 2010 | Jan 20, 2010 | Magnum Producing, LP | Royal et Al #1 | 7,600 | 14933208 |
| 688315 | Dec 18, 2009 | Dec 18, 2009 | Somont Oil Co., Inc. | McCandless Oil Pool #8 | 2,250 | 14932392 |
| 688113 | Dec 3, 2009 | Dec 3, 2009 | Lama Energy, L.L.C. | Vacek #1 HH | 7,200 | 14931887 |
| 687870 | Nov 24, 2009 | Nov 24, 2009 | Enervest Operating, L.L.C. | Bauer Unit #1REH | 13,000 | 14932937 |
| 686515 | Nov 13, 2009 | Nov 13, 2009 | Leexus Oil LLC | Bernshausen #1HH | 9,800 | 14932487 |
| 686893 | Nov 6, 2009 | Nov 6, 2009 | Weber Energy Corporation | Kay Lorenz #2HH | 8,000 | 14933207 |
| 686893Amendment | Nov 6, 2009 | Nov 6, 2009 | Weber Energy Corporation | Kay Lorenz #2HH | 8,000 | 14933207 |
| 686289 | Oct 21, 2009 | Oct 21, 2009 | Weber Energy Corporation | Holub #1HH | 9,200 | 14933206 |
| 685535 | Sep 25, 2009 | Sep 25, 2009 | Lama Energy, L.L.C. | Zimmerhanzel #1 HH | 7,275 | 14932443 |
| 684280 | Aug 25, 2009 | Aug 25, 2009 | Sto Operating Company | Victor Elias #1REH | 7,500 | 14930676 |
| 684280Amendment | Aug 25, 2009 | Aug 25, 2009 | Impetro Operating LLC | Victor Elias #1REH | 7,500 | 14930676 |
| 684245 | Aug 19, 2009 | Aug 19, 2009 | Weber Energy Corporation | Lorenz #1HH | 8,000 | 14933205 |
| 684245Amendment | Aug 19, 2009 | Aug 19, 2009 | Weber Energy Corporation | Lorenz #1HH | 8,000 | 14933205 |
| 684245Amendment | Aug 19, 2009 | Aug 19, 2009 | Weber Energy Corporation | Lorenz #1HH | 8,000 | 14933205 |
| 684159 | Aug 19, 2009 | Aug 19, 2009 | Enervest Operating, L.L.C. | Cruse-Lehmann Unit #1RE | 9,000 | 14932456 |
| 683119 | Aug 11, 2009 | Aug 11, 2009 | Enervest Operating, L.L.C. | Cedar Creek "B" Amarado Unit #2REH | 12,500 | 14932775 |
| 683119Amendment | Aug 11, 2009 | Aug 11, 2009 | Enervest Operating, L.L.C. | Cedar Creek "B" Amarado Unit #2REH | 12,500 | 14932775 |
| 683630 | Aug 4, 2009 | Aug 4, 2009 | Enervest Operating, L.L.C. | Patterson Unit #2REH | 14,000 | 14933198 |
| 682951 | Jul 14, 2009 | Jul 14, 2009 | Weber Energy Corporation | Cluck #1HH | 8,000 | 14933204 |
| 682951Amendment | Jul 14, 2009 | Jul 14, 2009 | Weber Energy Corporation | Cluck #1HH | 8,000 | 14933204 |
| 681973 | Jun 11, 2009 | Jun 11, 2009 | American Disposal Services,ltd | Lear #1 | 7,510 | 14931396 |
| 681954 | Jun 10, 2009 | Jun 10, 2009 | Enervest Operating, L.L.C. | Holmes Ranch #1REH | 13,000 | 14932754 |
| 673256Amendment | Jun 10, 2009 | Jun 10, 2009 | Somont Oil Co., Inc. | McCandless Oil Pool #9 | 2,500 | 14933202 |
| 630726Amendment | Apr 30, 2009 | Apr 30, 2009 | Sto Operating Company | Petrich-Lorenz #2 | 5,536 | 14932371 |
| 679999 | Apr 1, 2009 | Apr 1, 2009 | Young, John H., Inc. | Tye Unit #1 | 13,500 | 14933203 |
| 679999Amendment | Apr 1, 2009 | Apr 1, 2009 | Young, John H., Inc. | Tye Unit #1 | 13,500 | 14933203 |
| 679483 | Mar 17, 2009 | Mar 17, 2009 | Enervest Operating, L.L.C. | Noack-Zoch Unit #1REH | 11,000 | 14932496 |
| 677977 | Feb 19, 2009 | Feb 19, 2009 | Enervest Operating, L.L.C. | Bohot-Bohot Unit #1REH | 10,000 | 14932557 |
| 673253 | Dec 5, 2008 | Dec 5, 2008 | Somont Oil Co., Inc. | McCandless #10 | 3,000 | 14933201 |
| 673256 | Nov 13, 2008 | Nov 13, 2008 | Somont Oil Co., Inc. | McCandless Oil Pool #9 | 2,500 | 14933202 |
| 671324 | Nov 12, 2008 | Nov 12, 2008 | McA Petroleum Corporation | McCrory, Glen #1 | 2,000 | 14933200 |
| 666586 | Sep 25, 2008 | Sep 25, 2008 | McA Petroleum Corporation | Drenner, Mary Huff #23 | 2,300 | 14933197 |
| 666590 | Sep 9, 2008 | Sep 9, 2008 | McA Petroleum Corporation | Steinhauser, A.F. #12 | 2,375 | 14933199 |
| 669141 | Sep 6, 2008 | Sep 6, 2008 | Enervest Operating, L.L.C. | Patterson Unit #2H | 14,000 | 14933198 |
| 669141Amendment | Sep 6, 2008 | Sep 6, 2008 | Enervest Operating, L.L.C. | Patterson Unit #2H | 14,000 | 14933198 |
| 667388 | Aug 11, 2008 | Aug 11, 2008 | Apache Corporation | High Hill Creek E #1H | 14,000 | 14933196 |
| 667132 | Aug 5, 2008 | Aug 5, 2008 | Patterson Energy Corporation | Frierson #1 | 8,600 | 14933195 |
| 666887 | Aug 4, 2008 | Aug 4, 2008 | Apache Corporation | Mattingly #E 1H | 14,000 | 14933194 |
| 663212 | Jul 23, 2008 | Jul 23, 2008 | WCS Oil & Gas Corporation | Lyco #1HH | 12,500 | 14933192 |
| 663212Amendment | Jul 23, 2008 | Jul 23, 2008 | WCS Oil & Gas Corporation | Lyco #1HH | 12,500 | 14933192 |
| 664083 | Jun 26, 2008 | Jun 26, 2008 | Fintex Oil & Gas, Inc. | Tilicek #2 | 2,900 | 14933193 |
| 659734 | Apr 30, 2008 | Apr 30, 2008 | Enervest Operating, L.L.C. | Galloping Ghost Unit #2H | 13,000 | 14933191 |
| 659734Amendment | Apr 30, 2008 | Apr 30, 2008 | Enervest Operating, L.L.C. | Galloping Ghost Unit #2H | 13,000 | 14933191 |
| 659706 | Apr 28, 2008 | Apr 28, 2008 | Warrior Resources Inc. | Vinklarek #1 | 2,500 | 14933190 |
| 658552 | Apr 16, 2008 | Apr 16, 2008 | Young, John H., Inc. | Traci #2 | 13,500 | 14933189 |
| 658552Amendment | Apr 16, 2008 | Apr 16, 2008 | Young, John H., Inc. | Traci #2 | 13,500 | 14933189 |
| 657541 | Mar 28, 2008 | Mar 28, 2008 | Lama Energy, L.L.C. | Newman #2 HH | 7,900 | 14930565 |
| 657541Amendment | Mar 28, 2008 | Mar 28, 2008 | Lama Energy, L.L.C. | Newman #2 HH | 7,900 | 14930565 |
| 657416 | Mar 26, 2008 | Mar 26, 2008 | Enervest Operating, L.L.C. | Crazy Horse Unit #2H | 13,000 | 14933188 |
| 656867 | Mar 18, 2008 | Mar 18, 2008 | Fintex Oil & Gas, Inc. | Tilicek #1 | 2,800 | 14933187 |
| 654183 | Mar 11, 2008 | Mar 11, 2008 | Lama Energy, L.L.C. | Holmes #1 HH | 8,800 | 14930744 |
| 654183Amendment | Mar 11, 2008 | Mar 11, 2008 | Lama Energy, L.L.C. | Holmes #1 HH | 8,800 | 14930744 |
| 653876 | Feb 4, 2008 | Feb 4, 2008 | Lama Energy, L.L.C. | Pat #1HH | 7,500 | 14931939 |
| 653419 | Jan 29, 2008 | Jan 29, 2008 | Enervest Operating, L.L.C. | Lincoln OL Unit #1H | 12,000 | 14932846 |
| 650207 | Jan 15, 2008 | Jan 15, 2008 | Enervest Operating, L.L.C. | Pecan Creek #1HH | 14,000 | 14932936 |
| 650114 | Jan 2, 2008 | Jan 2, 2008 | Magnum Producing, LP | Katherine #1HH | 8,650 | 14932037 |
| 649841 | Dec 28, 2007 | Dec 28, 2007 | Evolution Operating Co., Inc. | Margaret #1REH | 13,000 | 14932659 |