| 637681 | May 3, 2007 | May 3, 2007 | Kerr-McGee Oil & Gas Onshore LP | TCR Speer-State #2 | 7,800 | 42733139 |
| 637681Amendment | May 3, 2007 | May 3, 2007 | Kerr-McGee Oil & Gas Onshore LP | TCR Speer-State #2 | 7,800 | 42733139 |
| 637806 | May 2, 2007 | May 2, 2007 | Edge Petroleum Oper. Co., Inc. | Bloomberg, Samuel D. #51 | 11,500 | 42734116 |
| 637806Amendment | May 2, 2007 | May 2, 2007 | Edge Petroleum Oper. Co., Inc. | Bloomberg, Samuel D. #51 | 11,500 | 42734116 |
| 637700 | May 1, 2007 | May 1, 2007 | Shell Western E&P | Slick, T. B. Estate 533 #2 | 12,000 | 42734114 |
| 637264 | Apr 24, 2007 | Apr 24, 2007 | Kebo Oil & Gas, Inc. | Pistol Hill #2 | 2,000 | 42734113 |
| 637264Amendment | Apr 24, 2007 | Apr 24, 2007 | Kebo Oil & Gas, Inc. | Pistol Hill 2 #2 | 2,000 | 42734113 |
| 634741 | Apr 24, 2007 | Apr 24, 2007 | BPL Exploration, Ltd. | Martinez #2 | 6,550 | 42733954 |
| 637170 | Apr 20, 2007 | Apr 20, 2007 | Metano Energy, LP | Lopez Gas Unit #1 | 9,500 | 42734112 |
| 636555 | Apr 12, 2007 | Apr 12, 2007 | EOG Resources, Inc. | Amaro Salinas GU #1 | 14,000 | 42734111 |
| 636488 | Apr 10, 2007 | Apr 10, 2007 | Edge Petroleum Oper. Co., Inc. | Kent #2 | 9,500 | 42734110 |
| 636412 | Apr 10, 2007 | Apr 10, 2007 | Houston Exploration Company, The | Slick, T. B. Estate "a" 529 #237 | 9,000 | 42734109 |
| 636215 | Apr 5, 2007 | Apr 5, 2007 | Houston Exploration Company, The | Slick, T. B. Estate "B" 536 #236 | 9,000 | 42734108 |
| 635954 | Apr 2, 2007 | Apr 2, 2007 | Shell Western E&P | Slick, T. B. Estate #180 | 11,500 | 42734107 |
| 635952 | Apr 2, 2007 | Apr 2, 2007 | Shell Western E&P | Davenport, O. H. Heirs #5 | 13,500 | 42732433 |
| 635849 | Mar 30, 2007 | Mar 30, 2007 | EOG Resources, Inc. | Munoz "a" GU #1 | 8,500 | 42734106 |
| 635439 | Mar 26, 2007 | Mar 26, 2007 | Newgulf Petroleum, LLC | Margo #11 | 4,500 | 42734105 |
| 635370 | Mar 22, 2007 | Mar 22, 2007 | Shell Western E&P | Slick, T. B. Estate #181 | 13,500 | 42734104 |
| 635217 | Mar 22, 2007 | Mar 22, 2007 | Kerr-McGee Oil & Gas Onshore LP | Hermann, E. #14 | 9,500 | 42734103 |
| 635215 | Mar 22, 2007 | Mar 22, 2007 | Kerr-McGee Oil & Gas Onshore LP | Hermann, E. #13 | 9,500 | 42734102 |
| 635195 | Mar 22, 2007 | Mar 22, 2007 | Kerr-McGee Oil & Gas Onshore LP | Orive, A. #10 | 9,000 | 42734100 |
| 635061 | Mar 20, 2007 | Mar 20, 2007 | Kebo Oil & Gas, Inc. | Una de Gato #1 | 9,000 | 42734098 |
| 635068 | Mar 19, 2007 | Mar 19, 2007 | Petrohawk Operating Company | Mulholland, Etal #1 | 11,300 | 42734099 |
| 634886 | Mar 19, 2007 | Mar 19, 2007 | Kerr-McGee Oil & Gas Onshore LP | De Garcia, B. G. #70 | 9,300 | 42734097 |
| 635209 | Mar 16, 2007 | Mar 16, 2007 | Ricochet Energy, Inc. | D. Salinas #1 | 12,500 | 42734101 |
| 635209Amendment | Mar 16, 2007 | Mar 16, 2007 | Ricochet Energy, Inc. | Salinas, D. #1 | 12,500 | 42734101 |
| 634816 | Mar 14, 2007 | Mar 14, 2007 | Shell Western E&P | Bentsen Bros.-State #13 | 11,100 | 42734096 |
| 634700 | Mar 13, 2007 | Mar 13, 2007 | Houston Exploration Company, The | T. B. Slick Estate "B" 534 Dr #235 | 9,500 | 42734095 |
| 633957 | Feb 27, 2007 | Feb 27, 2007 | Metano Energy, LP | Heard #1 | 13,000 | 42734094 |
| 633859 | Feb 23, 2007 | Feb 23, 2007 | Mortimer Production Company | Hiles/Garza #1 | 5,230 | 42733881 |
| 633859Amendment | Feb 23, 2007 | Feb 23, 2007 | Mortimer Production Company | Hiles/Garza #1 | 5,230 | 42733881 |
| 633544 | Feb 16, 2007 | Feb 16, 2007 | EOG Resources, Inc. | Southwest Texas Corp F #8 | 10,200 | 42734093 |
| 633087 | Feb 13, 2007 | Feb 13, 2007 | Shell Western E&P | Thomas-Rife Gas Unit #17 | 10,250 | 42734092 |
| 632494 | Feb 12, 2007 | Feb 12, 2007 | Ascent Operating, LP | Garza-Hitchcock et al G. U. #13 | 10,600 | 42734091 |
| 632452 | Feb 12, 2007 | Feb 12, 2007 | Ascent Operating, LP | Garza-Hitchcock et al G. U. #12 | 10,500 | 42734090 |
| 629494 | Feb 10, 2007 | Feb 10, 2007 | Trap Rock Oil, Ltd. | La Brisa Ranch / State 542 #18 | 5,200 | 42703613 |
| 633059 | Feb 8, 2007 | Feb 8, 2007 | Shell Western E&P | Slick, T.B. Estate #179 | 16,800 | 42734089 |
| 632929 | Feb 6, 2007 | Feb 6, 2007 | Kerr-McGee Oil & Gas Onshore LP | Frost National Bank -A- #13 | 11,000 | 42734088 |
| 632666 | Feb 5, 2007 | Feb 5, 2007 | El Paso E & P Company, L. P. | State Park #11 | 13,500 | 42734086 |
| 632666Amendment | Feb 5, 2007 | Feb 5, 2007 | El Paso E & P Company, L. P. | State Park #11 | 13,500 | 42734086 |
| 632666Amendment | Feb 5, 2007 | Feb 5, 2007 | El Paso E & P Company, L. P. | State Park #11 | 13,500 | 42734086 |
| 632750 | Feb 2, 2007 | Feb 2, 2007 | Kerr-McGee Oil & Gas Onshore LP | Frost National Bank -A- #14 | 10,800 | 42734087 |
| 632750Amendment | Feb 2, 2007 | Feb 2, 2007 | Kerr-McGee Oil & Gas Onshore LP | Frost National Bank -A- #14 | 9,000 | 42734087 |
| 632556 | Jan 29, 2007 | Jan 29, 2007 | Kerr-McGee Oil & Gas Onshore LP | Frost National Bank -A- #10 | 9,792 | 42734003 |
| 632488 | Jan 26, 2007 | Jan 26, 2007 | Houston Exploration Company, The | Slick, T. B. Estate "B" 536 #206 | 9,600 | 42734085 |
| 632467 | Jan 26, 2007 | Jan 26, 2007 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #605 | 12,000 | 42734083 |
| 632395 | Jan 26, 2007 | Jan 26, 2007 | Comstock Oil & Gas, LP | Lopez Gas Unit 1 #1 | 7,320 | 42733608 |
| 631430 | Jan 26, 2007 | Jan 26, 2007 | El Paso E & P Company, L. P. | USA #101 | 10,443 | 42732537 |
| 630341 | Jan 25, 2007 | Jan 25, 2007 | Kerr-McGee Oil & Gas Onshore LP | Reilly Heirs #33 | 9,500 | 42734069 |
| 631899 | Jan 18, 2007 | Jan 18, 2007 | Houston Exploration Company, The | T. B. Slick Estate "B" 536 #233 | 9,000 | 42734082 |
| 631788 | Jan 12, 2007 | Jan 12, 2007 | Shell Western E&P | Slick, T. B. Estate #178 | 13,000 | 42734081 |
| 631788Amendment | Jan 12, 2007 | Jan 12, 2007 | Shell Western E&P | Slick, T. B. Estate #178 | 13,000 | 42734081 |
| 631680 | Jan 11, 2007 | Jan 11, 2007 | Houston Exploration Company, The | T. B. Slick Estate "B" 536 #234 | 9,000 | 42734080 |
| 631547 | Jan 9, 2007 | Jan 9, 2007 | Newfield Exploration Company | Guerra, R.R. #1 | 19,500 | 42734079 |
| 631458 | Jan 9, 2007 | Jan 9, 2007 | Noble Energy Inc | Martinez -B- #53 | 7,900 | 42733087 |
| 630977 | Dec 27, 2006 | Dec 27, 2006 | Smith Production Inc. | Btlt A #5 | 13,500 | 42734078 |
| 630924 | Dec 21, 2006 | Dec 21, 2006 | Petrohawk Operating Company | Cleopatra #8 | 12,500 | 42734077 |
| 630845 | Dec 21, 2006 | Dec 21, 2006 | Shell Western E&P | Slick, T. B. Estate #176 | 11,000 | 42734076 |
| 630649 | Dec 18, 2006 | Dec 18, 2006 | Metano Energy, LP | La Brisa Ranch -A- #1 | 6,500 | 42734075 |
| 630610 | Dec 18, 2006 | Dec 18, 2006 | Kerr-McGee Oil & Gas Onshore LP | Hall, J. F.-State #29 | 9,500 | 42734074 |
| 630384 | Dec 13, 2006 | Dec 13, 2006 | Kerr-McGee Oil & Gas Onshore LP | Garcia L&L Co. -C- #18 | 9,500 | 42734071 |
| 630384Amendment | Dec 13, 2006 | Dec 13, 2006 | Kerr-McGee Oil & Gas Onshore LP | Garcia L & L Co. -C- #18 | 9,500 | 42734071 |
| 630393 | Dec 12, 2006 | Dec 12, 2006 | Shell Western E&P | Judd Estate-State #15 | 21,000 | 42734072 |
| 630376 | Dec 12, 2006 | Dec 12, 2006 | Shell Western E&P | Slick, T. B. Estate #175 | 13,500 | 42734070 |
| 630340 | Dec 12, 2006 | Dec 12, 2006 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #602 | 11,000 | 42734068 |
| 630254 | Dec 11, 2006 | Dec 11, 2006 | Shell Western E&P | Slick, T.B. Estate #177 | 11,000 | 42734067 |
| 630254Amendment | Dec 11, 2006 | Dec 11, 2006 | Shell Western E&P | Slick, T. B. Estate #177 | 11,000 | 42734067 |
| 629766 | Dec 1, 2006 | Dec 1, 2006 | EOG Resources, Inc. | Billups #2 | 8,500 | 42734066 |
| 629620 | Nov 30, 2006 | Nov 30, 2006 | Neuhaus, V. F. Properties, Inc. | Farias Unit #5 | 4,600 | 42734065 |
| 629502 | Nov 27, 2006 | Nov 27, 2006 | Shell Western E&P | Emma Pena Gas Unit #2 | 10,800 | 42734064 |
| 629291 | Nov 21, 2006 | Nov 21, 2006 | Shell Western E&P | Slick, T. B. Estate #174 | 13,830 | 42734063 |
| 628243 | Nov 21, 2006 | Nov 21, 2006 | Houston Exploration Company, The | Slick, T. B. Estate "B-222" #228 | 7,700 | 42734052 |
| 628243Amendment | Nov 21, 2006 | Nov 21, 2006 | Houston Exploration Company, The | Slick, T. B. Estate "B-222" #228 | 7,700 | 42734052 |
| 629164 | Nov 17, 2006 | Nov 17, 2006 | Kerr-McGee Oil & Gas Onshore LP | Frost National Bank -A- #12 | 11,000 | 42734062 |
| 629135 | Nov 17, 2006 | Nov 17, 2006 | EOG Resources, Inc. | Romeo Garza #2 | 8,500 | 42734061 |
| 629133 | Nov 17, 2006 | Nov 17, 2006 | EOG Resources, Inc. | McClure #5 | 8,500 | 42734060 |
| 621794 | Nov 14, 2006 | Nov 14, 2006 | Trap Rock Oil, Ltd. | La Brisa Ranch / State 542 #15 | 5,500 | 42703610 |
| 628632 | Nov 9, 2006 | Nov 9, 2006 | Houston Exploration Company, The | T. B. Slick Estate #175 Unit #223 | 8,300 | 42734057 |
| 628648 | Nov 7, 2006 | Nov 7, 2006 | Houston Exploration Company, The | T. B. Slick Estate "B-266" #232 | 7,000 | 42734059 |
| 628644 | Nov 7, 2006 | Nov 7, 2006 | Houston Exploration Company, The | T. B. Slick Estate "B" 536 #231 | 9,000 | 42734058 |
| 628569 | Nov 6, 2006 | Nov 6, 2006 | EOG Resources, Inc. | McClure North #1 | 11,000 | 42733897 |
| 628415 | Nov 2, 2006 | Nov 2, 2006 | El Paso E & P Company, L. P. | State Park #9 | 13,500 | 42734056 |
| 628402 | Nov 2, 2006 | Nov 2, 2006 | EOG Resources, Inc. | McClure #6 | 8,500 | 42734055 |
| 628277 | Oct 31, 2006 | Oct 31, 2006 | Houston Exploration Company, The | Cameron, W. I. 138 #25 | 6,350 | 42732587 |
| 628271 | Oct 30, 2006 | Oct 30, 2006 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #603 | 11,000 | 42734054 |
| 628259 | Oct 30, 2006 | Oct 30, 2006 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #601 | 11,800 | 42734053 |
| 628086 | Oct 26, 2006 | Oct 26, 2006 | Kerr-McGee Oil & Gas Onshore LP | Chapotal Land Co. -B- #25 | 5,100 | 42733564 |
| 628001 | Oct 24, 2006 | Oct 24, 2006 | Mortimer Production Company | Guerra #4 | 6,000 | 42734051 |
| 627936 | Oct 23, 2006 | Oct 23, 2006 | EOG Resources, Inc. | Garza, Romeo #1 | 8,500 | 42734050 |
| 627620 | Oct 18, 2006 | Oct 18, 2006 | Metano Energy, LP | Starrpro Minerals #1 | 8,950 | 42734048 |
| 627693 | Oct 17, 2006 | Oct 17, 2006 | El Paso E & P Company, L. P. | Zamora State #10 | 12,000 | 42734049 |
| 627412 | Oct 12, 2006 | Oct 12, 2006 | Kerr-McGee Oil & Gas Onshore LP | Hall, C.M. #16 | 7,180 | 42732364 |
| 627378 | Oct 12, 2006 | Oct 12, 2006 | Metano Energy, LP | Flores Gas Unit #1 | 12,200 | 42733842 |
| 627350 | Oct 11, 2006 | Oct 11, 2006 | Shell Western E&P | Slick, T. B. Estate #173 | 11,700 | 42734047 |
| 627104 | Oct 5, 2006 | Oct 5, 2006 | Shell Western E&P | Bentson Brothers-State #14 | 11,500 | 42734046 |
| 627103 | Oct 5, 2006 | Oct 5, 2006 | Houston Exploration Company, The | Slick, T. B. Estate "B-222" #229 | 3,900 | 42734045 |
| 627045 | Oct 5, 2006 | Oct 5, 2006 | Newfield Exploration Company | F. B. Guerra #1 | 12,500 | 42734044 |
| 626975 | Oct 4, 2006 | Oct 4, 2006 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #600 | 10,000 | 42734043 |
| 626975Amendment | Oct 4, 2006 | Oct 4, 2006 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #600 | 11,500 | 42734043 |
| 626477 | Sep 25, 2006 | Sep 25, 2006 | Metano Energy, LP | Semmes #2 | 8,900 | 42734042 |