| 556972Amendment | Jun 7, 2005 | Jun 7, 2005 | Cody Energy LLC | Palmyra #1150535203 | 14,000 |
| 561141 | Jun 2, 2005 | Jun 2, 2005 | Houston Exploration Company, The | Alfonso #3550535270 | 10,320 |
| 601441 | Jun 1, 2005 | Jun 1, 2005 | Dominion Expl. & Prod., Inc. | Veleno Ranch #650535294 | 10,650 |
| 600170 | Jun 1, 2005 | Jun 1, 2005 | Houston Exploration Company, The | Alfonso #3650535275 | 10,320 |
| 601398 | May 31, 2005 | May 31, 2005 | Houston Exploration Company, The | Red Crest Trust #150535293 | 12,400 |
| 601237Amendment | May 26, 2005 | May 26, 2005 | Houston Exploration Company, The | Rodriguez Gas Unit #1550535292 | 14,800 |
| 601229 | May 25, 2005 | May 25, 2005 | Chesapeake Operating, Inc. | O. M. Laurel Estate #650535291 | 14,000 |
| 601229Amendment | May 25, 2005 | May 25, 2005 | Chesapeake Operating, Inc. | O. M. Laurel Estate #650535291 | 14,000 |
| 601193 | May 25, 2005 | May 25, 2005 | EOG Resources, Inc. | Gutierrez, Higinio Jr. #A 150535289 | 13,500 |
| 601189 | May 25, 2005 | May 25, 2005 | Chesapeake Operating, Inc. | Las Ovejas-State #250535288 | 14,000 |
| 601189Amendment | May 25, 2005 | May 25, 2005 | Chesapeake Operating, Inc. | Las Ovejas-State #250535288 | 14,000 |
| 601182 | May 25, 2005 | May 25, 2005 | Houston Exploration Company, The | J. M. Gutierrez #1750535290 | 13,400 |
| 601153 | May 24, 2005 | May 24, 2005 | Chesapeake Operating, Inc. | Gonzalez, Horacio #350535287 | 12,000 |
| 560205 | May 19, 2005 | May 19, 2005 | Houston Exploration Company, The | Alfonso #3450535259 | 10,320 |
| 600836 | May 18, 2005 | May 18, 2005 | Reichmann Petroleum Corp. | Martinez #150535286 | 10,500 |
| 600793 | May 18, 2005 | May 18, 2005 | Conocophillips Company | Cassin, Edward A #350535285 | 12,600 |
| 600793Amendment | May 18, 2005 | May 18, 2005 | Conocophillips Company | Cassin, Edward A #350535285 | 12,600 |
| 600704 | May 16, 2005 | May 16, 2005 | Laredo Energy | San Fernando #250535283 | 11,000 |
| 600704Amendment | May 16, 2005 | May 16, 2005 | Laredo Energy | San Fernando #250535283 | 11,000 |
| 600702 | May 16, 2005 | May 16, 2005 | Laredo Energy | San Fernando #150535282 | 11,000 |
| 600674 | May 16, 2005 | May 16, 2005 | United Resources LP | Vela, Herminia #150535284 | 12,500 |
| 560206 | May 16, 2005 | May 16, 2005 | Houston Exploration Company, The | Asche #10350535260 | 13,500 |
| 560199 | May 16, 2005 | May 16, 2005 | Ipact | Gonzalez, Graciela #150530551 | 8,324 |
| 600314 | May 6, 2005 | May 6, 2005 | Houston Exploration Company, The | Asche #10450535279 | 13,900 |
| 600314Amendment | May 6, 2005 | May 6, 2005 | Houston Exploration Company, The | Asche #10450535279 | 13,900 |
| 600301 | May 6, 2005 | May 6, 2005 | Chesapeake Operating, Inc. | Roy Jennings #950535278 | 12,000 |
| 600297 | May 5, 2005 | May 5, 2005 | Chesapeake Operating, Inc. | O. M. Laurel Estate #550535277 | 14,000 |
| 600250 | May 5, 2005 | May 5, 2005 | Houston Exploration Company, The | Ramirez, M. #250535276 | 10,300 |
| 600250Amendment | May 5, 2005 | May 5, 2005 | Houston Exploration Company, The | Ramirez, M. #250535276 | 10,300 |
| 600250Amendment | May 5, 2005 | May 5, 2005 | Houston Exploration Company, The | Ramirez, M. #250535276 | 10,300 |
| 600113 | May 3, 2005 | May 3, 2005 | EOG Resources, Inc. | Moffatt, Elza Gutierrez #450535274 | 11,200 |
| 600093 | May 3, 2005 | May 3, 2005 | Chesapeake Operating, Inc. | RMT "A" #250535273 | 12,000 |
| 561184 | May 2, 2005 | May 2, 2005 | Houston Exploration Company, The | Dominguez #150535271 | 13,200 |
| 561029 | May 2, 2005 | May 2, 2005 | Newfield Exploration Company | Villarreal #150535269 | 11,000 |
| 561292 | Apr 29, 2005 | Apr 29, 2005 | EOG Resources, Inc. | Garza, L. #3650535272 | 12,100 |
| 561136 | Apr 27, 2005 | Apr 27, 2005 | Elliott Oil & Gas Operating Co. | Frost National Bank #150530077 | 9,060 |
| 561109 | Apr 27, 2005 | Apr 27, 2005 | Houston Exploration Company, The | Rodriguez Gas Unit #350533030 | 14,100 |
| 560998 | Apr 25, 2005 | Apr 25, 2005 | Chesapeake Operating, Inc. | Villerreal, Olegario #150535268 | 14,000 |
| 560811 | Apr 25, 2005 | Apr 25, 2005 | Dominion Expl. & Prod., Inc. | Ramirez, Blas #650533759 | 8,000 |
| 560684 | Apr 25, 2005 | Apr 25, 2005 | Houston Exploration Company, The | Haynes #2350534672 | 14,500 |
| 560815 | Apr 22, 2005 | Apr 22, 2005 | Conocophillips Company | Las Palomas #350535267 | 13,600 |
| 560779 | Apr 22, 2005 | Apr 22, 2005 | Conocophillips Company | Laurel Mineral Estate #750535266 | 12,700 |
| 560779Amendment | Apr 22, 2005 | Apr 22, 2005 | Conocophillips Company | Laurel Mineral Estate #750535266 | 12,700 |
| 548603Amendment | Apr 22, 2005 | Apr 22, 2005 | Conocophillips Company | Laurel Mineral Estate #250535058 | 12,600 |
| 560803 | Apr 20, 2005 | Apr 20, 2005 | Chesapeake Operating, Inc. | De Dios, Juan #550535265 | 15,000 |
| 559456 | Apr 19, 2005 | Apr 19, 2005 | Houston Exploration Company, The | Cuellar, Maria #1650535244 | 10,200 |
| 560527 | Apr 15, 2005 | Apr 15, 2005 | Devon Energy Production Co, L.P. | Jennings #3850531037 | 9,257 |
| 560482 | Apr 14, 2005 | Apr 14, 2005 | Denali Oil & Gas Management, LLC | Gonzales Benavides Trust #150535264 | 10,500 |
| 560482Amendment | Apr 14, 2005 | Apr 14, 2005 | Denali Oil & Gas Management, LLC | Gonzales Benavides Trust #150535264 | 10,500 |
| 560482Amendment | Apr 14, 2005 | Apr 14, 2005 | Denali Oil & Gas Management, LLC | Gonzales Benavides Trust #150535264 | 10,500 |
| 560279 | Apr 14, 2005 | Apr 14, 2005 | Merit Energy Company | Trevino 64 #450535262 | 2,800 |
| 560274 | Apr 13, 2005 | Apr 13, 2005 | Merit Energy Company | Trevino 64 #550535261 | 2,800 |
| 560274Amendment | Apr 13, 2005 | Apr 13, 2005 | Merit Energy Company | Trevino 64 #550535261 | 3,200 |
| 559182 | Apr 13, 2005 | Apr 13, 2005 | Houston Exploration Company, The | Asche #10250535239 | 13,500 |
| 560341 | Apr 12, 2005 | Apr 12, 2005 | Newfield Exploration Company | Trevino #150535263 | 17,000 |
| 560272 | Apr 11, 2005 | Apr 11, 2005 | Shell Western E&P | Leyendecker, G.L. #250531597 | 16,900 |
| 558979 | Apr 11, 2005 | Apr 11, 2005 | Houston Exploration Company, The | Asche #10050535237 | 13,100 |
| 560146 | Apr 8, 2005 | Apr 8, 2005 | Chesapeake Operating, Inc. | Veleno #750535257 | 14,000 |
| 560092 | Apr 8, 2005 | Apr 8, 2005 | Dominion Expl. & Prod., Inc. | Ramos, Baltazar #750535256 | 12,700 |
| 560039 | Apr 6, 2005 | Apr 6, 2005 | Westport Oil and Gas Company, LP | Garza #150535253 | 2,000 |
| 560038 | Apr 6, 2005 | Apr 6, 2005 | Westport Oil and Gas Company, LP | Trevino #450535254 | 2,000 |
| 560038Amendment | Apr 6, 2005 | Apr 6, 2005 | Westport Oil and Gas Company, LP | Trevino #450535254 | 2,000 |
| 560037 | Apr 6, 2005 | Apr 6, 2005 | Westport Oil and Gas Company, LP | Trevino #350535255 | 2,000 |
| 559904 | Apr 4, 2005 | Apr 4, 2005 | Chesapeake Operating, Inc. | De Dios, Juan #450535252 | 13,000 |
| 559903 | Apr 4, 2005 | Apr 4, 2005 | Chesapeake Operating, Inc. | Flores, Carmen #150535251 | 13,000 |
| 559840 | Apr 1, 2005 | Apr 1, 2005 | Chesapeake Operating, Inc. | Gutierrez #350535250 | 13,000 |
| 559787 | Mar 31, 2005 | Mar 31, 2005 | Peoples Energy Prod.-TX, L.P. | Vela B #750535249 | 11,000 |
| 559774 | Mar 31, 2005 | Mar 31, 2005 | Killam Oil Co., Ltd. | De Gracia Heirs #450535248 | 13,500 |
| 559774Amendment | Mar 31, 2005 | Mar 31, 2005 | Killam Oil Co., Ltd. | De Gracia Heirs #450535248 | 13,800 |
| 559747 | Mar 31, 2005 | Mar 31, 2005 | Chesapeake Operating, Inc. | Laurel, O. M. Estate #450535247 | 14,000 |
| 559510 | Mar 24, 2005 | Mar 24, 2005 | Richman Petroleum Corp. | La Duquesa #150535245 | 12,500 |
| 559509 | Mar 24, 2005 | Mar 24, 2005 | Peoples Energy Prod.-TX, L.P. | Guerra "L" #750535246 | 9,500 |
| 559299 | Mar 24, 2005 | Mar 24, 2005 | Wagner Oil Company | Slator Ranch #3050535241 | 11,000 |
| 559299Amendment | Mar 24, 2005 | Mar 24, 2005 | Wagner Oil Company | Slator Ranch #3050535241 | 12,000 |
| 559400 | Mar 23, 2005 | Mar 23, 2005 | Chesapeake Operating, Inc. | RMT "C" #150535243 | 14,000 |
| 559296 | Mar 23, 2005 | Mar 23, 2005 | Houston Exploration Company, The | Benavides, B. R. #750535240 | 12,900 |
| 559324 | Mar 22, 2005 | Mar 22, 2005 | Houston Exploration Company, The | Trevino #2550535242 | 10,000 |
| 557954 | Mar 18, 2005 | Mar 18, 2005 | Houston Exploration Company, The | Leonardo #4250535221 | 13,400 |
| 557948 | Mar 18, 2005 | Mar 18, 2005 | Houston Exploration Company, The | Asche #9950535222 | 12,900 |
| 559058 | Mar 16, 2005 | Mar 16, 2005 | Houston Exploration Company, The | Asche #10150535238 | 13,400 |
| 559036 | Mar 15, 2005 | Mar 15, 2005 | Shell Western E&P | Zachry, H.B. Company #2ST50531567 | 18,075 |
| 558940 | Mar 14, 2005 | Mar 14, 2005 | Chesapeake Operating, Inc. | Vela, L. G. #450535236 | 14,000 |
| 558785 | Mar 9, 2005 | Mar 9, 2005 | Laredo Energy | Gutierrez Unit #250535235 | 11,000 |
| 558755 | Mar 9, 2005 | Mar 9, 2005 | United Resources LP | Garcia #150535234 | 12,200 |
| 558615 | Mar 7, 2005 | Mar 7, 2005 | Chesapeake Operating, Inc. | New Zapata East Gas Unit #350535232 | 13,000 |
| 558562 | Mar 7, 2005 | Mar 7, 2005 | Wagner Oil Company | Slator Ranch #2950535233 | 11,000 |
| 558562Amendment | Mar 7, 2005 | Mar 7, 2005 | Wagner Oil Company | Slator Ranch #2950535233 | 12,000 |
| 558401 | Mar 7, 2005 | Mar 7, 2005 | Dominion Expl. & Prod., Inc. | Guerra, Raul #1250535228 | 10,600 |
| 558456 | Mar 4, 2005 | Mar 4, 2005 | Conocophillips Company | Cassin, Edward #550535231 | 12,900 |
| 558510 | Mar 3, 2005 | Mar 3, 2005 | Laredo Energy | Ranchito "B" Gas Unit #150535230 | 11,200 |
| 558469 | Mar 3, 2005 | Mar 3, 2005 | Chevron U. S. A. Inc. | Vela, J.M. #1550535229 | 9,900 |
| 556912 | Mar 3, 2005 | Mar 3, 2005 | Houston Exploration Company, The | Rodriguez Gas Unit #1450535201 | 14,900 |
| 557220 | Mar 1, 2005 | Mar 1, 2005 | Houston Exploration Company, The | Asche #9550535207 | 12,800 |
| 557199 | Mar 1, 2005 | Mar 1, 2005 | Cody Energy LLC | Palmyra #1450535205 | 14,000 |
| 558125 | Feb 24, 2005 | Feb 24, 2005 | Houston Exploration Company, The | Asche #9850535227 | 10,600 |
| 558055 | Feb 23, 2005 | Feb 23, 2005 | Houston Exploration Company, The | Asche #9750535226 | 10,500 |
| 556911 | Feb 23, 2005 | Feb 23, 2005 | Houston Exploration Company, The | Flores, L. G. #4550535202 | 14,400 |
| 556379 | Feb 23, 2005 | Feb 23, 2005 | North Central Oil Corp. | Haynes, L. #14650535193 | 10,900 |
| 558014 | Feb 22, 2005 | Feb 22, 2005 | Newfield Exploration Company | Lopez Tract 2 #150535225 | 13,000 |
| 558013 | Feb 22, 2005 | Feb 22, 2005 | Newfield Exploration Company | Lopez Tract 1 #250535224 | 13,000 |