| 533786 | Jul 3, 2003 | Jul 3, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A104H37500259 | 3,600 |
| 533763 | Jul 3, 2003 | Jul 3, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A185H37531382 | 3,600 |
| 533440 | Jun 24, 2003 | Jun 24, 2003 | Pioneer Natural Res. USA, Inc. | Crawford #B 3H37531380 | 3,400 |
| 533390 | Jun 23, 2003 | Jun 23, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 94H37530038 | 3,600 |
| 533334 | Jun 20, 2003 | Jun 20, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A116H37500091 | 3,600 |
| 532363 | May 28, 2003 | May 28, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A 51H37500115 | 3,500 |
| 532330 | May 27, 2003 | May 27, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 90H37500093 | 3,500 |
| 532042 | May 20, 2003 | May 20, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #J 5H37500098 | 3,500 |
| 531716 | May 9, 2003 | May 9, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #N 237531658 | 3,400 |
| 531675 | May 9, 2003 | May 9, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B12837531657 | 3,400 |
| 531670 | May 9, 2003 | May 9, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A157H37500191 | 3,600 |
| 531671 | May 8, 2003 | May 8, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B12937531656 | 3,400 |
| 531649 | May 8, 2003 | May 8, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B12737531655 | 3,500 |
| 531618 | May 7, 2003 | May 7, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A23437531654 | 3,500 |
| 531618Amendment | May 7, 2003 | May 7, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A23437531654 | 3,500 |
| 531610 | May 6, 2003 | May 6, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A23337531653 | 3,400 |
| 531415 | May 5, 2003 | May 5, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 44H37500311 | 3,600 |
| 531291 | May 1, 2003 | May 1, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 23H37500271 | 3,650 |
| 528978 | May 1, 2003 | May 1, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 11H37500258 | 3,650 |
| 531122 | Apr 28, 2003 | Apr 28, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 99H37530141 | 3,600 |
| 530981 | Apr 23, 2003 | Apr 23, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B112H37531500 | 3,000 |
| 530238 | Apr 3, 2003 | Apr 3, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 82H37500285 | 3,500 |
| 530203 | Apr 3, 2003 | Apr 3, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 16H37500300 | 3,000 |
| 529684 | Mar 18, 2003 | Mar 18, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #J 10H37531209 | 3,600 |
| 529531 | Mar 14, 2003 | Mar 14, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B114H37531507 | 3,000 |
| 529523 | Mar 14, 2003 | Mar 14, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 52H37500160 | 3,500 |
| 529117 | Mar 4, 2003 | Mar 4, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A 42H37500340 | 3,650 |
| 529049 | Mar 4, 2003 | Mar 4, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A 46H37500099 | 3,650 |
| 529043 | Mar 4, 2003 | Mar 4, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 29H37500178 | 3,650 |
| 529006 | Mar 3, 2003 | Mar 3, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 73H37500227 | 3,650 |
| 528994 | Mar 3, 2003 | Mar 3, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 20H37500198 | 3,650 |
| 528990 | Feb 28, 2003 | Feb 28, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 3H37500485 | 3,650 |
| 528905 | Feb 28, 2003 | Feb 28, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 59H37500127 | 3,500 |
| 528720 | Feb 21, 2003 | Feb 21, 2003 | Pioneer Natural Res. USA, Inc. | Bradley #A 1H37500083 | 3,500 |
| 528690 | Feb 21, 2003 | Feb 21, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 66H37500366 | 3,200 |
| 526886 | Feb 20, 2003 | Feb 20, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 31H37500284 | 3,000 |
| 528178 | Feb 10, 2003 | Feb 10, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #A 48H37531502 | 3,500 |
| 527894 | Jan 31, 2003 | Jan 31, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 57H37500293 | 3,300 |
| 527681 | Jan 30, 2003 | Jan 30, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #12637531652 | 385 |
| 527399 | Jan 22, 2003 | Jan 22, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A 70H37500089 | 3,500 |
| 527432 | Jan 21, 2003 | Jan 21, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 46H37500324 | 3,700 |
| 527084 | Jan 16, 2003 | Jan 16, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A208H37531492 | 3,000 |
| 527071 | Jan 16, 2003 | Jan 16, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A165H37500348 | 3,000 |
| 527069 | Jan 16, 2003 | Jan 16, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A 49H37500372 | 3,000 |
| 527311 | Jan 15, 2003 | Jan 15, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 49H37500315 | 3,500 |
| 527159 | Jan 10, 2003 | Jan 10, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #A 9H37500217 | 3,200 |
| 527155 | Jan 10, 2003 | Jan 10, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 13H37500262 | 3,000 |
| 527154 | Jan 10, 2003 | Jan 10, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 93H37500263 | 3,100 |
| 527152 | Jan 10, 2003 | Jan 10, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 26H37500274 | 3,200 |
| 527034 | Jan 9, 2003 | Jan 9, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 25H37500269 | 3,000 |
| 526982 | Jan 8, 2003 | Jan 8, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A136H37500147 | 3,000 |
| 526960 | Jan 7, 2003 | Jan 7, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A 53H37500380 | 3,100 |
| 526947 | Jan 7, 2003 | Jan 7, 2003 | Pioneer Natural Res. USA, Inc. | Bivins #A166H37500376 | 3,000 |
| 526889 | Jan 6, 2003 | Jan 6, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 80H37500407 | 3,000 |
| 526889Amendment | Jan 6, 2003 | Jan 6, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 80H37500407 | 3,000 |
| 526876 | Jan 2, 2003 | Jan 2, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 51H37500168 | 3,000 |
| 526876Amendment | Jan 2, 2003 | Jan 2, 2003 | Pioneer Natural Res. USA, Inc. | Masterson #B 51H37500168 | 3,000 |
| 526723 | Dec 31, 2002 | Dec 31, 2002 | Pioneer Natural Res. USA, Inc. | Bivins #A218H37531493 | 3,200 |
| 526719 | Dec 31, 2002 | Dec 31, 2002 | Pioneer Natural Res. USA, Inc. | Masterson #B117H37531505 | 3,350 |
| 526021 | Dec 5, 2002 | Dec 5, 2002 | Makoil, Inc. | Indian Creek #M 1037531651 | 2,300 |
| 525924 | Dec 2, 2002 | Dec 2, 2002 | Makoil, Inc. | Indian Creek #M 537531650 | 2,300 |
| 525587 | Nov 18, 2002 | Nov 18, 2002 | Pioneer Natural Res. USA, Inc. | Masterson "20" #B 95H37530034 | 3,100 |
| 525220 | Nov 5, 2002 | Nov 5, 2002 | Pioneer Natural Res. USA, Inc. | Masterson "70" #B 61H37500299 | 3,100 |
| 524855 | Oct 22, 2002 | Oct 22, 2002 | Pioneer Natural Res. USA, Inc. | Masterson "79" #G 7H37531501 | 3,350 |
| 524097 | Sep 27, 2002 | Sep 27, 2002 | Pioneer Natural Res. USA, Inc. | Masterson "3" #A 44H37531497 | 3,040 |
| 523219 | Aug 29, 2002 | Aug 29, 2002 | Pioneer Natural Res. USA, Inc. | Bivins "33" #A153H37500199 | 3,200 |
| 523218 | Aug 29, 2002 | Aug 29, 2002 | Pioneer Natural Res. USA, Inc. | Bivins "58" #A 91H37500261 | 2,900 |
| 523215 | Aug 29, 2002 | Aug 29, 2002 | Pioneer Natural Res. USA, Inc. | Bivins "81" #A232H37531598 | 3,250 |
| 523214 | Aug 29, 2002 | Aug 29, 2002 | Pioneer Natural Res. USA, Inc. | Bivins "57" #A191H37531413 | 3,250 |
| 522824 | Aug 20, 2002 | Aug 20, 2002 | Pioneer Natural Res. USA, Inc. | Bivins "22" #A170H37530048 | 3,350 |
| 522422 | Aug 14, 2002 | Aug 14, 2002 | Pioneer Natural Res. USA, Inc. | Masterson B #126H37531543 | 3,300 |
| 522421 | Aug 14, 2002 | Aug 14, 2002 | Pioneer Natural Res. USA, Inc. | Masterson B #121H37531514 | 3,100 |
| 522527 | Aug 6, 2002 | Aug 6, 2002 | Makoil, Inc. | Indian Creek #M 137531649 | 2,300 |
| 522400 | Aug 1, 2002 | Aug 1, 2002 | Questar Expl. and Prod. Co. | Bivins Ranch #120337531615 | 6,000 |
| 522400Amendment | Aug 1, 2002 | Aug 1, 2002 | Sand River O & E LLC | Bivins Ranch #300537531615 | 2,800 |
| 522400Amendment | Aug 1, 2002 | Aug 1, 2002 | Sand River O & E LLC | Bivins Ranch #300537531615 | 2,950 |
| 522165 | Jul 24, 2002 | Jul 24, 2002 | Pioneer Natural Res. USA, Inc. | Masterson B #68H37500451 | 3,150 |
| 521885 | Jul 17, 2002 | Jul 17, 2002 | Pioneer Natural Res. USA, Inc. | Masterson "C" #4H37531509 | 3,300 |
| 521883 | Jul 17, 2002 | Jul 17, 2002 | Pioneer Natural Res. USA, Inc. | Bivins "A" #197H37531457 | 3,250 |
| 521562 | Jul 3, 2002 | Jul 3, 2002 | Pioneer Natural Res. USA, Inc. | Bivins #A217H37531491 | 3,200 |
| 521288 | Jun 24, 2002 | Jun 24, 2002 | Pioneer Natural Res. USA, Inc. | Bivins "46" #122R37531647 | 2,400 |
| 521287 | Jun 24, 2002 | Jun 24, 2002 | Pioneer Natural Res. USA, Inc. | Bivins "59" #123R37531648 | 2,400 |
| 521286 | Jun 24, 2002 | Jun 24, 2002 | Pioneer Natural Res. USA, Inc. | Bivins "45" #124R37531646 | 2,400 |
| 520812 | Jun 11, 2002 | Jun 11, 2002 | Pioneer Natural Res. USA, Inc. | Bivins #A162H37500165 | 3,400 |
| 520490 | May 31, 2002 | May 31, 2002 | Pioneer Natural Res. USA, Inc. | Bivins #A129H37500194 | 3,300 |
| 520198 | May 22, 2002 | May 22, 2002 | Pioneer Natural Res. USA, Inc. | Bivins #A159H37500111 | 3,400 |
| 519746 | May 8, 2002 | May 8, 2002 | Pioneer Natural Res. USA, Inc. | Bivins #A219H37531494 | 3,400 |
| 519300 | Apr 23, 2002 | Apr 23, 2002 | Pioneer Natural Res. USA, Inc. | Bivins #A209H37531479 | 3,400 |
| 519261 | Apr 23, 2002 | Apr 23, 2002 | Pioneer Natural Res. USA, Inc. | Bivins #A231H37531594 | 3,400 |
| 517781 | Feb 21, 2002 | Feb 21, 2002 | Sunlight Exploration, Inc. | Bush "25" #237531645 | 4,000 |
| 517561 | Feb 12, 2002 | Feb 12, 2002 | Sunlight Exploration, Inc. | O'Brien '15' #237531644 | 5,500 |
| 515511 | Nov 20, 2001 | Nov 20, 2001 | Sunlight Exploration, Inc. | O'Brien '15' #137531643 | 5,500 |
| 515073 | Nov 14, 2001 | Nov 14, 2001 | Colorado Interstate Gas Co. | Bivins #10237531642 | 400 |
| 513115 | Sep 7, 2001 | Sep 7, 2001 | Sunlight Exploration, Inc. | Bush 21 #137531638 | 4,000 |
| 513305 | Sep 6, 2001 | Sep 6, 2001 | Questar Expl. and Prod. Co. | Bivins Ranch #150337531641 | 6,000 |
| 513305Amendment | Sep 6, 2001 | Sep 6, 2001 | Questar Expl. and Prod. Co. | Bivins Ranch #150337531641 | 6,000 |
| 513195 | Sep 5, 2001 | Sep 5, 2001 | Sunlight Exploration, Inc. | Bush 25 #137531639 | 4,000 |
| 513194 | Sep 5, 2001 | Sep 5, 2001 | Sunlight Exploration, Inc. | Bivins 22 #137531640 | 4,000 |
| 513116 | Aug 31, 2001 | Aug 31, 2001 | Sunlight Exploration, Inc. | Marsh Ranch #60237531637 | 4,000 |
| 512317 | Aug 8, 2001 | Aug 8, 2001 | Pioneer Natural Res. USA, Inc. | Masterson #A 47H37531508 | 3,400 |