| 617988 | Sep 12, 2006 | Sep 12, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A248H37531718 | 3,800 |
| 625661 | Sep 8, 2006 | Sep 8, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A17137530053 | 3,800 |
| 625268 | Aug 31, 2006 | Aug 31, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B136H37531696 | 3,800 |
| 625123 | Aug 29, 2006 | Aug 29, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A25137531736 | 3,800 |
| 624075 | Aug 9, 2006 | Aug 9, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B 72H37500072 | 3,800 |
| 623076 | Jul 25, 2006 | Jul 25, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B138H37531697 | 3,400 |
| 622385 | Jul 11, 2006 | Jul 11, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #141R37531735 | 3,000 |
| 622378 | Jul 11, 2006 | Jul 11, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #140R37531734 | 3,000 |
| 622340 | Jul 11, 2006 | Jul 11, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #139R37531733 | 3,000 |
| 622333 | Jul 11, 2006 | Jul 11, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #138R37531732 | 3,000 |
| 622087 | Jul 7, 2006 | Jul 7, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B135H37531685 | 3,800 |
| 621330 | Jun 21, 2006 | Jun 21, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #135R37531731 | 3,000 |
| 621070 | Jun 21, 2006 | Jun 21, 2006 | Beren Corporation | Masterson Estate #6437531730 | 2,400 |
| 621068 | Jun 21, 2006 | Jun 21, 2006 | Beren Corporation | Masterson Estate #6737531729 | 2,400 |
| 621142 | Jun 20, 2006 | Jun 20, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B 74H37500338 | 3,800 |
| 620753 | Jun 15, 2006 | Jun 15, 2006 | Sofamco, Inc. | Bush #137531728 | 4,500 |
| 620749 | Jun 15, 2006 | Jun 15, 2006 | Sofamco, Inc. | Price #137531727 | 4,500 |
| 620739 | Jun 15, 2006 | Jun 15, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B14337531726 | 3,800 |
| 620739Amendment | Jun 15, 2006 | Jun 15, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B14337531726 | 3,800 |
| 620738 | Jun 15, 2006 | Jun 15, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B14237531725 | 3,800 |
| 620738Amendment | Jun 15, 2006 | Jun 15, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B14237531725 | 3,800 |
| 620623 | Jun 8, 2006 | Jun 8, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B134H37531684 | 3,500 |
| 620402 | Jun 5, 2006 | Jun 5, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B140H37531712 | 3,500 |
| 619072 | May 11, 2006 | May 11, 2006 | Burk Royalty Co., Ltd. | Bush-Emeny #137531724 | 7,000 |
| 616405 | Mar 24, 2006 | Mar 24, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A247H37531713 | 3,800 |
| 616405Amendment | Mar 24, 2006 | Mar 24, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A247H37531713 | 3,800 |
| 615763 | Mar 16, 2006 | Mar 16, 2006 | Leejan Oil Company | Crawford #707837531722 | 2,500 |
| 615552Amendment | Mar 16, 2006 | Mar 16, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #29HH37531723 | 3,250 |
| 615551 | Mar 16, 2006 | Mar 16, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #28HH37531721 | 3,250 |
| 615176 | Mar 3, 2006 | Mar 3, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A 89H37500148 | 3,800 |
| 615176Amendment | Mar 3, 2006 | Mar 3, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A 89H37500148 | 3,800 |
| 613277 | Feb 6, 2006 | Feb 6, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #27HH37531719 | 3,250 |
| 613277Amendment | Feb 6, 2006 | Feb 6, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #27HH37531719 | 3,250 |
| 613277Amendment | Feb 6, 2006 | Feb 6, 2006 | Linn Operating, Inc. | Bivins D #27HH37531719 | 3,250 |
| 612194 | Jan 17, 2006 | Jan 17, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #26HH37531716 | 3,150 |
| 612191 | Jan 17, 2006 | Jan 17, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #25HH37531717 | 3,200 |
| 612383 | Jan 13, 2006 | Jan 13, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A24837531718 | 3,800 |
| 611576 | Dec 27, 2005 | Dec 27, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #A 26H37500314 | 3,800 |
| 610070 | Nov 29, 2005 | Nov 29, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B14137531715 | 3,800 |
| 608615 | Nov 2, 2005 | Nov 2, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B13937531714 | 3,800 |
| 607088 | Sep 29, 2005 | Sep 29, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #A 29H37500109 | 3,800 |
| 605478 | Aug 26, 2005 | Aug 26, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A24737531713 | 3,800 |
| 605478Amendment | Aug 26, 2005 | Aug 26, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A24737531713 | 3,800 |
| 605468 | Aug 26, 2005 | Aug 26, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B14037531712 | 3,800 |
| 604698 | Aug 11, 2005 | Aug 11, 2005 | Pogo Panhandle 2004, L.P. | Bivins Fee #13H37531710 | 3,050 |
| 604691 | Aug 11, 2005 | Aug 11, 2005 | Pogo Panhandle 2004, L.P. | Bivins Fee #12H37531711 | 3,050 |
| 604690 | Aug 11, 2005 | Aug 11, 2005 | Pogo Panhandle 2004, L.P. | Bivins Fee #11H37531709 | 3,050 |
| 604289 | Aug 4, 2005 | Aug 4, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A 53H37500380 | 3,100 |
| 604286 | Aug 4, 2005 | Aug 4, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A166H37500376 | 3,000 |
| 602034 | Jun 14, 2005 | Jun 14, 2005 | Pantera Energy Company | Bivins, L.T. #1A37531708 | 3,250 |
| 602034Amendment | Jun 14, 2005 | Jun 14, 2005 | Pantera Energy Company | Bivins, L.T. #1A37531708 | 3,250 |
| 601588 | Jun 7, 2005 | Jun 7, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A 49H37500372 | 3,200 |
| 601586 | Jun 7, 2005 | Jun 7, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A 46H37500099 | 3,650 |
| 600967 | May 31, 2005 | May 31, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #337531707 | 400 |
| 600966 | May 31, 2005 | May 31, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #237531706 | 400 |
| 600302 | May 9, 2005 | May 9, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A136H37500147 | 3,800 |
| 542405 | Apr 30, 2005 | Apr 30, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #1537500360 | 1,880 |
| 542388 | Apr 30, 2005 | Apr 30, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #737500282 | 2,000 |
| 528978Amendment | Apr 6, 2005 | Apr 6, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B 11H37500258 | 3,650 |
| 559676 | Mar 30, 2005 | Mar 30, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A 42H37500340 | 3,800 |
| 559675 | Mar 30, 2005 | Mar 30, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B 37H37500286 | 3,800 |
| 558206Amendment | Mar 30, 2005 | Mar 30, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A240H37531694 | 3,800 |
| 558206 | Feb 28, 2005 | Feb 28, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A240H37531694 | 3,800 |
| 557809 | Feb 18, 2005 | Feb 18, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A239H37531692 | 3,800 |
| 557717 | Feb 16, 2005 | Feb 16, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A195H37531431 | 3,800 |
| 555779 | Jan 11, 2005 | Jan 11, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A238H37531691 | 3,800 |
| 555942 | Jan 10, 2005 | Jan 10, 2005 | Stallion Energy, Inc. | Bivins D #23 HH37531705 | 3,350 |
| 555697 | Jan 10, 2005 | Jan 10, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A244H37531693 | 3,800 |
| 555694 | Jan 10, 2005 | Jan 10, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A246H37531700 | 3,800 |
| 555689 | Jan 7, 2005 | Jan 7, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B 13H37500262 | 3,300 |
| 555689Amendment | Jan 7, 2005 | Jan 7, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B 13H37500262 | 3,300 |
| 555682 | Jan 7, 2005 | Jan 7, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #A 9H37500217 | 3,200 |
| 555119 | Jan 4, 2005 | Jan 4, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B 73H37500227 | 3,650 |
| 551432 | Oct 22, 2004 | Oct 22, 2004 | Stallion Energy, Inc. | Bivins D (035000) #237500257 | 3,333 |
| 551862 | Oct 6, 2004 | Oct 6, 2004 | Stallion Energy, Inc. | Bivins D #1HH37531675 | 3,100 |
| 551243 | Sep 22, 2004 | Sep 22, 2004 | Stallion Energy, Inc. | Bivins D #22HH37531704 | 3,400 |
| 550749 | Sep 13, 2004 | Sep 13, 2004 | Pioneer Natural Res. USA, Inc. | Masterson #137531703 | 350 |
| 550212 | Aug 27, 2004 | Aug 27, 2004 | Makoil, Inc. | Indian Creek(rrc #07436) #25837531701 | 2,300 |
| 550211 | Aug 27, 2004 | Aug 27, 2004 | Makoil, Inc. | Indian Creek (RRC #07436) #25937531702 | 2,300 |
| 549718 | Aug 20, 2004 | Aug 20, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A237H37531689 | 3,800 |
| 549715 | Aug 20, 2004 | Aug 20, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A236H37531690 | 3,800 |
| 548537 | Jul 27, 2004 | Jul 27, 2004 | Pioneer Natural Res. USA, Inc. | Masterson #17837531698 | 350 |
| 548539 | Jul 23, 2004 | Jul 23, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A24637531700 | 3,500 |
| 548308 | Jul 19, 2004 | Jul 19, 2004 | Stallion Energy, Inc. | Bivins #D 7H37500267 | 3,050 |
| 548308Amendment | Jul 19, 2004 | Jul 19, 2004 | Stallion Energy, Inc. | Bivins D #7H37500267 | 3,050 |
| 548307 | Jul 19, 2004 | Jul 19, 2004 | Stallion Energy, Inc. | Bivins #D 4H37500266 | 12,467 |
| 547971 | Jul 16, 2004 | Jul 16, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A199H37531456 | 3,500 |
| 547883 | Jul 14, 2004 | Jul 14, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A 50H37500180 | 3,500 |
| 547935 | Jul 12, 2004 | Jul 12, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A106H37500185 | 3,500 |
| 547929 | Jul 12, 2004 | Jul 12, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A184H37531396 | 3,500 |
| 547911 | Jul 12, 2004 | Jul 12, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A115H37500097 | 3,500 |
| 547939 | Jul 9, 2004 | Jul 9, 2004 | Pioneer Natural Res. USA, Inc. | Masterson #A 13H37500303 | 3,500 |
| 547900 | Jul 9, 2004 | Jul 9, 2004 | Pioneer Natural Res. USA, Inc. | Masterson #B116H37531506 | 3,500 |
| 547900Amendment | Jul 9, 2004 | Jul 9, 2004 | Pioneer Natural Res. USA, Inc. | Masterson #B116H37531506 | 3,500 |
| 547589 | Jul 6, 2004 | Jul 6, 2004 | Luxor Oil & Gas, Inc. | McBride A #237500345 | 2,250 |
| 547589Amendment | Jul 6, 2004 | Jul 6, 2004 | Luxor Oil & Gas, Inc. | McBride A #2H37500345 | 2,764 |
| 546040 | May 26, 2004 | May 26, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A109H37500298 | 3,800 |
| 546040Amendment | May 26, 2004 | May 26, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A109H37500298 | 3,800 |
| 546033 | May 26, 2004 | May 26, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A 83H37500399 | 3,800 |
| 545135 | May 3, 2004 | May 3, 2004 | Pioneer Natural Res. USA, Inc. | Crawford #B 4H37531428 | 3,800 |