| 617988 | Sep 12, 2006 | Sep 12, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A248H | 3,800 | 37531718 |
| 625661 | Sep 8, 2006 | Sep 8, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A171 | 3,800 | 37530053 |
| 625268 | Aug 31, 2006 | Aug 31, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B136H | 3,800 | 37531696 |
| 625123 | Aug 29, 2006 | Aug 29, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A251 | 3,800 | 37531736 |
| 624075 | Aug 9, 2006 | Aug 9, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B 72H | 3,800 | 37500072 |
| 623076 | Jul 25, 2006 | Jul 25, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B138H | 3,400 | 37531697 |
| 622385 | Jul 11, 2006 | Jul 11, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #141R | 3,000 | 37531735 |
| 622378 | Jul 11, 2006 | Jul 11, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #140R | 3,000 | 37531734 |
| 622340 | Jul 11, 2006 | Jul 11, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #139R | 3,000 | 37531733 |
| 622333 | Jul 11, 2006 | Jul 11, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #138R | 3,000 | 37531732 |
| 622087 | Jul 7, 2006 | Jul 7, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B135H | 3,800 | 37531685 |
| 621330 | Jun 21, 2006 | Jun 21, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #135R | 3,000 | 37531731 |
| 621070 | Jun 21, 2006 | Jun 21, 2006 | Beren Corporation | Masterson Estate #64 | 2,400 | 37531730 |
| 621068 | Jun 21, 2006 | Jun 21, 2006 | Beren Corporation | Masterson Estate #67 | 2,400 | 37531729 |
| 621142 | Jun 20, 2006 | Jun 20, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B 74H | 3,800 | 37500338 |
| 620753 | Jun 15, 2006 | Jun 15, 2006 | Sofamco, Inc. | Bush #1 | 4,500 | 37531728 |
| 620749 | Jun 15, 2006 | Jun 15, 2006 | Sofamco, Inc. | Price #1 | 4,500 | 37531727 |
| 620739 | Jun 15, 2006 | Jun 15, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B143 | 3,800 | 37531726 |
| 620739Amendment | Jun 15, 2006 | Jun 15, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B143 | 3,800 | 37531726 |
| 620738 | Jun 15, 2006 | Jun 15, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B142 | 3,800 | 37531725 |
| 620738Amendment | Jun 15, 2006 | Jun 15, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B142 | 3,800 | 37531725 |
| 620623 | Jun 8, 2006 | Jun 8, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B134H | 3,500 | 37531684 |
| 620402 | Jun 5, 2006 | Jun 5, 2006 | Pioneer Natural Res. USA, Inc. | Masterson #B140H | 3,500 | 37531712 |
| 619072 | May 11, 2006 | May 11, 2006 | Burk Royalty Co., Ltd. | Bush-Emeny #1 | 7,000 | 37531724 |
| 616405 | Mar 24, 2006 | Mar 24, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A247H | 3,800 | 37531713 |
| 616405Amendment | Mar 24, 2006 | Mar 24, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A247H | 3,800 | 37531713 |
| 615763 | Mar 16, 2006 | Mar 16, 2006 | Leejan Oil Company | Crawford #7078 | 2,500 | 37531722 |
| 615552Amendment | Mar 16, 2006 | Mar 16, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #29HH | 3,250 | 37531723 |
| 615551 | Mar 16, 2006 | Mar 16, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #28HH | 3,250 | 37531721 |
| 615176 | Mar 3, 2006 | Mar 3, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A 89H | 3,800 | 37500148 |
| 615176Amendment | Mar 3, 2006 | Mar 3, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A 89H | 3,800 | 37500148 |
| 613277 | Feb 6, 2006 | Feb 6, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #27HH | 3,250 | 37531719 |
| 613277Amendment | Feb 6, 2006 | Feb 6, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #27HH | 3,250 | 37531719 |
| 613277Amendment | Feb 6, 2006 | Feb 6, 2006 | Linn Operating, Inc. | Bivins D #27HH | 3,250 | 37531719 |
| 612194 | Jan 17, 2006 | Jan 17, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #26HH | 3,150 | 37531716 |
| 612191 | Jan 17, 2006 | Jan 17, 2006 | Pogo Panhandle 2004, L.P. | Bivins D #25HH | 3,200 | 37531717 |
| 612383 | Jan 13, 2006 | Jan 13, 2006 | Pioneer Natural Res. USA, Inc. | Bivins #A248 | 3,800 | 37531718 |
| 611576 | Dec 27, 2005 | Dec 27, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #A 26H | 3,800 | 37500314 |
| 610070 | Nov 29, 2005 | Nov 29, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B141 | 3,800 | 37531715 |
| 608615 | Nov 2, 2005 | Nov 2, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B139 | 3,800 | 37531714 |
| 607088 | Sep 29, 2005 | Sep 29, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #A 29H | 3,800 | 37500109 |
| 605478 | Aug 26, 2005 | Aug 26, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A247 | 3,800 | 37531713 |
| 605478Amendment | Aug 26, 2005 | Aug 26, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A247 | 3,800 | 37531713 |
| 605468 | Aug 26, 2005 | Aug 26, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B140 | 3,800 | 37531712 |
| 604698 | Aug 11, 2005 | Aug 11, 2005 | Pogo Panhandle 2004, L.P. | Bivins Fee #13H | 3,050 | 37531710 |
| 604691 | Aug 11, 2005 | Aug 11, 2005 | Pogo Panhandle 2004, L.P. | Bivins Fee #12H | 3,050 | 37531711 |
| 604690 | Aug 11, 2005 | Aug 11, 2005 | Pogo Panhandle 2004, L.P. | Bivins Fee #11H | 3,050 | 37531709 |
| 604289 | Aug 4, 2005 | Aug 4, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A 53H | 3,100 | 37500380 |
| 604286 | Aug 4, 2005 | Aug 4, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A166H | 3,000 | 37500376 |
| 602034 | Jun 14, 2005 | Jun 14, 2005 | Pantera Energy Company | Bivins, L.T. #1A | 3,250 | 37531708 |
| 602034Amendment | Jun 14, 2005 | Jun 14, 2005 | Pantera Energy Company | Bivins, L.T. #1A | 3,250 | 37531708 |
| 601588 | Jun 7, 2005 | Jun 7, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A 49H | 3,200 | 37500372 |
| 601586 | Jun 7, 2005 | Jun 7, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A 46H | 3,650 | 37500099 |
| 600967 | May 31, 2005 | May 31, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #3 | 400 | 37531707 |
| 600966 | May 31, 2005 | May 31, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #2 | 400 | 37531706 |
| 600302 | May 9, 2005 | May 9, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A136H | 3,800 | 37500147 |
| 542405 | Apr 30, 2005 | Apr 30, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #15 | 1,880 | 37500360 |
| 542388 | Apr 30, 2005 | Apr 30, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #7 | 2,000 | 37500282 |
| 528978Amendment | Apr 6, 2005 | Apr 6, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B 11H | 3,650 | 37500258 |
| 559676 | Mar 30, 2005 | Mar 30, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A 42H | 3,800 | 37500340 |
| 559675 | Mar 30, 2005 | Mar 30, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B 37H | 3,800 | 37500286 |
| 558206Amendment | Mar 30, 2005 | Mar 30, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A240H | 3,800 | 37531694 |
| 558206 | Feb 28, 2005 | Feb 28, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A240H | 3,800 | 37531694 |
| 557809 | Feb 18, 2005 | Feb 18, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A239H | 3,800 | 37531692 |
| 557717 | Feb 16, 2005 | Feb 16, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A195H | 3,800 | 37531431 |
| 555779 | Jan 11, 2005 | Jan 11, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A238H | 3,800 | 37531691 |
| 555942 | Jan 10, 2005 | Jan 10, 2005 | Stallion Energy, Inc. | Bivins D #23 HH | 3,350 | 37531705 |
| 555697 | Jan 10, 2005 | Jan 10, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A244H | 3,800 | 37531693 |
| 555694 | Jan 10, 2005 | Jan 10, 2005 | Pioneer Natural Res. USA, Inc. | Bivins #A246H | 3,800 | 37531700 |
| 555689 | Jan 7, 2005 | Jan 7, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B 13H | 3,300 | 37500262 |
| 555689Amendment | Jan 7, 2005 | Jan 7, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B 13H | 3,300 | 37500262 |
| 555682 | Jan 7, 2005 | Jan 7, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #A 9H | 3,200 | 37500217 |
| 555119 | Jan 4, 2005 | Jan 4, 2005 | Pioneer Natural Res. USA, Inc. | Masterson #B 73H | 3,650 | 37500227 |
| 551432 | Oct 22, 2004 | Oct 22, 2004 | Stallion Energy, Inc. | Bivins D (035000) #2 | 3,333 | 37500257 |
| 551862 | Oct 6, 2004 | Oct 6, 2004 | Stallion Energy, Inc. | Bivins D #1HH | 3,100 | 37531675 |
| 551243 | Sep 22, 2004 | Sep 22, 2004 | Stallion Energy, Inc. | Bivins D #22HH | 3,400 | 37531704 |
| 550749 | Sep 13, 2004 | Sep 13, 2004 | Pioneer Natural Res. USA, Inc. | Masterson #1 | 350 | 37531703 |
| 550212 | Aug 27, 2004 | Aug 27, 2004 | Makoil, Inc. | Indian Creek(rrc #07436) #258 | 2,300 | 37531701 |
| 550211 | Aug 27, 2004 | Aug 27, 2004 | Makoil, Inc. | Indian Creek (RRC #07436) #259 | 2,300 | 37531702 |
| 549718 | Aug 20, 2004 | Aug 20, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A237H | 3,800 | 37531689 |
| 549715 | Aug 20, 2004 | Aug 20, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A236H | 3,800 | 37531690 |
| 548537 | Jul 27, 2004 | Jul 27, 2004 | Pioneer Natural Res. USA, Inc. | Masterson #178 | 350 | 37531698 |
| 548539 | Jul 23, 2004 | Jul 23, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A246 | 3,500 | 37531700 |
| 548308 | Jul 19, 2004 | Jul 19, 2004 | Stallion Energy, Inc. | Bivins #D 7H | 3,050 | 37500267 |
| 548308Amendment | Jul 19, 2004 | Jul 19, 2004 | Stallion Energy, Inc. | Bivins D #7H | 3,050 | 37500267 |
| 548307 | Jul 19, 2004 | Jul 19, 2004 | Stallion Energy, Inc. | Bivins #D 4H | 12,467 | 37500266 |
| 547971 | Jul 16, 2004 | Jul 16, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A199H | 3,500 | 37531456 |
| 547883 | Jul 14, 2004 | Jul 14, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A 50H | 3,500 | 37500180 |
| 547935 | Jul 12, 2004 | Jul 12, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A106H | 3,500 | 37500185 |
| 547929 | Jul 12, 2004 | Jul 12, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A184H | 3,500 | 37531396 |
| 547911 | Jul 12, 2004 | Jul 12, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A115H | 3,500 | 37500097 |
| 547939 | Jul 9, 2004 | Jul 9, 2004 | Pioneer Natural Res. USA, Inc. | Masterson #A 13H | 3,500 | 37500303 |
| 547900 | Jul 9, 2004 | Jul 9, 2004 | Pioneer Natural Res. USA, Inc. | Masterson #B116H | 3,500 | 37531506 |
| 547900Amendment | Jul 9, 2004 | Jul 9, 2004 | Pioneer Natural Res. USA, Inc. | Masterson #B116H | 3,500 | 37531506 |
| 547589 | Jul 6, 2004 | Jul 6, 2004 | Luxor Oil & Gas, Inc. | McBride A #2 | 2,250 | 37500345 |
| 547589Amendment | Jul 6, 2004 | Jul 6, 2004 | Luxor Oil & Gas, Inc. | McBride A #2H | 2,764 | 37500345 |
| 546040 | May 26, 2004 | May 26, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A109H | 3,800 | 37500298 |
| 546040Amendment | May 26, 2004 | May 26, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A109H | 3,800 | 37500298 |
| 546033 | May 26, 2004 | May 26, 2004 | Pioneer Natural Res. USA, Inc. | Bivins #A 83H | 3,800 | 37500399 |
| 545135 | May 3, 2004 | May 3, 2004 | Pioneer Natural Res. USA, Inc. | Crawford #B 4H | 3,800 | 37531428 |