| 728158 | Nov 21, 2011 | Nov 21, 2011 | Encana Oil & Gas(usa) Inc. | Bsi/Usfs Unit F16 #2HH | 15,500 | 40530482 |
| 728056 | Nov 21, 2011 | Nov 21, 2011 | XTO Energy Inc. | Scorpions (SL) Du #1HBH | 18,000 | 40530481 |
| 728011 | Nov 14, 2011 | Nov 14, 2011 | EOG Resources, Inc. | Matthews Unit #1HH | 14,000 | 40530480 |
| 728011Amendment | Nov 14, 2011 | Nov 14, 2011 | EOG Resources, Inc. | Lout Unit #1HRH | 14,100 | 40530480 |
| 727958 | Nov 14, 2011 | Nov 14, 2011 | Devon Energy Production Co, L.P. | Halbert Trust Gas Unit #2HH | 14,500 | 40530479 |
| 727958Amendment | Nov 14, 2011 | Nov 14, 2011 | Devon Energy Production Co, L.P. | Halbert Trust Gas Unit #2HH | 15,500 | 40530479 |
| 726899 | Oct 27, 2011 | Oct 27, 2011 | EOG Resources, Inc. | Lister Unit #1HH | 14,020 | 40530478 |
| 726899Amendment | Oct 27, 2011 | Oct 27, 2011 | EOG Resources, Inc. | Lister Unit #1HH | 14,020 | 40530478 |
| 726717 | Oct 27, 2011 | Oct 27, 2011 | Encana Oil & Gas(usa) Inc. | Bsi/Usfs Unit F1 #2HH | 15,500 | 40530476 |
| 726712 | Oct 27, 2011 | Oct 27, 2011 | Encana Oil & Gas(usa) Inc. | Bsi/Usfs Unit F1 #1HH | 15,500 | 40530475 |
| 726222 | Oct 19, 2011 | Oct 19, 2011 | Encana Oil & Gas(usa) Inc. | Bsi/Usfs Unit F6 #3HH | 15,500 | 40530474 |
| 726218 | Oct 19, 2011 | Oct 19, 2011 | Encana Oil & Gas(usa) Inc. | Bsi/Usfs Unit F6 #2HH | 15,500 | 40530473 |
| 726215 | Oct 19, 2011 | Oct 19, 2011 | Encana Oil & Gas(usa) Inc. | Bsi/Usfs Unit F6 #1HH | 15,500 | 40530472 |
| 725600 | Oct 13, 2011 | Oct 13, 2011 | XTO Energy Inc. | Butler Rooney (SL) Gas Unit #1HBH | 18,800 | 40530471 |
| 725978 | Oct 11, 2011 | Oct 11, 2011 | Devon Energy Production Co, L.P. | Kardell, S GU #2HH | 14,500 | 40530470 |
| 725463 | Oct 10, 2011 | Oct 10, 2011 | XTO Energy Inc. | Blue Raiders (SL) Du #1HBH | 19,300 | 40530469 |
| 725159 | Sep 29, 2011 | Sep 29, 2011 | XTO Energy Inc. | Wildcats SWD #1 | 8,000 | 40530468 |
| 724284 | Sep 16, 2011 | Sep 16, 2011 | Chesapeake Operating, Inc. | Sterling GU Sag #1HH | 15,000 | 40530467 |
| 724284Amendment | Sep 16, 2011 | Sep 16, 2011 | Chesapeake Operating, Inc. | Sterling GU Sag #1HH | 15,000 | 40530467 |
| 722826 | Aug 26, 2011 | Aug 26, 2011 | XTO Energy Inc. | Aggies (SL) Du #1HBH | 19,100 | 40530466 |
| 722826Amendment | Aug 26, 2011 | Aug 26, 2011 | XTO Energy Inc. | Aggies (SL) Du #1HBH | 19,100 | 40530466 |
| 722281 | Aug 25, 2011 | Aug 25, 2011 | Exco Operating Company, LP | Dennis SU #1HRH | 15,000 | 40530465 |
| 722281Amendment | Aug 25, 2011 | Aug 25, 2011 | Exco Operating Company, LP | Dennis SU #1HRH | 15,000 | 40530465 |
| 718725 | Aug 15, 2011 | Aug 15, 2011 | Exco Operating Company, LP | York SU #2HBH | 15,000 | 40530457 |
| 718725Amendment | Aug 15, 2011 | Aug 15, 2011 | Exco Operating Company, LP | York SU #2HBH | 15,000 | 40530457 |
| 721631 | Aug 8, 2011 | Aug 8, 2011 | SM Energy Company | Cook #1HH | 13,600 | 40530464 |
| 721631Amendment | Aug 8, 2011 | Aug 8, 2011 | Aethon Energy Operating LLC | Cook #1HH | 13,413 | 40530464 |
| 721192 | Aug 3, 2011 | Aug 3, 2011 | Exco Operating Company, LP | Brown SU #1HH | 15,000 | 40530463 |
| 721192Amendment | Aug 3, 2011 | Aug 3, 2011 | Exco Operating Company, LP | Brown-Weeks SU (Alloc) #1HH | 15,000 | 40530463 |
| 720636 | Jul 29, 2011 | Jul 29, 2011 | Exco Operating Company, LP | Dennis SU #1HH | 15,000 | 40530462 |
| 720636Amendment | Jul 29, 2011 | Jul 29, 2011 | Exco Operating Company, LP | Dennis SU #1HH | 15,000 | 40530462 |
| 719756 | Jul 8, 2011 | Jul 8, 2011 | Chesapeake Operating, Inc. | Harris GU Sag #1HH | 16,000 | 40530461 |
| 719484 | Jul 8, 2011 | Jul 8, 2011 | Exco Operating Company, LP | Stansbury SU #1HH | 15,000 | 40530460 |
| 719484Amendment | Jul 8, 2011 | Jul 8, 2011 | Exco Operating Company, LP | Stansbury SU #1HH | 15,000 | 40530460 |
| 719027 | Jun 27, 2011 | Jun 27, 2011 | BP America Production Company | Red River Gas Unit B #1HH | 17,500 | 40530459 |
| 718973 | Jun 24, 2011 | Jun 24, 2011 | SM Energy Company | Polo #1HH | 13,500 | 40530458 |
| 718728 | Jun 22, 2011 | Jun 22, 2011 | Encana Oil & Gas(usa) Inc. | BSM Unit A19 #1HH | 15,500 | 40530456 |
| 718728Amendment | Jun 22, 2011 | Jun 22, 2011 | Encana Oil & Gas(usa) Inc. | BSM Unit A19 #1HH | 15,500 | 40530456 |
| 718371 | Jun 21, 2011 | Jun 21, 2011 | Exco Operating Company, LP | Red River 575 SU #1HBH | 15,000 | 40530455 |
| 717778 | Jun 13, 2011 | Jun 13, 2011 | High Roller Wells, L.L.C. | Highroller SWD #5 | 7,700 | 40530454 |
| 713777 | Jun 7, 2011 | Jun 7, 2011 | Exco Operating Company, LP | Watson SU #1HH | 15,000 | 40530438 |
| 714635 | Jun 6, 2011 | Jun 6, 2011 | Exco Operating Company, LP | Thomas SU #1 HH | 15,000 | 40530444 |
| 714635Amendment | Jun 6, 2011 | Jun 6, 2011 | Exco Operating Company, LP | Thomas SU #1 HH | 15,000 | 40530444 |
| 714635Amendment | Jun 6, 2011 | Jun 6, 2011 | Exco Operating Company, LP | Thomas SU #1 HH | 15,000 | 40530444 |
| 713658 | Jun 6, 2011 | Jun 6, 2011 | Exco Operating Company, LP | Fitzallen SU #1HH | 15,000 | 40530437 |
| 713658Amendment | Jun 6, 2011 | Jun 6, 2011 | Exco Operating Company, LP | Fitzallen SU #1HH | 15,000 | 40530437 |
| 717042 | May 25, 2011 | May 25, 2011 | SM Energy Company | Marco #1HH | 14,000 | 40530453 |
| 717042Amendment | May 25, 2011 | May 25, 2011 | SM Energy Company | Marco #1HH | 13,495 | 40530453 |
| 716824 | May 23, 2011 | May 23, 2011 | Encana Oil & Gas(usa) Inc. | BSM Unit A20 #1HH | 15,000 | 40530452 |
| 716800 | May 20, 2011 | May 20, 2011 | Chesapeake Operating, Inc. | Wright GU Sag #1HH | 18,000 | 40530451 |
| 716800Amendment | May 20, 2011 | May 20, 2011 | Chesapeake Operating, Inc. | Wright GU Sag #1HH | 18,000 | 40530451 |
| 716249 | May 19, 2011 | May 19, 2011 | Exco Operating Company, LP | Hopkins SU #1HH | 15,000 | 40530450 |
| 716050 | May 18, 2011 | May 18, 2011 | XTO Energy Inc. | Thundering Herd (SL) Du #1HBH | 19,000 | 40530449 |
| 715571 | May 12, 2011 | May 12, 2011 | XTO Energy Inc. | Black Knights Du #2HH | 21,000 | 40530448 |
| 715528 | May 11, 2011 | May 11, 2011 | Exco Operating Company, LP | Platt SU #1HH | 15,000 | 40530447 |
| 715528Amendment | May 11, 2011 | May 11, 2011 | Exco Operating Company, LP | Platt SU #1HH | 15,000 | 40530447 |
| 715661 | May 9, 2011 | May 9, 2011 | SM Energy Company | Marquette #1HH | 13,500 | 40530446 |
| 715661Amendment | May 9, 2011 | May 9, 2011 | SM Energy Company | Marquette #1HH | 13,488 | 40530446 |
| 715056 | May 3, 2011 | May 3, 2011 | Encana Oil & Gas(usa) Inc. | Bsi Unit A47 #2HH | 15,500 | 40530445 |
| 715056Amendment | May 3, 2011 | May 3, 2011 | Encana Oil & Gas(usa) Inc. | Bsi Unit A47 #2HH | 15,500 | 40530445 |
| 714190 | Apr 27, 2011 | Apr 27, 2011 | Exco Operating Company, LP | Fitzgerald SU #1HH | 15,000 | 40530443 |
| 714348 | Apr 25, 2011 | Apr 25, 2011 | Southwestern Energy Prod. Co. | Howard GU 1 #1HH | 7,560 | 40530440 |
| 714418 | Apr 21, 2011 | Apr 21, 2011 | Exco Operating Company, LP | Park SU #1 HH | 15,000 | 40530442 |
| 714274 | Apr 21, 2011 | Apr 21, 2011 | Exco Operating Company, LP | Silas SU #1HH | 15,000 | 40530441 |
| 714274Amendment | Apr 21, 2011 | Apr 21, 2011 | Exco Operating Company, LP | Silas SU #1HH | 15,000 | 40530441 |
| 713890 | Apr 19, 2011 | Apr 19, 2011 | XTO Energy Inc. | Aggies Du #1HH | 19,500 | 40530439 |
| 713890Amendment | Apr 19, 2011 | Apr 19, 2011 | XTO Energy Inc. | Aggies Du #1HH | 19,500 | 40530439 |
| 713890Amendment | Apr 19, 2011 | Apr 19, 2011 | XTO Energy Inc. | Aggies Du #1HH | 19,500 | 40530439 |
| 713890Amendment | Apr 19, 2011 | Apr 19, 2011 | XTO Energy Inc. | Aggies (SL) Du #1HH | 19,500 | 40530439 |
| 713890Amendment | Apr 19, 2011 | Apr 19, 2011 | XTO Energy Inc. | Aggies (SL) Du #1HH | 19,500 | 40530439 |
| 714068 | Apr 15, 2011 | Apr 15, 2011 | EOG Resources, Inc. | Zap Minerals Unit #1HH | 14,500 | 40530436 |
| 714068Amendment | Apr 15, 2011 | Apr 15, 2011 | EOG Resources, Inc. | Zap Minerals Unit #1HH | 14,500 | 40530436 |
| 713762 | Apr 12, 2011 | Apr 12, 2011 | Chesapeake Operating, Inc. | Hatch GU Sag #1HH | 14,000 | 40530435 |
| 713607 | Apr 11, 2011 | Apr 11, 2011 | BP America Production Company | Red River Gas Unit 'A' #1HH | 17,300 | 40530434 |
| 712861 | Apr 5, 2011 | Apr 5, 2011 | Exco Operating Company, LP | Stedham SU #2 HH | 15,000 | 40530433 |
| 712670 | Mar 31, 2011 | Mar 31, 2011 | XTO Energy Inc. | Thundering Herd Du #1HH | 19,000 | 40530432 |
| 712670Amendment | Mar 31, 2011 | Mar 31, 2011 | XTO Energy Inc. | Thundering Herd (SL) Du #1HH | 19,000 | 40530432 |
| 712726 | Mar 28, 2011 | Mar 28, 2011 | SM Energy Company | Byrd #1HH | 14,000 | 40530431 |
| 712726Amendment | Mar 28, 2011 | Mar 28, 2011 | SM Energy Company | Byrd #1HH | 13,537 | 40530431 |
| 712462 | Mar 28, 2011 | Mar 28, 2011 | XTO Energy Inc. | Sooners Du #1HH | 19,000 | 40530429 |
| 712462Amendment | Mar 28, 2011 | Mar 28, 2011 | XTO Energy Inc. | Sooners Du #1HH | 19,000 | 40530429 |
| 712684 | Mar 25, 2011 | Mar 25, 2011 | EOG Resources, Inc. | Teal Unit #1HH | 14,500 | 40530430 |
| 712684Amendment | Mar 25, 2011 | Mar 25, 2011 | EOG Resources, Inc. | Teal Unit #1HH | 14,500 | 40530430 |
| 712314 | Mar 22, 2011 | Mar 22, 2011 | SM Energy Company | Coronado #1HH | 14,000 | 40530428 |
| 712314Amendment | Mar 22, 2011 | Mar 22, 2011 | SM Energy Company | Coronado #1HH | 14,000 | 40530428 |
| 712314Amendment | Mar 22, 2011 | Mar 22, 2011 | SM Energy Company | Coronado #1HH | 13,289 | 40530428 |
| 712016 | Mar 21, 2011 | Mar 21, 2011 | Exco Operating Company, LP | York SU #1 HH | 15,000 | 40530427 |
| 711754 | Mar 11, 2011 | Mar 11, 2011 | Devon Energy Production Co, L.P. | Skillern, K GU #1 | 12,602 | 40530304 |
| 711754Amendment | Mar 11, 2011 | Mar 11, 2011 | Devon Energy Production Co, L.P. | Skillern, K GU #1 | 12,602 | 40530304 |
| 711372 | Mar 7, 2011 | Mar 7, 2011 | EOG Resources, Inc. | Victoria Anne Unit #1HH | 14,000 | 40530426 |
| 711372Amendment | Mar 7, 2011 | Mar 7, 2011 | EOG Resources, Inc. | Victoria Anne Unit #1HH | 14,000 | 40530426 |
| 710825 | Mar 3, 2011 | Mar 3, 2011 | Encana Oil & Gas(usa) Inc. | Bsi/Usfs Unit F10 #1HH | 15,500 | 40530425 |
| 710823 | Mar 3, 2011 | Mar 3, 2011 | Encana Oil & Gas(usa) Inc. | Bsi/Usfs Unit F9 #1HH | 15,500 | 40530424 |
| 710820 | Mar 3, 2011 | Mar 3, 2011 | Encana Oil & Gas(usa) Inc. | Bsi/Usfs Unit F11 #1HH | 15,500 | 40530423 |
| 711089 | Mar 2, 2011 | Mar 2, 2011 | EOG Resources, Inc. | Briggs Unit #1HH | 14,000 | 40530422 |
| 711089Amendment | Mar 2, 2011 | Mar 2, 2011 | EOG Resources, Inc. | Briggs Unit #1HH | 14,000 | 40530422 |
| 707356 | Feb 24, 2011 | Feb 24, 2011 | Exco Operating Company, LP | Ward SU #1HH | 15,000 | 40530404 |
| 710258 | Feb 23, 2011 | Feb 23, 2011 | Exco Operating Company, LP | Weeks SU #1HH | 15,000 | 40530421 |
| 710258Amendment | Feb 23, 2011 | Feb 23, 2011 | Exco Operating Company, LP | Weeks SU #1HH | 15,000 | 40530421 |
| 710569 | Feb 22, 2011 | Feb 22, 2011 | SM Energy Company | Lasalle #1HH | 14,000 | 40530420 |