| 721460 | Aug 8, 2011 | Aug 8, 2011 | Cox & Perkins Exploration, Inc. | Wharton | Bender Gas Unit #1 | 10,950 | 48135210 |
| 695682 | May 13, 2010 | May 13, 2010 | Cox & Perkins Exploration, Inc. | Jackson | Ganado Farms #1 | 5,315 | 23933218 |
| 695137 | Apr 28, 2010 | Apr 28, 2010 | Cox & Perkins Exploration, Inc. | Wharton | Clarine Gold Unit #2 | 9,250 | 48135140 |
| 693338 | Mar 31, 2010 | Mar 31, 2010 | Cox & Perkins Exploration, Inc. | Jackson | Stafford-Menefee #2 | 4,100 | 23933214 |
| 691011 | Feb 12, 2010 | Feb 12, 2010 | Cox & Perkins Exploration, Inc. | Wharton | Vrana #1 | 9,860 | 48134466 |
| 679704 | Mar 30, 2009 | Mar 30, 2009 | Cox & Perkins Exploration, Inc. | Jackson | Stafford-Menefee #2 | 4,100 | 23933214 |
| 673288 | Oct 21, 2008 | Oct 21, 2008 | Cox & Perkins Exploration, Inc. | Jackson | Stafford-Menefee #1 | 9,995 | 23933213 |
| 667779 | Aug 13, 2008 | Aug 13, 2008 | Cox & Perkins Exploration, Inc. | Lavaca | Andrews et Al #2 | 12,400 | 28533509 |
| 667779Amendment | Aug 13, 2008 | Aug 13, 2008 | Cox & Perkins Exploration, Inc. | Lavaca | Andrews et Al #2 | 12,400 | 28533509 |
| 658813 | Apr 18, 2008 | Apr 18, 2008 | Cox & Perkins Exploration, Inc. | Lavaca | Andrews et Al #1 | 12,700 | 28533477 |
| 656697 | Mar 13, 2008 | Mar 13, 2008 | Cox & Perkins Exploration, Inc. | Lavaca | Fishbeck #2 | 2,900 | 28533471 |
| 651456 | Dec 19, 2007 | Dec 19, 2007 | Cox & Perkins Exploration, Inc. | Lavaca | Fishbeck #1 | 8,300 | 28533450 |
| 650668 | Dec 14, 2007 | Dec 14, 2007 | Cox & Perkins Exploration, Inc. | Hardin | Hankamer #1 | 8,800 | 19933106 |
| 650484 | Dec 8, 2007 | Dec 8, 2007 | Cox & Perkins Exploration, Inc. | Lavaca | Evans #1 | 10,400 | 28533445 |
| 650484Amendment | Dec 8, 2007 | Dec 8, 2007 | Cox & Perkins Exploration, Inc. | Lavaca | Evans Gas Unit #1 | 9,491 | 28533445 |
| 641667 | Jul 12, 2007 | Jul 12, 2007 | Cox & Perkins Exploration, Inc. | Jackson | Hillman #2ST | 10,000 | 23933055 |
| 613847 | Feb 15, 2006 | Feb 15, 2006 | Cox & Perkins Exploration, Inc. | Jackson | Bouligny #1 | 6,000 | 23933361 |
| 613847Amendment | Feb 15, 2006 | Feb 15, 2006 | Cox & Perkins Exploration, Inc. | Jackson | Bouligny #1 | 6,000 | 23933361 |
| 612841 | Jan 26, 2006 | Jan 26, 2006 | Cox & Perkins Exploration, Inc. | Jackson | Hafernick, Lee #1 | 5,000 | 23933359 |
| 609785 | Nov 28, 2005 | Nov 28, 2005 | Cox & Perkins Exploration, Inc. | Wharton | Vrana #1 | 9,860 | 48134466 |
| 609302 | Nov 14, 2005 | Nov 14, 2005 | Cox & Perkins Exploration, Inc. | Wharton | Duson #2 | 5,000 | 48134807 |
| 606341 | Sep 26, 2005 | Sep 26, 2005 | Cox & Perkins Exploration, Inc. | Wharton | Gold, Clarine #1 | 11,400 | 48134793 |
| 606341Amendment | Sep 26, 2005 | Sep 26, 2005 | Cox & Perkins Exploration, Inc. | Wharton | Gold, Clarine #1 | 11,400 | 48134793 |
| 605329 | Aug 23, 2005 | Aug 23, 2005 | Cox & Perkins Exploration, Inc. | Wharton | Vrana #1 | 9,860 | 48134466 |
| 605314 | Aug 23, 2005 | Aug 23, 2005 | Cox & Perkins Exploration, Inc. | Jackson | Stafford-Menefee #3 | 9,910 | 23933227 |
| 605240 | Aug 19, 2005 | Aug 19, 2005 | Cox & Perkins Exploration, Inc. | Jackson | Miller Foundation #2 | 6,000 | 23933335 |
| 605134 | Aug 18, 2005 | Aug 18, 2005 | Cox & Perkins Exploration, Inc. | Jackson | Eugene Labay #1 | 4,500 | 23933334 |
| 601442 | Jun 2, 2005 | Jun 2, 2005 | Cox & Perkins Exploration, Inc. | Jackson | Miller Foundation #1 | 6,000 | 23933314 |
| 551465 | Sep 28, 2004 | Sep 28, 2004 | Cox & Perkins Exploration, Inc. | Jackson | Robert-McHenry #1 | 11,500 | 23933281 |
| 548592 | Jul 26, 2004 | Jul 26, 2004 | Cox & Perkins Exploration, Inc. | Wharton | Mollnar #1 | 9,800 | 48133759 |
| 547426 | Jul 21, 2004 | Jul 21, 2004 | Cox & Perkins Exploration, Inc. | Wharton | Pierce-Mollnar #1ST | 10,400 | 48134273 |
| 545536 | May 13, 2004 | May 13, 2004 | Cox & Perkins Exploration, Inc. | Wharton | Stovall-Payne #1 | 9,975 | 48134439 |
| 535776 | Aug 27, 2003 | Aug 27, 2003 | Cox & Perkins Exploration, Inc. | Wharton | Raun Hutchins-Kelley #1 | 8,500 | 48134567 |
| 534924 | Aug 6, 2003 | Aug 6, 2003 | Cox & Perkins Exploration, Inc. | Jackson | Stafford-Menefee #3 | 10,400 | 23933227 |
| 533250 | Jun 19, 2003 | Jun 19, 2003 | Cox & Perkins Exploration, Inc. | Jackson | Ganado Farms #2 | 5,000 | 23933219 |
| 533249 | Jun 18, 2003 | Jun 18, 2003 | Cox & Perkins Exploration, Inc. | Jackson | Ganado Farms #1 | 5,800 | 23933218 |
| 532497 | May 29, 2003 | May 29, 2003 | Cox & Perkins Exploration, Inc. | Jackson | Lon #1 | 3,900 | 23933215 |
| 532421 | May 28, 2003 | May 28, 2003 | Cox & Perkins Exploration, Inc. | Jackson | Stafford-Menefee #2 | 5,000 | 23933214 |
| 531901 | May 14, 2003 | May 14, 2003 | Cox & Perkins Exploration, Inc. | Colorado | Wegenhoft #1 | 7,012 | 08932020 |
| 531901Amendment | May 14, 2003 | May 14, 2003 | Cox & Perkins Exploration, Inc. | Colorado | Wegenhoft #1 | 7,012 | 08932020 |
| 531736 | May 9, 2003 | May 9, 2003 | Cox & Perkins Exploration, Inc. | Jackson | Stafford-Menefee #1 | 10,400 | 23933213 |
| 529742 | Mar 19, 2003 | Mar 19, 2003 | Cox & Perkins Exploration, Inc. | Wharton | Borak #1 | 10,000 | 48134526 |
| 527811 | Jan 28, 2003 | Jan 28, 2003 | Cox & Perkins Exploration, Inc. | Wharton | Hlavaty-Dockal #1 | 10,200 | 48134508 |
| 527620 | Jan 27, 2003 | Jan 27, 2003 | Cox & Perkins Exploration, Inc. | Wharton | Delbur Swanson #1 | 9,300 | 48134505 |
| 527620Amendment | Jan 27, 2003 | Jan 27, 2003 | Cox & Perkins Exploration, Inc. | Wharton | Delbur Swanson #1 | 9,300 | 48134505 |
| 527386 | Jan 16, 2003 | Jan 16, 2003 | Cox & Perkins Exploration, Inc. | Jackson | Germer-Sample #2 | 5,160 | 23932794 |
| 522895 | Aug 19, 2002 | Aug 19, 2002 | Cox & Perkins Exploration, Inc. | Wharton | Vrana #1 | 10,500 | 48134466 |
| 522168 | Jul 25, 2002 | Jul 25, 2002 | Cox & Perkins Exploration, Inc. | Wharton | Hafernick #1 | 10,500 | 48134461 |
| 520966 | Jun 13, 2002 | Jun 13, 2002 | Cox & Perkins Exploration, Inc. | Wharton | Stovall, Guy Jr. #1 | 6,000 | 48134454 |
| 520060Amendment | May 16, 2002 | May 16, 2002 | Cox & Perkins Exploration, Inc. | Wharton | Stovall-Payne #2 | 15,000 | 48134448 |
| 520060Amendment | May 16, 2002 | May 16, 2002 | Cox & Perkins Exploration, Inc. | Wharton | Stovall-Payne #2 | 15,000 | 48134448 |
| 519523 | May 2, 2002 | May 2, 2002 | Cox & Perkins Exploration, Inc. | Colorado | M Plus Land #1 | 7,018 | 08931994 |
| 519522 | May 2, 2002 | May 2, 2002 | Cox & Perkins Exploration, Inc. | Jackson | Porche No. 1 Gas Unit #2 | 10,630 | 23932803 |
| 519350 | Apr 23, 2002 | Apr 23, 2002 | Cox & Perkins Exploration, Inc. | Wharton | Stovall-Payne #1 | 10,500 | 48134439 |
| 515388 | Nov 15, 2001 | Nov 15, 2001 | Cox & Perkins Exploration, Inc. | Wharton | Della #1 | 9,850 | 48133946 |
| 514728 | Oct 24, 2001 | Oct 24, 2001 | Cox & Perkins Exploration, Inc. | Wharton | Miller, V. E. #1 | 12,800 | 48134415 |
| 513928 | Sep 26, 2001 | Sep 26, 2001 | Cox & Perkins Exploration, Inc. | Wharton | Duson #1 | 11,100 | 48134410 |
| 513647 | Sep 25, 2001 | Sep 25, 2001 | Cox & Perkins Exploration, Inc. | Wharton | Mitchell #1 | 8,900 | 48133942 |
| 511526 | Jul 19, 2001 | Jul 19, 2001 | Cox & Perkins Exploration, Inc. | Colorado | Wegenhoft #1 | 7,012 | 08932020 |
| 511467 | Jul 17, 2001 | Jul 17, 2001 | Cox & Perkins Exploration, Inc. | Colorado | M Plus Land #1 | 7,018 | 08931994 |
| 508154 | Apr 25, 2001 | Apr 25, 2001 | Cox & Perkins Exploration, Inc. | Wharton | Kainer #1 | 11,500 | 48134346 |
| 505525 | Feb 21, 2001 | Feb 21, 2001 | Cox & Perkins Exploration, Inc. | Colorado | Gracey-Wegenhoft #1 | 17,000 | 08932285 |
| 505123 | Feb 14, 2001 | Feb 14, 2001 | Cox & Perkins Exploration, Inc. | Colorado | Swinbank #2 | 4,000 | 08932283 |
| 504616 | Jan 26, 2001 | Jan 26, 2001 | Cox & Perkins Exploration, Inc. | Colorado | Mary Ann #1 | 3,977 | 08932045 |
| 501780 | Nov 9, 2000 | Nov 9, 2000 | Cox & Perkins Exploration, Inc. | Jackson | Porche #1ST | 10,500 | 23932441 |
| 500764 | Oct 16, 2000 | Oct 16, 2000 | Cox & Perkins Exploration, Inc. | Wharton | Pierce-Mollnar #1 | 10,400 | 48134273 |
| 499657 | Sep 15, 2000 | Sep 15, 2000 | Cox & Perkins Exploration, Inc. | Wharton | Fikac #1 | 4,900 | 48134261 |
| 499657Amendment | Sep 15, 2000 | Sep 15, 2000 | Cox & Perkins Exploration, Inc. | Wharton | Fikac #1 | 4,900 | 48134261 |
| 498314 | Aug 16, 2000 | Aug 16, 2000 | Cox & Perkins Exploration, Inc. | Colorado | Ray #1 | 4,900 | 08932039 |
| 498373 | Aug 11, 2000 | Aug 11, 2000 | Cox & Perkins Exploration, Inc. | Wharton | Gold-Zapp #3 | 11,200 | 48134244 |
| 495780 | Jun 6, 2000 | Jun 6, 2000 | Cox & Perkins Exploration, Inc. | Colorado | Ray #1 | 4,900 | 08932039 |
| 493729 | Apr 4, 2000 | Apr 4, 2000 | Cox & Perkins Exploration, Inc. | Jackson | Porche #3 | 10,800 | 23933063 |
| 491149 | Jan 18, 2000 | Jan 18, 2000 | Cox & Perkins Exploration, Inc. | Jackson | Hillman #2 | 10,500 | 23933055 |
| 488504 | Oct 18, 1999 | Oct 18, 1999 | Cox & Perkins Exploration, Inc. | Colorado | Witter, Scott #1 | 4,000 | 08932027 |
| 487570 | Sep 15, 1999 | Sep 15, 1999 | Cox & Perkins Exploration, Inc. | Wharton | Longmire #1 | 3,000 | 48133972 |
| 486094 | Aug 17, 1999 | Aug 17, 1999 | Cox & Perkins Exploration, Inc. | Burleson | Leggio-Schubert Unit #1REH | 9,000 | 05131207 |
| 486329 | Aug 4, 1999 | Aug 4, 1999 | Cox & Perkins Exploration, Inc. | Burleson | Crook Unit #3REH | 9,000 | 05133098 |
| 480900 | Nov 16, 1998 | Nov 16, 1998 | Cox & Perkins Exploration, Inc. | Colorado | M Plus Land #2D | 9,950 | 08932028 |
| 477472 | Jun 26, 1998 | Jun 26, 1998 | Cox & Perkins Exploration, Inc. | Colorado | Sue #1ST | 9,800 | 08931985 |
| 474381 | Apr 14, 1998 | Apr 14, 1998 | Cox & Perkins Exploration, Inc. | Harris | Keyser-Kroll No. 1 Gas Unit #1 | 12,370 | 20132503 |
| 473960 | Mar 4, 1998 | Mar 4, 1998 | Cox & Perkins Exploration, Inc. | Wharton | Lange No. 1 Gas Unit #1ST | 10,000 | 48133841 |
| 472759 | Feb 2, 1998 | Feb 2, 1998 | Cox & Perkins Exploration, Inc. | Colorado | George #1 | 6,939 | 08932043 |
| 469731 | Nov 6, 1997 | Nov 6, 1997 | Cox & Perkins Exploration, Inc. | Wharton | Gadeke Gas Unit #1 | 5,500 | 48133858 |
| 464972 | Jul 17, 1997 | Jul 17, 1997 | Cox & Perkins Exploration, Inc. | Colorado | Arthur #1 | 15,000 | 08932053 |
| 463880 | Jun 19, 1997 | Jun 19, 1997 | Cox & Perkins Exploration, Inc. | Wharton | Gadeke Gas Unit #1 | 8,235 | 48133858 |
| 463879 | Jun 18, 1997 | Jun 18, 1997 | Cox & Perkins Exploration, Inc. | Colorado | Mahalitc #1 | 10,500 | 08932049 |
| 463336 | Jun 6, 1997 | Jun 6, 1997 | Cox & Perkins Exploration, Inc. | Harris | Keyser-Kroll #1 | 13,200 | 20132503 |
| 462572 | May 20, 1997 | May 20, 1997 | Cox & Perkins Exploration, Inc. | Wharton | Longmire #1 | 4,900 | 48133972 |
| 462572Amendment | May 20, 1997 | May 20, 1997 | Cox & Perkins Exploration, Inc. | Wharton | Longmire #1 | 4,900 | 48133972 |
| 461907 | May 5, 1997 | May 5, 1997 | Cox & Perkins Exploration, Inc. | Colorado | Mary Ann #1 | 4,900 | 08932045 |
| 461907Amendment | May 5, 1997 | May 5, 1997 | Cox & Perkins Exploration, Inc. | Colorado | Mary Ann #1 | 4,900 | 08932045 |
| 461721 | Apr 30, 1997 | Apr 30, 1997 | Cox & Perkins Exploration, Inc. | Colorado | George #1 | 7,350 | 08932043 |
| 461721Amendment | Apr 30, 1997 | Apr 30, 1997 | Cox & Perkins Exploration, Inc. | Colorado | George #1 | 7,350 | 08932043 |
| 461436 | Apr 23, 1997 | Apr 23, 1997 | Cox & Perkins Exploration, Inc. | Harris | Garth-Wallisville #1 | 15,700 | 20132490 |
| 460877 | Apr 9, 1997 | Apr 9, 1997 | Cox & Perkins Exploration, Inc. | Wharton | Mollnar #2 | 11,300 | 48133798 |
| 460876 | Apr 9, 1997 | Apr 9, 1997 | Cox & Perkins Exploration, Inc. | Wharton | Swanson-Meek Gas Unit #1 | 10,714 | 48133876 |
| 460788 | Apr 9, 1997 | Apr 9, 1997 | Cox & Perkins Exploration, Inc. | Colorado | Ray #1 | 4,900 | 08932039 |
| 460163 | Mar 21, 1997 | Mar 21, 1997 | Cox & Perkins Exploration, Inc. | Jackson | Yearwood #1 | 4,400 | 23932865 |
| 459178 | Feb 27, 1997 | Feb 27, 1997 | Cox & Perkins Exploration, Inc. | Wharton | Halamicek #1 | 11,200 | 48133958 |
| 458545 | Feb 19, 1997 | Feb 19, 1997 | Cox & Perkins Exploration, Inc. | Wharton | Couey #2 | 5,500 | 48133956 |