| 626072 | Sep 18, 2006 | Sep 18, 2006 | Young, Marshall R., Oil Co. | Parker | Odr Unit #2HH | 10,600 | 36734176 |
| 625623 | Sep 8, 2006 | Sep 8, 2006 | Young, Marshall R., Oil Co. | Tarrant | Boswell #1 | 9,000 | 43931758 |
| 625014 | Aug 28, 2006 | Aug 28, 2006 | Young, Marshall R., Oil Co. | Parker | Odr Unit #1HH | 6,200 | 36734149 |
| 620565 | Jun 7, 2006 | Jun 7, 2006 | Young, Marshall R., Oil Co. | Johnson | Vortex SWD #1 | 11,500 | 25131020 |
| 620565Amendment | Jun 7, 2006 | Jun 7, 2006 | Young, Marshall R., Oil Co. | Johnson | Vortex SWD #1 | 11,500 | 25131020 |
| 610266 | Nov 30, 2005 | Nov 30, 2005 | Young, Marshall R., Oil Co. | Parker | Clemens #2HH | 6,700 | 36733843 |
| 606053 | Sep 8, 2005 | Sep 8, 2005 | Young, Marshall R., Oil Co. | Hood | Helton #1HH | 10,350 | 22131040 |
| 601233 | May 26, 2005 | May 26, 2005 | Young, Marshall R., Oil Co. | Parker | Clemens #1HH | 7,216 | 36733728 |
| 545443 | May 7, 2004 | May 7, 2004 | Young, Marshall R., Oil Company | Hockley | Nipper #1 | 9,651 | 21936551 |
| 537893 | Oct 24, 2003 | Oct 24, 2003 | Young, Marshall R., Oil Company | Gaines | Beckham #2 | 7,250 | 16535721 |
| 537000 | Sep 30, 2003 | Sep 30, 2003 | Young, Marshall R., Oil Co. | Parker | Wiley #2 | 7,800 | 36733463 |
| 519093 | Apr 15, 2002 | Apr 15, 2002 | Young, Marshall R., Oil Company | Hockley | Nipper Unit #2 | 8,700 | 21936647 |
| 519056 | Apr 12, 2002 | Apr 12, 2002 | Young, Marshall R., Oil Company | Gaines | Shelton #1 | 7,900 | 16535826 |
| 514582 | Nov 9, 2001 | Nov 9, 2001 | Young, Marshall R., Oil Company | Tarrant | Johnson Ranch #1 | 7,250 | 43930270 |
| 514994 | Nov 6, 2001 | Nov 6, 2001 | Young, Marshall R., Oil Company | Parker | Wiley #1 | 7,250 | 36733406 |
| 515014 | Nov 2, 2001 | Nov 2, 2001 | Young, Marshall R., Oil Company | Gaines | Birge Sec 28 #1 | 7,200 | 16535800 |
| 514465 | Oct 17, 2001 | Oct 17, 2001 | Young, Marshall R., Oil Company | Hockley | Goodpasture #1 | 8,300 | 21936626 |
| 513254 | Sep 5, 2001 | Sep 5, 2001 | Young, Marshall R., Oil Company | Terry | Northwest Terry (Abo) Unit #309 | 8,200 | 44531973 |
| 512742 | Aug 22, 2001 | Aug 22, 2001 | Young, Marshall R., Oil Company | Gaines | Golden #1 | 7,000 | 16535785 |
| 512723 | Aug 17, 2001 | Aug 17, 2001 | Young, Marshall R., Oil Company | Gaines | Beckham #4 | 7,500 | 16535783 |
| 512722 | Aug 17, 2001 | Aug 17, 2001 | Young, Marshall R., Oil Company | Gaines | Beckham #3 | 7,500 | 16535784 |
| 509776 | Jun 5, 2001 | Jun 5, 2001 | Young, Marshall R., Oil Company | Gaines | Birge Sec 1 #1 | 7,200 | 16535758 |
| 509048 | May 18, 2001 | May 18, 2001 | Young, Marshall R., Oil Company | Gaines | Fogerson #1 | 7,200 | 16535748 |
| 506993 | Mar 28, 2001 | Mar 28, 2001 | Young, Marshall R., Oil Company | Gaines | Beckham #2 | 7,200 | 16535721 |
| 505741 | Feb 28, 2001 | Feb 28, 2001 | Young, Marshall R., Oil Company | Gaines | Warren #4 | 7,400 | 16535694 |
| 501329 | Nov 3, 2000 | Nov 3, 2000 | Young, Marshall R., Oil Company | Hockley | Nipper #1 | 9,800 | 21936551 |
| 500029 | Sep 25, 2000 | Sep 25, 2000 | Young, Marshall R., Oil Company | Gaines | Oates Unit #1 | 5,900 | 16535641 |
| 498259 | Aug 15, 2000 | Aug 15, 2000 | Young, Marshall R., Oil Company | Gaines | Warren #3 | 7,400 | 16535611 |
| 497559 | Jul 24, 2000 | Jul 24, 2000 | Young, Marshall R., Oil Company | Gaines | Rowpatt #2 | 7,400 | 16535578 |
| 496193 | Jun 19, 2000 | Jun 19, 2000 | Young, Marshall R., Oil Company | Gaines | Higgins Unit #1 | 7,400 | 16535542 |
| 495366 | Jun 19, 2000 | Jun 19, 2000 | Young, Marshall R., Oil Company | Gaines | Forbes 17 #1 | 7,400 | 16535534 |
| 495804 | Jun 7, 2000 | Jun 7, 2000 | Young, Marshall R., Oil Company | Gaines | Forbes #2 | 7,400 | 16535538 |
| 495804Amendment | Jun 7, 2000 | Jun 7, 2000 | Young, Marshall R., Oil Company | Gaines | Forbes #2 | 7,400 | 16535538 |
| 495760 | Jun 6, 2000 | Jun 6, 2000 | Young, Marshall R., Oil Company | Gaines | Birge 100 #1 | 11,500 | 16535537 |
| 495295 | May 19, 2000 | May 19, 2000 | Young, Marshall R., Oil Company | Gaines | Forbes #1 | 7,400 | 16535528 |
| 495293 | May 19, 2000 | May 19, 2000 | Young, Marshall R., Oil Company | Gaines | Brooks #6 | 7,400 | 16535530 |
| 495292 | May 19, 2000 | May 19, 2000 | Young, Marshall R., Oil Company | Gaines | Brooks #5 | 7,400 | 16535529 |
| 493820 | Apr 10, 2000 | Apr 10, 2000 | Young, Marshall R., Oil Company | Gaines | Warren #2 | 7,400 | 16535511 |
| 493709 | Apr 4, 2000 | Apr 4, 2000 | Young, Marshall R., Oil Company | Gaines | Brooks #4 | 7,200 | 16535509 |
| 492757 | Mar 8, 2000 | Mar 8, 2000 | Young, Marshall R., Oil Company | Hockley | Marcom #1 | 10,600 | 21936512 |
| 492200 | Feb 18, 2000 | Feb 18, 2000 | Young, Marshall R., Oil Company | Gaines | Brooks #3 | 7,500 | 16535499 |
| 490094 | Dec 9, 1999 | Dec 9, 1999 | Young, Marshall R., Oil Company | Yoakum | Johnson, Wilma "A" #1 | 8,870 | 50132325 |
| 490085 | Dec 8, 1999 | Dec 8, 1999 | Young, Marshall R., Oil Company | Hockley | Millennium #1 | 9,800 | 21936499 |
| 487820 | Sep 23, 1999 | Sep 23, 1999 | Young, Marshall R., Oil Company | Gaines | Brooks #2 | 7,500 | 16535462 |
| 487632 | Sep 16, 1999 | Sep 16, 1999 | Young, Marshall R., Oil Company | Gaines | Mobil-Arco 75 #1 | 8,900 | 16535460 |
| 485454 | Jun 28, 1999 | Jun 28, 1999 | Young, Marshall R., Oil Company | Gaines | Beckham #1 | 6,200 | 16535428 |
| 479723 | Sep 25, 1998 | Sep 25, 1998 | Young, Marshall R., Oil Company | Shackelford | Cook, W. I. Estate, Sec. 64 #9 | 5,000 | 41737887 |
| 479677 | Sep 24, 1998 | Sep 24, 1998 | Young, Marshall R., Oil Company | Jones | McIllwain #4 | 2,650 | 25334342 |
| 479180 | Sep 1, 1998 | Sep 1, 1998 | Young, Marshall R., Oil Company | Fisher | Mann Unit #1 | 5,850 | 15132375 |
| 479100 | Aug 28, 1998 | Aug 28, 1998 | Young, Marshall R., Oil Company | Jones | McIlwain #2 | 3,300 | 25334328 |
| 479091 | Aug 28, 1998 | Aug 28, 1998 | Young, Marshall R., Oil Company | Jones | McIlwain #3 | 2,600 | 25334341 |
| 479006 | Aug 26, 1998 | Aug 26, 1998 | Young, Marshall R., Oil Company | Jones | McIlwain #1 | 3,321 | 25334320 |
| 475996 | Jun 3, 1998 | Jun 3, 1998 | Young, Marshall R., Oil Company | Hockley | McCorkle Unit #1 | 9,800 | 21936436 |
| 474234 | Mar 10, 1998 | Mar 10, 1998 | Young, Marshall R., Oil Company | Gaines | Rowpatt #1 | 7,500 | 16510004 |
| 473488 | Feb 18, 1998 | Feb 18, 1998 | Young, Marshall R., Oil Company | Gaines | Brooks #1 | 7,500 | 16535332 |
| 472649 | Jan 26, 1998 | Jan 26, 1998 | Young, Marshall R., Oil Company | Gaines | Birge-Forbes Unit #1 | 7,500 | 16535324 |
| 472551 | Jan 23, 1998 | Jan 23, 1998 | Young, Marshall R., Oil Company | Gaines | Warren #1 | 7,500 | 16535323 |
| 472367 | Jan 23, 1998 | Jan 23, 1998 | Young, Marshall R., Oil Company | Hockley | Hamilton Unit #1 | 10,500 | 21936408 |
| 469941 | Nov 12, 1997 | Nov 12, 1997 | Young, Marshall R., Oil Company | Hockley | Smallwood #1 | 10,500 | 21936372 |
| 469941Amendment | Nov 12, 1997 | Nov 12, 1997 | Young, Marshall R., Oil Company | Hockley | Smallwood #1 | 10,500 | 21936372 |
| 469940 | Nov 12, 1997 | Nov 12, 1997 | Young, Marshall R., Oil Company | Gaines | Birge #3 | 7,500 | 16535298 |
| 469253 | Oct 24, 1997 | Oct 24, 1997 | Young, Marshall R., Oil Company | Gaines | Birge #2 | 7,500 | 16535294 |
| 468931 | Oct 17, 1997 | Oct 17, 1997 | Young, Marshall R., Oil Company | Anderson | Billett #1 | 4,500 | 00132272 |
| 468931Amendment | Oct 17, 1997 | Oct 17, 1997 | Young, Marshall R., Oil Company | Anderson | Billett #1 | 4,500 | 00132272 |
| 468931Amendment | Oct 17, 1997 | Oct 17, 1997 | Young, Marshall R., Oil Company | Anderson | Billett #1 | 4,500 | 00132272 |
| 468893 | Oct 16, 1997 | Oct 16, 1997 | Young, Marshall R., Oil Company | Jones | Gray #2 | 3,100 | 25334421 |
| 468893Amendment | Oct 16, 1997 | Oct 16, 1997 | Young, Marshall R., Oil Company | Jones | Bagley #1 | 3,200 | 25334421 |
| 468085 | Sep 26, 1997 | Sep 26, 1997 | Young, Marshall R., Oil Company | Gaines | Klattenhoff #1 | 12,800 | 16535275 |
| 466446 | Aug 19, 1997 | Aug 19, 1997 | Young, Marshall R., Oil Company | Gaines | Birge #1 | 7,500 | 16535244 |
| 465551 | Aug 4, 1997 | Aug 4, 1997 | Young, Marshall R., Oil Company | Jones | Gray Unit #1 | 3,600 | 25334411 |
| 465551Amendment | Aug 4, 1997 | Aug 4, 1997 | Young, Marshall R., Oil Company | Jones | Gray Unit #1 | 3,600 | 25334411 |
| 465375 | Aug 4, 1997 | Aug 4, 1997 | Young, Marshall R., Oil Company | Gaines | Arco-Mobil #1 | 12,500 | 16535220 |
| 464744 | Jul 10, 1997 | Jul 10, 1997 | Young, Marshall R., Oil Company | Hockley | Gresham Unit #1 | 10,000 | 21936350 |
| 464658 | Jul 8, 1997 | Jul 8, 1997 | Young, Marshall R., Oil Company | Hockley | Arnwine #1 | 10,000 | 21936349 |
| 463130 | May 30, 1997 | May 30, 1997 | Young, Marshall R., Oil Company | Shackelford | Newell, Dell Sec. 2 #24 | 2,000 | 41738148 |
| 463129 | May 30, 1997 | May 30, 1997 | Young, Marshall R., Oil Company | Shackelford | Newell, Dell Sec. 2 #22 | 2,000 | 41738147 |
| 463128 | May 30, 1997 | May 30, 1997 | Young, Marshall R., Oil Company | Shackelford | Newell, Dell Sec. 2 #23 | 2,000 | 41738146 |
| 461060 | Apr 14, 1997 | Apr 14, 1997 | Young, Marshall R., Oil Company | Shackelford | Newell, Dell Sec. 2 #21 | 2,100 | 41738133 |
| 461058 | Apr 14, 1997 | Apr 14, 1997 | Young, Marshall R., Oil Company | Shackelford | Newell, Dell Sec. 2 #20 | 2,100 | 41738134 |
| 457335 | Jan 21, 1997 | Jan 21, 1997 | Young, Marshall R., Oil Company | Jones | Buie #1 | 4,500 | 25334379 |
| 457336 | Jan 17, 1997 | Jan 17, 1997 | Young, Marshall R., Oil Company | Jones | Watkins #1 | 2,800 | 25334377 |
| 455881 | Dec 23, 1996 | Dec 23, 1996 | Young, Marshall R., Oil Company | Jones | Muehlstein 45 #1 | 3,200 | 25334251 |
| 454869 | Nov 8, 1996 | Nov 8, 1996 | Young, Marshall R., Oil Company | Shackelford | Newell, Dell Section 86 #19 | 3,400 | 41738086 |
| 449802 | Jun 28, 1996 | Jun 28, 1996 | Young, Marshall R., Oil Company | Jones | B. Spraberry Unit #2 | 4,250 | 25334340 |
| 449800 | Jun 28, 1996 | Jun 28, 1996 | Young, Marshall R., Oil Company | Jones | McIlwain #4 | 2,900 | 25334342 |
| 449799 | Jun 28, 1996 | Jun 28, 1996 | Young, Marshall R., Oil Company | Jones | McIlwain #3 | 2,900 | 25334341 |
| 447762 | May 3, 1996 | May 3, 1996 | Young, Marshall R., Oil Company | Jones | McIlwain #2 | 3,800 | 25334328 |
| 447185 | Apr 18, 1996 | Apr 18, 1996 | Young, Marshall R., Oil Company | Jones | M. Spraberry Unit #1 | 3,900 | 25334326 |
| 446078 | Mar 20, 1996 | Mar 20, 1996 | Young, Marshall R., Oil Company | Jones | Whittemore #1 | 4,250 | 25334319 |
| 446078Amendment | Mar 20, 1996 | Mar 20, 1996 | Young, Marshall R., Oil Company | Jones | Whittemore #1 | 4,250 | 25334319 |
| 446077 | Mar 20, 1996 | Mar 20, 1996 | Young, Marshall R., Oil Company | Jones | McIlwain #1 | 3,800 | 25334320 |
| 446076 | Mar 20, 1996 | Mar 20, 1996 | Young, Marshall R., Oil Company | Jones | Baize #1 | 3,200 | 25334321 |
| 445536 | Mar 7, 1996 | Mar 7, 1996 | Young, Marshall R., Oil Company | Shackelford | Newell, Dell Sec. 2 #18 | 2,000 | 41738017 |
| 445535 | Mar 7, 1996 | Mar 7, 1996 | Young, Marshall R., Oil Company | Shackelford | Newell, Dell Sec. 2 #19 | 2,000 | 41738016 |
| 444974 | Mar 5, 1996 | Mar 5, 1996 | Young, Marshall R., Oil Company | Shackelford | Newell, Dell Sec. 2 #17 | 2,000 | 41738013 |
| 443588 | Feb 15, 1996 | Feb 15, 1996 | Young, Marshall R., Oil Company | Anderson | Ware #1X | 4,500 | 00132232 |
| 444148 | Feb 5, 1996 | Feb 5, 1996 | Young, Marshall R., Oil Company | Shackelford | Newell, Dell Sec. 2 #16 | 2,000 | 41738003 |
| 440752 | Nov 7, 1995 | Nov 7, 1995 | Young, Marshall R., Oil Company | Jones | Bearden #1 | 3,800 | 25334286 |
| 441490 | Nov 3, 1995 | Nov 3, 1995 | Young, Marshall R., Oil Company | Jones | Hays Unit #1 | 3,800 | 25334289 |
| 441102 | Oct 23, 1995 | Oct 23, 1995 | Young, Marshall R., Oil Company | Gaines | Robertson, Dorothy #1 | 6,000 | 16534922 |