| 503352 | Dec 21, 2000 | Dec 21, 2000 | Cobra Oil & Gas Corporation | Hardin | Blackstone 493 #1 | 10,000 | 19932822 |
| 501457 | Oct 31, 2000 | Oct 31, 2000 | Cobra Oil & Gas Corporation | Hardin | Fortenberry 741 #1 | 10,500 | 19932816 |
| 499664 | Sep 15, 2000 | Sep 15, 2000 | Cobra Oil & Gas Corporation | Fort Bend | Cosmonaut #1 | 10,500 | 15732115 |
| 499663 | Sep 15, 2000 | Sep 15, 2000 | Cobra Oil & Gas Corporation | Liberty | Apache Corp. #1 | 11,000 | 29132366 |
| 499663Amendment | Sep 15, 2000 | Sep 15, 2000 | Cobra Oil & Gas Corporation | Liberty | Apache Corporation #1A | 11,500 | 29132366 |
| 498428 | Sep 5, 2000 | Sep 5, 2000 | Cobra Oil & Gas Corporation | Liberty | Champion #1 | 10,000 | 29132361 |
| 499162 | Sep 1, 2000 | Sep 1, 2000 | Cobra Oil & Gas Corporation | Hardin | Vastar Resources 115 #1 | 10,000 | 19932811 |
| 499162Amendment | Sep 1, 2000 | Sep 1, 2000 | Cobra Oil & Gas Corporation | Hardin | Vastar Resources 115 #1 | 10,000 | 19932811 |
| 498430 | Aug 14, 2000 | Aug 14, 2000 | Cobra Oil & Gas Corporation | Fort Bend | Libra Unit #2 | 9,500 | 15732108 |
| 493963 | Apr 14, 2000 | Apr 14, 2000 | Cobra Oil & Gas Corporation | Fort Bend | Libra Unit #1 | 9,000 | 15732091 |
| 493963Amendment | Apr 14, 2000 | Apr 14, 2000 | Cobra Oil & Gas Corporation | Fort Bend | Libra Unit #1 | 9,000 | 15732091 |
| 493656 | Mar 31, 2000 | Mar 31, 2000 | Cobra Oil & Gas Corporation | Hardin | Black Stone Minerals Company #1 | 11,000 | 19932801 |
| 493349 | Mar 23, 2000 | Mar 23, 2000 | Cobra Oil & Gas Corporation | Fort Bend | Mercury Gas Unit #2 | 9,000 | 15732073 |
| 493295 | Mar 21, 2000 | Mar 21, 2000 | Cobra Oil & Gas Corporation | Sterling | McDonald 205 #1 | 8,000 | 43132985 |
| 492738 | Mar 6, 2000 | Mar 6, 2000 | Cobra Oil & Gas Corporation | Hardin | Cullen Trusts #1 | 10,000 | 19932799 |
| 491053 | Jan 13, 2000 | Jan 13, 2000 | Cobra Oil & Gas Corporation | Fort Bend | Caldwell Gas Unit #1 | 14,000 | 15732085 |
| 489609 | Nov 17, 1999 | Nov 17, 1999 | Cobra Oil & Gas Corporation | Liberty | Moore Unit #2 | 12,000 | 29132343 |
| 488406 | Oct 11, 1999 | Oct 11, 1999 | Cobra Oil & Gas Corporation | Glasscock | Smith Unit 7 #1 | 8,000 | 17332994 |
| 488061 | Sep 29, 1999 | Sep 29, 1999 | Cobra Oil & Gas Corporation | Fort Bend | Mercury Gas Unit #2 | 9,000 | 15732073 |
| 487726 | Sep 20, 1999 | Sep 20, 1999 | Cobra Oil & Gas Corporation | Liberty | Moore Unit #1 | 12,500 | 29132338 |
| 486851 | Aug 20, 1999 | Aug 20, 1999 | Cobra Oil & Gas Corporation | Sterling | Stewart 16 #1 | 8,200 | 43132969 |
| 485817 | Jul 13, 1999 | Jul 13, 1999 | Cobra Oil & Gas Corporation | Fort Bend | Wilson Unit #1 | 5,400 | 15732062 |
| 485292 | Jun 17, 1999 | Jun 17, 1999 | Cobra Oil & Gas Corporation | Fort Bend | Gemini Gas Unit #1 | 9,000 | 15732055 |
| 485137 | Jun 10, 1999 | Jun 10, 1999 | Cobra Oil & Gas Corporation | Fort Bend | Mercury Gas Unit #1 | 9,000 | 15732054 |
| 485137Amendment | Jun 10, 1999 | Jun 10, 1999 | Cobra Oil & Gas Corporation | Fort Bend | Mercury Gas Unit #1 | 9,000 | 15732054 |
| 484000 | Apr 21, 1999 | Apr 21, 1999 | Cobra Oil & Gas Corporation | Crane | McElroy Ranch 44 #1 | 8,200 | 10334685 |
| 483257 | Mar 12, 1999 | Mar 12, 1999 | Cobra Oil & Gas Corporation | Fort Bend | Tigner 1 #1 | 9,000 | 15732043 |
| 478073 | Jul 17, 1998 | Jul 17, 1998 | Cobra Oil & Gas Corporation | Crane | McElroy Deep #1 | 9,200 | 10334572 |
| 477552 | Jun 29, 1998 | Jun 29, 1998 | Cobra Oil & Gas Corporation | Crane | Mud Weasel #1 | 5,100 | 10334646 |
| 477551 | Jun 29, 1998 | Jun 29, 1998 | Cobra Oil & Gas Corporation | Martin | Chevron 4 #1 | 11,000 | 31734191 |
| 476698 | May 28, 1998 | May 28, 1998 | Cobra Oil & Gas Corporation | Brazoria | Farms, I. P.-Kandelly #1 | 13,000 | 03932641 |
| 476098 | May 7, 1998 | May 7, 1998 | Cobra Oil & Gas Corporation | Maverick | Chittim Ranch #1292 | 6,000 | 32332507 |
| 475393 | Apr 16, 1998 | Apr 16, 1998 | Cobra Oil & Gas Corporation | Martin | Heredia 46 Unit #1 | 11,000 | 31734012 |
| 475393Amendment | Apr 16, 1998 | Apr 16, 1998 | Cobra Oil & Gas Corporation | Martin | Heredia 46 Unit #1 | 11,000 | 31734012 |
| 473808 | Feb 26, 1998 | Feb 26, 1998 | Cobra Oil & Gas Corporation | Howard | Nichols-Odd Fellows Unit #1 | 9,700 | 22734790 |
| 473808Amendment | Feb 26, 1998 | Feb 26, 1998 | Cobra Oil & Gas Corporation | Howard | Nichols-Odd Fellows Unit #1 | 9,700 | 22734790 |
| 472708 | Jan 28, 1998 | Jan 28, 1998 | Cobra Oil & Gas Corporation | Maverick | Chittim Ranch #1582 | 6,000 | 32332513 |
| 472127 | Jan 12, 1998 | Jan 12, 1998 | Cobra Oil & Gas Corporation | Martin | Allar 45 #1 | 11,000 | 31734112 |
| 469071 | Oct 21, 1997 | Oct 21, 1997 | Cobra Oil & Gas Corporation | Howard | Gaskins Unit #1 | 10,473 | 22734911 |
| 468332 | Oct 2, 1997 | Oct 2, 1997 | Cobra Oil & Gas Corporation | Maverick | Chittim Ranch #1581 | 6,000 | 32332509 |
| 467614 | Sep 15, 1997 | Sep 15, 1997 | Cobra Oil & Gas Corporation | Maverick | Chittim Ranch #1591 | 6,000 | 32332508 |
| 466733 | Aug 25, 1997 | Aug 25, 1997 | Cobra Oil & Gas Corporation | Howard | Little Unit 31 #1 | 10,000 | 22735238 |
| 466609 | Aug 21, 1997 | Aug 21, 1997 | Cobra Oil & Gas Corporation | Maverick | Chittim Ranch #1292 | 6,000 | 32332507 |
| 465064 | Jul 17, 1997 | Jul 17, 1997 | Cobra Oil & Gas Corporation | Martin | Allar 45 #1 | 11,000 | 31734112 |
| 465064Amendment | Jul 17, 1997 | Jul 17, 1997 | Cobra Oil & Gas Corporation | Martin | Allar 45 #1 | 11,000 | 31734112 |
| 464818 | Jul 11, 1997 | Jul 11, 1997 | Cobra Oil & Gas Corporation | Howard | Gaskins Unit #1 | 9,600 | 22734911 |
| 463887 | Jun 17, 1997 | Jun 17, 1997 | Cobra Oil & Gas Corporation | Howard | Hatch 24 #1 | 11,000 | 22735224 |
| 462778 | May 22, 1997 | May 22, 1997 | Cobra Oil & Gas Corporation | Howard | Adams Unit 47 #1 | 9,500 | 22735216 |
| 462484 | May 15, 1997 | May 15, 1997 | Cobra Oil & Gas Corporation | San Patricio | Priday Unit #1 | 12,000 | 40932527 |
| 461816 | Apr 30, 1997 | Apr 30, 1997 | Cobra Oil & Gas Corporation | Martin | Adams 38 #1 | 10,700 | 31734006 |
| 461504 | Apr 22, 1997 | Apr 22, 1997 | Cobra Oil & Gas Corporation | Glasscock | Kolb 12 #2 | 8,500 | 17332763 |
| 461503 | Apr 22, 1997 | Apr 22, 1997 | Cobra Oil & Gas Corporation | Maverick | Chittim Ranch 128 #1 | 6,000 | 32332384 |
| 460940 | Apr 9, 1997 | Apr 9, 1997 | Cobra Oil & Gas Corporation | Dawson | Adcock - Turner Unit #1 | 9,500 | 11532962 |
| 460540 | Mar 31, 1997 | Mar 31, 1997 | Cobra Oil & Gas Corporation | Dawson | Turner, Everett 2 #1H | 12,300 | 11532904 |
| 459991 | Mar 17, 1997 | Mar 17, 1997 | Cobra Oil & Gas Corporation | Maverick | Chittim Ranch 129 #1 | 6,000 | 32332396 |
| 459823 | Mar 12, 1997 | Mar 12, 1997 | Cobra Oil & Gas Corporation | Maverick | Chittim Ranch 143 #1 | 6,000 | 32332405 |
| 459610 | Mar 7, 1997 | Mar 7, 1997 | Cobra Oil & Gas Corporation | Dawson | Morris "a" 23 #1 | 10,000 | 11532958 |
| 458926 | Feb 20, 1997 | Feb 20, 1997 | Cobra Oil & Gas Corporation | Glasscock | Calverley 28 #1 | 8,500 | 17332738 |
| 458159 | Feb 3, 1997 | Feb 3, 1997 | Cobra Oil & Gas Corporation | Glasscock | Calverley 29 #2 | 8,500 | 17332725 |
| 457903 | Jan 28, 1997 | Jan 28, 1997 | Cobra Oil & Gas Corporation | Howard | Hancock 18 #1 | 11,000 | 22735138 |
| 457903Amendment | Jan 28, 1997 | Jan 28, 1997 | Cobra Oil & Gas Corporation | Howard | Hancock 18 #1H | 11,000 | 22735138 |
| 457813 | Jan 24, 1997 | Jan 24, 1997 | Cobra Oil & Gas Corporation | Martin | Adams 38 #1 | 10,500 | 31734006 |
| 457043 | Jan 6, 1997 | Jan 6, 1997 | Cobra Oil & Gas Corporation | Howard | Blagrave 17 #1 | 11,000 | 22735130 |
| 456311 | Dec 13, 1996 | Dec 13, 1996 | Cobra Oil & Gas Corporation | Glasscock | Ratliff 20 #1 | 8,500 | 17332715 |
| 455362 | Nov 19, 1996 | Nov 19, 1996 | Cobra Oil & Gas Corporation | Glasscock | Schwartz 1 #1 | 8,000 | 17332709 |
| 454916 | Nov 7, 1996 | Nov 7, 1996 | Cobra Oil & Gas Corporation | Dawson | Richards 16 #1 | 12,500 | 11532933 |
| 454313 | Oct 24, 1996 | Oct 24, 1996 | Cobra Oil & Gas Corporation | Howard | Franklin 8 #1 | 11,000 | 22735084 |
| 453508 | Oct 7, 1996 | Oct 7, 1996 | Cobra Oil & Gas Corporation | Martin | Anderson Unit 11 #1 | 11,200 | 31734048 |
| 451302 | Sep 18, 1996 | Sep 18, 1996 | Cobra Oil & Gas Corporation | Glasscock | Kolb 12 #1 | 8,500 | 17332665 |
| 452709 | Sep 16, 1996 | Sep 16, 1996 | Cobra Oil & Gas Corporation | Glasscock | Calverley 29 #1 | 8,500 | 17332682 |
| 450624 | Aug 14, 1996 | Aug 14, 1996 | Cobra Oil & Gas Corporation | Howard | Sewell Unit #2 | 9,300 | 22735054 |
| 451445 | Aug 13, 1996 | Aug 13, 1996 | Cobra Oil & Gas Corporation | Martin | Phillips Unit #1 | 11,000 | 31734043 |
| 451068 | Aug 2, 1996 | Aug 2, 1996 | Cobra Oil & Gas Corporation | Dawson | Turner, Everett 2 #1 | 12,400 | 11532904 |
| 449883 | Jul 30, 1996 | Jul 30, 1996 | Cobra Oil & Gas Corporation | Howard | Guitar 13 #1 | 10,600 | 22735048 |
| 448812 | Jun 3, 1996 | Jun 3, 1996 | Cobra Oil & Gas Corporation | Howard | Quinn Unit 8 #1 | 11,000 | 22735040 |
| 448812Amendment | Jun 3, 1996 | Jun 3, 1996 | Cobra Oil & Gas Corporation | Howard | Quinn Unit 8 #1 | 11,000 | 22735040 |
| 446615 | Apr 3, 1996 | Apr 3, 1996 | Cobra Oil & Gas Corporation | Dawson | Turner 17 #2 | 12,500 | 11532889 |
| 445438 | Mar 1, 1996 | Mar 1, 1996 | Cobra Oil & Gas Corporation | Howard | Frazier 4 #1 | 10,000 | 22734895 |
| 442770 | Dec 12, 1995 | Dec 12, 1995 | Cobra Oil & Gas Corporation | Dawson | Welch 68 #1 | 12,500 | 11532882 |
| 442668 | Dec 11, 1995 | Dec 11, 1995 | Cobra Oil & Gas Corporation | Howard | Witherspoon 8 #1 | 11,000 | 22734975 |
| 442362 | Nov 30, 1995 | Nov 30, 1995 | Cobra Oil & Gas Corporation | Howard | Hamlin 5 #1 | 9,000 | 22734973 |
| 442309 | Nov 28, 1995 | Nov 28, 1995 | Cobra Oil & Gas Corporation | Pecos | Yates Heirs 71 #1 | 8,500 | 37136565 |
| 442309Amendment | Nov 28, 1995 | Nov 28, 1995 | Cobra Oil & Gas Corporation | Pecos | Yates Heirs 71 #1 | 8,500 | 37136565 |
| 442204 | Nov 22, 1995 | Nov 22, 1995 | Cobra Oil & Gas Corporation | Howard | Clara Adams Unit 37 #1 | 9,200 | 22734972 |
| 441881 | Nov 13, 1995 | Nov 13, 1995 | Cobra Oil & Gas Corporation | Howard | Homan Unit 45 #1 | 11,000 | 22734969 |
| 441438 | Oct 31, 1995 | Oct 31, 1995 | Cobra Oil & Gas Corporation | Howard | Frazier 4 #2 | 10,500 | 22734955 |
| 441120 | Oct 23, 1995 | Oct 23, 1995 | Cobra Oil & Gas Corporation | Howard | Wilkinson Unit 4 #1 | 10,600 | 22734952 |
| 440831 | Oct 12, 1995 | Oct 12, 1995 | Cobra Oil & Gas Corporation | Glasscock | Hilger 12 #1 | 8,500 | 17332572 |
| 440830 | Oct 12, 1995 | Oct 12, 1995 | Cobra Oil & Gas Corporation | Howard | Evans 3 #1 | 9,200 | 22734951 |
| 440542 | Oct 3, 1995 | Oct 3, 1995 | Cobra Oil & Gas Corporation | Dawson | Turner 17 #1 | 12,500 | 11532870 |
| 440334 | Sep 27, 1995 | Sep 27, 1995 | Cobra Oil & Gas Corporation | Upton | Usher 13 #1 | 13,000 | 46133575 |
| 440083 | Sep 20, 1995 | Sep 20, 1995 | Cobra Oil & Gas Corporation | Howard | Wilkinson 48 #1 | 10,600 | 22734941 |
| 440083Amendment | Sep 20, 1995 | Sep 20, 1995 | Cobra Oil & Gas Corporation | Howard | Wilkinson Unit 48 #1 | 10,600 | 22734941 |
| 438338 | Jul 31, 1995 | Jul 31, 1995 | Cobra Oil & Gas Corporation | Howard | McNew 28 #1 | 11,000 | 22734937 |
| 438337 | Jul 31, 1995 | Jul 31, 1995 | Cobra Oil & Gas Corporation | Glasscock | Midland National Bank 39 #1 | 11,300 | 17332542 |
| 437296 | Jul 20, 1995 | Jul 20, 1995 | Cobra Oil & Gas Corporation | Howard | TXL 5 #1 | 11,000 | 22734929 |
| 437363 | Jun 28, 1995 | Jun 28, 1995 | Cobra Oil & Gas Corporation | Martin | Heredia Unit 46 #1 | 11,000 | 31734012 |
| 437363Amendment | Jun 28, 1995 | Jun 28, 1995 | Cobra Oil & Gas Corporation | Martin | Heredia 46 Unit #1 | 11,000 | 31734012 |
| 437363Amendment | Jun 28, 1995 | Jun 28, 1995 | Cobra Oil & Gas Corporation | Martin | Heredia 46 Unit #1 | 11,000 | 31734012 |
| 436451 | Jun 1, 1995 | Jun 1, 1995 | Cobra Oil & Gas Corporation | Howard | Johnson 2 #1 | 11,000 | 22734925 |