| 504781 | Jan 31, 2001 | Jan 31, 2001 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Laurel, C. #11 | 8,650 | 42733327 |
| 503974 | Jan 11, 2001 | Jan 11, 2001 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Alvarez-Hinojosa Gas Unit #4 | 9,750 | 42733316 |
| 503666 | Jan 4, 2001 | Jan 4, 2001 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L & L Co. -C- #10 | 5,811 | 42732638 |
| 503302 | Dec 20, 2000 | Dec 20, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L&L -C- #7 | 8,800 | 42732465 |
| 503261 | Dec 19, 2000 | Dec 19, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Laurel, D. #11 | 8,568 | 42731354 |
| 502123 | Dec 19, 2000 | Dec 19, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Alvarez-Hinojosa Gas Unit #1 | 8,600 | 42732309 |
| 502846 | Dec 8, 2000 | Dec 8, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Laurel, C. #8 | 5,974 | 42731647 |
| 502499 | Nov 30, 2000 | Nov 30, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Frost National Bank -A- #6 | 7,200 | 42733300 |
| 502499Amendment | Nov 30, 2000 | Nov 30, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Frost National Bank -A- #6 | 7,200 | 42733300 |
| 502050 | Nov 16, 2000 | Nov 16, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Chapotal Land Co. -B- #23 | 9,500 | 42733294 |
| 501909 | Nov 13, 2000 | Nov 13, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Chambers | Oryx-Sun Fee #3 | 10,962 | 07132093 |
| 501335 | Oct 27, 2000 | Oct 27, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Stephens | Hill, J. W. #2 | 4,269 | 42935446 |
| 501283 | Oct 26, 2000 | Oct 26, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Stephens | Johnson, Fannie T. #1 | 4,452 | 42935452 |
| 501283Amendment | Oct 26, 2000 | Oct 26, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Stephens | Johnson, Fannie T. #1 | 4,452 | 42935452 |
| 501095 | Oct 23, 2000 | Oct 23, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Chambers | Jackson, Felix Etal #16 | 8,379 | 07102323 |
| 501045 | Oct 20, 2000 | Oct 20, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Chambers | Middleton, Archie #10 | 8,450 | 07102313 |
| 500783 | Oct 13, 2000 | Oct 13, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Kleberg | Canales, A. T. #89 | 10,500 | 27332267 |
| 500035 | Sep 25, 2000 | Sep 25, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Hall, J. F. State #24 | 8,420 | 42732766 |
| 499903 | Sep 21, 2000 | Sep 21, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Chambers | Jackson, Felix et Al #40 | 8,150 | 07102342 |
| 499638 | Sep 14, 2000 | Sep 14, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia, L & L -C- #8 | 5,637 | 42732500 |
| 499637 | Sep 14, 2000 | Sep 14, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L & L -C- #6 | 5,712 | 42732342 |
| 499243 | Sep 5, 2000 | Sep 5, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Frost National Bank -A- #5 | 6,600 | 42733266 |
| 499110 | Aug 31, 2000 | Aug 31, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Yturria L & L -C- #7 | 8,795 | 42732646 |
| 499109 | Aug 31, 2000 | Aug 31, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Stephens | Gilmore-Owen Unit #1H | 5,014 | 42935475 |
| 499069 | Aug 30, 2000 | Aug 30, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | De Garcia, B. G. #47 | 7,468 | 42732810 |
| 498584 | Aug 17, 2000 | Aug 17, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia, I. Y. #18 | 11,162 | 42732582 |
| 498386 | Aug 11, 2000 | Aug 11, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L&L Co. -C- #15 | 8,300 | 42733255 |
| 498386Amendment | Aug 11, 2000 | Aug 11, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L&L Co. -C- #15 | 8,300 | 42733255 |
| 498386Amendment | Aug 11, 2000 | Aug 11, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L&L Co. -C- #15 | 8,300 | 42733255 |
| 498385 | Aug 11, 2000 | Aug 11, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L&L Co. -C- #16 | 8,000 | 42733256 |
| 498385Amendment | Aug 11, 2000 | Aug 11, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L&L Co. -C- #16 | 8,000 | 42733256 |
| 497672 | Jul 27, 2000 | Jul 27, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | A. G. Hermann Gas Unit #5 | 7,600 | 42732864 |
| 497672Amendment | Jul 27, 2000 | Jul 27, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | A. G. Hermann Gas Unit #5 | 7,600 | 42732864 |
| 497338 | Jul 18, 2000 | Jul 18, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Hall, J. F. State #26 | 10,000 | 42733247 |
| 496462 | Jul 17, 2000 | Jul 17, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Hidalgo | Yturria L&C -B- #6 | 12,100 | 21532777 |
| 496967 | Jul 7, 2000 | Jul 7, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Chambers | Barrow, R. J. #17 | 10,180 | 07132079 |
| 496464 | Jun 22, 2000 | Jun 22, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Hidalgo | Garcia-Yturria -B- Gas Unit #1 | 13,300 | 21532778 |
| 496463 | Jun 22, 2000 | Jun 22, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia-Yturria Gas Unit #3 | 13,000 | 42733242 |
| 495400 | May 23, 2000 | May 23, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia, L & L Co. -C- #14 | 5,700 | 42733216 |
| 495400Amendment | May 23, 2000 | May 23, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L & L Co. -C- #14 | 5,600 | 42733216 |
| 494612 | May 1, 2000 | May 1, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L&L Co. -C- #11 | 4,890 | 42732643 |
| 494376 | Apr 28, 2000 | Apr 28, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Howard | Kloh #47 | 2,900 | 22735511 |
| 494268 | Apr 24, 2000 | Apr 24, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Howard | Kloh #58 | 2,900 | 22735507 |
| 494267 | Apr 24, 2000 | Apr 24, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Glasscock | Kloh #57 | 2,900 | 17333027 |
| 494266 | Apr 24, 2000 | Apr 24, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Glasscock | Kloh #56 | 2,900 | 17333026 |
| 494265 | Apr 24, 2000 | Apr 24, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Howard | Kloh #55 | 2,900 | 22735506 |
| 494264 | Apr 24, 2000 | Apr 24, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Glasscock | Kloh #54 | 2,900 | 17333025 |
| 494262 | Apr 24, 2000 | Apr 24, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Howard | Kloh #53 | 2,900 | 22735505 |
| 494167 | Apr 19, 2000 | Apr 19, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Glasscock | Kloh #52 | 2,900 | 17333024 |
| 494166 | Apr 19, 2000 | Apr 19, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Howard | Kloh #50 | 2,900 | 22735503 |
| 494164 | Apr 19, 2000 | Apr 19, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Howard | Kloh #51 | 2,900 | 22735502 |
| 493676 | Mar 31, 2000 | Mar 31, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Hall, C. M. -A- #11 | 10,000 | 42733224 |
| 492208 | Feb 17, 2000 | Feb 17, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Chambers | Kerr McGee Fee A #1 | 11,500 | 07132170 |
| 491262 | Jan 21, 2000 | Jan 21, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L & L "C" #14 | 5,700 | 42733216 |
| 491262Amendment | Jan 21, 2000 | Jan 21, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia L & L "C" #14 | 5,700 | 42733216 |
| 491181 | Jan 18, 2000 | Jan 18, 2000 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Yturria L & L Co. -B- #4 | 5,258 | 42732347 |
| 490546 | Dec 21, 1999 | Dec 21, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Speer, Geo. H. State -D- #6 | 10,000 | 42733211 |
| 490546Amendment | Dec 21, 1999 | Dec 21, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Speer, Geo. H. State -D- #6 | 10,000 | 42733211 |
| 490315 | Dec 13, 1999 | Dec 13, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | De Garcia, B. G. #39 | 8,852 | 42731910 |
| 489793 | Nov 23, 1999 | Nov 23, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Alvarez-Hinojosa Gas Unit #3 | 7,250 | 42732960 |
| 489728 | Nov 22, 1999 | Nov 22, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Orive, A. #9 | 7,945 | 42732975 |
| 489704 | Nov 19, 1999 | Nov 19, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Slick Estate -C- #15 | 9,500 | 42733208 |
| 489308 | Nov 9, 1999 | Nov 9, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | A. G. Hermann Gas Unit #5 | 7,600 | 42732864 |
| 489308Amendment | Nov 9, 1999 | Nov 9, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | A. G. Hermann Gas Unit #5 | 7,600 | 42732864 |
| 489296 | Nov 8, 1999 | Nov 8, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | A. G. Herman Gas Unit #1 | 5,005 | 42732021 |
| 488963 | Oct 28, 1999 | Oct 28, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | De Garcia, B. G. #44 | 8,172 | 42732345 |
| 488871 | Oct 26, 1999 | Oct 26, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | A. G. Hermann Gas Unit #4 | 8,305 | 42732527 |
| 488725 | Oct 21, 1999 | Oct 21, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Chambers | Seabreeze Land Company #16ST | 11,000 | 07132110 |
| 488475 | Oct 13, 1999 | Oct 13, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Kleberg | Canales, A. T. #85 | 9,438 | 27332227 |
| 488474 | Oct 13, 1999 | Oct 13, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Kleberg | Canales, A. T. #79 | 9,362 | 27332224 |
| 488060Amendment | Sep 29, 1999 | Sep 29, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Speer, George H. #22 | 7,650 | 42732353 |
| 486351Amendment | Aug 13, 1999 | Aug 13, 1999 | Kerr-McGee Oil & Gas Onshore LLC | Howard | Kloh #1 | 2,450 | 22702945 |
| 480085Amendment | Oct 12, 1998 | Oct 12, 1998 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia, I. Y. #23 | 12,900 | 42733135 |
| 478032Amendment | Jul 16, 1998 | Jul 16, 1998 | Kerr-McGee Oil & Gas Onshore LLC | Johnson | W. R. Lee et UX Gas Unit #1 | 7,080 | 25130108 |
| 472427Amendment | Jan 26, 1998 | Jan 26, 1998 | Kerr-McGee Oil & Gas Onshore LLC | Nolan | North Nena Lucia Unit #207 | 7,500 | 35332604 |
| 450594Amendment | Aug 14, 1996 | Aug 14, 1996 | Kerr-McGee Oil & Gas Onshore LLC | Hidalgo | Yturria L & C "B" #5 | 11,761 | 21532331 |
| 438194Amendment | Jul 25, 1995 | Jul 25, 1995 | Kerr-McGee Oil & Gas Onshore LLC | Starr | Garcia-Yturria Gas Unit #1 | 10,497 | 42732783 |