| acquired | 560438 | 42-479-33244 | RECLASS | PETTY RANCH | WEBB | 2005-04-15 | from: BLACKBRUSH O & G, INC. |
| divested | 554860 | 42-479-38943 | DRILL | GATES RANCH "Y" | WEBB | 2004-12-27 | to: ROSETTA RESOURCES OPERATING LP |
| divested | 554847 | 42-479-38744 | RECOMP | PETTY RANCH | WEBB | 2004-12-16 | to: ST. MARY LAND & EXPLORATION CO. |
| divested | 554268 | 42-479-38930 | DRILL | GATES RANCH "Y" | WEBB | 2004-12-06 | to: ROSETTA RESOURCES OPERATING LP |
| divested | 554266 | 42-127-33258 | DRILL | BRISCOE RANCH | DIMMIT | 2004-12-06 | to: ROSETTA RESOURCES OPERATING LP |
| divested | 553292 | 42-479-38913 | DRILL | GATES RANCH "Y" | WEBB | 2004-11-12 | to: ROSETTA RESOURCES OPERATING LP |
| divested | 553143 | 42-127-33255 | DRILL | BRISCOE RANCH | DIMMIT | 2004-11-03 | to: ROSETTA RESOURCES OPERATING LP |
| divested | 553119 | 42-479-38909 | DRILL | BRASK RANCH | WEBB | 2004-11-03 | to: PROLINE ENERGY RESOURCES INC |
| divested | 552870 | 42-479-38905 | DRILL | PETTY RANCH | WEBB | 2004-10-29 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 551617 | 42-479-38872 | DRILL | PETTY RANCH | WEBB | 2004-09-30 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 551607 | 42-479-38871 | DRILL | PETTY RANCH | WEBB | 2004-09-29 | to: ST. MARY LAND & EXPLORATION CO. |
| divested | 551355 | 42-479-38862 | DRILL | PETTY RANCH | WEBB | 2004-09-22 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 551339 | 42-479-38861 | DRILL | PETTY RANCH | WEBB | 2004-09-22 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 550709 | 42-479-38849 | DRILL | PETTY RANCH | WEBB | 2004-09-09 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 550535 | 42-479-38846 | DRILL | PETTY RANCH | WEBB | 2004-09-09 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 550578 | 42-479-38847 | DRILL | PETTY RANCH | WEBB | 2004-09-08 | to: KERNS O & G INC. |
| divested | 549985 | 42-479-38832 | DRILL | GATES RANCH "Y" | WEBB | 2004-08-25 | to: ROSETTA RESOURCES OPERATING LP |
| divested | 549917 | 42-283-31843 | DRILL | E. ALDERMAN | LA SALLE | 2004-08-24 | to: KERNS O & G INC. |
| divested | 547572 | 42-479-38780 | DRILL | BRASK RANCH | WEBB | 2004-07-08 | to: PROLINE ENERGY RESOURCES INC |
| divested | 547327 | 42-479-38222 | RECLASS | BRASK STATE 1846 | WEBB | 2004-06-23 | to: PROLINE ENERGY RESOURCES INC |
| divested | 547143 | 42-479-38769 | DRILL | BRASK RANCH | WEBB | 2004-06-21 | to: PROLINE ENERGY RESOURCES INC |
| divested | 546231 | 42-479-38744 | DRILL | PETTY RANCH | WEBB | 2004-06-10 | to: ST. MARY LAND & EXPLORATION CO. |
| divested | 545635 | 42-479-38723 | DRILL | PETTY RANCH | WEBB | 2004-05-14 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 545432 | 42-479-38716 | DRILL | PETTY RANCH | WEBB | 2004-05-12 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 544467 | 42-479-38689 | DRILL | PETTY RANCH | WEBB | 2004-04-15 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 538133 | 42-479-37226 | RECOMP | PETTY RANCH | WEBB | 2003-11-03 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 537490 | 42-479-37362 | RECOMP | PETTY RANCH | WEBB | 2003-10-15 | to: ST. MARY LAND & EXPLORATION CO. |
| divested | 537232 | 42-479-38531 | DRILL | PETTY RANCH | WEBB | 2003-10-08 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 537159 | 42-479-38530 | DRILL | PETTY RANCH | WEBB | 2003-10-07 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 536700 | 42-479-38522 | DRILL | GATES RANCH "Y" | WEBB | 2003-09-25 | to: ROSETTA RESOURCES OPERATING LP |
| divested | 534041 | 42-479-38472 | DRILL | PETTY RANCH | WEBB | 2003-07-11 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 532956 | 42-479-38447 | DRILL | BRASK RANCH | WEBB | 2003-06-11 | to: PROLINE ENERGY RESOURCES INC |
| divested | 532790 | 42-479-38440 | DRILL | BRASK STATE 1840 | WEBB | 2003-06-06 | to: PROLINE ENERGY RESOURCES INC |
| divested | 532495 | 42-479-38435 | DRILL | BRASK RANCH | WEBB | 2003-05-29 | to: PROLINE ENERGY RESOURCES INC |
| divested | 531648 | 42-479-38418 | DRILL | BRASK RANCH | WEBB | 2003-05-07 | to: KERNS O & G INC. |
| divested | 531236 | 42-479-38407 | DRILL | BRASK RANCH | WEBB | 2003-04-28 | to: PROLINE ENERGY RESOURCES INC |
| filed | 530892 | 42-479-33267 | RECLASS | PETTY, O.S. | WEBB | 2003-04-21 | — |
| divested | 530205 | 42-479-38382 | DRILL | BRASK RANCH | WEBB | 2003-04-02 | to: PROLINE ENERGY RESOURCES INC |
| divested | 530017 | 42-479-38375 | DRILL | GATES RANCH "Y" | WEBB | 2003-03-27 | to: ROSETTA RESOURCES OPERATING LP |
| divested | 528532 | 42-479-38335 | DRILL | BRASK STATE 1846 | WEBB | 2003-02-19 | to: PROLINE ENERGY RESOURCES INC |
| divested | 528097 | 42-479-38320 | DRILL | BRASK STATE 1840S | WEBB | 2003-02-05 | to: PROLINE ENERGY RESOURCES INC |
| divested | 526736 | 42-479-38288 | DRILL | BRASK STATE UNIT | WEBB | 2002-12-30 | to: PROLINE ENERGY RESOURCES INC |
| divested | 526070 | 42-479-38277 | DRILL | BRASK STATE 1846 | WEBB | 2002-12-05 | to: PROLINE ENERGY RESOURCES INC |
| divested | 525639 | 42-479-38265 | DRILL | BRASK STATE 1840S | WEBB | 2002-11-19 | to: PROLINE ENERGY RESOURCES INC |
| divested | 525376 | 42-479-38261 | DRILL | BRASK STATE 1840 | WEBB | 2002-11-13 | to: PROLINE ENERGY RESOURCES INC |
| divested | 525257 | 42-479-38257 | DRILL | GATES RANCH "Y" | WEBB | 2002-11-06 | to: ROSETTA RESOURCES OPERATING LP |
| divested | 525106 | 42-479-38245 | DRILL | BRASK RANCH | WEBB | 2002-10-31 | to: PROLINE ENERGY RESOURCES INC |
| divested | 524699 | 42-479-38237 | DRILL | PETTY RANCH | WEBB | 2002-10-18 | to: WHITE OAK OPERATING COMPANY LLC |
| divested | 524699 | 42-479-38237 | DRILL | PETTY RANCH | WEBB | 2002-10-18 | to: WHITE OAK OPERATING COMPANY LLC |
| filed | 524543 | 42-479-33267 | RECLASS | PETTY, O.S. | WEBB | 2002-10-11 | — |