| 653345 | Jan 25, 2008 | Jan 25, 2008 | EOG Resources, Inc. | Clements Unit #10HH | 10,000 | 25132539 |
| 653345Amendment | Jan 25, 2008 | Jan 25, 2008 | EOG Resources, Inc. | Clements Unit #10HH | 10,000 | 25132539 |
| 653316 | Jan 25, 2008 | Jan 25, 2008 | Burlington Resources O & G Co LP | Georges Creek Ranch #15HH | 9,000 | 25132538 |
| 653296 | Jan 25, 2008 | Jan 25, 2008 | Chesapeake Operating, Inc. | Hunter #A 2HH | 9,000 | 25132536 |
| 653296Amendment | Jan 25, 2008 | Jan 25, 2008 | Chesapeake Operating, Inc. | Hunter #A 2HH | 9,000 | 25132536 |
| 653284 | Jan 25, 2008 | Jan 25, 2008 | Chesapeake Operating, Inc. | Scott Trust #1HH | 9,000 | 25132535 |
| 653282 | Jan 25, 2008 | Jan 25, 2008 | Devon Energy Production Co, L.P. | Karen Shipley GU #2H | 9,000 | 25132534 |
| 651885Amendment | Jan 25, 2008 | Jan 25, 2008 | Devon Energy Production Co, L.P. | Brown, Nina #2HH | 9,000 | 25132487 |
| 653257 | Jan 24, 2008 | Jan 24, 2008 | EOG Resources, Inc. | Beil Unit #6HH | 10,000 | 25132533 |
| 653185 | Jan 24, 2008 | Jan 24, 2008 | Devon Energy Production Co, L.P. | William David #8HH | 9,000 | 25132532 |
| 653210 | Jan 23, 2008 | Jan 23, 2008 | North Texas Llano Operating Corp | Spring Valley #1HH | 9,000 | 25132531 |
| 653173 | Jan 23, 2008 | Jan 23, 2008 | Devon Energy Production Co, L.P. | Thomas, Joseph #3HH | 9,000 | 25132530 |
| 653132 | Jan 23, 2008 | Jan 23, 2008 | Chesapeake Operating, Inc. | Winscott #A 1HH | 9,000 | 25132529 |
| 653127 | Jan 23, 2008 | Jan 23, 2008 | Chesapeake Operating, Inc. | Kim #1HH | 9,000 | 25132528 |
| 652564 | Jan 23, 2008 | Jan 23, 2008 | Chesapeake Operating, Inc. | McMurry #1HH | 9,000 | 25132519 |
| 651359 | Jan 22, 2008 | Jan 22, 2008 | EOG Resources, Inc. | Tolbert Unit #6HH | 10,000 | 25132457 |
| 651349 | Jan 22, 2008 | Jan 22, 2008 | EOG Resources, Inc. | Tolbert Unit #4HH | 10,000 | 25132455 |
| 651341 | Jan 22, 2008 | Jan 22, 2008 | EOG Resources, Inc. | Tolbert Unit #3HH | 10,000 | 25132454 |
| 652483 | Jan 18, 2008 | Jan 18, 2008 | Sullivan, Hollis R. Inc. | Rice #1HH | 8,900 | 25132516 |
| 652483Amendment | Jan 18, 2008 | Jan 18, 2008 | XTO Energy Inc. | Rice #1HH | 12,750 | 25132516 |
| 652966 | Jan 17, 2008 | Jan 17, 2008 | Chesapeake Operating, Inc. | Martha #1HH | 9,000 | 25132526 |
| 652911 | Jan 17, 2008 | Jan 17, 2008 | EOG Resources, Inc. | Reynolds #4 | 10,000 | 25132527 |
| 652911Amendment | Jan 17, 2008 | Jan 17, 2008 | EOG Resources, Inc. | Reynolds #4HH | 10,000 | 25132527 |
| 652908 | Jan 17, 2008 | Jan 17, 2008 | EOG Resources, Inc. | Reynolds #3 | 10,000 | 25132525 |
| 652908Amendment | Jan 17, 2008 | Jan 17, 2008 | EOG Resources, Inc. | Reynolds #3HH | 10,000 | 25132525 |
| 652907 | Jan 17, 2008 | Jan 17, 2008 | EOG Resources, Inc. | Reynolds #2 | 10,000 | 25132524 |
| 652907Amendment | Jan 17, 2008 | Jan 17, 2008 | EOG Resources, Inc. | Reynolds #2HH | 10,000 | 25132524 |
| 652906 | Jan 17, 2008 | Jan 17, 2008 | EOG Resources, Inc. | Reynolds #1 | 10,000 | 25132523 |
| 652906Amendment | Jan 17, 2008 | Jan 17, 2008 | EOG Resources, Inc. | Reynolds #1HH | 10,000 | 25132523 |
| 652808 | Jan 16, 2008 | Jan 16, 2008 | Chesapeake Operating, Inc. | Hunter #A 3HH | 9,000 | 25132521 |
| 652808Amendment | Jan 16, 2008 | Jan 16, 2008 | Chesapeake Operating, Inc. | Hunter #A 3HH | 9,000 | 25132521 |
| 652659 | Jan 16, 2008 | Jan 16, 2008 | Chesapeake Operating, Inc. | Little Hoss 3 #Q 3HH | 9,000 | 25132520 |
| 652659Amendment | Jan 16, 2008 | Jan 16, 2008 | Chesapeake Operating, Inc. | Little Hoss 3 #Q 3HH | 9,000 | 25132520 |
| 652572 | Jan 14, 2008 | Jan 14, 2008 | Williams Prod. Gulf Coast, L.P. | Crouch Farm Unit #5HH | 7,600 | 25132518 |
| 652572Amendment | Jan 14, 2008 | Jan 14, 2008 | Williams Prod. Gulf Coast, L.P. | Crouch Farm Unit #5HH | 7,600 | 25132518 |
| 652532 | Jan 14, 2008 | Jan 14, 2008 | Chesapeake Operating, Inc. | Allison #1HH | 9,000 | 25132517 |
| 652532Amendment | Jan 14, 2008 | Jan 14, 2008 | Chesapeake Operating, Inc. | Allison #1HH | 9,000 | 25132517 |
| 652219 | Jan 14, 2008 | Jan 14, 2008 | XTO Energy Inc. | Harper Nej West #B 3BHH | 12,000 | 25132503 |
| 652219Amendment | Jan 14, 2008 | Jan 14, 2008 | XTO Energy Inc. | Harper Nej West #B 3BHH | 12,000 | 25132503 |
| 652398 | Jan 10, 2008 | Jan 10, 2008 | Chesapeake Operating, Inc. | Creed #2HH | 9,000 | 25132513 |
| 652388 | Jan 10, 2008 | Jan 10, 2008 | Chesapeake Operating, Inc. | Runnels #1HH | 9,000 | 25132512 |
| 652382 | Jan 10, 2008 | Jan 10, 2008 | Chesapeake Operating, Inc. | Stephens #3HH | 9,000 | 25132511 |
| 652357 | Jan 10, 2008 | Jan 10, 2008 | Devon Energy Production Co, L.P. | William David #5HH | 9,000 | 25132510 |
| 652357Amendment | Jan 10, 2008 | Jan 10, 2008 | Devon Energy Production Co, L.P. | William David #5HH | 9,000 | 25132510 |
| 652289 | Jan 10, 2008 | Jan 10, 2008 | Chesapeake Operating, Inc. | Petty #3HH | 9,000 | 25132507 |
| 652287 | Jan 10, 2008 | Jan 10, 2008 | Chesapeake Operating, Inc. | Petty #2HH | 9,000 | 25132506 |
| 652287Amendment | Jan 10, 2008 | Jan 10, 2008 | Chesapeake Operating, Inc. | Petty #2HH | 9,000 | 25132506 |
| 652062 | Jan 10, 2008 | Jan 10, 2008 | Chesapeake Operating, Inc. | Petty #1HH | 9,000 | 25132490 |
| 652062Amendment | Jan 10, 2008 | Jan 10, 2008 | Chesapeake Operating, Inc. | Petty #1HH | 9,000 | 25132490 |
| 652302 | Jan 9, 2008 | Jan 9, 2008 | Devon Energy Production Co, L.P. | Livingstone #2HH | 9,000 | 25132508 |
| 652281 | Jan 9, 2008 | Jan 9, 2008 | XTO Energy Inc. | Cow Pasture #1HH | 11,000 | 25132505 |
| 652281Amendment | Jan 9, 2008 | Jan 9, 2008 | XTO Energy Inc. | Cow Pasture #1HH | 11,000 | 25132505 |
| 652281Amendment | Jan 9, 2008 | Jan 9, 2008 | XTO Energy Inc. | Cow Pasture #1HH | 11,000 | 25132505 |
| 652257 | Jan 9, 2008 | Jan 9, 2008 | Chesapeake Operating, Inc. | Stepp #1HH | 9,000 | 25132504 |
| 652168 | Jan 8, 2008 | Jan 8, 2008 | Devon Energy Production Co, L.P. | Sue Mahaffey #10HH | 9,000 | 25132500 |
| 652168Amendment | Jan 8, 2008 | Jan 8, 2008 | Devon Energy Production Co, L.P. | Sue Mahaffey #10H | 9,000 | 25132500 |
| 652190 | Jan 7, 2008 | Jan 7, 2008 | Chesapeake Operating, Inc. | Upchurch #2HH | 9,000 | 25132502 |
| 652170 | Jan 7, 2008 | Jan 7, 2008 | Devon Energy Production Co, L.P. | Sue Mahaffey #12HH | 9,000 | 25132501 |
| 652133 | Jan 7, 2008 | Jan 7, 2008 | Chesapeake Operating, Inc. | Winscott #A 3HH | 9,000 | 25132496 |
| 652111 | Jan 7, 2008 | Jan 7, 2008 | Chesapeake Operating, Inc. | Little Hoss #O 1HH | 9,000 | 25132494 |
| 651997 | Jan 7, 2008 | Jan 7, 2008 | Williams Prod. Gulf Coast, L.P. | Crouch Farm Unit #4HH | 7,600 | 25132485 |
| 651997Amendment | Jan 7, 2008 | Jan 7, 2008 | Williams Prod. Gulf Coast, L.P. | Crouch Farm Unit #4HH | 7,600 | 25132485 |
| 651997Amendment | Jan 7, 2008 | Jan 7, 2008 | Williams Prod. Gulf Coast, L.P. | Crouch Farm Unit #4HH | 7,600 | 25132485 |
| 652113 | Jan 4, 2008 | Jan 4, 2008 | Chesapeake Operating, Inc. | Little Hoss #O 3HH | 9,000 | 25132495 |
| 652093 | Jan 4, 2008 | Jan 4, 2008 | Burlington Resources O & G Co LP | Schmidt Unit #4HH | 9,000 | 25132492 |
| 652071 | Jan 4, 2008 | Jan 4, 2008 | Devon Energy Production Co, L.P. | Burley Matthews #1HH | 9,000 | 25132493 |
| 652056 | Jan 4, 2008 | Jan 4, 2008 | Devon Energy Production Co, L.P. | Rive Enterprises #7HH | 9,000 | 25132491 |
| 652055 | Jan 4, 2008 | Jan 4, 2008 | Devon Energy Production Co, L.P. | Rive Enterprises #6HH | 9,000 | 25132488 |
| 652055Amendment | Jan 4, 2008 | Jan 4, 2008 | Devon Energy Production Co, L.P. | Rive Enterprises #6HH | 9,000 | 25132488 |
| 652045 | Jan 4, 2008 | Jan 4, 2008 | Devon Energy Production Co, L.P. | Sherry Stanford #1HH | 9,000 | 25132489 |
| 652045Amendment | Jan 4, 2008 | Jan 4, 2008 | Devon Energy Production Co, L.P. | Stanford, Sherry #1HH | 9,000 | 25132489 |
| 652045Amendment | Jan 4, 2008 | Jan 4, 2008 | XTO Energy Inc. | Sherry Stanford Unit #1HH | 9,000 | 25132489 |
| 652045Amendment | Jan 4, 2008 | Jan 4, 2008 | XTO Energy Inc. | Sherry Stanford Unit #1HH | 9,000 | 25132489 |
| 651960 | Jan 2, 2008 | Jan 2, 2008 | Sullivan, Hollis R. Inc. | Smith C #1HH | 8,900 | 25132484 |
| 651960Amendment | Jan 2, 2008 | Jan 2, 2008 | Sullivan, Hollis R. Inc. | Smith C #1HH | 8,900 | 25132484 |
| 651901 | Jan 2, 2008 | Jan 2, 2008 | Devon Energy Production Co, L.P. | Sue Mahaffey #11HH | 9,000 | 25132483 |
| 651823 | Jan 2, 2008 | Jan 2, 2008 | EOG Resources, Inc. | Maples Unit #10HH | 10,000 | 25132479 |
| 651757 | Jan 2, 2008 | Jan 2, 2008 | Chesapeake Operating, Inc. | Hawley a Unit #3HH | 9,000 | 25132499 |
| 651757Amendment | Jan 2, 2008 | Jan 2, 2008 | Chesapeake Operating, Inc. | Hawley a Unit #3HH | 9,000 | 25132499 |
| 651756 | Jan 2, 2008 | Jan 2, 2008 | Chesapeake Operating, Inc. | Hawley a Unit #2HH | 9,000 | 25132498 |
| 651756Amendment | Jan 2, 2008 | Jan 2, 2008 | Chesapeake Operating, Inc. | Hawley a Unit #2HH | 9,000 | 25132498 |
| 651755 | Jan 2, 2008 | Jan 2, 2008 | Chesapeake Operating, Inc. | Hawley a Unit #1HH | 9,000 | 25132497 |
| 650695Amendment | Jan 2, 2008 | Jan 2, 2008 | EOG Resources, Inc. | John F Clements #3HH | 10,000 | 25132418 |
| 651889 | Dec 31, 2007 | Dec 31, 2007 | Devon Energy Production Co, L.P. | Rive Enterprises #5HH | 9,000 | 25132482 |
| 651885 | Dec 31, 2007 | Dec 31, 2007 | Devon Energy Production Co, L.P. | Nina Brown #2HH | 9,000 | 25132487 |
| 651882 | Dec 31, 2007 | Dec 31, 2007 | Devon Energy Production Co, L.P. | Rive Enterprises #4HH | 9,000 | 25132481 |
| 651875 | Dec 31, 2007 | Dec 31, 2007 | Devon Energy Production Co, L.P. | Nina Brown #1HH | 9,000 | 25132486 |
| 651875Amendment | Dec 31, 2007 | Dec 31, 2007 | Devon Energy Production Co, L.P. | Brown, Nina #1HH | 9,000 | 25132486 |
| 651825 | Dec 28, 2007 | Dec 28, 2007 | EOG Resources, Inc. | Maples Unit #11 HH | 10,000 | 25132480 |
| 651777 | Dec 21, 2007 | Dec 21, 2007 | Chesapeake Operating, Inc. | Lowell #1HH | 9,000 | 25132478 |
| 651624 | Dec 21, 2007 | Dec 21, 2007 | EOG Resources, Inc. | Walking T Ranch Unit #19HH | 10,000 | 25132475 |
| 651413 | Dec 21, 2007 | Dec 21, 2007 | Chesapeake Operating, Inc. | Torres #2HH | 9,000 | 25132467 |
| 643400Amendment | Dec 21, 2007 | Dec 21, 2007 | XTO Energy Inc. | Hobson McCoy Young Unit #B 2HH | 11,000 | 25132114 |
| 651627 | Dec 20, 2007 | Dec 20, 2007 | EOG Resources, Inc. | Walking T Ranch Unit #20HH | 10,000 | 25132477 |
| 651621 | Dec 20, 2007 | Dec 20, 2007 | EOG Resources, Inc. | Walking T Ranch Unit #18HH | 10,000 | 25132474 |
| 651618 | Dec 20, 2007 | Dec 20, 2007 | EOG Resources, Inc. | Walking T Ranch Unit #17HH | 10,000 | 25132476 |
| 651617 | Dec 20, 2007 | Dec 20, 2007 | EOG Resources, Inc. | Walking T Ranch Unit #16HH | 10,000 | 25132473 |
| 651586 | Dec 20, 2007 | Dec 20, 2007 | EOG Resources, Inc. | Brice Unit #4HH | 10,000 | 25132472 |
| 651583 | Dec 20, 2007 | Dec 20, 2007 | EOG Resources, Inc. | Brice Unit #3HH | 10,000 | 25132471 |
| 651415 | Dec 20, 2007 | Dec 20, 2007 | Chesapeake Operating, Inc. | Torres #4HH | 9,000 | 25132465 |