| 634742 | Mar 13, 2007 | Mar 13, 2007 | Devon Energy Production Co, L.P. | Barker-Simpson #2HH | 9,000 | 25131569 |
| 634742Amendment | Mar 13, 2007 | Mar 13, 2007 | Devon Energy Production Co, L.P. | Barker-Simpson #2HH | 9,000 | 25131569 |
| 634728 | Mar 13, 2007 | Mar 13, 2007 | Devon Energy Production Co, L.P. | Barker-Simpson #3HH | 9,000 | 25131568 |
| 634704 | Mar 13, 2007 | Mar 13, 2007 | Chesapeake Operating, Inc. | Jeter #1HH | 9,000 | 25131567 |
| 634562 | Mar 13, 2007 | Mar 13, 2007 | Chesapeake Operating, Inc. | Cedf #2HH | 9,000 | 25131562 |
| 633215 | Mar 12, 2007 | Mar 12, 2007 | EOG Resources, Inc. | Ezell Unit #3HH | 8,500 | 25131505 |
| 633213 | Mar 12, 2007 | Mar 12, 2007 | EOG Resources, Inc. | Ezell Unit #2HH | 8,500 | 25131506 |
| 633213Amendment | Mar 12, 2007 | Mar 12, 2007 | EOG Resources, Inc. | Ezell Unit #2HH | 10,000 | 25131506 |
| 634582 | Mar 9, 2007 | Mar 9, 2007 | Carrizo Oil & Gas, Inc. | Trinity Materials #2HH | 7,500 | 25131565 |
| 634561 | Mar 9, 2007 | Mar 9, 2007 | Chesapeake Operating, Inc. | Hyder #7HH | 9,000 | 25131564 |
| 634561Amendment | Mar 9, 2007 | Mar 9, 2007 | Chesapeake Operating, Inc. | Hyder #7HH | 9,000 | 25131564 |
| 634560 | Mar 9, 2007 | Mar 9, 2007 | Chesapeake Operating, Inc. | Hyder #6HH | 9,000 | 25131561 |
| 634560Amendment | Mar 9, 2007 | Mar 9, 2007 | Chesapeake Operating, Inc. | Hyder #6HH | 9,000 | 25131561 |
| 634559 | Mar 9, 2007 | Mar 9, 2007 | Chesapeake Operating, Inc. | Hyder #5HH | 9,000 | 25131563 |
| 634559Amendment | Mar 9, 2007 | Mar 9, 2007 | Chesapeake Operating, Inc. | Hyder #5HH | 9,000 | 25131563 |
| 634543 | Mar 9, 2007 | Mar 9, 2007 | EOG Resources, Inc. | Vella Hill Unit #2HH | 8,900 | 25131560 |
| 634531 | Mar 9, 2007 | Mar 9, 2007 | EOG Resources, Inc. | Holmes Unit #4HH | 8,000 | 25131559 |
| 634531Amendment | Mar 9, 2007 | Mar 9, 2007 | EOG Resources, Inc. | Holmes Unit #4HH | 8,100 | 25131559 |
| 634526 | Mar 9, 2007 | Mar 9, 2007 | EOG Resources, Inc. | Holmes Unit #3HH | 7,500 | 25131558 |
| 634526Amendment | Mar 9, 2007 | Mar 9, 2007 | EOG Resources, Inc. | Holmes Unit #3HH | 7,800 | 25131558 |
| 634524 | Mar 9, 2007 | Mar 9, 2007 | EOG Resources, Inc. | Flores Unit #1HH | 9,000 | 25131566 |
| 634524Amendment | Mar 9, 2007 | Mar 9, 2007 | EOG Resources, Inc. | Flores Unit #1HH | 10,000 | 25131566 |
| 634463 | Mar 8, 2007 | Mar 8, 2007 | XTO Energy Inc. | Sowell Unit #1HH | 12,000 | 25131555 |
| 634463Amendment | Mar 8, 2007 | Mar 8, 2007 | XTO Energy Inc. | Sowell Unit #1HH | 12,000 | 25131555 |
| 634379 | Mar 7, 2007 | Mar 7, 2007 | Devon Energy Production Co, L.P. | Howell, Charles #1HH | 9,000 | 25131556 |
| 634379Amendment | Mar 7, 2007 | Mar 7, 2007 | Devon Energy Production Co, L.P. | Howell, Charles #1HH | 9,000 | 25131556 |
| 634369 | Mar 7, 2007 | Mar 7, 2007 | Williams Prod. Gulf Coast, L.P. | Manis #1HH | 8,500 | 25131554 |
| 634367 | Mar 7, 2007 | Mar 7, 2007 | Devon Energy Production Co, L.P. | Howell, Charles #2HH | 9,000 | 25131553 |
| 634367Amendment | Mar 7, 2007 | Mar 7, 2007 | Devon Energy Production Co, L.P. | Howell, Charles #2HH | 9,000 | 25131553 |
| 634312 | Mar 7, 2007 | Mar 7, 2007 | Devon Energy Production Co, L.P. | Charles Howell #3HH | 9,000 | 25131552 |
| 634292 | Mar 7, 2007 | Mar 7, 2007 | Chesapeake Operating, Inc. | Clear Creek #5HH | 9,000 | 25131551 |
| 634292Amendment | Mar 7, 2007 | Mar 7, 2007 | Chesapeake Operating, Inc. | Clear Creek #5HH | 9,000 | 25131551 |
| 634289 | Mar 6, 2007 | Mar 6, 2007 | Chesapeake Operating, Inc. | Clear Creek #1HH | 9,000 | 25131550 |
| 634226 | Mar 6, 2007 | Mar 6, 2007 | Chesapeake Operating, Inc. | Tucker #5HH | 9,000 | 25131547 |
| 633182 | Mar 6, 2007 | Mar 6, 2007 | EOG Resources, Inc. | Barron Unit #5HH | 9,000 | 25131527 |
| 631989Amendment | Mar 6, 2007 | Mar 6, 2007 | EOG Resources, Inc. | Mercer Unit #1HH | 7,000 | 25131447 |
| 631989Amendment | Mar 6, 2007 | Mar 6, 2007 | EOG Resources, Inc. | Mercer Unit #1HH | 7,500 | 25131447 |
| 634229 | Mar 5, 2007 | Mar 5, 2007 | EOG Resources, Inc. | Rayburn Unit #8HH | 8,900 | 25131549 |
| 633180 | Mar 5, 2007 | Mar 5, 2007 | EOG Resources, Inc. | Barron Unit #4HH | 9,000 | 25131526 |
| 634228 | Mar 2, 2007 | Mar 2, 2007 | EOG Resources, Inc. | Rayburn Unit #7HH | 8,900 | 25131548 |
| 634152 | Mar 2, 2007 | Mar 2, 2007 | Williams Prod. Gulf Coast, L.P. | Dozier #1HH | 8,000 | 25131545 |
| 634152Amendment | Mar 2, 2007 | Mar 2, 2007 | Williams Prod. Gulf Coast, L.P. | Dozier #1HH | 8,000 | 25131545 |
| 634120 | Mar 1, 2007 | Mar 1, 2007 | North Texas Llano Operating Corp | Petty #1HH | 8,000 | 25131544 |
| 634120Amendment | Mar 1, 2007 | Mar 1, 2007 | North Texas Llano Operating Corp | Petty #1HH | 8,000 | 25131544 |
| 633476 | Mar 1, 2007 | Mar 1, 2007 | EOG Resources, Inc. | Vella Hill Unit #1HH | 8,900 | 25131519 |
| 632962 | Mar 1, 2007 | Mar 1, 2007 | EOG Resources, Inc. | Bransom Unit #2HH | 7,500 | 25131503 |
| 632962Amendment | Mar 1, 2007 | Mar 1, 2007 | EOG Resources, Inc. | Bransom Unit #2HH | 10,000 | 25131503 |
| 634048 | Feb 28, 2007 | Feb 28, 2007 | North Texas Llano Operating Corp | Saldena #1H | 8,000 | 25131543 |
| 634048Amendment | Feb 28, 2007 | Feb 28, 2007 | North Texas Llano Operating Corp | Saldena #1H | 12,000 | 25131543 |
| 633944 | Feb 28, 2007 | Feb 28, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #9HH | 9,000 | 25131546 |
| 631261 | Feb 27, 2007 | Feb 27, 2007 | XTO Energy Inc. | Gafford Unit #B 1HH | 12,000 | 25131412 |
| 631261Amendment | Feb 27, 2007 | Feb 27, 2007 | XTO Energy Inc. | Gafford Unit #B 1HH | 12,000 | 25131412 |
| 633929 | Feb 26, 2007 | Feb 26, 2007 | EOG Resources, Inc. | Double Diamond Unit #7HH | 7,500 | 25131541 |
| 633877 | Feb 26, 2007 | Feb 26, 2007 | Devon Energy Production Co, L.P. | Rose Children's Trust #4H | 9,000 | 25131540 |
| 633877Amendment | Feb 26, 2007 | Feb 26, 2007 | Devon Energy Production Co, L.P. | Rose Children's Trust #4H | 9,000 | 25131540 |
| 633876 | Feb 26, 2007 | Feb 26, 2007 | Devon Energy Production Co, L.P. | Rose Children's Trust #3H | 9,000 | 25131539 |
| 632367 | Feb 26, 2007 | Feb 26, 2007 | EOG Resources, Inc. | Maples Unit #2HH | 8,500 | 25131464 |
| 632367Amendment | Feb 26, 2007 | Feb 26, 2007 | EOG Resources, Inc. | Maples Unit #2HH | 8,500 | 25131464 |
| 633851 | Feb 23, 2007 | Feb 23, 2007 | EOG Resources, Inc. | Robinson #1HH | 8,500 | 25131538 |
| 633732 | Feb 22, 2007 | Feb 22, 2007 | Devon Energy Production Co, L.P. | Bob West #7HH | 9,000 | 25131537 |
| 633706 | Feb 22, 2007 | Feb 22, 2007 | Aspect Energy, LLC | Davis #1HH | 9,000 | 25131536 |
| 633686 | Feb 22, 2007 | Feb 22, 2007 | EOG Resources, Inc. | Acu Unit #5HH | 7,000 | 25131535 |
| 633686Amendment | Feb 22, 2007 | Feb 22, 2007 | EOG Resources, Inc. | Acu Unit #5HH | 7,000 | 25131535 |
| 633671 | Feb 21, 2007 | Feb 21, 2007 | EOG Resources, Inc. | Acu Unit #4HH | 7,000 | 25131533 |
| 633671Amendment | Feb 21, 2007 | Feb 21, 2007 | EOG Resources, Inc. | Acu Unit #4HH | 7,000 | 25131533 |
| 633666 | Feb 21, 2007 | Feb 21, 2007 | EOG Resources, Inc. | Bowerman "a" Unit #1HH | 7,500 | 25131534 |
| 633666Amendment | Feb 21, 2007 | Feb 21, 2007 | EOG Resources, Inc. | Bowerman "a" Unit #1HH | 7,500 | 25131534 |
| 633630 | Feb 20, 2007 | Feb 20, 2007 | EOG Resources, Inc. | Acu Unit #3HH | 7,000 | 25131531 |
| 633629 | Feb 20, 2007 | Feb 20, 2007 | EOG Resources, Inc. | Acu Unit #2HH | 7,000 | 25131532 |
| 633610 | Feb 16, 2007 | Feb 16, 2007 | Devon Energy Production Co, L.P. | Hes #1HH | 9,000 | 25131530 |
| 633580 | Feb 16, 2007 | Feb 16, 2007 | Devon Energy Production Co, L.P. | LBR Family Partnership #3HH | 9,000 | 25131529 |
| 633562 | Feb 16, 2007 | Feb 16, 2007 | J-W Operating Co. | Ford, Lorenzo #1HH | 15,000 | 25131528 |
| 633538 | Feb 15, 2007 | Feb 15, 2007 | Chesapeake Operating, Inc. | Mayfly Emerger #9HH | 9,000 | 25131523 |
| 633538Amendment | Feb 15, 2007 | Feb 15, 2007 | Chesapeake Operating, Inc. | Mayfly Emerger #9HH | 9,000 | 25131523 |
| 633513 | Feb 15, 2007 | Feb 15, 2007 | Devon Energy Production Co, L.P. | West, Bob #5HH | 9,000 | 25131522 |
| 633504 | Feb 15, 2007 | Feb 15, 2007 | Devon Energy Production Co, L.P. | Percifield, Doris #1H | 9,000 | 25131521 |
| 633484 | Feb 15, 2007 | Feb 15, 2007 | Range Production Company | Segerstrom #3HH | 8,000 | 25131520 |
| 633479 | Feb 15, 2007 | Feb 15, 2007 | Devon Energy Production Co, L.P. | Harris Family LP #1HH | 9,000 | 25131525 |
| 633467 | Feb 15, 2007 | Feb 15, 2007 | Chesapeake Operating, Inc. | Burton #5HH | 9,000 | 25131524 |
| 633466 | Feb 14, 2007 | Feb 14, 2007 | Chesapeake Operating, Inc. | Burton #4HH | 9,000 | 25131518 |
| 633463 | Feb 14, 2007 | Feb 14, 2007 | Chesapeake Operating, Inc. | Burton #3HH | 9,000 | 25131517 |
| 633434 | Feb 14, 2007 | Feb 14, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #3HH | 9,000 | 25131516 |
| 633431 | Feb 14, 2007 | Feb 14, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #1HH | 9,000 | 25131515 |
| 633356 | Feb 13, 2007 | Feb 13, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #E 3HH | 9,000 | 25131514 |
| 633356Amendment | Feb 13, 2007 | Feb 13, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #E 3HH | 9,000 | 25131514 |
| 633332 | Feb 13, 2007 | Feb 13, 2007 | Chesapeake Operating, Inc. | Mayfly Emerger #8HH | 9,000 | 25131513 |
| 633332Amendment | Feb 13, 2007 | Feb 13, 2007 | Chesapeake Operating, Inc. | Mayfly Emerger #8HH | 9,000 | 25131513 |
| 633332Amendment | Feb 13, 2007 | Feb 13, 2007 | Chesapeake Operating, Inc. | Mayfly Emerger #8HH | 9,000 | 25131513 |
| 633327 | Feb 13, 2007 | Feb 13, 2007 | Chesapeake Operating, Inc. | Mayfly Emerger #6HH | 9,000 | 25131512 |
| 633327Amendment | Feb 13, 2007 | Feb 13, 2007 | Chesapeake Operating, Inc. | Mayfly Emerger #6HH | 9,000 | 25131512 |
| 633316 | Feb 12, 2007 | Feb 12, 2007 | Devon Energy Production Co, L.P. | West, Bob #6HH | 9,000 | 25131511 |
| 633310 | Feb 12, 2007 | Feb 12, 2007 | Chesapeake Operating, Inc. | Hidden Creek #4HH | 9,000 | 25131510 |
| 633267 | Feb 10, 2007 | Feb 10, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #E 4HH | 9,000 | 25131509 |
| 633267Amendment | Feb 10, 2007 | Feb 10, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #E 4HH | 9,000 | 25131509 |
| 633260 | Feb 10, 2007 | Feb 10, 2007 | XTO Energy Inc. | Sau #1HH | 12,000 | 25131508 |
| 633260Amendment | Feb 10, 2007 | Feb 10, 2007 | XTO Energy Inc. | Sau Unit #1HH | 12,000 | 25131508 |
| 633232 | Feb 10, 2007 | Feb 10, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #E 2HH | 9,000 | 25131507 |
| 633232Amendment | Feb 10, 2007 | Feb 10, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #E 2HH | 9,000 | 25131507 |
| 633205 | Feb 10, 2007 | Feb 10, 2007 | Devon Energy Production Co, L.P. | Rayburne Family #1 | 9,000 | 25131502 |
| 633139 | Feb 10, 2007 | Feb 10, 2007 | EOG Resources, Inc. | Rayburn Unit #6HH | 8,800 | 25131504 |