| 660395 | May 8, 2008 | May 8, 2008 | EOG Resources, Inc. | Bentley Unit #2HH | 10,000 | 21730612 |
| 660365 | May 8, 2008 | May 8, 2008 | EOG Resources, Inc. | McKown Unit #1HH | 10,000 | 21730611 |
| 660154 | May 7, 2008 | May 7, 2008 | Aspect Energy, LLC | Gerik Trust #2HH | 10,000 | 21730610 |
| 659825 | Apr 30, 2008 | Apr 30, 2008 | EOG Resources, Inc. | Paul Johnson Unit #1HH | 10,000 | 21730609 |
| 659791 | Apr 29, 2008 | Apr 29, 2008 | EOG Resources, Inc. | Newton Unit #1HH | 10,000 | 21730608 |
| 659443 | Apr 28, 2008 | Apr 28, 2008 | EOG Resources, Inc. | Sulak Unit #1HH | 10,000 | 21730606 |
| 659443Amendment | Apr 28, 2008 | Apr 28, 2008 | EOG Resources, Inc. | Sulak Unit #1HH | 10,000 | 21730606 |
| 659470 | Apr 26, 2008 | Apr 26, 2008 | EOG Resources, Inc. | Ron James Unit #1HH | 10,000 | 21730607 |
| 659406 | Apr 26, 2008 | Apr 26, 2008 | Quicksilver Resources Inc. | Shelby North #1HH | 9,000 | 21730605 |
| 659406Amendment | Apr 26, 2008 | Apr 26, 2008 | Quicksilver Resources Inc. | Shelby North #1HH | 9,000 | 21730605 |
| 659169 | Apr 24, 2008 | Apr 24, 2008 | Range Production Company | Tower Unit #1HH | 9,000 | 21730604 |
| 659107 | Apr 23, 2008 | Apr 23, 2008 | Range Production Company | Windmill #1HH | 9,000 | 21730603 |
| 658932 | Apr 21, 2008 | Apr 21, 2008 | Forest Oil Corporation | Pinner #1HH | 11,500 | 21730602 |
| 658931 | Apr 21, 2008 | Apr 21, 2008 | Forest Oil Corporation | Gus Jones #2HH | 11,500 | 21730601 |
| 658513 | Apr 16, 2008 | Apr 16, 2008 | Cornerstone E & P Company, LP | Gonzales Unit #2HH | 8,945 | 21730593 |
| 658760 | Apr 15, 2008 | Apr 15, 2008 | Quicksilver Resources Inc. | Norris Unit #4HH | 9,000 | 21730600 |
| 658757 | Apr 15, 2008 | Apr 15, 2008 | Quicksilver Resources Inc. | Norris Unit #3HH | 9,000 | 21730599 |
| 658756 | Apr 15, 2008 | Apr 15, 2008 | Quicksilver Resources Inc. | Norris Unit #2HH | 9,000 | 21730598 |
| 658743 | Apr 15, 2008 | Apr 15, 2008 | Quicksilver Resources Inc. | Norris Unit #1HH | 9,000 | 21730596 |
| 658740 | Apr 15, 2008 | Apr 15, 2008 | Quicksilver Resources Inc. | Norris Unit #7HH | 9,000 | 21730597 |
| 658737 | Apr 15, 2008 | Apr 15, 2008 | Quicksilver Resources Inc. | Norris Unit #5HH | 9,000 | 21730595 |
| 658733 | Apr 15, 2008 | Apr 15, 2008 | Quicksilver Resources Inc. | Norris Unit #6HH | 9,000 | 21730594 |
| 658561 | Apr 12, 2008 | Apr 12, 2008 | EOG Resources, Inc. | McMullin Unit #1HH | 10,000 | 21730592 |
| 657908 | Apr 7, 2008 | Apr 7, 2008 | Forest Oil Corporation | Gus Jones #1HH | 11,500 | 21730591 |
| 657913 | Apr 4, 2008 | Apr 4, 2008 | Quicksilver Resources Inc. | Dudley Farms Unit #2HH | 6,600 | 21730590 |
| 657735 | Apr 2, 2008 | Apr 2, 2008 | Quicksilver Resources Inc. | Peugh Unit #3HH | 6,600 | 21730589 |
| 657733 | Apr 2, 2008 | Apr 2, 2008 | Quicksilver Resources Inc. | Peugh Unit #2HH | 6,600 | 21730587 |
| 657732 | Apr 2, 2008 | Apr 2, 2008 | Quicksilver Resources Inc. | Peugh Unit #1HH | 6,600 | 21730588 |
| 657732Amendment | Apr 2, 2008 | Apr 2, 2008 | Quicksilver Resources Inc. | Peugh Unit #1HH | 8,000 | 21730588 |
| 656760 | Mar 27, 2008 | Mar 27, 2008 | Devon Energy Production Co, L.P. | James Conn IV #1HH | 9,000 | 21730576 |
| 656885 | Mar 24, 2008 | Mar 24, 2008 | EOG Resources, Inc. | Sutton Unit #1HH | 10,000 | 21730579 |
| 657097 | Mar 21, 2008 | Mar 21, 2008 | EOG Resources, Inc. | Cole Unit #1HH | 10,000 | 21730586 |
| 657072 | Mar 21, 2008 | Mar 21, 2008 | Quicksilver Resources Inc. | Dudley Farms Unit #1HH | 6,600 | 21730584 |
| 656973 | Mar 21, 2008 | Mar 21, 2008 | Cornerstone E & P Company, LP | Gonzalez #1HH | 8,945 | 21730581 |
| 656973Amendment | Mar 21, 2008 | Mar 21, 2008 | Cornerstone E & P Company, LP | Gonzales Unit #1HH | 8,945 | 21730581 |
| 656880 | Mar 21, 2008 | Mar 21, 2008 | EOG Resources, Inc. | Patricia Unit #1HH | 10,000 | 21730578 |
| 656892 | Mar 19, 2008 | Mar 19, 2008 | EOG Resources, Inc. | Steele Unit #1HH | 10,000 | 21730580 |
| 656764 | Mar 14, 2008 | Mar 14, 2008 | Devon Energy Production Co, L.P. | James Conn IV #2HH | 9,000 | 21730577 |
| 656625 | Mar 13, 2008 | Mar 13, 2008 | EOG Resources, Inc. | Cordell Unit #1HH | 10,000 | 21730575 |
| 656377 | Mar 10, 2008 | Mar 10, 2008 | EOG Resources, Inc. | Terrell Unit #1HH | 10,000 | 21730574 |
| 656305 | Mar 7, 2008 | Mar 7, 2008 | Quicksilver Resources Inc. | Gray-Griffin Unit #1HH | 6,600 | 21730573 |
| 656305Amendment | Mar 7, 2008 | Mar 7, 2008 | Quicksilver Resources Inc. | Gray-Griffin Unit #1HH | 8,000 | 21730573 |
| 655992 | Mar 4, 2008 | Mar 4, 2008 | EOG Resources, Inc. | Grace #2HH | 10,000 | 21730572 |
| 655412 | Feb 25, 2008 | Feb 25, 2008 | EOG Resources, Inc. | Taylor Unit #1HH | 10,000 | 21730571 |
| 655315 | Feb 25, 2008 | Feb 25, 2008 | EOG Resources, Inc. | Paxton Unit #1HH | 10,000 | 21730570 |
| 654892 | Feb 15, 2008 | Feb 15, 2008 | EOG Resources, Inc. | Ripley Unit #2HH | 10,000 | 21730569 |
| 651576 | Feb 14, 2008 | Feb 14, 2008 | EOG Resources, Inc. | Alma Unit #1HH | 10,000 | 21730536 |
| 651576Amendment | Feb 14, 2008 | Feb 14, 2008 | EOG Resources, Inc. | Alma Unit #1HH | 8,999 | 21730536 |
| 654595 | Feb 13, 2008 | Feb 13, 2008 | Cornerstone E & P Company, LP | Smithey #2HH | 8,400 | 21730568 |
| 654595Amendment | Feb 13, 2008 | Feb 13, 2008 | Cornerstone E & P Company, LP | Smithey #2HH | 8,400 | 21730568 |
| 654250 | Feb 7, 2008 | Feb 7, 2008 | Quicksilver Resources Inc. | Milquetoast Unit #1HH | 6,600 | 21730567 |
| 654250Amendment | Feb 7, 2008 | Feb 7, 2008 | Quicksilver Resources Inc. | Milquetoast Unit #1HH | 8,000 | 21730567 |
| 654145 | Feb 7, 2008 | Feb 7, 2008 | Range Production Company | Clyde Nowlin #2HH | 8,500 | 21730566 |
| 654143 | Feb 7, 2008 | Feb 7, 2008 | Range Production Company | Clyde Nowlin #1HH | 8,500 | 21730565 |
| 654067 | Feb 6, 2008 | Feb 6, 2008 | Forest Oil Corporation | Cornerstone #1HH | 11,500 | 21730563 |
| 654062 | Feb 6, 2008 | Feb 6, 2008 | Forest Oil Corporation | Cornerstone #3HH | 11,500 | 21730564 |
| 653975 | Feb 5, 2008 | Feb 5, 2008 | Quicksilver Resources Inc. | McPherson #4HH | 6,600 | 21730561 |
| 653955 | Feb 5, 2008 | Feb 5, 2008 | EOG Resources, Inc. | Bentley Unit #1HH | 10,000 | 21730560 |
| 653977 | Feb 4, 2008 | Feb 4, 2008 | EOG Resources, Inc. | Gertrude Unit #1HH | 10,000 | 21730562 |
| 653977Amendment | Feb 4, 2008 | Feb 4, 2008 | EOG Resources, Inc. | Gertrude Unit #1HH | 10,000 | 21730562 |
| 653573 | Jan 30, 2008 | Jan 30, 2008 | Range Production Company | John Sawyer #3HH | 8,500 | 21730559 |
| 653572 | Jan 30, 2008 | Jan 30, 2008 | Range Production Company | John Sawyer #2HH | 8,500 | 21730558 |
| 653565 | Jan 30, 2008 | Jan 30, 2008 | Range Production Company | John Sawyer #1HH | 8,500 | 21730557 |
| 653491 | Jan 29, 2008 | Jan 29, 2008 | EOG Resources, Inc. | Ripley Unit #1HH | 10,000 | 21730555 |
| 653285 | Jan 25, 2008 | Jan 25, 2008 | EOG Resources, Inc. | Tekell Unit #1HH | 10,000 | 21730554 |
| 653263 | Jan 25, 2008 | Jan 25, 2008 | Cornerstone E & P Company, LP | Boswell #1HH | 9,700 | 21730553 |
| 653137 | Jan 23, 2008 | Jan 23, 2008 | EOG Resources, Inc. | Box Unit #1HH | 10,000 | 21730552 |
| 653137Amendment | Jan 23, 2008 | Jan 23, 2008 | EOG Resources, Inc. | Box Unit #1HH | 10,000 | 21730552 |
| 653134 | Jan 23, 2008 | Jan 23, 2008 | EOG Resources, Inc. | Baccus Unit #1HH | 10,000 | 21730551 |
| 652472 | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward #5HH | 7,000 | 21730550 |
| 652472Amendment | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward Unit #5HH | 6,600 | 21730550 |
| 652472Amendment | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward Unit #5HH | 9,000 | 21730550 |
| 652471 | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward #4HH | 7,000 | 21730549 |
| 652471Amendment | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward Unit #4HH | 6,600 | 21730549 |
| 652471Amendment | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward Unit #4HH | 8,000 | 21730549 |
| 652463 | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward #3HH | 7,000 | 21730548 |
| 652463Amendment | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward Unit #3HH | 6,600 | 21730548 |
| 652460 | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward #2HH | 7,000 | 21730547 |
| 652460Amendment | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward Unit #2HH | 6,600 | 21730547 |
| 652459 | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward #1HH | 7,000 | 21730546 |
| 652459Amendment | Jan 14, 2008 | Jan 14, 2008 | Quicksilver Resources Inc. | Blanche Ward Unit #1HH | 6,600 | 21730546 |
| 652430 | Jan 11, 2008 | Jan 11, 2008 | Quicksilver Resources Inc. | McPherson #3HH | 9,000 | 21730545 |
| 652399 | Jan 10, 2008 | Jan 10, 2008 | Cornerstone E & P Company, LP | Smithey #1HH | 8,400 | 21730544 |
| 652399Amendment | Jan 10, 2008 | Jan 10, 2008 | Cornerstone E & P Company, LP | Smithey #1HH | 8,400 | 21730544 |
| 652010 | Jan 8, 2008 | Jan 8, 2008 | Forest Oil Corporation | Cornerstone #2HH | 11,000 | 21730541 |
| 652036 | Jan 4, 2008 | Jan 4, 2008 | Quicksilver Resources Inc. | McPherson #2HH | 9,000 | 21730542 |
| 652035 | Jan 4, 2008 | Jan 4, 2008 | Quicksilver Resources Inc. | McPherson #1HH | 9,000 | 21730543 |
| 651929 | Jan 3, 2008 | Jan 3, 2008 | EOG Resources, Inc. | Abney Unit #1HH | 10,000 | 21730539 |
| 651929Amendment | Jan 3, 2008 | Jan 3, 2008 | EOG Resources, Inc. | Abney Unit #1HH | 10,000 | 21730539 |
| 651948 | Jan 2, 2008 | Jan 2, 2008 | EOG Resources, Inc. | Kiblinger Unit #1HH | 10,000 | 21730540 |
| 651803 | Dec 28, 2007 | Dec 28, 2007 | EOG Resources, Inc. | Sandra Sue Unit #1HH | 10,000 | 21730538 |
| 651803Amendment | Dec 28, 2007 | Dec 28, 2007 | EOG Resources, Inc. | Sandra Sue Unit #1HH | 10,000 | 21730538 |
| 651555 | Dec 20, 2007 | Dec 20, 2007 | EOG Resources, Inc. | Haney Unit #1HH | 10,000 | 21730535 |
| 651555Amendment | Dec 20, 2007 | Dec 20, 2007 | EOG Resources, Inc. | Haney Unit #1HH | 10,000 | 21730535 |
| 651217 | Dec 17, 2007 | Dec 17, 2007 | Range Production Company | Underwood, R.B. Trust Unit #2HH | 9,000 | 21730534 |
| 651217Amendment | Dec 17, 2007 | Dec 17, 2007 | Range Production Company | Underwood, R.B. Trust Unit #2HH | 9,000 | 21730534 |
| 651213 | Dec 17, 2007 | Dec 17, 2007 | Range Production Company | Underwood, R.B. Trust Unit #1HH | 9,000 | 21730533 |
| 651213Amendment | Dec 17, 2007 | Dec 17, 2007 | Range Production Company | Underwood, R.B. Trust Unit #1HH | 9,000 | 21730533 |
| 651130 | Dec 17, 2007 | Dec 17, 2007 | Range Production Company | Fowler Sawyer Trust Unit #3HH | 9,000 | 21730532 |
| 651122 | Dec 17, 2007 | Dec 17, 2007 | Range Production Company | Fowler Sawyer Trust Unit #2HH | 9,000 | 21730531 |