| 669234 | Sep 6, 2008 | Sep 6, 2008 | Range Production Company | Aquilla Unit #1HH | 9,000 | 21730697 |
| 668971 | Sep 4, 2008 | Sep 4, 2008 | Aspect Abundant Shale LP | DL Gerik #1V | 7,000 | 21730696 |
| 668755 | Sep 4, 2008 | Sep 4, 2008 | Cornerstone E & P Company, LP | Dan Poland #1HH | 8,200 | 21730695 |
| 662153Amendment | Sep 4, 2008 | Sep 4, 2008 | Quicksilver Resources Inc. | Lowell Williams #6HH | 9,000 | 21730635 |
| 668729 | Aug 29, 2008 | Aug 29, 2008 | Cornerstone E & P Company, LP | Edens #1HH | 10,050 | 21730694 |
| 668729Amendment | Aug 29, 2008 | Aug 29, 2008 | Cornerstone E & P Company, LP | Edens #1HH | 10,050 | 21730694 |
| 668729Amendment | Aug 29, 2008 | Aug 29, 2008 | Cornerstone E & P Company, LP | Edens #1HH | 10,050 | 21730694 |
| 668265 | Aug 25, 2008 | Aug 25, 2008 | EOG Resources, Inc. | Holden Unit #8HH | 10,000 | 21730692 |
| 668148 | Aug 22, 2008 | Aug 22, 2008 | EOG Resources, Inc. | Holasek Unit #5HH | 10,000 | 21730689 |
| 668147 | Aug 22, 2008 | Aug 22, 2008 | EOG Resources, Inc. | Holasek Unit #4HH | 10,000 | 21730688 |
| 668260 | Aug 21, 2008 | Aug 21, 2008 | EOG Resources, Inc. | Holden Unit #7HH | 10,000 | 21730693 |
| 668160 | Aug 20, 2008 | Aug 20, 2008 | EOG Resources, Inc. | Holden Unit #6HH | 10,000 | 21730691 |
| 668157 | Aug 20, 2008 | Aug 20, 2008 | EOG Resources, Inc. | Holden Unit #5HH | 10,000 | 21730690 |
| 668146 | Aug 20, 2008 | Aug 20, 2008 | EOG Resources, Inc. | Holasek Unit #3HH | 10,000 | 21730687 |
| 668145 | Aug 20, 2008 | Aug 20, 2008 | EOG Resources, Inc. | Holasek Unit #2HH | 10,000 | 21730686 |
| 668106 | Aug 19, 2008 | Aug 19, 2008 | Range Production Company | Ellig #4HH | 9,000 | 21730685 |
| 668096 | Aug 19, 2008 | Aug 19, 2008 | Quicksilver Resources Inc. | Hasselstrom Unit #1HH | 9,000 | 21730684 |
| 668020 | Aug 19, 2008 | Aug 19, 2008 | Range Production Company | Ellig #3HH | 9,000 | 21730683 |
| 667973 | Aug 19, 2008 | Aug 19, 2008 | Range Production Company | Ellig #2HH | 9,000 | 21730682 |
| 667972 | Aug 18, 2008 | Aug 18, 2008 | Range Production Company | Ellig #1HH | 9,000 | 21730681 |
| 667320 | Aug 9, 2008 | Aug 9, 2008 | EOG Resources, Inc. | Cynthia Unit #4HH | 10,000 | 21730680 |
| 667317 | Aug 9, 2008 | Aug 9, 2008 | EOG Resources, Inc. | Cynthia Unit #3HH | 10,000 | 21730679 |
| 667088 | Aug 7, 2008 | Aug 7, 2008 | EOG Resources, Inc. | Joyce Unit #3HH | 10,000 | 21730678 |
| 667087 | Aug 6, 2008 | Aug 6, 2008 | EOG Resources, Inc. | Joyce Unit #2HH | 10,000 | 21730677 |
| 666888 | Aug 5, 2008 | Aug 5, 2008 | EOG Resources, Inc. | Ellig Unit #2HH | 10,000 | 21730676 |
| 666886 | Aug 5, 2008 | Aug 5, 2008 | EOG Resources, Inc. | Ellig Unit #1HH | 10,000 | 21730675 |
| 662639Amendment | Aug 5, 2008 | Aug 5, 2008 | EOG Resources, Inc. | Padgett Unit #1HH | 10,000 | 21730641 |
| 666563 | Aug 1, 2008 | Aug 1, 2008 | Quicksilver Resources Inc. | Pyle-Mercer Unit #2HH | 9,000 | 21730674 |
| 666255 | Jul 28, 2008 | Jul 28, 2008 | Quicksilver Resources Inc. | Pyle-Mercer Unit #1HH | 9,000 | 21730673 |
| 660655Amendment | Jul 28, 2008 | Jul 28, 2008 | EOG Resources, Inc. | Lou Ellen Unit #1HH | 10,000 | 21730613 |
| 665975 | Jul 23, 2008 | Jul 23, 2008 | Forest Oil Corporation | Duke #10HH | 11,500 | 21730672 |
| 665445 | Jul 17, 2008 | Jul 17, 2008 | Cornerstone E & P Company, LP | Hajek #1HH | 8,600 | 21730671 |
| 665248 | Jul 16, 2008 | Jul 16, 2008 | EOG Resources, Inc. | Vaughan Unit #1H | 10,000 | 21730670 |
| 665125 | Jul 15, 2008 | Jul 15, 2008 | EOG Resources, Inc. | Tommy Ray Unit #1HH | 10,000 | 21730669 |
| 665125Amendment | Jul 15, 2008 | Jul 15, 2008 | EOG Resources, Inc. | Tommy Ray Unit #1HH | 10,000 | 21730669 |
| 665093 | Jul 15, 2008 | Jul 15, 2008 | EOG Resources, Inc. | Mary McQuagge Unit #2HH | 10,000 | 21730668 |
| 664625 | Jul 3, 2008 | Jul 3, 2008 | EOG Resources, Inc. | Lou Ellen Unit #2HH | 10,000 | 21730667 |
| 664566 | Jul 3, 2008 | Jul 3, 2008 | Forest Oil Corporation | Pinner #3HH | 14,400 | 21730666 |
| 664479 | Jul 1, 2008 | Jul 1, 2008 | Quicksilver Resources Inc. | Dudley Farms Unit #6HH | 9,000 | 21730664 |
| 664476 | Jul 1, 2008 | Jul 1, 2008 | Quicksilver Resources Inc. | Dudley Farms Unit #4HH | 9,000 | 21730663 |
| 664473 | Jul 1, 2008 | Jul 1, 2008 | Quicksilver Resources Inc. | Dudley Farms Unit #3HH | 9,000 | 21730662 |
| 664456 | Jul 1, 2008 | Jul 1, 2008 | Quicksilver Resources Inc. | Dudley Farms Unit #5HH | 9,000 | 21730665 |
| 664243 | Jun 30, 2008 | Jun 30, 2008 | EOG Resources, Inc. | Cole Unit #4HH | 10,000 | 21730659 |
| 664250 | Jun 28, 2008 | Jun 28, 2008 | EOG Resources, Inc. | Holden Unit #4HH | 10,000 | 21730661 |
| 664240 | Jun 28, 2008 | Jun 28, 2008 | EOG Resources, Inc. | Cole Unit #3HH | 10,000 | 21730660 |
| 664219 | Jun 28, 2008 | Jun 28, 2008 | EOG Resources, Inc. | Cole Unit #2HH | 10,000 | 21730658 |
| 664160 | Jun 27, 2008 | Jun 27, 2008 | Cornerstone E & P Company, LP | Covington Acres #1HH | 8,000 | 21730657 |
| 663986 | Jun 25, 2008 | Jun 25, 2008 | EOG Resources, Inc. | Chambers Unit #1HH | 10,000 | 21730656 |
| 663701 | Jun 21, 2008 | Jun 21, 2008 | Quicksilver Resources Inc. | Shelby South #1HH | 9,000 | 21730655 |
| 662495 | Jun 20, 2008 | Jun 20, 2008 | Cornerstone E & P Company, LP | Clark #3HH | 9,000 | 21730640 |
| 663504 | Jun 19, 2008 | Jun 19, 2008 | Range Production Company | Griffith Unit #3HH | 9,000 | 21730652 |
| 663503 | Jun 18, 2008 | Jun 18, 2008 | Range Production Company | Griffith Unit #2HH | 9,000 | 21730651 |
| 663503Amendment | Jun 18, 2008 | Jun 18, 2008 | Range Production Company | Griffith Unit #2HH | 9,000 | 21730651 |
| 663502 | Jun 18, 2008 | Jun 18, 2008 | Range Production Company | Griffith Unit #1HH | 9,000 | 21730650 |
| 663502Amendment | Jun 18, 2008 | Jun 18, 2008 | Range Production Company | Griffith Unit #1HH | 9,000 | 21730650 |
| 663294 | Jun 18, 2008 | Jun 18, 2008 | EOG Resources, Inc. | Timothy Unit #1H | 10,000 | 21730649 |
| 663294Amendment | Jun 18, 2008 | Jun 18, 2008 | EOG Resources, Inc. | Timothy Unit #1HH | 10,000 | 21730649 |
| 662503 | Jun 18, 2008 | Jun 18, 2008 | Cornerstone E & P Company, LP | Clark #4HH | 9,000 | 21730654 |
| 661687 | Jun 18, 2008 | Jun 18, 2008 | Forest Oil Corporation | Duke #1HH | 11,500 | 21730653 |
| 661687Amendment | Jun 18, 2008 | Jun 18, 2008 | Forest Oil Corporation | Duke #1HH | 11,500 | 21730653 |
| 663208 | Jun 17, 2008 | Jun 17, 2008 | Quicksilver Resources Inc. | Johnson/Hill Land & Mineral Unit #1HH | 9,000 | 21730647 |
| 663198 | Jun 17, 2008 | Jun 17, 2008 | Quicksilver Resources Inc. | Miller Unit #1HH | 9,000 | 21730646 |
| 663167 | Jun 17, 2008 | Jun 17, 2008 | Range Production Company | Collins Lease #1HH | 9,000 | 21730645 |
| 663167Amendment | Jun 17, 2008 | Jun 17, 2008 | Range Production Company | Collins Unit #1HH | 9,000 | 21730645 |
| 662971 | Jun 13, 2008 | Jun 13, 2008 | Range Production Company | Fletcher, James Unit #3HH | 9,000 | 21730644 |
| 662970 | Jun 13, 2008 | Jun 13, 2008 | Range Production Company | Fletcher, James Unit #2HH | 9,000 | 21730643 |
| 662968 | Jun 13, 2008 | Jun 13, 2008 | Range Production Company | Fletcher, James Unit #1HH | 9,000 | 21730648 |
| 662639 | Jun 11, 2008 | Jun 11, 2008 | EOG Resources, Inc. | Padgett Unit #1HH | 10,000 | 21730641 |
| 662643 | Jun 10, 2008 | Jun 10, 2008 | EOG Resources, Inc. | Greenhill Unit #1HH | 10,000 | 21730642 |
| 662643Amendment | Jun 10, 2008 | Jun 10, 2008 | EOG Resources, Inc. | Greenhill Unit #1HH | 10,000 | 21730642 |
| 662399 | Jun 7, 2008 | Jun 7, 2008 | Aspect Abundant Shale LP | Janda #1HH | 10,500 | 21730639 |
| 662370 | Jun 7, 2008 | Jun 7, 2008 | EOG Resources, Inc. | Mears Unit #1HH | 10,000 | 21730638 |
| 662370Amendment | Jun 7, 2008 | Jun 7, 2008 | EOG Resources, Inc. | Mears Unit #1HH | 10,000 | 21730638 |
| 662245 | Jun 6, 2008 | Jun 6, 2008 | Cornerstone E & P Company, LP | Saunders #1HH | 8,000 | 21730637 |
| 662163 | Jun 5, 2008 | Jun 5, 2008 | EOG Resources, Inc. | Crouch Unit #1HH | 10,000 | 21730636 |
| 662163Amendment | Jun 5, 2008 | Jun 5, 2008 | EOG Resources, Inc. | Crouch Unit #1HH | 10,000 | 21730636 |
| 662153 | Jun 5, 2008 | Jun 5, 2008 | Quicksilver Resources Inc. | Williams, Lowell #6HH | 9,000 | 21730635 |
| 662149 | Jun 5, 2008 | Jun 5, 2008 | Quicksilver Resources Inc. | Lowell Williams #5HH | 9,000 | 21730634 |
| 662146 | Jun 5, 2008 | Jun 5, 2008 | Quicksilver Resources Inc. | Lowell Williams #4HH | 9,000 | 21730633 |
| 662142 | Jun 5, 2008 | Jun 5, 2008 | Quicksilver Resources Inc. | Williams, Lowell #2HH | 9,000 | 21730631 |
| 662142Amendment | Jun 5, 2008 | Jun 5, 2008 | Quicksilver Resources Inc. | Lowell Williams #2HH | 9,000 | 21730631 |
| 662129 | Jun 5, 2008 | Jun 5, 2008 | Quicksilver Resources Inc. | Lowell Williams #1HH | 9,000 | 21730630 |
| 661781 | May 30, 2008 | May 30, 2008 | Range Production Company | Hooks, P. #8HH | 9,000 | 21730629 |
| 661718 | May 30, 2008 | May 30, 2008 | Forest Oil Corporation | Duke #2HH | 11,500 | 21730628 |
| 661717 | May 30, 2008 | May 30, 2008 | Forest Oil Corporation | Duke #5HH | 11,500 | 21730627 |
| 661696 | May 30, 2008 | May 30, 2008 | Forest Oil Corporation | Duke #8HH | 11,500 | 21730626 |
| 661695 | May 29, 2008 | May 29, 2008 | Forest Oil Corporation | Duke #7HH | 11,500 | 21730625 |
| 661691 | May 29, 2008 | May 29, 2008 | Forest Oil Corporation | Duke #6HH | 11,500 | 21730624 |
| 661635 | May 29, 2008 | May 29, 2008 | Quicksilver Resources Inc. | Taylor Family Trust #1HH | 9,000 | 21730623 |
| 661325 | May 28, 2008 | May 28, 2008 | Quicksilver Resources Inc. | McCarver #2HH | 9,000 | 21730622 |
| 661608 | May 27, 2008 | May 27, 2008 | Forest Oil Corporation | Pinner #2HH | 11,500 | 21730621 |
| 661476 | May 27, 2008 | May 27, 2008 | EOG Resources, Inc. | Coldiron Unit #1HH | 10,000 | 21730620 |
| 661424 | May 23, 2008 | May 23, 2008 | EOG Resources, Inc. | Ellison Unit #1HH | 10,000 | 21730619 |
| 661324 | May 22, 2008 | May 22, 2008 | Quicksilver Resources Inc. | McCarver #1HH | 9,000 | 21730618 |
| 661305 | May 22, 2008 | May 22, 2008 | Aspect Abundant Shale LP | Hokit #1HH | 11,500 | 21730617 |
| 660947 | May 20, 2008 | May 20, 2008 | EOG Resources, Inc. | McDaniel Unit #1HH | 10,000 | 21730616 |
| 660947Amendment | May 20, 2008 | May 20, 2008 | EOG Resources, Inc. | McDaniel Unit #1HH | 10,000 | 21730616 |
| 660919 | May 20, 2008 | May 20, 2008 | EOG Resources, Inc. | Joy Ann Unit #1HH | 10,000 | 21730615 |
| 660915 | May 20, 2008 | May 20, 2008 | EOG Resources, Inc. | Jay Kirk Unit #1HH | 10,000 | 21730614 |
| 660655 | May 15, 2008 | May 15, 2008 | EOG Resources, Inc. | Lou Ellen Unit #1HH | 10,000 | 21730613 |