| 1 | 4-Sight Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2006 |
| 2 | 4-Sight Operating Company II | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2000 |
| 3 | 4-Sight Operating Company, LTD. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2024 |
| 4 | 4R Oil Company | Tyler, TX 75703 | Oil & Gas Operator | Apr 1997 |
| 5 | 5R Oil Company | Tyler, TX 75703 | Oil & Gas Operator | Nov 2024 |
| 6 | 84 Energy LLC | Flatonia, TX 78941 | Oil & Gas Operator | Nov 2024 |
| 7 | A J A Companies | Tyler, TX 75703 | Oil Operator | Nov 2024 |
| 8 | Ableready, Inc. | Houston, TX 77269 | Oil & Gas Operator | Nov 2024 |
| 9 | Acirema Corporation | Longview, TX 75608 | Oil & Gas Operator | Nov 2024 |
| 10 | Adamson Exploration Corporation | Kilgore, TX 75662 | Oil & Gas Operator | Mar 2008 |
| 11 | Agate Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2015 |
| 12 | Alice-Sidney Oil Co | El Dorado, AR 71730 | Oil & Gas Operator | Feb 1995 |
| 13 | Allar Co., The | Graham, TX 76450 | Oil & Gas Operator | Dec 2004 |
| 14 | Alliance Resources LLC | Midland, TX 79705 | Oil & Gas Operator | Nov 2024 |
| 15 | Altair Energy Corp. | Tyler, TX 75702 | Oil & Gas Operator | Jun 1994 |
| 16 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 17 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 18 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 19 | Ameritech Oil & Gas Corporation | Dallas, TX 75248 | Oil & Gas Operator | May 1996 |
| 20 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 21 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Nov 2024 |
| 22 | Amplify Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 23 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 24 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Nov 2024 |
| 25 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Sep 2024 |
| 26 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Nov 2024 |
| 27 | Archon Resources LLC | Houston, TX 77074 | Oil & Gas Operator | Jan 2015 |
| 28 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 29 | Arco Permian | Houston, TX 77079 | Oil & Gas Operator | Dec 2001 |
| 30 | Arena Resources LLC | Longview, TX 75608 | Oil & Gas Operator | Sep 2024 |
| 31 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | Nov 2024 |
| 32 | Aries Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2010 |
| 33 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 34 | Armor Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Nov 2024 |
| 35 | Aroc (Texas) Inc | Houston, TX 77090 | Oil & Gas Operator | Dec 2014 |
| 36 | Arrow Rock Energy, LLC | Houston, TX 77079 | Oil & Gas Operator | Mar 2018 |
| 37 | Asa Oil & Gas, Inc. | Brady, TX 76825 | Oil & Gas Operator | Nov 2024 |
| 38 | Atasca Resources Inc | Houston, TX 77219 | Oil & Gas Operator | Nov 2024 |
| 39 | Atoka Operating, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Nov 2024 |
| 40 | Atropos Exploration Company | Dallas, TX 75225 | Oil & Gas Operator | Nov 2024 |
| 41 | Austex Energy, Inc. | Granbury, TX 76048 | Oil & Gas Operator | Apr 1993 |
| 42 | Axtel Energy, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Nov 2024 |
| 43 | B & B Oil, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | Nov 2024 |
| 44 | B & G Energy Corporation | Dallas, TX 75214 | Oil & Gas Operator | Nov 2024 |
| 45 | Bahr Oil & Gas | Shalimar, FL 32579 | Oil & Gas Operator | Nov 2024 |
| 46 | Bailey Oil Co., Inc. | Neodesha, KS 66757 | Oil & Gas Operator | May 2024 |
| 47 | Bargo Energy Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 48 | Basa Resources Inc | Dallas, TX 75254 | Oil & Gas Operator | Nov 2024 |
| 49 | BBHP Oilfield Services LLC | Kilgore, TX 75662 | Oil Operator | Nov 2024 |
| 50 | Beckville Disp Operations, LLC | Henderson, TX 75652 | Oil Operator | Nov 2024 |
| 51 | Berry, Thomas N. & Co. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2012 |
| 52 | Big Run Production Company | Tyler, TX 75701 | Oil & Gas Operator | Nov 2024 |
| 53 | BKM Production | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2024 |
| 54 | Black Diamond Operating Co., LLC | Kilgore, TX 75662 | Oil & Gas Operator | Sep 2009 |
| 55 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Nov 2024 |
| 56 | Bonanza Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2000 |
| 57 | Bond Operating Company | Dallas, TX 75219 | Oil & Gas Operator | Nov 2024 |
| 58 | Bowles Energy, Inc. | Longview, TX 75601 | Oil & Gas Operator | Nov 2024 |
| 59 | Bowles Properties, Inc. | Longview, TX 75606 | Oil & Gas Operator | Dec 1998 |
| 60 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 61 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Nov 2024 |
| 62 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2024 |
| 63 | Bracken Production Company | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 64 | Brammer-Keystone Energy, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2000 |
| 65 | Brashear Production Service, Inc | Longview, TX 75602 | Oil & Gas Operator | Mar 2008 |
| 66 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 67 | Breitburn Operating LP | Houston, TX 77002 | Oil & Gas Operator | Nov 2024 |
| 68 | BRG Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2020 |
| 69 | Brian Energy | Kilgore, TX 75663 | Oil & Gas Operator | May 2013 |
| 70 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2024 |
| 71 | Brooks Petroleum Company | Tyler, TX 75703 | Oil & Gas Operator | Nov 2024 |
| 72 | Brothers Oil & Equipment, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2024 |
| 73 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 74 | Brown, H.L. Operating, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Nov 2024 |
| 75 | Bryant - Chase Energy Corp. | Tyler, TX 75701 | Oil & Gas Operator | Aug 2004 |
| 76 | Buccaneer Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2024 |
| 77 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Nov 2024 |
| 78 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Nov 2024 |
| 79 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 80 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Nov 2024 |
| 81 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 82 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 83 | C & D Energy Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1994 |
| 84 | C. W. Resources, Inc. | Longview, TX 75604 | Oil & Gas Operator | Nov 2024 |
| 85 | Cali Crude LLC | Austin, TX 78738 | Oil Operator | Nov 2024 |
| 86 | Calico Operating Co., Inc. | Dallas, TX 75205 | Oil & Gas Operator | Dec 2002 |
| 87 | Cameron Exploration, Inc. | Longview, TX 75604 | Oil & Gas Operator | Nov 2024 |
| 88 | Cape Operating, Inc. | Longview, TX 75608 | Oil & Gas Operator | Nov 2007 |
| 89 | Cape, Randy | Tyler, TX 75703 | Oil & Gas Operator | Mar 2008 |
| 90 | Capps, R. Oil Corp. | Midland, TX 79704 | Oil & Gas Operator | Oct 2002 |
| 91 | Carpco Efficient Energy Co., LLC | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2024 |
| 92 | Carter Resources | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2005 |
| 93 | Cci East Texas Upstream LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2021 |
| 94 | Cci Gulf Coast Upstream LLC | Teague, TX 75860 | Oil & Gas Operator | Mar 2021 |
| 95 | Ceja Corporation | Tulsa, OK 74172 | Oil & Gas Operator | Sep 2024 |
| 96 | Champ Operating Company | Dallas, TX 75208 | Oil & Gas Operator | Oct 2020 |
| 97 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jul 2024 |
| 98 | Chesapeake Operating, LLC | Oklahoma City, OK 73154 | Oil & Gas Operator | Nov 2024 |
| 99 | Chestnut Explor. And Prod., Inc. | Dallas, TX 75208 | Oil & Gas Operator | Nov 2024 |
| 100 | Chestnut Petroleum, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Nov 2011 |