| 1 | 3 S Production, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Apr 2026 |
| 2 | 3-T Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2026 |
| 3 | 86-Oil & Gas | Hamlin, TX 79520 | Oil & Gas Operator | Oct 2003 |
| 4 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2026 |
| 5 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 6 | Adams Branch Exploration Company | Abilene, TX 79608 | Oil & Gas Operator | Jul 2002 |
| 7 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 8 | Alegre Energy Operating, LP | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2005 |
| 9 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2026 |
| 10 | Alexander Resources, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2026 |
| 11 | Allegro Investments, Inc. | Victoria, TX 77903 | Oil & Gas Operator | Nov 2020 |
| 12 | Alpha Energy | Anson, TX 79501 | Oil & Gas Operator | Oct 2016 |
| 13 | Alpine Petroleum | Abilene, TX 79608 | Oil & Gas Operator | Jul 2018 |
| 14 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 15 | Amoco Production Company | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 16 | Anathema, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Dec 1994 |
| 17 | Anderson, Carl T. | Wichita Falls, TX 76301 | Oil & Gas Operator | Feb 2014 |
| 18 | Anderson, Dorman | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2012 |
| 19 | Anderson, James K. Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 2026 |
| 20 | Antle, E. | Graham, TX 76450 | Oil & Gas Operator | Oct 1994 |
| 21 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Apr 2026 |
| 22 | Arbol Resources, Inc. | Houston, TX 77079 | Oil & Gas Operator | Apr 2026 |
| 23 | Arch Petroleum Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2008 |
| 24 | Argee Oil Company | Midland, TX 79702 | Gas Operator | May 1994 |
| 25 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Apr 2026 |
| 26 | Ashland Exploration Inc | Houston, TX 77218 | Oil & Gas Operator | Nov 2000 |
| 27 | Ashtola Exploration Company,Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Apr 2026 |
| 28 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 29 | Aurora Power Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Aug 2018 |
| 30 | B-K Operating | Whitesboro, TX 76273 | Oil & Gas Operator | Oct 1997 |
| 31 | B.R.H. Investments, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Apr 1998 |
| 32 | Banam Corporation | Midland, TX 79702 | Oil & Gas Operator | Nov 2013 |
| 33 | Bara Corporation | Flower Mound, TX 75027 | Oil & Gas Operator | Apr 2004 |
| 34 | Barbee, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 35 | Barnett Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 1999 |
| 36 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 37 | Benson & Schoen Oil Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | Apr 2012 |
| 38 | Bentgrass Of Texas, Inc. | Abilene, TX 79608 | Oil Operator | Apr 2026 |
| 39 | Bentley Oil & Gas Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2026 |
| 40 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 41 | Bexco Operating, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Apr 2026 |
| 42 | Big Al Oil And Gas | Abilene, TX 79608 | Oil & Gas Operator | Apr 2026 |
| 43 | Black Oil Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 44 | Bloomer & Associates, Inc. | Lago VIsta, TX 78645 | Oil & Gas Operator | Jul 2002 |
| 45 | Bo Dunagin Operating, LLC | Merkel, TX 79536 | Oil Operator | Mar 2019 |
| 46 | Boaz Energy II Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2026 |
| 47 | Bootstrap Exploration, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Jun 2021 |
| 48 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 49 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 50 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | Apr 2026 |
| 51 | Braman, D. H., Jr. | Victoria, TX 77901 | Oil & Gas Operator | Dec 2008 |
| 52 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 53 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 54 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2026 |
| 55 | Brigham Oil & Gas, L.P. | Austin, TX 78730 | Oil & Gas Operator | Oct 2015 |
| 56 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 57 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 58 | Brittany Drilling Co. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2000 |
| 59 | Brooks, E. B., Jr. | Dallas, TX 75206 | Oil & Gas Operator | May 2018 |
| 60 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | Apr 2026 |
| 61 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 62 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 63 | Brown, H. L., Jr. | Midland, TX 79702 | Oil & Gas Operator | May 2002 |
| 64 | Buck Wheat Resources, L.P. | Eastland, TX 76448 | Oil & Gas Operator | Apr 2026 |
| 65 | Bud Oil, Inc. | Duncan, OK 73534 | Oil & Gas Operator | Apr 2026 |
| 66 | Burger, F.W. Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 67 | Burgess, W. E. | Fort Worth, TX 76147 | Oil & Gas Operator | Apr 2026 |
| 68 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 69 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Apr 2026 |
| 70 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 71 | Burns, Bill C. | Midland, TX 79701 | Oil & Gas Operator | Dec 1997 |
| 72 | Burns, P. C. Oil Producers Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2000 |
| 73 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |
| 74 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | Apr 2026 |
| 75 | Byrne Oil Company | Lubbock, TX 79464 | Oil & Gas Operator | Apr 2026 |
| 76 | C & R Oil Co. | Abilene, TX 79605 | Oil & Gas Operator | Apr 2026 |
| 77 | Cabana Oil Corp. | Abilene, TX 79608 | Oil & Gas Operator | Feb 2006 |
| 78 | Caddo Corporation | Austin, TX 78731 | Oil & Gas Operator | Apr 2026 |
| 79 | Calhoun & Ellison Oil Co. | San Antonio, TX 78248 | Oil & Gas Operator | Dec 1997 |
| 80 | Can-Tex Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Nov 2003 |
| 81 | Canan Mowrey Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2026 |
| 82 | Caribou Operating Co. | Granbury, TX 76048 | Oil & Gas Operator | Mar 2010 |
| 83 | Cass Energy Corp | Dallas, TX 75225 | Oil & Gas Operator | Aug 2003 |
| 84 | Cawell Energy, LLC | Spring, TX 77379 | Oil Operator | Apr 2026 |
| 85 | Cazar Energy Inc | Austin, TX 78734 | Oil & Gas Operator | Apr 2026 |
| 86 | Cedar Oil Company | Midland, TX 79707 | Oil & Gas Operator | Apr 2026 |
| 87 | Certified Petroleum Inc. | Mineral Wells, TX 76067 | Oil & Gas Operator | May 2006 |
| 88 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 89 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Apr 2026 |
| 90 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2025 |
| 91 | Chi Operating, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 92 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | Apr 2026 |
| 93 | Chisholm Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Apr 2026 |
| 94 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | Apr 2026 |
| 95 | Cimarex Energy Co. Of Colorado | Midland, TX 79706 | Oil & Gas Operator | Apr 2026 |
| 96 | Cinnabar Energy, LTD. | Fort Worth, TX 76107 | Oil & Gas Operator | May 2018 |
| 97 | Citation Oil & Gas Corp | Houston, TX 77269 | Oil & Gas Operator | Apr 2026 |
| 98 | CLC Operations Inc | Midland, TX 79701 | Oil & Gas Operator | Mar 1997 |
| 99 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | Apr 2026 |
| 100 | Clear Water Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |