| 1 | Alpine Petroleum | Abilene, TX 79608 | Oil & Gas Operator | Jul 2018 |
| 2 | Anathema, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Dec 1994 |
| 3 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 4 | Arbol Resources, Inc. | Houston, TX 77079 | Oil & Gas Operator | May 2025 |
| 5 | Ard Drilling Company Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2000 |
| 6 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 7 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 8 | Aspen Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 2012 |
| 9 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 10 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 11 | Ausanka Oil Operations | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 12 | Barbee, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 13 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 14 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 15 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 16 | Big State Industries, Inc. | Houston, TX 77010 | Oil & Gas Operator | Apr 2024 |
| 17 | Birge Oil Co. | Wichita Falls, TX 76302 | Oil & Gas Operator | Jun 1995 |
| 18 | BKM Production | Gainesville, TX 76240 | Oil & Gas Operator | May 2025 |
| 19 | BP Prod. Corp. | Richardson, TX 75083 | Oil & Gas Operator | May 2025 |
| 20 | Braman, D. H., Jr. | Victoria, TX 77901 | Oil & Gas Operator | Dec 2008 |
| 21 | Brandt, Bodie | Iowa Park, TX 76367 | Oil & Gas Operator | May 2025 |
| 22 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 23 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 24 | Brooks, E. B., Jr. | Dallas, TX 75206 | Oil & Gas Operator | May 2018 |
| 25 | Bta Oil Producers | Midland, TX 79701 | Oil & Gas Operator | Sep 2009 |
| 26 | Buck Wheat Resources, L.P. | Eastland, TX 76448 | Oil & Gas Operator | May 2025 |
| 27 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | May 2025 |
| 28 | Bullet Development, LLC | Abilene, TX 79601 | Oil & Gas Operator | May 2025 |
| 29 | Burgundy Oil & Gas, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 30 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 31 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 32 | Burns, P. C. Oil Producers Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2000 |
| 33 | Cada Operating, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Nov 2004 |
| 34 | Caddo Corporation | Austin, TX 78731 | Oil & Gas Operator | May 2025 |
| 35 | Canan Mowrey Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 36 | CH-Seon Inc. | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 37 | Chance Oil Co., Inc. | Vernon, TX 76385 | Oil & Gas Operator | Mar 2025 |
| 38 | Chap Operating, Inc. | Knox City, TX 79529 | Oil & Gas Operator | May 2025 |
| 39 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jan 2025 |
| 40 | Chisholm Exploration | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 41 | Cholla Petroleum Inc | Dallas, TX 75225 | Oil & Gas Operator | May 2025 |
| 42 | Citation Oil & Gas Corp. | Houston, TX 77269 | Oil & Gas Operator | May 2025 |
| 43 | Citori Oil Company, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2014 |
| 44 | Clear Fork, Incorporated | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 45 | Coda Energy, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 46 | COG Operating LLC | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 47 | Conoco Inc. | Houston, TX 77252 | Oil & Gas Operator | Mar 2015 |
| 48 | Continual Oil & Gas, Inc. | Abilene, TX 79602 | Oil & Gas Operator | May 2025 |
| 49 | Cooper Oil & Gas, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | May 2025 |
| 50 | Corda Corporation | Wichita Falls, TX 76302 | Oil & Gas Operator | May 2025 |
| 51 | Covenant Operating, LLC | Wichita Falls, TX 76308 | Oil Operator | May 2025 |
| 52 | Creed Operating Co., LLC | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2025 |
| 53 | Crego Exploration | Dallas, TX 75243 | Oil & Gas Operator | May 2025 |
| 54 | CRT'S, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Aug 2008 |
| 55 | Cuatro Oil And Gas Corporation | Abilene, TX 79603 | Oil & Gas Operator | May 2025 |
| 56 | D.J. & T. Energy | Abilene, TX 79601 | Oil & Gas Operator | May 2025 |
| 57 | Dalen Resources Oil & Gas Co. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 58 | Delray Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 59 | Delta Oil & Gas LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 60 | Delwintex Oil & Gas Prop., Inc. | Lubbock, TX 79423 | Oil & Gas Operator | Aug 2003 |
| 61 | Desana Development Corporation | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 62 | Dinero Operating Co | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 63 | Dreyfus, Louis Natural Gas Corp | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2001 |
| 64 | Dry Fork Production Co., LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 65 | Earthbound Resources LLC | Merkel, TX 79536 | Oil & Gas Operator | May 2025 |
| 66 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 67 | Edwards, Gus Co. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2004 |
| 68 | Ellison, Dewitt, Jr. | Aspermont, TX 79502 | Oil & Gas Operator | Mar 2016 |
| 69 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 70 | Energy Resource & Develop., Corp | Rockwall, TX 75087 | Oil & Gas Operator | Jun 1998 |
| 71 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Jan 2025 |
| 72 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 73 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 74 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Feb 2025 |
| 75 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 76 | Feagan Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 77 | Felderhoff Production Company | Muenster, TX 76252 | Oil & Gas Operator | May 2025 |
| 78 | Fredonia Resources Inc. | Longview, TX 75606 | Oil & Gas Operator | Aug 2003 |
| 79 | Freeman Expl. & Prod. Co., Inc. | Houston, TX 77279 | Oil & Gas Operator | Aug 2020 |
| 80 | Gaea Services, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2021 |
| 81 | Ginnings Company | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2025 |
| 82 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 83 | Grandfield Consulting, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2011 |
| 84 | Great American Resources Inc. | Bowie, TX 76230 | Oil & Gas Operator | May 2025 |
| 85 | Gregco, Inc. | Paducah, TX 79248 | Oil & Gas Operator | May 1999 |
| 86 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 87 | Hale Oil & Gas Properties | Graham, TX 76450 | Oil & Gas Operator | Jul 1997 |
| 88 | Halliburton Operating Company | Plano, TX 75093 | Oil & Gas Operator | May 2025 |
| 89 | Hanson Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 90 | Hat Oil & Gas, Inc. | Slaton, TX 79364 | Oil & Gas Operator | Feb 2002 |
| 91 | Helmcamp, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2002 |
| 92 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 93 | Henson Exploration, L.P. | Abilene, TX 79608 | Oil & Gas Operator | May 2025 |
| 94 | HGN Operating I, LLC | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 95 | High River Res Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2025 |
| 96 | Holli-Tex Supply Co. | Holliday, TX 76366 | Oil & Gas Operator | May 2018 |
| 97 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 98 | International Western Oil Corp | Weatherford, TX 76086 | Oil & Gas Operator | May 2025 |
| 99 | Interstate Explorations LLC | Houston, TX 77010 | Oil & Gas Operator | May 2025 |
| 100 | J & J Trading | Abilene, TX 79608 | Oil & Gas Operator | Dec 2004 |