| 1 | 1859 Operating LLC | Dripping SPGS, TX 78620 | Oil Operator | May 2025 |
| 2 | 3-L Drilling | Abilene, TX 79605 | Oil & Gas Operator | May 2025 |
| 3 | 338 Oil & Gas, Inc. | Devine, TX 78016 | Oil Operator | Feb 2021 |
| 4 | A-G-B, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2003 |
| 5 | Aaronmark Services, LLC | New Braunfels, TX 78130 | Oil Operator | May 2025 |
| 6 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | May 2025 |
| 7 | Ackerman, Albert C. | Boerne, TX 78006 | Oil & Gas Operator | Oct 1995 |
| 8 | Acock Operating Limited | San Antonio, TX 78270 | Oil & Gas Operator | May 2025 |
| 9 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 10 | American Eagle Resources, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | May 2025 |
| 11 | Aminex USA, Inc. | Somerset, TX 78069 | Oil & Gas Operator | May 2018 |
| 12 | Apache Oil Company | San Antonio, TX 78227 | Oil & Gas Operator | Jun 2023 |
| 13 | Aransas Oil Company, Inc. | San Antonio, TX 78253 | Oil & Gas Operator | Jan 1999 |
| 14 | Arben Oil, Inc. | Coleman, TX 76834 | Oil & Gas Operator | May 2025 |
| 15 | Atascosa Exploration, LLC | San Antonio, TX 78209 | Oil Operator | Apr 2020 |
| 16 | Atnipp, H. L. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 17 | Austin Energy Operations, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | May 2025 |
| 18 | Azul, Inc. | Buffalo Gap, TX 79508 | Oil & Gas Operator | Aug 1995 |
| 19 | B & B Production Co | Midland, TX 79708 | Oil & Gas Operator | Dec 2002 |
| 20 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | May 2025 |
| 21 | Bailey, L. J. | Pleasanton, TX 78064 | Oil & Gas Operator | Jul 2003 |
| 22 | Barnes, K. A. | Somerset, TX 78069 | Oil & Gas Operator | Jan 2013 |
| 23 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | May 2025 |
| 24 | Beta Oil Corporation | San Antonio, TX 78232 | Oil & Gas Operator | May 2025 |
| 25 | Bissell Operating LLC | San Antonio, TX 78216 | Oil Operator | Oct 2016 |
| 26 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | May 2025 |
| 27 | Black Jack Well Service, Inc. | Somerset, TX 78069 | Oil & Gas Operator | Aug 2003 |
| 28 | Blackjack Operating L. L. C. | Schertz, TX 78154 | Oil & Gas Operator | May 2025 |
| 29 | Blue Wing Energy, Inc. | Portland, TX 78374 | Oil & Gas Operator | May 2025 |
| 30 | Brander, Sam H. | San Antonio, TX 78264 | Oil & Gas Operator | May 2025 |
| 31 | Bright Hawk Operating Company | Spring, TX 77388 | Oil & Gas Operator | May 2025 |
| 32 | Brinkoeter Gas & Oil | Converse, TX 78109 | Oil & Gas Operator | Aug 2004 |
| 33 | Britanco, L.L.C. | Falls City, TX 78113 | Oil & Gas Operator | May 2025 |
| 34 | Butler, Kevin O. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 35 | Butler, Kevin O. & Assoc., Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 36 | Cactus Gas & Oil, Inc. | San Antonio, TX 78259 | Oil & Gas Operator | May 2025 |
| 37 | Calame, Richard | Devine, TX 78016 | Oil Operator | May 2025 |
| 38 | Caldwell, J. A. | San Antonio, TX 78223 | Oil & Gas Operator | Jun 2000 |
| 39 | Calfas Cattle & Oil, LLC | San Antonio, TX 78205 | Oil & Gas Operator | May 2025 |
| 40 | Calfas Oil, LLC | San Antonio, TX 78205 | Oil Operator | May 2025 |
| 41 | Calk Oil Company | Lytle, TX 78052 | Oil Operator | May 2025 |
| 42 | Calk Operating, LLC | Lytle, TX 78052 | Oil Operator | May 2025 |
| 43 | Calk, Roger D. | Lytle, TX 78052 | Oil & Gas Operator | May 2025 |
| 44 | Cap Operating Inc. | Borger, TX 79008 | Oil & Gas Operator | May 2025 |
| 45 | Carter, Shirley Oil Co | Round Rock, TX 78665 | Oil & Gas Operator | Jun 2018 |
| 46 | Casias Oil Well Service, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Jul 2020 |
| 47 | Caspen Operating Company | Somerset, TX 78069 | Oil & Gas Operator | Mar 2008 |
| 48 | CBR Oil Company | Lytle, TX 78052 | Oil & Gas Operator | Jul 1997 |
| 49 | CG Oil Co. | San Antonio, TX 78232 | Oil & Gas Operator | Mar 2011 |
| 50 | Cibolo Production, LLC | Boerne, TX 78006 | Oil Operator | Jan 2020 |
| 51 | Civron Petroleum Res., LLC | San Antonio, TX 78229 | Oil & Gas Operator | May 2025 |
| 52 | Clamp Operating | San Antonio, TX 78264 | Oil & Gas Operator | Apr 2002 |
| 53 | Clamp Operating Incorporated | San Antonio, TX 78264 | Oil & Gas Operator | Mar 2011 |
| 54 | Clark, G. A., Trustee | San Antonio, TX 78210 | Oil & Gas Operator | Nov 2017 |
| 55 | Colt Operating Corporation | San Antonio, TX 78231 | Oil & Gas Operator | Aug 2003 |
| 56 | Columbia Energy Properties, Inc. | Baytown, TX 77521 | Oil & Gas Operator | Jul 2004 |
| 57 | Copestone Operating, LLC | Houston, TX 77019 | Oil & Gas Operator | May 2025 |
| 58 | D.C. Oil | Natalia, TX 78059 | Oil Operator | May 2025 |
| 59 | Devon Energy Corp (Nevada) | Oklahoma City, OK 73102 | Oil & Gas Operator | Feb 2017 |
| 60 | Discorbis Oil Company | San Antonio, TX 78217 | Oil & Gas Operator | Jul 2019 |
| 61 | Dodson, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Oct 1998 |
| 62 | Doege, Donald | La Vernia, TX 78121 | Oil & Gas Operator | May 2025 |
| 63 | Donoco Oil Company | La Vernia, TX 78121 | Oil & Gas Operator | May 2025 |
| 64 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Oct 2013 |
| 65 | Downing Well Service, Inc. | Devine, TX 78016 | Oil & Gas Operator | May 2025 |
| 66 | Drachen Oil Company | San Antonio, TX 78258 | Oil & Gas Operator | May 2025 |
| 67 | DRS Exploration Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 1999 |
| 68 | E.A.T.E. Operating | Natalia, TX 78059 | Oil & Gas Operator | May 2025 |
| 69 | Eise Oil, Inc. | San Antonio, TX 78213 | Oil Operator | May 2025 |
| 70 | Eldorado Oil And Gas, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Nov 1995 |
| 71 | Emerald Bay Energy, Inc. | San Antonio, TX 78230 | Oil Operator | May 2025 |
| 72 | Empire Oil Of New Jersey | Post, TX 79356 | Oil & Gas Operator | Jan 1999 |
| 73 | Escondido Operating, Inc. | Carrollton, TX 75011 | Oil & Gas Operator | Jun 2013 |
| 74 | Esenjay Petroleum Corp. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jul 1998 |
| 75 | Evans, Ralph | San Antonio, TX 78209 | Oil & Gas Operator | Jan 2011 |
| 76 | Everett Oil | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2015 |
| 77 | Everett Oil, Inc. | San Antonio, TX 78258 | Oil Operator | May 2025 |
| 78 | Export Petroleum Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | May 2025 |
| 79 | Fuego Energy, LLC | Fort Worth, TX 76136 | Oil Operator | May 2025 |
| 80 | Genie Oil Company | Devine, TX 78016 | Oil & Gas Operator | May 2025 |
| 81 | Genie Oil Company "A" | Devine, TX 78016 | Oil Operator | Dec 2021 |
| 82 | Ginco Operating Co. | San Antonio, TX 78217 | Oil & Gas Operator | May 2025 |
| 83 | Gonzalez, Eugene Jr | Atascosa, TX 78002 | Oil Operator | May 2025 |
| 84 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 85 | Great Plains Resources, Inc. | Nixon, TX 78140 | Oil & Gas Operator | May 2025 |
| 86 | H. & J. Drilling Company | Fort Worth, TX 76114 | Oil & Gas Operator | Aug 2003 |
| 87 | Haggard Operating Group/Oil | Atascosa, TX 78002 | Oil & Gas Operator | May 2025 |
| 88 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | May 2025 |
| 89 | Hardwick, Ross H. Oil Company | Devine, TX 78016 | Oil & Gas Operator | May 2025 |
| 90 | Harmony Drilling Company, Inc. | Denver, CO 80222 | Oil & Gas Operator | Nov 2016 |
| 91 | Hereford, J. A. Industries, Inc. | Nacogdoches, TX 75961 | Oil & Gas Operator | May 2025 |
| 92 | Hollub, Lambert Drilling Company | Seguin, TX 78155 | Oil & Gas Operator | May 2025 |
| 93 | Hufo Production Corporation | Midland, TX 79702 | Oil & Gas Operator | Jul 2002 |
| 94 | Hughes, Dan A. Company, L.P. | Beeville, TX 78104 | Oil & Gas Operator | May 2025 |
| 95 | J-Bar Oil Company | Somerset, TX 78069 | Oil & Gas Operator | Nov 2011 |
| 96 | J-Energy | La Vernia, TX 78121 | Oil & Gas Operator | May 2017 |
| 97 | Jamco Oil | Somerset, TX 78069 | Oil Operator | May 2025 |
| 98 | James, J. W. | Somerset, TX 78069 | Oil & Gas Operator | Aug 2004 |
| 99 | JB Oil & Gas Well Service | Dilley, TX 78017 | Oil & Gas Operator | May 2025 |
| 100 | JM Calk Operating, LLC | Lytle, TX 78052 | Oil Operator | May 2025 |