| 1 | 2 D Oil & Gas LLC | Refugio, TX 78377 | Oil & Gas Operator | May 2025 |
| 2 | 3 W Investments LLC | San Antonio, TX 78217 | Oil & Gas Operator | May 2025 |
| 3 | 3-L Drilling | Abilene, TX 79605 | Oil & Gas Operator | May 2025 |
| 4 | 338 Oil & Gas, Inc. | Devine, TX 78016 | Oil Operator | Feb 2021 |
| 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 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 8 | Acock Engineering & Assoc., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2002 |
| 9 | Acock/Anaqua Operating Co., LC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2004 |
| 10 | Acock/Anaqua Operating Co., LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2025 |
| 11 | Acorn Oil & Gas, LLC | Iraan, TX 79744 | Oil & Gas Operator | May 2025 |
| 12 | Activa Resources, LLC | San Antonio, TX 78205 | Oil & Gas Operator | May 2025 |
| 13 | Agape Energy Inc. | San Antonio, TX 78280 | Oil Operator | May 2025 |
| 14 | Alcor Energy, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | May 2025 |
| 15 | Allegro Investments, Inc. | Victoria, TX 77903 | Oil & Gas Operator | Nov 2020 |
| 16 | Allen & Shumate, Inc. | Alice, TX 78333 | Oil & Gas Operator | Jan 1996 |
| 17 | Alvarado 2014 LLC | Houston, TX 77027 | Oil & Gas Operator | May 2025 |
| 18 | American Coastal Energy, Inc. | Houston, TX 77225 | Oil & Gas Operator | May 2008 |
| 19 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 20 | American Eagle Resources, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | May 2025 |
| 21 | Americo Energy Resources, LLC | Houston, TX 77063 | Oil & Gas Operator | May 2025 |
| 22 | Aminex USA, Inc. | Somerset, TX 78069 | Oil & Gas Operator | May 2018 |
| 23 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 24 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | May 2025 |
| 25 | Anaqua Oil & Gas, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2008 |
| 26 | Andrews & Corkran, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Feb 2000 |
| 27 | Aop Operating Corporation | Dallas, TX 75313 | Oil & Gas Operator | Aug 2003 |
| 28 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 29 | Arabie, Inc. | Lake Charles, LA 70605 | Oil & Gas Operator | May 2025 |
| 30 | Arben Oil, Inc. | Coleman, TX 76834 | Oil & Gas Operator | May 2025 |
| 31 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 32 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Sep 2021 |
| 33 | Arrow S Energy Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 34 | Ashby, Andrew M. | Golden, CO 80401 | Oil & Gas Operator | Jul 1998 |
| 35 | Atascosa Exploration, LLC | San Antonio, TX 78209 | Oil Operator | Apr 2020 |
| 36 | Atlas Eagle Ford Oper Co, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | May 2020 |
| 37 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 38 | Atnipp, H. L. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 39 | Aurora USA Development, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2014 |
| 40 | Avighna Energy Inc | Sugar Land, TX 77487 | Oil & Gas Operator | Jan 2019 |
| 41 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | May 2025 |
| 42 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2025 |
| 43 | Bailey, L. J. | Pleasanton, TX 78064 | Oil & Gas Operator | Jul 2003 |
| 44 | Bar V Energy LLC | Poteet, TX 78065 | Oil Operator | May 2025 |
| 45 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 46 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | May 2025 |
| 47 | Baylor Operating, LLC | Austin, TX 78766 | Oil & Gas Operator | May 2025 |
| 48 | Bayshore Operating Co. | Ingleside, TX 78362 | Oil & Gas Operator | Mar 2009 |
| 49 | Bayshore Operating Corp., L.L.C. | Luling, TX 78648 | Oil Operator | May 2025 |
| 50 | Baytex USA Development, LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2017 |
| 51 | BB-Southtex, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2024 |
| 52 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | May 2025 |
| 53 | Bellows, Dewey Oper. Co., LTD. | Refugio, TX 78377 | Oil & Gas Operator | Jul 2013 |
| 54 | Bering Operating Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | May 2001 |
| 55 | Beta Oil Corporation | San Antonio, TX 78232 | Oil & Gas Operator | May 2025 |
| 56 | Bigfoot Oil LLC | Denver, CO 80206 | Oil Operator | May 2025 |
| 57 | Bishop Petroleum Inc. | Houston, TX 77007 | Oil & Gas Operator | May 2025 |
| 58 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | May 2025 |
| 59 | Black Jack Well Service, Inc. | Somerset, TX 78069 | Oil & Gas Operator | Aug 2003 |
| 60 | Black Sable Energy, LLC | San Antonio, TX 78209 | Oil Operator | Jan 2018 |
| 61 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 62 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | May 2025 |
| 63 | Blackjack Operating L. L. C. | Schertz, TX 78154 | Oil & Gas Operator | May 2025 |
| 64 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 65 | Bledsoe, R.K. Trust Oil Operator | Jourdanton, TX 78026 | Oil & Gas Operator | May 2025 |
| 66 | Blue Quail Oil Co. | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 67 | Blue Star Energy, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | May 2025 |
| 68 | Bodden Production | Poth, TX 78147 | Oil & Gas Operator | May 2025 |
| 69 | Bommer Engineering Co. | San Antonio, TX 78260 | Oil & Gas Operator | May 2025 |
| 70 | Brayton Oil Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Dec 1994 |
| 71 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 72 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 73 | Britanco, L.L.C. | Falls City, TX 78113 | Oil & Gas Operator | May 2025 |
| 74 | Brothers Production Company Inc. | Midland, TX 79708 | Oil & Gas Operator | May 2025 |
| 75 | Brymer Contracting Incorporated | Pleasanton, TX 78064 | Oil & Gas Operator | May 2025 |
| 76 | Brymer, Jack Contr. Serv. | George West, TX 78022 | Oil Operator | May 2025 |
| 77 | Buccaneer Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 78 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 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 | May 2025 |
| 81 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 82 | Butler, Kevin O. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 83 | Butler, Kevin O. & Assoc., Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 84 | C&C II | Pleasanton, TX 78064 | Oil & Gas Operator | Mar 1998 |
| 85 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Feb 2025 |
| 86 | Cal Oil Company | Missouri City, TX 77459 | Oil Operator | May 2022 |
| 87 | Calame, Richard | Devine, TX 78016 | Oil Operator | May 2025 |
| 88 | Calfas Cattle & Oil, LLC | San Antonio, TX 78205 | Oil & Gas Operator | May 2025 |
| 89 | Calfas Oil, LLC | San Antonio, TX 78205 | Oil Operator | May 2025 |
| 90 | Calk Oil Company | Lytle, TX 78052 | Oil Operator | May 2025 |
| 91 | Calk Operating, LLC | Lytle, TX 78052 | Oil Operator | May 2025 |
| 92 | Calk, Roger D. | Lytle, TX 78052 | Oil & Gas Operator | May 2025 |
| 93 | Callon (Eagle Ford) LLC | Houston, TX 77042 | Oil & Gas Operator | Jun 2023 |
| 94 | Caltex Energy Co. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 95 | Cap Operating Inc. | Borger, TX 79008 | Oil & Gas Operator | May 2025 |
| 96 | Capital Star Oil & Gas, Inc. | Houston, TX 77027 | Oil & Gas Operator | May 2025 |
| 97 | Carrizo (Eagle Ford) LLC | Houston, TX 77042 | Oil & Gas Operator | Jan 2020 |
| 98 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 99 | Cashco Oil Company | Houston, TX 77024 | Oil & Gas Operator | Aug 2003 |
| 100 | Casias Oil Well Service, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Jul 2020 |