| 1 | 3-C Oil Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | Nov 2002 |
| 2 | 3-L Drilling | Abilene, TX 79605 | Oil & Gas Operator | May 2025 |
| 3 | 84 Energy LLC | Sugar Land, TX 77487 | Oil & Gas Operator | May 2025 |
| 4 | Advantagewon Oil, Us, Corp. | Batson, TX 77519 | Oil Operator | Dec 2019 |
| 5 | Agape Energy Inc. | San Antonio, TX 78280 | Oil Operator | May 2025 |
| 6 | Alcor Energy, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | May 2025 |
| 7 | Alcorn Energy, L.L.C. | Woodway, TX 76712 | Oil Operator | May 2025 |
| 8 | Allen & Grace Oil Company | Kingsbury, TX 78638 | Oil & Gas Operator | Jul 1997 |
| 9 | Alpha Omega Petroleum, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Mar 1996 |
| 10 | American Cascade Energy, Inc. | Barker, TX 77413 | Oil & Gas Operator | May 2025 |
| 11 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 12 | Armidillo Oil Company | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 13 | Aruba Petroleum, LTD. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 14 | Asante Operating Company, LLC | Austin, TX 78703 | Oil Operator | May 2025 |
| 15 | Austin Operating, LLC. | Chicago, IL 60622 | Oil Operator | May 2025 |
| 16 | Austral Oil Company Incorporated | Sulphur, LA 70663 | Oil & Gas Operator | Mar 2008 |
| 17 | Avian Tech International, Inc. | Euless, TX 76040 | Oil & Gas Operator | Apr 1995 |
| 18 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | May 2025 |
| 19 | B & M Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Dec 2011 |
| 20 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2025 |
| 21 | B. & L. Oil Company | Seguin, TX 78155 | Oil & Gas Operator | May 2025 |
| 22 | B. J. P. Operating | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 23 | B.O. Oil Company | Houston, TX 77089 | Oil & Gas Operator | May 2025 |
| 24 | Bailey, L. J. | Pleasanton, TX 78064 | Oil & Gas Operator | Jul 2003 |
| 25 | Bair'S Lease Service, Inc. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 26 | Base Petroleum | Houston, TX 77096 | Oil & Gas Operator | Jul 1994 |
| 27 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | May 2025 |
| 28 | Bear Of Texas, Inc. | Grand Rapids, MI 49546 | Oil & Gas Operator | Mar 2008 |
| 29 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 30 | Benchmark Texas Petroleum, LLC. | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 31 | Beta Oil Corporation | San Antonio, TX 78232 | Oil & Gas Operator | May 2025 |
| 32 | Big "6" Drilling Company | Houston, TX 77063 | Oil & Gas Operator | Mar 2019 |
| 33 | Blue Ridge Oil & Gas Exp., Inc. | Belleville, MI 48111 | Gas Operator | Jul 1994 |
| 34 | Blue River Inc. | Abilene, TX 79608 | Oil Operator | May 2025 |
| 35 | Bluebonnet Exploration Company | New Braunfels, TX 78130 | Oil & Gas Operator | Apr 2018 |
| 36 | Bob-Kat Oil Co. | Prairie Lea, TX 78661 | Oil & Gas Operator | May 2025 |
| 37 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 38 | Brac Oil | La Vernia, TX 78121 | Oil Operator | May 2025 |
| 39 | Brinkoeter Gas & Oil | Converse, TX 78109 | Oil & Gas Operator | Aug 2004 |
| 40 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 41 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 42 | C & H Energy LLC | Blue Mound, KS 66010 | Oil Operator | Nov 2009 |
| 43 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | May 2025 |
| 44 | Caddell Well Service, Inc. | Prairie Lea, TX 78661 | Oil & Gas Operator | May 2025 |
| 45 | Cal-Tex Exploration & Production Company LLC | San Antonio, TX 78228 | Oil & Gas Operator | May 2025 |
| 46 | Caltex Energy Co. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 47 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 48 | Cavalier Oil & Gas, Inc. | Buchanan Dam, TX 78609 | Oil & Gas Operator | May 2025 |
| 49 | Centex Pipe & Equipment, Inc. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 50 | Chaparral Natural Resources,Inc. | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 51 | Cheatham Well Service, Inc. | Luling, TX 78648 | Oil Operator | May 2025 |
| 52 | Cherry Oil & Gas | Luling, TX 78648 | Oil & Gas Operator | Dec 2000 |
| 53 | Chessher, Otto Drilling Company | Kearney, MO 64060 | Oil & Gas Operator | Dec 2013 |
| 54 | Chiodo Corp. | San Antonio, TX 78232 | Oil & Gas Operator | May 2025 |
| 55 | Circle-S Energy, LLC | McKinney, TX 75071 | Oil & Gas Operator | May 2025 |
| 56 | Civron Petroleum Res., LLC | San Antonio, TX 78229 | Oil & Gas Operator | May 2025 |
| 57 | CML Exploration, LLC | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 58 | Cobra Oil & Gas Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 59 | Coho Resources Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2002 |
| 60 | Colby Production Resources, LLC | Granbury, TX 76048 | Oil Operator | May 2025 |
| 61 | Cole, Frank W Engineering | Dallas, TX 75254 | Oil & Gas Operator | Mar 2006 |
| 62 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 63 | Comanche Well Service Corp. | Plano, TX 75093 | Oil & Gas Operator | May 2025 |
| 64 | Crossroads Mineral Prod., L.L.C. | Seguin, TX 78155 | Oil Operator | May 2025 |
| 65 | Crossroads Vacuum & Weld. Serv. | Luling, TX 78648 | Oil Operator | Mar 2010 |
| 66 | CT Adams Jr., LLC | Schulenburg, TX 78956 | Oil Operator | May 2025 |
| 67 | CTL Oil & Gas Corporation | Buchanan Dam, TX 78609 | Oil & Gas Operator | Nov 2020 |
| 68 | Darst Creek Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | Mar 2021 |
| 69 | Dartex Energy Corporation | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 70 | Davenport Oil Company | Luling, TX 78648 | Oil & Gas Operator | Dec 1996 |
| 71 | Delray Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 72 | Dinero Oil Corporation | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Nov 1999 |
| 73 | DJ Exploration, Inc. | San Antonio, TX 78257 | Oil & Gas Operator | May 2025 |
| 74 | Doege, Donald | La Vernia, TX 78121 | Oil & Gas Operator | May 2025 |
| 75 | Doege, Harry | La Vernia, TX 78121 | Oil & Gas Operator | Aug 2003 |
| 76 | Donoco Oil Company | La Vernia, TX 78121 | Oil & Gas Operator | May 2025 |
| 77 | E-P Oil Co. Inc. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 78 | E. T. Oil Company | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 79 | Eagle Ford Oil Co., Inc. | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 80 | Embrey Oil Production Co. | Sutherlnd SPG, TX 78161 | Oil & Gas Operator | Oct 2021 |
| 81 | Emerald Bay Energy, Inc. | San Antonio, TX 78230 | Oil Operator | May 2025 |
| 82 | Energon3 | Rowlett, TX 75089 | Oil Operator | May 2025 |
| 83 | Energy 2000, Inc. | Reno, NV 89501 | Oil & Gas Operator | May 2025 |
| 84 | Engelke, Randall Glen | Luling, TX 78648 | Oil & Gas Operator | Jul 2007 |
| 85 | Enhanced RS, Inc. | Luling, TX 78648 | Oil Operator | May 2025 |
| 86 | European-Southwest Co. | Houston, TX 77254 | Oil & Gas Operator | May 2025 |
| 87 | Evantech Energy Corp. | Fort Worth, TX 76120 | Oil & Gas Operator | Apr 1995 |
| 88 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 89 | F-B Oil, LP | Decatur, TX 76234 | Oil Operator | Aug 2015 |
| 90 | Five Star Energy, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Jan 2025 |
| 91 | Flournoy Production Co. | Alice, TX 78333 | Oil & Gas Operator | Dec 2002 |
| 92 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | May 2025 |
| 93 | Frank Louis L | Kingsville, TX 78364 | Oil & Gas Operator | Aug 2003 |
| 94 | Freestone Resources, Inc | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 95 | Fuego Energy, LLC | Fort Worth, TX 76136 | Oil Operator | May 2025 |
| 96 | G & F Oil, Inc. | Aledo, TX 76008 | Oil & Gas Operator | May 2025 |
| 97 | Galilee Oil Investments LLC | San Antonio, TX 78205 | Oil & Gas Operator | May 2025 |
| 98 | Garrison LTD. | San Antonio, TX 78257 | Oil & Gas Operator | May 2025 |
| 99 | Gauge Oil Company | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 100 | Geomeg Energy Operating Co., LLC | Aransas Pass, TX 78336 | Oil & Gas Operator | May 2025 |