| 1 | 1776 Energy Operators, LLC | Houston, TX 77070 | Oil & Gas Operator | Apr 2024 |
| 2 | 3 W Investments LLC | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 3 | 3-L Drilling | Abilene, TX 79605 | Oil & Gas Operator | Apr 2024 |
| 4 | 3R-B Oil Venture | Luling, TX 78648 | Oil & Gas Operator | Feb 2012 |
| 5 | A & C Oil Company, LLC | Stockdale, TX 78160 | Oil Operator | Apr 2024 |
| 6 | Aaronmark Services, LLC | New Braunfels, TX 78130 | Oil Operator | Apr 2024 |
| 7 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2024 |
| 8 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 9 | Adela Oil | Seguin, TX 78155 | Oil & Gas Operator | Jun 2000 |
| 10 | Advantagewon Oil, Us, Corp. | Batson, TX 77519 | Oil Operator | Dec 2019 |
| 11 | Aerie Energy | Cedar Creek, TX 78612 | Oil Operator | Apr 2024 |
| 12 | Agape Energy Inc. | San Antonio, TX 78280 | Oil Operator | Apr 2024 |
| 13 | Alamo Operating Company, L. C. | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2023 |
| 14 | Alcor Energy, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Apr 2024 |
| 15 | Alcorn Energy, L.L.C. | Woodway, TX 76712 | Oil Operator | Apr 2024 |
| 16 | Alcorn Prod Co. | Victoria, TX 77902 | Oil & Gas Operator | Mar 1997 |
| 17 | Alltex Exploration, Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 18 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Apr 2024 |
| 19 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 20 | Andrews & Corkran, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Feb 2000 |
| 21 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | Apr 2024 |
| 22 | Arben Oil, Inc. | Coleman, TX 76834 | Oil & Gas Operator | Apr 2024 |
| 23 | Argent Energy (Us) Holdings Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Feb 2023 |
| 24 | Arriola Operating & Consltg Inc. | Dallas, TX 75248 | Oil Operator | Apr 2024 |
| 25 | Auburn Enterprises, Inc. | Kyle, TX 78640 | Oil & Gas Operator | Aug 2003 |
| 26 | Austin Energy Operations, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Apr 2024 |
| 27 | Autry, Martin | Seguin, TX 78155 | Oil Operator | Apr 2024 |
| 28 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Apr 2024 |
| 29 | B & M Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Dec 2011 |
| 30 | Barnes, Larry Petroleum, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Jul 1996 |
| 31 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 32 | Bastrop Energy Group | San Antonio, TX 78231 | Oil & Gas Operator | Apr 2024 |
| 33 | Battlecat Operating Company, LLC | Houston, TX 77082 | Oil & Gas Operator | Jul 2019 |
| 34 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 35 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 36 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 37 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 38 | Bayshore Operating Co. | Ingleside, TX 78362 | Oil & Gas Operator | Mar 2009 |
| 39 | Bayshore Operating Corp., L.L.C. | Luling, TX 78648 | Oil Operator | Apr 2024 |
| 40 | Baytex Energy USA, Inc. | Houston, TX 77084 | Oil & Gas Operator | Apr 2024 |
| 41 | Bear Of Texas, Inc. | Grand Rapids, MI 49546 | Oil & Gas Operator | Mar 2008 |
| 42 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 43 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Apr 2024 |
| 44 | Bellows, Dewey Oper. Co., LTD. | Refugio, TX 78377 | Oil & Gas Operator | Jul 2013 |
| 45 | Benson-Wyatt Oil Co. Inc. | Austin, TX 78767 | Oil & Gas Operator | Jul 2003 |
| 46 | Big Shell Oil & Gas, Inc. | Taft, TX 78390 | Oil & Gas Operator | Apr 2024 |
| 47 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Apr 2024 |
| 48 | Black Jack Well Service, Inc. | Somerset, TX 78069 | Oil & Gas Operator | Aug 2003 |
| 49 | Blackjack Operating L. L. C. | Schertz, TX 78154 | Oil Operator | Apr 2024 |
| 50 | Bluco Production Co., Inc. | Austin, TX 78716 | Oil & Gas Operator | Apr 2024 |
| 51 | Blue River Inc. | Abilene, TX 79608 | Oil Operator | Apr 2024 |
| 52 | BNP Petroleum Corporation | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Apr 2024 |
| 53 | Bodden Production | Poth, TX 78147 | Oil & Gas Operator | Apr 2024 |
| 54 | Bommer Engineering Co. | San Antonio, TX 78260 | Oil & Gas Operator | Apr 2024 |
| 55 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 56 | BP Products North America Inc | Houston, TX 77094 | Gas Operator | Jan 2017 |
| 57 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 58 | Brinkoeter Gas & Oil | Converse, TX 78109 | Oil & Gas Operator | Aug 2004 |
| 59 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 60 | Britanco, L.L.C. | Falls City, TX 78113 | Oil & Gas Operator | Apr 2024 |
| 61 | Bulldog Exploration, LP | Houston, TX 77090 | Oil & Gas Operator | Apr 2011 |
| 62 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 63 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 64 | BXP Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Apr 2024 |
| 65 | C S J, Inc. | Austin, TX 78716 | Oil & Gas Operator | Apr 2024 |
| 66 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 67 | Caddell Well Service, Inc. | Prairie Lea, TX 78661 | Oil & Gas Operator | Apr 2024 |
| 68 | Caltex Energy Co. | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 69 | Cannan, Morris | San Antonio, TX 78205 | Oil & Gas Operator | Apr 2024 |
| 70 | Cantro Exploration, Inc. | San Antonio, TX 78270 | Oil & Gas Operator | May 2000 |
| 71 | Capps, R. Oil Corp. | Midland, TX 79704 | Oil & Gas Operator | Oct 2002 |
| 72 | Caprock Exploration, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Feb 2024 |
| 73 | Castillo Oil Company LLC | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 74 | Cei Operating LLC | Katy, TX 77449 | Oil & Gas Operator | Apr 2024 |
| 75 | Chesapeake Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2023 |
| 76 | Chisholm Oil & Gas, LC | Buda, TX 78610 | Oil & Gas Operator | Apr 2024 |
| 77 | Cibolo Energy Operating, Inc. | Bulverde, TX 78163 | Oil & Gas Operator | Apr 2024 |
| 78 | Cimarron Engineering Corp. | Kingsville, TX 78364 | Oil & Gas Operator | May 2015 |
| 79 | Cimarron Engineering, LLC | Kingsville, TX 78364 | Oil & Gas Operator | Apr 2024 |
| 80 | Clayton Williams Energy, Inc. | Houston, TX 77070 | Oil & Gas Operator | Apr 2017 |
| 81 | Cleantex Oilfield Services, LLC | Tyler, TX 75702 | Oil Operator | Apr 2024 |
| 82 | CLR Secondary Recovery, LLC | Mabank, TX 75147 | Oil & Gas Operator | Apr 2024 |
| 83 | Coastal Bend Petroleum Corp. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Dec 2002 |
| 84 | Coates Energy Trust | San Antonio, TX 78209 | Oil & Gas Operator | Aug 2008 |
| 85 | Colt Resources Corporation | Billings, MT 59103 | Oil & Gas Operator | Feb 2013 |
| 86 | Columbia Energy Properties, Inc. | Baytown, TX 77521 | Oil & Gas Operator | Jul 2004 |
| 87 | Columbia Gas Development Corp. | Houston, TX 77251 | Oil & Gas Operator | Jun 1996 |
| 88 | Consolidated Properties | Tulsa, OK 74129 | Oil & Gas Operator | Jan 2017 |
| 89 | Continental Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 90 | Convest Energy Corporation | Houston, TX 77057 | Oil & Gas Operator | Sep 2014 |
| 91 | Cooke Energy Company | San Antonio, TX 78250 | Oil & Gas Operator | Jul 2012 |
| 92 | Copperhead Oil & Gas, LTD. | San Antonio, TX 78209 | Oil & Gas Operator | Dec 2017 |
| 93 | Coquina Oil Corporation | Houston, TX 77227 | Oil & Gas Operator | Mar 2015 |
| 94 | Cory, Kenneth W. LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Apr 2024 |
| 95 | Costilla Energy Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 96 | Costilla Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 97 | Crossroads Mineral Prod., L.L.C. | Seguin, TX 78155 | Oil Operator | Apr 2024 |
| 98 | Crossroads Vacuum & Weld. Serv. | Luling, TX 78648 | Oil Operator | Mar 2010 |
| 99 | Cummins & Walker Oil Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Jan 2021 |
| 100 | CWS Aceite Operating, Inc. | Cotulla, TX 78014 | Oil & Gas Operator | Aug 2018 |