| 1 | 100 C & H Oil And Gas, LLC | San Antonio, TX 78248 | Oil Operator | May 2024 |
| 2 | 1776 Energy Operators, LLC | Houston, TX 77070 | Oil & Gas Operator | May 2024 |
| 3 | 2 D Oil & Gas LLC | Refugio, TX 78377 | Oil & Gas Operator | May 2024 |
| 4 | 3 W Investments LLC | San Antonio, TX 78217 | Oil & Gas Operator | May 2024 |
| 5 | 3-L Drilling | Abilene, TX 79605 | Oil & Gas Operator | May 2024 |
| 6 | 3-M Energy Corporation | San Angelo, TX 76902 | Oil & Gas Operator | Jun 2017 |
| 7 | Aaronmark Services, LLC | New Braunfels, TX 78130 | Oil Operator | May 2024 |
| 8 | Abernathy Auto, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2024 |
| 9 | Acock Engineering & Assoc., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2002 |
| 10 | Acock Operating Limited | San Antonio, TX 78270 | Oil & Gas Operator | May 2024 |
| 11 | Acorn Oil & Gas, Inc. | Orchard, TX 77464 | Oil Operator | Sep 2017 |
| 12 | Activa Resources, LLC | San Antonio, TX 78205 | Oil & Gas Operator | May 2024 |
| 13 | Agape Energy Inc. | San Antonio, TX 78280 | Oil Operator | May 2024 |
| 14 | Ageron Energy, LLC | San Antonio, TX 78209 | Oil & Gas Operator | May 2024 |
| 15 | Alamo Operating Company, L. C. | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2023 |
| 16 | Alaron Energy, Inc. | Irving, TX 75038 | Oil & Gas Operator | May 2024 |
| 17 | Alco DRLG. Co. | Freer, TX 78357 | Oil & Gas Operator | May 2024 |
| 18 | Altair Energy Corp. | Tyler, TX 75702 | Oil & Gas Operator | Jun 1994 |
| 19 | Alvarado 2014 LLC | Houston, TX 77027 | Oil & Gas Operator | May 2024 |
| 20 | Amac Energy, L.L.C. | The Woodlands, TX 77381 | Oil & Gas Operator | May 2024 |
| 21 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 22 | Ambassador Petroleum, Inc. | Katy, TX 77494 | Oil & Gas Operator | May 2024 |
| 23 | Amcon Resources, Inc. | Oklahoma City, OK 73101 | Gas Operator | Jun 2016 |
| 24 | American Eagle Resources, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | May 2024 |
| 25 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | May 2024 |
| 26 | Anadarko E&P Company LP | Houston, TX 77251 | Oil & Gas Operator | Aug 2014 |
| 27 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jan 2024 |
| 28 | Aop Operating Corporation | Dallas, TX 75313 | Oil & Gas Operator | Aug 2003 |
| 29 | Apache Corporation | Houston, TX 77056 | Oil & Gas Operator | May 2024 |
| 30 | Arcadia Expl. & Prod. Company | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2011 |
| 31 | Arete Operating Company, LLC | Austin, TX 78746 | Oil & Gas Operator | May 2024 |
| 32 | Arpel, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2014 |
| 33 | Arrco Operating, LLC | Carrizo SPGS, TX 78834 | Oil & Gas Operator | May 2024 |
| 34 | Arrow Exploration Company | Plano, TX 75075 | Oil & Gas Operator | Dec 2004 |
| 35 | Ashby, Andrew M. | Golden, CO 80401 | Oil & Gas Operator | Jul 1998 |
| 36 | Asher Resources | Boerne, TX 78006 | Oil & Gas Operator | May 2015 |
| 37 | Ashtola Exploration Company,Inc. | Amarillo, TX 79105 | Oil & Gas Operator | May 2024 |
| 38 | Atlas Energy Corporation (Del.) | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2024 |
| 39 | Auburn Enterprises, Inc. | Kyle, TX 78640 | Oil & Gas Operator | Aug 2003 |
| 40 | Av-Tech Resources Corporation | Kerrville, TX 78028 | Oil & Gas Operator | Jul 2022 |
| 41 | Avighna Energy Inc | Sugar Land, TX 77487 | Oil & Gas Operator | Jan 2019 |
| 42 | Awp Operating Company | George West, TX 78022 | Oil & Gas Operator | May 2024 |
| 43 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | May 2024 |
| 44 | Barbee, R.L. Operating, Inc. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | May 2024 |
| 45 | Barnes, Larry Petroleum, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Jul 1996 |
| 46 | Barnett Energy, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2024 |
| 47 | Baron Energy Inc. | San Marcos, TX 78666 | Oil & Gas Operator | May 2024 |
| 48 | Basa Resources Inc | Dallas, TX 75254 | Oil & Gas Operator | May 2024 |
| 49 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | May 2024 |
| 50 | Baxter, Kelly H. | Austin, TX 78767 | Oil & Gas Operator | Mar 2008 |
| 51 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 52 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 53 | Baylor Operating, LLC | San Antonio, TX 78217 | Oil & Gas Operator | May 2024 |
| 54 | Bayshore Operating Co. | Ingleside, TX 78362 | Oil & Gas Operator | Mar 2009 |
| 55 | Bayshore Operating Corp., L.L.C. | Luling, TX 78648 | Oil Operator | May 2024 |
| 56 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | May 2024 |
| 57 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | May 2024 |
| 58 | Benchmark Texas Petroleum, LLC. | Tulsa, OK 74103 | Oil & Gas Operator | May 2024 |
| 59 | Bend Petroleum Corp | Muenster, TX 76252 | Oil & Gas Operator | May 2024 |
| 60 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Mar 2024 |
| 61 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 62 | Bigfoot Oil LLC | Denver, CO 80206 | Oil Operator | May 2024 |
| 63 | Black Sable Energy, LLC | San Antonio, TX 78209 | Oil Operator | Jan 2018 |
| 64 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 65 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | May 2024 |
| 66 | Bledsoe, R.K. Trust Oil Operator | Jourdanton, TX 78026 | Oil & Gas Operator | May 2024 |
| 67 | Block "T" Petroleum, Inc. | Tyler, TX 75710 | Oil & Gas Operator | May 2024 |
| 68 | Block T Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2023 |
| 69 | Boling Production Company, Inc. | Boling, TX 77420 | Oil & Gas Operator | May 2024 |
| 70 | Botasch Operating, LLC | Dilley, TX 78017 | Oil & Gas Operator | May 2024 |
| 71 | BP Products North America Inc | Houston, TX 77094 | Gas Operator | Jan 2017 |
| 72 | Brayton Oil Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Dec 1994 |
| 73 | Brazos Petroleum, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2024 |
| 74 | BRC Operating Company LLC | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 75 | Britanco, L.L.C. | Falls City, TX 78113 | Oil & Gas Operator | May 2024 |
| 76 | Brown Tom Inc | Dallas, TX 75240 | Oil & Gas Operator | Mar 2015 |
| 77 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 78 | Brymer Contracting Incorporated | Pleasanton, TX 78064 | Oil & Gas Operator | May 2024 |
| 79 | Brymer, Jack Contr. Serv. | George West, TX 78022 | Oil Operator | May 2024 |
| 80 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | May 2024 |
| 81 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 82 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | May 2024 |
| 83 | Bush, Mark A. Oil And Gas Inc. | Houston, TX 77057 | Oil & Gas Operator | May 2024 |
| 84 | C And S Oil & Gas | San Antonio, TX 78217 | Oil & Gas Operator | Feb 1998 |
| 85 | C Oil Co. | New Braunfels, TX 78132 | Oil & Gas Operator | Feb 2017 |
| 86 | C&C II | Pleasanton, TX 78064 | Oil & Gas Operator | Mar 1998 |
| 87 | C.F.O., Inc. | Liberty, TX 77575 | Oil Operator | May 2024 |
| 88 | C6 Operating, L.L.C. | Keatchie, LA 71046 | Oil & Gas Operator | May 2024 |
| 89 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2024 |
| 90 | Cactus Jack Operating Company | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Aug 2003 |
| 91 | Cag Petroleum Corp. | Dallas, TX 75382 | Oil & Gas Operator | May 2024 |
| 92 | Cal Oil Company | Missouri City, TX 77459 | Oil Operator | May 2022 |
| 93 | Callon (Eagle Ford) LLC | Houston, TX 77042 | Oil & Gas Operator | Jun 2023 |
| 94 | Caltex Energy Co. | Luling, TX 78648 | Oil & Gas Operator | May 2024 |
| 95 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | May 2024 |
| 96 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 97 | Cannan, Morris | San Antonio, TX 78205 | Oil & Gas Operator | May 2024 |
| 98 | Cantro Exploration, Inc. | San Antonio, TX 78270 | Oil & Gas Operator | May 2000 |
| 99 | Capitol Operating & Expl., Inc. | Austin, TX 78766 | Oil & Gas Operator | Feb 2001 |
| 100 | Caprock Exploration, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Feb 2024 |