| 1 | 1776 Energy Operators, LLC | Houston, TX 77070 | Oil & Gas Operator | Mar 2025 |
| 2 | 1836 Resources, LLC | Houston, TX 77070 | Oil & Gas Operator | Aug 2019 |
| 3 | 2 D Oil & Gas LLC | Refugio, TX 78377 | Oil & Gas Operator | Mar 2025 |
| 4 | A & D Exploration Company | Rockport, TX 78381 | Oil & Gas Operator | Mar 2025 |
| 5 | A.O.E. Operators, Inc. | Fulshear, TX 77441 | Oil & Gas Operator | Mar 2025 |
| 6 | Abaco Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2025 |
| 7 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Mar 2025 |
| 8 | Ac Exploration, LLC | Houston, TX 77024 | Oil & Gas Operator | Mar 2025 |
| 9 | Acock Operating Limited | San Antonio, TX 78270 | Oil & Gas Operator | Mar 2025 |
| 10 | Acock/Anaqua Operating Co., LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |
| 11 | Activa Resources, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2008 |
| 12 | Aegis Fluids Management, LLC | Plano, TX 75093 | Oil & Gas Operator | Mar 2025 |
| 13 | Alamo Operating Company, L. C. | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2023 |
| 14 | Alcorn Prod Co. | Victoria, TX 77902 | Oil & Gas Operator | Mar 1997 |
| 15 | Alltex Exploration, Inc. | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 16 | Alpine Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 17 | Amend Energy Company | Houston, TX 77227 | Oil & Gas Operator | Apr 2002 |
| 18 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 19 | American Cometra, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2008 |
| 20 | American Int'L Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 21 | American Pumping & Trucking | New Braunfels, TX 78131 | Oil & Gas Operator | Mar 2025 |
| 22 | American Shoreline, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |
| 23 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Mar 2025 |
| 24 | Anaqua Oil & Gas, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2008 |
| 25 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Mar 2025 |
| 26 | Apex Energy, Inc. | Corpus Chrsti, TX 78413 | Oil & Gas Operator | Mar 2025 |
| 27 | Aransas DRLG & Workover Co Inc | Corpus Chrsti, TX 78409 | Oil & Gas Operator | Jul 2019 |
| 28 | Araxas Exploration, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 1998 |
| 29 | Arcadia Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Mar 2025 |
| 30 | Arch Oil & Gas, LLC | Dallas, TX 75254 | Oil & Gas Operator | Mar 2025 |
| 31 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 32 | Arcturus Operating Company | Addison, TX 75001 | Oil & Gas Operator | Mar 2025 |
| 33 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 34 | Arrington Oil&Gas Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 35 | Arrington,David H. Oil & Gas,Inc | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 36 | Asher Resources | Boerne, TX 78006 | Oil & Gas Operator | May 2015 |
| 37 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 38 | Atkinson Energy Corporation | Giddings, TX 78942 | Oil & Gas Operator | Jan 2010 |
| 39 | Atlantis Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Mar 2025 |
| 40 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 41 | Auburn Enterprises, Inc. | Kyle, TX 78640 | Oil & Gas Operator | Aug 2003 |
| 42 | Aurora Resources Corporation | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |
| 43 | Austin Resources Corporation | Houston, TX 77027 | Oil & Gas Operator | Mar 2008 |
| 44 | Austin Resources Oper Company | Houston, TX 77019 | Gas Operator | Mar 1999 |
| 45 | Awp Operating Company | George West, TX 78022 | Oil & Gas Operator | Mar 2025 |
| 46 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Mar 2025 |
| 47 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Mar 2025 |
| 48 | B.P. Productions Inc. | Victoria, TX 77904 | Oil & Gas Operator | Mar 2025 |
| 49 | Ballard Exploration Company,Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 50 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Mar 2025 |
| 51 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 52 | Baxter, Kelly H. Oil And Gas Co. | Austin, TX 78767 | Oil & Gas Operator | Nov 2010 |
| 53 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 54 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Mar 2025 |
| 55 | Baytex Energy USA, Inc. | Houston, TX 77084 | Oil & Gas Operator | Mar 2025 |
| 56 | BB-Southtex, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Oct 2024 |
| 57 | Beaver Oil & Gas Operating, LLC | Austin, TX 78746 | Oil & Gas Operator | Mar 2025 |
| 58 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Mar 2025 |
| 59 | Benchmark Texas Petroleum, LLC. | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 60 | Bepco, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2008 |
| 61 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 62 | Bexco Operating, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Mar 2025 |
| 63 | BHP Billiton Pet(Txla Op) Co | Denver, CO 80202 | Oil & Gas Operator | Jul 2019 |
| 64 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 65 | Big Lake Corporation | Dallas, TX 75222 | Oil & Gas Operator | Mar 2025 |
| 66 | Big Shell Oil & Gas, Inc. | Taft, TX 78390 | Oil & Gas Operator | Mar 2025 |
| 67 | Big Sky Energy, LLC | Cody, WY 82414 | Oil & Gas Operator | May 2024 |
| 68 | Black Gold Energy LLC | Jenks, OK 74037 | Oil Operator | Jun 2024 |
| 69 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 70 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Mar 2025 |
| 71 | Block "T" Petroleum, Inc. | Tyler, TX 75707 | Oil & Gas Operator | Mar 2025 |
| 72 | Blue Wing Energy, Inc. | Portland, TX 78374 | Oil & Gas Operator | Mar 2025 |
| 73 | BNP Petroleum Corporation | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Mar 2025 |
| 74 | Bopco, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 75 | Bowman, Fred Inc. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2014 |
| 76 | Boyd & McWilliams Energy Group | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 77 | BP Products North America Inc | Chicago, IL 60606 | Gas Operator | Jan 2017 |
| 78 | BPX Operating Company | Denver, CO 80202 | Oil & Gas Operator | Mar 2025 |
| 79 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2024 |
| 80 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 81 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2025 |
| 82 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 83 | Bronco Z Production | San Antonio, TX 78217 | Oil & Gas Operator | Jul 1998 |
| 84 | Brooklyn Union Explor. Co., Inc. | Houston, TX 77010 | Oil & Gas Operator | Jan 1994 |
| 85 | Brown, Geo. R Partnership,LP,The | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 86 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 87 | Buffco Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 88 | Bulldog Exploration, LP | Houston, TX 77090 | Oil & Gas Operator | Apr 2011 |
| 89 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Mar 2025 |
| 90 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 91 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 92 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | Mar 2025 |
| 93 | C.F.O., Inc. | Liberty, TX 77575 | Oil Operator | Mar 2025 |
| 94 | Cambrian Management LTD | McCaulley, TX 79534 | Oil & Gas Operator | Mar 2025 |
| 95 | Camden Resources, Inc. | Farmers BRNCH, TX 75234 | Oil & Gas Operator | Apr 2008 |
| 96 | Camden Resources, LLC | Blanchard, OK 73010 | Oil & Gas Operator | Dec 2015 |
| 97 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 98 | Camoil, Inc. | Columbus, TX 78934 | Oil & Gas Operator | Mar 2025 |
| 99 | Cannan, Morris | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2025 |
| 100 | Cantera Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2017 |