| 1 | 1836 Energy LLC | El Campo, TX 77437 | Oil Operator | Sep 2026 |
| 2 | 2S Resources LLC | Boerne, TX 78006 | Oil & Gas Operator | Jun 2025 |
| 3 | A T M Corporation | Mathis, TX 78368 | Oil & Gas Operator | Oct 2002 |
| 4 | Abaco Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2026 |
| 5 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Sep 2026 |
| 6 | Ace Productions | Beaumont, TX 77707 | Oil & Gas Operator | Sep 2026 |
| 7 | Acock Engineering & Assoc., Inc. | Corpus Christ, TX 78401 | Oil & Gas Operator | Jul 2002 |
| 8 | Acock Operating Limited | San Antonio, TX 78270 | Oil & Gas Operator | Sep 2026 |
| 9 | Acock/Anaqua Operating Co., LC | Corpus Christ, TX 78401 | Oil & Gas Operator | Apr 2004 |
| 10 | Acock/Anaqua Operating Co., LP | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 11 | Acoma Oil Corporation | Saint Paul, MN 55102 | Oil & Gas Operator | Sep 2026 |
| 12 | Alamo Operating Company, L. C. | San Antonio, TX 78278 | Oil & Gas Operator | Aug 2023 |
| 13 | Alcorn Prod Co. | Victoria, TX 77902 | Oil & Gas Operator | Mar 1997 |
| 14 | Aldine Oil And Gas, LP | Tomball, TX 77375 | Oil & Gas Operator | Sep 2026 |
| 15 | Alegre Energy, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2026 |
| 16 | Alexander Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 17 | Allegiant Resources, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Sep 2026 |
| 18 | Allegro Investments, Inc. | Victoria, TX 77903 | Oil & Gas Operator | Nov 2020 |
| 19 | Alta Mesa Services, LP | Houston, TX 77084 | Oil & Gas Operator | Sep 2026 |
| 20 | Amax Oil & Gas Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 21 | Ambassador Petroleum, Inc. | Katy, TX 77494 | Oil & Gas Operator | Sep 2026 |
| 22 | Amend Energy Company | Houston, TX 77227 | Oil & Gas Operator | Apr 2002 |
| 23 | American Coastal Energy, Inc. | Houston, TX 77225 | Oil & Gas Operator | May 2008 |
| 24 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 25 | American Int'L Energy Corp. | Houston, TX 77057 | Oil & Gas Operator | Aug 2019 |
| 26 | American Resources, Inc. | Houston, TX 77079 | Oil & Gas Operator | Sep 2026 |
| 27 | Ampak Oil Company | Plano, TX 75074 | Oil & Gas Operator | Sep 2026 |
| 28 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Sep 2026 |
| 29 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jun 2026 |
| 30 | Anaqua Oil & Gas, Inc. | Corpus Christ, TX 78401 | Oil & Gas Operator | Mar 2008 |
| 31 | Angel Operating LLC | Metairie, LA 70033 | Oil Operator | Sep 2026 |
| 32 | Antara Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2004 |
| 33 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Sep 2026 |
| 34 | API Operating Co. | Houston, TX 77036 | Oil & Gas Operator | Sep 2026 |
| 35 | Aquila Energy Resources Corp. | Houston, TX 77042 | Oil & Gas Operator | Nov 2013 |
| 36 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 37 | Arista Novelty, Inc. | Houston, TX 77256 | Oil & Gas Operator | Feb 1995 |
| 38 | Armour Resource Holdings, LTD. | Houston, TX 77046 | Oil & Gas Operator | Nov 1994 |
| 39 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 40 | Atasca Resources, Inc. | Houston, TX 77219 | Oil & Gas Operator | Sep 2026 |
| 41 | Atinum Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 42 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2026 |
| 43 | Aurora Resources Corporation | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 44 | Awp Operating Company | George West, TX 78022 | Oil & Gas Operator | Sep 2026 |
| 45 | B D Production Co., Inc. | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 46 | B.P. Productions Inc. | Victoria, TX 77904 | Oil & Gas Operator | Sep 2026 |
| 47 | B.W.O.C., Inc. | Plano, TX 75026 | Oil & Gas Operator | Sep 2026 |
| 48 | Barrett Brothers Oil & Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Dec 2020 |
| 49 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | Sep 2026 |
| 50 | Bass Enterprises Production Co | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2006 |
| 51 | Baxter, Murphy H. | Houston, TX 77002 | Oil & Gas Operator | Sep 1998 |
| 52 | Bay Rock Operating Company | San Antonio, TX 78212 | Oil & Gas Operator | Sep 2026 |
| 53 | Beach Exploration, Inc. | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 54 | Beard Oil Company, LLC | Edna, TX 77957 | Oil & Gas Operator | Sep 2026 |
| 55 | Big "6" Drilling Company | Houston, TX 77063 | Oil & Gas Operator | Mar 2019 |
| 56 | Big Creek Operating Company LLC | Houston, TX 77065 | Oil & Gas Operator | Sep 2026 |
| 57 | Bison Energy Partners, Inc. | Houston, TX 77060 | Oil & Gas Operator | Sep 2001 |
| 58 | Bison Energy Partners, LTD. | Houston, TX 77060 | Oil & Gas Operator | Apr 2002 |
| 59 | Black Draw Energy LLC | Cypress, TX 77433 | Oil & Gas Operator | Sep 2026 |
| 60 | Bluco Production Co., Inc. | Austin, TX 78716 | Oil & Gas Operator | Sep 2026 |
| 61 | Blue Wing Energy, Inc. | Portland, TX 78374 | Oil & Gas Operator | Sep 2026 |
| 62 | BNP Operating LLC | Corpus Chrsti, TX 78471 | Gas Operator | Jan 2015 |
| 63 | BNP Petroleum Corporation | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Sep 2026 |
| 64 | Boling Production Company, Inc. | Boling, TX 77420 | Oil & Gas Operator | Sep 2026 |
| 65 | Bonfire Operating LLC | Cresson, TX 76035 | Oil & Gas Operator | Sep 2026 |
| 66 | Borger Resources 4 LLC | Borger, TX 79007 | Oil & Gas Operator | Sep 2026 |
| 67 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Jun 2026 |
| 68 | Braman, D. H., Jr. | Victoria, TX 77901 | Oil & Gas Operator | Dec 2008 |
| 69 | Brayton Operating Corp. | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Sep 2009 |
| 70 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 71 | Breitburn Operating LP | Keithville, LA 71047 | Oil & Gas Operator | Sep 2026 |
| 72 | Bridge Oil Company LP | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 73 | Bridge Oil Production Co., Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 1993 |
| 74 | Brigham Oil & Gas, L.P. | Austin, TX 78730 | Oil & Gas Operator | Oct 2015 |
| 75 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 76 | Britnic Oil & Gas, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Sep 2026 |
| 77 | Brown, George R. Partnership,The | Houston, TX 77002 | Oil & Gas Operator | May 2006 |
| 78 | Bse Production Co. | Victoria, TX 77903 | Oil & Gas Operator | Sep 2026 |
| 79 | Buffalo Resources Co. | Rosenberg, TX 77471 | Oil & Gas Operator | Sep 2000 |
| 80 | Bull Operating, LLC | Houston, TX 77010 | Oil & Gas Operator | Sep 2026 |
| 81 | Burke, Harry Petroleum | Houston, TX 77080 | Oil & Gas Operator | Nov 2024 |
| 82 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Sep 2026 |
| 83 | Burlington Resources Oil And Gas Co. | Houston, TX 77210 | Oil & Gas Operator | Mar 2023 |
| 84 | BXP Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Sep 2026 |
| 85 | C & E Operating, Inc. | Hockley, TX 77447 | Oil & Gas Operator | Sep 2026 |
| 86 | Cactus Gas & Oil, Inc. | San Antonio, TX 78259 | Oil & Gas Operator | Sep 2026 |
| 87 | Calpine Natural Gas Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2002 |
| 88 | Calpine Natural Gas Company L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 89 | Calpine Natural Gas L.P. | Houston, TX 77002 | Oil & Gas Operator | Dec 2005 |
| 90 | Cameron, Paul E., Jr., Inc. | Montgomery, TX 77356 | Oil & Gas Operator | May 2015 |
| 91 | Camoil, Inc. | Columbus, TX 78934 | Oil & Gas Operator | Sep 2026 |
| 92 | Carlson Petroleum Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 93 | Carrizo Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 94 | Carter Exploration Company | Corpus Christ, TX 78413 | Oil & Gas Operator | Feb 2015 |
| 95 | Caskids Operating Company | Houston, TX 77027 | Oil & Gas Operator | Sep 2026 |
| 96 | Central Texas Operating, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2026 |
| 97 | Century Assets Corporation | Houston, TX 77056 | Oil Operator | Sep 2026 |
| 98 | Chaparral (USA) Energy, Inc. | Oklahoma City, OK 73114 | Oil & Gas Operator | Sep 2002 |
| 99 | Chaparral Energy, L.L.C. | Oklahoma City, OK 73142 | Oil & Gas Operator | Sep 2026 |
| 100 | Charolais Energy, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |