| 1 | A & A Oil Company | Luling, TX 78648 | Oil & Gas Operator | Oct 2009 |
| 2 | A & B Minerals | Scotland, TX 76379 | Oil & Gas Operator | Sep 2020 |
| 3 | A & B Oil | Monahans, TX 79756 | Oil & Gas Operator | Jul 2026 |
| 4 | A & B Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Apr 2015 |
| 5 | A & B Well Service Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Nov 2006 |
| 6 | A & C Oil Company, LLC | Stockdale, TX 78160 | Oil Operator | Jul 2026 |
| 7 | A & D Exploration Company | Rockport, TX 78381 | Oil & Gas Operator | Jul 2026 |
| 8 | A & E Minerals, LLC | Shreveport, LA 71104 | Oil & Gas Operator | Jul 2026 |
| 9 | A & G Oil Company, LLC | Barstow, TX 79719 | Oil & Gas Operator | Feb 2012 |
| 10 | A & G Producers, Inc. | Barstow, TX 79719 | Oil & Gas Operator | Jul 2026 |
| 11 | A & P Oil & Gas | Leona, TX 75850 | Oil Operator | Jul 2026 |
| 12 | A & T Oil Company | Midland, TX 79707 | Oil & Gas Operator | Sep 2008 |
| 13 | A - Z Operating LLC | Winters, TX 79567 | Oil Operator | Jul 2026 |
| 14 | A A Production Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 1998 |
| 15 | A C Operating Co. | Bangs, TX 76823 | Oil & Gas Operator | Mar 2008 |
| 16 | A D D Productions | Sweetwater, TX 79556 | Oil & Gas Operator | Jul 2019 |
| 17 | A E G Oil, Inc. | Hale Center, TX 79041 | Oil & Gas Operator | Jul 2026 |
| 18 | A J A Companies | Tyler, TX 75703 | Oil Operator | Jul 2026 |
| 19 | A J Myers Prod. LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Jul 2026 |
| 20 | A T M Corporation | Mathis, TX 78368 | Oil & Gas Operator | Oct 2002 |
| 21 | A&M Oil & Gas LLC | Kermit, TX 79745 | Oil & Gas Operator | Jul 2026 |
| 22 | A-E Operating Committee | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1996 |
| 23 | A-G-B, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2003 |
| 24 | A. Bauer, LLC | Red Rock, TX 78662 | Oil Operator | Jul 2026 |
| 25 | A. P. B. Petro | Winters, TX 79567 | Oil & Gas Operator | Oct 2005 |
| 26 | A.A.F. Production Co., Inc. | Abilene, TX 79606 | Oil & Gas Operator | Dec 1997 |
| 27 | A.C.T. Operating Company | Lubbock, TX 79401 | Oil & Gas Operator | Jul 2026 |
| 28 | A.D. Operating | Graham, TX 76450 | Oil & Gas Operator | Jul 2026 |
| 29 | A.D.A. Oil Co | Iowa Park, TX 76367 | Oil Operator | Aug 2003 |
| 30 | A.D.S. Resources, Inc. | Lubbock, TX 79413 | Oil & Gas Operator | Jul 2008 |
| 31 | A.E.N. Energy | Abilene, TX 79608 | Oil & Gas Operator | Feb 2005 |
| 32 | A.E.N. Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jan 1996 |
| 33 | A.O.E. Operators, Inc. | Fulshear, TX 77441 | Oil & Gas Operator | Jul 2026 |
| 34 | A2c Energy LLC | Lockhart, TX 78644 | Oil Operator | Jul 2026 |
| 35 | Aaa Oil Company | Castroville, TX 78009 | Oil & Gas Operator | Jul 2026 |
| 36 | Aardolie Oil Company | Dallas, TX 75370 | Oil & Gas Operator | Jul 2003 |
| 37 | Aaron & Jeter | Seminole, TX 79360 | Oil & Gas Operator | Jan 2003 |
| 38 | Aaronmark Services, LLC | New Braunfels, TX 78130 | Oil Operator | Jul 2026 |
| 39 | Ab Reserve, LLC | Rockdale, TX 76567 | Oil Operator | Jul 2026 |
| 40 | Aba Oil LLC | Burkburnett, TX 76354 | Oil Operator | Jul 2026 |
| 41 | Abaco Operating, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2026 |
| 42 | Abarta Oil & Gas Co., Inc. | Pittsburgh, PA 15238 | Oil & Gas Operator | Dec 2020 |
| 43 | Abb Oil Co., Inc. | Wichita Falls, TX 76310 | Oil & Gas Operator | Jul 2026 |
| 44 | Abbott, John Operating | Abilene, TX 79605 | Oil & Gas Operator | Jul 2026 |
| 45 | ABC NRG | Vernon, TX 76384 | Oil Operator | Jul 2026 |
| 46 | Abel Production Company | San Angelo, TX 76904 | Oil & Gas Operator | Sep 2000 |
| 47 | Abel, M.D. Co. | Lampasas, TX 76550 | Oil & Gas Operator | Jun 2017 |
| 48 | Aber Oil & Gas Co. | Tyler, TX 75702 | Oil & Gas Operator | Nov 2013 |
| 49 | Aberdeen Petroleum (USA) Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 1994 |
| 50 | Aberlour Operating Inc. | Pampa, TX 79066 | Oil & Gas Operator | Jul 2026 |
| 51 | Abernathy Auto, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jul 2026 |
| 52 | Abernathy Exploration Company | Abilene, TX 79608 | Oil & Gas Operator | Mar 2002 |
| 53 | Abilene American Energy, LLC | Abilene, TX 79602 | Oil Operator | Jul 2026 |
| 54 | Ableready, Inc. | Houston, TX 77269 | Oil & Gas Operator | Jul 2026 |
| 55 | Abraxas Petroleum Corporation | San Antonio, TX 78259 | Oil & Gas Operator | Jul 2026 |
| 56 | Abraxas Production Corporation | San Antonio, TX 78270 | Oil & Gas Operator | Sep 1999 |
| 57 | Abtex Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2006 |
| 58 | Abx Oil & Gas, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jul 2026 |
| 59 | Ac Exploration, LLC | Houston, TX 77024 | Oil & Gas Operator | Jul 2026 |
| 60 | Acadia Oil Company | Wichita Falls, TX 76309 | Oil & Gas Operator | Sep 2007 |
| 61 | Acadia Oil, LLC | Wichita Falls, TX 76310 | Oil Operator | Jul 2026 |
| 62 | Accell Natural Gas Company | Houston, TX 77042 | Oil & Gas Operator | Sep 1998 |
| 63 | Access Resources Inc. | Healdton, OK 73438 | Oil & Gas Operator | Sep 2005 |
| 64 | Acco Oil & Gas Company | Houston, TX 77056 | Oil & Gas Operator | Sep 2001 |
| 65 | Ace Energy LLC | Leawood, KS 66211 | Oil & Gas Operator | May 2026 |
| 66 | Ace Productions | Beaumont, TX 77707 | Oil & Gas Operator | Jul 2026 |
| 67 | Acierto Resources Company, LLC | Houston, TX 77070 | Oil & Gas Operator | Jul 2026 |
| 68 | Acirema Corporation | Longview, TX 75608 | Oil & Gas Operator | Jul 2026 |
| 69 | Ackerly Service Company, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Nov 1997 |
| 70 | Ackerman, Albert C. | Boerne, TX 78006 | Oil & Gas Operator | Oct 1995 |
| 71 | Acme Petroleum Co. | Gonzales, TX 78629 | Oil & Gas Operator | Mar 2008 |
| 72 | Acock Engineering & Assoc., Inc. | Corpus Christ, TX 78401 | Oil & Gas Operator | Jul 2002 |
| 73 | Acock Operating Limited | San Antonio, TX 78270 | Oil & Gas Operator | Jul 2026 |
| 74 | Acock/Anaqua Operating Co., LC | Corpus Christ, TX 78401 | Oil & Gas Operator | Apr 2004 |
| 75 | Acock/Anaqua Operating Co., LP | Corpus Christ, TX 78401 | Oil & Gas Operator | Jul 2026 |
| 76 | Acoma Oil Corporation | Saint Paul, MN 55102 | Oil & Gas Operator | Jul 2026 |
| 77 | Acoma Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Jul 2026 |
| 78 | Acorn Oil & Gas, Inc. | Orchard, TX 77464 | Oil Operator | Sep 2017 |
| 79 | Acorn Oil & Gas, LLC | Iraan, TX 79744 | Oil & Gas Operator | Jul 2026 |
| 80 | Activa Resources, LLC | Dallas, TX 75254 | Oil & Gas Operator | Jul 2026 |
| 81 | Activa Resources, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2008 |
| 82 | Active Iron Energy, LLC | Plano, TX 75093 | Oil & Gas Operator | Jul 2026 |
| 83 | Ad Astra Resources, LLC | Wichita, KS 67203 | Oil & Gas Operator | Jul 2026 |
| 84 | Ada Belle Oil & Gas Company | Sourlake, TX 77659 | Oil Operator | Dec 2023 |
| 85 | Ada Exploration | Olney, TX 76374 | Oil & Gas Operator | Jul 2026 |
| 86 | Adair Resources Inc. | Ennis, TX 75120 | Oil & Gas Operator | Apr 2018 |
| 87 | Adamas Energy LLC | Dover, DE 19904 | Oil & Gas Operator | Jul 2026 |
| 88 | Adami Compressor Service | Weatherford, TX 76086 | Gas Operator | Aug 2025 |
| 89 | Adams & McGahey | Amarillo, TX 79114 | Oil & Gas Operator | Nov 1998 |
| 90 | Adams Affiliates, Inc. | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2026 |
| 91 | Adams Branch Exploration Company | Abilene, TX 79608 | Oil & Gas Operator | Jul 2002 |
| 92 | Adams Lynn V. The Estate Of | Nocona, TX 76255 | Oil Operator | Jul 2026 |
| 93 | Adams Resources Expl. Corp. | Houston, TX 77001 | Oil & Gas Operator | Apr 2020 |
| 94 | Adams, K. S. Jr. | Houston, TX 77001 | Gas Operator | Sep 2013 |
| 95 | Adams, Lynn V. | Nocona, TX 76255 | Oil & Gas Operator | Jul 2026 |
| 96 | Adams, R. W. & Son | Amarillo, TX 79109 | Oil & Gas Operator | Oct 1996 |
| 97 | Adamson Exploration Co. | Kilgore, TX 75662 | Oil Operator | Jul 2026 |
| 98 | Adamson Exploration Corporation | Kilgore, TX 75662 | Oil & Gas Operator | Mar 2008 |
| 99 | Adcock, Carol | Ozona, TX 76943 | Oil & Gas Operator | Jul 2026 |
| 100 | Adcock, Leroy | Ozona, TX 76943 | Oil & Gas Operator | Jun 2009 |