| 1 | 1849 Energy Partners Oprtng, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Feb 2022 |
| 2 | 3 S Production, Inc. | Cisco, TX 76437 | Oil & Gas Operator | May 2025 |
| 3 | 3-R Production, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | May 2025 |
| 4 | 3-T Exploration, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 5 | 31 Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 6 | 375 Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 7 | A J Myers Prod. LLC | Jacksboro, TX 76458 | Oil & Gas Operator | May 2025 |
| 8 | Aardolie Oil Company | Dallas, TX 75370 | Oil & Gas Operator | Jul 2003 |
| 9 | Abel, M.D. Co. | Lampasas, TX 76550 | Oil & Gas Operator | Jun 2017 |
| 10 | Abernathy Auto, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 11 | Acoma Oil Corporation | Saint Paul, MN 55102 | Oil & Gas Operator | May 2025 |
| 12 | Adkins, R. L. Corp. | Lubbock, TX 79408 | Oil & Gas Operator | Jun 2013 |
| 13 | Aec Oil & Gas USA Inc | Denver, CO 80202 | Oil & Gas Operator | May 2004 |
| 14 | Aeternum Energy, LLC | Nederland, TX 77627 | Oil & Gas Operator | May 2025 |
| 15 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 16 | Aggietech Oil, LTD. | Midland, TX 79701 | Oil & Gas Operator | Aug 2016 |
| 17 | Akers & Fultz, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2003 |
| 18 | Albert, David Oil & Gas | Dallas, TX 75240 | Oil & Gas Operator | Mar 2008 |
| 19 | Allar Co., The | Graham, TX 76450 | Oil & Gas Operator | Dec 2004 |
| 20 | Allison/Hobbs Inc. | Alba, TX 75410 | Oil & Gas Operator | May 2025 |
| 21 | Altex Resources, Inc. | Carney, OK 74832 | Oil & Gas Operator | Mar 2015 |
| 22 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 23 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 24 | Amen Oil LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 25 | American Star Energy & Min. Corp | Katy, TX 77449 | Oil & Gas Operator | May 2025 |
| 26 | American West Resources, Inc | Fort Worth, TX 76161 | Oil & Gas Operator | May 2025 |
| 27 | Americo Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2012 |
| 28 | Ammo Energy, LLC | Oklahoma City, OK 73160 | Oil & Gas Operator | Feb 2009 |
| 29 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Mar 2025 |
| 30 | Anderson, E D | Cisco, TX 76437 | Oil & Gas Operator | Nov 2009 |
| 31 | Antero Resources I, LP | Denver, CO 80202 | Oil & Gas Operator | Jun 2005 |
| 32 | Antle Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 33 | Antle, E. | Graham, TX 76450 | Oil & Gas Operator | Oct 1994 |
| 34 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 35 | Apex Operating & Equip. Co. | Bowie, TX 76230 | Oil & Gas Operator | Nov 2003 |
| 36 | Argali Resources | Dallas, TX 75206 | Oil & Gas Operator | Apr 2003 |
| 37 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 38 | Armor Petroleum, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 39 | Arrowhead Productions, LP | Fort Worth, TX 76109 | Oil & Gas Operator | May 2025 |
| 40 | Aruba Petroleum, Inc. | Dallas, TX 75379 | Oil & Gas Operator | Feb 2025 |
| 41 | Asher Resources | Boerne, TX 78006 | Oil & Gas Operator | May 2015 |
| 42 | Aspen Operating Company LLC | Fort Worth, TX 76116 | Oil & Gas Operator | May 2025 |
| 43 | Atapco | Houston, TX 77040 | Oil & Gas Operator | Feb 1999 |
| 44 | Atlas Barnett, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2019 |
| 45 | Atlas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 46 | Azteca Petroleum, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | May 2025 |
| 47 | B.O.L.D. Oil And Gas, LLC | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 48 | B.W.O.C., Inc. | Plano, TX 75026 | Oil & Gas Operator | May 2025 |
| 49 | Bah-Pepper Operating, LLC | Nocona, TX 76255 | Oil & Gas Operator | May 2025 |
| 50 | Baja Production | Bridgeport, TX 76426 | Oil & Gas Operator | May 2025 |
| 51 | Balcones Production Company | Houston, TX 77002 | Oil & Gas Operator | Feb 1996 |
| 52 | Bankhead E & P LLC | Farmers BRNCH, TX 75234 | Oil & Gas Operator | May 2025 |
| 53 | Bankhead Operating Corp. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 54 | Bara Corporation | Flower Mound, TX 75027 | Oil & Gas Operator | Apr 2004 |
| 55 | Barnes Oil & Gas LLC | Nashville, TN 37221 | Oil & Gas Operator | Jun 2017 |
| 56 | Barnes, Jerry B. | Gainesville, TX 76241 | Oil & Gas Operator | Oct 2006 |
| 57 | Barnes, Larry Petroleum, Inc. | Englewood, CO 80112 | Oil & Gas Operator | Jul 1996 |
| 58 | Barnett Oil Investments, Inc. | Hobbs, NM 88240 | Oil & Gas Operator | Mar 1999 |
| 59 | Basic Energy Services, L.P. | Fort Worth, TX 76102 | Oil Operator | May 2025 |
| 60 | Bataa Oil Inc | Arvada, CO 80005 | Oil & Gas Operator | Mar 2025 |
| 61 | Bedrock Production, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 62 | Bennett Production Corporation | Bowie, TX 76230 | Oil & Gas Operator | Apr 2024 |
| 63 | Best Petroleum Explorations,Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | May 2025 |
| 64 | Bettis, Boyle & Stovall | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 65 | BHP Petroleum (Americas) Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 66 | Big Mountain Operating LLC | Decatur, TX 76234 | Oil & Gas Operator | Nov 2021 |
| 67 | Bivins, Orville J. Jr. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2004 |
| 68 | BKV Barnett, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | May 2025 |
| 69 | BKV North Texas, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | May 2025 |
| 70 | Black Bandana LLC | Santo, TX 76472 | Oil & Gas Operator | May 2025 |
| 71 | Black Gold Energy LLC | Jenks, OK 74037 | Oil Operator | Jun 2024 |
| 72 | Black Sheep Operating, LLC | Amarillo, TX 79109 | Oil & Gas Operator | May 2025 |
| 73 | Black, Karl T. | Paradise, TX 76073 | Oil & Gas Operator | Aug 2003 |
| 74 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | May 2025 |
| 75 | Bluestone Natural Res. II, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2019 |
| 76 | Borderline Operating Corp. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 77 | BP America Production Company | Denver, CO 80202 | Oil & Gas Operator | Feb 2025 |
| 78 | Bra-De Oil & Gas Inc. | Montague, TX 76251 | Oil & Gas Operator | Jun 2016 |
| 79 | Bra-De Oil Co. | Bowie, TX 76230 | Oil & Gas Operator | Jun 2005 |
| 80 | Braden Exploration, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2011 |
| 81 | Bradley, John W. Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2025 |
| 82 | Brammer Petroleum, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | May 2025 |
| 83 | Brammer Supply Inc | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2014 |
| 84 | Brannon Oil & Gas Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2013 |
| 85 | Bravo Natural Resources, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Jun 2009 |
| 86 | Breck Operating Corp. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2025 |
| 87 | BRG Lone Star LTD. | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 88 | Briar Energy Corporation | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 89 | Bridwell Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 90 | Brigadier Operating, LLC | Plano, TX 75024 | Oil & Gas Operator | Aug 2017 |
| 91 | Bright & Company | The Colony, TX 75056 | Oil & Gas Operator | May 2015 |
| 92 | Briley Operating, LLC | Abilene, TX 79608 | Oil & Gas Operator | May 2025 |
| 93 | Bristol Resources Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2022 |
| 94 | Brower Oil & Gas Co., Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 95 | Buck Production Co. | Jacksboro, TX 76458 | Oil & Gas Operator | May 2025 |
| 96 | Bud Oil, Inc. | Duncan, OK 73534 | Oil & Gas Operator | May 2025 |
| 97 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 98 | Burk Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2002 |
| 99 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | May 2025 |
| 100 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |