| 701 | Aurora USA Development, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2014 |
| 702 | Ausanka Oil Operations | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 1995 |
| 703 | Ausland Production Company | Midland, TX 79702 | Oil & Gas Operator | May 1999 |
| 704 | Austex Energy, Inc. | Granbury, TX 76048 | Oil & Gas Operator | Apr 1993 |
| 705 | Austin Energy Operations, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Oct 2025 |
| 706 | Austin Minerals Inc. | Austin, TX 78720 | Oil & Gas Operator | Oct 2025 |
| 707 | Austin Operating, LLC. | Chicago, IL 60622 | Oil Operator | Oct 2025 |
| 708 | Austin Production Company, Inc. | Dallas, TX 75219 | Oil & Gas Operator | Mar 2015 |
| 709 | Austin Resources Corporation | Houston, TX 77027 | Oil & Gas Operator | Mar 2008 |
| 710 | Austin Resources Oper Company | Houston, TX 77019 | Gas Operator | Mar 1999 |
| 711 | Austin Ridge Energy Corporation | Houston, TX 77224 | Oil & Gas Operator | Oct 2025 |
| 712 | Austin, Dewey | Burkburnett, TX 76354 | Oil & Gas Operator | Nov 1996 |
| 713 | Austral Oil Company Incorporated | Sulphur, LA 70663 | Oil & Gas Operator | Mar 2008 |
| 714 | Auten Operating Company, Inc. | Houston, TX 77242 | Oil & Gas Operator | May 1998 |
| 715 | Auterra Operating, LLC | Friendswood, TX 77549 | Oil & Gas Operator | Oct 2025 |
| 716 | Autry Producing Co. | Cisco, TX 76437 | Oil & Gas Operator | Aug 2008 |
| 717 | Autry Producing Inc. | Cisco, TX 76437 | Oil Operator | Oct 2025 |
| 718 | Autry, Martin | Seguin, TX 78155 | Oil Operator | Oct 2025 |
| 719 | Autumn Energy LLC | Andrews, TX 79714 | Oil Operator | Aug 2017 |
| 720 | Autumn Energy Operating | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 721 | Av-Tech Resources Corporation | Kerrville, TX 78028 | Oil & Gas Operator | Jul 2022 |
| 722 | Avad Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 723 | Avalanche Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Oct 2025 |
| 724 | Avalon TX Operating, LLC | Andrews, TX 79714 | Oil & Gas Operator | Jan 2023 |
| 725 | Aven Gas & Oil Inc | Oklahoma City, OK 73113-0491 | Oil & Gas Operator | Nov 2021 |
| 726 | Averill, W. M. Inc. | Victoria, TX 77902 | Oil & Gas Operator | Jun 2003 |
| 727 | Avery Oil & Gas, L.P. | Buena VIsta, CO 81211 | Gas Operator | Dec 2006 |
| 728 | Avery, Irving W. | Buena VIsta, CO 81211 | Oil & Gas Operator | Mar 2008 |
| 729 | Avian Tech International, Inc. | Euless, TX 76040 | Oil & Gas Operator | Apr 1995 |
| 730 | Aviara Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2002 |
| 731 | Avid Energy Assets LLC | Midland, TX 79708 | Oil & Gas Operator | Oct 2025 |
| 732 | Avighna Energy Inc | Sugar Land, TX 77487 | Oil & Gas Operator | Jan 2019 |
| 733 | Avips Petroleum, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Jun 1996 |
| 734 | Avra Oil Co | Dallas, TX 75248 | Oil & Gas Operator | Oct 2025 |
| 735 | Awp Operating Company | George West, TX 78022 | Oil & Gas Operator | Oct 2025 |
| 736 | Axia Energy II LLC | HGHLNDS Ranch, CO 80129 | Oil & Gas Operator | Jan 2020 |
| 737 | Axio Production Company, L.P. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2006 |
| 738 | Axis Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Oct 2025 |
| 739 | Axtel Energy, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Oct 2025 |
| 740 | Ayers Oil Co. | Crystal City, TX 78839 | Oil & Gas Operator | Sep 1995 |
| 741 | Ayers, R.B. | Sidney, TX 76474 | Oil & Gas Operator | Apr 2003 |
| 742 | Ayres, C. D. | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 743 | Ayres, Joe D. | Holliday, TX 76366 | Oil & Gas Operator | Dec 2004 |
| 744 | Azimuth Energy, LLC | Denver, CO 80203 | Oil & Gas Operator | Sep 2006 |
| 745 | Aztec Drilling & Operating, LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2015 |
| 746 | Aztec Energy, LLC | Wichita Falls, TX 76301 | Oil Operator | Oct 2025 |
| 747 | Aztec Oil & Gas Company "A" | Wichita Falls, TX 76309 | Oil & Gas Operator | Sep 2010 |
| 748 | Azteca Operating, Inc. | Electra, TX 76360 | Oil Operator | Oct 2025 |
| 749 | Azteca Petroleum, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Oct 2025 |
| 750 | Aztel Operating Inc. | Windthorst, TX 76389 | Oil Operator | Oct 2003 |
| 751 | Aztex Petroleum | Chandler, AZ 85249 | Oil & Gas Operator | Oct 2025 |
| 752 | Azul, Inc. | Buffalo Gap, TX 79508 | Oil & Gas Operator | Aug 1995 |
| 753 | B & B Drilling Co. | Milano, TX 76556 | Oil & Gas Operator | Jul 2015 |
| 754 | B & B Energy | Kermit, TX 79745 | Oil & Gas Operator | Oct 2025 |
| 755 | B & B Energy (I) | Imperial, TX 79743 | Oil & Gas Operator | Oct 2025 |
| 756 | B & B Farm Industries, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Apr 2002 |
| 757 | B & B Oil Company | Corsicana, TX 75110 | Oil & Gas Operator | Jun 2025 |
| 758 | B & B Oil, Inc. | Kerrville, TX 78028 | Oil & Gas Operator | Oct 2025 |
| 759 | B & B Operating Company | Odessa, TX 79760 | Oil & Gas Operator | Oct 2025 |
| 760 | B & B Production Co | Midland, TX 79708 | Oil & Gas Operator | Dec 2002 |
| 761 | B & D Enterprises | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2014 |
| 762 | B & G Energy Corporation | Dallas, TX 75214 | Oil & Gas Operator | Oct 2025 |
| 763 | B & G Oil | Graham, TX 76450 | Oil & Gas Operator | Mar 2015 |
| 764 | B & H Oilfield Services | Midland, TX 79702 | Oil & Gas Operator | Jul 1996 |
| 765 | B & L Minerals, Inc. | Houston, TX 77036 | Oil & Gas Operator | Aug 2003 |
| 766 | B & M Energy | Midland, TX 79705 | Oil & Gas Operator | Jul 2003 |
| 767 | B & M Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Dec 2011 |
| 768 | B & M Operating Co., Inc. | Houston, TX 77006 | Oil & Gas Operator | Oct 2025 |
| 769 | B & N Trucking | Quitman, TX 75783 | Oil & Gas Operator | May 1996 |
| 770 | B & R Contracting | Milam, TX 75959 | Gas Operator | Apr 2003 |
| 771 | B & R Oil, Inc. | Odessa, TX 79768 | Oil & Gas Operator | Dec 2024 |
| 772 | B & R Operating, LLC | San Angelo, TX 76903 | Oil & Gas Operator | Jan 2007 |
| 773 | B & S Oil Company | Kermit, TX 79745 | Oil & Gas Operator | Jun 2025 |
| 774 | B & S Production | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2009 |
| 775 | B & S Salvage | Post, TX 79356 | Oil & Gas Operator | Oct 2025 |
| 776 | B & T Operating Co. | Dawson, TX 76639 | Oil & Gas Operator | Oct 2025 |
| 777 | B & V Rocking S, LLC | Holliday, TX 76366 | Oil Operator | Oct 2025 |
| 778 | B & W Operating, L.L.C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Jul 2025 |
| 779 | B & W Southern Petroleum | The Woodlands, TX 77381 | Oil & Gas Operator | Aug 2009 |
| 780 | B A C O, LTD. | Hardin, TX 77561 | Oil & Gas Operator | Apr 2003 |
| 781 | B And G Production, Inc. | Woodward, OK 73801 | Oil & Gas Operator | Oct 2025 |
| 782 | B And M Production | Burkburnett, TX 76354 | Oil Operator | Oct 2025 |
| 783 | B C & D Oil & Gas Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Oct 2025 |
| 784 | B D Production Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 785 | B H & C Operating Company, Inc. | Luling, TX 78648 | Oil & Gas Operator | Oct 2025 |
| 786 | B J Oil Company | Corsicana, TX 75109 | Oil & Gas Operator | Oct 2025 |
| 787 | B J Resources, L.L.C. | Athens, TX 75751 | Oil & Gas Operator | Oct 2025 |
| 788 | B K Energy, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Oct 2006 |
| 789 | B K L Incorporated | Morton, TX 79346 | Oil & Gas Operator | Jun 2002 |
| 790 | B L Oil And Gas | Loco Hills, NM 88255 | Oil & Gas Operator | Aug 2010 |
| 791 | B M Energy, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Jan 2022 |
| 792 | B P Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Nov 2007 |
| 793 | B&E Exploration, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Sep 2009 |
| 794 | B&L Exploration, L.L.C. | Metairie, LA 70001 | Oil & Gas Operator | Oct 2025 |
| 795 | B&L Operating Co. | Price, TX 75687 | Oil & Gas Operator | Oct 2025 |
| 796 | B&L Resources, L.L.C. | Metairie, LA 70001 | Oil & Gas Operator | Oct 2025 |
| 797 | B-3 Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Oct 2025 |
| 798 | B-B Production | Ira, TX 79527 | Oil & Gas Operator | Oct 2025 |
| 799 | B-J Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 800 | B-Jaks Oil Production | Lubbock, TX 79413 | Oil Operator | Mar 2008 |