| 2501 | Bustamante Oil Company | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 2502 | Bustamante Resources LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 2503 | Busted Knuckle Oil & Gas LLC | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2024 |
| 2504 | Butcher Energy Corp | Newark, OH 43055 | Oil & Gas Operator | Dec 2014 |
| 2505 | Butkin Oil Company | Duncan, OK 73534-2090 | Oil & Gas Operator | Sep 2021 |
| 2506 | Butkin Oil Company LLC | Duncan, OK 73533 | Oil & Gas Operator | Mar 2023 |
| 2507 | Butler & Harbison | Olney, TX 76374 | Oil & Gas Operator | Oct 2005 |
| 2508 | Butler & Haseloff | Vernon, TX 76384 | Oil Operator | Jul 1993 |
| 2509 | Butler B F | Hobart, OK 73651 | Oil Operator | Apr 2014 |
| 2510 | Butler County Flood, Inc | Santa Monica, CA 90409 | Oil Operator | Dec 2015 |
| 2511 | Butler Larry | Bladensburg, OH 43005 | Oil & Gas Operator | Dec 2019 |
| 2512 | Butler Oil Co | Casper, WY 82602 | Oil & Gas Operator | Dec 1996 |
| 2513 | Butler Petroleum Corp | Norman, OK 73069-7111 | Oil & Gas Operator | Dec 1998 |
| 2514 | Butler Petroleum LLC | Van Alstyne, TX 75495 | Oil Operator | May 2020 |
| 2515 | Butler, C. D. | Grandfalls, TX 79742 | Oil & Gas Operator | Dec 2004 |
| 2516 | Butler, Cecil D | | Oil & Gas Operator | Sep 2025 |
| 2517 | Butler, Harold F. | Independence, KS 67301 | Oil Operator | Sep 2002 |
| 2518 | Butler, Kevin O. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 2519 | Butler, Kevin O. & Assoc., Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 2520 | Butte Oil And Gas Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Oct 2025 |
| 2521 | Buttes Gas & Oil Co | | Oil & Gas Operator | Dec 2009 |
| 2522 | Buttes Res Co | | Oil Operator | Dec 2023 |
| 2523 | Buttes Resources Company | Houston, TX 77056 | Oil & Gas Operator | May 2007 |
| 2524 | Buttonwood Petro | | Oil & Gas Operator | Aug 1994 |
| 2525 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 2526 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 2527 | Buttram Operating Company LLC | Heath, TX 75032-1931 | Oil & Gas Operator | Sep 2025 |
| 2528 | Buxton Energy LLC | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Apr 2014 |
| 2529 | Buxton Fred M | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Feb 2007 |
| 2530 | BVD Inc | Yates Center, KS 66783-0194 | Oil & Gas Operator | Oct 2025 |
| 2531 | BVX Operating, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Dec 2025 |
| 2532 | BW Oil LLC | Hamel, MN 55340 | Oil Operator | Jun 2015 |
| 2533 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 2534 | BWB Resources Inc | Colorado Springs, CO 80908-7204 | Oil & Gas Operator | Jan 2016 |
| 2535 | BWC Energy LLC | Edgerton, KS 66021 | Oil Operator | Jun 2025 |
| 2536 | BXP Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Dec 2025 |
| 2537 | Byargeon & Sons Oil Co. | | Oil Operator | Nov 2000 |
| 2538 | Byars Bill Inc | Okmulgee, OK 74447-0850 | Oil & Gas Operator | Apr 2015 |
| 2539 | Bye, April & Scott | Kevin, MT 59454 | Oil & Gas Operator | Sep 2025 |
| 2540 | Byers Clarice An | | Oil Operator | Nov 1988 |
| 2541 | Byers, R.D. | Vernon, TX 76384 | Oil & Gas Operator | Feb 1998 |
| 2542 | Bykowicz, Francis J. | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 2543 | Byler Drilling Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 2544 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | Dec 2025 |
| 2545 | Byng Operating LLC | Ada, OK 74820-0677 | Oil & Gas Operator | Aug 2025 |
| 2546 | Bynum Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jul 2003 |
| 2547 | Byrd Operating Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 2548 | Byrne Oil Company | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2025 |
| 2549 | Byrne, Robert E. | Lubbock, TX 79416 | Oil & Gas Operator | Jan 2005 |
| 2550 | Byron Oil Industries Inc | Ballwin, MO 63011 | Oil & Gas Operator | Apr 2019 |
| 2551 | Byron Ruple | | Oil Operator | Jan 2025 |
| 2552 | Bytex Oil Company | Midland, TX 79708 | Oil & Gas Operator | Jan 2019 |