| 2501 | Beck Oil Company | | Oil Operator | Sep 1996 |
| 2502 | Beck Oil Inc | | Oil & Gas Operator | Jan 2025 |
| 2503 | Beck Pump & Supply Inc | Hennessey, OK 73742-0175 | Oil & Gas Operator | Nov 2019 |
| 2504 | Beck Resources Incorporated | Hennessey, OK 73742 | Oil & Gas Operator | Jun 2025 |
| 2505 | Becker Oil Corpo | | Oil & Gas Operator | Dec 1996 |
| 2506 | Becker Oil Corporation | Ponca City, OK 74602 | Oil & Gas Operator | Jun 2025 |
| 2507 | Becker, Clyde M. | Ponca City, OK 74601 | Oil & Gas Operator | Oct 2009 |
| 2508 | Becker, Lavern | Russell, KS 67665 | Oil Operator | Oct 1995 |
| 2509 | Beckham Oil Co | Jal, NM 88252 | Oil & Gas Operator | Nov 2009 |
| 2510 | Beckham Resources, Inc. | Houston, TX 77010 | Oil & Gas Operator | Mar 2011 |
| 2511 | Beckman Production Services Inc | | Oil Operator | Jul 2025 |
| 2512 | Beckner Energy Resources LLC | | Oil Operator | Dec 2022 |
| 2513 | Becktol Linda G | Morris, OK 74445 | Oil & Gas Operator | Jun 2025 |
| 2514 | Beckville Disp Operations, LLC | Henderson, TX 75652 | Oil Operator | Sep 2025 |
| 2515 | Becsul Energy | Oklahoma City, OK 73127 | Oil Operator | Jan 1992 |
| 2516 | Becsul Energy Inc | Oklahoma City, OK 73127-4249 | Oil & Gas Operator | Jun 2025 |
| 2517 | Bedford Energy Inc | Oklahoma City, OK 73112-4731 | Oil & Gas Operator | Sep 2016 |
| 2518 | Bedford Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Sep 2025 |
| 2519 | Bedrock Production, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 2520 | Bee Cee Inc | Denton, TX 76206-0689 | Oil & Gas Operator | May 2013 |
| 2521 | Bee-Jay Energy | Whiteface, TX 79379 | Oil & Gas Operator | Nov 1993 |
| 2522 | Bee-Jay Petro, Inc. | Levelland, TX 79336 | Oil & Gas Operator | Jun 2024 |
| 2523 | Beebe And Beebe | | Oil & Gas Operator | Jun 2000 |
| 2524 | Beebe Exploration Co, LLC | El Dorado, AR 71730 | Oil Operator | Jan 2025 |
| 2525 | Beech Grove Minerals, LLC | Calhoun, KY 42327 | Oil Operator | Dec 2023 |
| 2526 | Beech Resources LLC | Williamsport, PA 17701-6209 | Gas Operator | Jun 2025 |
| 2527 | Beechlick Oil, Inc. | Salem, WV 26426-5522 | Oil & Gas Operator | Dec 2021 |
| 2528 | Beeda Oil Company | Merkel, TX 79536 | Oil & Gas Operator | Sep 2025 |
| 2529 | Beehive Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 2530 | Beekay Company | Dallas, TX 75219 | Oil & Gas Operator | Dec 1996 |
| 2531 | Beeler Phillip F | Norman, OK 73072-7522 | Oil & Gas Operator | Dec 2014 |
| 2532 | Beem Oil & Gas Company | | Oil & Gas Operator | Dec 1994 |
| 2533 | Beeman Oil & Gas LLC | | Oil & Gas Operator | Jul 2025 |
| 2534 | Beene, Tommy H. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2005 |
| 2535 | Beeson Energy, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Sep 2025 |
| 2536 | Beeson, Richard W | | Oil Operator | Dec 2022 |
| 2537 | Befco Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 1993 |
| 2538 | Behlen Incorporated | | Oil Operator | Jun 2001 |
| 2539 | Behm Energy, Inc. | Minot, ND 58702 | Oil & Gas Operator | Jul 2025 |
| 2540 | Beisch & Hanna | Windthorst, TX 76389 | Oil & Gas Operator | Sep 2025 |
| 2541 | Beisch, Larry | Iowa Park, TX 76367 | Oil & Gas Operator | Sep 2025 |
| 2542 | Beisch, Rusty | Windthorst, TX 76389 | Oil & Gas Operator | Sep 2025 |
| 2543 | Beisser Agnes Gas & Oil | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1996 |
| 2544 | Bejo Corporation | Richmond, TX 77407 | Oil & Gas Operator | Sep 2025 |
| 2545 | Bel Oil Corporation | Jenks, OK 74037 | Oil & Gas Operator | Jun 2005 |
| 2546 | Bel Oil Corporation, Etal | | Oil & Gas Operator | May 1987 |
| 2547 | Belco Development Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 1994 |
| 2548 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 2549 | Belco Operating Corp. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 2550 | Belco Petroleum Corp | Grand Junction, CO | Oil & Gas Operator | Dec 1983 |
| 2551 | Belcor Inc. | Irvine, CA 92714 | Oil & Gas Operator | Nov 2000 |
| 2552 | Belden & Blake | | Oil & Gas Operator | Feb 1988 |
| 2553 | Belden & Blake Corporation | North Canton, OH 44720 | Oil & Gas Operator | Dec 2016 |
| 2554 | Belden And Blake Corp Dba Ward Lake Energy | | Oil & Gas Operator | Jul 2020 |
| 2555 | Belden Brick Co LLC, The | Sugar Creek, OH 44681 | Oil & Gas Operator | Dec 2024 |
| 2556 | Belisle Pete H | Tulsa, OK 74133 | Oil & Gas Operator | Apr 2015 |
| 2557 | Belknap Enterprises | Exchange, WV 26619 | Gas Operator | Dec 2021 |
| 2558 | Bell & Kinley Company | Piedmont, OK 73078 | Oil & Gas Operator | Aug 2017 |
| 2559 | Bell & Kinley Company LLC | Piedmont, OK 73078-8918 | Oil & Gas Operator | Jul 2021 |
| 2560 | Bell And Gault Drilling Inc | | Oil & Gas Operator | Apr 2001 |
| 2561 | Bell Brothers | | Oil Operator | May 2025 |
| 2562 | Bell Drilling & Prod Co | Logan, OH 43138 | Oil & Gas Operator | Dec 1997 |
| 2563 | Bell Energy | Kermit, TX 79745 | Oil & Gas Operator | Sep 2025 |
| 2564 | Bell Jack | Beggs, OK 74421-2107 | Oil & Gas Operator | Apr 2020 |
| 2565 | Bell John E & Sons | Bremen, OH 43107 | Oil & Gas Operator | Dec 1998 |
| 2566 | Bell Oil | Junction City, OH 43748 | Oil & Gas Operator | Dec 2024 |
| 2567 | Bell Oil Company | | Oil & Gas Operator | Oct 1985 |
| 2568 | Bell Resources Inc | Billings, MT 59104 | Oil & Gas Operator | Jun 2016 |
| 2569 | Bell Supply Co | Kilgore, TX 75662 | Oil & Gas Operator | Jan 2013 |
| 2570 | Bell, Cody, Jr. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 2571 | Bell, Johnny Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2025 |
| 2572 | Bell, Kelly Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 1995 |
| 2573 | Bell, O. M. | Merkel, TX 79536 | Oil & Gas Operator | Mar 2008 |
| 2574 | Bell, Robert | Edmonton, KY 42129 | Oil Operator | Dec 2023 |
| 2575 | Bellah & Mathiews | Woodson, TX 76491 | Oil & Gas Operator | Sep 2025 |
| 2576 | Bellah Oil, Inc. | Seymour, TX 76380 | Oil & Gas Operator | Dec 2012 |
| 2577 | Bellaire Oil Company | | Oil & Gas Operator | Jul 2025 |
| 2578 | Bellco Materials Inc | Fayetteville, AR 72703 | Oil Operator | Mar 2015 |
| 2579 | Bellco, LLC | Edmonton, KY 42129 | Oil Operator | Dec 2023 |
| 2580 | Belle Exploration, Inc. | | Oil & Gas Operator | Jun 2021 |
| 2581 | Belle Oil, Inc. | | Oil & Gas Operator | Jul 2025 |
| 2582 | Bellevue Resources Inc | Lakewood, CO 80235 | Oil & Gas Operator | Feb 2009 |
| 2583 | Bellmyer, Fred L | Caney, KS 67333 | Oil Operator | May 1997 |
| 2584 | Bellnorth Petrol | | Oil Operator | Aug 1986 |
| 2585 | Bellomo, David And Leah | Amherst, NY 14228 | Gas Operator | Dec 2024 |
| 2586 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Sep 2025 |
| 2587 | Bellows, Dewey Oper. Co., LTD. | Refugio, TX 78377 | Oil & Gas Operator | Jul 2013 |
| 2588 | Bellows, Richard | Three Rivers, TX 78071 | Oil & Gas Operator | Nov 2008 |
| 2589 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 2590 | Belmac, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Nov 1998 |
| 2591 | Belmar Oil & Gas, Inc. | Milano, TX 76556 | Oil & Gas Operator | Sep 2025 |
| 2592 | Belnorth Petroleum Corporation | Midland, TX 79701 | Oil & Gas Operator | Feb 1991 |
| 2593 | Below Ground Level LLC | Sand Springs, OK 74063 | Oil & Gas Operator | Sep 2025 |
| 2594 | Belport Oil, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | May 2025 |
| 2595 | Belridge Energy Resources Inc. | | Oil & Gas Operator | Jul 2025 |
| 2596 | Belter Inc. | Seymour, TX 76380 | Oil Operator | Sep 2025 |
| 2597 | Belvan Corp. | Midland, TX 79701 | Oil & Gas Operator | Jun 1998 |
| 2598 | Belvoir Energy Inc. | University Heights, OH 44118-3818 | Oil & Gas Operator | Dec 2017 |
| 2599 | Bemco, LLC | Medicine Lodge, KS 67104 | Oil Operator | May 2025 |
| 2600 | Ben Carroll | | Oil Operator | Dec 1985 |