| 2501 | Behlen Incorporated | | Oil Operator | Jun 2001 |
| 2502 | Behm Energy, Inc. | Minot, ND 58702 | Oil & Gas Operator | Mar 2026 |
| 2503 | Behrens Resources Inc | | Oil & Gas Operator | Jul 2019 |
| 2504 | Beisch & Hanna | Windthorst, TX 76389 | Oil & Gas Operator | Apr 2026 |
| 2505 | Beisch, Larry | Iowa Park, TX 76367 | Oil & Gas Operator | Apr 2026 |
| 2506 | Beisch, Rusty | Windthorst, TX 76389 | Oil & Gas Operator | Apr 2026 |
| 2507 | Beisser Agnes Gas & Oil | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1996 |
| 2508 | Bejo Corporation | Richmond, TX 77407 | Oil & Gas Operator | Apr 2026 |
| 2509 | Bel Oil Corporation | Jenks, OK 74037 | Oil & Gas Operator | Jun 2005 |
| 2510 | Bel Oil Corporation, Etal | | Oil & Gas Operator | May 1987 |
| 2511 | Belco Development Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 1994 |
| 2512 | Belco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2015 |
| 2513 | Belco Operating Corp. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1998 |
| 2514 | Belco Petroleum Corp | Grand Junction, CO | Oil & Gas Operator | Dec 1983 |
| 2515 | Belcor Inc. | Irvine, CA 92714 | Oil & Gas Operator | Nov 2000 |
| 2516 | Belden & Blake | | Oil & Gas Operator | Feb 1988 |
| 2517 | Belden & Blake Corporation | North Canton, OH 44720 | Oil & Gas Operator | Dec 2016 |
| 2518 | Belden And Blake Corp Dba Ward Lake Energy | | Oil & Gas Operator | Jul 2020 |
| 2519 | Belden Brick Co LLC, The | Sugar Creek, OH 44681 | Oil & Gas Operator | Dec 2025 |
| 2520 | Belisle Pete H | Tulsa, OK 74133 | Oil & Gas Operator | Apr 2015 |
| 2521 | Belknap Enterprises | Exchange, WV 26619 | Gas Operator | Dec 2021 |
| 2522 | Bell & Kinley Company | Piedmont, OK 73078 | Oil & Gas Operator | Aug 2017 |
| 2523 | Bell & Kinley Company LLC | Piedmont, OK 73078-8918 | Oil & Gas Operator | Jul 2021 |
| 2524 | Bell And Gault Drilling Inc | | Oil & Gas Operator | Apr 2001 |
| 2525 | Bell Brothers | | Oil Operator | Dec 2025 |
| 2526 | Bell Drilling & Prod Co | Logan, OH 43138 | Oil & Gas Operator | Dec 1997 |
| 2527 | Bell Energy | Kermit, TX 79745 | Oil & Gas Operator | Apr 2026 |
| 2528 | Bell Jack | Beggs, OK 74421-2107 | Oil & Gas Operator | Apr 2020 |
| 2529 | Bell John E & Sons | Bremen, OH 43107 | Oil & Gas Operator | Dec 1998 |
| 2530 | Bell Oil | Junction City, OH 43748 | Oil & Gas Operator | Dec 2025 |
| 2531 | Bell Oil Company | | Oil & Gas Operator | Oct 1985 |
| 2532 | Bell Resources Inc | Billings, MT 59104 | Oil & Gas Operator | Jun 2016 |
| 2533 | Bell Supply Co | Kilgore, TX 75662 | Oil & Gas Operator | Jan 2013 |
| 2534 | Bell, Cody, Jr. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 2535 | Bell, Johnny Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2026 |
| 2536 | Bell, Kelly Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 1995 |
| 2537 | Bell, O. M. | Merkel, TX 79536 | Oil & Gas Operator | Mar 2008 |
| 2538 | Bell, Robert | Edmonton, KY 42129 | Oil Operator | Dec 2023 |
| 2539 | Bellah & Mathiews | Woodson, TX 76491 | Oil & Gas Operator | Apr 2026 |
| 2540 | Bellah Oil, Inc. | Seymour, TX 76380 | Oil & Gas Operator | Dec 2012 |
| 2541 | Bellaire Oil Co | | Oil & Gas Operator | Dec 2025 |
| 2542 | Bellco Materials Inc | Fayetteville, AR 72703 | Oil Operator | Mar 2015 |
| 2543 | Belle Exploration, Inc. | | Oil & Gas Operator | Jun 2021 |
| 2544 | Belle Oil, Inc. | | Oil & Gas Operator | Jan 2026 |
| 2545 | Bellevue Resources Inc | Lakewood, CO 80235 | Oil & Gas Operator | Feb 2009 |
| 2546 | Bellmyer, Fred L | Caney, KS 67333 | Oil Operator | May 1997 |
| 2547 | Bellnorth Petrol | | Oil Operator | Aug 1986 |
| 2548 | Bellomo, David And Leah | Amherst, NY 14228 | Gas Operator | Dec 2024 |
| 2549 | Bellows Operating Co., L. C. | Goliad, TX 77963 | Oil & Gas Operator | Apr 2026 |
| 2550 | Bellows, Dewey Oper. Co., LTD. | Refugio, TX 78377 | Oil & Gas Operator | Jul 2013 |
| 2551 | Bellows, Richard | Three Rivers, TX 78071 | Oil & Gas Operator | Nov 2008 |
| 2552 | Bellwether Exploration Company | Houston, TX 77010 | Oil & Gas Operator | May 2001 |
| 2553 | Belmac, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Nov 1998 |
| 2554 | Belmar Oil & Gas, Inc. | Milano, TX 76556 | Oil & Gas Operator | Apr 2026 |
| 2555 | Belnorth Petroleum Corporation | Midland, TX 79701 | Oil & Gas Operator | Feb 1991 |
| 2556 | Below Ground Level LLC | Sand Springs, OK 74063 | Oil & Gas Operator | Apr 2026 |
| 2557 | Belport Oil Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2026 |
| 2558 | Belridge Energy Resources Inc. | | Oil & Gas Operator | Dec 2025 |
| 2559 | Belter Inc. | Seymour, TX 76380 | Oil Operator | Dec 2025 |
| 2560 | Belvan Corp. | Midland, TX 79701 | Oil & Gas Operator | Jun 1998 |
| 2561 | Belvoir Energy Inc. | University Heights, OH 44118-3818 | Oil & Gas Operator | Dec 2017 |
| 2562 | Bemco, LLC | Medicine Lodge, KS 67104 | Oil Operator | Dec 2025 |
| 2563 | Ben Carroll | | Oil Operator | Dec 1985 |
| 2564 | Benatty Corp., The | Cambridge, OH 43725-1002 | Oil & Gas Operator | Dec 1996 |
| 2565 | Bench Oil | Duncan, OK 73533 | Oil Operator | Apr 2014 |
| 2566 | Benchley Donald C | | Oil Operator | Jul 2012 |
| 2567 | Benchley Donald P And Benchley Jeffrey P | | Oil Operator | Dec 2020 |
| 2568 | Benchmark Crude Inc | Tulsa, OK 74105-5920 | Oil & Gas Operator | Sep 2015 |
| 2569 | Benchmark Energy LLC | Pratt, KS 67124 | Oil & Gas Operator | Sep 2023 |
| 2570 | Benchmark Oil & | | Oil Operator | Dec 1996 |
| 2571 | Benchmark Oil & Gas Co. | Houston, TX 77282 | Oil & Gas Operator | Apr 2026 |
| 2572 | Benchmark Oil & Gas Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 2573 | Benchmark Production, LLC | Midland, TX 79701 | Oil Operator | May 2006 |
| 2574 | Benchmark Resources Group LTD | Sapulpa, OK 74066-3238 | Oil & Gas Operator | Dec 2000 |
| 2575 | Benchmark Texas Petroleum, LLC. | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 2576 | Benco Energy Inc | Tionesta, PA 16353-5851 | Oil & Gas Operator | Dec 2002 |
| 2577 | Benco Operating, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2026 |
| 2578 | Bend Petroleum Corp. | Muenster, TX 76252 | Oil & Gas Operator | Nov 2023 |
| 2579 | Bendorf Services & Supply Co | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2000 |
| 2580 | Bendorf, Otto Trust | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2000 |
| 2581 | Benedum Interests | Pittsburgh, PA 15222-1794 | Gas Operator | Dec 2003 |
| 2582 | Benedum-Trees Oil Company | Chicago, IL 60673 | Oil & Gas Operator | Dec 2005 |
| 2583 | Benelli Oil LLC | | Oil Operator | Dec 2024 |
| 2584 | Bengal Oil & Gas, Inc. | | Gas Operator | Mar 2006 |
| 2585 | Bengal Petroleum USA, LLC | Austin, TX 78767 | Oil Operator | Apr 2026 |
| 2586 | Bengalia Land And Cattle Company | Tulsa, OK 74152 | Oil & Gas Operator | Oct 2025 |
| 2587 | Bengston Oil, LLC | Windom, KS 67491 | Oil Operator | Aug 2024 |
| 2588 | Bengtson, Earl L. | Salina, KS 67401 | Oil Operator | Mar 2007 |
| 2589 | Benjamin Smeltzer Company | Newport, OH 45768 | Oil & Gas Operator | Dec 2025 |
| 2590 | Benn Oil & Gas | Perryton, TX 79070 | Oil & Gas Operator | Jun 2005 |
| 2591 | Bennd Oil Company | Adams, TN 37010-8002 | Oil Operator | Oct 2025 |
| 2592 | Bennett & Schult | | Oil Operator | Jul 1995 |
| 2593 | Bennett & Schulte Oil Co., A General Partnership | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 2594 | Bennett Oil | Dale, TX 78616 | Oil & Gas Operator | Sep 2000 |
| 2595 | Bennett Oil Comp | | Oil Operator | Mar 1992 |
| 2596 | Bennett Oil Company, LLC | Russell, KS 67665 | Oil Operator | Dec 2025 |
| 2597 | Bennett Petroleum Corporation | Denver, CO 80203 | Oil Operator | Jun 1985 |
| 2598 | Bennett Petroleum Inc. | | Oil & Gas Operator | Dec 2025 |
| 2599 | Bennett Production Corporation | Bowie, TX 76230 | Oil & Gas Operator | Apr 2024 |
| 2600 | Bennett Resources, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |