| 21501 | Owl Ops LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 21502 | Own Resources Operating LLC | The Woodlands, TX 77381 | Oil & Gas Operator | Apr 2025 |
| 21503 | Ows Acquisition Co LLC | Louisville, OH 44641 | Oil & Gas Operator | Dec 2024 |
| 21504 | Ows Energy LLC | Carlton, PA 16311-1605 | Oil & Gas Operator | Apr 2025 |
| 21505 | Ows Energy, Inc. | Montgomery, TX 77356 | Oil & Gas Operator | Jun 2025 |
| 21506 | Oxbow EP LLC | | Oil Operator | Dec 2024 |
| 21507 | Oxbow Oil Company,A Kansas General Partnership | Grenola, KS 67346 | Oil Operator | Apr 2015 |
| 21508 | Oxbow Petroleum, LLC | Midland, TX 79703 | Oil & Gas Operator | Jun 2025 |
| 21509 | Oxbow Properties Inc | Centennial, CO 80122-1422 | Oil & Gas Operator | Jan 2025 |
| 21510 | Oxco, LLC | | Oil & Gas Operator | Feb 2015 |
| 21511 | Oxenergy Incorporated | Flower Mound, TX 75022 | Oil & Gas Operator | Jun 2025 |
| 21512 | Oxford Explorati | | Oil & Gas Operator | Mar 1993 |
| 21513 | Oxford Exploration | | Oil Operator | Apr 1988 |
| 21514 | Oxford Exploration Company | Denver, CO 80237 | Oil & Gas Operator | Aug 1995 |
| 21515 | Oxford Oil | Zanesville, OH 43702-0910-0910 | Oil & Gas Operator | Dec 2012 |
| 21516 | Oxford Oil Co. | Rockdale, TX 76567 | Oil & Gas Operator | Aug 2004 |
| 21517 | Oxford Oil Inc | Cleveland, OK 74020 | Oil & Gas Operator | Feb 1997 |
| 21518 | Oxley Energy LLC | Houston, TX 77042 | Gas Operator | Mar 2025 |
| 21519 | Oxley John C | Tulsa, OK 74103 | Oil & Gas Operator | Sep 1996 |
| 21520 | Oxley Petroleum | Tulsa, OK 74119-3609 | Oil & Gas Operator | Jan 2020 |
| 21521 | Oxley Petroleum Co | Oklahoma City, OK 73118-1044 | Oil & Gas Operator | Sep 2017 |
| 21522 | Oxson Co. | Uvalde, TX 78802 | Gas Operator | Jun 2025 |
| 21523 | Oxtex Inc | | Oil & Gas Operator | Oct 1989 |
| 21524 | Oxxn | Weatherford, TX 76086 | Oil & Gas Operator | Oct 2023 |
| 21525 | Oxy Little Knife, LLC | | Oil & Gas Operator | Jan 2016 |
| 21526 | Oxy Petroleum Inc | | Oil & Gas Operator | Jan 1986 |
| 21527 | Oxy USA | | Oil Operator | Apr 1992 |
| 21528 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Jun 2025 |
| 21529 | Oxy USA WTP Limited Partnership | Houston, TX 772104294 | Oil & Gas Operator | Apr 2025 |
| 21530 | Oxy USA WTP LP | Houston, TX 77046 | Oil & Gas Operator | Jun 2025 |
| 21531 | Oxyrock Operating, LLC | Houston, TX 77046 | Oil & Gas Operator | Jun 2025 |
| 21532 | Oz Gas Corporation | Austin, TX 78746 | Gas Operator | Jun 2025 |
| 21533 | Oz Gas LTD | Tidioute, PA 16351-2648 | Oil & Gas Operator | Dec 2016 |
| 21534 | Ozark Enterprise | | Oil Operator | Nov 1990 |
| 21535 | Ozark Exploration, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jun 2025 |
| 21536 | Ozark Oil Corporation | Springfield, MO 65804 | Oil & Gas Operator | Oct 1992 |
| 21537 | Ozark Oil LLC | Beallsville, OH 43716 | Oil & Gas Operator | Dec 2024 |
| 21538 | Ozark Production Company, Inc. | | Oil & Gas Operator | Jan 2025 |
| 21539 | Oztx Oil & Gas, L.L.C. | Ozona, TX 76943 | Oil & Gas Operator | Jun 2025 |
| 21540 | Ozzo Corporation, The | Bedford, TX 76021 | Oil Operator | Jun 2025 |
| 21541 | P & A Oilfield Services, Inc. | | Oil & Gas Operator | Jan 1998 |
| 21542 | P & A Operating, Inc. | Houston, TX 77095 | Oil & Gas Operator | Jun 2025 |
| 21543 | P & A Well Service | | Oil & Gas Operator | Jan 1994 |
| 21544 | P & C Energy Co | Allegany, NY 14706-9615 | Oil Operator | Dec 2015 |
| 21545 | P & C Oil & Gas, Inc. | Linn, WV 26384 | Oil & Gas Operator | Dec 2021 |
| 21546 | P & C Oil Company | Leona, TX 75850 | Oil & Gas Operator | Apr 2025 |
| 21547 | P & C Petroleum, LLC | Shawnee, KS 66226 | Oil Operator | Jan 2025 |
| 21548 | P & D Valentine Oil Co | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2018 |
| 21549 | P & E Oil | | Oil & Gas Operator | Dec 2024 |
| 21550 | P & H Construction Inc | Wewoka, OK 74884 | Oil & Gas Operator | Jun 2024 |
| 21551 | P & H Oil & Gas Inc | Stroud, OK 74079 | Oil & Gas Operator | Apr 2025 |
| 21552 | P & H Vacuum Service | | Oil & Gas Operator | Aug 2024 |
| 21553 | P & J Resources, Inc | | Oil & Gas Operator | Dec 2013 |
| 21554 | P & M Construction | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 21555 | P & M Drilling Company Inc | Depew, OK 74028 | Oil & Gas Operator | Dec 2004 |
| 21556 | P & M Energy, A General Partnership | Johnson, KS 67855 | Gas Operator | Sep 2003 |
| 21557 | P & M Oil Company | Hays, KS 67601 | Oil & Gas Operator | Mar 2025 |
| 21558 | P & M Petroleum Management | Denver, CO BAD ADDR | Oil & Gas Operator | Apr 2010 |
| 21559 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 21560 | P & P Petroleum | Midland, TX 79706 | Oil & Gas Operator | Oct 2002 |
| 21561 | P & P Producing Inc | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 21562 | P & R Oil Company | Post, TX 79356 | Oil & Gas Operator | Jun 2025 |
| 21563 | P & S Energy Inc | Mineral Ridge, OH 44440 | Oil & Gas Operator | Dec 2019 |
| 21564 | P & S Oil And Gas Corporation | | Gas Operator | Dec 1996 |
| 21565 | P & S Production LLC | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2013 |
| 21566 | P & W Oil | Lakewood, CO 80215 | Oil Operator | Sep 1985 |
| 21567 | P & W Well Service Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2025 |
| 21568 | P & WG Resources L.L.C. | Batson, TX 77519 | Oil & Gas Operator | Jan 2011 |
| 21569 | P A Energy Inc | Calvin, OK 74531-0248 | Oil & Gas Operator | Apr 2020 |
| 21570 | P D Parker | | Oil & Gas Operator | Aug 1985 |
| 21571 | P E Trichel | | Gas Operator | May 1980 |
| 21572 | P F Beeler LLC | Norman, OK 73072-7522 | Oil & Gas Operator | Apr 2025 |
| 21573 | P I C Inc | Ponca City, OK 74602 | Oil & Gas Operator | Jan 2013 |
| 21574 | P J Oil Co. | | Oil Operator | Feb 2025 |
| 21575 | P K & L Oil Properties | Shawnee, OK 74802-0931 | Oil & Gas Operator | Mar 2001 |
| 21576 | P O & G Panhandle LP | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 21577 | P P & G Oil | Pickerington, OH 43147 | Oil & Gas Operator | Dec 2023 |
| 21578 | P T C, Inc | Raccoon, KY 41557 | Gas Operator | Dec 2023 |
| 21579 | P T Oil Co Inc | Walters, OK 73572-9505 | Oil Operator | Nov 2014 |
| 21580 | P&B Petroleum LLC | Miami, FL 33166 | Oil & Gas Operator | Jun 2025 |
| 21581 | P&F Operations, LLC | Thrall, TX 76578 | Oil Operator | Jun 2025 |
| 21582 | P&H Gas, LLC | Fredonia, NY 14063 | Gas Operator | Dec 2023 |
| 21583 | P&P Industries, Inc. | Austin, TX 78737 | Oil & Gas Operator | Dec 2002 |
| 21584 | P,B&B Operating Inc. | Coleman, TX 76834 | Oil & Gas Operator | Jun 2025 |
| 21585 | P-2 Exploration Co. | Amarillo, TX 79124 | Oil & Gas Operator | Feb 2005 |
| 21586 | P-2 Exploraton Co Inc | Pampa, TX 79065-2920 | Oil & Gas Operator | Jun 1996 |
| 21587 | P-2 Oil | Vernal, UT 84078 | Oil & Gas Operator | Jul 2000 |
| 21588 | P-K Oil Co. | Olney, TX 76374 | Oil & Gas Operator | Aug 2003 |
| 21589 | P-R-O Management, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jun 2025 |
| 21590 | P-Tex Petroleum, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Nov 1999 |
| 21591 | P. B. Operating Company | | Oil & Gas Operator | Feb 1978 |
| 21592 | P. D. L. Services, Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2024 |
| 21593 | P. G. Oil & Gas, LLC | Clarksburg, WV 26302-2512 | Oil & Gas Operator | Dec 2021 |
| 21594 | P. K. Smith | | Oil Operator | Mar 1997 |
| 21595 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 21596 | P. R. L. Oil Company | Albany, TX 76430 | Oil & Gas Operator | Apr 2008 |
| 21597 | P. S. & G., Incorporated | | Gas Operator | Aug 1983 |
| 21598 | P.B. Blue Dot Properties | Wexford, PA 15090 | Oil & Gas Operator | Jun 2025 |
| 21599 | P.C.S.I. | | Oil & Gas Operator | Jun 1987 |
| 21600 | P.D.T. Drilling Limited Partnership | St. Albans, WV 25177 | Gas Operator | Dec 2021 |