| 19501 | Moleco, LLC | Santa Anna, TX 76878 | Oil Operator | Oct 2025 |
| 19502 | Moleo Gas Corp. | San Angelo, TX 76902 | Oil & Gas Operator | Apr 2018 |
| 19503 | Molitor Oil, Inc. | Wichita, KS 67205 | Oil & Gas Operator | Jun 2025 |
| 19504 | Moller, Herbert T. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2003 |
| 19505 | Mollett Oil Productions, LLC | Thelma, KY 41260 | Oil Operator | Dec 2020 |
| 19506 | Molly Oil & Gas, LLC | Dallas, TX 75209 | Oil & Gas Operator | Oct 2025 |
| 19507 | Molopo Energy Texas, LLC | Canada, 00100 | Oil & Gas Operator | Jan 2015 |
| 19508 | Molsdorf Ag LLC | McAllen, TX 78503 | Oil Operator | Sep 2013 |
| 19509 | Molz Oil Company | Kiowa, KS 67070 | Oil & Gas Operator | Jul 2025 |
| 19510 | Momentum Energy Corporation | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 19511 | Momentum Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 19512 | Momentum Oil & Gas, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | May 2015 |
| 19513 | Momentum Oil Company | Albany, TX 76430 | Oil & Gas Operator | May 2003 |
| 19514 | Momentum Operating Co., Inc. | Albany, TX 76430 | Oil & Gas Operator | Oct 2025 |
| 19515 | Momentum Production Corp. | Baytown, TX 77521 | Oil & Gas Operator | Oct 2025 |
| 19516 | Moms Oil & Gas LLC | Nowata, OK 74048 | Oil & Gas Operator | Mar 2023 |
| 19517 | Mon Corp. | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 19518 | Mon-Oil Inc | | Oil & Gas Operator | Apr 1996 |
| 19519 | Monadnock Resources Op Co, LLC | Dallas, TX 75209 | Oil & Gas Operator | Jan 2021 |
| 19520 | Monadnock Resources, LLC | Addison, TX 75001 | Oil & Gas Operator | May 2020 |
| 19521 | Monago Operating Inc | | Oil & Gas Operator | Mar 2017 |
| 19522 | Monahan | | Oil Operator | Dec 2009 |
| 19523 | Monahan Rex | Sterling, CO 80751 | Oil & Gas Operator | Jun 2002 |
| 19524 | Monahan* Rex Family Trust | | Oil & Gas Operator | Sep 2010 |
| 19525 | Monarch Energy C | | Oil Operator | Nov 1987 |
| 19526 | Monarch Energy Company LLC | Eufaula, OK 74432 | Oil & Gas Operator | Jun 2025 |
| 19527 | Monarch Energy LLC | Paola, KS 66071 | Oil Operator | Jun 2025 |
| 19528 | Monarch Operating Company | Graham, TX 76450 | Oil & Gas Operator | Jun 2006 |
| 19529 | Monarch Petroleum Corporation | FT Worth, TX 76102 | Oil & Gas Operator | Dec 2019 |
| 19530 | Moncrief Oil | Casper, WY 82602 | Oil & Gas Operator | Feb 1986 |
| 19531 | Moncrief R W Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1994 |
| 19532 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2025 |
| 19533 | Moncrief, C. B. | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2021 |
| 19534 | Monday Creek Resources LTD | Logan, OH 43138 | Oil Operator | Dec 2024 |
| 19535 | Mondiale Energy, Inc. | Brownwood, TX 76801 | Oil & Gas Operator | Oct 2025 |
| 19536 | Mondo Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 19537 | Monex | | Oil Operator | Apr 1988 |
| 19538 | Monexco | Edmond, OK 73034-3776 | Oil & Gas Operator | Mar 2008 |
| 19539 | Monexco LLC | Dallas, TX 75204-2634 | Oil & Gas Operator | Jun 2025 |
| 19540 | Monexco Operating Company | Dallas, TX 75204-2634 | Oil & Gas Operator | Jun 2025 |
| 19541 | Monexco, Inc. | | Oil Operator | Dec 2003 |
| 19542 | Monfort, Roy C. | Iola, KS 66749 | Oil & Gas Operator | Sep 1989 |
| 19543 | Monge Oil Corp. | | Oil & Gas Operator | Dec 2021 |
| 19544 | Mongoose Energy, LLC | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |
| 19545 | Mongrue Oil Company, Inc. | | Oil & Gas Operator | Oct 1999 |
| 19546 | Mongrue, Roland, Inc | | Oil & Gas Operator | Mar 1979 |
| 19547 | Monitor O&G, L.L.C. | Frisco, TX 75034 | Oil & Gas Operator | Jan 2016 |
| 19548 | Monona LLC | Ligonier, PA 15658-0612 | Gas Operator | Jul 2025 |
| 19549 | Monroe Gas Associates-1 | | Gas Operator | Mar 2000 |
| 19550 | Monroe Gas Joint Venture | | Gas Operator | Sep 2011 |
| 19551 | Monroe James | | Oil & Gas Operator | Oct 1997 |
| 19552 | Monroe Natural Gas Inc | Norman, OK 73071 | Oil & Gas Operator | Jun 2025 |
| 19553 | Monroe Res LTD | Fairport, NY 14450-3218 | Gas Operator | Dec 2004 |
| 19554 | Monroe Well Ser-Amsterdam | | Oil Operator | Dec 1988 |
| 19555 | Monroe Well Ser-La Petr Assoc | | Oil Operator | Dec 1988 |
| 19556 | Monroe Well Ser-La Petro II | | Oil Operator | Dec 1988 |
| 19557 | Monroe Well Ser-New American85 | | Oil Operator | Dec 1988 |
| 19558 | Monroe Well Ser-Ocean Petr '84 | | Oil & Gas Operator | Dec 1988 |
| 19559 | Monroe Well Ser-Ocean Yacht II | | Oil Operator | May 1989 |
| 19560 | Monroe Well Ser-Oceanyacht1985 | | Oil Operator | Dec 1988 |
| 19561 | Monroe Well Ser-Riverside 1985 | | Oil Operator | Dec 1988 |
| 19562 | Monroe Well Serv-New American | | Oil Operator | Dec 1988 |
| 19563 | Monroe Well Serv-Northern La | | Oil Operator | Dec 1988 |
| 19564 | Monroe Well Serv-Omega 1985 | | Oil Operator | Dec 1988 |
| 19565 | Monroe Well Service | | Oil & Gas Operator | Apr 1998 |
| 19566 | Monroe Well Service-Ajk | | Oil Operator | Dec 1988 |
| 19567 | Monroe Well Service-Apk | | Oil Operator | Dec 1988 |
| 19568 | Monroe Well Service-Beaver1985 | | Oil Operator | Nov 1991 |
| 19569 | Monroe Well Service-Broadway | | Oil Operator | Dec 1988 |
| 19570 | Monroe Well Service-BWK | | Oil Operator | Dec 1988 |
| 19571 | Monroe Well Service-Columbus | | Oil Operator | Dec 1988 |
| 19572 | Monroe Well Service-Das | | Oil Operator | Mar 1989 |
| 19573 | Monroe Well Service-Derrick | | Oil Operator | Dec 1988 |
| 19574 | Monroe Well Service-East End | | Oil Operator | Dec 1988 |
| 19575 | Monroe Well Service-Empire | | Oil Operator | Dec 1988 |
| 19576 | Monroe Well Service-Energy | | Oil Operator | Dec 1988 |
| 19577 | Monroe Well Service-Energy 84 | | Oil Operator | Aug 1989 |
| 19578 | Monroe Well Service-Ged | | Oil Operator | Dec 1988 |
| 19579 | Monroe Well Service-Gotham | | Oil Operator | Apr 1992 |
| 19580 | Monroe Well Service-Gramercy | | Oil Operator | May 1992 |
| 19581 | Monroe Well Service-HGC | | Oil Operator | Dec 1988 |
| 19582 | Monroe Well Service-Lebo | | Oil Operator | Jun 1989 |
| 19583 | Monroe Well Service-Lexington | | Oil Operator | Feb 1989 |
| 19584 | Monroe Well Service-Newtown | | Oil Operator | Aug 1990 |
| 19585 | Monroe Well Service-Ocean | | Oil Operator | Feb 1989 |
| 19586 | Monroe Well Service-Oceanyacht | | Oil Operator | Jan 1989 |
| 19587 | Monroe Well Service-Oil City | | Oil Operator | Aug 1992 |
| 19588 | Monroe Well Service-Omega | | Oil Operator | Aug 1992 |
| 19589 | Monroe Well Service-Par | | Oil Operator | Jan 1990 |
| 19590 | Monroe Well Service-Petrol | | Oil Operator | Sep 1992 |
| 19591 | Monroe Well Service-Petrovest | | Oil Operator | Dec 1988 |
| 19592 | Monroe Well Service-PRG | | Oil Operator | Nov 1990 |
| 19593 | Monroe Well Service-Redstone | | Oil Operator | Jul 1989 |
| 19594 | Monroe Well Service-RVS | | Oil Operator | Dec 1990 |
| 19595 | Monroe Well Service-Shemen | | Oil Operator | Dec 1988 |
| 19596 | Monroe Well Service-Shemen1984 | | Oil Operator | Jan 1989 |
| 19597 | Monroe Well Service-Shemen1985 | | Oil Operator | Nov 1990 |
| 19598 | Monroe Well Service-Sla | | Oil Operator | Mar 1989 |
| 19599 | Monroe Well Service-SPD | | Oil Operator | Dec 1988 |
| 19600 | Monroe Well Service-SPD 1985 | | Oil Operator | Dec 1988 |