| 19501 | Mels Water Service Inc | Lysite, WY 82642 | Oil Operator | Mar 2013 |
| 19502 | Melson Oil & Gas Inc | Broken Arrow, OK 74014 | Oil & Gas Operator | Dec 2025 |
| 19503 | Melton Operating Co. | Friendswood, TX 77546 | Oil & Gas Operator | Jul 2005 |
| 19504 | Melton, Joe, DRLG. Co., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 19505 | Melton, Kenneth | Wann, OK 74083 | Oil Operator | Sep 2025 |
| 19506 | Meltzer Oil Comp | | Oil Operator | Dec 1983 |
| 19507 | Melvin Or Kathleen Turnbow | Portales, NM 88130 | Oil & Gas Operator | Mar 2006 |
| 19508 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |
| 19509 | Mem Partnership LP, A General Partnership | Spring, TX 77393 | Oil Operator | Sep 2025 |
| 19510 | Memaca Petroleum Corporation | | Oil & Gas Operator | Jan 1990 |
| 19511 | Memorial Exploration Company | Saint Louis, MO 63105 | Oil & Gas Operator | Aug 1996 |
| 19512 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 19513 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 19514 | Mendell Davis Gas Partners LLC | | Oil & Gas Operator | Dec 2013 |
| 19515 | Mendell Finisterre II LLC | | Oil & Gas Operator | Jun 2017 |
| 19516 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 19517 | Meng Oper & Expl Co | | Oil & Gas Operator | Dec 1989 |
| 19518 | Meng, Charles H | Lexington, KY 40502 | Gas Operator | Dec 2023 |
| 19519 | Menoah Petroleum Inc | | Oil & Gas Operator | Dec 2024 |
| 19520 | Mentor Energy & Resources | Mentor, OH 44060 | Oil & Gas Operator | Dec 2019 |
| 19521 | Mentren Corporation | | Gas Operator | Dec 2025 |
| 19522 | Mep Operating LLC | Houston, TX 77056-2733 | Oil & Gas Operator | Aug 2025 |
| 19523 | Mer Resources | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 19524 | Mer Resources Inc | Edmond, OK 73013-7662 | Oil & Gas Operator | Mar 2015 |
| 19525 | Mer-Bar Exploration Co Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 1992 |
| 19526 | Mercantile Oil & Gas Prod. Corp. | Galena Park, TX 77547 | Oil & Gas Operator | Jun 2016 |
| 19527 | Mercer Oil And Gas Co Inc | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 19528 | Mercer Pet Management Inc | Edmond, OK 73013-6677 | Oil & Gas Operator | Jan 2011 |
| 19529 | Mercury Exploration Co. | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 19530 | Mercury Operating, LLC | Dallas, TX 75208 | Oil & Gas Operator | Feb 2026 |
| 19531 | Mercury Petroleum Company, Inc | | Oil Operator | Dec 2018 |
| 19532 | Mercury Resources LLC | | Oil & Gas Operator | Dec 2025 |
| 19533 | Mercy Oil And Gas, LP | Aransas Pass, TX 78335 | Oil & Gas Operator | Feb 2026 |
| 19534 | Meredith Enterprises | | Oil Operator | Jun 1988 |
| 19535 | Mereken Energy Corp. | Fort Worth, TX 76102 | Gas Operator | Feb 2006 |
| 19536 | Merelco Inc | Seminole, OK 74868 | Oil Operator | Jun 2014 |
| 19537 | Merenco | Midland, TX 79702 | Oil & Gas Operator | Dec 1996 |
| 19538 | Merex Resources, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Sep 2019 |
| 19539 | Meridian Energy Company | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2010 |
| 19540 | Meridian Energy Inc. | | Oil Operator | Sep 2025 |
| 19541 | Meridian Exploration Inc | Oklahoma City, OK 73128 | Oil & Gas Operator | Aug 2013 |
| 19542 | Meridian Exploration Corp. | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2021 |
| 19543 | Meridian Interests, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Aug 2003 |
| 19544 | Meridian Oil & Gas Enter | Blairsville, PA 15717 | Oil & Gas Operator | Dec 2004 |
| 19545 | Meridian Oil & Gas Enterprises Inc | Blairsville, PA 15717-0337 | Oil & Gas Operator | Dec 2003 |
| 19546 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 19547 | Meridian Oil Inc.-Midland | Midland, TX 79702 | Oil & Gas Operator | Jul 1996 |
| 19548 | Meridian Oil Offshore Inc. | | Oil & Gas Operator | Aug 1996 |
| 19549 | Meridian Oil Production Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 2024 |
| 19550 | Meridian Production Services LLC | | Oil Operator | Dec 2016 |
| 19551 | Meridian Resource & Expl Co, The | Houston, TX 77077 | Oil & Gas Operator | Dec 2000 |
| 19552 | Meridian Resource & Expl LLC,The | Houston, TX 77094 | Oil & Gas Operator | Nov 2012 |
| 19553 | Meridian Resources (USA) Inc. | | Oil & Gas Operator | Aug 2024 |
| 19554 | Merimac Investments, Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Jan 1997 |
| 19555 | Merit Energy Co. Dba Alabama Merit Energy Co., Inc. | | Oil & Gas Operator | Aug 2005 |
| 19556 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 19557 | Merit Energy Company, LLC | Dallas, TX 75009 | Oil & Gas Operator | Sep 2025 |
| 19558 | Merit Field LLC | | Oil & Gas Operator | Dec 2001 |
| 19559 | Merit Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | May 1994 |
| 19560 | Merit Productions | | Oil Operator | Sep 1996 |
| 19561 | Meritage Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | May 2013 |
| 19562 | Meritage Energy Partners LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 19563 | Meritage Homes Of California Inc. | | Oil Operator | Dec 2020 |
| 19564 | Merkaz Drilling, LLC | Dallas, TX 75229 | Oil Operator | Feb 2026 |
| 19565 | Merkin LLC | Austin, TX 78737 | Oil Operator | Feb 2026 |
| 19566 | Merl Wiggins Et Al | | Oil & Gas Operator | Sep 1996 |
| 19567 | Merlin J Verret | | Gas Operator | Jun 1986 |
| 19568 | Merlon Texas, Inc. | Houston, TX 77056 | Oil Operator | Jun 2013 |
| 19569 | Mermac Operating Company Inc | Norman, OK 73072 | Oil & Gas Operator | Mar 2015 |
| 19570 | Meroda Resources LLC | Mustang, OK 73064-9408 | Oil & Gas Operator | Apr 2000 |
| 19571 | Merrick Oil & Gas | | Oil & Gas Operator | Sep 2025 |
| 19572 | Merrick Ward S Inc | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2001 |
| 19573 | Merrico Resource | | Oil Operator | Dec 1996 |
| 19574 | Merrico Resources | | Oil Operator | Mar 1992 |
| 19575 | Merrico Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2008 |
| 19576 | Merrill Natural Res Inc | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 1985 |
| 19577 | Merrill Operating, LLC | Snyder, TX 79550 | Oil Operator | Apr 2016 |
| 19578 | Merrill, Brian G. | Depew, NY 14043 | Gas Operator | Dec 2024 |
| 19579 | Merrimac Energy Corp. | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 19580 | Merrimac Oil & Gas LLC | Houston, TX 77054 | Gas Operator | Dec 2008 |
| 19581 | Merrion & Bayless | Farmington, NM 87401 | Oil & Gas Operator | May 1982 |
| 19582 | Merrion Oil & Gas Corp | Farmington, NM 87401 | Oil & Gas Operator | Dec 2025 |
| 19583 | Merritt Oil Comp | | Oil Operator | Jan 1990 |
| 19584 | Merritt Operating, Inc. | Mineola, TX 75773 | Oil & Gas Operator | Feb 2026 |
| 19585 | Merritt, William Kevin | Dallas, TX 75225 | Oil & Gas Operator | Dec 1994 |
| 19586 | Mert Development Inc | | Oil & Gas Operator | Dec 2021 |
| 19587 | Merta, Mike | Alice, TX 78333 | Oil & Gas Operator | Aug 2005 |
| 19588 | Mertz Energy LLC | Houston, TX 77098 | Oil & Gas Operator | Jan 2025 |
| 19589 | Mervin Troyer | Union City, PA 16438-8510 | Gas Operator | Dec 2008 |
| 19590 | Mervine Oil Company Inc | Blackwell, OK 74631-0514 | Oil Operator | Jan 2013 |
| 19591 | Merzbacher, George F. Jr. | Robstown, TX 78380 | Oil & Gas Operator | May 1994 |
| 19592 | Mesa Chica Corp. | San Antonio, TX 78278 | Oil & Gas Operator | May 2018 |
| 19593 | Mesa Energy, Inc. | Austin, TX 78755 | Oil & Gas Operator | Dec 2013 |
| 19594 | Mesa Exploration Company Inc | Shawnee, OK 74801 | Oil & Gas Operator | Nov 2025 |
| 19595 | Mesa Gulf Coast LLC | | Oil & Gas Operator | Dec 2020 |
| 19596 | Mesa Operating Co. | Irving, TX 75039 | Oil & Gas Operator | Aug 1997 |
| 19597 | Mesa Operating L | | Oil & Gas Operator | Dec 1996 |
| 19598 | Mesa Operating LP | Irving, TX 75039-3746 | Oil & Gas Operator | Oct 2010 |
| 19599 | Mesa Operating LTD Partnership | Amarillo, TX 79189 | Oil & Gas Operator | May 1994 |
| 19600 | Mesa Operating, LLC | Plano, TX 75093 | Oil & Gas Operator | Feb 2026 |