| 18401 | Meeker & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2026 |
| 18402 | Meeker, Dan Management, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Aug 2007 |
| 18403 | Meeks, Mike | Tulsa, OK 74136 | Oil Operator | Jan 2025 |
| 18404 | Meerkat Logistics And Operations LLC | Tuscaloosa, AL 35401 | Oil Operator | Jan 2026 |
| 18405 | Mega Drilling Company | | Oil Operator | Feb 1984 |
| 18406 | Mega Energy LLC | Gillette, WY 82718 | Gas Operator | Apr 2026 |
| 18407 | Mega Petroleum C | | Oil Operator | Jun 1990 |
| 18408 | Mega Resources Inc | Dallas, TX 75225-0186 | Oil & Gas Operator | Jan 2001 |
| 18409 | Megadon Enterprises, Inc | Salt Lake City, UT 84121 | Oil Operator | May 2020 |
| 18410 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 18411 | Megan Oil & Gas Co., Inc. | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 18412 | Megargel Drilling Company | Megargel, TX 76370 | Oil Operator | Nov 1998 |
| 18413 | Megas Corp | North Ridgevill, OH 44039 | Oil & Gas Operator | Dec 1984 |
| 18414 | Megg, L.P. | Borger, TX 79008 | Oil & Gas Operator | Jun 2026 |
| 18415 | Mego Resources, LLC | Taft, TX 78390 | Oil & Gas Operator | Jun 2026 |
| 18416 | Mehaffey Investments, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Jun 2026 |
| 18417 | Mei Operating Company | Lafayette, LA 70598 | Oil & Gas Operator | Aug 1997 |
| 18418 | Meier Joe Oil Op | | Oil Operator | Jul 1983 |
| 18419 | Mel Cox Transports Inc | Comanche, OK 73529-7640 | Oil & Gas Operator | Jul 2022 |
| 18420 | Mel-Ray Oil Company | Nowata, OK 74048-0149 | Oil & Gas Operator | Mar 2004 |
| 18421 | Melanie Oil Dril USA Inc | Millersburg, OH 44654 | Oil & Gas Operator | Dec 1989 |
| 18422 | Melcar Production | Tuscola, TX 79562 | Oil & Gas Operator | Jun 2026 |
| 18423 | Meleen, Catherine M. & Ruch, Jerry E. | Westfield, NY 14787 | Gas Operator | Dec 2024 |
| 18424 | Melland Drilling | | Oil Operator | Nov 1992 |
| 18425 | Mellenco Inc | Scottsdale, AZ 85253 | Oil & Gas Operator | Dec 1990 |
| 18426 | Mello-Dy Resources, LLC | Devine, TX 78016 | Oil Operator | Jun 2026 |
| 18427 | Mellon Creek Operating Co. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1993 |
| 18428 | Mellon Oil Unit | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 18429 | Melren Oil & Gas Expl., Inc. | | Gas Operator | Nov 1989 |
| 18430 | Melrose Group In | | Oil Operator | Feb 1994 |
| 18431 | Melrose Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2011 |
| 18432 | Mels Water Service Inc | Lysite, WY 82642 | Oil Operator | Mar 2013 |
| 18433 | Melson Oil & Gas Inc | Broken Arrow, OK 74014 | Oil & Gas Operator | Feb 2026 |
| 18434 | Melton Operating Co. | Friendswood, TX 77546 | Oil & Gas Operator | Jul 2005 |
| 18435 | Melton, Joe, DRLG. Co., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 18436 | Melton, Kenneth | Wann, OK 74083 | Oil Operator | Feb 2026 |
| 18437 | Meltzer Oil Comp | | Oil Operator | Dec 1983 |
| 18438 | Melvin Or Kathleen Turnbow | Portales, NM 88130 | Oil & Gas Operator | Mar 2006 |
| 18439 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |
| 18440 | Mem Partnership LP, A General Partnership | Spring, TX 77393 | Oil Operator | Feb 2026 |
| 18441 | Memaca Petroleum Corporation | | Oil & Gas Operator | Jan 1990 |
| 18442 | Memorial Exploration Company | Saint Louis, MO 63105 | Oil & Gas Operator | Aug 1996 |
| 18443 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 18444 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 18445 | Mendell Davis Gas Partners LLC | | Oil & Gas Operator | Dec 2013 |
| 18446 | Mendell Finisterre II LLC | | Oil & Gas Operator | Jun 2017 |
| 18447 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 18448 | Meng Oper & Expl Co | | Oil & Gas Operator | Dec 1989 |
| 18449 | Meng, Charles H | Lexington, KY 40502 | Gas Operator | Dec 2024 |
| 18450 | Menoah Petroleum Inc | | Oil & Gas Operator | Dec 2024 |
| 18451 | Mentren Corporation | | Gas Operator | Mar 2026 |
| 18452 | Mep Operating LLC | Houston, TX 77056-2733 | Oil & Gas Operator | Aug 2025 |
| 18453 | Mer Resources | Edmond, OK 73013 | Oil & Gas Operator | Jun 2026 |
| 18454 | Mer Resources Inc | Edmond, OK 73013-7662 | Oil & Gas Operator | Mar 2015 |
| 18455 | Mercantile Oil & Gas Prod. Corp. | Galena Park, TX 77547 | Oil & Gas Operator | Jun 2016 |
| 18456 | Mercer Oil And Gas Co Inc | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 18457 | Mercer Pet Management Inc | Edmond, OK 73013-6677 | Oil & Gas Operator | Jan 2011 |
| 18458 | Mercury Exploration Co | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 18459 | Mercury Operating, LLC | Dallas, TX 75208 | Oil & Gas Operator | Jun 2026 |
| 18460 | Mercury Petroleum Company, Inc | | Oil Operator | Dec 2018 |
| 18461 | Mercury Resources LLC | | Oil & Gas Operator | Apr 2026 |
| 18462 | Meredith Enterprises | | Oil Operator | Jun 1988 |
| 18463 | Mereken Energy Corp. | Fort Worth, TX 76102 | Gas Operator | Feb 2006 |
| 18464 | Merelco Inc | Seminole, OK 74868 | Oil Operator | Jun 2014 |
| 18465 | Merenco | Midland, TX 79702 | Oil & Gas Operator | Dec 1996 |
| 18466 | Merex Resources, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Sep 2019 |
| 18467 | Meridian Energy Company | Cambridge, OH 43725 | Oil & Gas Operator | Dec 2010 |
| 18468 | Meridian Energy Inc. | | Oil Operator | Feb 2026 |
| 18469 | Meridian Exploration Inc | Oklahoma City, OK 73128 | Oil & Gas Operator | Aug 2013 |
| 18470 | Meridian Exploration Corp. | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2021 |
| 18471 | Meridian Interests, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Aug 2003 |
| 18472 | Meridian Oil & Gas Enter | Blairsville, PA 15717 | Oil & Gas Operator | Dec 2004 |
| 18473 | Meridian Oil & Gas Enterprises Inc | Blairsville, PA 15717-0337 | Oil & Gas Operator | Dec 2003 |
| 18474 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 18475 | Meridian Oil Inc.-Midland | Midland, TX 79702 | Oil & Gas Operator | Jul 1996 |
| 18476 | Meridian Oil Offshore Inc. | | Oil & Gas Operator | Aug 1996 |
| 18477 | Meridian Oil Production Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 2024 |
| 18478 | Meridian Production Services LLC | | Oil & Gas Operator | Apr 2026 |
| 18479 | Meridian Resource & Expl Co, The | Houston, TX 77077 | Oil & Gas Operator | Dec 2000 |
| 18480 | Meridian Resource & Expl LLC,The | Houston, TX 77094 | Oil & Gas Operator | Nov 2012 |
| 18481 | Meridian Resources (USA) Inc. | | Oil & Gas Operator | Aug 2024 |
| 18482 | Meridian Resources LLC | Evansville, IN 47715 | Oil Operator | Jul 2024 |
| 18483 | Merimac Investments, Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Jan 1997 |
| 18484 | Merit Energy Co. Dba Alabama Merit Energy Co., Inc. | | Oil & Gas Operator | Aug 2005 |
| 18485 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Jun 2026 |
| 18486 | Merit Energy Company, LLC | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 18487 | Merit Field LLC | | Oil & Gas Operator | Dec 2001 |
| 18488 | Merit Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | May 1994 |
| 18489 | Merit Productions | | Oil Operator | Sep 1996 |
| 18490 | Meritage Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | May 2013 |
| 18491 | Meritage Energy Partners LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 18492 | Meritage Homes Of California Inc. | | Oil Operator | Dec 2020 |
| 18493 | Merkaz Drilling, LLC | Dallas, TX 75229 | Oil Operator | Jun 2026 |
| 18494 | Merkin LLC | Austin, TX 78737 | Oil Operator | Jun 2026 |
| 18495 | Merl Wiggins Et Al | | Oil & Gas Operator | Sep 1996 |
| 18496 | Merlon Texas, Inc. | Houston, TX 77056 | Oil Operator | Jun 2013 |
| 18497 | Mermac Operating Company Inc | Norman, OK 73072 | Oil & Gas Operator | Mar 2015 |
| 18498 | Meroda Resources LLC | Mustang, OK 73064-9408 | Oil & Gas Operator | Apr 2000 |
| 18499 | Merrick Oil & Gas | | Oil & Gas Operator | Jan 2026 |
| 18500 | Merrick Ward S Inc | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2001 |