| 1301 | Mescalero Energy, Inc. | San Antonio, TX 78231 | Oil & Gas Operator | Aug 2003 |
| 1302 | Mescko Producing & Operating Co. Inc. | Burbank, OH 44214 | Oil & Gas Operator | Dec 2023 |
| 1303 | Mesh LTD | Zanesville, OH 43701 | Oil & Gas Operator | Dec 2023 |
| 1304 | Mesquite Land & Minerals Co. | Albany, TX 76430 | Oil Operator | Apr 2024 |
| 1305 | Mesquite Oil & Gas | Olney, TX 76374 | Oil & Gas Operator | Apr 2024 |
| 1306 | Mesquite Oil & Gas Production | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 1307 | Mesquite SWD Inc | Carlsbad, NM 88221 | Oil & Gas Operator | Apr 2024 |
| 1308 | Messenger Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Dec 2023 |
| 1309 | Messer LLC | | Gas Operator | Jan 2024 |
| 1310 | Messman Corporation | Wichita, KS 67208 | Oil & Gas Operator | Dec 2023 |
| 1311 | Messman-Rinehart | | Oil & Gas Operator | Mar 1991 |
| 1312 | Messy Oil And Gas, LLC | Garwood, TX 77442 | Oil & Gas Operator | Apr 2024 |
| 1313 | Mestena Operating, L.L.C. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Aug 2015 |
| 1314 | Mestena Operating, LTD. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Jun 2009 |
| 1315 | Mestena, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Nov 2001 |
| 1316 | Metairie Energy Company, Inc. | | Oil & Gas Operator | Nov 2019 |
| 1317 | Metano Energy III, LP | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2024 |
| 1318 | Metano Energy, LP | San Antonio, TX 78216 | Oil & Gas Operator | Aug 2008 |
| 1319 | Metco Oil Corporation | Seguin, TX 78155 | Oil Operator | Apr 2016 |
| 1320 | Meteor Developments Inc | Denver, CO BAD ADDR | Oil & Gas Operator | Dec 1995 |
| 1321 | Meter, Erin L. & William J. | Dansville, NY 14437 | Gas Operator | Dec 2022 |
| 1322 | Metgas Co, A Partnership | | Oil & Gas Operator | Dec 2016 |
| 1323 | Methane Productions Inc | Recluse, WY 82725 | Oil & Gas Operator | Apr 2007 |
| 1324 | Metis Energy LLC | Friendswood, TX 77546 | Oil & Gas Operator | Apr 2024 |
| 1325 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 1326 | Metro Energy LTD | Scottsdale, AZ 85254 | Oil Operator | Aug 2000 |
| 1327 | Metro Energy, Inc. | Gladstone, MO 64118 | Oil Operator | May 1997 |
| 1328 | Metro Oil Compan | | Oil Operator | Jan 1991 |
| 1329 | Metroplex Barnett Shale LLC | Houston, TX 77001 | Gas Operator | Sep 2008 |
| 1330 | Metropolitan Resources Corp | Tulsa, OK 74169-1734 | Oil & Gas Operator | Mar 2015 |
| 1331 | Mettz,Carmody & Foster Oil Co | | Oil Operator | May 1990 |
| 1332 | Metzger Ed W & Sue | Junction City, OH 43748 | Oil Operator | Dec 2023 |
| 1333 | Metzger Francis A | Junction City, OH 43748 | Oil & Gas Operator | Dec 1999 |
| 1334 | Metzgers Bob | Junction City, OH 43748 | Oil & Gas Operator | Dec 2022 |
| 1335 | Metzner, Norma J. Estate | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 1998 |
| 1336 | Mewbourne Marketing Inc | Tyler, TX 75711 | Oil & Gas Operator | Mar 2013 |
| 1337 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Apr 2024 |
| 1338 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 1339 | Mextex Operating Company | Austin, TX 78734 | Oil & Gas Operator | Apr 2024 |
| 1340 | Meyer Douglas P | Longmont, CO 80501 | Oil & Gas Operator | Aug 2006 |
| 1341 | Meyer Oil Co., Inc. | Skellytown, TX 79080 | Oil & Gas Operator | Dec 2023 |
| 1342 | Meyer Richard C Inc | MT Gilead, OH 43338 | Oil & Gas Operator | Dec 1999 |
| 1343 | Meyer, David M. | South Wales, NY 14139 | Gas Operator | Dec 2022 |
| 1344 | Meyer, Norbert | Conway Springs, KS 67031 | Oil Operator | Aug 1994 |
| 1345 | Meyer, Ruskin H. Et Al | | Oil Operator | Oct 1980 |
| 1346 | Meyer, Theodore J. | Conway Springs, KS 67031 | Oil Operator | Dec 2023 |
| 1347 | Meyerhoff & Cox Inc | Tulsa, OK 74135-7830 | Oil Operator | Aug 1993 |
| 1348 | Meyers Marsha L | Danville, OH 43014 | Oil & Gas Operator | Dec 2007 |
| 1349 | Meyers-Lasher, Inc. | | Oil & Gas Operator | Mar 1999 |
| 1350 | MFC Drilling Inc | Coshocton, OH 43812 | Oil & Gas Operator | Dec 2022 |
| 1351 | MFP Petroleum LP | Oklahoma City, OK 73142-3017 | Gas Operator | Dec 2023 |
| 1352 | MFP Petroleum LTD. Partnership | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2017 |
| 1353 | Mga Energy Inc | Corning, OH 43730 | Oil & Gas Operator | Dec 2023 |
| 1354 | Mge Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Dec 2023 |
| 1355 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 1356 | MGM Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 1357 | MGM Oil & Gas Inc. | Ballinger, TX 76821 | Oil & Gas Operator | Apr 2024 |
| 1358 | MGM Well Service, Inc. | Corpus Chrsti, TX 78427 | Oil & Gas Operator | Oct 2004 |
| 1359 | MGN Development Co | Belpre, OH 45714 | Oil & Gas Operator | Dec 2023 |
| 1360 | MH Oilfield Service LLC | Amesville, OH 45711 | Oil & Gas Operator | Dec 2022 |
| 1361 | MHM Oil Co. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2002 |
| 1362 | MHM Pipeline Co., Inc. | Dallas, TX 75252 | Oil & Gas Operator | Apr 2024 |
| 1363 | Mi-Co Oil & Gas LLC | Caddo, TX 76429 | Oil Operator | Apr 2024 |
| 1364 | Miami Oil Producers Inc | Reno, NV 89501 | Oil & Gas Operator | Dec 2012 |
| 1365 | Mica Energy Corp. | Lincoln, NE 68516 | Oil & Gas Operator | Dec 2010 |
| 1366 | Mich Geosearch/Eagle O&G | Wichita Falls, TX 76308-1061-1061 | Oil & Gas Operator | Dec 2001 |
| 1367 | Mich-La Oil & Gas Exploration | | Oil & Gas Operator | Jan 1992 |
| 1368 | Michael D Brown | | Oil Operator | Jul 1993 |
| 1369 | Michael D. Traylor LLC | El Dorado, KS 67042 | Oil Operator | Dec 2023 |
| 1370 | Michael D. Weilert Oil Company | | Oil Operator | Dec 2023 |
| 1371 | Michael Goodnight Operating LLC | Saint Louis, OK 74866-0051 | Oil & Gas Operator | Dec 2023 |
| 1372 | Michael Petr. & Hurd Ent., LTD. | Houston, TX 77056 | Oil & Gas Operator | Oct 1993 |
| 1373 | Michael Petroleum Corporation | Houston, TX 77040 | Oil & Gas Operator | Dec 2001 |
| 1374 | Michael W Mills | | Oil Operator | Jul 2007 |
| 1375 | Michaelis Leo Oi | | Oil Operator | Aug 1991 |
| 1376 | Michaels, Bobby W | | Oil Operator | Nov 1998 |
| 1377 | Michaelson Producing Company | MC Camey, TX 79752 | Oil & Gas Operator | Apr 2024 |
| 1378 | Michel T. Halbouty | | Oil & Gas Operator | Dec 1996 |
| 1379 | Michel T. Halbouty Energy Co. | | Oil & Gas Operator | Nov 1986 |
| 1380 | Michigan Gas Utilities Co | | Oil & Gas Operator | Mar 2011 |
| 1381 | Michigan Geosearch Inc | Lansing, MI 48917 | Oil & Gas Operator | Dec 2023 |
| 1382 | Michigan Oil Co. | FT Worth, TX 76117 | Oil & Gas Operator | Feb 1998 |
| 1383 | Michigan Petroleum Exploration Inc | | Oil & Gas Operator | Oct 2005 |
| 1384 | Michigan Production Co LLC | | Oil & Gas Operator | Oct 2002 |
| 1385 | Michigan-Wisconsin Pipe Line Co | | Oil & Gas Operator | Dec 1983 |
| 1386 | Mickalson Operating Company | Cleveland, OK 74020 | Oil & Gas Operator | Jan 2024 |
| 1387 | Mickalson Petroleum Company | | Oil & Gas Operator | Mar 1993 |
| 1388 | Mico Oil & Gas | Paola, KS 66071 | Oil Operator | Aug 1995 |
| 1389 | Micro Oil, LLC | Casa Grande, AZ 85193 | Oil Operator | Dec 2023 |
| 1390 | Micro Operating, Inc. | Bryan, TX 77807 | Oil & Gas Operator | Apr 2024 |
| 1391 | Micron Minerals Company | | Oil & Gas Operator | Sep 1988 |
| 1392 | Mid Amer Natural Resources Inc | Erie, PA 16505-4760 | Gas Operator | Dec 1994 |
| 1393 | Mid America Ener | | Oil Operator | Nov 1993 |
| 1394 | Mid Atlantic Oil Co | Hillsdale, MI 49242 | Oil & Gas Operator | Dec 1999 |
| 1395 | Mid Center Oil Company | | Oil & Gas Operator | Mar 2014 |
| 1396 | Mid Central Production LLC | Evanston, WY 82930 | Oil Operator | Dec 2023 |
| 1397 | Mid Con Energy Corporation | Fort Scott, KS 66701 | Oil Operator | Dec 2009 |
| 1398 | Mid Continent Resources, Inc. | Houston, TX 77060 | Oil & Gas Operator | Apr 2024 |
| 1399 | Mid East Oil Co | Indiana, PA 15701-5378 | Gas Operator | Dec 2006 |
| 1400 | Mid Field Oil Co. | | Oil & Gas Operator | Mar 1989 |