| 18301 | M E W Enterprise | Roswell, NM 88203 | Oil & Gas Operator | Aug 2024 |
| 18302 | M G Energy LLC | Cushing, OK 74023 | Oil & Gas Operator | Nov 2025 |
| 18303 | M G Gulff | | Oil Operator | May 1988 |
| 18304 | M G Production Co | Rock Springs, WY 82901 | Oil Operator | Dec 1999 |
| 18305 | M H Oil & Gas | Chanute, KS 66720 | Oil & Gas Operator | Aug 1998 |
| 18306 | M H Oil & Gas LLC | Okeene, OK 73763-0684 | Oil & Gas Operator | Feb 2013 |
| 18307 | M H W, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Jul 1996 |
| 18308 | M IV Ops., Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 1998 |
| 18309 | M J M D Inc | Burlington, IA 52601 | Oil Operator | Jan 2013 |
| 18310 | M K M LTD | | Oil Operator | Jun 1998 |
| 18311 | M K M Oil Company | Casper, WY 82602 | Oil & Gas Operator | Jun 1996 |
| 18312 | M K W Inc | Oklahoma City, OK 73112-8884 | Oil & Gas Operator | Dec 2009 |
| 18313 | M L Energy | | Oil Operator | Feb 2015 |
| 18314 | M L Energy LLC | | Oil Operator | Oct 2016 |
| 18315 | M L Mayfield Petroleum Corp. | | Oil & Gas Operator | Aug 1991 |
| 18316 | M M Energy Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Nov 2025 |
| 18317 | M M Resources In | | Gas Operator | Feb 1990 |
| 18318 | M P O'Meara, Jr. Inc. | | Oil & Gas Operator | Sep 2000 |
| 18319 | M R C J Oil Co | Mannford, OK 74044 | Oil & Gas Operator | Apr 1993 |
| 18320 | M R Drilling Company | Monahans, TX 79756 | Oil & Gas Operator | Feb 1998 |
| 18321 | M R Schalk | Albuquerque, NM 87125 | Oil & Gas Operator | Jul 2022 |
| 18322 | M R Ventures LLC | Dallas, TX 75367 | Oil Operator | Dec 2016 |
| 18323 | M S B Company | Slaton, TX 79364 | Oil & Gas Operator | Dec 2016 |
| 18324 | M S Drilling Company | | Oil Operator | Feb 2025 |
| 18325 | M S Exploration Inc | Lexington, OH 44904-9510 | Oil & Gas Operator | Dec 1999 |
| 18326 | M T M Oil | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 18327 | M T W Oil Co | Terral, OK 73569 | Oil Operator | Jun 2014 |
| 18328 | M V Crum Gas Partners | Paintsville, KY 41240 | Gas Operator | Dec 2021 |
| 18329 | M V Production Co | | Oil & Gas Operator | Jun 1990 |
| 18330 | M V Ventures, G. P. | | Oil & Gas Operator | Dec 2000 |
| 18331 | M W Petroleum Company | Houston, TX 77056 | Oil & Gas Operator | Dec 1995 |
| 18332 | M W Production Co. | New Braunfels, TX 78130 | Oil & Gas Operator | Aug 2003 |
| 18333 | M&M Energy, LLC | El Paso, TX 79902 | Oil Operator | Dec 2020 |
| 18334 | M&M Oil, LLC | Artesia, NM 88210254 | Oil & Gas Operator | Dec 2025 |
| 18335 | M&M Services LLC | Neodesha, KS 66757 | Gas Operator | Sep 2025 |
| 18336 | M'Red Petroleum, LLC | Pampa, TX 79065 | Oil & Gas Operator | Dec 2010 |
| 18337 | M-2 Oil Company | Wichita Falls, TX 76306 | Oil & Gas Operator | May 2006 |
| 18338 | M-3 Industries | Casper, WY 82602 | Oil & Gas Operator | Dec 2025 |
| 18339 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Feb 2026 |
| 18340 | M-B SWD Inc | Crescent, OK 73028-0533 | Oil Operator | Jul 1997 |
| 18341 | M-C Production & Drilling Co,Inc | Longview, TX 75608 | Oil & Gas Operator | Feb 2026 |
| 18342 | M-Five Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Apr 2002 |
| 18343 | M-G Gas Company, Inc. | Plano, TX 75086 | Oil & Gas Operator | Jun 1999 |
| 18344 | M-J Oil And Gas LLC | Wilson, OK 73463 | Oil & Gas Operator | May 2023 |
| 18345 | M-J Oil Company Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2008 |
| 18346 | M-P Petroleum, Inc. | McPherson, KS 67460 | Oil & Gas Operator | Jan 2013 |
| 18347 | M-S-C Corporation | Houston, TX 77027 | Oil Operator | May 1994 |
| 18348 | M-T Petroleum, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Mar 2008 |
| 18349 | M-Tex Oil, LLC | Williston, ND 58803 | Oil Operator | Dec 2025 |
| 18350 | M-Tex Resources, Inc. | Merkel, TX 79536 | Oil & Gas Operator | Feb 2026 |
| 18351 | M-V Company | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 18352 | M-W-D Oil Co. | Odessa, TX 79760 | Oil & Gas Operator | Jul 1999 |
| 18353 | M-X Oil & Gas, Inc. | | Oil & Gas Operator | Jun 1993 |
| 18354 | M. A. B. Production | | Oil Operator | Nov 2009 |
| 18355 | M. A. Robison | | Oil & Gas Operator | Oct 1998 |
| 18356 | M. B. And D. I. Dupree | | Oil Operator | Nov 1992 |
| 18357 | M. D. & G. Partnership | | Oil & Gas Operator | Dec 1996 |
| 18358 | M. E. Fitzgerald | | Oil & Gas Operator | May 1993 |
| 18359 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Feb 2026 |
| 18360 | M. F. McCain, Inc. | | Oil & Gas Operator | Jul 1987 |
| 18361 | M. Grace, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Feb 2026 |
| 18362 | M. H. Thomson | | Gas Operator | Dec 2014 |
| 18363 | M. H. Whittier Energy LLC | | Oil & Gas Operator | Sep 1996 |
| 18364 | M. H.Marr | | Oil & Gas Operator | Mar 1998 |
| 18365 | M. J. G., Inc. | Alice, TX 78333 | Oil & Gas Operator | Jul 2010 |
| 18366 | M. J. McCaffery Oil Co. | Allegany, NY 14706 | Oil Operator | Dec 2017 |
| 18367 | M. J. T. Enterprises | | Oil Operator | Sep 2025 |
| 18368 | M. K. Fuhrman LLC | | Oil Operator | Sep 2025 |
| 18369 | M. K. Production | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2008 |
| 18370 | M. L. Mayfield | | Oil & Gas Operator | Oct 1990 |
| 18371 | M. L. Mayfield Co. | | Oil & Gas Operator | Aug 1991 |
| 18372 | M. M. & M. Resources, Inc. | Wetumka, OK 74883 | Oil & Gas Operator | Apr 2020 |
| 18373 | M. M. Miller & Sons, LTD. | Alice, TX 78333 | Oil & Gas Operator | Jan 2023 |
| 18374 | M. P. O'Meara Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 18375 | M. P. S. Prod. Co. | Houston, TX 77225 | Oil & Gas Operator | Dec 1996 |
| 18376 | M. Parker Production Co. | | Oil Operator | Dec 2024 |
| 18377 | M. S. Delone | | Oil Operator | Nov 1990 |
| 18378 | M. S. Productions, Inc. | Pittsburg, KS 66762 | Oil & Gas Operator | Nov 2019 |
| 18379 | M. T. R. Production | | Oil Operator | Mar 2006 |
| 18380 | M. W. Maxwell | | Oil & Gas Operator | Apr 1990 |
| 18381 | M.A. Yost Operations, Inc | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 18382 | M.A.E. Resources, Inc. | Parker, KS 66072 | Oil Operator | Sep 2011 |
| 18383 | M.A.R.S. Energy | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 18384 | M.B. Properties, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Oct 1995 |
| 18385 | M.B.J. Operating | Argyle, TX 76226 | Oil & Gas Operator | Jun 2022 |
| 18386 | M.C.E. Trust Group, A General Partnership | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2009 |
| 18387 | M.D. Skroopka Operating, LLC | Oakland, CA 94611 | Oil & Gas Operator | Feb 2026 |
| 18388 | M.J. Bernos, Jr./PKR Oil, Inc. | | Gas Operator | Aug 1990 |
| 18389 | M.J.O.G., Inc. | Fort Smith, AR 72903 | Oil Operator | Mar 2015 |
| 18390 | M.O.K.A.T. | Bartlesville, OK 74003 | Oil Operator | Jun 2001 |
| 18391 | M.R.M. Operating, Inc. | Midland, TX 79707 | Oil & Gas Operator | Aug 2003 |
| 18392 | M.T.M. Petroleum | | Oil & Gas Operator | Oct 1995 |
| 18393 | M2 Louisiana Gas Service, LLC | | Oil Operator | Apr 2010 |
| 18394 | M2 Squared Operating, LLC | Rockwall, TX 75032 | Oil Operator | Feb 2026 |
| 18395 | M2S Oil LLC | | Oil Operator | Oct 2025 |
| 18396 | M3 Helium Corp | | Gas Operator | Sep 2025 |
| 18397 | M3V Energy, LLC | Perryton, TX 79070 | Oil & Gas Operator | Feb 2026 |
| 18398 | M4 Energy, LLC | Watsontown, PA 17777-1133 | Oil & Gas Operator | Dec 2025 |
| 18399 | M5 Standing Energy, LLC | Decatur, TX 76234 | Oil & Gas Operator | Feb 2026 |
| 18400 | M5oexit, LLC | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |