| 18001 | M G Energy LLC | Cushing, OK 74023 | Oil Operator | Jan 2025 |
| 18002 | M G Gulff | | Oil Operator | May 1988 |
| 18003 | M G Oil Inc | Russell, KS 67665 | Oil Operator | Dec 2024 |
| 18004 | M G Production Co | Rock Springs, WY 82901 | Oil Operator | Dec 1999 |
| 18005 | M G U Development Co | | Oil & Gas Operator | Jun 1987 |
| 18006 | M G U Development Co And Mask Thomas B And Ma020 | | Oil & Gas Operator | Jun 1987 |
| 18007 | M H Oil & Gas | Chanute, KS 66720 | Oil & Gas Operator | Aug 1998 |
| 18008 | M H Oil & Gas LLC | Okeene, OK 73763-0684 | Oil & Gas Operator | Feb 2013 |
| 18009 | M H W, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Jul 1996 |
| 18010 | M IV Ops., Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 1998 |
| 18011 | M J M D Inc | Burlington, IA 52601 | Oil Operator | Jan 2013 |
| 18012 | M K M LTD | | Oil & Gas Operator | Jun 1998 |
| 18013 | M K M Oil Company | Casper, WY 82602 | Oil & Gas Operator | Jun 1996 |
| 18014 | M K Oil Company | Gillette, WY 82717-3470 | Oil & Gas Operator | Jan 2025 |
| 18015 | M K W Inc | Oklahoma City, OK 73112-8884 | Oil & Gas Operator | Dec 2009 |
| 18016 | M L Energy | | Oil Operator | Feb 2015 |
| 18017 | M L Energy LLC | | Oil Operator | Oct 2024 |
| 18018 | M L Mayfield Petroleum Corp. | | Oil & Gas Operator | Aug 1991 |
| 18019 | M M & M Resources Inc | Wetumka, OK 74883 | Oil & Gas Operator | Apr 2020 |
| 18020 | M M Energy, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Jan 2025 |
| 18021 | M M Resources In | | Gas Operator | Feb 1990 |
| 18022 | M M Resources, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2018 |
| 18023 | M P O'Meara, Jr. Inc. | | Oil & Gas Operator | Sep 2000 |
| 18024 | M R Drilling Company | Monahans, TX 79756 | Oil & Gas Operator | Feb 1998 |
| 18025 | M R Schalk | Albuquerque, NM 87125 | Oil & Gas Operator | Jul 2022 |
| 18026 | M R Ventures LLC | Dallas, TX 75367 | Oil & Gas Operator | Jan 2025 |
| 18027 | M S B Company | Slaton, TX 79364 | Oil & Gas Operator | Dec 2016 |
| 18028 | M S Drilling Company | | Oil Operator | Dec 2024 |
| 18029 | M S Exploration Inc | Lexington, OH 44904-9510-9510 | Oil & Gas Operator | Dec 1999 |
| 18030 | M T M Oil | Monahans, TX 79756 | Oil & Gas Operator | Apr 2025 |
| 18031 | M T W Oil Co | Terral, OK 73569 | Oil Operator | Jun 2014 |
| 18032 | M V Crum Gas Partners | Paintsville, KY 41240 | Gas Operator | Dec 2021 |
| 18033 | M V Production Co | | Oil & Gas Operator | Jun 1990 |
| 18034 | M V Purchasing LLC | Wichita, KS 67202 | Oil & Gas Operator | Jan 2025 |
| 18035 | M V Ventures, G. P. | | Oil & Gas Operator | Dec 2000 |
| 18036 | M W Petroleum Company | Houston, TX 77056 | Oil & Gas Operator | Dec 1995 |
| 18037 | M W Production Co. | New Braunfels, TX 78130 | Oil & Gas Operator | Aug 2003 |
| 18038 | M&M Energy, LLC | El Paso, TX 79902 | Oil Operator | Dec 2020 |
| 18039 | M&M Oil, LLC | Artesia, NM 88210254 | Oil & Gas Operator | Feb 2025 |
| 18040 | M&M Services LLC | Neodesha, KS 66757 | Gas Operator | Dec 2024 |
| 18041 | M'Red Petroleum, LLC | Pampa, TX 79065 | Oil & Gas Operator | Dec 2010 |
| 18042 | M-2 Oil Company | Wichita Falls, TX 76306 | Oil & Gas Operator | May 2006 |
| 18043 | M-3 Industries | Casper, WY 82602 | Oil & Gas Operator | Dec 2024 |
| 18044 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Apr 2025 |
| 18045 | M-B SWD Inc | Crescent, OK 73028-0533 | Oil Operator | Jul 1997 |
| 18046 | M-C Production & Drilling Co,Inc | Longview, TX 75608 | Oil & Gas Operator | Apr 2025 |
| 18047 | M-Five Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Apr 2002 |
| 18048 | M-G Gas Company, Inc. | Plano, TX 75086 | Oil & Gas Operator | Jun 1999 |
| 18049 | M-P Petroleum, Inc. | McPherson, KS 67460 | Oil & Gas Operator | Jan 2013 |
| 18050 | M-S-C Corporation | Houston, TX 77027 | Oil Operator | May 1994 |
| 18051 | M-T Petroleum, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Mar 2008 |
| 18052 | M-Tex Resources, Inc. | Merkel, TX 79536 | Oil & Gas Operator | Apr 2025 |
| 18053 | M-V Company | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 18054 | M-W-D Oil Co. | Odessa, TX 79760 | Oil & Gas Operator | Jul 1999 |
| 18055 | M. A. B. Production | | Oil Operator | Nov 2009 |
| 18056 | M. A. Robison | | Oil & Gas Operator | Oct 1998 |
| 18057 | M. B. And D. I. Dupree | | Oil Operator | Nov 1992 |
| 18058 | M. D. & G. Partnership | | Oil & Gas Operator | Dec 1996 |
| 18059 | M. E. Fitzgerald | | Oil & Gas Operator | May 1993 |
| 18060 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Apr 2025 |
| 18061 | M. F. McCain, Inc. | | Oil & Gas Operator | Jul 1987 |
| 18062 | M. Grace, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Apr 2025 |
| 18063 | M. H. Whittier Energy LLC | | Oil & Gas Operator | Sep 1996 |
| 18064 | M. H.Marr | | Oil & Gas Operator | Mar 1998 |
| 18065 | M. J. G., Inc. | Alice, TX 78333 | Oil & Gas Operator | Jul 2010 |
| 18066 | M. J. McCaffery Oil Co. | Allegany, NY 14706 | Oil Operator | Dec 2017 |
| 18067 | M. J. T. Enterprises | | Oil Operator | Dec 2024 |
| 18068 | M. K. Fuhrman LLC | | Oil Operator | Nov 2024 |
| 18069 | M. K. Production | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2008 |
| 18070 | M. L. Mayfield | | Oil & Gas Operator | Oct 1990 |
| 18071 | M. L. Mayfield Co. | | Oil & Gas Operator | Aug 1991 |
| 18072 | M. P. O'Meara Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 18073 | M. P. S. Prod. Co. | Houston, TX 77225 | Oil & Gas Operator | Dec 1996 |
| 18074 | M. Parker Production Co. | | Oil Operator | Dec 2024 |
| 18075 | M. S. Delone | | Oil Operator | Nov 1990 |
| 18076 | M. S. Productions, Inc. | Pittsburg, KS 66762 | Oil & Gas Operator | Nov 2019 |
| 18077 | M. T. R. Production | | Oil Operator | Mar 2006 |
| 18078 | M. W. Maxwell | | Oil & Gas Operator | Apr 1990 |
| 18079 | M.A. Yost Operations, Inc | Russell, KS 67665 | Oil Operator | Dec 2024 |
| 18080 | M.A.E. Resources, Inc. | Parker, KS 66072 | Oil Operator | Sep 2011 |
| 18081 | M.A.R.S. Energy | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 18082 | M.B. Properties, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Oct 1995 |
| 18083 | M.B.J. Operating | Argyle, TX 76226 | Oil & Gas Operator | Jun 2022 |
| 18084 | M.C.E. Trust Group, A General Partnership | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2009 |
| 18085 | M.D. Skroopka Operating, LLC | Oakland, CA 94611 | Oil & Gas Operator | Apr 2025 |
| 18086 | M.J. Bernos, Jr./PKR Oil, Inc. | | Gas Operator | Aug 1990 |
| 18087 | M.J.O.G., Inc. | Fort Smith, AR 72903 | Oil Operator | Mar 2015 |
| 18088 | M.O.K.A.T. | Bartlesville, OK 74003 | Oil Operator | Jun 2001 |
| 18089 | M.R.M. Operating, Inc. | Midland, TX 79707 | Oil & Gas Operator | Aug 2003 |
| 18090 | M.T. Oil Co. | Copan, OK 74022 | Oil Operator | Dec 2024 |
| 18091 | M.T.M. Petroleum | | Oil & Gas Operator | Oct 1995 |
| 18092 | M2 Louisiana Gas Service, LLC | | Oil Operator | Apr 2010 |
| 18093 | M2 Squared Operating, LLC | Ranger, TX 76470 | Oil Operator | Apr 2025 |
| 18094 | M2S Oil LLC | | Oil Operator | Jan 2025 |
| 18095 | M3 Helium Corp | | Gas Operator | Dec 2024 |
| 18096 | M3V Energy, LLC | Perryton, TX 79070 | Oil & Gas Operator | Apr 2025 |
| 18097 | M4 Energy, LLC | Watsontown, PA 17777-1133 | Oil & Gas Operator | Dec 2024 |
| 18098 | M5 Standing Energy, LLC | Decatur, TX 76234 | Oil & Gas Operator | Apr 2025 |
| 18099 | M5oexit, LLC | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 18100 | M7 Resources LLC | Santa Fe, NM 87505 | Oil Operator | Dec 2024 |