| 3901 | McCullough G W | Norman, OK 73072 | Oil & Gas Operator | Aug 2000 |
| 3902 | McCutchin Alma Estate | Dallas, TX 75380 | Oil & Gas Operator | May 2013 |
| 3903 | McDe Energy Company Inc | Enid, OK 73706 | Oil & Gas Operator | May 2009 |
| 3904 | McElroy John | Sapulpa, OK 74066-6119 | Oil & Gas Operator | Jan 2025 |
| 3905 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 3906 | McFerran Operating LLC | Seminole, OK 74868-6202 | Oil & Gas Operator | Jan 2025 |
| 3907 | McGee, Tom Corporation | Booker, TX 79005 | Oil & Gas Operator | Jan 2025 |
| 3908 | McGhee Exploration And Prod. Co. | Houston, TX 77019 | Oil & Gas Operator | Feb 2003 |
| 3909 | McGinley Jr, John R | | Gas Operator | Nov 1998 |
| 3910 | McGinley P A | Tulsa, OK 74101 | Oil & Gas Operator | Dec 1996 |
| 3911 | McGinness Energy Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Jan 2025 |
| 3912 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 3913 | McGonigal Dan L | Skiatook, OK 74070 | Oil & Gas Operator | Sep 2024 |
| 3914 | McGonigal Donald T | Tulsa, OK 74114-2145 | Oil & Gas Operator | Jul 2004 |
| 3915 | McGonigal Ted W | Norman, OK 73072-3037 | Oil & Gas Operator | Feb 2025 |
| 3916 | McGriff Craig Exploration Inc | Oklahoma City, OK 73172-0364 | Oil & Gas Operator | Mar 2023 |
| 3917 | McGuire Tom Oil Company | Depew, OK 74028 | Oil Operator | Apr 2011 |
| 3918 | McIntyre M L | Oklahoma City, OK 73154-0523 | Oil & Gas Operator | Jul 1996 |
| 3919 | McKay Oil Company | Perry, OK 73077 | Oil Operator | Nov 2008 |
| 3920 | McKee Energy Company Inc | Pawhuska, OK 74056 | Oil & Gas Operator | Apr 2011 |
| 3921 | McKenzie Petroleum Company | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 3922 | McKinney Kenneth R | Okmulgee, OK 74447-6932 | Oil Operator | Aug 2000 |
| 3923 | McKinney Operating Company | Canadian, TX 79014 | Gas Operator | May 2002 |
| 3924 | MCM Energy Inc | Edmond, OK 73013-8035 | Oil & Gas Operator | Nov 2021 |
| 3925 | McMahon Operating Co., L.C. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2004 |
| 3926 | McMillin C C & Company Inc | Guthrie, OK 73044 | Oil & Gas Operator | Jan 2025 |
| 3927 | McMurtrie Bill Jr | Bartlesville, OK 74003 | Oil & Gas Operator | Nov 2024 |
| 3928 | McNeal & Shahan Oil Co Inc | | Oil & Gas Operator | Apr 2014 |
| 3929 | McNeal Production Inc | Perry, OK 73077-0268 | Oil & Gas Operator | Nov 2014 |
| 3930 | McNeill Randy & W R | Okmulgee, OK 74447 | Oil & Gas Operator | Nov 2013 |
| 3931 | McNic Oil & Gas Midcontinent | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | May 2024 |
| 3932 | McNutt P L | San Marcos, CA 92069-4817 | Oil & Gas Operator | Jul 1994 |
| 3933 | McO Resources Integrated Corp | Houston, TX 77057 | Oil Operator | Jan 1997 |
| 3934 | McOil Operating Company LLC | Muskogee, OK 74401 | Oil & Gas Operator | Jan 2025 |
| 3935 | McOr Oil & Gas Corp | Houston, TX 77002 | Oil & Gas Operator | Oct 2013 |
| 3936 | McQueen Ed & Company Inc | Lindsey, OK 73052 | Oil & Gas Operator | Apr 2014 |
| 3937 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
| 3938 | Me3 Oilfield Service LLC | Tulsa, OK 74136-1236 | Oil & Gas Operator | Dec 2024 |
| 3939 | Meade Energy Corporation | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Feb 2025 |
| 3940 | Meade James C | Oklahoma City, OK 73118-1544 | Gas Operator | Apr 2015 |
| 3941 | Meador Hubbell Meador Inc | Beggs, OK 74421-0794 | Oil & Gas Operator | Apr 2020 |
| 3942 | Meador Oil Company Inc | Lubbock, TX 79415 | Oil & Gas Operator | Oct 2022 |
| 3943 | Meadors Jr J W Trust | Bixby, OK 74008-0151 | Oil & Gas Operator | Aug 2013 |
| 3944 | Meadors Operating Co | Jennings, OK 74038-0233 | Oil Operator | Jan 2025 |
| 3945 | Meadowbrook Oil Corporation Of Ok Inc | Del City, OK 73115-3608 | Oil & Gas Operator | Feb 2025 |
| 3946 | Meadowlark Operator Co | Bartlesville, OK 74005 | Oil & Gas Operator | Jan 2025 |
| 3947 | Meadows, Kelly J | | Oil & Gas Operator | Mar 2015 |
| 3948 | Meason Petroleum LLC | Tulsa, OK 74119-3026 | Oil & Gas Operator | Dec 2016 |
| 3949 | Mecom Energy Corporation | Houston, TX 77030 | Oil & Gas Operator | Jan 1999 |
| 3950 | Medallion Energy Inc | Norman, OK 73072-7436 | Oil & Gas Operator | Aug 2004 |
| 3951 | Medallion Petroleum, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2015 |
| 3952 | Medders Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 3953 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 3954 | Medina-Pierce Oil & Gas Co | | Oil & Gas Operator | Feb 2012 |
| 3955 | Meek Joe E | | Oil Operator | Jul 2010 |
| 3956 | Mega Natural Gas Co | Tulsa, OK 74133 | Oil & Gas Operator | Jul 1996 |
| 3957 | Mega Resources Inc | Dallas, TX 75225-0186 | Oil & Gas Operator | Jan 2001 |
| 3958 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 3959 | Mel Cox Transports Inc | Comanche, OK 73529-7640 | Oil & Gas Operator | Jul 2022 |
| 3960 | Mel-Ray Oil Company | Nowata, OK 74048-0149 | Oil & Gas Operator | Mar 2004 |
| 3961 | Melson Oil & Gas Inc | Broken Arrow, OK 74014 | Oil & Gas Operator | Feb 2025 |
| 3962 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |
| 3963 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 3964 | Mep Operating LLC | Houston, TX 77056-2733 | Oil & Gas Operator | Jan 2025 |
| 3965 | Mer Resources Inc | Edmond, OK 73013-7662 | Oil & Gas Operator | Mar 2015 |
| 3966 | Mer-Bar Exploration Co Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Oct 1992 |
| 3967 | Mercer Oil & Gas Co. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 3968 | Mercer Pet Management Inc | Edmond, OK 73013-6677 | Oil & Gas Operator | Jan 2011 |
| 3969 | Merelco Inc | Seminole, OK 74868 | Oil Operator | Jun 2014 |
| 3970 | Merex Resources, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Sep 2019 |
| 3971 | Merica Oil Operating Company | Frisco, TX 75034 | Oil & Gas Operator | Sep 2024 |
| 3972 | Meridian Exploration Inc | Oklahoma City, OK 73128 | Oil & Gas Operator | Aug 2013 |
| 3973 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 3974 | Meridian Oil Production Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 2024 |
| 3975 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Apr 2025 |
| 3976 | Mermac Operating Company Inc | Norman, OK 73072 | Oil & Gas Operator | Mar 2015 |
| 3977 | Meroda Resources LLC | Mustang, OK 73064-9408 | Oil & Gas Operator | Apr 2000 |
| 3978 | Merrick Ward S Inc | Ardmore, OK 73402 | Oil & Gas Operator | Feb 2001 |
| 3979 | Mervine Oil Company Inc | Blackwell, OK 74631-0514 | Oil Operator | Jan 2013 |
| 3980 | Mesa Exploration Company Inc | Shawnee, OK 74801 | Oil & Gas Operator | Jan 2025 |
| 3981 | Mesa Operating LP | Irving, TX 75039-3746 | Oil & Gas Operator | Oct 2010 |
| 3982 | Metro Energy Group, Inc. | Bossier City, LA 71112 | Oil & Gas Operator | May 2013 |
| 3983 | Metro Energy LTD | Scottsdale, AZ 85254 | Oil Operator | Aug 2000 |
| 3984 | Metropolitan Resources Corp | Tulsa, OK 74169-1734 | Oil & Gas Operator | Mar 2015 |
| 3985 | Metzner, Norma J. Estate | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 1998 |
| 3986 | Mewbourne Marketing Inc | Tyler, TX 75711 | Oil & Gas Operator | Mar 2013 |
| 3987 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | Apr 2025 |
| 3988 | Meyer Oil Co., Inc. | Skellytown, TX 79080 | Oil & Gas Operator | Jan 2025 |
| 3989 | Meyerhoff & Cox Inc | Tulsa, OK 74135-7830 | Oil Operator | Aug 1993 |
| 3990 | MFP Petroleum LP | Oklahoma City, OK 73142-3017 | Gas Operator | Jan 2025 |
| 3991 | Mge Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jan 2025 |
| 3992 | MGF Oil Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1998 |
| 3993 | Michael Goodnight Operating LLC | St Louis, OK 74866 | Oil & Gas Operator | Jan 2025 |
| 3994 | Michaels, Bobby W | | Oil Operator | Nov 1998 |
| 3995 | Michigan Oil Co. | FT Worth, TX 76117 | Oil & Gas Operator | Feb 1998 |
| 3996 | Mickalson Operating Company | Cleveland, OK 74020 | Oil & Gas Operator | Feb 2025 |
| 3997 | Mickalson Petroleum Company | | Oil & Gas Operator | Mar 1993 |
| 3998 | Mid Center Oil Company | | Oil & Gas Operator | Mar 2014 |
| 3999 | Mid-Con Central Expl Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2014 |
| 4000 | Mid-Con Energy Operating, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | May 2020 |