| 1001 | McCutchin Alma Estate | Dallas, TX 75380 | Oil & Gas Operator | May 2013 |
| 1002 | McCutchin Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 1003 | McCutchin, Gene | Dallas, TX 75380 | Oil & Gas Operator | Aug 2003 |
| 1004 | McCutchin, Jerry | Dallas, TX 75380 | Oil & Gas Operator | Mar 2008 |
| 1005 | MCD, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Aug 2003 |
| 1006 | McDaniel Company, Inc., The | Dallas, TX 75230 | Oil & Gas Operator | Feb 2026 |
| 1007 | McDaniel Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Feb 2026 |
| 1008 | McDaniel Petroleum Company, Inc. | | Oil Operator | Jun 2020 |
| 1009 | McDaniel, Willard | Iraan, TX 79744 | Oil & Gas Operator | Nov 2004 |
| 1010 | McDaniel, Willard Jr. Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Mar 2005 |
| 1011 | McDay Energy Corp. | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 1012 | McDe Energy Company Inc | Enid, OK 73706 | Oil & Gas Operator | May 2009 |
| 1013 | McDonald & Johnson Resources,LLC | Cypress, TX 77429 | Oil & Gas Operator | Dec 2010 |
| 1014 | McDonald & Pomeroy Operating Co. | Pasadena, TX 77506 | Oil & Gas Operator | Aug 2003 |
| 1015 | McDonald Dale E | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 2024 |
| 1016 | McDonald Energy, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Feb 2026 |
| 1017 | McDonald Marketing & Operg. Co | | Gas Operator | May 1991 |
| 1018 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 1019 | McDonald Production, LLC | Lubbock, TX 79408 | Oil Operator | Feb 2026 |
| 1020 | McDonald Ranch Partnership | | Oil Operator | Nov 2025 |
| 1021 | McDonald Resources, LLC | Jefferson, TX 75657 | Oil & Gas Operator | Feb 2026 |
| 1022 | McDonald, Joe | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 1995 |
| 1023 | McDonald, R. A. Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Oct 2002 |
| 1024 | McDonald, Richard A. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Feb 2026 |
| 1025 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2026 |
| 1026 | McDowell And Cook, Inc. | | Oil Operator | Jan 1987 |
| 1027 | McDowell Ranch | Shamrock, TX 79079 | Gas Operator | Feb 2026 |
| 1028 | McElroy Drilling Co., Inc. | | Gas Operator | Dec 1987 |
| 1029 | McElroy John | Sapulpa, OK 74066-6119 | Oil & Gas Operator | Nov 2025 |
| 1030 | McElvain Energy Inc | Denver, CO 80265 | Oil & Gas Operator | Nov 2019 |
| 1031 | McElvain Oil & Gas Properties Inc | Denver, CO 80265-2080 | Oil & Gas Operator | Jul 2011 |
| 1032 | McEn 1996 Partnership | | Oil & Gas Operator | Sep 1999 |
| 1033 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 1034 | McEuen, Billy Oil Co. | Bowie, TX 76230 | Oil & Gas Operator | Dec 2016 |
| 1035 | McEver Oil Company Inc. | Austin, TX 78789 | Oil & Gas Operator | Mar 2008 |
| 1036 | MCF Co. | | Oil & Gas Operator | Dec 2011 |
| 1037 | McFadden Energy TX, LLC | Lakewood, NY 14750 | Oil Operator | Feb 2026 |
| 1038 | McFadden Oil Co. | | Oil Operator | Sep 2025 |
| 1039 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | Feb 2026 |
| 1040 | McFarland Energy, Inc. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2009 |
| 1041 | McFerran Operating LLC | Seminole, OK 74868-6202 | Oil & Gas Operator | Dec 2025 |
| 1042 | MCG Oil & Gas Operating, LLC | Archer City, TX 76351 | Oil & Gas Operator | Sep 2023 |
| 1043 | McGee Drilling Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 1044 | McGee, Tom Corporation | Booker, TX 79005 | Oil & Gas Operator | Nov 2025 |
| 1045 | McGehee, George T. Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Oct 1997 |
| 1046 | McGhee Exploration And Prod. Co. | Houston, TX 77019 | Oil & Gas Operator | Feb 2003 |
| 1047 | McGinley Jr, John R | | Gas Operator | Nov 1998 |
| 1048 | McGinley P A | Tulsa, OK 74101 | Oil & Gas Operator | Dec 1996 |
| 1049 | McGinness Energy Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Nov 2025 |
| 1050 | McGinness Oil Co | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 1051 | McGinness Oil Company Of Kansas, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Nov 2019 |
| 1052 | McGinnis Oil | | Oil & Gas Operator | Dec 2002 |
| 1053 | McGoldrick & Watson | | Oil & Gas Operator | Jul 1987 |
| 1054 | McGoldrick & Watson - Alagood | | Oil Operator | Oct 1995 |
| 1055 | McGoldrick & Watson DRLG., Co. | | Oil & Gas Operator | Jul 1987 |
| 1056 | McGoldrick & Watson, Et Al | | Oil Operator | Jul 1987 |
| 1057 | McGoldrick & Watson-Walker | | Oil Operator | Jul 1987 |
| 1058 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 1059 | McGonagill J W | MT Gilead, OH 43338 | Oil Operator | Dec 1984 |
| 1060 | McGonigal Dan L | Skiatook, OK 74070 | Oil & Gas Operator | Sep 2024 |
| 1061 | McGonigal Donald T | Tulsa, OK 74114-2145 | Oil & Gas Operator | Jul 2004 |
| 1062 | McGonigal Ted W | Norman, OK 73072 | Oil & Gas Operator | Sep 2025 |
| 1063 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 1064 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Feb 2026 |
| 1065 | McGowen Resources Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 1066 | McGown Drilling | | Oil Operator | Apr 1993 |
| 1067 | McGown Drilling, Inc. | Mound City, KS 66056 | Oil Operator | Sep 2025 |
| 1068 | McGrath, Rollie | Lake City, KS 67071 | Gas Operator | Aug 2025 |
| 1069 | McGriff Craig Exploration Inc | Oklahoma City, OK 73172-0364 | Oil & Gas Operator | Mar 2023 |
| 1070 | McGuffin, Joe Jr. | Christoval, TX 76935 | Oil & Gas Operator | Feb 2026 |
| 1071 | McGuffin, Joe S. Inc. | Mathis, TX 78368 | Gas Operator | Feb 2026 |
| 1072 | McGuire Brothers | Phoenix, AZ 85045 | Oil & Gas Operator | Feb 2026 |
| 1073 | McGuire John C | Gillette, WY 82717 | Oil & Gas Operator | Oct 2005 |
| 1074 | McGuire Tom Oil Company | Depew, OK 74028 | Oil Operator | Apr 2011 |
| 1075 | McIlhenny-Powell Operating Co | | Gas Operator | Aug 1983 |
| 1076 | McIlvain Oil LLC | Madison, KS 66860 | Oil Operator | Dec 2017 |
| 1077 | McIntosh Oil & Gas, Inc. | Coalton, WV 26257 | Oil & Gas Operator | Dec 2021 |
| 1078 | McIntyre M L | Oklahoma City, OK 73154-0523 | Oil & Gas Operator | Jul 1996 |
| 1079 | McIntyre Oil Company | | Oil & Gas Operator | Jan 1992 |
| 1080 | McIver, Inc | San Angelo, TX 76903 | Oil & Gas Operator | Feb 2026 |
| 1081 | McIver, Terry L. | Santa Anna, TX 76878 | Oil & Gas Operator | Aug 2003 |
| 1082 | McKay Oil | Portales, NM 88130 | Oil & Gas Operator | Apr 1996 |
| 1083 | McKay Oil & Gas LLC | Albuquerque, NM 87191 | Gas Operator | Mar 2020 |
| 1084 | McKay Oil Company | Perry, OK 73077 | Oil Operator | Nov 2008 |
| 1085 | McKay Oil Corp | Roswell, NM 88202 | Oil & Gas Operator | Aug 2017 |
| 1086 | McKay Operating LLC | Lubbock, TX 79416 | Oil & Gas Operator | Oct 2023 |
| 1087 | McKean Bros. | | Oil & Gas Operator | Dec 1997 |
| 1088 | McKee Don Drill Co Inc | Newark, OH 43058 | Oil & Gas Operator | Dec 2012 |
| 1089 | McKee Energy Comapny Inc | | Oil & Gas Operator | Apr 2011 |
| 1090 | McKee, Kenneth W. Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 1091 | McKeever, Tyra, Swenson Venture | Stamford, TX 79553 | Oil & Gas Operator | Apr 1996 |
| 1092 | McKellpee Energy Corp. | Olean, NY 14760 | Oil & Gas Operator | Dec 2024 |
| 1093 | McKelvy A D Oil | | Gas Operator | Feb 1995 |
| 1094 | McKenna Oil Co | Kane, PA 16735-9711 | Oil & Gas Operator | Dec 2004 |
| 1095 | McKenney & Chambers Oil Company | Westbrook, TX 79565 | Oil & Gas Operator | Oct 2003 |
| 1096 | McKenzie & Assoc. | | Gas Operator | Dec 1990 |
| 1097 | McKenzie Management Inc. | | Oil & Gas Operator | Aug 1989 |
| 1098 | McKenzie Methane | Houston, TX BAD ADDR | Gas Operator | Apr 1994 |
| 1099 | McKenzie Operating Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 1100 | McKenzie Petroleum Company | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |