| 6901 | McCauley, F. R. | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 6902 | McClelland Creek Properties,Inc. | Pampa, TX 79066 | Oil & Gas Operator | Oct 2025 |
| 6903 | McClure Brothers | Denton, TX 76210 | Oil & Gas Operator | Oct 2025 |
| 6904 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 6905 | McClure, J.D. Trust | Denton, TX 76209 | Oil & Gas Operator | Oct 2025 |
| 6906 | McClymond, B. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2020 |
| 6907 | McClymond, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2001 |
| 6908 | McClymond, LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2009 |
| 6909 | McCombs Energy LLC | Houston, TX 77056 | Oil & Gas Operator | Jan 2006 |
| 6910 | McCombs Energy, LTD. | Houston, TX 77056 | Oil & Gas Operator | Aug 2017 |
| 6911 | McCommons Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 6912 | McCool John E | Youngsville, PA 16371 | Oil & Gas Operator | Jul 2025 |
| 6913 | McCormack, Lowell Ray | Gainesville, TX 76240 | Oil & Gas Operator | Dec 1993 |
| 6914 | McCormack, Paul H. | Gainesville, TX 76241 | Oil & Gas Operator | Sep 2003 |
| 6915 | McCormick Operating, L.L.C. | Olney, TX 76374 | Oil Operator | Sep 2015 |
| 6916 | McCormick Production Co, Inc. | Oil City, LA 71061 | Oil & Gas Operator | Oct 2025 |
| 6917 | McCown Engineering | Wichita Falls, TX 76310 | Oil & Gas Operator | Oct 2025 |
| 6918 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Aug 2025 |
| 6919 | McCracken, H. L. Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 6920 | McCrary & Franklin, Inc. | Post, TX 79356 | Oil & Gas Operator | May 2012 |
| 6921 | McCrary Oil Company, Inc. | College Sta, TX 77840 | Oil & Gas Operator | Sep 2019 |
| 6922 | McCrea Exploration Company, Inc. | Carrollton, TX 75007 | Oil & Gas Operator | Nov 1995 |
| 6923 | McCullis Resources Co., Inc. | Littleton, CO 80161 | Oil & Gas Operator | Jul 2025 |
| 6924 | McCulliss Resources Co Inc | Littleton, CO 80161-3248 | Oil & Gas Operator | Jun 2009 |
| 6925 | McCurdy Energy LLC | Midland, TX 79705 | Oil Operator | Oct 2025 |
| 6926 | McCurdy Oil Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2025 |
| 6927 | McCutchin Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 6928 | McCutchin, Gene | Dallas, TX 75380 | Oil & Gas Operator | Aug 2003 |
| 6929 | McCutchin, Jerry | Dallas, TX 75380 | Oil & Gas Operator | Mar 2008 |
| 6930 | McDaniel Company, Inc., The | Dallas, TX 75230 | Oil & Gas Operator | Oct 2025 |
| 6931 | McDaniel Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Oct 2025 |
| 6932 | McDaniel, Willard | Iraan, TX 79744 | Oil & Gas Operator | Nov 2004 |
| 6933 | McDaniel, Willard Jr. Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Mar 2005 |
| 6934 | McDay Energy Corp. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 6935 | McDonald & Johnson Resources,LLC | Cypress, TX 77429 | Oil & Gas Operator | Dec 2010 |
| 6936 | McDonald & Pomeroy Operating Co. | Pasadena, TX 77506 | Oil & Gas Operator | Aug 2003 |
| 6937 | McDonald Energy, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Oct 2025 |
| 6938 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 6939 | McDonald Production, LLC | Lubbock, TX 79408 | Oil Operator | Oct 2025 |
| 6940 | McDonald Resources, LLC | Jefferson, TX 75657 | Oil & Gas Operator | Oct 2025 |
| 6941 | McDonald, Joe | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 1995 |
| 6942 | McDonald, R. A. Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Oct 2002 |
| 6943 | McDonald, Richard A. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Oct 2025 |
| 6944 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 6945 | McDowell Ranch | Shamrock, TX 79079 | Gas Operator | Oct 2025 |
| 6946 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 6947 | McEuen, Billy Oil Co. | Bowie, TX 76230 | Oil & Gas Operator | Dec 2016 |
| 6948 | McEver Oil Company Inc. | Austin, TX 78789 | Oil & Gas Operator | Mar 2008 |
| 6949 | McFadden Energy TX, LLC | Lakewood, NY 14750 | Oil Operator | Oct 2025 |
| 6950 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | Oct 2025 |
| 6951 | McFarland Energy, Inc. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2009 |
| 6952 | MCG Oil & Gas Operating, LLC | Archer City, TX 76351 | Oil & Gas Operator | Sep 2023 |
| 6953 | McGee Drilling Corporation | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 6954 | McGee, Tom Corporation | Booker, TX 79005 | Oil & Gas Operator | Jun 2025 |
| 6955 | McGehee, George T. Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Oct 1997 |
| 6956 | McGhee Exploration And Prod. Co. | Houston, TX 77019 | Oil & Gas Operator | Feb 2003 |
| 6957 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 6958 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 6959 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Oct 2025 |
| 6960 | McGowen Resources Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 6961 | McGuffin, Joe Jr. | Christoval, TX 76935 | Oil & Gas Operator | Oct 2025 |
| 6962 | McGuffin, Joe S. Inc. | Mathis, TX 78368 | Gas Operator | Oct 2025 |
| 6963 | McGuire Brothers | Phoenix, AZ 85045 | Oil & Gas Operator | Oct 2025 |
| 6964 | McIver, Inc | San Angelo, TX 76903 | Oil & Gas Operator | Oct 2025 |
| 6965 | McIver, Terry L. | Santa Anna, TX 76878 | Oil & Gas Operator | Aug 2003 |
| 6966 | McKay Oil | Portales, NM 88130 | Oil & Gas Operator | Apr 1996 |
| 6967 | McKay Operating LLC | Lubbock, TX 79416 | Oil & Gas Operator | Oct 2023 |
| 6968 | McKee, Kenneth W. Oil Co. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 6969 | McKeever, Tyra, Swenson Venture | Stamford, TX 79553 | Oil & Gas Operator | Apr 1996 |
| 6970 | McKenney & Chambers Oil Company | Westbrook, TX 79565 | Oil & Gas Operator | Oct 2003 |
| 6971 | McKenzie Operating Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2011 |
| 6972 | McKenzie Production Company | Houston, TX 77063 | Oil & Gas Operator | May 1995 |
| 6973 | McKinney Operating Company | Canadian, TX 79014 | Gas Operator | May 2002 |
| 6974 | McKinney, M. H. | Midland, TX 79701 | Oil & Gas Operator | Apr 1995 |
| 6975 | McKnight, C. L. | McLeod, TX 75565 | Oil & Gas Operator | Oct 2025 |
| 6976 | McKnight, C. L. Oil Co. LLP | McLeod, TX 75565 | Oil & Gas Operator | Oct 2025 |
| 6977 | McKnight, J. C. | Jefferson, TX 75657 | Oil & Gas Operator | Nov 2019 |
| 6978 | McLain Exploration, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Mar 2008 |
| 6979 | McLelland Engineering & MGMT. | Houston, TX 77042 | Oil & Gas Operator | Mar 1999 |
| 6980 | McLemore, Laurence | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 2025 |
| 6981 | McLeod, George L. Inc. | Houston, TX 77079 | Oil & Gas Operator | Sep 2002 |
| 6982 | MCM Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2025 |
| 6983 | McMahon Operating Co., L.C. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2004 |
| 6984 | McMahon-Bullington Drilling Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 1996 |
| 6985 | McMahon-Bullington LP | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2009 |
| 6986 | McMinn Operating Company, Inc. | Hempstead, TX 77445 | Oil & Gas Operator | Oct 2025 |
| 6987 | McMoran Oil & Gas LLC | New Orleans, LA 70160 | Oil & Gas Operator | Oct 2021 |
| 6988 | McMullan Oil Company | San Antonio, TX 78212 | Oil & Gas Operator | Jun 2023 |
| 6989 | McMurrey, R. J., Production Comp | Tyler, TX 75711 | Oil & Gas Operator | Oct 2025 |
| 6990 | McNallen & Griffin | Keller, TX 76244 | Oil & Gas Operator | Oct 2025 |
| 6991 | McNallen Oil Co., Inc. | Keller, TX 76244 | Oil & Gas Operator | Oct 2025 |
| 6992 | McNic Oil & Gas Midcontinent,Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 1999 |
| 6993 | McOsker Bros., Inc. | San Antonio, TX 78264 | Oil & Gas Operator | Aug 2003 |
| 6994 | McQueen Ed & Company Inc | Lindsey, OK 73052 | Oil & Gas Operator | Apr 2014 |
| 6995 | MCR Operating Group | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |
| 6996 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
| 6997 | McRae Exploration & Prod., Inc. | Houston, TX 77064 | Oil & Gas Operator | Feb 2017 |
| 6998 | McRae, Nathan Rathburn | Hebbronville, TX 78361 | Oil & Gas Operator | Apr 1994 |
| 6999 | McShane, J. Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2004 |
| 7000 | MCZ, Inc. | Houston, TX 77026 | Oil & Gas Operator | Sep 1990 |