| 6701 | Mayes Operating Co. | Stephenville, TX 76401 | Oil & Gas Operator | Oct 2019 |
| 6702 | Mayfield Energy, LLC | Austin, TX 78732 | Oil & Gas Operator | Apr 2024 |
| 6703 | Mayfield Engineering Service | Tulsa, OK 74104 | Oil & Gas Operator | Apr 2024 |
| 6704 | Mayjac I, LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 6705 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 6706 | Mayne & Mertz, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2013 |
| 6707 | Mayo Oil Co. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2019 |
| 6708 | Mayo, Danny | Whitesboro, TX 76273 | Oil & Gas Operator | Apr 2024 |
| 6709 | Mayo, Eddie | Fredericksbrg, TX 78624 | Oil & Gas Operator | Apr 2024 |
| 6710 | Mayo, Keith | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2009 |
| 6711 | Mayo, Paul R. | Quinlan, TX 75474 | Oil & Gas Operator | May 1999 |
| 6712 | Mazco Energy LLC | San Antonio, TX 78266 | Oil & Gas Operator | Apr 2024 |
| 6713 | MB Energy, LLC | San Antonio, TX 78233 | Oil & Gas Operator | Apr 2024 |
| 6714 | MB Exploration, LLC | Dallas, TX 75380 | Oil & Gas Operator | Jul 2008 |
| 6715 | MB Operating | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2008 |
| 6716 | MBC Operating Co., Inc. | Garland, TX 75042 | Oil & Gas Operator | Aug 1993 |
| 6717 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2024 |
| 6718 | MBX Operating LLC | Houston, TX 77007 | Oil & Gas Operator | Apr 2024 |
| 6719 | MC Glover, LLC | Albany, TX 76430 | Oil Operator | Apr 2024 |
| 6720 | MC Panhandle, Inc. | Tulsa, OK 74102 | Gas Operator | Jul 1998 |
| 6721 | MC1 Consulting, Inc. | San Antonio, TX 78209 | Oil Operator | Apr 2024 |
| 6722 | McA Petroleum Corporation | Flatonia, TX 78941 | Oil & Gas Operator | Apr 2024 |
| 6723 | McAlester Fuel Co | Houston, TX 77042 | Oil & Gas Operator | Jan 2010 |
| 6724 | McAnear Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Dec 2002 |
| 6725 | McBay Company | Grapeland, TX 75844 | Oil & Gas Operator | Feb 2002 |
| 6726 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 6727 | McBee Operating Company, L.L.C. | Dallas, TX 75209 | Oil & Gas Operator | Apr 2024 |
| 6728 | McBee, Jim Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2012 |
| 6729 | McBrayer Oil Corporation | Rockport, TX 78381 | Oil & Gas Operator | Nov 1994 |
| 6730 | McBride Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2024 |
| 6731 | McBride, Jerrel L Enterprise Inc | Kilgore, TX 75663 | Oil & Gas Operator | Jun 1999 |
| 6732 | McCabe Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2009 |
| 6733 | McCamey Well Production, Inc. | MC Camey, TX 79752 | Oil Operator | Apr 2024 |
| 6734 | McCammon Oil & Gas, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Apr 2024 |
| 6735 | McCann Corporation | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 6736 | McCarter, A. Nelson | Houston, TX 77063 | Oil & Gas Operator | Aug 2003 |
| 6737 | McCarter, W. B. Jr. | Houston, TX 77063 | Oil & Gas Operator | Feb 2002 |
| 6738 | McCauley Production | Graham, TX 76450 | Oil Operator | Apr 2024 |
| 6739 | McCauley, F. R. | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 6740 | McClelland Creek Properties,Inc. | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 6741 | McClure Brothers | Denton, TX 76210 | Oil & Gas Operator | Apr 2024 |
| 6742 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 6743 | McClure, J.D. Trust | Denton, TX 76209 | Oil & Gas Operator | Apr 2024 |
| 6744 | McClymond, B. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2020 |
| 6745 | McClymond, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2001 |
| 6746 | McClymond, LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2009 |
| 6747 | McCombs Energy LLC | Houston, TX 77056 | Oil & Gas Operator | Jan 2006 |
| 6748 | McCombs Energy, LTD. | Houston, TX 77056 | Oil & Gas Operator | Aug 2017 |
| 6749 | McCommons Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 6750 | McCool John E | Youngsville, PA 16371 | Oil & Gas Operator | Feb 2024 |
| 6751 | McCord Production, LTD. | Houston, TX 77002 | Gas Operator | Feb 1997 |
| 6752 | McCormack, Lowell Ray | Gainesville, TX 76240 | Oil & Gas Operator | Dec 1993 |
| 6753 | McCormack, Paul H. | Gainesville, TX 76241 | Oil & Gas Operator | Sep 2003 |
| 6754 | McCormick Operating, L.L.C. | Olney, TX 76374 | Oil Operator | Sep 2015 |
| 6755 | McCormick Production Co, Inc. | Oil City, LA 71061 | Oil & Gas Operator | Apr 2024 |
| 6756 | McCown Engineering | Wichita Falls, TX 76310 | Oil & Gas Operator | Apr 2024 |
| 6757 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Mar 2024 |
| 6758 | McCracken, H. L. Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Apr 2024 |
| 6759 | McCrary & Franklin, Inc. | Post, TX 79356 | Oil & Gas Operator | May 2012 |
| 6760 | McCrary Oil Company, Inc. | College Sta, TX 77840 | Oil & Gas Operator | Sep 2019 |
| 6761 | McCrea Exploration Company, Inc. | Carrollton, TX 75007 | Oil & Gas Operator | Nov 1995 |
| 6762 | McCullis Resources Co., Inc. | Littleton, CO 80161 | Oil & Gas Operator | Jan 2024 |
| 6763 | McCulliss Resources Co Inc | Littleton, CO 80161-3248 | Oil & Gas Operator | Jun 2009 |
| 6764 | McCurdy Energy LLC | Midland, TX 79705 | Oil Operator | Apr 2024 |
| 6765 | McCurdy Oil Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2024 |
| 6766 | McCutchin Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 6767 | McCutchin, Gene | Dallas, TX 75380 | Oil & Gas Operator | Aug 2003 |
| 6768 | McCutchin, Jerry | Dallas, TX 75380 | Oil & Gas Operator | Mar 2008 |
| 6769 | McDaniel Company, Inc., The | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 6770 | McDaniel Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Apr 2024 |
| 6771 | McDaniel, Willard | Iraan, TX 79744 | Oil & Gas Operator | Nov 2004 |
| 6772 | McDaniel, Willard Jr. Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Mar 2005 |
| 6773 | McDay Energy Corp. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 6774 | McDonald & Johnson Resources,LLC | Cypress, TX 77429 | Oil & Gas Operator | Dec 2010 |
| 6775 | McDonald & Pomeroy Operating Co. | Pasadena, TX 77506 | Oil & Gas Operator | Aug 2003 |
| 6776 | McDonald Energy, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Apr 2024 |
| 6777 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 6778 | McDonald Production, LLC | Lubbock, TX 79408 | Oil Operator | Apr 2024 |
| 6779 | McDonald Resources, LLC | Jefferson, TX 75657 | Oil & Gas Operator | Apr 2024 |
| 6780 | McDonald, Joe | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 1995 |
| 6781 | McDonald, R. A. Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Oct 2002 |
| 6782 | McDonald, Richard A. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Apr 2024 |
| 6783 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 6784 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 6785 | McEuen, Billy Oil Co. | Bowie, TX 76230 | Oil & Gas Operator | Dec 2016 |
| 6786 | McEver Oil Company Inc. | Austin, TX 78789 | Oil & Gas Operator | Mar 2008 |
| 6787 | McFadden Energy TX, LLC | Lakewood, NY 14750 | Oil Operator | Apr 2024 |
| 6788 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | Apr 2024 |
| 6789 | McFarland Energy, Inc. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2009 |
| 6790 | MCG Oil & Gas Operating, LLC | Archer City, TX 76351 | Oil & Gas Operator | Sep 2023 |
| 6791 | McGee Drilling Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 6792 | McGee, Tom Corporation | Booker, TX 79005 | Oil & Gas Operator | Jan 2024 |
| 6793 | McGehee, George T. Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Oct 1997 |
| 6794 | McGhee Exploration And Prod. Co. | Houston, TX 77019 | Oil & Gas Operator | Feb 2003 |
| 6795 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |
| 6796 | McGowan Working Partners | Jackson, MS 39296 | Oil & Gas Operator | Dec 2000 |
| 6797 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Apr 2024 |
| 6798 | McGowen Resources Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2003 |
| 6799 | McGuffin, Joe Jr. | Christoval, TX 76935 | Oil & Gas Operator | Apr 2024 |
| 6800 | McGuire Brothers | Phoenix, AZ 85045 | Oil & Gas Operator | Apr 2024 |