| 18601 | McClain Oil Co | Granville, OH 43023 | Oil & Gas Operator | Dec 1988 |
| 18602 | McCleese Enterprises LLC | Richardson, TX 75082-4839 | Gas Operator | Dec 2017 |
| 18603 | McClellan Oil Corporation | Roswell, NM 882020730 | Oil & Gas Operator | May 2015 |
| 18604 | McClelland Creek Properties,Inc. | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 18605 | McClelland Oil - | | Oil Operator | Dec 2009 |
| 18606 | McClelland, C.R. Operations, Inc. | Madison, KS 66860 | Oil Operator | Aug 1998 |
| 18607 | McClintock V C | Casper, WY 82601 | Oil & Gas Operator | May 2024 |
| 18608 | McClintock, Robert T | | Oil & Gas Operator | Jan 2025 |
| 18609 | McClinton & 4-M Invest Inc | | Oil & Gas Operator | Aug 1992 |
| 18610 | McClinton & Mosing | | Oil & Gas Operator | Oct 1977 |
| 18611 | McClure Brothers | Denton, TX 76210 | Oil & Gas Operator | May 2025 |
| 18612 | McClure Enterprises | Recluse, WY 82725 | Oil & Gas Operator | Jan 2025 |
| 18613 | McClure M C Oil | | Oil Operator | Jul 1984 |
| 18614 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 18615 | McClure, J.D. Trust | Denton, TX 76209 | Oil & Gas Operator | May 2025 |
| 18616 | McCluskey J Sterling | New York, NY 10128-1008 | Gas Operator | Dec 1989 |
| 18617 | McCluskey Willia | | Oil & Gas Operator | Dec 1990 |
| 18618 | McClymond, B. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2020 |
| 18619 | McClymond, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2001 |
| 18620 | McClymond, LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2009 |
| 18621 | McColl, Francis E. | Le Roy, NY 14482 | Gas Operator | Dec 2023 |
| 18622 | McComb Oil Inc | Stoneboro, PA 16153-3017 | Oil & Gas Operator | Dec 2024 |
| 18623 | McCombs Energy LLC | Houston, TX 77056 | Oil & Gas Operator | Jan 2006 |
| 18624 | McCombs Energy, LTD. | Houston, TX 77056 | Oil & Gas Operator | Aug 2017 |
| 18625 | McCommons Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 18626 | McConathy & Associates | | Oil & Gas Operator | Dec 1983 |
| 18627 | McConathy Production Co.,Inc. | | Oil & Gas Operator | Jun 1990 |
| 18628 | McConnell And Scully Inc | | Oil & Gas Operator | Apr 2025 |
| 18629 | McConnell Oil Properties | | Oil Operator | Jan 2025 |
| 18630 | McCool John E | Youngsville, PA 16371 | Oil & Gas Operator | Mar 2025 |
| 18631 | McCord Al Inc | Norman, OK 73072-6720 | Oil & Gas Operator | Feb 2011 |
| 18632 | McCord Exploration Co. | | Oil & Gas Operator | Dec 1990 |
| 18633 | McCord J K | Duncan, OK 73534-0032 | Oil Operator | Mar 2009 |
| 18634 | McCord Oil Co. And T. Walker | | Oil & Gas Operator | Dec 1985 |
| 18635 | McCord-Dale Exploration | | Oil & Gas Operator | May 1986 |
| 18636 | McCord-Goodrich Oil Company | | Oil & Gas Operator | Oct 1991 |
| 18637 | McCorgary Martin E | Arkansas City, KS 67005-5452 | Oil & Gas Operator | Feb 2025 |
| 18638 | McCorgary Operations | | Oil & Gas Operator | Jan 2025 |
| 18639 | McCorkle, Frank R. & Kathleen A. | Sedan, KS 67361 | Oil Operator | Oct 2009 |
| 18640 | McCormack, Lowell Ray | Gainesville, TX 76240 | Oil & Gas Operator | Dec 1993 |
| 18641 | McCormack, Paul H. | Gainesville, TX 76241 | Oil & Gas Operator | Sep 2003 |
| 18642 | McCormick Operating Company | | Oil & Gas Operator | Mar 1984 |
| 18643 | McCormick Operating PRTNSHP | | Oil & Gas Operator | Sep 1985 |
| 18644 | McCormick Operating, L.L.C. | Olney, TX 76374 | Oil Operator | Sep 2015 |
| 18645 | McCormick Production Co, Inc. | Oil City, LA 71061 | Oil & Gas Operator | May 2025 |
| 18646 | McCormick, Mark | Java Center, NY 14082 | Gas Operator | Dec 2023 |
| 18647 | McCormick, Ronald R. | Java Center, NY 14082 | Gas Operator | Dec 2023 |
| 18648 | McCormick, Terrance & Anne | Andover, NY 14806 | Oil & Gas Operator | Dec 2023 |
| 18649 | McCormick-Bintliff | | Oil & Gas Operator | Feb 1984 |
| 18650 | McCormick-Bintliff-Pettit | | Oil & Gas Operator | Feb 1984 |
| 18651 | McCormick-Ciroco, Inc. | | Oil & Gas Operator | Jan 1984 |
| 18652 | McCormick-Terra-Bintliff | | Oil & Gas Operator | Dec 1979 |
| 18653 | McCormick-WHB | | Gas Operator | Jan 1984 |
| 18654 | McCort Brian L | Malaga, OH 43757 | Oil & Gas Operator | Dec 2024 |
| 18655 | McCown Engineering | Wichita Falls, TX 76310 | Oil & Gas Operator | May 2025 |
| 18656 | McCoy Alex W & Associates | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2009 |
| 18657 | McCoy Natural Gas Co | Oil City, PA 16301-3003 | Gas Operator | Dec 1995 |
| 18658 | McCoy Petroleum | | Oil & Gas Operator | Aug 1996 |
| 18659 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Apr 2025 |
| 18660 | McCoy Production | El Dorado, KS 67042 | Oil Operator | Dec 2019 |
| 18661 | McCoy, Jon | Erie, KS 66733 | Oil Operator | Jan 2025 |
| 18662 | McCracken Energy Services, LLC | Bradford, PA 16701 | Oil & Gas Operator | Dec 2023 |
| 18663 | McCracken Oil & Gas, LLC | Bradford, PA 16701 | Oil & Gas Operator | Dec 2023 |
| 18664 | McCracken, Carl A. III | | Oil & Gas Operator | Dec 2012 |
| 18665 | McCracken, Cory | Bradford, PA 16701 | Oil & Gas Operator | Dec 2023 |
| 18666 | McCracken, H. L. Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 18667 | McCrary & Franklin, Inc. | Post, TX 79356 | Oil & Gas Operator | May 2012 |
| 18668 | McCrary Oil Company, Inc. | College Sta, TX 77840 | Oil & Gas Operator | Sep 2019 |
| 18669 | McCraw Family Limited Partnership (The) | Konawa, OK 74849-5616 | Oil & Gas Operator | Jul 2024 |
| 18670 | McCray, Gordon M. | Clymer, NY 14724 | Gas Operator | Dec 2023 |
| 18671 | McCrea Exploration Company, Inc. | Carrollton, TX 75007 | Oil & Gas Operator | Nov 1995 |
| 18672 | McCullis Resources Co., Inc. | Littleton, CO 80161 | Oil & Gas Operator | Mar 2025 |
| 18673 | McCulliss Resource Company Inc | Denver, CO 80202 | Oil & Gas Operator | Jun 1999 |
| 18674 | McCulliss Resources Co Inc | Littleton, CO 80161-3248 | Oil & Gas Operator | Jun 2009 |
| 18675 | McCulloch Geothermal Corporation | | Oil & Gas Operator | Jun 1982 |
| 18676 | McCulloch Oil Corp Of Ca | | Oil & Gas Operator | May 1980 |
| 18677 | McCulloch Oil Corp.-Ids | | Oil & Gas Operator | Dec 1981 |
| 18678 | McCullough G W | Norman, OK 73072 | Oil & Gas Operator | Aug 2000 |
| 18679 | McCullough, Richard F. | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 18680 | McCurdy Energy LLC | Midland, TX 79705 | Oil Operator | May 2025 |
| 18681 | McCurdy Oil Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2025 |
| 18682 | McCutchin Alma Estate | Dallas, TX 75380 | Oil & Gas Operator | May 2013 |
| 18683 | McCutchin Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | May 2025 |
| 18684 | McCutchin, Gene | Dallas, TX 75380 | Oil & Gas Operator | Aug 2003 |
| 18685 | McCutchin, Jerry | Dallas, TX 75380 | Oil & Gas Operator | Mar 2008 |
| 18686 | McDaniel Company, Inc., The | Dallas, TX 75230 | Oil & Gas Operator | May 2025 |
| 18687 | McDaniel Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | May 2025 |
| 18688 | McDaniel Petroleum Company, Inc. | | Oil Operator | Jun 2020 |
| 18689 | McDaniel, Willard | Iraan, TX 79744 | Oil & Gas Operator | Nov 2004 |
| 18690 | McDaniel, Willard Jr. Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Mar 2005 |
| 18691 | McDay Energy Corp. | Dallas, TX 75206 | Oil & Gas Operator | May 2025 |
| 18692 | McDe Energy Company Inc | Enid, OK 73706 | Oil & Gas Operator | May 2009 |
| 18693 | McDonald & Johnson Resources,LLC | Cypress, TX 77429 | Oil & Gas Operator | Dec 2010 |
| 18694 | McDonald & Pomeroy Operating Co. | Pasadena, TX 77506 | Oil & Gas Operator | Aug 2003 |
| 18695 | McDonald Dale E | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 2024 |
| 18696 | McDonald Energy, Inc. | Granbury, TX 76049 | Oil & Gas Operator | May 2025 |
| 18697 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 18698 | McDonald Production, LLC | Lubbock, TX 79408 | Oil Operator | May 2025 |
| 18699 | McDonald Ranch Partnership | | Oil Operator | Mar 2025 |
| 18700 | McDonald Resources, LLC | Jefferson, TX 75657 | Oil & Gas Operator | May 2025 |