| 18501 | McCorgary Martin E | Arkansas City, KS 67005-5452 | Oil & Gas Operator | Feb 2025 |
| 18502 | McCorgary Operations | | Oil & Gas Operator | Jan 2025 |
| 18503 | McCorkle, Frank R. & Kathleen A. | Sedan, KS 67361 | Oil Operator | Oct 2009 |
| 18504 | McCormack, Lowell Ray | Gainesville, TX 76240 | Oil & Gas Operator | Dec 1993 |
| 18505 | McCormack, Paul H. | Gainesville, TX 76241 | Oil & Gas Operator | Sep 2003 |
| 18506 | McCormick Operating Company | | Oil & Gas Operator | Mar 1984 |
| 18507 | McCormick Operating PRTNSHP | | Oil & Gas Operator | Sep 1985 |
| 18508 | McCormick Operating, L.L.C. | Olney, TX 76374 | Oil Operator | Sep 2015 |
| 18509 | McCormick Production Co, Inc. | Oil City, LA 71061 | Oil & Gas Operator | Jul 2025 |
| 18510 | McCormick, Mark | Java Center, NY 14082 | Gas Operator | Dec 2024 |
| 18511 | McCormick, Ronald R. | Java Center, NY 14082 | Gas Operator | Dec 2024 |
| 18512 | McCormick, Terrance & Anne | Andover, NY 14806 | Oil & Gas Operator | Dec 2024 |
| 18513 | McCormick-Bintliff | | Oil & Gas Operator | Feb 1984 |
| 18514 | McCormick-Bintliff-Pettit | | Oil & Gas Operator | Feb 1984 |
| 18515 | McCormick-Ciroco, Inc. | | Oil & Gas Operator | Jan 1984 |
| 18516 | McCormick-Terra-Bintliff | | Oil & Gas Operator | Dec 1979 |
| 18517 | McCormick-WHB | | Gas Operator | Jan 1984 |
| 18518 | McCort Brian L | Malaga, OH 43757 | Oil & Gas Operator | Dec 2024 |
| 18519 | McCown Engineering | Wichita Falls, TX 76310 | Oil & Gas Operator | Jul 2025 |
| 18520 | McCoy Alex W & Associates | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2009 |
| 18521 | McCoy Natural Gas Co | Oil City, PA 16301-3003 | Gas Operator | Dec 1995 |
| 18522 | McCoy Petroleum | | Oil & Gas Operator | Aug 1996 |
| 18523 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | Jun 2025 |
| 18524 | McCoy Production | El Dorado, KS 67042 | Oil Operator | Dec 2019 |
| 18525 | McCoy, Jon | Erie, KS 66733 | Oil Operator | Jan 2025 |
| 18526 | McCracken Energy Services, LLC | Bradford, PA 16701 | Oil & Gas Operator | Dec 2024 |
| 18527 | McCracken Oil & Gas, LLC | Bradford, PA 16701 | Oil & Gas Operator | Dec 2024 |
| 18528 | McCracken, Carl A. III | | Oil & Gas Operator | Dec 2012 |
| 18529 | McCracken, Cory | Bradford, PA 16701 | Oil & Gas Operator | Dec 2024 |
| 18530 | McCracken, H. L. Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2025 |
| 18531 | McCrary & Franklin, Inc. | Post, TX 79356 | Oil & Gas Operator | May 2012 |
| 18532 | McCrary Oil Company, Inc. | College Sta, TX 77840 | Oil & Gas Operator | Sep 2019 |
| 18533 | McCraw Family Limited Partnership (The) | Konawa, OK 74849-5616 | Oil & Gas Operator | Jul 2024 |
| 18534 | McCrea Exploration Company, Inc. | Carrollton, TX 75007 | Oil & Gas Operator | Nov 1995 |
| 18535 | McCullis Resources Co., Inc. | Littleton, CO 80161 | Oil & Gas Operator | Apr 2025 |
| 18536 | McCulliss Resource Company Inc | Denver, CO 80202 | Oil & Gas Operator | Jun 1999 |
| 18537 | McCulliss Resources Co Inc | Littleton, CO 80161-3248 | Oil & Gas Operator | Jun 2009 |
| 18538 | McCulloch Geothermal Corporation | | Oil & Gas Operator | Jun 1982 |
| 18539 | McCulloch Oil Corp Of Ca | | Oil & Gas Operator | May 1980 |
| 18540 | McCulloch Oil Corp.-Ids | | Oil & Gas Operator | Dec 1981 |
| 18541 | McCullough G W | Norman, OK 73072 | Oil & Gas Operator | Aug 2000 |
| 18542 | McCullough, Richard F. | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 18543 | McCurdy Energy LLC | Midland, TX 79705 | Oil Operator | Jul 2025 |
| 18544 | McCurdy Oil Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2025 |
| 18545 | McCutchin Alma Estate | Dallas, TX 75380 | Oil & Gas Operator | May 2013 |
| 18546 | McCutchin Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Jul 2025 |
| 18547 | McCutchin, Gene | Dallas, TX 75380 | Oil & Gas Operator | Aug 2003 |
| 18548 | McCutchin, Jerry | Dallas, TX 75380 | Oil & Gas Operator | Mar 2008 |
| 18549 | McDaniel Company, Inc., The | Dallas, TX 75230 | Oil & Gas Operator | Jul 2025 |
| 18550 | McDaniel Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Jul 2025 |
| 18551 | McDaniel Petroleum Company, Inc. | | Oil Operator | Jun 2020 |
| 18552 | McDaniel, Willard | Iraan, TX 79744 | Oil & Gas Operator | Nov 2004 |
| 18553 | McDaniel, Willard Jr. Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Mar 2005 |
| 18554 | McDay Energy Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jul 2025 |
| 18555 | McDe Energy Company Inc | Enid, OK 73706 | Oil & Gas Operator | May 2009 |
| 18556 | McDonald & Johnson Resources,LLC | Cypress, TX 77429 | Oil & Gas Operator | Dec 2010 |
| 18557 | McDonald & Pomeroy Operating Co. | Pasadena, TX 77506 | Oil & Gas Operator | Aug 2003 |
| 18558 | McDonald Dale E | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 2024 |
| 18559 | McDonald Energy, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Jul 2025 |
| 18560 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 18561 | McDonald Production, LLC | Lubbock, TX 79408 | Oil Operator | Jul 2025 |
| 18562 | McDonald Ranch Partnership | | Oil Operator | Apr 2025 |
| 18563 | McDonald Resources, LLC | Jefferson, TX 75657 | Oil & Gas Operator | Jul 2025 |
| 18564 | McDonald, Joe | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 1995 |
| 18565 | McDonald, R. A. Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Oct 2002 |
| 18566 | McDonald, Richard A. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Jul 2025 |
| 18567 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 18568 | McDowell And Cook, Inc. | | Oil Operator | Jan 1987 |
| 18569 | McDowell Ranch | Shamrock, TX 79079 | Gas Operator | Jul 2025 |
| 18570 | McElroy Drilling Co., Inc. | | Gas Operator | Dec 1987 |
| 18571 | McElroy John | Sapulpa, OK 74066-6119 | Oil & Gas Operator | Apr 2025 |
| 18572 | McElvain Energy Inc | Denver, CO 80265 | Oil & Gas Operator | Nov 2019 |
| 18573 | McElvain Oil & Gas Properties Inc | Denver, CO 80265-2080 | Oil & Gas Operator | Jul 2011 |
| 18574 | McEn 1996 Partnership | | Oil & Gas Operator | Sep 1999 |
| 18575 | McEna Inc | Tulsa, OK 74135 | Oil & Gas Operator | Jul 2005 |
| 18576 | McEuen, Billy Oil Co. | Bowie, TX 76230 | Oil & Gas Operator | Dec 2016 |
| 18577 | McEver Oil Company Inc. | Austin, TX 78789 | Oil & Gas Operator | Mar 2008 |
| 18578 | MCF Co. | | Oil & Gas Operator | Dec 2011 |
| 18579 | McFadden Energy TX, LLC | Lakewood, NY 14750 | Oil Operator | Jul 2025 |
| 18580 | McFadden Oil Co. | | Oil Operator | Mar 2025 |
| 18581 | McFarland & Scobey, Inc. | El Paso, TX 79947 | Oil & Gas Operator | Jul 2025 |
| 18582 | McFarland Energy, Inc. | New Orleans, LA 70160 | Oil & Gas Operator | Dec 2009 |
| 18583 | McFerran Operating LLC | Seminole, OK 74868-6202 | Oil & Gas Operator | Apr 2025 |
| 18584 | MCG Oil & Gas Operating, LLC | Archer City, TX 76351 | Oil & Gas Operator | Sep 2023 |
| 18585 | McGee Drilling Corporation | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 18586 | McGee, Tom Corporation | Booker, TX 79005 | Oil & Gas Operator | Apr 2025 |
| 18587 | McGehee, George T. Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Oct 1997 |
| 18588 | McGhee Exploration And Prod. Co. | Houston, TX 77019 | Oil & Gas Operator | Feb 2003 |
| 18589 | McGinley Jr, John R | | Gas Operator | Nov 1998 |
| 18590 | McGinley P A | Tulsa, OK 74101 | Oil & Gas Operator | Dec 1996 |
| 18591 | McGinness Energy Company Inc | Wichita, KS 67206 | Oil & Gas Operator | Apr 2025 |
| 18592 | McGinness Oil Co | Wichita, KS 67202 | Oil & Gas Operator | Dec 2019 |
| 18593 | McGinness Oil Company Of Kansas, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Nov 2019 |
| 18594 | McGinnis Oil | | Oil & Gas Operator | Dec 2002 |
| 18595 | McGoldrick & Watson | | Oil & Gas Operator | Jul 1987 |
| 18596 | McGoldrick & Watson - Alagood | | Oil Operator | Oct 1995 |
| 18597 | McGoldrick & Watson DRLG., Co. | | Oil & Gas Operator | Jul 1987 |
| 18598 | McGoldrick & Watson, Et Al | | Oil Operator | Jul 1987 |
| 18599 | McGoldrick & Watson-Walker | | Oil Operator | Jul 1987 |
| 18600 | McGoldrick Oil Company | Shreveport, LA 71129 | Oil & Gas Operator | Jul 2020 |