| 18201 | McClinton & 4-M Invest Inc | | Oil & Gas Operator | Aug 1992 |
| 18202 | McClinton & Mosing | | Oil & Gas Operator | Oct 1977 |
| 18203 | McClure Brothers | Denton, TX 76210 | Oil & Gas Operator | Jul 2026 |
| 18204 | McClure Enterprises | Recluse, WY 82725 | Oil & Gas Operator | Dec 2025 |
| 18205 | McClure M C Oil | | Oil Operator | Jul 1984 |
| 18206 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 18207 | McClure, J.D. Trust | Denton, TX 76209 | Oil & Gas Operator | Jul 2026 |
| 18208 | McCluskey J Sterling | New York, NY 10128-1008 | Gas Operator | Dec 1989 |
| 18209 | McCluskey Willia | | Oil & Gas Operator | Dec 1990 |
| 18210 | McClymond, B. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2020 |
| 18211 | McClymond, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2001 |
| 18212 | McClymond, LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2009 |
| 18213 | McColl, Francis E. | Le Roy, NY 14482 | Gas Operator | Dec 2025 |
| 18214 | McComb Oil Inc | Stoneboro, PA 16153-3017 | Oil & Gas Operator | Dec 2025 |
| 18215 | McCombs Energy LLC | Houston, TX 77056 | Oil & Gas Operator | Jan 2006 |
| 18216 | McCombs Energy, LTD. | Houston, TX 77056 | Oil & Gas Operator | Aug 2017 |
| 18217 | McCommons Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 2026 |
| 18218 | McConathy & Associates | | Oil & Gas Operator | Dec 1983 |
| 18219 | McConathy Production Co.,Inc. | | Oil & Gas Operator | Jun 1990 |
| 18220 | McConnell And Scully Inc | | Oil & Gas Operator | May 2026 |
| 18221 | McConnell Oil Properties | | Oil Operator | Mar 2026 |
| 18222 | McCool John E | Youngsville, PA 16371 | Oil & Gas Operator | Apr 2026 |
| 18223 | McCord Al Inc | Norman, OK 73072-6720 | Oil & Gas Operator | Feb 2011 |
| 18224 | McCord Exploration Co. | | Oil & Gas Operator | Dec 1990 |
| 18225 | McCord J K | Duncan, OK 73534-0032 | Oil Operator | Mar 2009 |
| 18226 | McCord Oil Co. And T. Walker | | Oil & Gas Operator | Dec 1985 |
| 18227 | McCord-Dale Exploration | | Oil & Gas Operator | May 1986 |
| 18228 | McCord-Goodrich Oil Company | | Oil & Gas Operator | Oct 1991 |
| 18229 | McCorgary Martin E | Arkansas City, KS 67005-5452 | Oil & Gas Operator | Apr 2026 |
| 18230 | McCorgary Operations | | Oil & Gas Operator | Mar 2026 |
| 18231 | McCorkle, Frank R. & Kathleen A. | Sedan, KS 67361 | Oil Operator | Oct 2009 |
| 18232 | McCormack, Lowell Ray | Gainesville, TX 76240 | Oil & Gas Operator | Dec 1993 |
| 18233 | McCormack, Paul H. | Gainesville, TX 76241 | Oil & Gas Operator | Sep 2003 |
| 18234 | McCormick Operating Company | | Oil & Gas Operator | Mar 1984 |
| 18235 | McCormick Operating PRTNSHP | | Oil & Gas Operator | Sep 1985 |
| 18236 | McCormick Operating, L.L.C. | Olney, TX 76374 | Oil Operator | Sep 2015 |
| 18237 | McCormick Production Co, Inc. | Oil City, LA 71061 | Oil & Gas Operator | Jul 2026 |
| 18238 | McCormick, Mark | Java Center, NY 14082 | Gas Operator | Dec 2025 |
| 18239 | McCormick, Ronald R. | Java Center, NY 14082 | Gas Operator | Dec 2025 |
| 18240 | McCormick, Terrance & Anne | Andover, NY 14806 | Oil & Gas Operator | Dec 2025 |
| 18241 | McCormick-Bintliff | | Oil & Gas Operator | Feb 1984 |
| 18242 | McCormick-Bintliff-Pettit | | Oil & Gas Operator | Feb 1984 |
| 18243 | McCormick-Ciroco, Inc. | | Oil & Gas Operator | Jan 1984 |
| 18244 | McCormick-Terra-Bintliff | | Oil & Gas Operator | Dec 1979 |
| 18245 | McCormick-WHB | | Gas Operator | Jan 1984 |
| 18246 | McCort Brian L | Malaga, OH 43757 | Oil & Gas Operator | Dec 2025 |
| 18247 | McCown Engineering | Wichita Falls, TX 76310 | Oil & Gas Operator | Jul 2026 |
| 18248 | McCoy Alex W & Associates | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2009 |
| 18249 | McCoy Petroleum | | Oil & Gas Operator | Aug 1996 |
| 18250 | McCoy Petroleum Corporation | Wichita, KS 67207 | Oil & Gas Operator | May 2026 |
| 18251 | McCoy Production | El Dorado, KS 67042 | Oil Operator | Dec 2019 |
| 18252 | McCoy, Jon | Erie, KS 66733 | Oil Operator | Mar 2026 |
| 18253 | McCracken Energy Services, LLC | Bradford, PA 16701 | Oil & Gas Operator | Dec 2025 |
| 18254 | McCracken Oil & Gas, LLC | Bradford, PA 16701 | Oil & Gas Operator | Dec 2025 |
| 18255 | McCracken, Carl A. III | | Oil & Gas Operator | Dec 2012 |
| 18256 | McCracken, Cory | Bradford, PA 16701 | Oil & Gas Operator | Dec 2025 |
| 18257 | McCracken, H. L. Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2026 |
| 18258 | McCrary & Franklin, Inc. | Post, TX 79356 | Oil & Gas Operator | May 2012 |
| 18259 | McCrary Oil Company, Inc. | College Sta, TX 77840 | Oil & Gas Operator | Sep 2019 |
| 18260 | McCraw Family Limited Partnership (The) | Konawa, OK 74849-5616 | Oil & Gas Operator | Feb 2026 |
| 18261 | McCray, Gordon M. | Clymer, NY 14724 | Gas Operator | Dec 2025 |
| 18262 | McCrea Exploration Company, Inc. | Carrollton, TX 75007 | Oil & Gas Operator | Nov 1995 |
| 18263 | McCullis Resources Co., Inc. | Littleton, CO 80161 | Oil & Gas Operator | May 2026 |
| 18264 | McCulliss Resource Company Inc | Denver, CO 80202 | Oil & Gas Operator | Jun 1999 |
| 18265 | McCulliss Resources Co Inc | Littleton, CO 80161-3248 | Oil & Gas Operator | Jun 2009 |
| 18266 | McCulloch Geothermal Corporation | | Oil & Gas Operator | Jun 1982 |
| 18267 | McCulloch Oil Corp Of Ca | | Oil & Gas Operator | May 1980 |
| 18268 | McCulloch Oil Corp.-Ids | | Oil & Gas Operator | Dec 1981 |
| 18269 | McCullough G W | Norman, OK 73072 | Oil & Gas Operator | Aug 2000 |
| 18270 | McCullough, Richard F. | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 18271 | McCurdy Energy LLC | Midland, TX 79707 | Oil Operator | Sep 2025 |
| 18272 | McCurdy Oil Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2025 |
| 18273 | McCutchin Alma Estate | Dallas, TX 75380 | Oil & Gas Operator | May 2013 |
| 18274 | McCutchin Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Jul 2026 |
| 18275 | McCutchin, Gene | Dallas, TX 75380 | Oil & Gas Operator | Aug 2003 |
| 18276 | McCutchin, Jerry | Dallas, TX 75380 | Oil & Gas Operator | Mar 2008 |
| 18277 | McDaniel Company, Inc., The | Dallas, TX 75230 | Oil & Gas Operator | Jul 2026 |
| 18278 | McDaniel Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Jul 2026 |
| 18279 | McDaniel Petroleum Company, Inc. | | Oil Operator | Jun 2020 |
| 18280 | McDaniel, Willard | Iraan, TX 79744 | Oil & Gas Operator | Nov 2004 |
| 18281 | McDaniel, Willard Jr. Oil Co. | Marble Falls, TX 78654 | Oil & Gas Operator | Mar 2005 |
| 18282 | McDay Energy Corp. | Plano, TX 75024 | Oil & Gas Operator | Jul 2026 |
| 18283 | McDe Energy Company Inc | Enid, OK 73706 | Oil & Gas Operator | May 2009 |
| 18284 | McDonald & Johnson Resources,LLC | Cypress, TX 77429 | Oil & Gas Operator | Dec 2010 |
| 18285 | McDonald & Pomeroy Operating Co. | Pasadena, TX 77506 | Oil & Gas Operator | Aug 2003 |
| 18286 | McDonald Dale E | Frazeysburg, OH 43822 | Oil & Gas Operator | Dec 2025 |
| 18287 | McDonald Energy, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Jul 2026 |
| 18288 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 18289 | McDonald Production, LLC | Lubbock, TX 79408 | Oil Operator | Jul 2026 |
| 18290 | McDonald Ranch Partnership | | Oil Operator | Dec 2025 |
| 18291 | McDonald Resources, LLC | Jefferson, TX 75657 | Oil & Gas Operator | Jul 2026 |
| 18292 | McDonald, Joe | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 1995 |
| 18293 | McDonald, R. A. Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Oct 2002 |
| 18294 | McDonald, Richard A. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Jul 2026 |
| 18295 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 18296 | McDowell And Cook, Inc. | | Oil Operator | Jan 1987 |
| 18297 | McDowell Ranch | Shamrock, TX 79079 | Gas Operator | Jul 2026 |
| 18298 | McElroy Drilling Co., Inc. | | Gas Operator | Dec 1987 |
| 18299 | McElroy John | Sapulpa, OK 74066-6119 | Oil & Gas Operator | Apr 2026 |
| 18300 | McElvain Energy Inc | Denver, CO 80265 | Oil & Gas Operator | Nov 2019 |