| 20301 | Murchison Trusts | | Gas Operator | Sep 2003 |
| 20302 | Murchison, G. B. Trust | Dallas, TX 75283 | Oil & Gas Operator | Sep 1994 |
| 20303 | Murdoch Oil Co Inc | Bluff, UT 84512 | Oil & Gas Operator | Jun 2010 |
| 20304 | Murex Petroleum Corporation | Humble, TX 77347 | Oil & Gas Operator | Feb 2025 |
| 20305 | Murexco Petroleum, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Oct 1996 |
| 20306 | Murfin Drilling | | Oil & Gas Operator | Jul 1997 |
| 20307 | Murfin Drilling Company Inc | Wichita, KS 67202 | Oil & Gas Operator | Feb 2025 |
| 20308 | Murjo Oil & Royalty Company | Fort Worth, TX 76121 | Oil & Gas Operator | Dec 2024 |
| 20309 | Murk, James M. | Wheaton, IL 60189 | Gas Operator | Jan 1999 |
| 20310 | Muroz International Group Inc | Houston, TX 77056 | Oil Operator | Apr 2025 |
| 20311 | Murphree Brothers Production | Monahans, TX 79756 | Oil & Gas Operator | Apr 2025 |
| 20312 | Murphree Production | Monahans, TX 79756 | Oil & Gas Operator | Jul 2014 |
| 20313 | Murphrey Oil Co | | Oil Operator | Jan 2025 |
| 20314 | Murphy & Associates, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Oct 1996 |
| 20315 | Murphy - Sun | | Oil & Gas Operator | May 1989 |
| 20316 | Murphy D V | | Oil Operator | Dec 1989 |
| 20317 | Murphy Energy Services, LP | Saratoga, TX 77585 | Oil Operator | Dec 2018 |
| 20318 | Murphy Exp & Prod Co.-USA | | Oil & Gas Operator | May 2014 |
| 20319 | Murphy Expl. & Prod. Co. - USA | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 20320 | Murphy Exploration & Prod. Co. | Houston, TX 77094 | Oil & Gas Operator | Jun 2011 |
| 20321 | Murphy Exploration & Production | Houston, TX 77024 | Oil Operator | Dec 2024 |
| 20322 | Murphy Helen Colpitt Trust | Collinsville, OK 74021-0128 | Oil & Gas Operator | May 2002 |
| 20323 | Murphy Jack L | Tulsa, OK 74104-4915 | Oil Operator | Mar 2015 |
| 20324 | Murphy Oil Company Inc | Lancaster, OH 43130 | Oil & Gas Operator | Dec 2023 |
| 20325 | Murphy Oil USA Inc | New Orleans, LA 70161 | Oil & Gas Operator | Jan 1993 |
| 20326 | Murphy Operating Corp | Roswell, NM 88202 | Oil & Gas Operator | Apr 1998 |
| 20327 | Murphy Prod Inc | Vanderbilt, PA 15486-1001 | Oil & Gas Operator | Dec 2024 |
| 20328 | Murphy Production Co. (Inc.) | | Oil & Gas Operator | Apr 1991 |
| 20329 | Murphy Production Corp. | Austin, TX 78731 | Oil & Gas Operator | Sep 2013 |
| 20330 | Murphy S J Oil & Gas Inc | Edmond, OK 73034 | Oil & Gas Operator | Jan 2025 |
| 20331 | Murphy Sheldon L & Loretta | Newcastle, WY 82701 | Oil & Gas Operator | Feb 2025 |
| 20332 | Murphy, Bill W. Operating Co,Inc | Richardson, TX 75080 | Oil & Gas Operator | Apr 2025 |
| 20333 | Murphy, Charles H. | Altoona, KS 66710 | Oil Operator | Jul 2022 |
| 20334 | Murphy, Douglas S. | Sherman, NY 14781 | Gas Operator | Dec 2023 |
| 20335 | Murphy, Earl M. | Madison, KS 66860 | Oil Operator | Jun 1999 |
| 20336 | Murphy, K. P. Oil Operator | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 20337 | Murray Hill Energy, Inc. | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2017 |
| 20338 | Murray J. Evans | | Oil Operator | Mar 1985 |
| 20339 | Murray Oil And Gas LLC | Greensburg, KS 67054 | Oil & Gas Operator | Dec 2024 |
| 20340 | Murray, Tom Enterprises | Monahans, TX 79756 | Oil & Gas Operator | Apr 2025 |
| 20341 | Murray-Teague Assoc. | | Oil Operator | Dec 2005 |
| 20342 | Murtha Contracting Inc. | Conneaut, OH 44030 | Oil & Gas Operator | Dec 2009 |
| 20343 | Murvin & Meier Oil Co. | | Oil & Gas Operator | Dec 2020 |
| 20344 | Musgrave, Dalton | | Oil Operator | Dec 2020 |
| 20345 | Musgrove Casey O | | Oil Operator | Oct 1993 |
| 20346 | Musgrove Energy Inc | Ponca City, OK 74602 | Oil & Gas Operator | Aug 2024 |
| 20347 | Musgrove Petrole | | Oil & Gas Operator | Dec 1996 |
| 20348 | Musgrove Produci | | Oil Operator | May 1989 |
| 20349 | Musgrove Producing | El Dorado, KS 67042 | Oil Operator | Apr 2001 |
| 20350 | Musgrove, Casey Oil | Ponca City, OK 74602-0391 | Oil & Gas Operator | Jun 2017 |
| 20351 | Muskegon Development Co And Miller Energy Inc An | | Gas Operator | Dec 1997 |
| 20352 | Muskegon Development Company | MT Pleasant, MI 48858 | Oil & Gas Operator | Apr 2025 |
| 20353 | Muskegon Operating Company LLC | | Oil & Gas Operator | Feb 2025 |
| 20354 | Muslow And Parker | | Oil & Gas Operator | Jul 1994 |
| 20355 | Muslow Oil Industries | | Oil Operator | Jan 1995 |
| 20356 | Musselman, Owen & King Oper.,Inc | Houston, TX 77002 | Oil & Gas Operator | Feb 1998 |
| 20357 | Musshafen, Denis | Linwood, NY 14486 | Gas Operator | Dec 2023 |
| 20358 | Mustang Drilling | | Oil & Gas Operator | Nov 1996 |
| 20359 | Mustang Drilling, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Aug 2024 |
| 20360 | Mustang Drilling, LTD. | Henderson, TX 75653 | Oil & Gas Operator | May 2008 |
| 20361 | Mustang Energy Corporation | Hays, KS 67601 | Oil Operator | Dec 2024 |
| 20362 | Mustang Energy Inc. | Porter, TX 77365 | Oil & Gas Operator | Mar 2008 |
| 20363 | Mustang Energy L C | | Oil & Gas Operator | Jan 2013 |
| 20364 | Mustang Fuel Cor | | Oil & Gas Operator | Dec 1990 |
| 20365 | Mustang Fuel Corp. Of Oklahoma | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2016 |
| 20366 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2025 |
| 20367 | Mustang Gas Products LLC | Oklahoma City, OK 73114-7406 | Oil & Gas Operator | Sep 2022 |
| 20368 | Mustang Holding, LLC (Finnex) | | Oil & Gas Operator | Feb 2025 |
| 20369 | Mustang Oil & Gas Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2021 |
| 20370 | Mustang Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2006 |
| 20371 | Mustang Resources LLC | Houston, TX 77256 | Oil & Gas Operator | Jan 2025 |
| 20372 | Mustang Transport Company | Oklahoma City, OK 73106 | Oil Operator | Jul 1993 |
| 20373 | Mutch Harry L | | Oil & Gas Operator | Oct 1991 |
| 20374 | Mutch J O | | Gas Operator | Mar 1990 |
| 20375 | Mutch Oil And Gas Development Inc | | Oil & Gas Operator | Dec 2004 |
| 20376 | Mutschelknaus, Clarence W | Salem, WV 26426-0351 | Oil & Gas Operator | Dec 2021 |
| 20377 | Mutual Oil & Gas Co | Akron, OH 44313 | Oil & Gas Operator | Dec 2001 |
| 20378 | Mutz Oil Operator | | Oil Operator | Dec 1988 |
| 20379 | Muzyl Oil Corp | | Oil & Gas Operator | Feb 2025 |
| 20380 | MV2 Energy, Inc. | Houston, TX 77069 | Oil & Gas Operator | Apr 2025 |
| 20381 | MVM Resources Louisiana L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 20382 | MVP Production Inc. | | Oil & Gas Operator | Apr 2005 |
| 20383 | MVRC Partnership | Russell, KS 67655 | Oil Operator | Jan 1992 |
| 20384 | MW Oil, Inc | | Oil & Gas Operator | Dec 2024 |
| 20385 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 20386 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 20387 | MWK Petroleum, LLC | Augusta, KS 67010 | Oil Operator | Dec 2024 |
| 20388 | MWL Energy LLC | Hamlin, TX 79520 | Oil Operator | Apr 2025 |
| 20389 | MWS Producing, Inc. | Stanton, TX 79782 | Oil & Gas Operator | Apr 2025 |
| 20390 | MWWD Operator, LLC | Victoria, TX 77904 | Oil Operator | Apr 2025 |
| 20391 | MXP Operating LLC | Covington, TX 76093 | Oil & Gas Operator | Jan 2025 |
| 20392 | My Hop Mineral | Moorhead, MN 56560 | Oil & Gas Operator | Apr 2025 |
| 20393 | My Investments Too LLC | | Oil Operator | Oct 2024 |
| 20394 | Myco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2003 |
| 20395 | Myco Industries, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Feb 2015 |
| 20396 | Myco Petroleum | Lovington, NM 88260 | Oil & Gas Operator | Apr 2025 |
| 20397 | Myd, Inc. | Irving, TX 75062 | Oil & Gas Operator | Mar 1998 |
| 20398 | Myers & Hicks Gas Co | | Gas Operator | Dec 2021 |
| 20399 | Myers Drilling And Exploration Inc. | Sedan, KS 67361 | Oil Operator | Aug 2022 |
| 20400 | Myers Drilling Company | Barboursville, WV 25504 | Oil & Gas Operator | Dec 2023 |