| 2401 | Musselman, Owen & King Oper.,Inc | Houston, TX 77002 | Oil & Gas Operator | Feb 1998 |
| 2402 | Mustang Drilling | | Oil & Gas Operator | Nov 1996 |
| 2403 | Mustang Drilling, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Aug 2024 |
| 2404 | Mustang Drilling, LTD. | Henderson, TX 75653 | Oil & Gas Operator | May 2008 |
| 2405 | Mustang Energy Corporation | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 2406 | Mustang Energy Inc. | Porter, TX 77365 | Oil & Gas Operator | Mar 2008 |
| 2407 | Mustang Energy L C | | Oil & Gas Operator | Jan 2013 |
| 2408 | Mustang Fuel Cor | | Oil & Gas Operator | Dec 1990 |
| 2409 | Mustang Fuel Corp. Of Oklahoma | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2016 |
| 2410 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Oct 2025 |
| 2411 | Mustang Gas Products LLC | Oklahoma City, OK 73114-7406 | Oil & Gas Operator | Sep 2022 |
| 2412 | Mustang Holding, LLC (Finnex) | | Oil & Gas Operator | Nov 2025 |
| 2413 | Mustang Oil & Gas Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2021 |
| 2414 | Mustang Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2006 |
| 2415 | Mustang Resources LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 2416 | Mutch Harry L | | Oil & Gas Operator | Oct 1991 |
| 2417 | Mutch J O | | Gas Operator | Mar 1990 |
| 2418 | Mutch Oil And Gas Development Inc | | Oil & Gas Operator | Dec 2004 |
| 2419 | Mutschelknaus, Clarence W | Salem, WV 26426-0351 | Oil & Gas Operator | Dec 2021 |
| 2420 | Mutual Oil & Gas Co | Akron, OH 44311 | Oil & Gas Operator | Dec 2000 |
| 2421 | Mutz Oil Operator | | Oil Operator | Dec 1988 |
| 2422 | Muzyl Oil Corp | | Oil & Gas Operator | Oct 2025 |
| 2423 | MV Purchasing LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 2424 | MV2 Energy, Inc. | Houston, TX 77069 | Oil & Gas Operator | Dec 2025 |
| 2425 | MVM Resources Louisiana L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 2426 | MVP Production Inc. | | Oil & Gas Operator | Apr 2005 |
| 2427 | MVRC Partnership | Russell, KS 67655 | Oil Operator | Jan 1992 |
| 2428 | MW Oil, Inc | | Oil & Gas Operator | Jun 2025 |
| 2429 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 2430 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 2431 | MWK Petroleum, LLC | Augusta, KS 67010 | Oil Operator | Jun 2025 |
| 2432 | MWL Energy LLC | Hamlin, TX 79520 | Oil Operator | Dec 2025 |
| 2433 | MWS Producing, Inc. | Stanton, TX 79782 | Oil & Gas Operator | Dec 2025 |
| 2434 | MWWD Operator, LLC | Victoria, TX 77904 | Oil Operator | Dec 2025 |
| 2435 | MXP Operating LLC | Covington, TX 76093 | Oil & Gas Operator | Aug 2025 |
| 2436 | My Hop Mineral | Moorhead, MN 56560 | Oil & Gas Operator | Dec 2025 |
| 2437 | My Investments Too LLC | | Oil Operator | Oct 2025 |
| 2438 | Myco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2003 |
| 2439 | Myco Industries, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Feb 2015 |
| 2440 | Myco Petroleum | Lovington, NM 88260 | Oil & Gas Operator | Dec 2025 |
| 2441 | Myd, Inc. | Irving, TX 75062 | Oil & Gas Operator | Mar 1998 |
| 2442 | Myers Drilling And Exploration Inc. | Sedan, KS 67361 | Oil Operator | Aug 2022 |
| 2443 | Myers Drilling Company | Barboursville, WV 25504 | Oil & Gas Operator | Dec 2024 |
| 2444 | Myers Robert W J | | Oil Operator | Jun 1991 |
| 2445 | Myers, A. J. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2025 |
| 2446 | Myers, Gus & Annie | Sedan, KS 67361 | Oil Operator | Aug 2017 |
| 2447 | Myers, James B. | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 2448 | Myers, Robert L | | Oil Operator | Aug 2025 |
| 2449 | Myjo Oil Corporation | Breckenridge, TX 76024 | Oil Operator | Jul 1996 |
| 2450 | Myriad Resources Corporation | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 2451 | Mystique Developments | Denver, CO 80202 | Oil & Gas Operator | Dec 1997 |
| 2452 | Mystique Resources Company | Aurora, CO 80016 | Oil & Gas Operator | Feb 2023 |
| 2453 | Myung And Associates, Inc. | Houston, TX 77056 | Oil & Gas Operator | May 2000 |
| 2454 | MZ Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |