| 2301 | Murtha Contracting Inc. | Conneaut, OH 44030 | Oil & Gas Operator | Dec 2009 |
| 2302 | Murvin & Meier Oil Co. | | Oil & Gas Operator | Dec 2020 |
| 2303 | Musgrave, Dalton | | Oil Operator | Dec 2020 |
| 2304 | Musgrove Casey O | | Oil Operator | Oct 1993 |
| 2305 | Musgrove Casey Oil | Ponca City, OK 74602-0391 | Oil & Gas Operator | Jun 2017 |
| 2306 | Musgrove Energy Inc | Ponca City, OK 74602 | Oil & Gas Operator | Dec 2025 |
| 2307 | Musgrove Petrole | | Oil & Gas Operator | Dec 1996 |
| 2308 | Musgrove Produci | | Oil Operator | May 1989 |
| 2309 | Musgrove Producing | El Dorado, KS 67042 | Oil Operator | Apr 2001 |
| 2310 | Muskegon Development Co And Miller Energy Inc An | | Gas Operator | Dec 1997 |
| 2311 | Muskegon Development Company | MT Pleasant, MI 48858 | Oil & Gas Operator | May 2026 |
| 2312 | Muskegon Operating Company LLC | | Oil & Gas Operator | Feb 2026 |
| 2313 | Muslow And Parker | | Oil & Gas Operator | Jul 1994 |
| 2314 | Muslow Oil Industries | | Oil Operator | Jan 1995 |
| 2315 | Musselman, Owen & King Oper.,Inc | Houston, TX 77002 | Oil & Gas Operator | Feb 1998 |
| 2316 | Mustang Drilling | | Oil & Gas Operator | Nov 1996 |
| 2317 | Mustang Drilling, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Aug 2024 |
| 2318 | Mustang Drilling, LTD. | Henderson, TX 75653 | Oil & Gas Operator | May 2008 |
| 2319 | Mustang Energy Corporation | Hays, KS 67601 | Oil Operator | Jan 2026 |
| 2320 | Mustang Energy Inc. | Porter, TX 77365 | Oil & Gas Operator | Mar 2008 |
| 2321 | Mustang Energy L C | | Oil & Gas Operator | Jan 2013 |
| 2322 | Mustang Fuel Cor | | Oil & Gas Operator | Dec 1990 |
| 2323 | Mustang Fuel Corp. Of Oklahoma | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2016 |
| 2324 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2026 |
| 2325 | Mustang Gas Products LLC | Oklahoma City, OK 73114-7406 | Oil & Gas Operator | Sep 2022 |
| 2326 | Mustang Holding, LLC (Finnex) | | Oil & Gas Operator | Feb 2026 |
| 2327 | Mustang Oil & Gas Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2021 |
| 2328 | Mustang Operating Company | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2006 |
| 2329 | Mustang Resources LLC | Houston, TX 77046 | Oil & Gas Operator | Jan 2026 |
| 2330 | Mutch Harry L | | Oil & Gas Operator | Oct 1991 |
| 2331 | Mutch J O | | Gas Operator | Mar 1990 |
| 2332 | Mutschelknaus, Clarence W | Salem, WV 26426-0351 | Oil & Gas Operator | Dec 2021 |
| 2333 | Mutual Oil & Gas Co | Akron, OH 44311 | Oil & Gas Operator | Dec 2000 |
| 2334 | Mutz Oil Operator | | Oil Operator | Dec 1988 |
| 2335 | Muzyl Oil Corp | | Oil & Gas Operator | Mar 2026 |
| 2336 | MV Purchasing LLC | Wichita, KS 67206 | Oil & Gas Operator | Dec 2019 |
| 2337 | MV2 Energy, Inc. | Houston, TX 77069 | Oil & Gas Operator | May 2026 |
| 2338 | MVM Resources Louisiana L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 2339 | MVP Production Inc. | | Oil & Gas Operator | Apr 2005 |
| 2340 | MVRC Partnership | Russell, KS 67655 | Oil Operator | Jan 1992 |
| 2341 | MW Oil, Inc | | Oil & Gas Operator | Jan 2026 |
| 2342 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 2343 | MWJ Producing Company | Midland, TX 79701 | Oil & Gas Operator | Jul 1998 |
| 2344 | MWK Petroleum, LLC | Augusta, KS 67010 | Oil Operator | Jan 2026 |
| 2345 | MWL Energy LLC | Hamlin, TX 79520 | Oil Operator | May 2026 |
| 2346 | MWS Producing, Inc. | Stanton, TX 79782 | Oil & Gas Operator | May 2026 |
| 2347 | MWWD Operator, LLC | Victoria, TX 77904 | Oil Operator | May 2026 |
| 2348 | MXP Operating LLC | Covington, TX 76093 | Oil & Gas Operator | Jan 2026 |
| 2349 | My Hop Mineral | Moorhead, MN 56560 | Oil & Gas Operator | May 2026 |
| 2350 | My Investments Too LLC | | Oil Operator | Feb 2026 |
| 2351 | Myco Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2003 |
| 2352 | Myco Industries, Inc. | Artesia, NM 88211 | Oil & Gas Operator | Feb 2015 |
| 2353 | Myco Petroleum | Lovington, NM 88260 | Oil & Gas Operator | May 2026 |
| 2354 | Myd, Inc. | Irving, TX 75062 | Oil & Gas Operator | Mar 1998 |
| 2355 | Myers Drilling And Exploration Inc. | Sedan, KS 67361 | Oil Operator | Aug 2022 |
| 2356 | Myers Drilling Company | Barboursville, WV 25504 | Oil & Gas Operator | Dec 2024 |
| 2357 | Myers Robert W J | | Oil Operator | Jun 1991 |
| 2358 | Myers, A. J. | Jacksboro, TX 76458 | Oil & Gas Operator | May 2026 |
| 2359 | Myers, Gus & Annie | Sedan, KS 67361 | Oil Operator | Aug 2017 |
| 2360 | Myers, James B. | Olney, TX 76374 | Oil & Gas Operator | May 2026 |
| 2361 | Myers, Robert L | | Oil Operator | Feb 2026 |
| 2362 | Myjo Oil Corporation | Breckenridge, TX 76024 | Oil Operator | Jul 1996 |
| 2363 | Myriad Resources Corporation | Pampa, TX 79066 | Oil & Gas Operator | May 2026 |
| 2364 | Mystique Developments | Denver, CO 80202 | Oil & Gas Operator | Dec 1997 |
| 2365 | Mystique Resources Company | Aurora, CO 80016 | Oil & Gas Operator | Feb 2023 |
| 2366 | Myung And Associates, Inc. | Houston, TX 77056 | Oil & Gas Operator | May 2000 |
| 2367 | MZ Operating, Inc | Midland, TX 79701 | Oil & Gas Operator | Apr 1994 |