| 7201 | McOsker Bros., Inc. | San Antonio, TX 78264 | Oil & Gas Operator | Aug 2003 |
| 7202 | McQueen Ed & Company Inc | Lindsey, OK 73052 | Oil & Gas Operator | Apr 2014 |
| 7203 | MCR Operating Group | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2026 |
| 7204 | McRae & Henry LTD | Golden, CO 80401 | Oil & Gas Operator | May 2022 |
| 7205 | McRae Exploration & Prod., Inc. | Houston, TX 77064 | Oil & Gas Operator | Feb 2017 |
| 7206 | McRae, Nathan Rathburn | Hebbronville, TX 78361 | Oil & Gas Operator | Apr 1994 |
| 7207 | McReynolds, Doyse | Granbury, TX 76048 | Oil & Gas Operator | Apr 2019 |
| 7208 | McShane, J. Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2004 |
| 7209 | MCZ, Inc. | Houston, TX 77026 | Oil & Gas Operator | Sep 1990 |
| 7210 | MD America Energy, LLC | Houston, TX 77224 | Oil & Gas Operator | Apr 2022 |
| 7211 | MDC Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Oct 2022 |
| 7212 | MDC Texas Operator LLC | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 7213 | MDF Oil Company | Floresville, TX 78114 | Oil Operator | Feb 2026 |
| 7214 | MDM Energy, Inc. | The Colony, TX 75056 | Oil & Gas Operator | Feb 2026 |
| 7215 | Me-Tex Oil & Gas, Inc. | Hobbs, NM 88241 | Oil & Gas Operator | Feb 2026 |
| 7216 | Me-Tex Supply Company | Hobbs, NM 88240 | Oil & Gas Operator | Jun 1993 |
| 7217 | Meadco Properties | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 7218 | Meade Energy Corporation | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Dec 2025 |
| 7219 | Meador Enterprises, Inc. | Kilgore, TX 75662 | Oil Operator | Oct 2023 |
| 7220 | Meador Land Company | Eldorado, TX 76936 | Oil & Gas Operator | Feb 2026 |
| 7221 | Meador, John E. | Eldorado, TX 76936 | Oil & Gas Operator | Apr 2014 |
| 7222 | Meador, T. C. | San Angelo, TX 76902 | Oil & Gas Operator | Feb 2026 |
| 7223 | Meadows Oil Company | Plano, TX 75075 | Oil & Gas Operator | Aug 2004 |
| 7224 | Means Oil Co. | Corsicana, TX 75110 | Oil & Gas Operator | Feb 2013 |
| 7225 | Means Oil Company, LLC | Corsicana, TX 75110 | Oil & Gas Operator | Feb 2026 |
| 7226 | Means, Frank L. | Corsicana, TX 75110 | Oil & Gas Operator | Jan 2001 |
| 7227 | Meason Operating Company | Natchez, MS 39121 | Oil & Gas Operator | Dec 2011 |
| 7228 | Meb, LLC | Austin, TX 78737 | Oil Operator | Feb 2026 |
| 7229 | Meco IV Holdco, LLC | Lakewood, CO 80227 | Oil & Gas Operator | Jul 2022 |
| 7230 | Meco IV, LLC | Lakewood, CO 80227 | Oil & Gas Operator | Jul 2021 |
| 7231 | Mecom Energy Corporation | Houston, TX 77030 | Oil & Gas Operator | Jan 1999 |
| 7232 | Medallion Exploration Corp. | Midvale, UT 84047 | Oil & Gas Operator | Oct 1998 |
| 7233 | Medallion Oil Company | Houston, TX 77251 | Oil & Gas Operator | Jan 2012 |
| 7234 | Medallion Petroleum, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2015 |
| 7235 | Medallion Production Company | Tulsa, OK 74103 | Oil & Gas Operator | May 1997 |
| 7236 | Medders Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 7237 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 7238 | Meeker & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 7239 | Meeker, Dan Management, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Aug 2007 |
| 7240 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 7241 | Megargel Drilling Company | Megargel, TX 76370 | Oil Operator | Nov 1998 |
| 7242 | Megg, L.P. | Borger, TX 79008 | Oil & Gas Operator | Feb 2026 |
| 7243 | Mego Resources, LLC | Taft, TX 78390 | Oil & Gas Operator | Feb 2026 |
| 7244 | Mehaffey Investments, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Feb 2026 |
| 7245 | Mei Operating Company | Lafayette, LA 70598 | Oil & Gas Operator | Aug 1997 |
| 7246 | Melcar Production | Tuscola, TX 79562 | Oil & Gas Operator | Feb 2026 |
| 7247 | Mello-Dy Resources, LLC | Devine, TX 78016 | Oil Operator | Feb 2026 |
| 7248 | Mellon Creek Operating Co. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1993 |
| 7249 | Mellon Oil Unit | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 7250 | Melrose Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2011 |
| 7251 | Melton Operating Co. | Friendswood, TX 77546 | Oil & Gas Operator | Jul 2005 |
| 7252 | Melton, Joe, DRLG. Co., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 7253 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |
| 7254 | Memorial Exploration Company | Saint Louis, MO 63105 | Oil & Gas Operator | Aug 1996 |
| 7255 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 7256 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 7257 | Mer Resources | Edmond, OK 73013 | Oil & Gas Operator | Feb 2026 |
| 7258 | Mercantile Oil & Gas Prod. Corp. | Galena Park, TX 77547 | Oil & Gas Operator | Jun 2016 |
| 7259 | Mercury Exploration Co. | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2006 |
| 7260 | Mercury Operating, LLC | Dallas, TX 75208 | Oil & Gas Operator | Feb 2026 |
| 7261 | Mercy Oil And Gas, LP | Aransas Pass, TX 78335 | Oil & Gas Operator | Feb 2026 |
| 7262 | Mereken Energy Corp. | Fort Worth, TX 76102 | Gas Operator | Feb 2006 |
| 7263 | Merenco | Midland, TX 79702 | Oil & Gas Operator | Dec 1996 |
| 7264 | Merex Resources, Inc. | Amarillo, TX 79159 | Oil & Gas Operator | Sep 2019 |
| 7265 | Meridian Exploration Corp. | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2021 |
| 7266 | Meridian Interests, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Aug 2003 |
| 7267 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 7268 | Meridian Oil Inc.-Midland | Midland, TX 79702 | Oil & Gas Operator | Jul 1996 |
| 7269 | Meridian Oil Production Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 2024 |
| 7270 | Meridian Resource & Expl Co, The | Houston, TX 77077 | Oil & Gas Operator | Dec 2000 |
| 7271 | Meridian Resource & Expl LLC,The | Houston, TX 77094 | Oil & Gas Operator | Nov 2012 |
| 7272 | Merimac Investments, Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Jan 1997 |
| 7273 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 7274 | Merit Energy Company, LLC | Dallas, TX 75009 | Oil & Gas Operator | Sep 2025 |
| 7275 | Merit Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | May 1994 |
| 7276 | Meritage Energy Company LLC | Denver, CO 80202 | Oil & Gas Operator | May 2013 |
| 7277 | Merkaz Drilling, LLC | Dallas, TX 75229 | Oil Operator | Feb 2026 |
| 7278 | Merkin LLC | Austin, TX 78737 | Oil Operator | Feb 2026 |
| 7279 | Merlon Texas, Inc. | Houston, TX 77056 | Oil Operator | Jun 2013 |
| 7280 | Merrico Resources, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Mar 2008 |
| 7281 | Merrill Operating, LLC | Snyder, TX 79550 | Oil Operator | Apr 2016 |
| 7282 | Merrimac Energy Corp. | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 7283 | Merrion Oil & Gas Corp | Farmington, NM 87401 | Oil & Gas Operator | Dec 2025 |
| 7284 | Merritt Operating, Inc. | Mineola, TX 75773 | Oil & Gas Operator | Feb 2026 |
| 7285 | Merritt, William Kevin | Dallas, TX 75225 | Oil & Gas Operator | Dec 1994 |
| 7286 | Merta, Mike | Alice, TX 78333 | Oil & Gas Operator | Aug 2005 |
| 7287 | Mertz Energy LLC | Houston, TX 77098 | Oil & Gas Operator | Jan 2025 |
| 7288 | Merzbacher, George F. Jr. | Robstown, TX 78380 | Oil & Gas Operator | May 1994 |
| 7289 | Mesa Chica Corp. | San Antonio, TX 78278 | Oil & Gas Operator | May 2018 |
| 7290 | Mesa Energy, Inc. | Austin, TX 78755 | Oil & Gas Operator | Dec 2013 |
| 7291 | Mesa Operating Co. | Irving, TX 75039 | Oil & Gas Operator | Aug 1997 |
| 7292 | Mesa Operating LTD Partnership | Amarillo, TX 79189 | Oil & Gas Operator | May 1994 |
| 7293 | Mesa Operating, LLC | Plano, TX 75093 | Oil & Gas Operator | Feb 2026 |
| 7294 | Mesa Ridge Holdings LLC | Abilene, TX 79603 | Oil Operator | Feb 2026 |
| 7295 | Mesa VIsta Operating, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2026 |
| 7296 | Mescalero Energy, Inc. | San Antonio, TX 78231 | Oil & Gas Operator | Aug 2003 |
| 7297 | Mesquite Land & Minerals Co. | Albany, TX 76430 | Oil Operator | Feb 2026 |
| 7298 | Mesquite Oil & Gas Production | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 7299 | Mesquite SWD Inc | Carlsbad, NM 88221 | Oil & Gas Operator | Feb 2026 |
| 7300 | Messer Helium Cliffside LLC | Bridgewater, NJ 08807 | Gas Operator | Feb 2026 |