| 1201 | Mead Oil LLC | Sheffield, PA 16347-1022 | Oil & Gas Operator | Dec 2025 |
| 1202 | Mead, Nathaniel E | Irving, NY 14081 | Gas Operator | Dec 2024 |
| 1203 | Meadco Properties | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 1204 | Meadco Properties LTD | Midland, TX 79702 | Oil & Gas Operator | Sep 2019 |
| 1205 | Meade Energy Corporation | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Dec 2025 |
| 1206 | Meade James C | Oklahoma City, OK 73118-1544 | Gas Operator | Apr 2015 |
| 1207 | Meador Enterprises, Inc. | Kilgore, TX 75662 | Oil Operator | Oct 2023 |
| 1208 | Meador Hubbell Meador Inc | Beggs, OK 74421-0794 | Oil & Gas Operator | Apr 2020 |
| 1209 | Meador Land Company | Eldorado, TX 76936 | Oil & Gas Operator | Feb 2026 |
| 1210 | Meador Oil Company Inc | Lubbock, TX 79415 | Oil & Gas Operator | Oct 2022 |
| 1211 | Meador, John E. | Eldorado, TX 76936 | Oil & Gas Operator | Apr 2014 |
| 1212 | Meador, T. C. | San Angelo, TX 76902 | Oil & Gas Operator | Feb 2026 |
| 1213 | Meadors Jr J W Trust | Bixby, OK 74008-0151 | Oil & Gas Operator | Aug 2013 |
| 1214 | Meadors Operating Co | Jennings, OK 74038-0233 | Oil Operator | Nov 2025 |
| 1215 | Meadow Deep LLC | | Oil & Gas Operator | Dec 2025 |
| 1216 | Meadow Ridge Development, LLC | Washington, PA 15301 | Oil & Gas Operator | Dec 2021 |
| 1217 | Meadowbrook Oil Corporation Of Ok Inc | Del City, OK 73115-3608 | Oil & Gas Operator | Dec 2025 |
| 1218 | Meadowlark Operating Co | | Oil & Gas Operator | Nov 2025 |
| 1219 | Meadows Jr, S. L. Production Inc. | Ravenswood, WV 26164-0022 | Oil & Gas Operator | Dec 2021 |
| 1220 | Meadows Oil Company | Plano, TX 75075 | Oil & Gas Operator | Aug 2004 |
| 1221 | Meadows, Kelly J | | Oil & Gas Operator | Mar 2015 |
| 1222 | Meadville Forging Co LP | Meadville, PA 16335-0459 | Gas Operator | Dec 1997 |
| 1223 | Means Oil Co. | Corsicana, TX 75110 | Oil & Gas Operator | Feb 2013 |
| 1224 | Means Oil Company, LLC | Corsicana, TX 75110 | Oil & Gas Operator | Feb 2026 |
| 1225 | Means, Frank L. | Corsicana, TX 75110 | Oil & Gas Operator | Jan 2001 |
| 1226 | Mears, John C. | Chanute, KS 66720 | Oil Operator | Dec 2017 |
| 1227 | Meason Oper. Co. For Cinco Energy Corp. | | Oil & Gas Operator | Sep 2000 |
| 1228 | Meason Operating Company | Natchez, MS 39121 | Oil & Gas Operator | Dec 2011 |
| 1229 | Meb, LLC | Austin, TX 78737 | Oil Operator | Feb 2026 |
| 1230 | Mec-Goodrich Oil Co. | | Oil & Gas Operator | Feb 1985 |
| 1231 | Meco IV Holdco, LLC | Lakewood, CO 80227 | Oil & Gas Operator | Jul 2022 |
| 1232 | Meco IV, LLC | Lakewood, CO 80227 | Oil & Gas Operator | Jul 2021 |
| 1233 | Mecom Energy Corporation | Houston, TX 77030 | Oil & Gas Operator | Jan 1999 |
| 1234 | Medallion Calif Properties Co. | | Oil & Gas Operator | Dec 2003 |
| 1235 | Medallion Energy Inc | Norman, OK 73072-7436 | Oil & Gas Operator | Aug 2004 |
| 1236 | Medallion Exploration | Holladay, UT 84117 | Oil & Gas Operator | Dec 2015 |
| 1237 | Medallion Exploration Corp. | Midvale, UT 84047 | Oil & Gas Operator | Oct 1998 |
| 1238 | Medallion Oil Company | Houston, TX 77251 | Oil & Gas Operator | Jan 2012 |
| 1239 | Medallion Petroleum, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2015 |
| 1240 | Medallion Production Company | Tulsa, OK 74103 | Oil & Gas Operator | May 1997 |
| 1241 | Medders Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2026 |
| 1242 | Medicine Bow Operating Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2014 |
| 1243 | Medina Res Dev Co LLC | Cambridge Springs, PA 16403-3447 | Oil & Gas Operator | Dec 2025 |
| 1244 | Medlen, Dean S. | Rantoul, KS 66079 | Oil Operator | Aug 1993 |
| 1245 | Medora Minerals, LLC | | Oil & Gas Operator | Dec 2025 |
| 1246 | Meeder, Curt N. | Ripley, NY 14775 | Gas Operator | Dec 2024 |
| 1247 | Meehan Doug | Coweta, OK 74429-0813 | Oil & Gas Operator | Apr 2020 |
| 1248 | Meeker & Company | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 1249 | Meeker, Dan Management, Inc. | Fort Worth, TX 76107 | Oil & Gas Operator | Aug 2007 |
| 1250 | Meeks, Mike | Tulsa, OK 74136 | Oil Operator | Jan 2025 |
| 1251 | Meerkat Logistics And Operations LLC | Tuscaloosa, AL 35401 | Oil Operator | Dec 2025 |
| 1252 | Mega Drilling Company | | Oil Operator | Feb 1984 |
| 1253 | Mega Energy LLC | Gillette, WY 82718 | Gas Operator | Dec 2025 |
| 1254 | Mega Natural Gas Co | Tulsa, OK 74133 | Oil & Gas Operator | Jul 1996 |
| 1255 | Mega Petroleum C | | Oil Operator | Jun 1990 |
| 1256 | Mega Petroleum Corporation | Dallas, TX 75202 | Gas Operator | Feb 1998 |
| 1257 | Mega Resources Inc | Dallas, TX 75225-0186 | Oil & Gas Operator | Jan 2001 |
| 1258 | Megadon Enterprises, Inc | Salt Lake City, UT 84121 | Oil Operator | May 2020 |
| 1259 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 1260 | Megan Oil & Gas Co., Inc. | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 1261 | Megargel Drilling Company | Megargel, TX 76370 | Oil Operator | Nov 1998 |
| 1262 | Megas Corp | North Ridgevill, OH 44039 | Oil & Gas Operator | Dec 1984 |
| 1263 | Megg, L.P. | Borger, TX 79008 | Oil & Gas Operator | Feb 2026 |
| 1264 | Mego Resources, LLC | Taft, TX 78390 | Oil & Gas Operator | Feb 2026 |
| 1265 | Mehaffey Investments, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Feb 2026 |
| 1266 | Mei Operating Company | Lafayette, LA 70598 | Oil & Gas Operator | Aug 1997 |
| 1267 | Meier Joe Oil Op | | Oil Operator | Jul 1983 |
| 1268 | Mel Cox Transports Inc | Comanche, OK 73529-7640 | Oil & Gas Operator | Jul 2022 |
| 1269 | Mel-Ray Oil Company | Nowata, OK 74048-0149 | Oil & Gas Operator | Mar 2004 |
| 1270 | Melanie Oil Dril USA Inc | Millersburg, OH 44654 | Oil & Gas Operator | Dec 1989 |
| 1271 | Melcar Production | Tuscola, TX 79562 | Oil & Gas Operator | Feb 2026 |
| 1272 | Meleen, Catherine M. & Ruch, Jerry E. | Westfield, NY 14787 | Gas Operator | Dec 2024 |
| 1273 | Melland Drilling | | Oil Operator | Nov 1992 |
| 1274 | Mellenco Inc | Scottsdale, AZ 85253 | Oil & Gas Operator | Dec 1990 |
| 1275 | Mello-Dy Resources, LLC | Devine, TX 78016 | Oil Operator | Feb 2026 |
| 1276 | Mellon Creek Operating Co. | Victoria, TX 77901 | Oil & Gas Operator | Jun 1993 |
| 1277 | Mellon Oil Unit | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 1278 | Melren Oil & Gas Expl., Inc. | | Gas Operator | Nov 1989 |
| 1279 | Melrose Group In | | Oil Operator | Feb 1994 |
| 1280 | Melrose Operating Company | Dallas, TX 75201 | Oil & Gas Operator | Sep 2011 |
| 1281 | Mels Water Service Inc | Lysite, WY 82642 | Oil Operator | Mar 2013 |
| 1282 | Melson Oil & Gas Inc | Broken Arrow, OK 74014 | Oil & Gas Operator | Dec 2025 |
| 1283 | Melton Operating Co. | Friendswood, TX 77546 | Oil & Gas Operator | Jul 2005 |
| 1284 | Melton, Joe, DRLG. Co., Inc. | Midland, TX 79704 | Oil & Gas Operator | Dec 2004 |
| 1285 | Melton, Kenneth | Wann, OK 74083 | Oil Operator | Sep 2025 |
| 1286 | Meltzer Oil Comp | | Oil Operator | Dec 1983 |
| 1287 | Melvin Or Kathleen Turnbow | Portales, NM 88130 | Oil & Gas Operator | Mar 2006 |
| 1288 | Melzer Exploration Company | Midland, TX 79702-2083 | Oil & Gas Operator | May 2013 |
| 1289 | Mem Partnership LP, A General Partnership | Spring, TX 77393 | Oil Operator | Sep 2025 |
| 1290 | Memaca Petroleum Corporation | | Oil & Gas Operator | Jan 1990 |
| 1291 | Memorial Exploration Company | Saint Louis, MO 63105 | Oil & Gas Operator | Aug 1996 |
| 1292 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 1293 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 1294 | Mendell Davis Gas Partners LLC | | Oil & Gas Operator | Dec 2013 |
| 1295 | Mendell Finisterre II LLC | | Oil & Gas Operator | Jun 2017 |
| 1296 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 1297 | Meng Oper & Expl Co | | Oil & Gas Operator | Dec 1989 |
| 1298 | Meng, Charles H | Lexington, KY 40502 | Gas Operator | Dec 2023 |
| 1299 | Menoah Petroleum Inc | | Oil & Gas Operator | Dec 2024 |
| 1300 | Mentor Energy & Resources | Mentor, OH 44060 | Oil & Gas Operator | Dec 2019 |