| 1201 | Louisiana Tank, Inc. | | Oil Operator | Mar 2023 |
| 1202 | Louisiana-Caddo Invest, Inc. | | Oil & Gas Operator | Jun 2008 |
| 1203 | Louisiana-Hunt Petroleum Corp. | | Oil & Gas Operator | Dec 1985 |
| 1204 | Louisville Gas & Electric Co | Louisville, KY 40241 | Oil Operator | Dec 2023 |
| 1205 | Loundagin N B | Casper, WY 82602 | Oil & Gas Operator | Sep 2015 |
| 1206 | Loutex Energy, Inc. | | Oil & Gas Operator | Nov 1987 |
| 1207 | Loutex Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 1208 | Lovelady, I. W. | Albuquerque, NM 87111 | Oil & Gas Operator | Jan 1996 |
| 1209 | Loveland Energy LLC | Wichita, KS 67206 | Oil Operator | Dec 2009 |
| 1210 | Loveless Properties | Burkburnett, TX 76354 | Oil & Gas Operator | Apr 2021 |
| 1211 | Lovell Keith | Stillwater, OK 74074-6459 | Oil & Gas Operator | Jan 2020 |
| 1212 | Loving Company (The) | Broken Arrow, OK 74014-0001 | Oil & Gas Operator | May 2013 |
| 1213 | Low D J | Littleton, CO 80127 | Oil Operator | Dec 1999 |
| 1214 | Low Gap L.L.C. | Cairo, WV 26337 | Gas Operator | Dec 2020 |
| 1215 | Low-End Oil LLC | Austin, TX 78748 | Oil Operator | Dec 2025 |
| 1216 | Lowe Kenneth | Jennings, OK 74038 | Oil & Gas Operator | Sep 2025 |
| 1217 | Lowe, Dean | Albany, TX 76430 | Oil Operator | Dec 2025 |
| 1218 | Lowe, Wallace W | | Oil Operator | Dec 2013 |
| 1219 | Lower 15 Oil Corporation | | Oil & Gas Operator | Oct 2025 |
| 1220 | Lower Colorado River Authority | Bastrop, TX 78602 | Oil & Gas Operator | Dec 2025 |
| 1221 | Lower Lafourche Corporation | | Oil & Gas Operator | Jan 1997 |
| 1222 | Lowery Roger | Duncan, OK 73534-0040 | Oil & Gas Operator | Sep 2012 |
| 1223 | Lowmar Exploration Co. | | Oil & Gas Operator | Feb 1990 |
| 1224 | Lowrance & Ray Exploration, Inc. | Fort Worth, TX 76147 | Oil & Gas Operator | Sep 2003 |
| 1225 | Lowrance Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2025 |
| 1226 | Lowrance, Darrell A. | Cut Bank, MT 59427 | Oil Operator | Aug 2007 |
| 1227 | Lowrance, Gene | Chico, TX 76431 | Oil & Gas Operator | Aug 2003 |
| 1228 | Lowry Exploratio | | Oil Operator | May 1994 |
| 1229 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2025 |
| 1230 | Lowry Oil & Gas LLC | Norwich, OH 43767 | Oil & Gas Operator | Dec 2024 |
| 1231 | Lowther, Dan M | Alum Bridge, WV 26321 | Oil & Gas Operator | Dec 2020 |
| 1232 | Loyd E. Simar | | Oil & Gas Operator | Aug 2001 |
| 1233 | Loyd, John H. | Warrensburg, MO 64903 | Oil Operator | Aug 2000 |
| 1234 | Lozano Oil Company Inc. | Houston, TX 77082 | Oil & Gas Operator | Dec 2025 |
| 1235 | LP Operating, LLC | Boerne, TX 78006 | Oil & Gas Operator | Dec 2025 |
| 1236 | LP Robinson Holdings, L.L.C. | Abilene, TX 79608 | Oil Operator | Dec 2025 |
| 1237 | Lpadams Consulting LLC | Guthrie, OK 73044-3543 | Oil Operator | Oct 2025 |
| 1238 | LPB Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 1239 | Lpes, Inc. | Provo, UT 84604 | Oil & Gas Operator | Nov 2018 |
| 1240 | LPR Energy, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2025 |
| 1241 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2025 |
| 1242 | LRC Development Corporation | Hays, KS 67601 | Oil Operator | Mar 2009 |
| 1243 | Lre Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2016 |
| 1244 | LRR IV Operating Inc | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 1245 | LRR Partnership | | Oil Operator | Sep 2023 |
| 1246 | LRR Pecos Valley, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 1247 | Lse Energy Co. | | Oil Operator | Mar 1989 |
| 1248 | Lse Energy Operating Co. Inc. | | Oil Operator | Jun 1996 |
| 1249 | LSM Ventures, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2020 |
| 1250 | LT Oil Co LLC | Pleasantville, PA 16341-0144 | Oil Operator | Dec 2024 |
| 1251 | LT Oil Company | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 1252 | LT Oil LLC | San Marcos, TX 78666 | Oil Operator | Dec 2025 |
| 1253 | LTJ Enterprises LLC | Lone Grove, OK 73443 | Oil & Gas Operator | May 2025 |
| 1254 | LTS Oil & Gas | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2025 |
| 1255 | LTS Oil & Gas A | Lubbock, TX 79424 | Oil & Gas Operator | Dec 2025 |
| 1256 | LTX Productions, Inc. | Houston, TX 77095 | Oil & Gas Operator | Jul 2008 |
| 1257 | Lu-Ray Petroleum LLC | Oklahoma City, OK 73121-1607 | Oil & Gas Operator | Nov 2025 |
| 1258 | Lubar Oil Co. | | Oil Operator | Nov 1983 |
| 1259 | Lubbock Energy, Inc. | Lubbock, TX 79453 | Oil & Gas Operator | Oct 1996 |
| 1260 | Lubell Oil Company | Tulsa, OK 74103 | Gas Operator | Jul 1993 |
| 1261 | Luca Operation, LLC | | Oil & Gas Operator | Feb 2016 |
| 1262 | Luca Resources Group, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 1263 | Lucas Energy, Inc. | Houston, TX 77067 | Oil & Gas Operator | Feb 2017 |
| 1264 | Lucas George C | | Oil Operator | Jul 2014 |
| 1265 | Lucas Well Service, Inc. | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 1266 | Luchshyn Harry E And Dannemiller William F | | Oil & Gas Operator | Dec 1994 |
| 1267 | Lucky Ace Petroleum LLC | Carrollton, TX 75010-4232 | Oil Operator | Oct 2021 |
| 1268 | Lucky Bird Too | Borger, TX 79008 | Oil & Gas Operator | Dec 2025 |
| 1269 | Lucky Crude, LLC | Erie, KS 66733 | Oil Operator | Sep 2025 |
| 1270 | Lucky Four Oil & Gas Company | Sasakwa, OK 74867 | Oil & Gas Operator | Oct 2025 |
| 1271 | Lucky Iron | | Oil Operator | Sep 2025 |
| 1272 | Lucky Lad Energy, LLC | Magnolia, TX 77353 | Oil & Gas Operator | Dec 2025 |
| 1273 | Lucky Oil & Gas | Malibu, CA 90265 | Oil & Gas Operator | Dec 2025 |
| 1274 | Lucky Oil Company | Comanche, OK 73529-0009 | Oil Operator | Jul 2025 |
| 1275 | Lucky Run, LLC | | Oil Operator | Dec 2019 |
| 1276 | Lucky Strike Production LLC | | Oil Operator | Dec 2024 |
| 1277 | Luconda Oil | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 1278 | Lucre Oil Company | Muskogee, OK 74401-5099 | Oil & Gas Operator | Jun 2019 |
| 1279 | Lucros International Corporation | Van Buren, AR 72956 | Oil & Gas Operator | Dec 2025 |
| 1280 | Ludco Inc | Caledonia, OH 43314 | Oil & Gas Operator | Dec 1986 |
| 1281 | Ludco Incorporat | | Gas Operator | Mar 1990 |
| 1282 | Ludlow Oil & Gas Company LLC | New Matamoras, OH 45767-5058 | Oil & Gas Operator | Dec 2024 |
| 1283 | Ludwig Cleo R | Caledonia, OH 43314 | Oil & Gas Operator | Dec 1987 |
| 1284 | Luff Exploration | Denver, CO 80203 | Oil & Gas Operator | Dec 2006 |
| 1285 | Luff Exploration Company | Denver, CO 80203 | Oil & Gas Operator | Nov 2025 |
| 1286 | Luffey Gas Corp. | | Gas Operator | Dec 2008 |
| 1287 | Luffey Gas Corp.-Graff | | Gas Operator | Oct 1994 |
| 1288 | Luffey-Stinson Gas Corporation | | Gas Operator | Sep 2018 |
| 1289 | Lufkin Production Company Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Dec 2025 |
| 1290 | Luke Oil Company | Bristow, OK 74010 | Oil & Gas Operator | Nov 2025 |
| 1291 | Luke, D.L. Oil Co. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2025 |
| 1292 | Luke, W. J. | Muenster, TX 76252 | Oil & Gas Operator | Mar 2013 |
| 1293 | Luling O&G LLC | Cibolo, TX 78108 | Oil & Gas Operator | Dec 2025 |
| 1294 | Luling Oil & Gas Co Inc | San Antonio, TX 78209 | Oil Operator | Dec 1986 |
| 1295 | Luling Well Service | Luling, TX 78648 | Oil & Gas Operator | Dec 2025 |
| 1296 | Luloc Oil Co. | Lockhart, TX 78644 | Oil & Gas Operator | Aug 2003 |
| 1297 | Lulu & Thomas Kavouras | Apollo, PA 15613-1108 | Oil & Gas Operator | Dec 2023 |
| 1298 | Lumbley, W. F. | Hobbs, NM 88242 | Oil & Gas Operator | Jan 2008 |
| 1299 | Lunar Investments Inc | Oklahoma City, OK 73118-4823 | Oil & Gas Operator | Oct 2025 |
| 1300 | Lunar Oil Company | Midland, TX 79708 | Oil & Gas Operator | Feb 1999 |