| 17301 | Lomax Exploration Company | Roosevelt, UT 84066 | Oil & Gas Operator | Jun 1995 |
| 17302 | Lomax Operating Company, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Jun 2011 |
| 17303 | London Petroleum Corporation | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 17304 | London William W | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2015 |
| 17305 | London William W Inc | Oklahoma City, OK 73116-5116 | Oil & Gas Operator | Apr 2016 |
| 17306 | Lone Eagle LLC | | Oil & Gas Operator | Dec 2003 |
| 17307 | Lone Jack Oil Co. | | Oil Operator | Jun 2025 |
| 17308 | Lone Mountain Prod | | Oil Operator | Dec 2018 |
| 17309 | Lone Mountain Production Company | | Oil & Gas Operator | Jan 2016 |
| 17310 | Lone MTN Production Co | Billings, MT 59108-0965 | Oil & Gas Operator | Jul 2019 |
| 17311 | Lone Oak Energy Inc | Kyle, TX 78640 | Oil & Gas Operator | Oct 2025 |
| 17312 | Lone Pine Operating Company, Inc. | Salem, WV 26426 | Oil & Gas Operator | Dec 2021 |
| 17313 | Lone Pine Production Assoc.,Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 1993 |
| 17314 | Lone Star Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 17315 | Lone Star Interests, Inc. | Chanute, KS 66720 | Oil Operator | Sep 2001 |
| 17316 | Lone Star Land And Energy II LLC | Dallas, TX 75214 | Oil & Gas Operator | Jan 2020 |
| 17317 | Lone Star Oil & Gas | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 17318 | Lone Star Oil & Gas, Inc | Greenville, KY 42345 | Oil & Gas Operator | Dec 2023 |
| 17319 | Lone Star Oil Co. | Jacksboro, TX 76458 | Oil & Gas Operator | Jun 2025 |
| 17320 | Lone Star Operating Company | Pearsall, TX 78061 | Oil & Gas Operator | Oct 2025 |
| 17321 | Lone Star Operations LLC | Lubbock, TX 79401 | Oil & Gas Operator | Oct 2025 |
| 17322 | Lone Star Pipeline Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 17323 | Lone Star Production | Lawn, TX 79530 | Oil & Gas Operator | Oct 2025 |
| 17324 | Lone Star Resources Company | Keyes, OK 73947 | Oil & Gas Operator | Mar 2015 |
| 17325 | Lone Star Services | Pecos, TX 79772 | Oil & Gas Operator | Oct 2025 |
| 17326 | Lone Tree Oil & Gas LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Oct 2025 |
| 17327 | Lone Wolf Oil & Gas Co., LLC | Moline, KS 67353 | Oil & Gas Operator | Jun 2025 |
| 17328 | Lone Wolf Oil LLC | Wellsville, KS 66092 | Oil Operator | Dec 2009 |
| 17329 | Lone Wolf Operating Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2005 |
| 17330 | Lone Wolf Operating Company, LP | Haxtun, CO 80731 | Oil & Gas Operator | Sep 2009 |
| 17331 | Lone Wolf Operating, LLC | Billings, MT 59108 | Oil & Gas Operator | May 2025 |
| 17332 | Lonesome B, LLC | Monahans, TX 79756 | Oil & Gas Operator | Oct 2025 |
| 17333 | Lonestar Foundation Inc. | | Oil Operator | Dec 2008 |
| 17334 | Lonestar Operating, LLC | Houston, TX 77084 | Oil & Gas Operator | Nov 2022 |
| 17335 | Lonestar Petroleum Services, LLC | Artesia, NM 88210 | Oil Operator | Jul 2025 |
| 17336 | Lonestar Production Services | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 17337 | Long Acres Prod. Co., Inc. | | Oil & Gas Operator | Aug 1986 |
| 17338 | Long And Ware Oil, A General Partnership | Pawhuska, OK 74056 | Oil Operator | Jan 2021 |
| 17339 | Long Beach Oil Development Co | Glendale, CA 91203 | Oil & Gas Operator | Jun 2004 |
| 17340 | Long Bros. Oil Co. | | Oil Operator | Jul 2015 |
| 17341 | Long Drilling Company, LLC | Hamilton, KS 66853 | Oil Operator | Jun 2025 |
| 17342 | Long Engineering Company Inc | Oklahoma City, OK 73112-7769 | Oil Operator | Jun 2008 |
| 17343 | Long George L | San Antonio, TX 78209 | Oil & Gas Operator | Feb 1996 |
| 17344 | Long Jack Senior | | Oil Operator | Jan 2004 |
| 17345 | Long Oil & Natural Gas Corp. | | Oil & Gas Operator | Feb 1996 |
| 17346 | Long Oil And Gas Expl., LTD | | Oil & Gas Operator | Apr 1988 |
| 17347 | Long Operating, L.L.C. | Shreveport, LA 71166 | Oil & Gas Operator | Jun 2006 |
| 17348 | Long Petroleum, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Jun 2020 |
| 17349 | Long Production LLC | Claremore, OK 74017-2808 | Oil & Gas Operator | Oct 2019 |
| 17350 | Long Resources Inc | Austin, TX 78730 | Oil & Gas Operator | Jul 2025 |
| 17351 | Long Royalty Company | Yukon, OK 73085 | Oil & Gas Operator | Jan 2004 |
| 17352 | Long Shot Oil Co. | | Oil Operator | Aug 1997 |
| 17353 | Long Trust The | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2008 |
| 17354 | Long Trusts, The | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 17355 | Long, Edgar E. | Windthorst, TX 76389 | Oil & Gas Operator | Oct 2011 |
| 17356 | Long, Edwin A. And Glenda | Hamilton, KS 66853 | Oil Operator | Aug 2000 |
| 17357 | Long, James A | | Oil Operator | Aug 2000 |
| 17358 | Long, John P | | Oil & Gas Operator | Jun 2025 |
| 17359 | Long, Larry T. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2017 |
| 17360 | Long, Lewis C., A General Partnership | Hamilton, KS 66853 | Oil Operator | Dec 2019 |
| 17361 | Long, Marshall | Chase, KS 67524 | Oil Operator | Mar 1986 |
| 17362 | Long-Tex Exploration, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Oct 2025 |
| 17363 | Longacre Oil & Gas | Enid, OK 73702 | Oil & Gas Operator | Mar 2013 |
| 17364 | Longberry Energy Inc | Keota, OK 74941 | Gas Operator | Jun 2025 |
| 17365 | Longbotham Energy, LLC | Jackson, TN 38308 | Oil Operator | Oct 2025 |
| 17366 | Longbow LLC | | Oil & Gas Operator | Jul 2025 |
| 17367 | Longbranch Oil Company | Oklahoma City, OK 73154-0735 | Oil & Gas Operator | Mar 2018 |
| 17368 | Longfellow Energy, LP | Dallas, TX 75225 | Oil & Gas Operator | Oct 2025 |
| 17369 | Longhorn Crude, LLC | Jetmore, KS 67854 | Oil Operator | Jun 2025 |
| 17370 | Longhorn Energy | | Oil & Gas Operator | Jun 1991 |
| 17371 | Longhorn Estates & Cattle Co. LLC | Jennings, OK 74038 | Oil Operator | Jun 2025 |
| 17372 | Longhorn Oil & Gas | | Oil Operator | Jun 2025 |
| 17373 | Longhorn Oil & Gas Company | | Oil & Gas Operator | Sep 1982 |
| 17374 | Longhorn Oil Properties, Inc. | Pottsboro, TX 75076 | Oil & Gas Operator | Oct 2025 |
| 17375 | Longhorn Propert | | Oil Operator | Feb 1989 |
| 17376 | Longhorn Service & Drilling Co. | Kermit, TX 79745 | Oil & Gas Operator | Jun 2019 |
| 17377 | Longhurst Oil & Gas Inc | | Oil & Gas Operator | Nov 2013 |
| 17378 | Longleaf Energy Group, Inc. | Brewton, AL 36426 | Oil & Gas Operator | Feb 2004 |
| 17379 | Longleaf Gas & Oil | | Oil Operator | May 2010 |
| 17380 | Longs Peak Resources LLC | Houston, TX 77019 | Oil & Gas Operator | Aug 2025 |
| 17381 | Longshot Energy LLC | League City, TX 77573 | Oil Operator | Oct 2025 |
| 17382 | Longton Explorat | | Oil & Gas Operator | Jul 1993 |
| 17383 | Longton Explorations | | Oil & Gas Operator | Dec 2024 |
| 17384 | Longview Production Company | Dallas, TX 75243-3795 | Oil & Gas Operator | May 2025 |
| 17385 | Longview Production, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2002 |
| 17386 | Longville Production Co., Inc. | | Oil & Gas Operator | Sep 1995 |
| 17387 | Lonny Bruce Operations, L.L.C. | McPherson, KS 67460 | Oil & Gas Operator | Apr 2009 |
| 17388 | Lor-Rob Associates, LLC | East Bethany, NY 14054 | Gas Operator | Dec 2024 |
| 17389 | Lorac, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Oct 2025 |
| 17390 | Loral Operating LLC | Sheridan, WY 82801 | Gas Operator | Apr 2011 |
| 17391 | Lord Enterprises Inc | Oklahoma City, OK 73106-5050 | Oil & Gas Operator | Sep 2000 |
| 17392 | Lorentz Oil & Gas LLC | Edmond, OK 73034-7266 | Oil & Gas Operator | Jun 2025 |
| 17393 | Lorenz & Bosanko | San Antonio, TX 78247 | Oil & Gas Operator | Oct 2025 |
| 17394 | Lorenz Robert M | | Oil & Gas Operator | Oct 1984 |
| 17395 | Lorenz, Barton T. | Cherryvale, KS 67335 | Oil & Gas Operator | Jul 2013 |
| 17396 | Lorenz, J. P., Jr. | La Vernia, TX 78121 | Oil & Gas Operator | Mar 2008 |
| 17397 | Lorenz, James D. | Parsons, KS 67357 | Oil & Gas Operator | May 2014 |
| 17398 | Lorenzen Oil Company, Inc. | O?Fallon, MO 63368 | Oil Operator | Apr 2025 |
| 17399 | Loretto, Jason C. | Alden, NY 14004 | Gas Operator | Dec 2024 |
| 17400 | Lorlan Oil Company | Wink, TX 79789 | Oil & Gas Operator | Aug 2020 |