| 18001 | Los Angeles Unified School District | | Oil Operator | Dec 2014 |
| 18002 | Los Hijos De Sanchez J LLC | Beeville, TX 78102 | Oil Operator | Feb 2026 |
| 18003 | Losure Pet. Co. | Borger, TX 79008 | Oil & Gas Operator | Apr 2014 |
| 18004 | Losure, Ken | Borger, TX 79008 | Oil & Gas Operator | Feb 2026 |
| 18005 | Lotex Exploration & Prod. Co. | Carrollton, TX 75006 | Oil & Gas Operator | Jul 2011 |
| 18006 | Lothes John W | Newark, OH 43055 | Oil & Gas Operator | Dec 2024 |
| 18007 | Lothian Oil Texas I, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Mar 2008 |
| 18008 | Loto Energy LLC | Saint Louis, MO 63105 | Oil & Gas Operator | Dec 2025 |
| 18009 | Lott Production Company | San Antonio, TX 78217 | Oil & Gas Operator | Feb 2026 |
| 18010 | Lotter Gas Co., Inc. | | Gas Operator | Apr 2009 |
| 18011 | Lottie Oil Co. | Seguin, TX 78156 | Oil & Gas Operator | Apr 1996 |
| 18012 | Lotus O&G, LLC | Mansfield, TX 76063 | Oil Operator | Feb 2026 |
| 18013 | Lotus Operating Company, L.L.C. | Wichita, KS 67204 | Oil & Gas Operator | Sep 2025 |
| 18014 | Lou Dennis Oil Company Inc | Ada, OK 74820-2303 | Oil & Gas Operator | Jun 2016 |
| 18015 | Lou-Tex Oil & Gas Co. | | Oil & Gas Operator | Jun 1987 |
| 18016 | Loudel, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Feb 2026 |
| 18017 | Louden Clarence E Jr | Kittanning, PA 16201-1121 | Gas Operator | Dec 1994 |
| 18018 | Loudon Exploration, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2008 |
| 18019 | Loudon Operating Company, L.L.C. | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 18020 | Louis Dreyfus Natural Gas Corp. | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2015 |
| 18021 | Louis Dreyfus Natural Gas Inc | Houston, TX 770103088 | Oil & Gas Operator | Sep 1997 |
| 18022 | Louis J. Roussel | | Oil & Gas Operator | Sep 1991 |
| 18023 | Louisiana Crude Oil&Gas Co Inc | | Oil & Gas Operator | Mar 1984 |
| 18024 | Louisiana Delta Oil Co, LLC | | Oil & Gas Operator | Nov 2024 |
| 18025 | Louisiana Energy & Environmental, Inc. | | Oil & Gas Operator | Aug 2015 |
| 18026 | Louisiana Energy Consultant Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 18027 | Louisiana Energy Consultants, Inc. | | Oil & Gas Operator | Dec 2024 |
| 18028 | Louisiana Energy Corp. | | Gas Operator | Dec 1987 |
| 18029 | Louisiana Energy Investors, L.L.C. | | Oil & Gas Operator | Jun 2016 |
| 18030 | Louisiana Fuel Oil Corporation | | Oil Operator | Aug 1997 |
| 18031 | Louisiana Gas Development Corp | | Oil & Gas Operator | Jan 2025 |
| 18032 | Louisiana Gas Production Co | | Gas Operator | Dec 1996 |
| 18033 | Louisiana Gas Service Co. | | Oil Operator | May 2004 |
| 18034 | Louisiana Gas System, Inc. | | Oil Operator | Apr 2004 |
| 18035 | Louisiana General Petr. Corp. | | Oil & Gas Operator | Mar 1980 |
| 18036 | Louisiana Intrastate Gas Corp. | | Oil Operator | Feb 1994 |
| 18037 | Louisiana Jordan Oil Co, Inc. | Lake Charles, LA 70602 | Oil & Gas Operator | Dec 2024 |
| 18038 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 18039 | Louisiana Leasing & Expl, Inc. | | Oil & Gas Operator | Apr 2011 |
| 18040 | Louisiana Minerals, LTD. | Houston, TX 77024 | Oil & Gas Operator | Jul 1988 |
| 18041 | Louisiana Offshore Exploration, L.L.C. | | Oil & Gas Operator | Dec 2024 |
| 18042 | Louisiana Operating Co., Inc. | | Oil & Gas Operator | Aug 1994 |
| 18043 | Louisiana Resources Co | | Oil Operator | May 1992 |
| 18044 | Louisiana Tank, Inc. | | Oil Operator | Mar 2023 |
| 18045 | Louisiana-Caddo Invest, Inc. | | Oil & Gas Operator | Jun 2008 |
| 18046 | Louisiana-Hunt Petroleum Corp. | | Oil & Gas Operator | Dec 1985 |
| 18047 | Louisville Gas & Electric Co | Louisville, KY 40241 | Oil Operator | Dec 2023 |
| 18048 | Loundagin N B | Casper, WY 82602 | Oil & Gas Operator | Sep 2015 |
| 18049 | Loutex Energy, Inc. | | Oil & Gas Operator | Nov 1987 |
| 18050 | Loutex Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 18051 | Lovelady, I. W. | Albuquerque, NM 87111 | Oil & Gas Operator | Jan 1996 |
| 18052 | Loveland Energy LLC | Wichita, KS 67206 | Oil Operator | Dec 2009 |
| 18053 | Loveless Properties | Burkburnett, TX 76354 | Oil & Gas Operator | Apr 2021 |
| 18054 | Lovell Keith | Stillwater, OK 74074-6459 | Oil & Gas Operator | Jan 2020 |
| 18055 | Loving Company (The) | Broken Arrow, OK 74014-0001 | Oil & Gas Operator | May 2013 |
| 18056 | Low D J | Littleton, CO 80127 | Oil Operator | Dec 1999 |
| 18057 | Low Gap L.L.C. | Cairo, WV 26337 | Gas Operator | Dec 2020 |
| 18058 | Low-End Oil LLC | Austin, TX 78748 | Oil Operator | Feb 2026 |
| 18059 | Lowe Kenneth | Jennings, OK 74038 | Oil & Gas Operator | Sep 2025 |
| 18060 | Lowe, Dean | Albany, TX 76430 | Oil Operator | Feb 2026 |
| 18061 | Lowe, Hugh | Albany, TX 76430 | Oil & Gas Operator | Jul 2003 |
| 18062 | Lowe, Wallace W | | Oil Operator | Dec 2013 |
| 18063 | Lower 15 Oil Corporation | | Oil & Gas Operator | Oct 2025 |
| 18064 | Lower Colorado River Authority | Bastrop, TX 78602 | Oil & Gas Operator | Feb 2026 |
| 18065 | Lower Lafourche Corporation | | Oil & Gas Operator | Jan 1997 |
| 18066 | Lowery Roger | Duncan, OK 73534-0040 | Oil & Gas Operator | Sep 2012 |
| 18067 | Lowmar Exploration Co. | | Oil & Gas Operator | Feb 1990 |
| 18068 | Lowrance & Ray Exploration, Inc. | Fort Worth, TX 76147 | Oil & Gas Operator | Sep 2003 |
| 18069 | Lowrance Inc. | Eastland, TX 76448 | Oil & Gas Operator | Feb 2026 |
| 18070 | Lowrance, Darrell A. | Cut Bank, MT 59427 | Oil Operator | Aug 2007 |
| 18071 | Lowrance, Gene | Chico, TX 76431 | Oil & Gas Operator | Aug 2003 |
| 18072 | Lowry Exploratio | | Oil Operator | May 1994 |
| 18073 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2025 |
| 18074 | Lowry Oil & Gas LLC | Norwich, OH 43767 | Oil & Gas Operator | Dec 2024 |
| 18075 | Lowther, Dan M | Alum Bridge, WV 26321 | Oil & Gas Operator | Dec 2020 |
| 18076 | Loyd E. Simar | | Oil & Gas Operator | Aug 2001 |
| 18077 | Loyd, John H. | Warrensburg, MO 64903 | Oil Operator | Aug 2000 |
| 18078 | Lozano Oil Company Inc. | Houston, TX 77082 | Oil & Gas Operator | Feb 2026 |
| 18079 | LP Operating, LLC | Boerne, TX 78006 | Oil & Gas Operator | Feb 2026 |
| 18080 | LP Robinson Holdings, L.L.C. | Abilene, TX 79608 | Oil Operator | Feb 2026 |
| 18081 | LPB Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 18082 | Lpes, Inc. | Provo, UT 84604 | Oil & Gas Operator | Nov 2018 |
| 18083 | LPR Energy, LLC | Dallas, TX 75219 | Oil & Gas Operator | Feb 2026 |
| 18084 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2025 |
| 18085 | LRC Development Corporation | Hays, KS 67601 | Oil Operator | Mar 2009 |
| 18086 | Lre Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2016 |
| 18087 | LRR IV Operating Inc | Houston, TX 77002 | Oil & Gas Operator | Nov 2025 |
| 18088 | LRR Partnership | | Oil Operator | Sep 2023 |
| 18089 | LRR Pecos Valley, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 18090 | Lse Energy Co. | | Oil Operator | Mar 1989 |
| 18091 | Lse Energy Operating Co. Inc. | | Oil Operator | Jun 1996 |
| 18092 | LSM Ventures, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Nov 2020 |
| 18093 | LT Oil Co LLC | Pleasantville, PA 16341-0144 | Oil Operator | Dec 2025 |
| 18094 | LT Oil Company | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 18095 | LT Oil LLC | San Marcos, TX 78666 | Oil Operator | Feb 2026 |
| 18096 | LTJ Enterprises LLC | Lone Grove, OK 73443 | Oil & Gas Operator | May 2025 |
| 18097 | LTS Oil & Gas | Lubbock, TX 79424 | Oil & Gas Operator | Feb 2026 |
| 18098 | LTS Oil & Gas A | Lubbock, TX 79424 | Oil & Gas Operator | Feb 2026 |
| 18099 | LTX Productions, Inc. | Houston, TX 77095 | Oil & Gas Operator | Jul 2008 |
| 18100 | Lu-Ray Petroleum LLC | Oklahoma City, OK 73121-1607 | Oil & Gas Operator | Dec 2025 |