| 16101 | Lancaster, Randy L. Dba Heritage Oil & Gas | Middlebourne, WV 26149 | Oil & Gas Operator | Dec 2021 |
| 16102 | Lance Exploration Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1994 |
| 16103 | Lance Gas & Oil Productions | | Oil & Gas Operator | Jan 2025 |
| 16104 | Lance Leasing | Odessa, TX 79765 | Oil Operator | Jul 2026 |
| 16105 | Lance Oil & Gas Company Inc | Kirtland, NM 87417 | Oil & Gas Operator | Mar 2013 |
| 16106 | Lance Oil & Gas Productions | Bloomburg, TX 75556 | Oil & Gas Operator | Jul 2026 |
| 16107 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Apr 2026 |
| 16108 | Lancer Energy Corporation | Oklahoma City, OK 73132-5903 | Oil & Gas Operator | May 2015 |
| 16109 | Lancer Oil, Inc. | Piqua, KS 66761 | Oil Operator | May 2005 |
| 16110 | Lancer Petroleum Corporation | Irving, TX 75014 | Oil & Gas Operator | Feb 2014 |
| 16111 | Lancer Resources Company | | Oil & Gas Operator | Jan 1998 |
| 16112 | Lanco Oil & Gas, Inc. | Richland, TX 76681 | Oil & Gas Operator | Jan 1998 |
| 16113 | Land & Natural Res. Dev., Inc. | | Oil & Gas Operator | Apr 2007 |
| 16114 | Land And Natural Resource Development, Inc. | Northport, AL 35473 | Oil & Gas Operator | Feb 2026 |
| 16115 | Land, Cleatus H. Estate | Seguin, TX 78155 | Oil & Gas Operator | Mar 2001 |
| 16116 | Landaplenty, LLC | Glenville, WV 26351 | Oil & Gas Operator | Dec 2021 |
| 16117 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 16118 | Landers & Musgrove Oil Co. Inc | Okemah, OK 74859-0266 | Oil & Gas Operator | Jan 2018 |
| 16119 | Landers & Waldman Inc | Okemah, OK 74859-0660 | Oil & Gas Operator | May 2013 |
| 16120 | Landers Oil & Gas Inc | Tulsa, OK 74132-2171 | Oil & Gas Operator | Mar 2026 |
| 16121 | Landers Production Company | Granite, OK 73547-0093 | Oil Operator | Apr 2014 |
| 16122 | Landes Explorati | | Oil Operator | Apr 1995 |
| 16123 | Landes, P. Todd, Jr. | Magnolia, AR 71753 | Oil Operator | Apr 1988 |
| 16124 | Landis, Andrew J. And Athanasia | Fredonia, NY 14063 | Gas Operator | Dec 2025 |
| 16125 | Landmark 4 LLC | Dalton, OH 44618-1111 | Oil & Gas Operator | Dec 2025 |
| 16126 | Landmark Drilling, L.L.C. | Waskom, TX 75692 | Oil Operator | Jul 2026 |
| 16127 | Landmark Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | Apr 2026 |
| 16128 | Landmark Energy Partners, LLC | Edmond, OK 73013 | Oil Operator | Apr 2026 |
| 16129 | Landmark Exploration Co | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2013 |
| 16130 | Landmark Exploration Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Jul 2026 |
| 16131 | Landmark Ip, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2026 |
| 16132 | Landmark Oil & G | | Oil Operator | Nov 1987 |
| 16133 | Landmark Oil Exp | | Oil Operator | Sep 1994 |
| 16134 | Landmark Operating Company | Welty, OK 74833-3923 | Oil Operator | Aug 2015 |
| 16135 | Landmark Production Company | MC Gregor, TX 76657 | Oil & Gas Operator | Oct 2010 |
| 16136 | Landmark Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 16137 | Landmark Venture Group No. 1, Inc. | | Oil & Gas Operator | Jan 2025 |
| 16138 | Landmark Venture Group, Inc. | | Oil Operator | Dec 2008 |
| 16139 | Landmaster Partners, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jul 2026 |
| 16140 | Landmen Of Texas | Hondo, TX 78861 | Oil Operator | Feb 2007 |
| 16141 | Landmen Of Texas, Inc. | Hondo, TX 78861 | Oil Operator | Dec 2016 |
| 16142 | Landor Oil Co. | San Marcos, TX 78666 | Oil Operator | Jul 2026 |
| 16143 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 16144 | Landprovest Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1993 |
| 16145 | Landreth, Robert E. | Midland, TX 79701 | Oil & Gas Operator | Jul 2026 |
| 16146 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Jul 2026 |
| 16147 | Landrum Petroleum Co., Inc. | Burkburnett, TX 76354 | Oil Operator | Mar 2008 |
| 16148 | Landrum West, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 1997 |
| 16149 | Landrum, W. A. | Byers, TX 76357 | Oil & Gas Operator | Apr 2002 |
| 16150 | Lane Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Jul 2026 |
| 16151 | Lane, Lloyd L. | Buffalo, TX 75831 | Oil Operator | Jul 2026 |
| 16152 | Laneer Resources Company | Abilene, TX 79608 | Oil & Gas Operator | Jul 2026 |
| 16153 | Lanexco, Inc. | Sealy, TX 77474 | Oil & Gas Operator | Jul 2026 |
| 16154 | Lanford Drilling Co., Inc. | | Oil Operator | Jun 1996 |
| 16155 | Lang Larry D | Beverly, OH 45715 | Oil & Gas Operator | Dec 2025 |
| 16156 | Lang, Herman - Marital Trust | Garden City, KS 67846 | Oil & Gas Operator | Feb 2026 |
| 16157 | Lang, Kenneth R. | Garden City, KS 67846 | Oil & Gas Operator | Feb 2026 |
| 16158 | Langasco Energy Corp | Alliance, OH 44601 | Oil & Gas Operator | Dec 1987 |
| 16159 | Langford & Brigham Operating LLC | Austin, TX 78730 | Oil & Gas Operator | Jul 2026 |
| 16160 | Langford Production Company, LLC | Haskell, TX 79521 | Oil & Gas Operator | Jul 2026 |
| 16161 | Langford, G. E. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2002 |
| 16162 | Langford, R. C. Operating Co. | Rule, TX 79547 | Oil & Gas Operator | Mar 1994 |
| 16163 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 16164 | Langley Energy | Euless, TX 76040 | Gas Operator | Jan 2016 |
| 16165 | Langley Harold | Graham, OK 73437 | Oil Operator | Mar 2026 |
| 16166 | Langley, James Operating Company, Inc | Smackover, AR 71762 | Oil & Gas Operator | Jan 2025 |
| 16167 | Langley, Jerry Oil Company LLC | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 16168 | Langston Oil & Gas LLC | Wichita, KS 67202 | Oil Operator | Nov 2025 |
| 16169 | Lankford & Nance | | Gas Operator | Dec 2010 |
| 16170 | Lankford Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1999 |
| 16171 | Lankford, Dan L. | Graham, TX 76450 | Oil & Gas Operator | Jul 2026 |
| 16172 | Lanmarc Resources | | Oil Operator | Dec 2003 |
| 16173 | Lanoco, Inc. | | Oil & Gas Operator | Sep 2002 |
| 16174 | Lansden Operating Co LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 1997 |
| 16175 | Lansing Energy C | | Oil Operator | Jun 2006 |
| 16176 | Lansing Energy Operations | Wichita, KS 67202 | Oil Operator | Apr 2010 |
| 16177 | Lap Energy Solutions LLC | Harper, TX 78631 | Oil Operator | Jul 2026 |
| 16178 | Lapco Oil & Gas Company | Houston, TX 77069 | Oil & Gas Operator | Oct 2015 |
| 16179 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Aug 2024 |
| 16180 | Lapis Operating, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jul 2015 |
| 16181 | Lappin Oil LLC | Douglas, WY 82633 | Oil & Gas Operator | May 2026 |
| 16182 | Laquey, E. C. | Refugio, TX 78377 | Oil & Gas Operator | Aug 2003 |
| 16183 | Lar-Mie Petroleum Inc | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1998 |
| 16184 | Larae Operations | Corpus Christ, TX 78413 | Oil Operator | Jul 2026 |
| 16185 | Laran Operating LLC | Dover, OK 73734-0057 | Oil & Gas Operator | Mar 2015 |
| 16186 | Larance Engineering Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Jan 1996 |
| 16187 | Larch Oil & Gas Corporation | Cross Lanes, WV 25313 | Oil & Gas Operator | Dec 2021 |
| 16188 | Larco Drilling & Exploration Corp. | | Oil & Gas Operator | Dec 1999 |
| 16189 | Larcom Mike | | Oil Operator | Feb 1987 |
| 16190 | Lardo, Anthony P. Jr. | Lakeview, NY 14085 | Gas Operator | Dec 2025 |
| 16191 | Laredo Energy | Houston, TX 77002 | Oil & Gas Operator | Jun 2016 |
| 16192 | Laredo Energy Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2022 |
| 16193 | Laredo Energy V, LP | Houston, TX 77024 | Oil & Gas Operator | Apr 2014 |
| 16194 | Laredo Energy, LP | Houston, TX 77040 | Oil & Gas Operator | Oct 2003 |
| 16195 | Laredo Petroleum - Dallas, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2014 |
| 16196 | Laredo Petroleum, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2023 |
| 16197 | Large Operating LLC | Stinnett, TX 79083 | Oil & Gas Operator | Jul 2026 |
| 16198 | Largo Oil Company | Longview, TX 75606 | Oil & Gas Operator | Jul 2026 |
| 16199 | Lariat Energy & Supply Co Inc | Hulbert, OK 74441 | Oil & Gas Operator | Feb 2026 |
| 16200 | Lariat Land & Exploration, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jul 2026 |