| 16101 | Lamar Matlock | | Oil Operator | Jan 2025 |
| 16102 | Lamar Oil & Gas Co., Inc. | | Oil & Gas Operator | Dec 2021 |
| 16103 | Lamar Oil & Gas Exploration | | Gas Operator | Oct 2013 |
| 16104 | Lamar Oil & Gas, Inc. | Corpus Christ, TX 78413 | Oil & Gas Operator | May 2026 |
| 16105 | Lamar Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Oct 2015 |
| 16106 | Lamar Smith | | Oil Operator | Aug 1991 |
| 16107 | Lamarsa Corp. | Cut Bank, MT 59427 | Oil & Gas Operator | Mar 2026 |
| 16108 | Lamay Corporation | Rosenberg, TX 77471 | Oil & Gas Operator | May 2026 |
| 16109 | Lamb & Mize | Azle, TX 76020 | Oil & Gas Operator | May 2026 |
| 16110 | Lamb Alan L | Oklahoma City, OK 73120-7824 | Oil & Gas Operator | Feb 2020 |
| 16111 | Lamb, James L., Jr. | Austin, TX 78750 | Oil & Gas Operator | Mar 2016 |
| 16112 | Lambda Energy Resources LLC | | Oil & Gas Operator | Mar 2026 |
| 16113 | Lambdin William H | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 1998 |
| 16114 | Lambeck Petroleum, LLC | Stockdale, TX 78160 | Oil Operator | May 2026 |
| 16115 | Lamberd, Clayton | Olathe, KS 66061 | Oil Operator | Oct 2025 |
| 16116 | Lambert Company LLC | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2026 |
| 16117 | Lambert Company The | Healdton, OK 73438-0962 | Oil & Gas Operator | Feb 2023 |
| 16118 | Lambert Oil & Gas LLC | Holdenville, OK 74848 | Oil & Gas Operator | Mar 2026 |
| 16119 | Lamberton Oil Co Inc | Tulsa, OK 74107 | Oil & Gas Operator | May 2013 |
| 16120 | Lamberton W J | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2015 |
| 16121 | Lamco Oil, LLC | Nocona, TX 76255 | Oil & Gas Operator | May 2026 |
| 16122 | Lamima Corporation | Ardmore, OK 73401 | Oil Operator | Nov 1994 |
| 16123 | Lamkin Oil Company | Stephens, AR 71764 | Oil Operator | Jan 2025 |
| 16124 | Laml Compaines LLC | Cleveland, OK 74020 | Oil Operator | Mar 2026 |
| 16125 | Lammerts Robert P | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2002 |
| 16126 | Lampert Exploration Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 16127 | Lamson Petroleum Corporation | | Oil & Gas Operator | Mar 1993 |
| 16128 | Lamson/Crocker Petroleum Corp. | | Oil & Gas Operator | May 1988 |
| 16129 | Lamson/Onshore Petroleum Corp. | | Oil & Gas Operator | Sep 1985 |
| 16130 | Lan Ma'S Oil And Gas LLC | Sugar Land, TX 77479 | Oil Operator | Dec 2025 |
| 16131 | Lancaster, Randy L. Dba Heritage Oil & Gas | Middlebourne, WV 26149 | Oil & Gas Operator | Dec 2021 |
| 16132 | Lance Gas & Oil Productions | | Oil & Gas Operator | Jan 2025 |
| 16133 | Lance Leasing | Odessa, TX 79765 | Oil Operator | May 2026 |
| 16134 | Lance Oil & Gas Company Inc | Kirtland, NM 87417 | Oil & Gas Operator | Mar 2013 |
| 16135 | Lance Oil & Gas Productions | Bloomburg, TX 75556 | Oil & Gas Operator | May 2026 |
| 16136 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Mar 2026 |
| 16137 | Lancer Energy Corporation | Oklahoma City, OK 73132-5903 | Oil & Gas Operator | May 2015 |
| 16138 | Lancer Oil, Inc. | Piqua, KS 66761 | Oil Operator | May 2005 |
| 16139 | Lancer Petroleum Corporation | Irving, TX 75014 | Oil & Gas Operator | Feb 2014 |
| 16140 | Lancer Resources Company | | Oil & Gas Operator | Jan 1998 |
| 16141 | Lanco Oil & Gas, Inc. | Richland, TX 76681 | Oil & Gas Operator | Jan 1998 |
| 16142 | Land & Natural Res. Dev., Inc. | | Oil & Gas Operator | Apr 2007 |
| 16143 | Land And Natural Resource Development, Inc. | Northport, AL 35473 | Oil & Gas Operator | Feb 2026 |
| 16144 | Land, Cleatus H. Estate | Seguin, TX 78155 | Oil & Gas Operator | Mar 2001 |
| 16145 | Landaplenty, LLC | Glenville, WV 26351 | Oil & Gas Operator | Dec 2021 |
| 16146 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 16147 | Landers & Musgrove Oil Co. Inc | Okemah, OK 74859-0266 | Oil & Gas Operator | Jan 2018 |
| 16148 | Landers & Waldman Inc | Okemah, OK 74859-0660 | Oil & Gas Operator | May 2013 |
| 16149 | Landers Oil & Gas Inc | Tulsa, OK 74132-2171 | Oil & Gas Operator | Feb 2026 |
| 16150 | Landers Production Company | Granite, OK 73547-0093 | Oil Operator | Apr 2014 |
| 16151 | Landes Explorati | | Oil Operator | Apr 1995 |
| 16152 | Landes, P. Todd, Jr. | Magnolia, AR 71753 | Oil Operator | Apr 1988 |
| 16153 | Landis, Andrew J. And Athanasia | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 16154 | Landmark 4 LLC | Dalton, OH 44618-1111 | Oil & Gas Operator | Dec 2024 |
| 16155 | Landmark Drilling, L.L.C. | Waskom, TX 75692 | Oil Operator | May 2026 |
| 16156 | Landmark Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | Mar 2026 |
| 16157 | Landmark Energy Partners, LLC | Edmond, OK 73013 | Oil Operator | Apr 2026 |
| 16158 | Landmark Exploration Co | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2013 |
| 16159 | Landmark Exploration Inc. | Caldwell, TX 77836 | Oil & Gas Operator | May 2026 |
| 16160 | Landmark Ip, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2026 |
| 16161 | Landmark Oil & G | | Oil Operator | Nov 1987 |
| 16162 | Landmark Oil Exp | | Oil Operator | Sep 1994 |
| 16163 | Landmark Operating Company | Welty, OK 74833-3923 | Oil Operator | Aug 2015 |
| 16164 | Landmark Production Company | MC Gregor, TX 76657 | Oil & Gas Operator | Oct 2010 |
| 16165 | Landmark Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jan 2026 |
| 16166 | Landmark Venture Group No. 1, Inc. | | Oil & Gas Operator | Jan 2025 |
| 16167 | Landmark Venture Group, Inc. | | Oil Operator | Dec 2008 |
| 16168 | Landmaster Partners, Inc. | Abilene, TX 79601 | Oil & Gas Operator | May 2026 |
| 16169 | Landmen Of Texas | Hondo, TX 78861 | Oil Operator | Feb 2007 |
| 16170 | Landmen Of Texas, Inc. | Hondo, TX 78861 | Oil Operator | Dec 2016 |
| 16171 | Landor Oil Co. | San Marcos, TX 78666 | Oil Operator | May 2026 |
| 16172 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 16173 | Landprovest Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1993 |
| 16174 | Landreth, Robert E. | Midland, TX 79701 | Oil & Gas Operator | May 2026 |
| 16175 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | May 2026 |
| 16176 | Landrum Petroleum Co., Inc. | Burkburnett, TX 76354 | Oil Operator | Mar 2008 |
| 16177 | Landrum West, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 1997 |
| 16178 | Landrum, W. A. | Byers, TX 76357 | Oil & Gas Operator | Apr 2002 |
| 16179 | Lane Oil Company, LLC | Northern Cambria, PA 15714 | Oil Operator | Dec 2024 |
| 16180 | Lane Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2026 |
| 16181 | Lane, Lloyd L. | Buffalo, TX 75831 | Oil Operator | May 2026 |
| 16182 | Laneer Resources Company | Abilene, TX 79608 | Oil & Gas Operator | May 2026 |
| 16183 | Lanexco, Inc. | Sealy, TX 77474 | Oil & Gas Operator | May 2026 |
| 16184 | Lanford Drilling Co., Inc. | | Oil Operator | Jun 1996 |
| 16185 | Lang Larry D | Beverly, OH 45715 | Oil & Gas Operator | Dec 2024 |
| 16186 | Lang, Herman - Marital Trust | Garden City, KS 67846 | Oil & Gas Operator | Jan 2026 |
| 16187 | Lang, Kenneth R. | Garden City, KS 67846 | Oil & Gas Operator | Jan 2026 |
| 16188 | Langasco Energy Corp | Alliance, OH 44601 | Oil & Gas Operator | Dec 1987 |
| 16189 | Langford & Brigham Operating LLC | Austin, TX 78730 | Oil & Gas Operator | May 2026 |
| 16190 | Langford Production Company, LLC | Haskell, TX 79521 | Oil & Gas Operator | May 2026 |
| 16191 | Langford, G. E. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2002 |
| 16192 | Langford, R. C. Operating Co. | Rule, TX 79547 | Oil & Gas Operator | Mar 1994 |
| 16193 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 16194 | Langley Energy | Euless, TX 76040 | Gas Operator | Jan 2016 |
| 16195 | Langley Harold | Graham, OK 73437 | Oil Operator | Feb 2026 |
| 16196 | Langley, James Operating Company, Inc | Smackover, AR 71762 | Oil & Gas Operator | Jan 2025 |
| 16197 | Langley, Jerry Oil Company LLC | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 16198 | Langston Oil & Gas LLC | Wichita, KS 67202 | Oil Operator | Nov 2025 |
| 16199 | Lankford & Nance | | Gas Operator | Dec 2010 |
| 16200 | Lankford Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1999 |