| 16901 | Leiker, Edward P. | Hays, KS 67601 | Oil Operator | Apr 1992 |
| 16902 | Leis Oil Services, LLC | Yates Center, KS 66783 | Oil Operator | Jul 2023 |
| 16903 | Leis, John E. | Yates Center, KS 66783 | Oil Operator | Apr 2025 |
| 16904 | Leis, Ryan M. | Scottsdale, AZ 85258 | Oil & Gas Operator | Dec 2009 |
| 16905 | Leis, Steven A. | Yates Center, KS 66783 | Oil Operator | Apr 2025 |
| 16906 | Leis, VIctor J. | Paola, KS 66071 | Oil & Gas Operator | Apr 2025 |
| 16907 | Leith Operations | | Oil Operator | Jul 1989 |
| 16908 | Lejan, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Sep 2025 |
| 16909 | Lekan James V | Ashland, OH 44805 | Oil & Gas Operator | Dec 1997 |
| 16910 | Leland Oil & Gas, LLC | | Oil & Gas Operator | Jul 2025 |
| 16911 | Leland Petroleum Production Inc | | Oil & Gas Operator | Dec 2007 |
| 16912 | Lem Operating Co., Inc. | Colorado City, TX 79512 | Oil & Gas Operator | Nov 2012 |
| 16913 | Lema Petroleum Inc | Seminole, OK 74868 | Oil & Gas Operator | Jun 2025 |
| 16914 | Lemasters, Charles A. | Jacksonburg, WV 26377-0000 | Oil & Gas Operator | Dec 2021 |
| 16915 | Lemay Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Jun 2002 |
| 16916 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Jan 2025 |
| 16917 | Lemon, Richard F. Jr. | Carrollton, TX 75006 | Oil & Gas Operator | Sep 2025 |
| 16918 | Lenape Resources Corp | | Oil & Gas Operator | Dec 2000 |
| 16919 | Lenape Resources LLC | Alexander, NY 14005 | Oil & Gas Operator | Dec 2024 |
| 16920 | Lendrum Energy LLC | Cranberry, PA 16319-4009 | Oil & Gas Operator | Dec 2023 |
| 16921 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 16922 | Lengacher William P | Creston, OH 44217 | Oil & Gas Operator | Dec 2024 |
| 16923 | Lenhart Oil Company | Cashion, OK 73016-0188 | Oil & Gas Operator | Jul 2016 |
| 16924 | Lennon Oil Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2008 |
| 16925 | Leo Michaelis Oil Operator | | Oil Operator | Oct 2002 |
| 16926 | Leo Vesenmeir, Jr. | | Oil & Gas Operator | Jul 1987 |
| 16927 | Leo Windham | | Oil Operator | Jul 1992 |
| 16928 | Leon J. Sabean | | Oil & Gas Operator | Dec 2018 |
| 16929 | Leonard 1&2 LLC | | Oil Operator | Jul 2025 |
| 16930 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2025 |
| 16931 | Leonard Vann | | Oil Operator | Feb 2025 |
| 16932 | Leonard, Daniel M. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2001 |
| 16933 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | Sep 2025 |
| 16934 | Leonard, Patricia Anne | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1996 |
| 16935 | Leone, Thomas E. | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 16936 | Leopard, Glenn | Malakoff, TX 75148 | Oil & Gas Operator | Aug 2003 |
| 16937 | Leopold Oil Company | Bartlesville, OK 74003 | Oil & Gas Operator | May 2025 |
| 16938 | Leopoldo P Bustamante | Midland, TX 79710 | Oil & Gas Operator | Apr 2012 |
| 16939 | Leor Energy Indigo L.P. | Houston, TX 77079 | Gas Operator | Oct 2017 |
| 16940 | Lep Development Company, LLC | Houston, TX 77007 | Oil & Gas Operator | Jul 2020 |
| 16941 | Lepp, Paul N. | Cherry Creek, NY 14723 | Gas Operator | Dec 2024 |
| 16942 | Lera | Borger, TX 79007 | Oil & Gas Operator | Sep 2025 |
| 16943 | Lerblance Jr W P Estate | Hartshorne, OK 74547-0449 | Oil & Gas Operator | Apr 2020 |
| 16944 | Leroy Holt Oil Operations | | Oil Operator | Mar 2010 |
| 16945 | Leroy Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2002 |
| 16946 | Leroy W. James | | Oil & Gas Operator | Oct 1991 |
| 16947 | Les Miller | | Oil & Gas Operator | Dec 1991 |
| 16948 | Lesco Corp. | | Oil Operator | Dec 2000 |
| 16949 | Leshen Energy USA LLC | | Oil Operator | Jan 2025 |
| 16950 | Lesikar, L. W. | Fort Worth, TX 76121 | Oil & Gas Operator | Jun 2006 |
| 16951 | Leslie Oil & Gas Co Inc | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1991 |
| 16952 | Lester Joan | Sand Springs, OK 74063 | Oil & Gas Operator | May 2025 |
| 16953 | Lester L Moyer | Cooperstown, PA 16317-2917 | Gas Operator | Dec 2009 |
| 16954 | Letog LLC | Orwell, OH 44076 | Oil & Gas Operator | Dec 2024 |
| 16955 | Letwin & Kallison | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2004 |
| 16956 | Lety Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2002 |
| 16957 | Levant Energy LLC | Milton, MA 02186 | Oil Operator | Sep 2025 |
| 16958 | Levee Oil LLC | Tuscola, TX 79562 | Oil Operator | Sep 2025 |
| 16959 | Levengood Oil & Gas(Us)In | Dover, OH 44621-2900 | Oil & Gas Operator | Dec 1997 |
| 16960 | Levens, C. H. | Water Valley, TX 76958 | Oil & Gas Operator | May 2010 |
| 16961 | Leverage Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Dec 2021 |
| 16962 | Levi Oil Company | Wichita, KS 67218 | Oil & Gas Operator | Nov 1993 |
| 16963 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 16964 | Levinson Silvan E | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2012 |
| 16965 | Levisay Operating Co. | Brownwood, TX 76801 | Oil & Gas Operator | Sep 2025 |
| 16966 | Lewbet Inc | Perry, OK 73077 | Oil & Gas Operator | Aug 2024 |
| 16967 | Lewis & Clark Exploration | | Oil Operator | Feb 1989 |
| 16968 | Lewis & Clark Exploration Company | | Oil Operator | Jan 2005 |
| 16969 | Lewis & Hays | Albany, TX 76430 | Oil & Gas Operator | Feb 2002 |
| 16970 | Lewis & Manziel | | Oil Operator | Apr 1989 |
| 16971 | Lewis A Hembree Production Co | Shawnee, OK 74801 | Oil & Gas Operator | May 2025 |
| 16972 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | May 2025 |
| 16973 | Lewis Heirs 480, LLC | Bryson, TX 76427 | Oil & Gas Operator | Sep 2025 |
| 16974 | Lewis J K | Duncan, OK 73534-1742 | Oil & Gas Operator | Apr 2015 |
| 16975 | Lewis James D Oil Company | Healdton, OK 73438 | Oil Operator | Apr 2025 |
| 16976 | Lewis John L Well Service | Sasakwa, OK 74867 | Oil Operator | May 2013 |
| 16977 | Lewis Oil & Gas Of Galva, Inc. | Galva, KS 67443 | Oil Operator | Apr 2025 |
| 16978 | Lewis Oil And Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 16979 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | May 2025 |
| 16980 | Lewis Oil Operations LLC | Ratliff City, OK 73481 | Oil & Gas Operator | May 2025 |
| 16981 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Sep 2025 |
| 16982 | Lewis Petro Properties, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Sep 2025 |
| 16983 | Lewis Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 1995 |
| 16984 | Lewis Williams | | Oil & Gas Operator | Feb 1991 |
| 16985 | Lewis Yale H | | Oil & Gas Operator | Aug 1986 |
| 16986 | Lewis, Bryan | Andover, NY 14806 | Oil & Gas Operator | Dec 2024 |
| 16987 | Lewis, Freddie | | Oil Operator | Dec 2023 |
| 16988 | Lewis, James B. Land & Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Nov 1998 |
| 16989 | Lewis, R. J. Oil Company | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 16990 | Lewis, T. K. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Sep 2025 |
| 16991 | Lewis, William T. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 16992 | Lex And Lace Petroleum, LLC | Houston, TX 77269 | Oil Operator | Sep 2025 |
| 16993 | Lexgas, Inc. | Roanoke, TX 76262 | Oil & Gas Operator | Sep 2025 |
| 16994 | Lexico Exploration | | Oil Operator | Mar 1986 |
| 16995 | Lexicon Resources Corporation | | Oil & Gas Operator | Apr 1986 |
| 16996 | Lexus Gas Corporation | Roanoke, TX 76262 | Oil & Gas Operator | Jul 2005 |
| 16997 | LG&S Oil Company, LLC | Lovington, NM 88260 | Oil Operator | Jun 2025 |
| 16998 | LGDC Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Sep 2025 |
| 16999 | LGS Exploration Program | | Gas Operator | Jul 1990 |
| 17000 | LGS Exploration, Inc. | | Oil & Gas Operator | Jan 1991 |