| 17001 | Legendary Oil Co., Inc. | | Oil Operator | Feb 2004 |
| 17002 | Legendary Well Service, Inc. | | Oil Operator | Jan 1996 |
| 17003 | Leger Production Company, Inc. | | Oil & Gas Operator | Apr 1984 |
| 17004 | Legg, Raymond | | Oil Operator | Dec 2010 |
| 17005 | Leggett Oil Company | Dallas, TX 75379 | Oil & Gas Operator | Oct 1999 |
| 17006 | Leggett Petroleum, L.L.C. | | Oil & Gas Operator | Dec 2020 |
| 17007 | Legleiter, Julius A. | Hays, KS 67601 | Oil Operator | Apr 1996 |
| 17008 | Legrand, Buck | Sedan, KS 67361 | Oil Operator | Jun 1994 |
| 17009 | Lehnertz, G. M. | Tyler, TX 75702 | Oil & Gas Operator | Dec 1998 |
| 17010 | Lehnertz-Faulkner, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Feb 2023 |
| 17011 | Leicht, Cecil | Streetman, TX 75859 | Oil & Gas Operator | Feb 1998 |
| 17012 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 17013 | Leighty, Roger Operator | Lawrenceville, IL 62439 | Oil & Gas Operator | Oct 1997 |
| 17014 | Leiker, Edward P. | Hays, KS 67601 | Oil Operator | Apr 1992 |
| 17015 | Leis Oil Services, LLC | Yates Center, KS 66783 | Oil Operator | Jul 2023 |
| 17016 | Leis, John E. | Yates Center, KS 66783 | Oil Operator | Jan 2025 |
| 17017 | Leis, Ryan M. | Scottsdale, AZ 85258 | Oil & Gas Operator | Dec 2009 |
| 17018 | Leis, Steven A. | Yates Center, KS 66783 | Oil Operator | Jan 2025 |
| 17019 | Leis, VIctor J. | Paola, KS 66071 | Oil & Gas Operator | Dec 2024 |
| 17020 | Leith Operations | | Oil Operator | Jul 1989 |
| 17021 | Lejan, Inc. | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 17022 | Lekan James V | Ashland, OH 44805 | Oil & Gas Operator | Dec 1997 |
| 17023 | Leland Oil & Gas, LLC | | Oil & Gas Operator | Mar 2025 |
| 17024 | Leland Petroleum Production Inc | | Oil & Gas Operator | Dec 2007 |
| 17025 | Lem Operating Co., Inc. | Colorado City, TX 79512 | Oil & Gas Operator | Nov 2012 |
| 17026 | Lema Petroleum Inc | Seminole, OK 74868 | Oil & Gas Operator | Feb 2025 |
| 17027 | Lemasters, Charles A. | Jacksonburg, WV 26377-0000 | Oil & Gas Operator | Dec 2021 |
| 17028 | Lemay Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Jun 2002 |
| 17029 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Jan 2025 |
| 17030 | Lemon, Richard F. Jr. | Carrollton, TX 75006 | Oil & Gas Operator | May 2025 |
| 17031 | Lenape Resources Corp | | Oil & Gas Operator | Dec 2000 |
| 17032 | Lenape Resources LLC | Alexander, NY 14005 | Oil & Gas Operator | Dec 2023 |
| 17033 | Lendrum Energy LLC | Cranberry, PA 16319-4009 | Oil & Gas Operator | Dec 2023 |
| 17034 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 17035 | Lengacher William P | Creston, OH 44217 | Oil & Gas Operator | Dec 2022 |
| 17036 | Lenhart Oil Company | Cashion, OK 73016-0188 | Oil & Gas Operator | Jul 2016 |
| 17037 | Lennon Oil Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2008 |
| 17038 | Leo Michaelis Oil Operator | | Oil Operator | Oct 2002 |
| 17039 | Leo Vesenmeir, Jr. | | Oil & Gas Operator | Jul 1987 |
| 17040 | Leo Windham | | Oil Operator | Jul 1992 |
| 17041 | Leon J. Sabean | | Oil & Gas Operator | Dec 2018 |
| 17042 | Leonard 1&2 LLC | | Oil Operator | Mar 2025 |
| 17043 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | May 2025 |
| 17044 | Leonard Vann | | Oil Operator | Feb 2025 |
| 17045 | Leonard, Daniel M. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2001 |
| 17046 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | May 2025 |
| 17047 | Leonard, Jon N And Dottie L | Williamstown, WV 26187 | Gas Operator | Dec 2021 |
| 17048 | Leonard, Patricia Anne | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1996 |
| 17049 | Leone, Thomas E. | Elma, NY 14059 | Gas Operator | Dec 2023 |
| 17050 | Leopard, Glenn | Malakoff, TX 75148 | Oil & Gas Operator | Aug 2003 |
| 17051 | Leopoldo P Bustamante | Midland, TX 79710 | Oil & Gas Operator | Apr 2012 |
| 17052 | Leor Energy Indigo L.P. | Houston, TX 77079 | Gas Operator | Oct 2017 |
| 17053 | Lep Development Company, LLC | Houston, TX 77007 | Oil & Gas Operator | Jul 2020 |
| 17054 | Lepp, Paul N. | Cherry Creek, NY 14723 | Gas Operator | Dec 2023 |
| 17055 | Lera | Borger, TX 79007 | Oil & Gas Operator | May 2025 |
| 17056 | Lerblance Jr W P Estate | Hartshorne, OK 74547-0449 | Oil & Gas Operator | Apr 2020 |
| 17057 | Leroy Holt Oil Operations | | Oil Operator | Mar 2010 |
| 17058 | Leroy Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2002 |
| 17059 | Leroy W. James | | Oil & Gas Operator | Oct 1991 |
| 17060 | Les Miller | | Oil & Gas Operator | Dec 1991 |
| 17061 | Lesco Corp. | | Oil Operator | Dec 2000 |
| 17062 | Leshen Energy USA LLC | | Oil Operator | Jan 2025 |
| 17063 | Lesikar, L. W. | Fort Worth, TX 76121 | Oil & Gas Operator | Jun 2006 |
| 17064 | Leslie Oil & Gas Co Inc | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1991 |
| 17065 | Lester Joan | Sand Springs, OK 74063 | Oil & Gas Operator | Feb 2025 |
| 17066 | Lester L Moyer | Cooperstown, PA 16317-2917 | Gas Operator | Dec 2009 |
| 17067 | Letog LLC | Orwell, OH 44076 | Oil & Gas Operator | Dec 2024 |
| 17068 | Letwin & Kallison | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2004 |
| 17069 | Lety Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2002 |
| 17070 | Levant Energy LLC | Milton, MA 02186 | Oil Operator | May 2025 |
| 17071 | Levee Oil LLC | Tuscola, TX 79562 | Oil Operator | May 2025 |
| 17072 | Levengood Oil & Gas(Us)In | Dover, OH 44621-2900-2900 | Oil & Gas Operator | Dec 1997 |
| 17073 | Levens, C. H. | Water Valley, TX 76958 | Oil & Gas Operator | May 2010 |
| 17074 | Leverage Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Dec 2021 |
| 17075 | Levi Oil Company | Wichita, KS 67218 | Oil & Gas Operator | Nov 1993 |
| 17076 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 17077 | Levinson Silvan E | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2012 |
| 17078 | Levisay Operating Co. | Brownwood, TX 76801 | Oil & Gas Operator | May 2025 |
| 17079 | Lewbet Inc | Perry, OK 73077 | Oil & Gas Operator | Aug 2024 |
| 17080 | Lewis & Clark Exploration | | Oil Operator | Feb 1989 |
| 17081 | Lewis & Clark Exploration Company | | Oil Operator | Jan 2005 |
| 17082 | Lewis & Hays | Albany, TX 76430 | Oil & Gas Operator | Feb 2002 |
| 17083 | Lewis & Manziel | | Oil Operator | Apr 1989 |
| 17084 | Lewis A Hembree Production Co | Shawnee, OK 74801 | Oil & Gas Operator | Feb 2025 |
| 17085 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | Feb 2025 |
| 17086 | Lewis Heirs 480, LLC | Bryson, TX 76427 | Oil & Gas Operator | May 2025 |
| 17087 | Lewis J K | Duncan, OK 73534-1742 | Oil & Gas Operator | Apr 2015 |
| 17088 | Lewis James D Oil Company | Healdton, OK 73438 | Oil Operator | Jan 2025 |
| 17089 | Lewis John L Well Service | Sasakwa, OK 74867 | Oil Operator | May 2013 |
| 17090 | Lewis Oil & Gas Of Galva, Inc. | Galva, KS 67443 | Oil Operator | Jan 2025 |
| 17091 | Lewis Oil And Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 17092 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Feb 2025 |
| 17093 | Lewis Oil Operations LLC | Ratliff City, OK 73481 | Oil & Gas Operator | Feb 2025 |
| 17094 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | May 2025 |
| 17095 | Lewis Petro Properties, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | May 2025 |
| 17096 | Lewis Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 1995 |
| 17097 | Lewis Williams | | Oil & Gas Operator | Feb 1991 |
| 17098 | Lewis Yale H | | Oil & Gas Operator | Aug 1986 |
| 17099 | Lewis, Bryan | Andover, NY 14806 | Oil & Gas Operator | Dec 2023 |
| 17100 | Lewis, Freddie | | Oil Operator | Dec 2023 |