| 17001 | Legacy Exploration, LLC I | Dallas, TX 75201 | Oil & Gas Operator | Dec 2025 |
| 17002 | Legacy Oil & Gas ND, Inc. | | Oil & Gas Operator | Feb 2016 |
| 17003 | Legacy Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Dec 2025 |
| 17004 | Legacy Oil, LLC | Falls Of Rough, KY 40119 | Oil Operator | Dec 2023 |
| 17005 | Legacy Oklahoma Operators LLC | Shawnee, OK 74804-1447 | Oil & Gas Operator | Aug 2025 |
| 17006 | Legacy Operating Company | | Oil & Gas Operator | Aug 1992 |
| 17007 | Legacy Operating Company, LLC | Dallas, TX 75205 | Oil Operator | Jun 2024 |
| 17008 | Legacy Petroleum Corporation | Dallas, TX 75225 | Oil & Gas Operator | Mar 2019 |
| 17009 | Legacy Petroleum LLC | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2025 |
| 17010 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Dec 2025 |
| 17011 | Legacy Resources Co., L.P. | | Oil & Gas Operator | Apr 2019 |
| 17012 | Legado DJ, LLC | | Oil & Gas Operator | Jul 2011 |
| 17013 | Legado Gulf Coast, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2010 |
| 17014 | Legado Midcon LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2010 |
| 17015 | Legado Permian, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2013 |
| 17016 | Legend Energy Corporation | Stillwater, OK 74074-1721 | Oil & Gas Operator | Aug 2022 |
| 17017 | Legend Energy LLC | Cherryvale, KS 67335 | Oil Operator | May 2025 |
| 17018 | Legend Energy Texas, LLC | Arlington, TX 76002 | Oil & Gas Operator | Dec 2025 |
| 17019 | Legend Fund, LLC | | Oil & Gas Operator | Jan 2025 |
| 17020 | Legend Natural Gas II, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 17021 | Legend Natural Gas III, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 17022 | Legend Natural Gas IV, LP | Houston, TX 77094 | Oil & Gas Operator | Feb 2015 |
| 17023 | Legend Natural Gas, LP | Houston, TX 77084 | Oil & Gas Operator | Aug 2004 |
| 17024 | Legend Oil & Gas LTD. | Alpharetta, GA 30022 | Oil Operator | Mar 2015 |
| 17025 | Legend Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2010 |
| 17026 | Legendary Oil Co., Inc. | | Oil Operator | Feb 2004 |
| 17027 | Legendary Well Service, Inc. | | Oil Operator | Jan 1996 |
| 17028 | Leger Production Company, Inc. | | Oil & Gas Operator | Apr 1984 |
| 17029 | Legg, Raymond | | Oil Operator | Dec 2010 |
| 17030 | Leggett Oil Company | Dallas, TX 75379 | Oil & Gas Operator | Oct 1999 |
| 17031 | Leggett Petroleum, L.L.C. | | Oil & Gas Operator | Dec 2020 |
| 17032 | Legleiter, Julius A. | Hays, KS 67601 | Oil Operator | Apr 1996 |
| 17033 | Legrand, Buck | Sedan, KS 67361 | Oil Operator | Jun 1994 |
| 17034 | Lehnertz, G. M. | Tyler, TX 75702 | Oil & Gas Operator | Dec 1998 |
| 17035 | Lehnertz-Faulkner, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Feb 2023 |
| 17036 | Leicht, Cecil | Streetman, TX 75859 | Oil & Gas Operator | Feb 1998 |
| 17037 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 17038 | Leighty, Roger Operator | Lawrenceville, IL 62439 | Oil & Gas Operator | Oct 1997 |
| 17039 | Leiker, Edward P. | Hays, KS 67601 | Oil Operator | Apr 1992 |
| 17040 | Leis Oil Services, LLC | Yates Center, KS 66783 | Oil Operator | Jul 2023 |
| 17041 | Leis, John E. | Yates Center, KS 66783 | Oil Operator | Jun 2025 |
| 17042 | Leis, Ryan M. | Scottsdale, AZ 85258 | Oil & Gas Operator | Dec 2009 |
| 17043 | Leis, Steven A. | Yates Center, KS 66783 | Oil Operator | Jun 2025 |
| 17044 | Leis, VIctor J. | Paola, KS 66071 | Oil & Gas Operator | Jun 2025 |
| 17045 | Leith Operations | | Oil Operator | Jul 1989 |
| 17046 | Lejan, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Dec 2025 |
| 17047 | Lekan James V | Ashland, OH 44805 | Oil & Gas Operator | Dec 1997 |
| 17048 | Leland Oil & Gas, LLC | | Oil & Gas Operator | Oct 2025 |
| 17049 | Leland Petroleum Production Inc | | Oil & Gas Operator | Dec 2007 |
| 17050 | Lem Operating Co., Inc. | Colorado City, TX 79512 | Oil & Gas Operator | Nov 2012 |
| 17051 | Lema Petroleum Inc | Seminole, OK 74868 | Oil & Gas Operator | Sep 2025 |
| 17052 | Lemay Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Jun 2002 |
| 17053 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Aug 2025 |
| 17054 | Lemon, Richard F. Jr. | Carrollton, TX 75006 | Oil & Gas Operator | Dec 2025 |
| 17055 | Lenape Resources Corp | | Oil & Gas Operator | Dec 2000 |
| 17056 | Lenape Resources LLC | Alexander, NY 14005 | Oil & Gas Operator | Dec 2024 |
| 17057 | Lendrum Energy LLC | Cranberry, PA 16319-4009 | Oil & Gas Operator | Dec 2023 |
| 17058 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 17059 | Lengacher William P | Creston, OH 44217 | Oil & Gas Operator | Dec 2024 |
| 17060 | Lenhart Oil Company | Cashion, OK 73016-0188 | Oil & Gas Operator | Jul 2016 |
| 17061 | Lennon Oil Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2008 |
| 17062 | Leo Michaelis Oil Operator | | Oil Operator | Oct 2002 |
| 17063 | Leo Vesenmeir, Jr. | | Oil & Gas Operator | Jul 1987 |
| 17064 | Leo Windham | | Oil Operator | Jul 1992 |
| 17065 | Leon J. Sabean | | Oil & Gas Operator | Dec 2018 |
| 17066 | Leonard 1&2 LLC | | Oil Operator | Oct 2025 |
| 17067 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Dec 2025 |
| 17068 | Leonard Vann | | Oil Operator | Feb 2025 |
| 17069 | Leonard, Daniel M. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2001 |
| 17070 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | Dec 2025 |
| 17071 | Leonard, Patricia Anne | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1996 |
| 17072 | Leone, Thomas E. | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 17073 | Leopard, Glenn | Malakoff, TX 75148 | Oil & Gas Operator | Aug 2003 |
| 17074 | Leopold Oil Company | Bartlesville, OK 74003 | Oil & Gas Operator | Aug 2025 |
| 17075 | Leopoldo P Bustamante | Midland, TX 79710 | Oil & Gas Operator | Apr 2012 |
| 17076 | Leor Energy Indigo L.P. | Houston, TX 77079 | Gas Operator | Oct 2017 |
| 17077 | Lep Development Company, LLC | Houston, TX 77007 | Oil & Gas Operator | Jul 2020 |
| 17078 | Lepp, Paul N. | Cherry Creek, NY 14723 | Gas Operator | Dec 2024 |
| 17079 | Lera | Borger, TX 79007 | Oil & Gas Operator | Dec 2025 |
| 17080 | Lerblance Jr W P Estate | Hartshorne, OK 74547-0449 | Oil & Gas Operator | Apr 2020 |
| 17081 | Leroy Holt Oil Operations | | Oil Operator | Mar 2010 |
| 17082 | Leroy Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2002 |
| 17083 | Leroy W. James | | Oil & Gas Operator | Oct 1991 |
| 17084 | Les Miller | | Oil & Gas Operator | Dec 1991 |
| 17085 | Lesco Corp. | | Oil Operator | Dec 2000 |
| 17086 | Leshen Energy USA LLC | | Oil Operator | Jan 2025 |
| 17087 | Lesikar, L. W. | Fort Worth, TX 76121 | Oil & Gas Operator | Jun 2006 |
| 17088 | Leslie Oil & Gas Co Inc | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1991 |
| 17089 | Lester Joan | Sand Springs, OK 74063 | Oil & Gas Operator | Aug 2025 |
| 17090 | Lester L Moyer | Cooperstown, PA 16317-2917 | Gas Operator | Dec 2009 |
| 17091 | Letog LLC | Orwell, OH 44076 | Oil & Gas Operator | Dec 2024 |
| 17092 | Letwin & Kallison | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2004 |
| 17093 | Lety Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2002 |
| 17094 | Levant Energy LLC | Milton, MA 02186 | Oil Operator | Dec 2025 |
| 17095 | Levee Oil LLC | Tuscola, TX 79562 | Oil Operator | Dec 2025 |
| 17096 | Levengood Oil & Gas(Us)In | Dover, OH 44621-2900 | Oil & Gas Operator | Dec 1997 |
| 17097 | Levens, C. H. | Water Valley, TX 76958 | Oil & Gas Operator | May 2010 |
| 17098 | Leverage Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Dec 2021 |
| 17099 | Levi Oil Company | Wichita, KS 67218 | Oil & Gas Operator | Nov 1993 |
| 17100 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |