| 17201 | Leger Production Company, Inc. | | Oil & Gas Operator | Apr 1984 |
| 17202 | Legg, Raymond | | Oil Operator | Dec 2010 |
| 17203 | Leggett Oil Company | Dallas, TX 75379 | Oil & Gas Operator | Oct 1999 |
| 17204 | Leggett Petroleum, L.L.C. | | Oil & Gas Operator | Dec 2020 |
| 17205 | Legleiter, Julius A. | Hays, KS 67601 | Oil Operator | Apr 1996 |
| 17206 | Legrand, Buck | Sedan, KS 67361 | Oil Operator | Jun 1994 |
| 17207 | Lehnertz, G. M. | Tyler, TX 75702 | Oil & Gas Operator | Dec 1998 |
| 17208 | Lehnertz-Faulkner, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Feb 2023 |
| 17209 | Leicht, Cecil | Streetman, TX 75859 | Oil & Gas Operator | Feb 1998 |
| 17210 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 17211 | Leighty, Roger Operator | Lawrenceville, IL 62439 | Oil & Gas Operator | Oct 1997 |
| 17212 | Leiker, Edward P. | Hays, KS 67601 | Oil Operator | Apr 1992 |
| 17213 | Leis Oil Services, LLC | Yates Center, KS 66783 | Oil Operator | Jul 2023 |
| 17214 | Leis, John E. | Yates Center, KS 66783 | Oil Operator | Dec 2024 |
| 17215 | Leis, Ryan M. | Scottsdale, AZ 85258 | Oil & Gas Operator | Dec 2009 |
| 17216 | Leis, Steven A. | Yates Center, KS 66783 | Oil Operator | Dec 2024 |
| 17217 | Leis, VIctor J. | Paola, KS 66071 | Oil & Gas Operator | Dec 2024 |
| 17218 | Leith Operations | | Oil Operator | Jul 1989 |
| 17219 | Lejan, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 17220 | Lekan James V | Ashland, OH 44805 | Oil & Gas Operator | Dec 1997 |
| 17221 | Leland Oil & Gas, LLC | | Oil & Gas Operator | Feb 2025 |
| 17222 | Leland Petroleum Production Inc | | Oil & Gas Operator | Dec 2007 |
| 17223 | Lem Operating Co., Inc. | Colorado City, TX 79512 | Oil & Gas Operator | Nov 2012 |
| 17224 | Lema Petroleum Inc | Seminole, OK 74868 | Oil & Gas Operator | Jan 2025 |
| 17225 | Lemasters, Charles A. | Jacksonburg, WV 26377-0000 | Oil & Gas Operator | Dec 2021 |
| 17226 | Lemay Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Jun 2002 |
| 17227 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Jan 2025 |
| 17228 | Lemmons Jack | Cleveland, OK 74020-7023 | Oil Operator | Jan 2015 |
| 17229 | Lemon, Richard F. Jr. | Carrollton, TX 75006 | Oil & Gas Operator | Apr 2025 |
| 17230 | Lenape Resources Corp | | Oil & Gas Operator | Dec 2000 |
| 17231 | Lenape Resources LLC | Alexander, NY 14005 | Oil & Gas Operator | Dec 2023 |
| 17232 | Lendrum Energy LLC | Cranberry, PA 16319-4009 | Oil & Gas Operator | Dec 2023 |
| 17233 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 17234 | Lengacher William P | Creston, OH 44217 | Oil & Gas Operator | Dec 2022 |
| 17235 | Lenhart Oil Company | Cashion, OK 73016-0188 | Oil & Gas Operator | Jul 2016 |
| 17236 | Lennon Oil Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2008 |
| 17237 | Leo Michaelis Oil Operator | | Oil Operator | Oct 2002 |
| 17238 | Leo Vesenmeir, Jr. | | Oil & Gas Operator | Jul 1987 |
| 17239 | Leo Windham | | Oil Operator | Jul 1992 |
| 17240 | Leon J. Sabean | | Oil & Gas Operator | Dec 2018 |
| 17241 | Leonard 1&2 LLC | | Oil Operator | Dec 2024 |
| 17242 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2025 |
| 17243 | Leonard Vann | | Oil Operator | Feb 2025 |
| 17244 | Leonard, Daniel M. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2001 |
| 17245 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | Apr 2025 |
| 17246 | Leonard, Jon N And Dottie L | Williamstown, WV 26187 | Gas Operator | Dec 2021 |
| 17247 | Leonard, Patricia Anne | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1996 |
| 17248 | Leone, Thomas E. | Elma, NY 14059 | Gas Operator | Dec 2023 |
| 17249 | Leopard, Glenn | Malakoff, TX 75148 | Oil & Gas Operator | Aug 2003 |
| 17250 | Leopold Oil Company | Bartlesville, OK 74003 | Oil & Gas Operator | Jan 2025 |
| 17251 | Leopoldo P Bustamante | Midland, TX 79710 | Oil & Gas Operator | Apr 2012 |
| 17252 | Leor Energy Indigo L.P. | Houston, TX 77079 | Gas Operator | Oct 2017 |
| 17253 | Lep Development Company, LLC | Houston, TX 77007 | Oil & Gas Operator | Jul 2020 |
| 17254 | Lepp, Paul N. | Cherry Creek, NY 14723 | Gas Operator | Dec 2023 |
| 17255 | Lera | Borger, TX 79007 | Oil & Gas Operator | Apr 2025 |
| 17256 | Lerblance Jr W P Estate | Hartshorne, OK 74547-0449 | Oil & Gas Operator | Apr 2020 |
| 17257 | Leroy Holt Oil Operations | | Oil Operator | Mar 2010 |
| 17258 | Leroy Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2002 |
| 17259 | Leroy W. James | | Oil & Gas Operator | Oct 1991 |
| 17260 | Les Miller | | Oil & Gas Operator | Dec 1991 |
| 17261 | Lesco Corp. | | Oil Operator | Dec 2000 |
| 17262 | Leshen Energy USA LLC | | Oil Operator | Jan 2025 |
| 17263 | Lesikar, L. W. | Fort Worth, TX 76121 | Oil & Gas Operator | Jun 2006 |
| 17264 | Leslie Oil & Gas Co Inc | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1991 |
| 17265 | Lester Joan | Sand Springs, OK 74063 | Oil & Gas Operator | Jan 2025 |
| 17266 | Lester L Moyer | Cooperstown, PA 16317-2917 | Gas Operator | Dec 2009 |
| 17267 | Letog LLC | Orwell, OH 44076 | Oil & Gas Operator | Dec 2024 |
| 17268 | Letwin & Kallison | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2004 |
| 17269 | Lety Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2002 |
| 17270 | Levant Energy LLC | Milton, MA 02186 | Oil Operator | Apr 2025 |
| 17271 | Levee Oil LLC | Tuscola, TX 79562 | Oil Operator | Apr 2025 |
| 17272 | Levengood Oil & Gas(Us)In | Dover, OH 44621-2900-2900 | Oil & Gas Operator | Dec 1997 |
| 17273 | Levens, C. H. | Water Valley, TX 76958 | Oil & Gas Operator | May 2010 |
| 17274 | Leverage Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Dec 2021 |
| 17275 | Levi Oil Company | Wichita, KS 67218 | Oil & Gas Operator | Nov 1993 |
| 17276 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 17277 | Levinson Silvan E | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2012 |
| 17278 | Levisay Operating Co. | Brownwood, TX 76801 | Oil & Gas Operator | Apr 2025 |
| 17279 | Lewbet Inc | Perry, OK 73077-8914 | Oil & Gas Operator | Aug 2024 |
| 17280 | Lewis & Clark Exploration | | Oil Operator | Feb 1989 |
| 17281 | Lewis & Clark Exploration Company | | Oil Operator | Jan 2005 |
| 17282 | Lewis & Hays | Albany, TX 76430 | Oil & Gas Operator | Feb 2002 |
| 17283 | Lewis & Manziel | | Oil Operator | Apr 1989 |
| 17284 | Lewis A Hembree Production Co | Shawnee, OK 74801 | Oil & Gas Operator | Jan 2025 |
| 17285 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | Jan 2025 |
| 17286 | Lewis Heirs 480, LLC | Bryson, TX 76427 | Oil & Gas Operator | Apr 2025 |
| 17287 | Lewis J K | Duncan, OK 73534-1742 | Oil & Gas Operator | Apr 2015 |
| 17288 | Lewis James D Oil Company | Healdton, OK 73438 | Oil Operator | Jan 2025 |
| 17289 | Lewis John L Well Service | Sasakwa, OK 74867 | Oil Operator | May 2013 |
| 17290 | Lewis Oil & Gas Of Galva, Inc. | Galva, KS 67443 | Oil Operator | Dec 2024 |
| 17291 | Lewis Oil And Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 17292 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Jan 2025 |
| 17293 | Lewis Oil Operations LLC | Ratliff City, OK 73481 | Oil & Gas Operator | Jan 2025 |
| 17294 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Apr 2025 |
| 17295 | Lewis Petro Properties, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2025 |
| 17296 | Lewis Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 1995 |
| 17297 | Lewis Williams | | Oil & Gas Operator | Feb 1991 |
| 17298 | Lewis Yale H | | Oil & Gas Operator | Aug 1986 |
| 17299 | Lewis, Beverly J | | Oil Operator | Nov 2024 |
| 17300 | Lewis, Bryan | Andover, NY 14806 | Oil & Gas Operator | Dec 2023 |