| 16201 | Landmark Venture Group No. 1, Inc. | | Oil & Gas Operator | Jan 2025 |
| 16202 | Landmark Venture Group, Inc. | | Oil Operator | Dec 2008 |
| 16203 | Landmaster Partners, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Jun 2026 |
| 16204 | Landmen Of Texas | Hondo, TX 78861 | Oil Operator | Feb 2007 |
| 16205 | Landmen Of Texas, Inc. | Hondo, TX 78861 | Oil Operator | Dec 2016 |
| 16206 | Landor Oil Co. | San Marcos, TX 78666 | Oil Operator | Jun 2026 |
| 16207 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 16208 | Landprovest Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1993 |
| 16209 | Landreth, Robert E. | Midland, TX 79701 | Oil & Gas Operator | Jun 2026 |
| 16210 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Jun 2026 |
| 16211 | Landrum Petroleum Co., Inc. | Burkburnett, TX 76354 | Oil Operator | Mar 2008 |
| 16212 | Landrum West, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 1997 |
| 16213 | Landrum, W. A. | Byers, TX 76357 | Oil & Gas Operator | Apr 2002 |
| 16214 | Lane Oil Company, LLC | Northern Cambria, PA 15714 | Oil Operator | Dec 2024 |
| 16215 | Lane Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 2026 |
| 16216 | Lane, Lloyd L. | Buffalo, TX 75831 | Oil Operator | Jun 2026 |
| 16217 | Laneer Resources Company | Abilene, TX 79608 | Oil & Gas Operator | Jun 2026 |
| 16218 | Lanexco, Inc. | Sealy, TX 77474 | Oil & Gas Operator | Jun 2026 |
| 16219 | Lanford Drilling Co., Inc. | | Oil Operator | Jun 1996 |
| 16220 | Lang Larry D | Beverly, OH 45715 | Oil & Gas Operator | Dec 2025 |
| 16221 | Lang, Herman - Marital Trust | Garden City, KS 67846 | Oil & Gas Operator | Feb 2026 |
| 16222 | Lang, Kenneth R. | Garden City, KS 67846 | Oil & Gas Operator | Feb 2026 |
| 16223 | Langasco Energy Corp | Alliance, OH 44601 | Oil & Gas Operator | Dec 1987 |
| 16224 | Langford & Brigham Operating LLC | Austin, TX 78730 | Oil & Gas Operator | Jun 2026 |
| 16225 | Langford Production Company, LLC | Haskell, TX 79521 | Oil & Gas Operator | Jun 2026 |
| 16226 | Langford, G. E. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2002 |
| 16227 | Langford, R. C. Operating Co. | Rule, TX 79547 | Oil & Gas Operator | Mar 1994 |
| 16228 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 16229 | Langley Energy | Euless, TX 76040 | Gas Operator | Jan 2016 |
| 16230 | Langley Harold | Graham, OK 73437 | Oil Operator | Feb 2026 |
| 16231 | Langley, James Operating Company, Inc | Smackover, AR 71762 | Oil & Gas Operator | Jan 2025 |
| 16232 | Langley, Jerry Oil Company LLC | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 16233 | Langston Oil & Gas LLC | Wichita, KS 67202 | Oil Operator | Nov 2025 |
| 16234 | Lankford & Nance | | Gas Operator | Dec 2010 |
| 16235 | Lankford Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1999 |
| 16236 | Lankford, Dan L. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 16237 | Lanmarc Resources | | Oil Operator | Dec 2003 |
| 16238 | Lanoco, Inc. | | Oil & Gas Operator | Sep 2002 |
| 16239 | Lansden Operating Co LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 1997 |
| 16240 | Lansing Energy C | | Oil Operator | Jun 2006 |
| 16241 | Lansing Energy Operations | Wichita, KS 67202 | Oil Operator | Apr 2010 |
| 16242 | Lap Energy Solutions LLC | Harper, TX 78631 | Oil Operator | Jun 2026 |
| 16243 | Lapco Oil & Gas Company | Houston, TX 77069 | Oil & Gas Operator | Oct 2015 |
| 16244 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Aug 2024 |
| 16245 | Lapis Operating, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jul 2015 |
| 16246 | Lappin Oil LLC | Douglas, WY 82633 | Oil & Gas Operator | Apr 2026 |
| 16247 | Laquey, E. C. | Refugio, TX 78377 | Oil & Gas Operator | Aug 2003 |
| 16248 | Lar-Mie Petroleum Inc | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1998 |
| 16249 | Larae Operations | Luling, TX 78648 | Oil Operator | Jun 2026 |
| 16250 | Laran Operating LLC | Dover, OK 73734-0057 | Oil & Gas Operator | Mar 2015 |
| 16251 | Larance Engineering Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Jan 1996 |
| 16252 | Larch Oil & Gas Corporation | Cross Lanes, WV 25313 | Oil & Gas Operator | Dec 2021 |
| 16253 | Larco Drilling & Exploration Corp. | | Oil & Gas Operator | Dec 1999 |
| 16254 | Larcom Mike | | Oil Operator | Feb 1987 |
| 16255 | Lardo, Anthony P. Jr. | Lakeview, NY 14085 | Gas Operator | Dec 2024 |
| 16256 | Laredo Energy | Houston, TX 77002 | Oil & Gas Operator | Jun 2016 |
| 16257 | Laredo Energy Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2022 |
| 16258 | Laredo Energy, LP | Houston, TX 77040 | Oil & Gas Operator | Oct 2003 |
| 16259 | Laredo Petroleum - Dallas, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2014 |
| 16260 | Laredo Petroleum, Inc. | Tulsa, OK 74120 | Oil & Gas Operator | Mar 2023 |
| 16261 | Large Operating LLC | Stinnett, TX 79083 | Oil & Gas Operator | Jun 2026 |
| 16262 | Large, William C. & Mary B. | Union Springs, NY 13160 | Gas Operator | Dec 2024 |
| 16263 | Largo Oil Company | Longview, TX 75606 | Oil & Gas Operator | Jun 2026 |
| 16264 | Lariat Energy & Supply Co Inc | Hulbert, OK 74441 | Oil & Gas Operator | Feb 2026 |
| 16265 | Lariat Land & Exploration, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Jun 2026 |
| 16266 | Lariat Petroleum Inc | Tulsa, OK 74119 | Oil & Gas Operator | Sep 2024 |
| 16267 | Lariat Resources, LLC | Fort Worth, TX 76132 | Oil & Gas Operator | May 2022 |
| 16268 | Lario Oil & Gas | | Oil & Gas Operator | Nov 1995 |
| 16269 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Jun 2026 |
| 16270 | Larison Oil Company | Katy, TX 77494 | Oil & Gas Operator | Jun 2026 |
| 16271 | Lark Production, Inc. | | Oil & Gas Operator | Mar 2023 |
| 16272 | Larkin Energy Company Inc | Sasakwa, OK 74867 | Oil & Gas Operator | May 2022 |
| 16273 | Larkin Oil Co | Sasakwa, OK 74867 | Oil & Gas Operator | Aug 2015 |
| 16274 | Larkspur Operating LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Feb 2026 |
| 16275 | Larmore Jr James E | Bartlesville, OK 74006-8312 | Oil Operator | Mar 2017 |
| 16276 | Laroca Resources, LTD | Austin, TX 78709 | Oil & Gas Operator | Jun 2026 |
| 16277 | Laroco LLP | Woodsboro, TX 78393 | Oil & Gas Operator | Mar 2008 |
| 16278 | Laron Oil Corporation | Seguin, TX 78155 | Oil & Gas Operator | Jul 1997 |
| 16279 | Larrette Resources | | Oil Operator | Nov 1999 |
| 16280 | Larron Energy Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2015 |
| 16281 | Larry A And Patricia D Jeter | Lovington, NM 88260 | Oil & Gas Operator | Apr 2000 |
| 16282 | Larry Brown Dba Brown Oil Company | Ardmore, OK 73401 | Oil Operator | Apr 2015 |
| 16283 | Larry E. Bedrosian | | Oil Operator | Dec 1999 |
| 16284 | Larry H Wright Inc | Naples, FL 34108-2156 | Oil & Gas Operator | Dec 1993 |
| 16285 | Larry Marker Dba Marker Oil | Roswell, NM 88202 | Oil & Gas Operator | Jul 2017 |
| 16286 | Larry Oil, Inc. | Albany, TX 76430 | Oil & Gas Operator | Nov 2001 |
| 16287 | Larry Sherman Oil LLC | Chandler, OK 74834 | Oil & Gas Operator | Mar 2026 |
| 16288 | Larry Wolff Dba Wolff'S Oilfield Service | Cushing, OK 74023-9789 | Oil & Gas Operator | Feb 2026 |
| 16289 | Larson Buford | | Oil Operator | May 2006 |
| 16290 | Larson Drilling Corp. | Jamestown, NY 14702 | Gas Operator | Dec 2024 |
| 16291 | Larson Exploration Company | Tulsa, OK 74136-4939 | Oil & Gas Operator | Jul 2016 |
| 16292 | Larson Operating | | Oil & Gas Operator | Mar 2001 |
| 16293 | Larson Operating Company | Olmitz, KS 67564-8561 | Oil & Gas Operator | Dec 2019 |
| 16294 | Larson, Perry L Operating Co Inc | Dallas, TX 75382 | Oil & Gas Operator | Feb 2021 |
| 16295 | Las Animas Production Company | Midland, TX 79705 | Oil & Gas Operator | Mar 1995 |
| 16296 | Las Colinas Oil Corp. | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 16297 | Las Palmas Petroleum Corp. | | Oil Operator | Dec 2010 |
| 16298 | Las Services, Inc. | | Oil & Gas Operator | Oct 1997 |
| 16299 | Lasalle Marine Corporation | Houston, TX 77056 | Oil Operator | Aug 2003 |
| 16300 | Lasater & Co, Inc. | Spearman, TX 79081 | Oil & Gas Operator | Jun 2026 |