| 16201 | Lampert Exploration Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 16202 | Lamson Petroleum Corporation | | Oil & Gas Operator | Mar 1993 |
| 16203 | Lamson/Crocker Petroleum Corp. | | Oil & Gas Operator | May 1988 |
| 16204 | Lamson/Onshore Petroleum Corp. | | Oil & Gas Operator | Sep 1985 |
| 16205 | Lan Ma'S Oil And Gas LLC | Sugar Land, TX 77479 | Oil Operator | Dec 2025 |
| 16206 | Lancaster, Randy L. Dba Heritage Oil & Gas | Middlebourne, WV 26149 | Oil & Gas Operator | Dec 2021 |
| 16207 | Lance Exploration Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1994 |
| 16208 | Lance Gas & Oil Productions | | Oil & Gas Operator | Jan 2025 |
| 16209 | Lance Leasing | Odessa, TX 79765 | Oil Operator | Sep 2026 |
| 16210 | Lance Oil & Gas Company Inc | Kirtland, NM 87417 | Oil & Gas Operator | Mar 2013 |
| 16211 | Lance Oil & Gas Productions | Bloomburg, TX 75556 | Oil & Gas Operator | Sep 2026 |
| 16212 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Jun 2026 |
| 16213 | Lancer Energy Corporation | Oklahoma City, OK 73132-5903 | Oil & Gas Operator | May 2015 |
| 16214 | Lancer Oil, Inc. | Piqua, KS 66761 | Oil Operator | May 2005 |
| 16215 | Lancer Petroleum Corporation | Irving, TX 75014 | Oil & Gas Operator | Feb 2014 |
| 16216 | Lancer Resources Company | | Oil & Gas Operator | Jan 1998 |
| 16217 | Lanco Oil & Gas, Inc. | Richland, TX 76681 | Oil & Gas Operator | Jan 1998 |
| 16218 | Land & Natural Res. Dev., Inc. | | Oil & Gas Operator | Apr 2007 |
| 16219 | Land And Natural Resource Development, Inc. | Northport, AL 35473 | Oil & Gas Operator | Jun 2026 |
| 16220 | Land, Cleatus H. Estate | Seguin, TX 78155 | Oil & Gas Operator | Mar 2001 |
| 16221 | Landaplenty, LLC | Glenville, WV 26351 | Oil & Gas Operator | Dec 2021 |
| 16222 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 16223 | Landers & Musgrove Oil Co. Inc | Okemah, OK 74859-0266 | Oil & Gas Operator | Jan 2018 |
| 16224 | Landers & Waldman Inc | Okemah, OK 74859-0660 | Oil & Gas Operator | May 2013 |
| 16225 | Landers Oil & Gas Inc | Tulsa, OK 74132-2171 | Oil & Gas Operator | Apr 2026 |
| 16226 | Landers Production Company | Granite, OK 73547-0093 | Oil Operator | Apr 2014 |
| 16227 | Landes Explorati | | Oil Operator | Apr 1995 |
| 16228 | Landes, P. Todd, Jr. | Magnolia, AR 71753 | Oil Operator | Apr 1988 |
| 16229 | Landis, Andrew J. And Athanasia | Fredonia, NY 14063 | Gas Operator | Dec 2025 |
| 16230 | Landmark 4 LLC | Dalton, OH 44618-1111 | Oil & Gas Operator | Dec 2025 |
| 16231 | Landmark Drilling, L.L.C. | Waskom, TX 75692 | Oil Operator | Sep 2026 |
| 16232 | Landmark Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | Jun 2026 |
| 16233 | Landmark Energy Partners, LLC | Edmond, OK 73013 | Oil Operator | Jun 2026 |
| 16234 | Landmark Exploration Co | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2013 |
| 16235 | Landmark Exploration Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Sep 2026 |
| 16236 | Landmark Ip, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 16237 | Landmark Oil & G | | Oil Operator | Nov 1987 |
| 16238 | Landmark Oil Exp | | Oil Operator | Sep 1994 |
| 16239 | Landmark Operating Company | Welty, OK 74833-3923 | Oil Operator | Aug 2015 |
| 16240 | Landmark Production Company | MC Gregor, TX 76657 | Oil & Gas Operator | Oct 2010 |
| 16241 | Landmark Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Apr 2026 |
| 16242 | Landmark Venture Group No. 1, Inc. | | Oil & Gas Operator | Jan 2025 |
| 16243 | Landmark Venture Group, Inc. | | Oil Operator | Dec 2008 |
| 16244 | Landmaster Partners, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Sep 2026 |
| 16245 | Landmen Of Texas | Hondo, TX 78861 | Oil Operator | Feb 2007 |
| 16246 | Landmen Of Texas, Inc. | Hondo, TX 78861 | Oil Operator | Dec 2016 |
| 16247 | Landor Oil Co. | San Marcos, TX 78666 | Oil Operator | Sep 2026 |
| 16248 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 16249 | Landprovest Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1993 |
| 16250 | Landreth, Robert E. | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 16251 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2026 |
| 16252 | Landrum Petroleum Co., Inc. | Burkburnett, TX 76354 | Oil Operator | Mar 2008 |
| 16253 | Landrum West, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 1997 |
| 16254 | Landrum, W. A. | Byers, TX 76357 | Oil & Gas Operator | Apr 2002 |
| 16255 | Lane Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2026 |
| 16256 | Lane, Lloyd L. | Buffalo, TX 75831 | Oil Operator | Sep 2026 |
| 16257 | Laneer Resources Company | Abilene, TX 79608 | Oil & Gas Operator | Sep 2026 |
| 16258 | Lanexco, Inc. | Sealy, TX 77474 | Oil & Gas Operator | Sep 2026 |
| 16259 | Lanford Drilling Co., Inc. | | Oil Operator | Jun 1996 |
| 16260 | Lang Herman Oil | | Oil & Gas Operator | Dec 1996 |
| 16261 | Lang Larry D | Beverly, OH 45715 | Oil & Gas Operator | Dec 2025 |
| 16262 | Lang, Herman - Marital Trust | Garden City, KS 67846 | Oil & Gas Operator | Apr 2026 |
| 16263 | Lang, Kenneth R. | Garden City, KS 67846 | Oil & Gas Operator | Apr 2026 |
| 16264 | Langasco Energy Corp | Alliance, OH 44601 | Oil & Gas Operator | Dec 1987 |
| 16265 | Langford & Brigham Operating LLC | Austin, TX 78730 | Oil & Gas Operator | Sep 2026 |
| 16266 | Langford Production Company, LLC | Haskell, TX 79521 | Oil & Gas Operator | Sep 2026 |
| 16267 | Langford, G. E. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2002 |
| 16268 | Langford, R. C. Operating Co. | Rule, TX 79547 | Oil & Gas Operator | Mar 1994 |
| 16269 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 16270 | Langley Energy | Euless, TX 76040 | Gas Operator | Jan 2016 |
| 16271 | Langley Harold | Graham, OK 73437 | Oil Operator | Apr 2026 |
| 16272 | Langley, James Operating Company, Inc | Smackover, AR 71762 | Oil & Gas Operator | Jan 2025 |
| 16273 | Langley, Jerry Oil Company LLC | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 16274 | Langston Oil & Gas LLC | Wichita, KS 67202 | Oil Operator | Apr 2026 |
| 16275 | Lankford & Nance | | Gas Operator | Dec 2010 |
| 16276 | Lankford Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1999 |
| 16277 | Lankford, Dan L. | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 16278 | Lanmarc Resources | | Oil Operator | Dec 2003 |
| 16279 | Lanoco, Inc. | | Oil & Gas Operator | Sep 2002 |
| 16280 | Lansden Operating Co LLC | Norman, OK 73070 | Oil & Gas Operator | Dec 1997 |
| 16281 | Lansing Energy C | | Oil Operator | Jun 2006 |
| 16282 | Lansing Energy Operations | Wichita, KS 67202 | Oil Operator | Apr 2010 |
| 16283 | Lap Energy Solutions LLC | Harper, TX 78631 | Oil Operator | Sep 2026 |
| 16284 | Lapco Oil & Gas Company | Houston, TX 77069 | Oil & Gas Operator | Oct 2015 |
| 16285 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Aug 2024 |
| 16286 | Lapis Operating, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jul 2015 |
| 16287 | Lappin Oil LLC | Douglas, WY 82633 | Oil & Gas Operator | Aug 2026 |
| 16288 | Laquey, E. C. | Refugio, TX 78377 | Oil & Gas Operator | Aug 2003 |
| 16289 | Lar-Mie Petroleum Inc | Tulsa, OK 74136 | Oil & Gas Operator | Aug 1998 |
| 16290 | Larae Operations | Corpus Christ, TX 78413 | Oil Operator | Sep 2026 |
| 16291 | Laran Operating LLC | Dover, OK 73734-0057 | Oil & Gas Operator | Mar 2015 |
| 16292 | Larance Engineering Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Jan 1996 |
| 16293 | Larch Oil & Gas Corporation | Cross Lanes, WV 25313 | Oil & Gas Operator | Dec 2021 |
| 16294 | Larco Drilling & Exploration Corp. | | Oil & Gas Operator | Dec 1999 |
| 16295 | Larcom Mike | | Oil Operator | Feb 1987 |
| 16296 | Lardo, Anthony P. Jr. | Lakeview, NY 14085 | Gas Operator | Dec 2025 |
| 16297 | Laredo Energy | Houston, TX 77002 | Oil & Gas Operator | Jun 2016 |
| 16298 | Laredo Energy Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Nov 2022 |
| 16299 | Laredo Energy V, LP | Houston, TX 77024 | Oil & Gas Operator | Apr 2014 |
| 16300 | Laredo Energy, LP | Houston, TX 77040 | Oil & Gas Operator | Oct 2003 |