| 201 | Lainco Well Service, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Aug 2011 |
| 202 | Lainco, Inc. | Hamlin, TX 79520 | Oil & Gas Operator | Apr 2025 |
| 203 | Laird Anita Louise | Asher, OK 74826-3215 | Oil Operator | Jun 2018 |
| 204 | Laird Bill Oil Company | St Louis, OK 74866 | Oil & Gas Operator | Jan 2025 |
| 205 | Lake A, LTD. | | Oil Operator | May 1998 |
| 206 | Lake Country Disposal II LLC | Wilson, OK 73463 | Oil Operator | Jan 2025 |
| 207 | Lake Country Disposal LLC | Ardmore, OK 73401 | Oil Operator | Oct 2024 |
| 208 | Lake Crystal Operating LLC | Sugar Land, TX 77496 | Oil & Gas Operator | Apr 2025 |
| 209 | Lake Energy LLC | Chagrin Falls, OH 44023 | Oil & Gas Operator | Dec 2024 |
| 210 | Lake Erie Energy Part LLC | Erie, PA 16505-4760 | Oil & Gas Operator | Dec 2012 |
| 211 | Lake Racourci Gath Sys, LLC | | Oil Operator | May 2004 |
| 212 | Lake Region Oil Inc | Massillon, OH 44648 | Oil & Gas Operator | Dec 2024 |
| 213 | Lake Ronel Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Jul 2017 |
| 214 | Lakehills Production, Inc. | Austin, TX 78701 | Oil & Gas Operator | Apr 2025 |
| 215 | Lakeland Pipeline Inc | Hominy, OK 74035-1006 | Oil & Gas Operator | Jun 2023 |
| 216 | Lakes And Country Realty LLC | | Oil Operator | Mar 2015 |
| 217 | Lakeshore Operating, LLC | Wichita, KS 67203 | Oil & Gas Operator | Apr 2025 |
| 218 | Lakeshore Petroleum Corp. | | Oil & Gas Operator | Dec 1992 |
| 219 | Lakeside Resources | | Oil & Gas Operator | Mar 1989 |
| 220 | Lakewood Disposal LLC | Tulsa, OK 74136-1031 | Oil Operator | Aug 2018 |
| 221 | Lakewood Energy LLC | Dallas, TX 75214 | Oil & Gas Operator | Apr 2025 |
| 222 | Lakewood Energy Solutions LLC | Tulsa, OK 74136 | Oil Operator | Jun 2016 |
| 223 | Lakewood Oil Company LLC | Mission Hills, KS 66208-2735 | Oil & Gas Operator | May 2013 |
| 224 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 225 | Lakewood Petroleum | | Oil & Gas Operator | Sep 1993 |
| 226 | Lakota Energy, LTD. | Paradise, TX 76073 | Oil & Gas Operator | Apr 2025 |
| 227 | Lakota Oil & Gas | Comanche, OK 73529-9602 | Oil & Gas Operator | May 2014 |
| 228 | Lakota Partnership | Denver, CO 80202 | Oil Operator | Oct 1990 |
| 229 | Laloc | Aspermont, TX 79502 | Oil & Gas Operator | Apr 2025 |
| 230 | Lam Financial Holdings LTD | Denver, CO 80237 | Oil Operator | Feb 2025 |
| 231 | Lama Energy, L.L.C. | Midland, TX 79710 | Oil & Gas Operator | May 2024 |
| 232 | Lamamco Drilling Company | Skiatook, OK 74070 | Oil & Gas Operator | Jan 2025 |
| 233 | Lamar Energy | Nocona, TX 76255 | Oil Operator | Apr 2025 |
| 234 | Lamar Energy LLC | | Oil & Gas Operator | Jan 2025 |
| 235 | Lamar Exploration Corp | Orchard Park, NY 14217 | Gas Operator | Dec 1998 |
| 236 | Lamar Hunt | | Oil & Gas Operator | Oct 2003 |
| 237 | Lamar Hunt Trust Est Etal | | Oil & Gas Operator | Aug 1996 |
| 238 | Lamar Hunt Trust Est. | | Oil & Gas Operator | Mar 1978 |
| 239 | Lamar Matlock | | Oil Operator | Jan 2025 |
| 240 | Lamar Oil & Gas Co., Inc. | | Oil & Gas Operator | Dec 2021 |
| 241 | Lamar Oil & Gas Exploration | | Gas Operator | Oct 2013 |
| 242 | Lamar Oil & Gas, Inc. | Rockport, TX 78381 | Oil & Gas Operator | Apr 2025 |
| 243 | Lamar Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Oct 2015 |
| 244 | Lamar Properties | Evansville, IN 47716 | Gas Operator | Dec 2023 |
| 245 | Lamar Smith | | Oil Operator | Aug 1991 |
| 246 | Lamarsa Corp. | Cut Bank, MT 59427 | Oil & Gas Operator | Jan 2025 |
| 247 | Lamay Corporation | Rosenberg, TX 77471 | Oil & Gas Operator | Apr 2025 |
| 248 | Lamb & Mize | Azle, TX 76020 | Oil & Gas Operator | Apr 2025 |
| 249 | Lamb Alan L | Oklahoma City, OK 73120-7824 | Oil & Gas Operator | Feb 2020 |
| 250 | Lamb, James L., Jr. | Austin, TX 78750 | Oil & Gas Operator | Mar 2016 |
| 251 | Lamb, William Michael | Smithville, WV 26178 | Oil & Gas Operator | Dec 2021 |
| 252 | Lambda Energy Resources LLC | | Oil & Gas Operator | Mar 2025 |
| 253 | Lambdin William H | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 1998 |
| 254 | Lambeck Petroleum, LLC | Stockdale, TX 78160 | Oil Operator | Apr 2025 |
| 255 | Lamberd, Clayton | Olathe, KS 66061 | Oil Operator | Oct 2024 |
| 256 | Lambert Company LLC | Healdton, OK 73438-0962 | Oil & Gas Operator | Jan 2025 |
| 257 | Lambert Company The | Healdton, OK 73438-0962 | Oil & Gas Operator | Feb 2023 |
| 258 | Lambert Oil & Gas LLC | Holdenville, OK 74848-4707 | Oil & Gas Operator | Nov 2024 |
| 259 | Lamberton Oil Co Inc | Tulsa, OK 74107 | Oil & Gas Operator | May 2013 |
| 260 | Lamberton W J | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2015 |
| 261 | Lamco Oil, LLC | Nocona, TX 76255 | Oil & Gas Operator | Apr 2025 |
| 262 | Lamesa Crude | Abilene, TX 79605 | Oil & Gas Operator | Feb 2015 |
| 263 | Lamima Corporation | Ardmore, OK 73401 | Oil Operator | Nov 1994 |
| 264 | Lamkin Oil Company | Stephens, AR 71764 | Oil Operator | Jul 2024 |
| 265 | Laml Compaines LLC | Cleveland, OK 74020 | Oil Operator | Jan 2025 |
| 266 | Lammerts Robert P | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2002 |
| 267 | Lampert Exploration Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 268 | Lamson Petroleum Corporation | | Oil & Gas Operator | Mar 1993 |
| 269 | Lamson/Crocker Petroleum Corp. | | Oil & Gas Operator | May 1988 |
| 270 | Lamson/Onshore Petroleum Corp. | | Oil & Gas Operator | Sep 1985 |
| 271 | Lan Ma'S Oil And Gas LLC | Sugar Land, TX 77479 | Oil Operator | Feb 2025 |
| 272 | Lancaster, Randy L. Dba Heritage Oil & Gas | Middlebourne, WV 26149 | Oil & Gas Operator | Dec 2021 |
| 273 | Lance Exploration Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1994 |
| 274 | Lance Gas & Oil Productions | | Oil & Gas Operator | Jan 2025 |
| 275 | Lance Leasing | Odessa, TX 79765 | Oil Operator | Apr 2025 |
| 276 | Lance Oil & Gas Company Inc | Kirtland, NM 87417 | Oil & Gas Operator | Mar 2013 |
| 277 | Lance Oil & Gas Productions | Bloomburg, TX 75556 | Oil & Gas Operator | Apr 2025 |
| 278 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Feb 2025 |
| 279 | Lancer Energy Corporation | Oklahoma City, OK 73132-5903 | Oil & Gas Operator | May 2015 |
| 280 | Lancer Oil, Inc. | Piqua, KS 66761 | Oil Operator | May 2005 |
| 281 | Lancer Petroleum Corporation | Irving, TX 75014 | Oil & Gas Operator | Feb 2014 |
| 282 | Lancer Resources Company | | Oil & Gas Operator | Jan 1998 |
| 283 | Lanco Oil & Gas, Inc. | Richland, TX 76681 | Oil & Gas Operator | Jan 1998 |
| 284 | Land & Natural Res. Dev., Inc. | | Oil & Gas Operator | Apr 2007 |
| 285 | Land And Natural Resource Development, Inc. | Northport, AL 35473 | Oil & Gas Operator | Feb 2025 |
| 286 | Land, Cleatus H. Estate | Seguin, TX 78155 | Oil & Gas Operator | Mar 2001 |
| 287 | Landaplenty, LLC | Glenville, WV 26351 | Oil & Gas Operator | Dec 2021 |
| 288 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 289 | Landers & Musgrove Oil Co. Inc | Okemah, OK 74859-0266 | Oil & Gas Operator | Jan 2018 |
| 290 | Landers & Waldman Inc | Okemah, OK 74859-0660 | Oil & Gas Operator | May 2013 |
| 291 | Landers Oil & Gas Inc | Tulsa, OK 74132-2171 | Oil & Gas Operator | Jan 2025 |
| 292 | Landers Production Company | Granite, OK 73547-0093 | Oil Operator | Apr 2014 |
| 293 | Landes Explorati | | Oil Operator | Apr 1995 |
| 294 | Landes, P. Todd, Jr. | Magnolia, AR 71753 | Oil Operator | Apr 1988 |
| 295 | Landis, Andrew J. And Athanasia | Fredonia, NY 14063 | Gas Operator | Dec 2023 |
| 296 | Landmark 4 LLC | Dalton, OH 44618-1111 | Oil & Gas Operator | Dec 2024 |
| 297 | Landmark Drilling, L.L.C. | Waskom, TX 75692 | Oil Operator | Apr 2025 |
| 298 | Landmark Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | Feb 2025 |
| 299 | Landmark Energy Partners, LLC | Edmond, OK 73013 | Oil Operator | Mar 2025 |
| 300 | Landmark Exploration Co | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2013 |