| 201 | Lobar Oil Co LLC | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 202 | Lobo Energy, Inc. | Laredo, TX 78044 | Oil & Gas Operator | Nov 1996 |
| 203 | Lobo Exploration Company | Yukon, OK 73099 | Oil & Gas Operator | May 2025 |
| 204 | Lobo Petroleum Inc | Guymon, OK 73942-0714 | Oil Operator | Jul 2016 |
| 205 | Locators Oil And Gas Inc | Guthrie, OK 73044 | Oil & Gas Operator | Oct 2022 |
| 206 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | Aug 2025 |
| 207 | Locke Stock & Barrel Res Inc | Calgary, AB T2P3G | Oil Operator | Nov 1998 |
| 208 | Loco Oil Company | Loco, OK 73442 | Oil Operator | Feb 1993 |
| 209 | Lodestone Operating, Inc. | Portland, TX 78374 | Oil & Gas Operator | Aug 2025 |
| 210 | Logan Productions LLC | Wewoka, OK 74884 | Oil Operator | May 2025 |
| 211 | Loki Oil LLC | Cushing, OK 74023 | Oil & Gas Operator | Nov 2024 |
| 212 | Loman Linda Gann | Norman, OK 73069-6548 | Oil Operator | Apr 2011 |
| 213 | London William W | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2015 |
| 214 | London William W Inc | Oklahoma City, OK 73116-5116 | Oil & Gas Operator | Apr 2016 |
| 215 | Lone Star Resources Company | Keyes, OK 73947 | Oil & Gas Operator | Mar 2015 |
| 216 | Lone Tree Oil & Gas LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2025 |
| 217 | Long Engineering Company Inc | Oklahoma City, OK 73112-7769 | Oil Operator | Jun 2008 |
| 218 | Long George L | San Antonio, TX 78209 | Oil & Gas Operator | Feb 1996 |
| 219 | Long Production LLC | Claremore, OK 74017-2808 | Oil & Gas Operator | Oct 2019 |
| 220 | Long Resources Inc | Austin, TX 78730 | Oil & Gas Operator | Jun 2025 |
| 221 | Long Royalty Company | Yukon, OK 73085 | Oil & Gas Operator | Jan 2004 |
| 222 | Long, James A | | Oil Operator | Aug 2000 |
| 223 | Long, John P | | Oil & Gas Operator | May 2025 |
| 224 | Longacre Oil & Gas | Enid, OK 73702 | Oil & Gas Operator | Mar 2013 |
| 225 | Longberry Energy Inc | Keota, OK 74941 | Gas Operator | Jun 2025 |
| 226 | Longbranch Oil Company | Oklahoma City, OK 73154-0735 | Oil & Gas Operator | Mar 2018 |
| 227 | Longfellow Energy, LP | Dallas, TX 75225 | Oil & Gas Operator | Aug 2025 |
| 228 | Longhorn Estates & Cattle Co. LLC | Jennings, OK 74038 | Oil Operator | May 2025 |
| 229 | Longhurst Oil & Gas Inc | | Oil & Gas Operator | Nov 2013 |
| 230 | Longview Production Company | Dallas, TX 75243-3795 | Oil & Gas Operator | May 2025 |
| 231 | Lord Enterprises Inc | Oklahoma City, OK 73106-5050 | Oil & Gas Operator | Sep 2000 |
| 232 | Lorentz Oil & Gas LLC | Edmond, OK 73034-7266 | Oil & Gas Operator | May 2025 |
| 233 | Loto Energy LLC | Saint Louis, MO 63105 | Oil & Gas Operator | May 2025 |
| 234 | Lou Dennis Oil Company Inc | Ada, OK 74820-2303 | Oil & Gas Operator | Jun 2016 |
| 235 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 236 | Lovell Keith | Stillwater, OK 74074-6459 | Oil & Gas Operator | Jan 2020 |
| 237 | Loving Company (The) | Broken Arrow, OK 74014-0001 | Oil & Gas Operator | May 2013 |
| 238 | Lowe Kenneth | Jennings, OK 74038 | Oil & Gas Operator | May 2025 |
| 239 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jun 2025 |
| 240 | Loyalty Production, LLC | Marlow, OK 73055 | Oil Operator | May 2025 |
| 241 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2025 |
| 242 | Lre Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2016 |
| 243 | LRR IV Operating Inc | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 244 | LTJ Enterprises LLC | Lone Grove, OK 73443 | Oil & Gas Operator | May 2025 |
| 245 | Lu-Ray Petroleum LLC | Oklahoma City, OK 73121-1607 | Oil & Gas Operator | Jun 2025 |
| 246 | Lubell Oil Company | Tulsa, OK 74103 | Gas Operator | Jul 1993 |
| 247 | Lucky Ace Petroleum LLC | Carrollton, TX 75010-4232 | Oil Operator | Oct 2021 |
| 248 | Lucky Four Oil & Gas Company | Sasakwa, OK 74867 | Oil & Gas Operator | Jun 2025 |
| 249 | Lucky Oil Company | Comanche, OK 73529-0009 | Oil Operator | Dec 2024 |
| 250 | Lucre Oil Company | Muskogee, OK 74401-5099 | Oil & Gas Operator | Jun 2019 |
| 251 | Luke Oil Company | Bristow, OK 74010 | Oil & Gas Operator | Jun 2025 |
| 252 | Lunar Investments Inc | Oklahoma City, OK 73118-4823 | Oil & Gas Operator | May 2025 |
| 253 | Luther Oil Inc | Cameron Park, CA 95682-8865 | Oil & Gas Operator | Apr 2020 |
| 254 | Luween Energy LLC | Oklahoma City, OK 73128 | Oil & Gas Operator | May 2025 |
| 255 | Lvi Enterprises Trust | Plano, TX 75093-7789 | Oil & Gas Operator | Nov 2014 |
| 256 | LVM Oil Production LLC | Yale, OK 74085-6688 | Oil & Gas Operator | Jul 2021 |
| 257 | LX4, LLC | Laverne, OK 73848 | Oil Operator | Jun 2025 |
| 258 | LXS Inc | Stigler, OK 74462-0506 | Gas Operator | Nov 2013 |
| 259 | Lyda Gerald SR X Bar Ranch | San Antonio, TX 78268-0907 | Oil & Gas Operator | Feb 1994 |
| 260 | Lynan Energy Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 2013 |
| 261 | Lynn William R | Pawhuska, OK 74056 | Oil & Gas Operator | May 2013 |
| 262 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
| 263 | Lynx Oklahoma Operating LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | May 2025 |
| 264 | Lynx Operating Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2025 |
| 265 | Lyon Energy, Inc. | Plano, TX 75075 | Oil & Gas Operator | Feb 2000 |
| 266 | Lyon Hoyle | Sasakwa, OK 74867 | Oil Operator | Feb 2025 |
| 267 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | May 2025 |
| 268 | Lyric Energy, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 1996 |