| 201 | Exl Petroleum, LP | Midland, TX 79705 | Oil & Gas Operator | Jun 2017 |
| 202 | Extex Operating Company | Houston, TX 77057 | Oil & Gas Operator | Apr 2025 |
| 203 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jun 2024 |
| 204 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2025 |
| 205 | Fair Oil, LTD. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2025 |
| 206 | Famcor Oil, Inc. | Scottsdale, AZ 85260 | Oil & Gas Operator | Sep 2020 |
| 207 | Fasken Oil And Ranch, LTD. | Midland, TX 79707 | Oil & Gas Operator | Apr 2025 |
| 208 | Fasken, Barbara | Midland, TX 79701 | Oil & Gas Operator | Dec 1995 |
| 209 | FDL Operating, LLC | Judson, TX 75660 | Oil & Gas Operator | Apr 2025 |
| 210 | Finley Resources Inc | Fort Worth, TX 76113 | Oil & Gas Operator | Apr 2025 |
| 211 | Firebird Energy II LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2025 |
| 212 | Firebird Energy LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2022 |
| 213 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Apr 2025 |
| 214 | Fletcher Petroleum Corp. | Fairhope, AL 36533 | Oil & Gas Operator | Feb 2025 |
| 215 | Floyd, Timber Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 216 | Forest Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 217 | Forest Oil Permian Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 218 | Fourpoint Energy, LLC | Denver, CO 80206 | Oil & Gas Operator | Apr 2025 |
| 219 | Frontier Gas Operating Corp. | Houston, TX 77002 | Oil & Gas Operator | Jul 1998 |
| 220 | Fuel Products, Inc. | Midland, TX 79702 | Oil Operator | Mar 2002 |
| 221 | Fuller Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 1995 |
| 222 | Fuller Production, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 223 | Gap Exploration, LTD. | Naples, FL 34110 | Oil & Gas Operator | Jul 2008 |
| 224 | Gardner Energy Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 1999 |
| 225 | Gco Drilling Company | Midland, TX 79702 | Oil & Gas Operator | Dec 1993 |
| 226 | General Atlantic Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Jan 2022 |
| 227 | Geodyne Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2015 |
| 228 | GHS Energy Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 229 | Gilliam'S Aghorn Energy | Odessa, TX 79768 | Oil & Gas Operator | May 1997 |
| 230 | Golden Specialties Oil & Gas | Midland, TX 79708 | Oil & Gas Operator | Apr 2025 |
| 231 | Gould Energy Co. | Owasso, OK 74055 | Oil & Gas Operator | Mar 2005 |
| 232 | Grace Petroleum LP | Midland, TX 79708 | Oil & Gas Operator | May 2016 |
| 233 | Grace Petroleum Operating, LLC | Llano, TX 78643 | Oil & Gas Operator | Apr 2025 |
| 234 | Graham Royalty LTD | Covington, LA 70434 | Oil & Gas Operator | Jul 2007 |
| 235 | Grand Banks Energy Company | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2025 |
| 236 | Gresham Oil & Gas (USA) Inc. | Littleton, CO 80122 | Oil & Gas Operator | Jan 1999 |
| 237 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 238 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 239 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 240 | GTG Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Apr 2025 |
| 241 | Guidon Energy MGMT Services LLC | Irving, TX 75062 | Oil & Gas Operator | Dec 2020 |
| 242 | Gulfmark Energy Inc | Houston, TX 77027 | Gas Operator | Apr 2023 |
| 243 | H & S Drilling Co Inc | Frazeysburg, OH 43822-0040-0040 | Oil & Gas Operator | Dec 2016 |
| 244 | H L Brown Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2025 |
| 245 | H&M Production, Inc. | New Braunfels, TX 78132 | Oil & Gas Operator | Aug 2012 |
| 246 | Hallwood Energy Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2005 |
| 247 | Hallwood Petroleum, Inc. | Midland, TX 79701 | Oil & Gas Operator | Aug 2024 |
| 248 | Hanley Petroleum Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 249 | Hannathon Petroleum, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 250 | Hanson Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2008 |
| 251 | Harkey Energy Inc. | Odessa, TX 79762 | Oil & Gas Operator | Feb 2020 |
| 252 | Headington Energy Partners, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2025 |
| 253 | Hec Petroleum, Inc | Midland, TX 79705 | Oil & Gas Operator | Mar 2006 |
| 254 | Helmerich & Payne, Inc. | Tulsa, OK 74114 | Oil & Gas Operator | Jan 2025 |
| 255 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 256 | Hendon WM E. Jr. Rev LVNG Trust | Everett, WA 98208 | Oil & Gas Operator | Apr 2025 |
| 257 | Hendrix, John H. Corporation | Midland, TX 79705 | Oil & Gas Operator | Sep 2018 |
| 258 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 259 | Henry Petroleum LP | Midland, TX 79701 | Oil & Gas Operator | Dec 2008 |
| 260 | Henry Resources LLC | Midland, TX 79703 | Oil & Gas Operator | Apr 2025 |
| 261 | Herricks Oil Co. | San Angelo, TX 76906 | Oil & Gas Operator | Jan 2010 |
| 262 | Hexp Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 263 | Hibernia Resources III, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2023 |
| 264 | Hibernia Resources IV, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2025 |
| 265 | Highland Production Company | Midland, TX 79701 | Oil & Gas Operator | Mar 1996 |
| 266 | Highmount Expl & Prod Texas LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2014 |
| 267 | Hill, A G | Dallas, TX 75201 | Oil & Gas Operator | May 2008 |
| 268 | Hillside Oil & Gas, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2016 |
| 269 | HPC Energy LLC | Midland, TX 79703 | Oil & Gas Operator | Aug 2013 |
| 270 | HPPC, Inc. | Midland, TX 79701 | Oil & Gas Operator | Feb 2023 |
| 271 | Hughes, Bob Oil Company | San Angelo, TX 76901 | Oil & Gas Operator | Jul 2011 |
| 272 | Hugoton Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Dec 2019 |
| 273 | Hulsey Larry O & Co | Graham, TX 76046 | Oil & Gas Operator | Jun 2012 |
| 274 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 275 | Hunter Oil & Gas Co. | Bangs, TX 76823 | Oil & Gas Operator | Apr 2025 |
| 276 | Hydrocarbon Management, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | Dec 1996 |
| 277 | I.T. Corporation | Arlington, TX 76016 | Oil & Gas Operator | Apr 2025 |
| 278 | Ikard, Alan | Electra, TX 76360 | Oil & Gas Operator | Apr 2025 |
| 279 | Ip Petroleum Company, Inc. | Houston, TX 77210 | Oil & Gas Operator | Mar 2008 |
| 280 | Ipt Oil Company | Evansville, IN 47706 | Oil & Gas Operator | Apr 2025 |
| 281 | Iron Orchard Operating LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 282 | J D Sutton Inc | Loco, OK 73442-9701 | Oil & Gas Operator | Feb 2025 |
| 283 | J Oil & Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Oct 2016 |
| 284 | Jamex, Inc. | Lewisville, TX 75067 | Oil & Gas Operator | Apr 2025 |
| 285 | Jan Oil Company | Oklahoma City, OK 73156 | Oil & Gas Operator | May 2006 |
| 286 | Jasper Resources, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 1996 |
| 287 | Jatam Inc. | Sterling City, TX 76951 | Oil & Gas Operator | Apr 2025 |
| 288 | Jetta Operating Company Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 289 | JM Cox Resources LP | Midland, TX 79702 | Oil & Gas Operator | Apr 2019 |
| 290 | Johnson Royalties, Inc. | Austin, TX 78729 | Oil & Gas Operator | Jul 2002 |
| 291 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Apr 2025 |
| 292 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Apr 2025 |
| 293 | Kennedy, R. R. Production, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Apr 2025 |
| 294 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jan 2025 |
| 295 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 296 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 297 | Keystone Energy Oil & Gas, Inc. | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2016 |
| 298 | Kinder Morgan Production Co LLC | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 299 | Kneupper Oil, LLC | MC Camey, TX 79752 | Oil & Gas Operator | Apr 2025 |
| 300 | Kokomo Oil Company | Houston, TX 77227 | Oil & Gas Operator | Apr 1998 |