| 201 | Huntington Energy LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | May 2025 |
| 202 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 203 | Irish City Oil & Gas, Inc. | Wimberley, TX 78676 | Oil & Gas Operator | May 2025 |
| 204 | J & A Oil Company | Odessa, TX 79764 | Oil & Gas Operator | May 2025 |
| 205 | J&N Production | Shamrock, TX 79079 | Oil & Gas Operator | May 2025 |
| 206 | J-Brex Company | Amarillo, TX 79101 | Oil & Gas Operator | May 2025 |
| 207 | J-Gar, Inc. | Amarillo, TX 79101 | Oil & Gas Operator | Jan 2003 |
| 208 | J-Gar, LTD. | Amarillo, TX 79101 | Gas Operator | Dec 2019 |
| 209 | J.B. Exploration | Cactus, TX 79013 | Oil & Gas Operator | Sep 1997 |
| 210 | JCB II Enterprises LLC | Perryton, TX 79070 | Oil & Gas Operator | Jun 2023 |
| 211 | Jetta Operating Company Inc | Fort Worth, TX 76102 | Oil & Gas Operator | May 2025 |
| 212 | Jimco Energy Inc. | Stockdale, TX 78160 | Oil & Gas Operator | May 2025 |
| 213 | Jip Rock, LLC | Shamrock, TX 79079 | Oil & Gas Operator | May 2025 |
| 214 | Jma Energy Co Of Texas, L.L.C. | Oklahoma City, OK 73118 | Oil & Gas Operator | Mar 2010 |
| 215 | Jmar Petroleum LLC | McLean, TX 79057 | Gas Operator | May 2025 |
| 216 | Jones Energy, LTD. | Austin, TX 78746 | Oil & Gas Operator | Sep 2013 |
| 217 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2025 |
| 218 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 219 | Kellerville Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | May 2025 |
| 220 | Kelton Oil & Gas Co | Wheeler, TX 79096 | Oil Operator | Jun 1991 |
| 221 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Mar 2025 |
| 222 | Kimbrel Oil Corporation | Tulsa, OK 74114 | Oil & Gas Operator | May 2025 |
| 223 | King Operating Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | May 2025 |
| 224 | Kismet Properties, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | May 2025 |
| 225 | Latigo Oil And Gas Inc | Woodward, OK 73801 | Oil & Gas Operator | Mar 2025 |
| 226 | Latigo Petroleum Texas, LP | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 227 | Latigo Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2025 |
| 228 | Le Norman Operating LLC | Oklahoma City, OK 73142 | Oil & Gas Operator | Nov 2019 |
| 229 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 230 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | May 2025 |
| 231 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 232 | Lionheart Energy Corporation | Durango, CO 81301 | Oil & Gas Operator | May 2025 |
| 233 | Littlepage, Tommy | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 234 | Lone Tree Oil & Gas LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | May 2025 |
| 235 | Luconda Oil | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 236 | Lyric Energy, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 1996 |
| 237 | M E G G , Inc. | Borger, TX 79008 | Oil & Gas Operator | Sep 2003 |
| 238 | Macina, P.T. | Shamrock, TX 79079 | Gas Operator | May 2025 |
| 239 | Magic City Oil & Gas | Amarillo, TX 79109 | Oil & Gas Operator | May 2025 |
| 240 | Makar Production Company | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 241 | Malson Oil Company | Crawford, OK 73638 | Oil & Gas Operator | Dec 2016 |
| 242 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Mar 2025 |
| 243 | Marjac Oil Company, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 244 | Marsh Operating Company | Dallas, TX 75221 | Oil & Gas Operator | Jan 2025 |
| 245 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 246 | Mayfield Engineering Service | Tulsa, OK 74104 | Oil & Gas Operator | May 2025 |
| 247 | McCulliss Resources Co Inc | Littleton, CO 80161-3248 | Oil & Gas Operator | Jun 2009 |
| 248 | McKinney Operating Company | Canadian, TX 79014 | Gas Operator | May 2002 |
| 249 | McNic Oil & Gas Midcontinent,Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 1999 |
| 250 | Medallion Petroleum, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2015 |
| 251 | Megg, L.P. | Borger, TX 79007 | Oil & Gas Operator | May 2025 |
| 252 | Mer Resources | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 253 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 254 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 255 | Mewbourne Oil Company | Tyler, TX 75711 | Oil & Gas Operator | May 2025 |
| 256 | Mge Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Feb 2025 |
| 257 | Midcoast G & P (East Texas) L.P. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 258 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 259 | Milam, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2025 |
| 260 | Minco Oil And Gas Co. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2024 |
| 261 | Mineral Development, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1996 |
| 262 | Minuja Oil And Gas LLC | Corpus Christi, TX 78401 | Oil & Gas Operator | Sep 1996 |
| 263 | Mito Resources TX LLC | Edmond, OK 73013 | Oil & Gas Operator | May 2025 |
| 264 | MJ Oil, Inc. | Houston, TX 77265 | Oil & Gas Operator | May 2025 |
| 265 | MK Operating Co. | Pampa, TX 79065 | Oil & Gas Operator | Jun 2014 |
| 266 | MMGL TXPH, LLC | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 267 | Mobeetie Resource Dev LLC | Booker, TX 79005 | Oil & Gas Operator | May 2025 |
| 268 | Mon Corp. | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 269 | Morgas | Shamrock, TX 79079 | Gas Operator | Nov 1994 |
| 270 | Munson Operating, Inc. | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 271 | Myriad Resources Corporation | Pampa, TX 79066 | Oil & Gas Operator | May 2025 |
| 272 | Nabob Production Company | Amarillo, TX 79105 | Gas Operator | Dec 1991 |
| 273 | Natural Gas Anadarko Company | Perryton, TX 79070 | Oil & Gas Operator | May 2025 |
| 274 | NBL Permian LLC | Houston, TX 77070 | Oil & Gas Operator | Aug 2018 |
| 275 | Newfield Expl. Mid-Con. Inc | Tulsa, OK 74172 | Oil & Gas Operator | Jan 2015 |
| 276 | Newfield Exploration Company | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2017 |
| 277 | Newton Corp.,The | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 278 | Nielson & Associates Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 279 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 280 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | May 2025 |
| 281 | Norvel Douglas Oil Inc. | H SPG NTL PK, AR 71909 | Oil Operator | May 2025 |
| 282 | O'Neill Properties, LTD. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 283 | O'Ryan Oil And Gas | Odessa, TX 79768 | Oil & Gas Operator | May 2025 |
| 284 | Occidental Energy Company, Inc. | Houston, TX 77282 | Oil & Gas Operator | Jul 2021 |
| 285 | Ocean Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 286 | Odegard Energy, Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2020 |
| 287 | Okie Operating Company, LTD. | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 288 | Omega Operating, Inc. | Odessa, TX 79769 | Oil & Gas Operator | Mar 2001 |
| 289 | Onyx Producing Company, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2008 |
| 290 | Otc Petroleum Corporation | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2015 |
| 291 | Overflow Energy, LLC | Booker, TX 79005 | Oil & Gas Operator | May 2025 |
| 292 | Ovintiv USA Inc. | Denver, CO 80202 | Oil & Gas Operator | May 2025 |
| 293 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 294 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 295 | Pablo Energy II, LLC | Amarillo, TX 79105 | Oil & Gas Operator | Feb 2025 |
| 296 | Pablo Energy, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2005 |
| 297 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | May 2025 |
| 298 | Pardee Production Co. | Skiatook, OK 74070 | Oil & Gas Operator | Mar 2021 |
| 299 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 300 | Parker & Parsley Producing LP | Midland, TX 79702 | Oil & Gas Operator | Oct 1997 |