| 301 | Palo Duro Resources LLC | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 302 | Pampa Water Disposal, Inc. | Booker, TX 79005 | Oil & Gas Operator | Apr 2024 |
| 303 | Pan Resources, Inc. | Borger, TX 79007 | Oil & Gas Operator | Mar 2008 |
| 304 | Panhandle Producing Co., Oper. | San Antonio, TX 78205 | Oil & Gas Operator | Oct 1993 |
| 305 | Panhandle Producing Company | San Antonio, TX 78205 | Oil & Gas Operator | Oct 1993 |
| 306 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Apr 2024 |
| 307 | Parallel Energy LP | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2015 |
| 308 | Pash Energy, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 309 | Perkins-Prothro Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2002 |
| 310 | Petro-Haley | Borger, TX 79008 | Oil & Gas Operator | Apr 2024 |
| 311 | Petrolia Group, L.L.C. | Katy, TX 77449 | Oil & Gas Operator | Apr 2024 |
| 312 | PG-M International Operating,LLC | Borger, TX 79008 | Oil & Gas Operator | Apr 2024 |
| 313 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 314 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | Apr 2024 |
| 315 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 316 | Plains Marketing LP | Cushing, OK 74023 | Oil & Gas Operator | Dec 2022 |
| 317 | Plemons Enterprises | Borger, TX 79008 | Oil & Gas Operator | Aug 1998 |
| 318 | Plumley Company | Pampa, TX 79066 | Oil & Gas Operator | Mar 2022 |
| 319 | Plumley, M. C. & Associates | Borger, TX 79008 | Oil & Gas Operator | Apr 2024 |
| 320 | Pogo Panhandle 2004, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2017 |
| 321 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 322 | Polaris Operating, LLC | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 323 | Ponderosa TX Operating LLC | Stinnett, TX 79083 | Oil & Gas Operator | Apr 2024 |
| 324 | Pony Oil Company | Borger, TX 79008 | Oil & Gas Operator | Jul 2001 |
| 325 | Porter Operating Company, L.L.C. | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 326 | Post Oak Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 2013 |
| 327 | Prairie Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Jan 2017 |
| 328 | Producers Environmental Ser. Inc | Borger, TX 79008 | Oil & Gas Operator | Apr 2024 |
| 329 | Pruett, Cecil | Borger, TX 79008 | Oil & Gas Operator | Aug 2003 |
| 330 | Quantum Resources Management LLC | Houston, TX 77010 | Oil & Gas Operator | Jan 2024 |
| 331 | Quest-Tex Energy Op II, LLC | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 332 | Quest-Tex Energy Operating, LLC | Dallas, TX 75225 | Oil & Gas Operator | Apr 2024 |
| 333 | Questa Energy Corporation | Amarillo, TX 79159 | Oil & Gas Operator | Apr 2024 |
| 334 | Questa Operating Company, LLC | Amarillo, TX 79159 | Oil & Gas Operator | Apr 2024 |
| 335 | Quinque Operating Company | Liberal, KS 67905 | Oil & Gas Operator | Dec 2023 |
| 336 | R & A Moore, Inc. | Cleburne, TX 76033 | Oil & Gas Operator | Apr 2024 |
| 337 | R.E.D. Resources, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Apr 2004 |
| 338 | Rabco Energy | Amarillo, TX 79120 | Oil & Gas Operator | Apr 2024 |
| 339 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 340 | Rass Operating | Amarillo, TX 79124 | Oil & Gas Operator | Jul 2008 |
| 341 | Red Line Company, LTD. | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 342 | Redstone Operating, Inc. | Austin, TX 78734 | Oil & Gas Operator | Jan 2015 |
| 343 | Reneau, James Seed Co. | Shamrock, TX 79079 | Oil & Gas Operator | Apr 2024 |
| 344 | Restoration Energy LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 345 | Revolution Operating Company,LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2024 |
| 346 | Richards' Operating Company | Amarillo, TX 79120 | Oil & Gas Operator | Aug 2003 |
| 347 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 348 | Rig Petroleum, LLC | Spearman, TX 79081 | Oil & Gas Operator | Apr 2024 |
| 349 | Rimrock Gas Company | Weatherford, OK 73096 | Oil & Gas Operator | May 2008 |
| 350 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Apr 2024 |
| 351 | Romac Oil Company, Inc. | Throckmorton, TX 76483 | Oil & Gas Operator | Apr 2024 |
| 352 | Romines & Warner | Pampa, TX 79065 | Oil & Gas Operator | Jan 2002 |
| 353 | Romines Operating Group | Pampa, TX 79066 | Oil & Gas Operator | Nov 2022 |
| 354 | Roxi Production | Pampa, TX 79065 | Oil & Gas Operator | Apr 2024 |
| 355 | RTD Inc | Bartlesville, OK 74006 | Oil Operator | Jan 1995 |
| 356 | S. A. Oil Account | Borger, TX 79008 | Oil & Gas Operator | Dec 1997 |
| 357 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 358 | Samco | Whitesboro, TX 76273 | Oil & Gas Operator | Aug 2013 |
| 359 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 360 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 361 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2024 |
| 362 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 363 | Sand Springs Oil & Gas Co. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2024 |
| 364 | Sanders & Smith, L.C. | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2004 |
| 365 | Sargeco, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Sep 2018 |
| 366 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Apr 2024 |
| 367 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 368 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 369 | Silver Oil & Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Apr 2024 |
| 370 | Sip'S Oil & Gas Inc | Yukon, OK 73099 | Oil & Gas Operator | Apr 2024 |
| 371 | SLT Dakota Operating, Inc. | Yukon, OK 73099 | Oil & Gas Operator | Apr 2024 |
| 372 | Smith, O. Dale & Smith, A. C. | Amarillo, TX 79110 | Oil & Gas Operator | Mar 2000 |
| 373 | SNW Operating Company | Borger, TX 79008 | Oil & Gas Operator | Jul 2016 |
| 374 | South Florida Investment Company | Pampa, TX 79066 | Oil & Gas Operator | Jun 1997 |
| 375 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 376 | Spencer Oil Company | Borger, TX 79007 | Oil & Gas Operator | Jan 2024 |
| 377 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 378 | Stahl Petroleum Co. | Amarillo, TX 79118 | Oil & Gas Operator | Aug 2003 |
| 379 | Stallion Energy LLC | Houston, TX 77090 | Oil & Gas Operator | Oct 2009 |
| 380 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 381 | Stinn-Tex, Inc. | Borger, TX 79008 | Oil & Gas Operator | Sep 2016 |
| 382 | Strat Land Exploration Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 383 | Sunray Oil Co., Inc. | Pampa, TX 79065 | Oil & Gas Operator | Jan 2013 |
| 384 | Suoco Oil Corporation | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 385 | Supa Energy, Inc. | Shamrock, TX 79079 | Oil & Gas Operator | Apr 2024 |
| 386 | T-Y Development Corp | Perryton, TX 79070 | Oil & Gas Operator | Apr 2024 |
| 387 | Taylor, Gordon Oil Company | Sunray, TX 79086 | Oil & Gas Operator | Apr 1996 |
| 388 | Taylor, Gordon Oil Company, LP | Sunray, TX 79086 | Oil & Gas Operator | Feb 2014 |
| 389 | TB Operating, LLC | Borger, TX 79008 | Oil & Gas Operator | Jun 2018 |
| 390 | TC Oil And Gas, LLC | Denton, TX 76205 | Oil Operator | Apr 2024 |
| 391 | Tecolote Energy Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 392 | Tess Oil Company | Borger, TX 79008 | Oil & Gas Operator | Mar 2008 |
| 393 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Apr 2024 |
| 394 | Texas Consolidated Pet. Corp. | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2024 |
| 395 | TGX Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2004 |
| 396 | The Operating Co. | Pampa, TX 79065 | Oil & Gas Operator | Sep 2007 |
| 397 | TJ Oil Company | Borger, TX 79008 | Oil & Gas Operator | Apr 2024 |
| 398 | Tom Coble Oil & Gas LP | Amarillo, TX 79105 | Oil & Gas Operator | Apr 2024 |
| 399 | Toney, W.L. | Borger, TX 79007 | Oil & Gas Operator | Oct 2012 |
| 400 | Topper Oil Company | Borger, TX 79007 | Oil & Gas Operator | Apr 2024 |