| 401 | Birdwell Oil & Gas, L.L.C. | Bryson, TX 76427 | Oil & Gas Operator | Apr 2024 |
| 402 | Birdwell, C. E. | Bryson, TX 76427 | Oil & Gas Operator | Dec 2001 |
| 403 | Birdwell, Mike Oil Co. | Holliday, TX 76366 | Oil & Gas Operator | Jun 2012 |
| 404 | Birge Oil Co. | Wichita Falls, TX 76302 | Oil & Gas Operator | Jun 1995 |
| 405 | Bishop Petroleum Inc. | Houston, TX 77007 | Oil & Gas Operator | Apr 2024 |
| 406 | Bishop, D. L. | Midland, TX 79702 | Oil & Gas Operator | Mar 2012 |
| 407 | Bishop, E.J. | Winters, TX 79567 | Oil & Gas Operator | May 1997 |
| 408 | Bishop, J. E., Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2012 |
| 409 | Bison Energy Partners, Inc. | Houston, TX 77060 | Oil & Gas Operator | Sep 2001 |
| 410 | Bison Energy Partners, LTD. | Houston, TX 77060 | Oil & Gas Operator | Apr 2002 |
| 411 | Bison Petroleum Corporation | Amarillo, TX 79121 | Oil & Gas Operator | Mar 1996 |
| 412 | Bissell Operating LLC | San Antonio, TX 78216 | Oil Operator | Oct 2016 |
| 413 | Bitter Creek Petroleum Co. | Knox City, TX 79529 | Oil & Gas Operator | Apr 2024 |
| 414 | Bitz, M. J. Company | Fort Worth, TX 76116 | Oil & Gas Operator | Aug 2003 |
| 415 | Bivins, Orville J. Jr. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2004 |
| 416 | BJ Operating, Inc. | Menard, TX 76859 | Oil & Gas Operator | Apr 2024 |
| 417 | BJG Operating Company | Midland, TX 79702 | Oil Operator | Apr 2024 |
| 418 | BKJ Oil, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 419 | BKM Production | Gainesville, TX 76240 | Oil & Gas Operator | Apr 2024 |
| 420 | BKN Oil & Gas, Inc. | Port Lavaca, TX 77979 | Gas Operator | Aug 1997 |
| 421 | BKV Barnett, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Apr 2024 |
| 422 | BKV North Texas, LLC | Fort Worth, TX 76106 | Oil & Gas Operator | Apr 2024 |
| 423 | BL Production, LLC | Abilene, TX 79606 | Oil Operator | Apr 2024 |
| 424 | Black Arrow Operating, LLC | Dennis, TX 76439 | Oil & Gas Operator | Apr 2024 |
| 425 | Black Bandana LLC | Santo, TX 76472 | Oil & Gas Operator | Apr 2024 |
| 426 | Black Bayou Operating, LLC | Fort Worth, TX 76116 | Oil & Gas Operator | Jan 2024 |
| 427 | Black Bear Oil Corporation | Las Vegas, NV 89128 | Oil & Gas Operator | Feb 2024 |
| 428 | Black Creek Oil Company, LLC | Yancey, TX 78886 | Oil Operator | Apr 2024 |
| 429 | Black Creek Production Co., Inc. | Driftwood, TX 78619 | Oil & Gas Operator | Feb 2000 |
| 430 | Black Diamond Operating Co., LLC | Kilgore, TX 75662 | Oil & Gas Operator | Sep 2009 |
| 431 | Black Dome Energy Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 432 | Black Draw Energy LLC | Cypress, TX 77433 | Oil & Gas Operator | Apr 2024 |
| 433 | Black Elk Energy Offshore Op LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2024 |
| 434 | Black Gold Energy LLC | Monroe, LA 71207 | Oil Operator | Aug 2023 |
| 435 | Black Gold Operating Co, LLC | Plntersville, TX 77363 | Oil & Gas Operator | Apr 2024 |
| 436 | Black Gold Petroleum, LLC | Alice, TX 78333 | Oil Operator | Apr 2024 |
| 437 | Black Gold Properties | Lubbock, TX 79424 | Oil & Gas Operator | Feb 1999 |
| 438 | Black Gold Well Service | San Angelo, TX 76901 | Oil & Gas Operator | Apr 2024 |
| 439 | Black Horse Resources, LLC | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2023 |
| 440 | Black Jack Oil Co Inc | Holliday, TX 76366 | Oil & Gas Operator | Jan 2024 |
| 441 | Black Jack Services, L.L.C. | Bastrop, TX 78602 | Oil & Gas Operator | Apr 2024 |
| 442 | Black Jack Well Service, Inc. | Somerset, TX 78069 | Oil & Gas Operator | Aug 2003 |
| 443 | Black Mac Oil, Inc. | Hondo, TX 78861 | Oil Operator | Apr 2024 |
| 444 | Black Mountain Oil & Gas II LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2021 |
| 445 | Black Mountain Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 446 | Black Mountain STX I LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 447 | Black Mountain SWD LP | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 448 | Black Oil Company, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2010 |
| 449 | Black Pearl Exploration, L.L.C. | Houston, TX 77095 | Oil & Gas Operator | May 2015 |
| 450 | Black Pearl Operating Comp., LLC | Houston, TX 77057 | Oil Operator | Apr 2024 |
| 451 | Black Pool Energy, LP | Houston, TX 77070 | Oil & Gas Operator | Apr 2024 |
| 452 | Black Resources, Inc. | Granbury, TX 76049 | Oil & Gas Operator | Mar 2008 |
| 453 | Black River Operating LLC | Keller, TX 76248 | Oil Operator | Apr 2024 |
| 454 | Black Rock Resources, LLC | Russell, KS 67665 | Oil Operator | Dec 2023 |
| 455 | Black Sable Energy, LLC | San Antonio, TX 78209 | Oil Operator | Jan 2018 |
| 456 | Black Sheep Oil & Gas LLC | Odessa, TX 79768 | Oil & Gas Operator | Apr 2024 |
| 457 | Black Sheep Operating, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Apr 2024 |
| 458 | Black Star Oil Company | Plano, TX 75094 | Oil & Gas Operator | Apr 2024 |
| 459 | Black Stone Energy Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2004 |
| 460 | Black Stone Energy Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 461 | Black Stone Oil Company | Dallas, TX 75244 | Oil & Gas Operator | Feb 1997 |
| 462 | Black Strata LLC | Weatherford, TX 76086 | Oil Operator | Apr 2024 |
| 463 | Black Swan Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2023 |
| 464 | Black Top Operating, LLC | Midland, TX 79706 | Oil & Gas Operator | Apr 2024 |
| 465 | Black'S Oil & Gas | Pampa, TX 79066 | Oil & Gas Operator | Apr 2024 |
| 466 | Black, Karl T. | Paradise, TX 76073 | Oil & Gas Operator | Aug 2003 |
| 467 | Blackbeard Operating, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2024 |
| 468 | Blackbrush O & G, Inc. | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2012 |
| 469 | Blackbrush O & G, LLC | San Antonio, TX 78259 | Oil & Gas Operator | Apr 2024 |
| 470 | Blackflat Oil Company LLC | Lubbock, TX 79424 | Oil Operator | Apr 2024 |
| 471 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Apr 2024 |
| 472 | Blackjack Operating L. L. C. | Schertz, TX 78154 | Oil Operator | Apr 2024 |
| 473 | Blackland Oil & Gas | Portland, TX 78374 | Oil & Gas Operator | Aug 1997 |
| 474 | Blackmar, Jim Oil Operator | Luling, TX 78648 | Oil & Gas Operator | Jan 2021 |
| 475 | Blackmun Family Partners, L.P. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 476 | Blackrock Drilling, LLC | Abilene, TX 79606 | Oil Operator | Apr 2024 |
| 477 | Blackshear, Charley | Winters, TX 79567 | Oil & Gas Operator | Oct 1998 |
| 478 | Blackstone Energy Services LLC | Christoval, TX 76935 | Oil & Gas Operator | Apr 2024 |
| 479 | Blackwater Oil & Gas Corporation | Colleyville, TX 76034 | Oil & Gas Operator | May 2018 |
| 480 | Blackwelder Oil | MC Camey, TX 79752 | Oil Operator | Apr 2024 |
| 481 | Blackwell BMC, LLC | Dallas, TX 75204 | Oil & Gas Operator | Sep 2021 |
| 482 | Blackwell BMC, LP | Dallas, TX 75252 | Oil & Gas Operator | Mar 2007 |
| 483 | Blackwell Drilling Co. | Cameron, TX 76520 | Oil & Gas Operator | Nov 2004 |
| 484 | Blackwell Exp & Development, LLC | Dallas, TX 75252 | Oil & Gas Operator | Nov 2023 |
| 485 | Blackwell Exploration & Development LLC | Dallas, TX 75252 | Oil & Gas Operator | Jan 2024 |
| 486 | Blackwell Operating Company | Houston, TX 77227 | Oil & Gas Operator | Jun 2007 |
| 487 | Blade Oil Co. | Borger, TX 79007 | Oil & Gas Operator | Jun 1994 |
| 488 | Blair Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2011 |
| 489 | Blair Oil Company | Kingfisher, OK 73750-1213 | Oil & Gas Operator | Feb 2024 |
| 490 | Blair, Jack N. | Midland, TX 79702 | Oil & Gas Operator | May 1996 |
| 491 | Blair, R. W. | FT Stockton, TX 79735 | Oil & Gas Operator | Dec 2009 |
| 492 | Blake Oil & Gas Corporation | Midland, TX 79701 | Oil & Gas Operator | May 2004 |
| 493 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2024 |
| 494 | Blakemore, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Dec 2012 |
| 495 | Blakenergy Operating, LLC | Spring, TX 77386 | Oil & Gas Operator | Apr 2024 |
| 496 | Blalack, James William | Schertz, TX 78154 | Oil & Gas Operator | Apr 2024 |
| 497 | Blanco Engineering Inc. | Artesia, NM 88210 | Oil & Gas Operator | Feb 1997 |
| 498 | Blanco Oil Company | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2010 |
| 499 | Blazer Energy Corp. | Alexandria, VA 22314 | Oil & Gas Operator | Dec 2014 |
| 500 | Blazer Resources, Inc. | Leesburg, TX 75451 | Oil & Gas Operator | Apr 2024 |