| 401 | Bieberle Oil & Gas Inc. | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jun 2025 |
| 402 | Big 'J' Prod Com | | Oil & Gas Operator | Aug 1992 |
| 403 | Big 'O' | | Oil Operator | Jun 2025 |
| 404 | Big Bear Resourc | | Oil Operator | Jan 1989 |
| 405 | Big Eight Energy | El Dorado, KS 67042 | Oil Operator | Apr 2001 |
| 406 | Big Eight Energy, L.L.C. | Wichita, KS 67275 | Oil Operator | Dec 2009 |
| 407 | Big Horn Oil Co Inc | Great Bend, KS 67530 | Oil & Gas Operator | May 2013 |
| 408 | Big Jack Oil & G | | Oil Operator | Sep 1986 |
| 409 | Big Sky Gas Co. | Tribune, KS 67879 | Gas Operator | Dec 2001 |
| 410 | Big Ticket, LLC | Lawrence, KS 66047 | Oil Operator | Mar 2025 |
| 411 | Biggy'S Petroleum | | Oil & Gas Operator | May 2025 |
| 412 | Bill Gallagher Enterprises LLC | Newport Beach, CA 92663 | Gas Operator | Jan 2016 |
| 413 | Billips Trust - | | Oil Operator | Nov 1996 |
| 414 | Billy Cundiff Gas Company | | Gas Operator | Jul 2000 |
| 415 | Billy Oil Incorp | | Oil & Gas Operator | Nov 1991 |
| 416 | Bird & Hanley | | Oil Operator | Dec 1993 |
| 417 | Bird Dog Oil, LLC | Denver, CO 80202 | Oil Operator | Jun 2025 |
| 418 | Bird Energy Inco | | Oil & Gas Operator | Mar 1993 |
| 419 | Bird Enterprises | | Oil Operator | Feb 2002 |
| 420 | Birk Edward E | | Oil Operator | Dec 2009 |
| 421 | Birk Petroleum | | Oil Operator | Jun 2025 |
| 422 | Birk, Darrin L. | Burlington, KS 66839 | Oil Operator | Jun 2025 |
| 423 | Birk, Linda | Burlington, KS 66839 | Oil Operator | Jun 2025 |
| 424 | Birmingham-Bartl | | Oil Operator | Aug 1994 |
| 425 | Biron Incorporat | | Oil Operator | Aug 1989 |
| 426 | Bisbee Gas & Oil | | Oil & Gas Operator | Mar 1995 |
| 427 | Bisbee Oil And Gas Co., Inc. | Kansas City, MO 64106 | Oil & Gas Operator | Dec 2009 |
| 428 | Bishop Oil & Exp | | Oil Operator | Dec 1988 |
| 429 | Bishop, Charlus J. | Kingman, KS 67068 | Oil Operator | Sep 1997 |
| 430 | Bison Energy Cor | | Oil & Gas Operator | Aug 1995 |
| 431 | Bison Energy Corporation | Wichita, KS 67206 | Oil & Gas Operator | Mar 2022 |
| 432 | Bitter Spar LLC | Wichita, KS 67226 | Oil & Gas Operator | Jun 2025 |
| 433 | BJ Oil | Burlington, KS 66839 | Oil Operator | Mar 2012 |
| 434 | Black & White Oper. | Thayer, KS 66776 | Oil Operator | Aug 1998 |
| 435 | Black Dahlia Oil & Gas Co. | Glendale, CA 91208 | Oil Operator | Jun 2025 |
| 436 | Black Diamond Oi | | Oil Operator | Dec 1996 |
| 437 | Black Diamond Oil, Inc. | Hays, KS 67601 | Oil Operator | Apr 2019 |
| 438 | Black Dome Energ | | Oil & Gas Operator | Dec 1996 |
| 439 | Black Dome Energy Corporation | Golden, CO 80401 | Oil & Gas Operator | Dec 2019 |
| 440 | Black Frank J | | Oil & Gas Operator | Jan 1994 |
| 441 | Black Gold Well Service, Inc. | Towanda, KS 67144 | Oil Operator | Dec 2019 |
| 442 | Black Hawk Petro | | Oil Operator | Dec 1993 |
| 443 | Black Oak Exploration, LLC | Denver, CO 80210 | Oil & Gas Operator | Jun 2025 |
| 444 | Black Petroleum | | Oil Operator | Sep 1989 |
| 445 | Black Petroleum Company | Wichita, KS 67277 | Oil Operator | Jan 2004 |
| 446 | Black Rock Resources, LLC | Russell, KS 67665 | Oil Operator | Jun 2025 |
| 447 | Black Sheep Oil & Gas LLC | Odessa, TX 79768 | Oil & Gas Operator | Dec 2025 |
| 448 | Black Spot Oil Company, A General Partnership | Great Bend, KS 67530 | Oil Operator | Dec 2009 |
| 449 | Black Star Petro | | Oil Operator | Jul 1995 |
| 450 | Black Star Petroleum Corp. | Oceanside, NY 11572 | Oil Operator | Oct 1997 |
| 451 | Black Stone Petroleum LLC | Wichita, KS 67206 | Oil Operator | Jul 2019 |
| 452 | Black Tea Oil, LLC | Wichita, KS 67206 | Oil Operator | Jun 2025 |
| 453 | Black W K Incorp | | Oil & Gas Operator | Sep 1991 |
| 454 | Black W K Produc | | Oil & Gas Operator | Aug 1991 |
| 455 | Black, Frank J., Oil Operations, Inc. | Overland Park, KS 66213 | Oil & Gas Operator | Dec 2009 |
| 456 | Black-Travis, Inc. | Paola, KS 66071 | Oil Operator | Jun 2025 |
| 457 | Blackbird Oil Co. | Great Bend, KS 67530 | Oil Operator | Feb 1996 |
| 458 | Blackburn Oil & Gas, Inc. | Kinsley, KS 67547 | Oil & Gas Operator | Sep 2004 |
| 459 | Blackhawk Energy | | Oil Operator | Dec 1993 |
| 460 | Blackhawk Explor | | Oil Operator | Jan 1990 |
| 461 | Blackhawk Exploration, Inc. | Wichita, KS 67214 | Oil & Gas Operator | May 2020 |
| 462 | Blackhawk Oil Co | Ottawa, KS 66067 | Oil & Gas Operator | Jan 2011 |
| 463 | Blackhawk Production Company | | Oil Operator | Jun 2025 |
| 464 | Blackjack Oil & Gas, Inc. | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2025 |
| 465 | Blackstone Drill | | Oil & Gas Operator | Jan 1989 |
| 466 | Blackstone Drilling, Inc. | McPherson, KS 67460 | Gas Operator | Nov 2011 |
| 467 | Blair H H Oil Co | | Oil Operator | Feb 1988 |
| 468 | Blake Exploration | Hays, KS 67601 | Oil Operator | Oct 2007 |
| 469 | Blake Exploration, LLC | Bogue, KS 67625 | Oil Operator | Jun 2025 |
| 470 | Blake Production Company, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2025 |
| 471 | Blanchard, James R. | Paola, KS 66071 | Oil Operator | Nov 2015 |
| 472 | Blanchard, Joe, Jr. | Houma, LA 70360 | Oil Operator | Sep 1989 |
| 473 | Blazer, John A. | Oak Grove, AR 72660 | Oil Operator | Oct 1995 |
| 474 | Blessed Operating LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Jun 2025 |
| 475 | Bloomer Well Ser | | Oil Operator | Mar 1995 |
| 476 | Bloomer Well Service | | Oil Operator | Dec 2009 |
| 477 | Bloomer, Don C. And Bessie L. Liv. Trust | Rantoul, KS 66079 | Oil Operator | Dec 2024 |
| 478 | Blubaugh Charles | | Oil Operator | Feb 1995 |
| 479 | Blue Diamond Holdings, LLC | Wellsville, KS 66092 | Oil Operator | Dec 2009 |
| 480 | Blue Goose Drill | | Oil Operator | Aug 1991 |
| 481 | Blue Goose Drilling Company, Inc. | Great Bend, KS 67530 | Oil Operator | Jun 2025 |
| 482 | Blue Jay Operating, LLC | Fort Worth, TX 76107 | Gas Operator | Dec 2009 |
| 483 | Blue Mountain Company, Inc. | Wichita, KS 67212 | Oil Operator | Feb 1999 |
| 484 | Blue Sky Investments LLC | Harper, KS 67058 | Oil Operator | Dec 2009 |
| 485 | Blue Steel Investments, LLC | Edmond, OK 73013 | Oil Operator | Oct 2024 |
| 486 | Blue Top Crude Oil Co., Inc. | Farlington, KS 66734 | Oil Operator | Jun 2025 |
| 487 | Blue Top Energy LLC | Westport, CT 06880 | Oil Operator | Dec 2019 |
| 488 | Bluebird Production, Inc. | Great Bend, KS 67530 | Oil Operator | Nov 2011 |
| 489 | Bluejacket Operating, LLC | | Oil Operator | Jun 2025 |
| 490 | Blueridge Petroleum Corporation | Edmond, OK 73003 | Oil & Gas Operator | Jun 2025 |
| 491 | Bluestem, Inc | Cedar Vale, KS 67024 | Oil Operator | Dec 2014 |
| 492 | Bluetop Oil Comp | | Oil Operator | Nov 1995 |
| 493 | Bluff Creek Ridge, Inc. | Anthony, KS 67003 | Oil & Gas Operator | Jun 2025 |
| 494 | BMF Oil LLC | Hamilton, KS 66853 | Oil Operator | Dec 2019 |
| 495 | Bob'S Hauling Service, Inc. | St John, KS 67576 | Oil Operator | Apr 2025 |
| 496 | Bobcat Oilfield Service, Inc. | Louisburg, KS 66053 | Oil Operator | Jun 2025 |
| 497 | Bobcat Oilfield Services, Inc. | | Oil Operator | Dec 2009 |
| 498 | Boden Oil Compan | | Oil Operator | Jan 1985 |
| 499 | Boeckman, Robert | Independence, KS 67301 | Oil Operator | Aug 2004 |
| 500 | Boettcher, Fred | Marion, KS 66861 | Oil & Gas Operator | Dec 2009 |