| 401 | Davis & Davis Machine Shop, Inc. | Bowie, TX 76230 | Oil & Gas Operator | Sep 2026 |
| 402 | Davis & Davis Oil Properties Inc | Morris, OK 74445 | Oil Operator | Jun 2026 |
| 403 | Davis & Fitzgera | | Gas Operator | Dec 1983 |
| 404 | Davis & Hamilton Oil Company | Edmond, OK 73083-3670 | Oil Operator | Aug 2022 |
| 405 | Davis & Kaiser Operating, Inc. | | Oil Operator | May 2004 |
| 406 | Davis & Salmon | Muenster, TX 76252 | Oil & Gas Operator | Oct 2017 |
| 407 | Davis & Tharel | | Oil & Gas Operator | Dec 1988 |
| 408 | Davis And Backus | | Oil Operator | Nov 1999 |
| 409 | Davis Asset Management, Inc. | Houston, TX 77010 | Oil & Gas Operator | Dec 2004 |
| 410 | Davis Bobby J | Upton, WY 82730 | Oil & Gas Operator | Oct 1989 |
| 411 | Davis Bradley & Kathy | Stockport, OH 43787 | Oil Operator | Dec 2025 |
| 412 | Davis Bros. Oil Producers, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2020 |
| 413 | Davis Brothers O | | Oil Operator | Dec 1987 |
| 414 | Davis Charles K | Morris, OK 74445-2201 | Oil & Gas Operator | Apr 2015 |
| 415 | Davis Consulting LLC | Tulsa, OK 74104 | Oil Operator | Apr 2024 |
| 416 | Davis Contract Pumping | | Oil Operator | Oct 2000 |
| 417 | Davis Davis & Davis | | Oil & Gas Operator | Dec 1988 |
| 418 | Davis Drilling & | | Oil Operator | Jul 1989 |
| 419 | Davis Energy Services LLC | La Grange, TX 78945 | Oil Operator | Sep 2026 |
| 420 | Davis Enterprises | Abilene, TX 79608 | Oil & Gas Operator | Aug 1998 |
| 421 | Davis Exploration | | Oil Operator | Dec 2007 |
| 422 | Davis Gulf Coast, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2026 |
| 423 | Davis Henry | Tulsa, OK 74135-3567 | Oil & Gas Operator | Dec 1994 |
| 424 | Davis Investment LLC | | Oil & Gas Operator | Dec 1998 |
| 425 | Davis Jared | Wann, OK 74083-9610 | Oil & Gas Operator | Jul 2026 |
| 426 | Davis Jim L | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 427 | Davis Kendall | Bethany, OK 73008-4714 | Oil Operator | Aug 2016 |
| 428 | Davis Oil & Gas, LLC | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2011 |
| 429 | Davis Oil Compan | | Oil Operator | Jul 1988 |
| 430 | Davis Oil Company | Denver, CO 80202 | Oil & Gas Operator | Jun 1988 |
| 431 | Davis Oil Company-Cox | | Oil & Gas Operator | Aug 1980 |
| 432 | Davis Operating Company | Elysian Field, TX 75642 | Oil & Gas Operator | Sep 2026 |
| 433 | Davis Petroleum | | Oil & Gas Operator | Dec 1996 |
| 434 | Davis Petroleum Corp. | Houston, TX 77027 | Oil & Gas Operator | Sep 2026 |
| 435 | Davis Petroleum, Inc. | Great Bend, KS 67530 | Oil Operator | Aug 2021 |
| 436 | Davis Southern Operating Co LLC | Houston, TX 77004 | Oil & Gas Operator | Sep 2026 |
| 437 | Davis William H | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2014 |
| 438 | Davis William W | | Oil Operator | Jun 2024 |
| 439 | Davis, A. L. Production Co.,Inc. | Van Vleck, TX 77482 | Oil & Gas Operator | Aug 2003 |
| 440 | Davis, Billy F. | Tulsa, OK 74152 | Oil Operator | Jun 1988 |
| 441 | Davis, C. O. Production Co. | Bay City, TX 77414 | Oil & Gas Operator | Sep 2026 |
| 442 | Davis, D. D. Estate Of | Borger, TX 79008 | Oil & Gas Operator | Jul 1998 |
| 443 | Davis, Don Oil Co. | Nocona, TX 76255 | Oil & Gas Operator | Sep 2026 |
| 444 | Davis, Edward Mike | | Oil Operator | Dec 2011 |
| 445 | Davis, Gowin | Wichita Falls, TX 76308 | Oil & Gas Operator | Mar 2001 |
| 446 | Davis, J. R. Oil Company | Sweeny, TX 77480 | Oil & Gas Operator | Sep 2026 |
| 447 | Davis, Joe D. | Fort Smith, AR 72903 | Gas Operator | Mar 2015 |
| 448 | Davis, Kelly J. | Muenster, TX 76252 | Oil Operator | Sep 2026 |
| 449 | Davis, Larry D. | Boling, TX 77420 | Oil & Gas Operator | Sep 2026 |
| 450 | Davis, Michael G. | Wichita, KS 67212 | Oil & Gas Operator | Jul 1988 |
| 451 | Davis, Odis Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Dec 2000 |
| 452 | Davis, Paul Pipe & Supply Inc. | Abilene, TX 79606 | Oil & Gas Operator | Feb 2001 |
| 453 | Davis, R. E. Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2015 |
| 454 | Davis, Randy | Perryton, TX 79070 | Oil & Gas Operator | Jun 2017 |
| 455 | Davis, Robert E. | Graham, TX 76450 | Oil & Gas Operator | Apr 1997 |
| 456 | Davis, Robert W. | Richfield, KS 67953 | Gas Operator | Dec 2010 |
| 457 | Davis, Roland C. | Hardin, TX 77561 | Oil & Gas Operator | May 1997 |
| 458 | Davis, Sammy | Albany, TX 76430 | Oil & Gas Operator | Sep 2026 |
| 459 | Davis, Tommy | Hebbronville, TX 78361 | Oil & Gas Operator | Jun 1995 |
| 460 | Davis, Travis H. | Spearman, TX 79081 | Oil & Gas Operator | Jul 2003 |
| 461 | Davis, Travis H. Gas | Spearman, TX 79081 | Oil & Gas Operator | Sep 2026 |
| 462 | Davis, Wilbur Oil Production Company | Junction City, AR 71749 | Oil Operator | Jan 2025 |
| 463 | Davis-Goodman Oil Company | | Oil & Gas Operator | Jun 1980 |
| 464 | Davis-Goodman-Medders | | Oil & Gas Operator | Jun 1980 |
| 465 | Davis/Osage Corp | Tulsa, OK 74103 | Oil Operator | Jan 2001 |
| 466 | Davisson, Ancil | | Oil & Gas Operator | Oct 2001 |
| 467 | Davon Drilling Company | Oklahoma City, OK 73113-0665 | Oil & Gas Operator | Mar 2015 |
| 468 | Dawes, Tom E | | Oil Operator | Oct 2000 |
| 469 | Dawkins Energies, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Sep 2026 |
| 470 | Dawn Energy SVC | Templeton, PA 16259-3616 | Gas Operator | Dec 2025 |
| 471 | Dawn Oil & Gas Operators Inc. | Borger, TX 79007 | Oil & Gas Operator | Sep 2026 |
| 472 | Dawsey Operating Company | Georgetown, TX 78628 | Oil & Gas Operator | Mar 2016 |
| 473 | Dawson Energy, LLC | Midland, TX 79702 | Gas Operator | Sep 2026 |
| 474 | Dawson Exploration, Inc. | | Oil & Gas Operator | Jun 1986 |
| 475 | Dawson Geophysical Company | Midland, TX 79701 | Oil Operator | Aug 2024 |
| 476 | Dawson Resources Inc | Franktown, CO 80116 | Oil & Gas Operator | Mar 2015 |
| 477 | Dawson, B G Oil & Gas LTD | Dallas, TX 75205 | Oil & Gas Operator | Jul 2024 |
| 478 | Dawson, Levi S | | Oil & Gas Operator | Mar 2015 |
| 479 | Dawson-Markwell | | Oil & Gas Operator | Nov 1996 |
| 480 | Dawson-Markwell Exploration Co. | Oklahoma City, OK 73101 | Oil & Gas Operator | Jun 2026 |
| 481 | Dawydko, Keith A. & Ronald T. | Clarence, NY 14031 | Gas Operator | Dec 2025 |
| 482 | Daxin Energy Corporation | Seminole, OK 74868-2208 | Oil Operator | Jan 2013 |
| 483 | Day Dreams Resources, LLC | | Oil & Gas Operator | Dec 2025 |
| 484 | Day Resources, Inc. | Midland, TX 79707 | Oil & Gas Operator | Aug 1994 |
| 485 | Day Richard H | Wann, OK 74083-9608 | Oil Operator | Mar 2015 |
| 486 | Day Town Operating, LLC | | Oil & Gas Operator | Jan 2025 |
| 487 | Daybreak Oil And Gas, Inc. | | Oil & Gas Operator | Jul 2026 |
| 488 | Daylight Petroleum LLC | Houston, TX 77052 | Oil & Gas Operator | Sep 2026 |
| 489 | Daymon Martin | | Oil Operator | Mar 1983 |
| 490 | Daystar Operating Company, LLC | Austin, TX 78750 | Oil & Gas Operator | Apr 2008 |
| 491 | Daystar Petroleum Inc | Eureka, KS 67045 | Oil & Gas Operator | May 2026 |
| 492 | DB Energy, LLC | Baldwin City, KS 66006 | Oil Operator | Mar 2026 |
| 493 | DB Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 494 | DBC Operating Company LLC | Midlothian, TX 76065 | Oil & Gas Operator | Sep 2026 |
| 495 | DBD Oil, LLC | Emporia, KS 66801 | Oil Operator | May 2026 |
| 496 | DBF Partners | | Oil Operator | Dec 1986 |
| 497 | DBL DRLG.&Prod. Services, Inc. | | Oil & Gas Operator | Jul 1997 |
| 498 | Dbo Oil Incorporated | Georgetown, TX 78628 | Oil & Gas Operator | Sep 2026 |
| 499 | DBP Exploration, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Sep 2026 |
| 500 | DBS Oil Co /Osage Only | | Oil Operator | Nov 2025 |