| 8501 | Double Aa S LLC | Mayport, PA 16240-5638 | Oil & Gas Operator | Dec 2019 |
| 8502 | Double Barrel Oil Co. | | Oil Operator | Dec 1978 |
| 8503 | Double Barrel Oil LLC | Brenham, TX 77834 | Oil & Gas Operator | Apr 2025 |
| 8504 | Double Barrel Operating Limited Liability Company | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 8505 | Double C Oil & Gas LLC | Jenks, OK 74037-6946 | Oil Operator | Jan 2025 |
| 8506 | Double C Operating LLC | Abilene, TX 79602 | Oil Operator | Apr 2025 |
| 8507 | Double D Producers, Inc | Edmonton, KY 42129 | Oil Operator | Dec 2023 |
| 8508 | Double D'S LLC | Hays, KS 67601 | Oil Operator | Dec 2024 |
| 8509 | Double Diamond Energy Corp. | Granbury, TX 76048 | Gas Operator | Apr 2013 |
| 8510 | Double Diamond Petroleum, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 8511 | Double E Oil & Gas, L. P. | Electra, TX 76360 | Oil & Gas Operator | Apr 2025 |
| 8512 | Double Eagle Exp | | Oil Operator | Jul 1992 |
| 8513 | Double Eagle Exploration Inc | Windthorst, TX 76389 | Oil Operator | Dec 2024 |
| 8514 | Double Eagle Oil & Gas Inc | Enid, OK 73702 | Oil & Gas Operator | Jan 2000 |
| 8515 | Double Eagle Oil Co. | Marshall, TX 75670 | Oil & Gas Operator | Jan 2002 |
| 8516 | Double Eagle Operating, LLC | Fort Worth, TX 76113 | Oil & Gas Operator | Apr 2025 |
| 8517 | Double Eagle Petroleum Corp | Evansville, IN 47725 | Oil & Gas Operator | Apr 2025 |
| 8518 | Double Eagle Resources, LLC | FT Smith, AR 72901 | Oil & Gas Operator | Sep 2009 |
| 8519 | Double Eight Oil Company LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Apr 2025 |
| 8520 | Double F Oil Co. | | Oil Operator | Jun 2009 |
| 8521 | Double G Oil LLC | Bartlesville, OK 74003 | Oil Operator | Jan 2025 |
| 8522 | Double G Petro LLC | | Oil Operator | Dec 2024 |
| 8523 | Double H Petroleum Corporation | Tulsa, OK 74136-5414 | Oil & Gas Operator | May 2006 |
| 8524 | Double J Enterprises | Loving, TX 76460 | Oil Operator | Apr 2025 |
| 8525 | Double J Oil Co LLC | Bristow, OK 74010-9532 | Oil & Gas Operator | Feb 2025 |
| 8526 | Double J Operating Company, Inc. | San Antonio, TX 78205 | Oil Operator | Jan 2008 |
| 8527 | Double J Resources Inc | Bradford, PA 16701-6506 | Oil & Gas Operator | Dec 2022 |
| 8528 | Double K Production | Graham, TX 76450 | Oil & Gas Operator | Sep 2014 |
| 8529 | Double L Contractors, LLC | Carthage, TX 75633 | Oil Operator | Apr 2025 |
| 8530 | Double L Drilling | Yates Center, KS 66783 | Oil Operator | Jun 2000 |
| 8531 | Double L Oil Producers | | Oil Operator | Dec 2019 |
| 8532 | Double L Operating | Graham, TX 76450 | Oil & Gas Operator | Nov 2018 |
| 8533 | Double M Petroproperties, Inc. | Haskell, TX 79521 | Oil & Gas Operator | Apr 2025 |
| 8534 | Double Play Oil & Gas | Portland, TX 78374 | Oil & Gas Operator | Dec 2001 |
| 8535 | Double Play Oil & Gas, Inc | Portland, TX 78374 | Oil & Gas Operator | Apr 2025 |
| 8536 | Double R Oil Co. | Charlotte, TX 78011 | Oil & Gas Operator | May 2010 |
| 8537 | Double R Operations | Terral, OK 73569-5021 | Oil Operator | Dec 2014 |
| 8538 | Double R Petroleum | | Oil & Gas Operator | Sep 2004 |
| 8539 | Double S Liberty Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 8540 | Double S Operating Co. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2025 |
| 8541 | Double T Energy LLC | Lenorah, TX 79749 | Oil Operator | Apr 2025 |
| 8542 | Double Ten Petro | | Oil Operator | Jul 1994 |
| 8543 | Double U Oil Co. | San Antonio, TX 78217 | Oil & Gas Operator | Feb 1996 |
| 8544 | Double U Oil Co., LTD. | San Antonio, TX 78217 | Oil & Gas Operator | May 2000 |
| 8545 | Doudna, Mark A. | Osawatomie, KS 66064 | Oil Operator | Nov 2009 |
| 8546 | Doug'S Pumping Service | | Oil Operator | Dec 2024 |
| 8547 | Dougherty Properties | Beeville, TX 78104 | Oil & Gas Operator | Jun 1997 |
| 8548 | Dougherty, H W | Petaluma, CA 94954 | Gas Operator | Oct 2019 |
| 8549 | Doughtie Operating Company, LLC | MC Queeney, TX 78123 | Oil & Gas Operator | Mar 2023 |
| 8550 | Douglas Edwards | | Oil Operator | Nov 1993 |
| 8551 | Douglas Fairbanks Holdings LLC | Pine Hurst, TX 77362-9998 | Oil & Gas Operator | Feb 2025 |
| 8552 | Douglas Investments Inc | Fort Worth, TX 76137 | Oil Operator | Jan 2020 |
| 8553 | Douglas Oil & Gas Co Inc | Ada, OK 74820 | Oil Operator | Apr 2014 |
| 8554 | Douglas Oil & Gas Inc | Canonsburg, PA 15317 | Gas Operator | Dec 2003 |
| 8555 | Douglas Oil & Gas LP | State College, PA 16803 | Oil & Gas Operator | Dec 2007 |
| 8556 | Douglas Petroleum Inc. | Spring, TX 77379 | Oil & Gas Operator | Nov 2010 |
| 8557 | Douglas W. Baker Trustee | | Oil & Gas Operator | Dec 1993 |
| 8558 | Douglas Whitney | | Oil Operator | Dec 2004 |
| 8559 | Douglas, Marvin E Dba Douglas Radiation | | Oil & Gas Operator | Dec 2023 |
| 8560 | Douglas, Norvel Trust | H SPG NTL PK, AR 71909 | Oil & Gas Operator | Aug 2013 |
| 8561 | Douglass Dietz & Daley Inc | Oklahoma City, OK 73154-0125 | Oil & Gas Operator | Aug 2023 |
| 8562 | Dove Creek Energy, Inc. | Fort Worth, TX 76121 | Oil & Gas Operator | Apr 2025 |
| 8563 | Dove Creek Resources, LLC | Arlington, TX 76012 | Oil Operator | Apr 2025 |
| 8564 | Dove Drilling, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 1997 |
| 8565 | Dove Investments LLC | Wetumka, OK 74883 | Oil Operator | Oct 2024 |
| 8566 | Dove Mineral | Abilene, TX 79601 | Oil & Gas Operator | Dec 2010 |
| 8567 | Dover Atwood Corporation | Massillon, OH 44646 | Oil & Gas Operator | Dec 2024 |
| 8568 | Dover Oil Co | Marietta, OH 45750 | Oil & Gas Operator | Dec 1999 |
| 8569 | Dow Intrastate Gas Company | | Oil Operator | Dec 2023 |
| 8570 | Dow Mineral & Royalty Co, Inc | | Oil & Gas Operator | Jun 1994 |
| 8571 | Dowd, Gene | | Oil & Gas Operator | Dec 2013 |
| 8572 | Dowden, T. L. | Henderson, TX 75652 | Oil & Gas Operator | Apr 2025 |
| 8573 | Dowell Oil & Gas | Stephenville, TX 76401 | Oil & Gas Operator | Apr 2025 |
| 8574 | Down-Hole Pump Service Co., Inc. | Fort Worth, TX 76109 | Oil & Gas Operator | Apr 2025 |
| 8575 | Downhole Oil & Gas Tech LLC | Countyline, OK 73152-0027 | Oil Operator | Oct 2009 |
| 8576 | Downing Well Service, Inc. | Devine, TX 78016 | Oil & Gas Operator | Apr 2025 |
| 8577 | Downing-Nelson Oil Co Inc | Hays, KS 67601 | Oil & Gas Operator | Dec 2024 |
| 8578 | Downman Jones Oil Operators, Inc | Brookshire, TX 77423 | Oil & Gas Operator | Jan 2007 |
| 8579 | Doyle Dempsey | | Oil Operator | May 1997 |
| 8580 | Doyle E Baxter | Bloomfield, NM 87413 | Oil Operator | Feb 2005 |
| 8581 | Doyle Hartman | Midland, TX 79702 | Oil & Gas Operator | Nov 2005 |
| 8582 | DP Permian Operator, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 8583 | DP Well Works I, LLC | Salt Lake Cty, UT 84103 | Oil & Gas Operator | Apr 2025 |
| 8584 | DP2, LLC | Southlake, TX 76092 | Oil & Gas Operator | Apr 2025 |
| 8585 | DPMP Energy LLC | Prosper, TX 75078 | Oil & Gas Operator | Dec 2023 |
| 8586 | DR Well Operator | | Oil Operator | Jan 1990 |
| 8587 | DR. Richard C. Baker | | Oil & Gas Operator | Sep 2009 |
| 8588 | Drachen Energy Co. | San Antonio, TX 78258 | Oil Operator | Apr 2025 |
| 8589 | Drachen Oil Company | San Antonio, TX 78258 | Oil & Gas Operator | Apr 2025 |
| 8590 | Draco Energy, Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 8591 | Draco Production Company | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2012 |
| 8592 | Dragon Energy Corporation | | Oil & Gas Operator | Oct 2006 |
| 8593 | Dragon Energy LLC | Tulsa, OK 74135-7234 | Oil & Gas Operator | Feb 2015 |
| 8594 | Dragon Operating, LLC | Tulsa, OK 74137 | Oil Operator | Apr 2025 |
| 8595 | Dragoon Oil & Gas Co. | Fort Worth, TX 76147 | Oil & Gas Operator | May 2015 |
| 8596 | Drain Oil Co. | Fritch, TX 79036 | Oil & Gas Operator | Jul 2009 |
| 8597 | Drain Oil Co. LLC | Fritch, TX 79036 | Oil & Gas Operator | Apr 2025 |
| 8598 | Drake Denver | Shinglehouse, PA 16748-5517 | Oil & Gas Operator | Dec 2024 |
| 8599 | Drake Energy Corporation | | Gas Operator | Dec 2024 |
| 8600 | Drake Exploration Inc | Tulsa, OK 74105-4250 | Oil & Gas Operator | Feb 2025 |