| 8401 | Dunkirk City School District | Dunkirk, NY 14048 | Gas Operator | Dec 2024 |
| 8402 | Dunlap Drilling And Producing, Inc | Glenpool, OK 74033-4206 | Oil & Gas Operator | Apr 2026 |
| 8403 | Dunlap Exploration, Inc. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2016 |
| 8404 | Dunlap Oil Company | Bristow, OK 74010 | Oil & Gas Operator | Apr 2026 |
| 8405 | Dunlap Well Service Inc | Haskell, OK 74436 | Oil & Gas Operator | Sep 1993 |
| 8406 | Dunlap, Rodge | Olney, TX 76374 | Oil & Gas Operator | Aug 2002 |
| 8407 | Dunn Energy LLC | Skiatook, OK 74070-4046 | Oil Operator | Sep 2022 |
| 8408 | Dunn Exploration Company, LLC | | Oil & Gas Operator | Jan 2025 |
| 8409 | Dunn Joseph L | | Oil & Gas Operator | Dec 2025 |
| 8410 | Dunn Resources, LLC | Shreveport, LA 71115 | Oil & Gas Operator | Mar 2023 |
| 8411 | Dunne Equities I | | Oil & Gas Operator | Dec 1995 |
| 8412 | Dunne Equities Operating, Inc. | Houston, TX 77057 | Oil & Gas Operator | Aug 2022 |
| 8413 | Dunne Equities, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Apr 2014 |
| 8414 | Dunne Investments Operating, Inc. | Wichita, KS 67226 | Oil Operator | Mar 2002 |
| 8415 | Dunne Oil Co. | Wichita, KS 67202 | Oil Operator | Apr 1999 |
| 8416 | Dunne-Gardner Pe | | Oil & Gas Operator | Nov 1992 |
| 8417 | Dunne-Gardner Petroleum, Inc. | Wichita, KS 67202 | Gas Operator | Jun 2022 |
| 8418 | Dunnewold Farms LLC | Clymer, NY 14724 | Gas Operator | Dec 2024 |
| 8419 | Dunsmoor, David E. | Grand Junction, CO 81504 | Oil Operator | Jul 1998 |
| 8420 | Dupke Roger Oil Co Inc | Reno, OH 45773 | Oil & Gas Operator | Dec 2004 |
| 8421 | Duplantis Energy, LLC | Pleasanton, TX 78064 | Oil Operator | Jun 2026 |
| 8422 | Dupont Oil Company | | Oil Operator | Feb 1998 |
| 8423 | Dupree And Dupree | | Oil Operator | Dec 1998 |
| 8424 | Durango Energy Inc | Chickasha, OK 73023 | Oil Operator | Dec 1999 |
| 8425 | Durango Exploration LLC | Oklahoma City, OK 73120-5309 | Oil & Gas Operator | Apr 2026 |
| 8426 | Durango Operating Co., Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2002 |
| 8427 | Durango Operating LLC | Madison, MS 39110 | Oil & Gas Operator | Apr 2026 |
| 8428 | Durango Resources Corp. | Houston, TX 77043 | Oil & Gas Operator | Jun 2026 |
| 8429 | Durbin, Ronald R. | Moline, KS 67353 | Oil Operator | Dec 1988 |
| 8430 | Durham, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2016 |
| 8431 | Duroc Exploration LLC | Bixby, OK 74008 | Oil & Gas Operator | Mar 2026 |
| 8432 | Durossette Bill D | Haskell, OK 74436-1350 | Oil & Gas Operator | Jul 2004 |
| 8433 | Durossette Floyd R | Warner, OK 74469-0548 | Oil & Gas Operator | Apr 2011 |
| 8434 | Durossette Jr Jess | Haskell, OK 74436 | Oil Operator | Mar 2007 |
| 8435 | Durst Oil & Gas, Inc. | Point Pleasant, WV 25550 | Oil & Gas Operator | Dec 2021 |
| 8436 | Durst Oil Company | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Sep 2000 |
| 8437 | Dust Bowl Oil Company, Inc. | Spencerport, NY 14559 | Oil Operator | Dec 2024 |
| 8438 | Duster Production, Inc. | Refugio, TX 78377 | Oil & Gas Operator | Oct 2011 |
| 8439 | Dustin Energy Inc | Warren, OH 44481 | Oil & Gas Operator | Dec 2025 |
| 8440 | Dustin Enterprise | Olathe, KS 66062 | Oil Operator | Feb 1998 |
| 8441 | Dusty Drilling & Producing Corp | New Lexington, OH 43764-1552 | Oil & Gas Operator | Dec 2005 |
| 8442 | Dutch Ridge Gas Ventures, LLC | Charleston, WV 25339 | Oil & Gas Operator | Dec 2021 |
| 8443 | Dutton Bill J Oi | | Oil & Gas Operator | Oct 1992 |
| 8444 | Duty Oil & Gas Prod Co | Akron, OH 44306 | Oil & Gas Operator | Dec 1997 |
| 8445 | Duval Gas Gathering Corporation | Austin, TX 78711 | Oil & Gas Operator | Jun 2026 |
| 8446 | Dvi | | Oil Operator | Dec 2008 |
| 8447 | Dvy Energy LLC | Hadley, PA 16130-2320 | Oil & Gas Operator | Dec 2025 |
| 8448 | Dwarf Oil Company | | Oil & Gas Operator | Mar 2025 |
| 8449 | Dwayne'S Engineering | | Oil Operator | Dec 2025 |
| 8450 | Dwight A Tipton | Houston, TX 77208 | Oil & Gas Operator | Apr 2025 |
| 8451 | Dwight Tipton Et Al | Hobbs, NM 88240 | Oil & Gas Operator | Nov 2002 |
| 8452 | DWJS Inc | Oklahoma City, OK 73159 | Oil & Gas Operator | Sep 2024 |
| 8453 | DWP Oil & Gas | Wichita Falls, TX 76309 | Oil & Gas Operator | Jun 2026 |
| 8454 | Dyad Petroleum Company | Midland, TX 79710 | Oil & Gas Operator | Sep 2021 |
| 8455 | Dyco Petroleum Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2015 |
| 8456 | Dye Walter M | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2022 |
| 8457 | Dye, Jennifer J. | South Dayton, NY 14138 | Gas Operator | Dec 2024 |
| 8458 | Dyer Dale E Dba The Loving Company | Tulsa, OK 74107 | Oil & Gas Operator | Apr 2026 |
| 8459 | Dyer J G | | Oil & Gas Operator | May 1985 |
| 8460 | Dyer, Charles Wilbur | Longton, KS 67352 | Oil Operator | Jul 2025 |
| 8461 | Dyersdale Energy, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 8462 | Dyersdale Production Co, Inc. | Houston, TX 77019 | Oil & Gas Operator | Jun 2026 |
| 8463 | Dykes Oil Co. | | Oil Operator | Dec 2001 |
| 8464 | Dym Energy, Inc. | Celina, TX 75009 | Oil & Gas Operator | Apr 2018 |
| 8465 | Dynaco, Incorporated | | Oil & Gas Operator | Dec 1980 |
| 8466 | Dynamic Development Inc | | Oil & Gas Operator | Feb 2026 |
| 8467 | Dynamic Exploration PTRS, LLC | | Oil & Gas Operator | Nov 2024 |
| 8468 | Dynamic Exploration, Inc. | | Oil & Gas Operator | Oct 2003 |
| 8469 | Dynamic Offshore Res. NS, LLC | Houston, TX 77010 | Oil & Gas Operator | May 2010 |
| 8470 | Dynamic Offshore Resources, LLC | Houston, TX 77042 | Oil & Gas Operator | Jun 2026 |
| 8471 | Dynamic Petroleum Res., Inc. | Houston, TX 77068 | Oil & Gas Operator | Jul 1994 |
| 8472 | Dynamic Production, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2026 |
| 8473 | Dyne Exploration Company | Plano, TX 75093-6512 | Oil & Gas Operator | Apr 2020 |
| 8474 | Dyne Oil & Gas,Inc. | Borger, TX 79008 | Oil & Gas Operator | Dec 2017 |
| 8475 | Dyno Energy LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Apr 2026 |
| 8476 | Dyson Energy Operating, LLC | Bryan, TX 77802 | Oil & Gas Operator | Jun 2018 |
| 8477 | Dzurik Interests, Inc. | | Oil & Gas Operator | Dec 2024 |
| 8478 | E & B Equipment | Liberty, TX 77575 | Oil & Gas Operator | Feb 2010 |
| 8479 | E & B Natural Resources Management | Guilderland Centek, NY 12085 | Oil & Gas Operator | Apr 2026 |
| 8480 | E & B Natural Resources Management Corporation | Hays, KS 67601 | Oil & Gas Operator | Dec 2025 |
| 8481 | E & E Construction Company | Wichita Falls, TX 76308 | Oil Operator | Jun 2026 |
| 8482 | E & E Drilling Co., Inc. | Wichita Falls, TX 76308 | Oil Operator | Jun 2026 |
| 8483 | E & E Enterprises | Enid, OK 73703-1420 | Oil & Gas Operator | Nov 2014 |
| 8484 | E & E Oil | | Oil Operator | Dec 2019 |
| 8485 | E & E Production Company, Inc. | | Oil & Gas Operator | Dec 2004 |
| 8486 | E & G Wells Rehab Project LLC | Houston, TX 77071 | Oil Operator | Jun 2026 |
| 8487 | E & R Oil | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2026 |
| 8488 | E & S Operating Company | Caddo, TX 76429 | Oil & Gas Operator | Feb 2018 |
| 8489 | E & S Production Corp. | | Oil & Gas Operator | Dec 1988 |
| 8490 | E & S Resources LLC | Crescent, OK 73028 | Oil & Gas Operator | Feb 2026 |
| 8491 | E & T Limited Liability Co. | | Oil & Gas Operator | Dec 2025 |
| 8492 | E & W Oil, Inc. | Seguin, TX 78155 | Oil & Gas Operator | Jun 2026 |
| 8493 | E & W Production | Olney, TX 76374 | Oil & Gas Operator | Aug 2018 |
| 8494 | E G Operating Co | Austin, TX 78746 | Oil & Gas Operator | Jun 1997 |
| 8495 | E I C Inc | Coshocton, OH 43812 | Oil & Gas Operator | Dec 1984 |
| 8496 | E K Energy LLC | Colony, KS 66015 | Oil Operator | Feb 2026 |
| 8497 | E L Fundingsland | Littleton, CO 80160 | Oil & Gas Operator | Jun 2016 |
| 8498 | E L M Oil Company | Lockhart, TX 78644 | Oil & Gas Operator | May 2000 |
| 8499 | E Lee Mills | | Oil Operator | Aug 1987 |
| 8500 | E Lyle Johnson Inc | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2026 |