| 7001 | D & H Oil | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2022 |
| 7002 | D & H Oil Inc | Garber, OK 73738-0657 | Oil & Gas Operator | Apr 2021 |
| 7003 | D & H Production, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2024 |
| 7004 | D & J Investment | | Oil Operator | Jun 1995 |
| 7005 | D & J Investments | | Oil Operator | Dec 2009 |
| 7006 | D & J Oil Company | Kermit, TX 79745 | Oil & Gas Operator | Jun 2026 |
| 7007 | D & J Oil Company Of Okla Inc | Enid, OK 73706-0129 | Oil & Gas Operator | May 1999 |
| 7008 | D & J Producing Company | | Oil Operator | Sep 2006 |
| 7009 | D & J Tank Trucks Inc | Drumright, OK 74030 | Oil Operator | Apr 2026 |
| 7010 | D & K Supply Inc | East Canton, OH 44730 | Oil & Gas Operator | Dec 2002 |
| 7011 | D & L Energy | Morland, KS 67650 | Oil Operator | Mar 1995 |
| 7012 | D & L Energy Inc | Canton, OH 44718 | Oil & Gas Operator | Dec 2016 |
| 7013 | D & L Operating Co. | Bangs, TX 76823 | Oil & Gas Operator | Nov 2022 |
| 7014 | D & L Operating LLC | Morris, OK 74445 | Oil & Gas Operator | Mar 2026 |
| 7015 | D & L Partnership | Rhome, TX 76078 | Oil Operator | May 1987 |
| 7016 | D & M Company | Rockdale, TX 76567 | Oil & Gas Operator | Mar 2008 |
| 7017 | D & M Enterprises Inc | Lancaster, OH 43130 | Oil & Gas Operator | Dec 1991 |
| 7018 | D & M Oil, Inc. | Winfield, KS 67156 | Oil Operator | Apr 2001 |
| 7019 | D & M Production Co Inc | Drumright, OK 74030 | Oil & Gas Operator | Mar 2026 |
| 7020 | D & M Welding LLC | Kevin, MT 59454 | Oil & Gas Operator | Mar 2026 |
| 7021 | D & N Oil Co. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 7022 | D & N Operating Corp | Belpre, OH 45714-8181 | Oil & Gas Operator | Dec 2019 |
| 7023 | D & P Operating & Prod. Corp. | Cedar Park, TX 78613 | Oil & Gas Operator | Dec 2003 |
| 7024 | D & P Tank Service, Inc. | | Oil Operator | Mar 2000 |
| 7025 | D & R Energy | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 7026 | D & R Enterprises | Eastland, TX 76448 | Oil & Gas Operator | Oct 2020 |
| 7027 | D & R Oil Properties | | Oil Operator | May 1998 |
| 7028 | D & R Oil, Inc. | Galva, KS 67443 | Oil & Gas Operator | Jul 2025 |
| 7029 | D & R Well Service, Inc. | Galva, KS 67443 | Oil & Gas Operator | Jan 2026 |
| 7030 | D & S Energy Corp | Tiona, PA 16352-0102 | Oil & Gas Operator | Dec 2018 |
| 7031 | D & S Oil Co. #1 | Borger, TX 79007 | Oil & Gas Operator | Jun 2026 |
| 7032 | D & S Oil Company | Corsicana, TX 75151 | Oil & Gas Operator | Jun 2026 |
| 7033 | D & S Operating | Texhoma, OK 73949 | Oil & Gas Operator | May 2001 |
| 7034 | D & T Company | | Oil & Gas Operator | Jun 1983 |
| 7035 | D & T Oil | Bremen, OH 43107 | Oil & Gas Operator | Dec 2011 |
| 7036 | D & T Oil Company | Hays, KS 67601 | Oil Operator | Oct 2025 |
| 7037 | D & T Swabbing & Well Serv Inc | Hennessey, OK 73742-0124 | Oil & Gas Operator | Dec 2025 |
| 7038 | D & V Oil Co., LP | San Angelo, TX 76909 | Oil & Gas Operator | Jan 2019 |
| 7039 | D & V Petroleum Corporation | | Oil & Gas Operator | May 1992 |
| 7040 | D & W Oil & Gas Co. | | Gas Operator | Jan 1990 |
| 7041 | D & W Oil Compan | | Oil Operator | Jan 1987 |
| 7042 | D & W Trucking Company | De Berry, TX 75639 | Oil Operator | Mar 2003 |
| 7043 | D & Z Exploration, Inc. | St Elmo, IL 62458 | Oil Operator | Feb 2026 |
| 7044 | D And B Brine Inc | | Oil Operator | Apr 2026 |
| 7045 | D And B Oil | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 7046 | D B D Oil & Gas Company | Houston, TX 77001 | Oil & Gas Operator | Mar 2015 |
| 7047 | D C Bintliff & W W F Oil Corp. | | Oil & Gas Operator | Dec 1989 |
| 7048 | D C Energy | Tulsa, OK 74137 | Oil Operator | Jun 2009 |
| 7049 | D C Energy, Inc. | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2020 |
| 7050 | D C Oil Company, Inc. | Sundown, TX 79372 | Oil & Gas Operator | Jun 2026 |
| 7051 | D C Oil, Inc | Whitesville, KY 42378 | Oil Operator | Dec 2017 |
| 7052 | D D Natural Resources LLC | | Oil & Gas Operator | Mar 2026 |
| 7053 | D G D Oil Co. | Imperial, TX 79743 | Oil & Gas Operator | Jun 2026 |
| 7054 | D H & L Operating, Inc. | | Oil & Gas Operator | Sep 1983 |
| 7055 | D H Hunt | Dallas, TX 75201 | Oil & Gas Operator | Dec 1994 |
| 7056 | D J Oil Operations | | Oil Operator | Dec 2009 |
| 7057 | D J Production | Pasadena, TX 77502 | Oil & Gas Operator | Mar 2025 |
| 7058 | D J Simmons, Inc | Farmington, NM 87499 | Oil & Gas Operator | Apr 2020 |
| 7059 | D K Cook Heirs LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2011 |
| 7060 | D K Oil Services LLC | Wellsville, KS 66092 | Oil Operator | Nov 2019 |
| 7061 | D L Operating | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 7062 | D M Norman | Midland, TX 79701 | Oil & Gas Operator | Jan 2003 |
| 7063 | D N Stover Inc | Knox, PA 16232-0810 | Oil & Gas Operator | Dec 2015 |
| 7064 | D O Walker Inc | Stratford, OK 74872 | Oil Operator | Jan 2026 |
| 7065 | D Oil, Inc. | Victoria, KS 67671 | Oil Operator | Feb 2026 |
| 7066 | D R & D Co | Warren, PA 16365-2302 | Oil Operator | Dec 2025 |
| 7067 | D S & W Well Ser | | Oil Operator | Nov 1996 |
| 7068 | D S & W Well Servicing, Inc. | Great Bend, KS 67530 | Oil & Gas Operator | Dec 2019 |
| 7069 | D T E Gas And Oil Co | | Gas Operator | May 2007 |
| 7070 | D T E Gas Company | | Oil & Gas Operator | Jun 1999 |
| 7071 | D U Investments | Salina, KS 67401 | Oil & Gas Operator | Dec 2009 |
| 7072 | D W Energy, LLC | Dunbar, WV 25064 | Oil & Gas Operator | Dec 2021 |
| 7073 | D&D Energy Company | N.Canton, OH 44721 | Oil & Gas Operator | Dec 2020 |
| 7074 | D&H-S-S Production Co.,Inc | Corpus Chrsti, TX 78409 | Oil & Gas Operator | Aug 2003 |
| 7075 | D&M Operating, L.L.C. | Corpus Chrsti, TX 78414 | Gas Operator | Jun 2026 |
| 7076 | D&S Oil & Gas Operators, Inc. | | Oil & Gas Operator | Dec 2020 |
| 7077 | D&S Oil And Gas Properties | San Angelo, TX 76902 | Oil & Gas Operator | Jun 2026 |
| 7078 | D'Amato, Giovanni C. | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 7079 | D-B-K Operating Company | | Oil Operator | Jan 2006 |
| 7080 | D-Bar Leasing, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2022 |
| 7081 | D-D Oil | Woodsfield, OH 43793 | Oil & Gas Operator | Dec 2018 |
| 7082 | D-Mil Production Inc | Argyle, TX 76226 | Oil & Gas Operator | Jun 2026 |
| 7083 | D-O-R Lease Service, Inc. | | Oil & Gas Operator | Mar 2009 |
| 7084 | D-Oil Incorporat | | Oil Operator | Aug 1990 |
| 7085 | D-Pex Operating Company | | Oil & Gas Operator | Sep 2004 |
| 7086 | D-Ram Construction Co., Inc. | | Gas Operator | Dec 1990 |
| 7087 | D-S-B Properties, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2014 |
| 7088 | D-S-B Properties, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2026 |
| 7089 | D-T Development Company | Richardson, TX 75081 | Oil & Gas Operator | Sep 2002 |
| 7090 | D-Tec Well Production LLC | | Oil Operator | Dec 2024 |
| 7091 | D. A. Biglane Operating Co Et Al | | Oil Operator | Feb 2004 |
| 7092 | D. & D. Operating Account | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2009 |
| 7093 | D. A. B. Oil Service, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Nov 2012 |
| 7094 | D. A. Biglane | | Oil & Gas Operator | Feb 1990 |
| 7095 | D. A. Milton | | Oil & Gas Operator | Dec 2016 |
| 7096 | D. A. Stark | | Oil Operator | Dec 1990 |
| 7097 | D. B. Braddock | | Oil & Gas Operator | Jan 1986 |
| 7098 | D. B. Braddock-Kisatchie Res. | | Oil & Gas Operator | Jan 1985 |
| 7099 | D. B. McClinton | | Oil & Gas Operator | Jun 1992 |
| 7100 | D. B. McConnell | | Oil & Gas Operator | Oct 1991 |