| 8001 | Doggy Oil Corp | Decatur, GA 30031 | Oil & Gas Operator | Jun 2026 |
| 8002 | Dogwood Operating Company, Inc. | Houston, TX 77069 | Oil & Gas Operator | Jun 2026 |
| 8003 | Dol Resources Inc | Rowlett, TX 75088 | Oil & Gas Operator | Apr 2026 |
| 8004 | Dolberry Energy Resources Corp. | Dallas, TX 75252 | Oil Operator | Jun 2026 |
| 8005 | Dolch Production, Inc. | San Antonio, TX 78248 | Oil & Gas Operator | Jul 1996 |
| 8006 | Dole Enterprises Inc. | | Oil & Gas Operator | Mar 2026 |
| 8007 | Dolezal George Jr | Littleton, CO 80163 | Oil & Gas Operator | Sep 2006 |
| 8008 | Dolinar, Michael J. | Angola, NY 14006 | Gas Operator | Dec 2024 |
| 8009 | Dolphin Energy LLC | Lake Worth, FL 33467 | Oil & Gas Operator | Feb 2026 |
| 8010 | Dolphin Petroleum | Alice, TX 78333 | Oil & Gas Operator | Jun 2008 |
| 8011 | Dolphin Petroleum, LP | Alice, TX 78333 | Oil & Gas Operator | Jun 2026 |
| 8012 | Domac Oil Company Inc | Perkins, OK 74059-0642 | Oil & Gas Operator | Feb 2006 |
| 8013 | Domar Oil & Gas | | Gas Operator | May 1995 |
| 8014 | Domar Oil & Gas Inc | Liberal, KS 67905 | Oil & Gas Operator | Oct 2000 |
| 8015 | Dome De Sel LLC | | Oil & Gas Operator | Nov 2024 |
| 8016 | Dome Drilling Co | Westlake, OH 44145-1964 | Oil & Gas Operator | Dec 2009 |
| 8017 | Dome Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 2016 |
| 8018 | Dome Producing | Cleveland, OH 44114 | Oil & Gas Operator | Dec 1988 |
| 8019 | Domestic Energy Corporation | | Oil Operator | Jan 1988 |
| 8020 | Domestic Oil & Gas Co | Bedford, OH 44146 | Oil & Gas Operator | Dec 1990 |
| 8021 | Domestic Oil Producers | | Oil Operator | Oct 1980 |
| 8022 | Domestic Oil Producers,Inc. | | Oil Operator | Oct 1998 |
| 8023 | Domestic Oil Production | | Oil & Gas Operator | Oct 1989 |
| 8024 | Dominguez Energy L.P. | | Oil & Gas Operator | Dec 2000 |
| 8025 | Dominguez Properties | | Oil & Gas Operator | Dec 1991 |
| 8026 | Dominion Corporation | Houston, TX 77001 | Oil & Gas Operator | Dec 2010 |
| 8027 | Dominion Energy Transmission, Inc. | | Oil & Gas Operator | Dec 2019 |
| 8028 | Dominion Exp Midcontinent Inc | Oklahoma City, OK 73134-2616 | Oil & Gas Operator | Oct 2024 |
| 8029 | Dominion Exploration & Production Inc | Houston, TX 77060 | Oil & Gas Operator | Apr 2015 |
| 8030 | Dominion Field Services Inc | Richmond, VA 23219 | Oil & Gas Operator | Dec 2013 |
| 8031 | Dominion Midstream Services, LP | | Oil Operator | Dec 2006 |
| 8032 | Dominion Midwest Energy Inc | | Oil & Gas Operator | Dec 2007 |
| 8033 | Dominion Minerals Corporation | Houston, TX 77014 | Oil & Gas Operator | Nov 2009 |
| 8034 | Dominion Natural Resources LLC | Dallas, TX 75367 | Oil & Gas Operator | Jun 2026 |
| 8035 | Dominion Ok TX E & P Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Nov 2018 |
| 8036 | Dominion Oklahoma Texas E&P, Inc | Richmond, VA 23219 | Oil & Gas Operator | Sep 2018 |
| 8037 | Dominion Oklahoma Texas Expl & Prod Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Aug 2013 |
| 8038 | Dominion Oklahoma Texas Exploration & Production | Houston, TX 77060 | Oil & Gas Operator | Dec 2006 |
| 8039 | Dominion Operating, LLC | Midland, TX 79708 | Oil Operator | Mar 2018 |
| 8040 | Dominion Production Company, LLC | Tampa, FL 33606 | Oil & Gas Operator | Jun 2026 |
| 8041 | Dominion Resources, Inc | Staffordsville, KY 41256 | Oil & Gas Operator | Dec 2024 |
| 8042 | Dominiq Operating, Inc | Scurry, TX 75158 | Oil Operator | Dec 2023 |
| 8043 | Domino Operations, Inc. | Abilene, TX 79603 | Oil & Gas Operator | Jun 2026 |
| 8044 | Domino Prod Services Inc | Bellville, TX 77418 | Oil & Gas Operator | Feb 2004 |
| 8045 | Dominy Oil Co., Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Oct 1999 |
| 8046 | Don Bar Investment Company | Windthorst, TX 76389 | Oil & Gas Operator | Feb 2004 |
| 8047 | Don Byers Oil & Gas LLC | Heath, OH 43056 | Oil & Gas Operator | Dec 2025 |
| 8048 | Don Erbert Oil Company | | Oil Operator | Oct 2013 |
| 8049 | Don G. Wiley, Jr. | | Oil Operator | Dec 1979 |
| 8050 | Don Karst Well Service, Inc. | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 8051 | Don Peterson Company, LLC - | Loving, TX 76460 | Oil Operator | Jun 2026 |
| 8052 | Don R Ormand | Midland, TX 79702 | Oil & Gas Operator | Jun 2014 |
| 8053 | Don Sims Oil | | Oil Operator | Feb 2026 |
| 8054 | Don Townes | | Oil Operator | Sep 2000 |
| 8055 | Don W. Holcomb | | Oil Operator | Feb 1996 |
| 8056 | Don Webb | | Oil Operator | Mar 1984 |
| 8057 | Don Yohe Enterprises And Devonian Energy Inc | | Gas Operator | Dec 1999 |
| 8058 | Don Yohe Enterprises Inc. | Armada, MI 48005 | Oil & Gas Operator | Apr 2018 |
| 8059 | Don'S Oil Company Inc | Oxford, KS 67119-0006 | Oil Operator | Apr 2011 |
| 8060 | Don-Dale, Inc. | Clarksville, TX 75426 | Oil & Gas Operator | Aug 2003 |
| 8061 | Donaker Alan M | Warsaw, OH 43844 | Oil & Gas Operator | Dec 1994 |
| 8062 | Donald & Danny Dews Production | | Oil Operator | Jan 2025 |
| 8063 | Donald C Slawson Expl Co. Inc | | Oil & Gas Operator | Dec 2020 |
| 8064 | Donald C. Ring Revocable Trust | Sebring, FL 33875 | Gas Operator | Dec 2024 |
| 8065 | Donald C. Slawson | | Oil Operator | Jun 1985 |
| 8066 | Donald E & Janet L Rearick | Ford City, PA 16226-9801 | Gas Operator | Dec 2025 |
| 8067 | Donald J. Zadeck | | Oil & Gas Operator | Feb 1998 |
| 8068 | Donald Len Barreth | | Oil & Gas Operator | Dec 1991 |
| 8069 | Donald Owens | | Oil & Gas Operator | Dec 2024 |
| 8070 | Donaldson Richard E | Bartlesville, OK 74005-0032 | Oil & Gas Operator | Nov 2005 |
| 8071 | Donalu Oil | Pampa, TX 79066 | Oil & Gas Operator | Jan 2026 |
| 8072 | Doneghy James | Wellington, TX 79095 | Oil & Gas Operator | May 2013 |
| 8073 | Donke Oil & Gas, LLC | Tulsa, OK 74137 | Oil & Gas Operator | Mar 2018 |
| 8074 | Donn G. Thompson, Et Al | | Oil Operator | Apr 1987 |
| 8075 | Donna Lee Oil Co | Independence, KS 67301 | Oil & Gas Operator | Apr 2014 |
| 8076 | Donna-Lynne Oil Co. | George West, TX 78022 | Oil & Gas Operator | Jun 2018 |
| 8077 | Donnell Pipe & Supply Co/TX Corp | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2008 |
| 8078 | Donnell, Bill | Graham, TX 76450 | Oil & Gas Operator | May 1995 |
| 8079 | Donnell, Louis, Jr. | South Bend, TX 76481 | Oil & Gas Operator | Mar 2008 |
| 8080 | Donnelly Casing Pulling Co | | Oil Operator | Aug 2020 |
| 8081 | Donnie R. Morrow | | Oil Operator | Dec 2024 |
| 8082 | Donny Joe Barnhill | | Gas Operator | Dec 2024 |
| 8083 | Donoco Oil Company | La Vernia, TX 78121 | Oil & Gas Operator | Jun 2026 |
| 8084 | Donovan Joe D Or L P McElwaine | Tulsa, OK 74119 | Gas Operator | Jan 2014 |
| 8085 | Donray Petroleum LLC | Choctaw, OK 73020 | Oil & Gas Operator | Mar 2026 |
| 8086 | Donson Corporation | Edmond, OK 73083-0341 | Oil & Gas Operator | Jul 1997 |
| 8087 | Doodlebug Oil Co | | Oil Operator | Jun 2006 |
| 8088 | Doolaree Corporation | Sherman, TX 75091 | Oil & Gas Operator | Jun 2026 |
| 8089 | Dooley, Jeff | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2012 |
| 8090 | Doonan & Sons In | | Oil Operator | Apr 1995 |
| 8091 | Doonan And Sons, Inc. | Great Bend, KS 67530 | Oil Operator | Apr 2021 |
| 8092 | Dora Inc | Levelland, TX 79336 | Oil & Gas Operator | Jul 2019 |
| 8093 | Dorado Drilling, Inc. | Gulfport, MS 39501 | Oil & Gas Operator | Jun 2026 |
| 8094 | Dorado E & P Partners LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 8095 | Dorado Energy LLC | Edmond, OK 73012 | Oil & Gas Operator | Jan 2021 |
| 8096 | Dorado Gas Resources LLC | Centennial, CO 80112 | Oil & Gas Operator | Jul 2009 |
| 8097 | Dorado Oil Company | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Oct 2013 |
| 8098 | Dorado Operating Inc. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2011 |
| 8099 | Doral Energy Corp. | Midland, TX 79708 | Oil & Gas Operator | Jun 2012 |
| 8100 | Doralex Energy I | | Oil & Gas Operator | Feb 1995 |