| 12001 | Great American Exploration, Inc. | | Oil Operator | Feb 1979 |
| 12002 | Great American Resources Inc. | Bowie, TX 76230 | Oil & Gas Operator | Apr 2025 |
| 12003 | Great American Royalties, Inc. | | Oil Operator | Mar 2025 |
| 12004 | Great Basin Petroleum Serv, Inc. | Odessa, TX 79765 | Oil & Gas Operator | Nov 2002 |
| 12005 | Great Basin Petroleum Serv, L.P. | Odessa, TX 79765 | Oil & Gas Operator | Jul 2008 |
| 12006 | Great Basin Well Service Corp. | Odessa, TX 79765 | Oil & Gas Operator | Feb 2025 |
| 12007 | Great Basins Petroleum Co. | | Gas Operator | Mar 2015 |
| 12008 | Great Bay Operations, LLC | Portsmouth, NH 03801 | Oil & Gas Operator | Nov 2016 |
| 12009 | Great Bend Oil P | | Oil Operator | Jun 1991 |
| 12010 | Great Eastern En | | Oil & Gas Operator | Nov 1995 |
| 12011 | Great Eastern Energy & Dev. Corp. | Midland, TX 79701 | Oil & Gas Operator | Jul 2008 |
| 12012 | Great Horned Owls, LLC | Katy, TX 77494 | Oil & Gas Operator | Jan 2025 |
| 12013 | Great Lakes Chemical Corporation | West Lafayette, IN 47906 | Oil & Gas Operator | Nov 2023 |
| 12014 | Great Lakes Conf. Of The Evangelical Covenant | Dewittville, NY 14728 | Gas Operator | Dec 2023 |
| 12015 | Great Lakes Niagaran Inc | | Oil & Gas Operator | Mar 1988 |
| 12016 | Great Lakes Petroleum Producers Inc | | Oil Operator | Apr 2025 |
| 12017 | Great Northern Drilling Company | Billings, MT 59103 | Oil & Gas Operator | Jun 2016 |
| 12018 | Great Northern Energy, Inc | Irving, TX 75039 | Oil & Gas Operator | Apr 2025 |
| 12019 | Great Northern Gas Company | Denver, CO 80293-0602 | Oil & Gas Operator | Jul 2017 |
| 12020 | Great Oak Energy, Inc. | Oakmont, PA 15139-2003 | Oil & Gas Operator | Feb 2021 |
| 12021 | Great Plains Energy, Inc. | Lincoln, NE 68516 | Oil & Gas Operator | Dec 2024 |
| 12022 | Great Plains Exploration LLC | Mentor, OH 44060 | Oil & Gas Operator | Dec 2016 |
| 12023 | Great Plains Oil & Gas | Ada, OK 74820-7209 | Oil & Gas Operator | May 2013 |
| 12024 | Great Plains Oper LLC Dba Great MTN Oper | Grapevine, TX 76051-5477 | Gas Operator | Nov 2015 |
| 12025 | Great Plains Operating Inc | Bristow, OK 74010 | Oil & Gas Operator | Dec 1998 |
| 12026 | Great Plains Operating, LLC. | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2014 |
| 12027 | Great Plains Pet | | Oil & Gas Operator | Mar 1995 |
| 12028 | Great Plains Petroleum, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Dec 2024 |
| 12029 | Great Plains Pipeline Company | Tulsa, OK 74135-6405 | Oil & Gas Operator | Jul 2014 |
| 12030 | Great Plains Resources, Inc. | Nixon, TX 78140 | Oil & Gas Operator | Apr 2025 |
| 12031 | Great River Oil & Gas Corp. | | Oil & Gas Operator | Sep 1998 |
| 12032 | Great Scott, Inc. | | Oil & Gas Operator | Oct 1993 |
| 12033 | Great Southern - Joe Scates | | Oil Operator | Dec 1979 |
| 12034 | Great Southern Oil &Gas Co Inc | | Oil & Gas Operator | Dec 2004 |
| 12035 | Great Southern-Caddo-Lyons | | Oil & Gas Operator | Sep 1982 |
| 12036 | Great Southwestern Expl Inc | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2025 |
| 12037 | Great Texas Crude Inc. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Apr 2025 |
| 12038 | Great Valley Petroleum Inc. | | Oil & Gas Operator | Dec 1994 |
| 12039 | Great West Energy & Expl., Inc. | Addison, TX 75001 | Oil & Gas Operator | Mar 2008 |
| 12040 | Great West Operating Co., Inc. | Dallas, TX 75240 | Oil & Gas Operator | Aug 2003 |
| 12041 | Great Western Drilling | | Oil Operator | Dec 2002 |
| 12042 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 12043 | Great Western Equipment Co | Mustang, OK 73064 | Oil & Gas Operator | Jan 2025 |
| 12044 | Great Western Land Co Inc | Tulsa, OK 74136-1517 | Oil & Gas Operator | Jun 2000 |
| 12045 | Great Western Oil Company | | Oil & Gas Operator | Dec 1984 |
| 12046 | Great Western Onshore Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 12047 | Great Western Operating Company LLC | | Oil & Gas Operator | Aug 2022 |
| 12048 | Great Western Resources Inc | | Oil & Gas Operator | Dec 1989 |
| 12049 | Great Yellowstone Corp. | | Oil & Gas Operator | Apr 1993 |
| 12050 | Greatbatch LTD. | Clarence, NY 14031 | Gas Operator | Dec 2023 |
| 12051 | Grecian Gas Company | | Gas Operator | Dec 2002 |
| 12052 | Greco Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 12053 | Greco Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 12054 | Greehey And Company LTD | San Antonio, TX 78216 | Oil & Gas Operator | May 2020 |
| 12055 | Greeley, John A. | Eldred, PA 16731 | Oil & Gas Operator | Dec 2023 |
| 12056 | Green Century Exp & Prod, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2025 |
| 12057 | Green Earth Resources Inc. | | Oil & Gas Operator | Dec 2020 |
| 12058 | Green Energy Company | Okmulgee, OK 74447 | Oil & Gas Operator | May 2013 |
| 12059 | Green Energy Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2024 |
| 12060 | Green Enterprises | | Oil Operator | Dec 2024 |
| 12061 | Green Exploration Company | Austin, TX 78711 | Oil & Gas Operator | Apr 2025 |
| 12062 | Green Gas Co | Wooster, OH 44691 | Oil & Gas Operator | Dec 2020 |
| 12063 | Green J R & Jerr | | Oil Operator | Dec 1991 |
| 12064 | Green Light Operating, LLC. | Austin, TX 78746 | Oil Operator | Apr 2025 |
| 12065 | Green Oil & Gas, Inc. | Winters, TX 79567 | Oil & Gas Operator | Aug 2003 |
| 12066 | Green Oilfield Production L.L.C. | Jennings, KS 67643 | Oil Operator | Dec 2024 |
| 12067 | Green Oper Compa | | Gas Operator | Dec 1969 |
| 12068 | Green Operating | | Oil Operator | Jun 2010 |
| 12069 | Green Operating Company, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2024 |
| 12070 | Green Petroleum Company | Archer City, TX 76351 | Oil & Gas Operator | Nov 1996 |
| 12071 | Green Production, LLC | | Oil & Gas Operator | Dec 2016 |
| 12072 | Green Reserve Energy Holdings LLC | Houston, TX 77077 | Oil & Gas Operator | Mar 2025 |
| 12073 | Green River Exploration Co | Tulsa, OK 74121-1468 | Oil & Gas Operator | Sep 2011 |
| 12074 | Green River Gas Co, Inc | | Oil & Gas Operator | Dec 2010 |
| 12075 | Green River Operating Co Inc | Noble, OK 73068-5521 | Oil & Gas Operator | Feb 2018 |
| 12076 | Green River Resources Inc. | Keystone, CO 80435 | Oil & Gas Operator | Apr 2025 |
| 12077 | Green Star | Somerset, TX 78069 | Oil Operator | Apr 2025 |
| 12078 | Green Valley Disposal Serv LLC | Alva, OK 73717 | Oil Operator | Feb 2025 |
| 12079 | Green Valley Operating, LLC | Billings, MT 59108 | Oil & Gas Operator | Feb 2025 |
| 12080 | Green Wells Venture LLC | Miami, FL 33131 | Gas Operator | Dec 2023 |
| 12081 | Green William G | Jenks, OK 74037-3233 | Oil & Gas Operator | Apr 2020 |
| 12082 | Green'S Drillng & Mud Ser Inc | Konawa, OK 74849 | Oil Operator | Jan 2013 |
| 12083 | Green, Bobbie | Chautauqua, KS 67334 | Oil Operator | Dec 2024 |
| 12084 | Green, Hugh | Albany, TX 76430 | Oil & Gas Operator | Apr 2012 |
| 12085 | Green, J. R. | Hays, KS 67601 | Oil Operator | Mar 2005 |
| 12086 | Green, Michael Oil | Albany, TX 76430 | Oil Operator | Apr 2025 |
| 12087 | Green, Robert W | Ottawa, KS 66067 | Oil Operator | Nov 1987 |
| 12088 | Green, Roy W. Oil & Gas | San Angelo, TX 76902 | Oil & Gas Operator | Jun 2021 |
| 12089 | Greenbriar Energy Inc. | Houston, TX 77098 | Oil & Gas Operator | Feb 2004 |
| 12090 | Greenbrier Energy Inc | Marietta, OH 45750 | Oil & Gas Operator | Dec 2024 |
| 12091 | Greenbrier Oper. Co. | Dallas, TX 75229 | Oil & Gas Operator | Feb 2001 |
| 12092 | Greene David L II LLC | Bartlesville, OK 74005 | Oil Operator | Jan 2025 |
| 12093 | Greene Energy LLC | Pittsburgh, PA 15241-1405 | Gas Operator | Dec 2006 |
| 12094 | Greene Enterprises, Inc. | Gillette, WY 82717 | Oil Operator | Dec 2009 |
| 12095 | Greene Mary E | Springboro, PA 16435-1635 | Oil & Gas Operator | Dec 2014 |
| 12096 | Greene, R. E. | Baird, TX 79504 | Oil & Gas Operator | Jun 2009 |
| 12097 | Greene, Sheldon K. | Bolivar, NY 14715 | Oil & Gas Operator | Dec 2023 |
| 12098 | Greene, Steven | Le Roy, NY 14482 | Gas Operator | Dec 2023 |
| 12099 | Greene, Vernon | Levelland, TX 79336 | Oil & Gas Operator | May 2002 |
| 12100 | Greenfield Baptist CH | North East, PA 16428-5610 | Gas Operator | Dec 2024 |