| 901 | Gravel & Troegel-Petrofunds | | Oil & Gas Operator | Mar 1984 |
| 902 | Gravelle Family Trust | | Oil & Gas Operator | Dec 1999 |
| 903 | Graves Drilling | | Oil & Gas Operator | Sep 1995 |
| 904 | Graves Drilling Co., Inc. | Wichita, KS 67208 | Oil & Gas Operator | Mar 2025 |
| 905 | Graves J M | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2007 |
| 906 | Graves John G Oil Prop Inc | Tulsa, OK 74116-5666 | Oil & Gas Operator | Feb 2001 |
| 907 | Graves Oil Company | Ardmore, OK 73401 | Oil Operator | Apr 2014 |
| 908 | Graves Operating | Perryton, TX 79070 | Oil & Gas Operator | Jul 2005 |
| 909 | Graves Operating, LLC | Perryton, TX 79070 | Oil & Gas Operator | Jul 2025 |
| 910 | Gravley Bill | Duncan, OK 73533 | Oil Operator | Nov 1998 |
| 911 | Gravtro, Inc. | | Oil Operator | Apr 1986 |
| 912 | Graward Operating, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Jul 2025 |
| 913 | Gray Development Co. LLC | | Oil & Gas Operator | May 2025 |
| 914 | Gray Energy Corporation | | Oil & Gas Operator | May 1987 |
| 915 | Gray Fox Operating Company | Tulsa, OK 74119 | Oil Operator | May 1993 |
| 916 | Gray Lloyd Energy Inc | Oklahoma City, OK 73120-8112 | Oil & Gas Operator | Nov 2005 |
| 917 | Gray Oil & Gas Inc. | Abilene, TX 79606 | Oil & Gas Operator | Oct 2013 |
| 918 | Gray Operating Company, Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2018 |
| 919 | Gray Pipeline Inc | Broomfield, CO 80023-8304 | Oil & Gas Operator | Jul 2018 |
| 920 | Gray Production Trust | Dallas, TX 75261 | Oil & Gas Operator | Jul 2003 |
| 921 | Gray, Gordon Operator | Snyder, TX 79550 | Oil & Gas Operator | Jul 2025 |
| 922 | Gray, Jimmy W | | Oil & Gas Operator | Aug 1998 |
| 923 | Gray, Mark W. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Aug 2003 |
| 924 | Gray, Robert Leon | FT Stockton, TX 79735 | Oil & Gas Operator | Feb 2000 |
| 925 | Gray, W. H. Operating | Odessa, TX 79762 | Oil Operator | Jul 2025 |
| 926 | Graybol-Patton C | | Oil & Gas Operator | Oct 1991 |
| 927 | Graycliff Conservancy, Inc. | Derby, NY 14047 | Gas Operator | Dec 2024 |
| 928 | Grayco Energy Explor. Inc. | | Oil & Gas Operator | Dec 2010 |
| 929 | Grayhawk Operating, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2006 |
| 930 | Grayhorse Operating Inc | Tulsa, OK 74103-4439 | Oil & Gas Operator | Apr 2025 |
| 931 | Grayling Oil Inc | | Oil & Gas Operator | Feb 1995 |
| 932 | Grayling Resources LTD | Lakewood, CO 80235 | Oil & Gas Operator | Jul 2020 |
| 933 | Graymarr LLC | Graysville, OH 45734 | Oil & Gas Operator | Dec 2024 |
| 934 | Grayrock Corp., The | Dallas, TX 75243 | Oil & Gas Operator | Dec 1999 |
| 935 | Grayrock Energy II, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Jul 2025 |
| 936 | Grayrock Energy, LLC | Fort Worth, TX 76114 | Oil & Gas Operator | Apr 2025 |
| 937 | Grayson Mill Operating LLC | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 938 | Grayson Operating LLC | Ada, OK 74820 | Oil & Gas Operator | Apr 2025 |
| 939 | Grayson Petroleum Company | Whitesboro, TX 76273 | Oil & Gas Operator | Jul 2025 |
| 940 | Grayson Service Inc. | | Oil & Gas Operator | May 2025 |
| 941 | Graystone Energy Corporation | Judson, TX 75660 | Oil & Gas Operator | Jul 2025 |
| 942 | Graystone Exploration Corp. | Garland, TX 75043 | Oil & Gas Operator | Aug 2003 |
| 943 | GRB Properties, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2003 |
| 944 | GRB Resources | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2004 |
| 945 | Grease Exploration Incorporated | | Oil & Gas Operator | Dec 2024 |
| 946 | Greasewood Oil Company | Midland, TX 79705 | Oil & Gas Operator | Jul 2007 |
| 947 | Great American Exploration, Inc. | | Oil Operator | Feb 1979 |
| 948 | Great American Resources Inc. | Bowie, TX 76230 | Oil & Gas Operator | Jul 2025 |
| 949 | Great American Royalties, Inc. | | Oil Operator | Jun 2025 |
| 950 | Great Basin Petroleum Serv, Inc. | Odessa, TX 79765 | Oil & Gas Operator | Nov 2002 |
| 951 | Great Basin Petroleum Serv, L.P. | Odessa, TX 79765 | Oil & Gas Operator | Jul 2008 |
| 952 | Great Basin Well Service Corp. | Odessa, TX 79765 | Oil & Gas Operator | Feb 2025 |
| 953 | Great Basins Petroleum Co. | | Gas Operator | Mar 2015 |
| 954 | Great Bay Operations, LLC | Portsmouth, NH 03801 | Oil & Gas Operator | Nov 2016 |
| 955 | Great Bear Pantheon, LLC | | Oil & Gas Operator | Apr 2025 |
| 956 | Great Bend Oil P | | Oil Operator | Jun 1991 |
| 957 | Great Eastern En | | Oil & Gas Operator | Nov 1995 |
| 958 | Great Eastern Energy & Dev. Corp. | Midland, TX 79701 | Oil & Gas Operator | Jul 2008 |
| 959 | Great Horned Owls, LLC | Katy, TX 77494 | Oil & Gas Operator | May 2025 |
| 960 | Great Lakes Chemical Corporation | West Lafayette, IN 47906 | Oil & Gas Operator | Nov 2023 |
| 961 | Great Lakes Conf. Of The Evangelical Covenant | Dewittville, NY 14728 | Gas Operator | Dec 2024 |
| 962 | Great Lakes Niagaran Inc | | Oil & Gas Operator | Mar 1988 |
| 963 | Great Lakes Petroleum Producers Inc | | Oil Operator | Jul 2025 |
| 964 | Great Northern Drilling Company | Billings, MT 59103 | Oil & Gas Operator | Jun 2016 |
| 965 | Great Northern Energy, Inc | Irving, TX 75039 | Oil & Gas Operator | Jul 2025 |
| 966 | Great Northern Gas Company | Denver, CO 80293-0602 | Oil & Gas Operator | Jul 2017 |
| 967 | Great Oak Energy, Inc. | Oakmont, PA 15139-2003 | Oil & Gas Operator | Feb 2021 |
| 968 | Great Plains Energy, Inc. | Lincoln, NE 68516 | Oil & Gas Operator | Apr 2025 |
| 969 | Great Plains Exploration LLC | Mentor, OH 44060 | Oil & Gas Operator | Dec 2016 |
| 970 | Great Plains Oil & Gas | Ada, OK 74820-7209 | Oil & Gas Operator | May 2013 |
| 971 | Great Plains Oper LLC Dba Great MTN Oper | Grapevine, TX 76051-5477 | Gas Operator | Nov 2015 |
| 972 | Great Plains Operating Inc | Bristow, OK 74010 | Oil & Gas Operator | Dec 1998 |
| 973 | Great Plains Operating, LLC. | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2014 |
| 974 | Great Plains Pet | | Oil & Gas Operator | Mar 1995 |
| 975 | Great Plains Petroleum, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Mar 2025 |
| 976 | Great Plains Pipeline Company | Tulsa, OK 74135-6405 | Oil & Gas Operator | Jul 2014 |
| 977 | Great Plains Resources, Inc. | Nixon, TX 78140 | Oil & Gas Operator | Jul 2025 |
| 978 | Great River Oil & Gas Corp. | | Oil & Gas Operator | Sep 1998 |
| 979 | Great Scott, Inc. | | Oil & Gas Operator | Oct 1993 |
| 980 | Great Southern - Joe Scates | | Oil Operator | Dec 1979 |
| 981 | Great Southern Oil &Gas Co Inc | | Oil & Gas Operator | Dec 2004 |
| 982 | Great Southern-Caddo-Lyons | | Oil & Gas Operator | Sep 1982 |
| 983 | Great Southwestern Expl Inc | Tulsa, OK 74105 | Oil & Gas Operator | Apr 2025 |
| 984 | Great Texas Crude Inc. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Jul 2025 |
| 985 | Great West Energy & Expl., Inc. | Addison, TX 75001 | Oil & Gas Operator | Mar 2008 |
| 986 | Great West Operating Co., Inc. | Dallas, TX 75240 | Oil & Gas Operator | Aug 2003 |
| 987 | Great Western Drilling | | Oil Operator | Dec 2002 |
| 988 | Great Western Drilling Co | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 989 | Great Western Equipment Co | Mustang, OK 73064 | Oil & Gas Operator | Apr 2025 |
| 990 | Great Western Land Co Inc | Tulsa, OK 74136-1517 | Oil & Gas Operator | Jun 2000 |
| 991 | Great Western Oil Company | | Oil & Gas Operator | Dec 1984 |
| 992 | Great Western Onshore Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 993 | Great Western Operating Company LLC | | Oil & Gas Operator | Aug 2022 |
| 994 | Great Western Resources Inc | | Oil & Gas Operator | Dec 1989 |
| 995 | Great Yellowstone Corp. | | Oil & Gas Operator | Apr 1993 |
| 996 | Greatbatch LTD. | Clarence, NY 14031 | Gas Operator | Dec 2024 |
| 997 | Grecian Gas Company | | Gas Operator | Dec 2002 |
| 998 | Greco Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 999 | Greco Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 1000 | Greehey & Company, LTD. | San Antonio, TX 78216 | Oil & Gas Operator | May 2020 |