| 12001 | Griffin Operating | | Oil & Gas Operator | Mar 1995 |
| 12002 | Griffin Operating, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2017 |
| 12003 | Griffin Petroleum Company | Midland, TX 79705 | Oil & Gas Operator | Jun 2025 |
| 12004 | Griffin Resources | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2003 |
| 12005 | Griffin Resources LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2025 |
| 12006 | Griffin Resources, Inc. | | Oil & Gas Operator | Mar 2025 |
| 12007 | Griffin Southern Corp. | | Oil & Gas Operator | Jun 1983 |
| 12008 | Griffin Well Service Inc | Konawa, OK 74849-9710 | Oil & Gas Operator | Mar 2025 |
| 12009 | Griffin, Charles | Stafford, KS 67578 | Oil Operator | Sep 1997 |
| 12010 | Griffin, Charles N. | Pratt, KS 67124 | Oil & Gas Operator | Feb 2025 |
| 12011 | Griffis, Ronnie Et Al | Stephens, AR 71764 | Oil & Gas Operator | Sep 2024 |
| 12012 | Griffith Petroleum Services Inc | Kingston, OK 73439 | Oil & Gas Operator | Mar 2025 |
| 12013 | Griffith, Johnnie R. | O'Fallon, IL 62269 | Oil & Gas Operator | Dec 1996 |
| 12014 | Griffith, Michael P. | Falconer, NY 14733 | Gas Operator | Dec 2023 |
| 12015 | Griffith, Wesley | | Oil & Gas Operator | Jun 2000 |
| 12016 | Griffiths Oil LLC | Edgerton, WY 82635 | Oil Operator | Apr 2025 |
| 12017 | Griffon & Associates, L.L.C. | Pearland, TX 77581 | Oil & Gas Operator | Jul 2008 |
| 12018 | Griffon Petroleum, Inc. | Calgary, AB T2P 3K2 | Oil & Gas Operator | May 2007 |
| 12019 | Griggs Josh | Dewey, OK 74029 | Oil Operator | Mar 2025 |
| 12020 | Griggs Oil Incor | | Oil & Gas Operator | May 1994 |
| 12021 | Griggs Oil LLC | Dewey, OK 74029-0477 | Oil & Gas Operator | Mar 2025 |
| 12022 | Griggs, VIctor C. | Austin, TX 78746 | Oil & Gas Operator | Jun 2025 |
| 12023 | Grigsby Petroleum Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 2025 |
| 12024 | Grigsby, Jack W. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2002 |
| 12025 | Grigsby-McCord Joint Account | | Oil Operator | Apr 1984 |
| 12026 | Grigsby-McCord Joint Acct Etal | | Oil Operator | Apr 1984 |
| 12027 | Grim Paul A | Logan, OH 43138-9445-9445 | Oil & Gas Operator | Dec 2020 |
| 12028 | Grimes Energy Company | Abilene, TX 79604 | Oil & Gas Operator | Mar 2005 |
| 12029 | Grimes, Norman W. | Canyon, TX 79015 | Oil & Gas Operator | Jul 2014 |
| 12030 | Grimm Assn. | | Oil & Gas Operator | Jul 2021 |
| 12031 | Grimmett Charles W | Morris, OK 74445 | Oil Operator | Mar 2025 |
| 12032 | Grimsby Exploration Inc | Canton, OH 44709 | Oil & Gas Operator | Dec 2018 |
| 12033 | Grissom, Charles A. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2001 |
| 12034 | Griswold Energy LLC | Oologah, OK 74053-6228 | Oil Operator | Mar 2025 |
| 12035 | Grit Oil & Gas Management, LLC | Houston, TX 77055 | Oil & Gas Operator | Jun 2025 |
| 12036 | Grit Oil & Gas, LLC | Houston, TX 77072 | Oil & Gas Operator | Apr 2019 |
| 12037 | Grit Operating, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2023 |
| 12038 | Grizzle, Joe B. | Paris, TX 75461 | Oil & Gas Operator | Jun 2025 |
| 12039 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 12040 | Grizzly Operating LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 12041 | GRM LLC | | Oil & Gas Operator | Jun 2021 |
| 12042 | GRMR Oil And Gas LLC | Broomfield, CO 80021 | Oil & Gas Operator | Apr 2025 |
| 12043 | Gro-Tex Exploration | Abilene, TX 79603 | Oil Operator | Jun 2025 |
| 12044 | Grogan Field Production, L.L.C. | | Oil Operator | Jan 2025 |
| 12045 | Grooms T D | Stillwater, OK 74075-3600 | Oil & Gas Operator | Oct 2001 |
| 12046 | Grose, Raymond | Buckhannon, WV 26201-0736 | Oil & Gas Operator | Dec 2003 |
| 12047 | Groshong Oil, LLC | Wellsville, KS 66092 | Oil Operator | Jan 2025 |
| 12048 | Gross Jack L Production | Borger, TX 79008-0065 | Gas Operator | Mar 2015 |
| 12049 | Gross Todd | Pine Bluffs, WY 82082 | Oil & Gas Operator | Mar 2007 |
| 12050 | Gross William R | | Oil Operator | Feb 1986 |
| 12051 | Gross, Charles E. | Dallas, TX 75220 | Oil & Gas Operator | Feb 2012 |
| 12052 | Gross, L. Jack Production | Borger, TX 79008 | Oil & Gas Operator | Dec 1994 |
| 12053 | Grothe Bros. | Albany, TX 76430 | Oil & Gas Operator | May 2011 |
| 12054 | Grothe Bros., Inc. | Slaton, TX 79364 | Oil & Gas Operator | Jun 2025 |
| 12055 | Grothe, M. L. Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Jun 2010 |
| 12056 | Grothe, M.L. Est. | Slaton, TX 79364 | Oil & Gas Operator | Jun 2025 |
| 12057 | Grothues, G B Oil | Natalia, TX 78059 | Oil Operator | Jun 2025 |
| 12058 | Ground Development Company Inc | Dallas, TX 75229-0377 | Oil & Gas Operator | Jan 2013 |
| 12059 | Ground Resources, LLC | | Oil & Gas Operator | Dec 2021 |
| 12060 | Group Maintenance Corp | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2012 |
| 12061 | Grover Collins | | Oil & Gas Operator | Dec 2002 |
| 12062 | Grover-McKinney Oil Company | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 12063 | Groves, Frank | Arkansas City, KS 67005 | Oil & Gas Operator | Mar 1995 |
| 12064 | GRR Mammoser Partnership | Eden, NY 14057 | Gas Operator | Dec 2023 |
| 12065 | GRS Oil & Gas Company | Irving, TX 75017 | Oil & Gas Operator | Aug 1994 |
| 12066 | Grubb F W "Forest" | Garber, OK 73738-0186 | Oil & Gas Operator | Jun 2005 |
| 12067 | Grubb Ronald J | Clinton, OK 73601-0906 | Oil & Gas Operator | Aug 2013 |
| 12068 | Gruenerwald WM & | | Oil & Gas Operator | Apr 1994 |
| 12069 | Gruenerwald WM & Assoc Inc | Colorado Spring, CO 80960-0669 | Oil & Gas Operator | Jan 2002 |
| 12070 | Grunder Oil, LLC | St John, KS 67576 | Oil Operator | Feb 2025 |
| 12071 | Gruss Petroleum | | Oil Operator | Jan 1986 |
| 12072 | Gruy Management Service Co. | | Oil & Gas Operator | Apr 1982 |
| 12073 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 12074 | Grynberg Petroleum Company | Greenwood Vge, CO 80111-3326 | Oil & Gas Operator | Oct 2019 |
| 12075 | Grynberg* Jack Dba Grynberg Petroleum Co | | Oil & Gas Operator | Jan 2023 |
| 12076 | Grynberg, Jack J. | Denver, CO 80237 | Oil & Gas Operator | Jun 2021 |
| 12077 | Gryphon Exploration Company | Mandeville, LA 70471 | Oil & Gas Operator | Aug 2009 |
| 12078 | GS Energy Of Texas, L.L.C. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2006 |
| 12079 | GSF Energy, L.L.C. | Pittsburgh, PA 15220 | Gas Operator | Mar 2018 |
| 12080 | Gsi Oil & Gas, Inc. | Bryan, TX 77806 | Oil & Gas Operator | Jun 2025 |
| 12081 | GT Energy | | Oil & Gas Operator | Mar 1993 |
| 12082 | GT Productions | Euless, TX 76040 | Oil & Gas Operator | Jan 1997 |
| 12083 | GTG Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | Jun 2025 |
| 12084 | Guadalupe Operating LLP | Midland, TX 79701 | Oil & Gas Operator | Oct 2013 |
| 12085 | Guadalupe Properties, LLC | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2013 |
| 12086 | Guaranty Energy Corporation | | Oil & Gas Operator | Aug 1990 |
| 12087 | Guardian Energy Consultants, Inc. | Tulsa, OK 74120 | Gas Operator | Sep 2009 |
| 12088 | Guardian Exploration LLC | Hunt, TX 78024-0225 | Oil & Gas Operator | Dec 2011 |
| 12089 | Guardian Management Inc | Marion, OH 43302 | Oil & Gas Operator | Dec 1997 |
| 12090 | Guardian Oil Company | | Oil & Gas Operator | Aug 1985 |
| 12091 | Guardian Operating Corp. | Midland, TX 79707 | Oil & Gas Operator | Nov 2016 |
| 12092 | Guenthart William & Lavonne | Newcastle, WY 82701 | Oil Operator | Apr 2025 |
| 12093 | Guernsey Petroleum Corp Of MS | | Oil Operator | Jul 1988 |
| 12094 | Guernsey Petroleum Corporation | Atlanta, GA 30318 | Oil & Gas Operator | Nov 1997 |
| 12095 | Guernsey/Rosbottom | | Oil Operator | Apr 1989 |
| 12096 | Guest Petroleum Incorporated | Edmond, OK 73013 | Oil & Gas Operator | Mar 2025 |
| 12097 | Guest R E Oil Producer | Edmond, OK 73083-0805 | Oil & Gas Operator | Mar 2015 |
| 12098 | Guffey & Galey | | Oil & Gas Operator | Aug 1981 |
| 12099 | Guffey, Roy, Oil Company | Dallas, TX 75206 | Oil & Gas Operator | Aug 2011 |
| 12100 | Guffey, WM. R. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2015 |