| 1 | E & B Equipment | Liberty, TX 77575 | Oil & Gas Operator | Feb 2010 |
| 2 | E & E Production Company, Inc. | | Oil & Gas Operator | Dec 2004 |
| 3 | E D Markham | | Gas Operator | Nov 1978 |
| 4 | E Lee Mills | | Oil Operator | Aug 1987 |
| 5 | E Texas Production MGMT Co Inc | | Oil & Gas Operator | Oct 1996 |
| 6 | E-Z Mart Stores, Inc. | | Oil Operator | Jul 2004 |
| 7 | E. & H. Oil Company | Woodson, TX 76491 | Oil & Gas Operator | May 1998 |
| 8 | E. & S. Drilling Company | | Oil & Gas Operator | Feb 1995 |
| 9 | E. A. Courtney | | Oil & Gas Operator | Oct 1978 |
| 10 | E. Conway Butts, Inc. | | Oil & Gas Operator | Apr 1991 |
| 11 | E. G. Williamson, Jr. | | Oil Operator | Jan 1993 |
| 12 | E. L. Cox And Stanrich Oil Co. | | Oil & Gas Operator | Jul 1981 |
| 13 | E. L. Larry | | Oil & Gas Operator | Mar 1989 |
| 14 | E. M. Self | | Oil Operator | Feb 1981 |
| 15 | E. P. Alexander | | Oil Operator | Jan 1984 |
| 16 | E. P. Alexander, Et Al | | Oil Operator | Jan 1984 |
| 17 | E2 Operating LLC | Tulsa, OK 74135 | Oil & Gas Operator | Feb 2026 |
| 18 | Eads Operating Company | | Oil & Gas Operator | Mar 1991 |
| 19 | Eagle Energy Development Co | La Porte, TX 77571 | Oil & Gas Operator | Dec 2024 |
| 20 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 21 | Eagle Oil & Gas, Inc. | | Oil & Gas Operator | Nov 1984 |
| 22 | Eagle Oil Management Co., LLC | | Oil & Gas Operator | Jan 2023 |
| 23 | Earl Dyess | | Oil & Gas Operator | Jul 1990 |
| 24 | Earl Markham Et Al | | Gas Operator | Jun 1979 |
| 25 | Earl W Todd | | Oil Operator | Jan 2008 |
| 26 | Easom-Middleton Operating, Inc | | Oil & Gas Operator | Sep 1992 |
| 27 | Eason Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2012 |
| 28 | Eason Petroleum Company | | Oil & Gas Operator | Jul 2016 |
| 29 | East Ajax Oil Corporation | | Oil & Gas Operator | May 2000 |
| 30 | East Texas Exploration, LLC | Edmond, OK 73003 | Oil & Gas Operator | Sep 2019 |
| 31 | Eastern Oil Corporation | Houston, TX 77070 | Oil & Gas Operator | Feb 2026 |
| 32 | Eclipse Petroleum Corporation | La Grange, TX 78945 | Oil & Gas Operator | Aug 2003 |
| 33 | Eclipse Services, Inc. * | La Grange, TX 78945 | Oil & Gas Operator | Jul 2003 |
| 34 | Ed I. Estis | | Oil & Gas Operator | Sep 1998 |
| 35 | Ed Shea | | Oil Operator | Sep 1990 |
| 36 | Eddie Mayo | | Oil Operator | Jun 2006 |
| 37 | Eddy Enterprises, Inc. | | Oil & Gas Operator | Sep 2023 |
| 38 | Edge Petroleum Oper. Co., Inc. | Houston, TX 77042 | Oil & Gas Operator | Nov 2010 |
| 39 | Edgewater Oil Co. Inc. | | Oil & Gas Operator | Jul 1995 |
| 40 | Edgewood Exploration Inc. | | Oil & Gas Operator | Mar 1993 |
| 41 | Edisto Resources Corporation | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 42 | Edward I. Estis, SR. | | Oil & Gas Operator | Aug 1991 |
| 43 | Edward Oil Company | Youngsville, PA 16371 | Oil & Gas Operator | Nov 2024 |
| 44 | Edwards & Leach Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2005 |
| 45 | Edwin L Cox & Berry R Cox-Eni | | Oil & Gas Operator | May 1986 |
| 46 | Edwin L Cox-Michael Halbouty | | Oil & Gas Operator | Jun 1986 |
| 47 | Edwin L. Cox | | Oil & Gas Operator | May 1986 |
| 48 | Edwin L. Cox & Berry R. Cox | | Oil & Gas Operator | Jun 1986 |
| 49 | Edwin S. Malmed | | Gas Operator | Dec 2002 |
| 50 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 51 | Eex E&P Company, L.P. | Houston, TX 77060 | Oil & Gas Operator | Jul 2003 |
| 52 | Egh Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 53 | Eidos Energy, Inc. | | Oil & Gas Operator | Oct 2017 |
| 54 | Ekberg-Sinclair & Associates | | Oil & Gas Operator | Jan 1991 |
| 55 | El Paso E&P Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Mar 2013 |
| 56 | El Paso Exploration Company | | Oil & Gas Operator | Jul 1985 |
| 57 | El Paso Field Services Company | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 58 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 59 | El Paso Production Gom, Inc. | | Oil & Gas Operator | Nov 2005 |
| 60 | El Toro Production Co Inc | | Oil & Gas Operator | Jan 2016 |
| 61 | El Tres Petr. Corp. | | Oil & Gas Operator | Jan 1984 |
| 62 | El-Oil, LTD. | | Oil & Gas Operator | Nov 2024 |
| 63 | Elad Petroleum Corporation | | Oil Operator | Jun 2005 |
| 64 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Dec 2025 |
| 65 | Eldon Radke | | Oil Operator | May 2001 |
| 66 | Eldorado Gas Inc. | | Oil & Gas Operator | May 1986 |
| 67 | Eleuterius Company | | Oil Operator | Jan 1983 |
| 68 | Elf Aquitaine Inc | Houston, TX 77002 | Oil & Gas Operator | May 1991 |
| 69 | Elf Aquitaine Operating, Inc. | | Oil & Gas Operator | Jan 1992 |
| 70 | Elfco, Inc. | College Sta, TX 77845 | Oil & Gas Operator | Jun 1996 |
| 71 | Elgie Company, Inc. | | Oil & Gas Operator | Aug 1993 |
| 72 | Elgin Energy Corp. | | Oil Operator | May 1995 |
| 73 | Eli Rebich | | Oil & Gas Operator | Dec 1986 |
| 74 | Elizabeth Oil Company | | Oil Operator | Oct 1999 |
| 75 | Elliott Oil & Gas Company | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2006 |
| 76 | Ellis M. Moore, Et Al | | Oil Operator | Mar 1986 |
| 77 | Ellora Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 78 | Ellora Operating, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2011 |
| 79 | Elmwood Operating LLC | | Oil & Gas Operator | Jun 2024 |
| 80 | Elsbury & Acker | | Oil & Gas Operator | Feb 2003 |
| 81 | Elsbury & McGrew | | Oil & Gas Operator | Nov 1986 |
| 82 | Elysium Energy, L.L.C | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 83 | Elysium Jennings, LLC | | Oil & Gas Operator | Dec 2024 |
| 84 | Emerald Oil Co. | | Oil & Gas Operator | Apr 1980 |
| 85 | Emerald Oil Company, L.L.C. | E. Rochester, NY 14445 | Oil & Gas Operator | Jan 2025 |
| 86 | Emerge Operating, LLC | | Oil & Gas Operator | Nov 2025 |
| 87 | Empire Land Corporation | New Orleans, LA 70130 | Oil & Gas Operator | Nov 2014 |
| 88 | Empire Louisiana LLC Of Delaware | | Oil & Gas Operator | Dec 2024 |
| 89 | Empresa Energy IV, LLC | | Oil & Gas Operator | Aug 2019 |
| 90 | Empresa Energy, LP | Houston, TX 77024 | Oil & Gas Operator | Jul 2009 |
| 91 | Empresa Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 92 | Enable Midstream Partners, LP | Oklahoma City, OK 73124 | Oil Operator | Sep 2023 |
| 93 | Enbridge Offshore Pipelines(Seacrest) LP | | Oil Operator | Oct 2009 |
| 94 | Enbridge P/LS (La Intra.)L.L.C. | | Oil Operator | Oct 2009 |
| 95 | Encana Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Oct 2020 |
| 96 | Enco Resources Inc. | Kingwood, TX 77325 | Oil & Gas Operator | Feb 2026 |
| 97 | Encore Operating Louisiana, LLC | | Oil & Gas Operator | Dec 2010 |
| 98 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Nov 2025 |
| 99 | Endeavor Natural Gas, LP | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 100 | Endurance Oil & Gas, Inc. | Minden, LA 71055 | Oil & Gas Operator | Feb 2026 |