| 4001 | Forge Energy, LLC | San Antonio, TX 78249 | Oil & Gas Operator | Apr 2019 |
| 4002 | Formation Recovery LLC | Weatherford, TX 76087 | Oil & Gas Operator | Dec 2025 |
| 4003 | Formation Resources LLC | Fort Worth, TX 76185 | Oil & Gas Operator | Dec 2025 |
| 4004 | Formentera Operations LLC | Austin, TX 78701 | Oil & Gas Operator | Dec 2025 |
| 4005 | Forney & McCombs | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 4006 | Forney Oil Corporation | Houston, TX 77056 | Oil & Gas Operator | Jan 1998 |
| 4007 | Forrest Energy, LLC | Hattiesburg, MS 39401 | Oil & Gas Operator | Feb 1998 |
| 4008 | Forrester Oil & Gas Co. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 4009 | Forrester, J. L. | Longview, TX 75606 | Oil & Gas Operator | Dec 2025 |
| 4010 | Forsan Oil Company | Forsan, TX 79733 | Oil & Gas Operator | Jul 2008 |
| 4011 | Forster, Fred Jr. | Midland, TX 79705 | Oil & Gas Operator | Aug 2008 |
| 4012 | Fort Apache Energy, Inc. | Boerne, TX 78015 | Oil & Gas Operator | Dec 2025 |
| 4013 | Fort Worth Natural Gas, Inc. | Dallas, TX 75254 | Oil & Gas Operator | Dec 2025 |
| 4014 | Fort Worth Production Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Oct 1996 |
| 4015 | Fortay Inc. | Sunray, TX 79086 | Oil & Gas Operator | Dec 2025 |
| 4016 | Forte Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Dec 2010 |
| 4017 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 4018 | Fortuna Exploration, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Dec 2025 |
| 4019 | Fortuna Resources Dvlpment, LLC | Houston, TX 77055 | Oil & Gas Operator | Dec 2025 |
| 4020 | Fortune Energy, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2025 |
| 4021 | Fortune Natural Resources Corp. | Houston, TX 77067 | Oil & Gas Operator | Dec 2003 |
| 4022 | Fortune Operating Company | Willis, TX 77378 | Oil & Gas Operator | Dec 2025 |
| 4023 | Fortune Operating, Inc. | Bowling Green, KY 42104 | Oil & Gas Operator | Dec 2025 |
| 4024 | Fortune Production Co. | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2008 |
| 4025 | Fortune Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Dec 2025 |
| 4026 | Forum Exploration Co., L.P. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2010 |
| 4027 | Forza Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2025 |
| 4028 | Fossil Creek Energy Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2025 |
| 4029 | Fossil Energy Inc | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 4030 | Fossil Fuels Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2000 |
| 4031 | Fossil Operating, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Dec 2025 |
| 4032 | Fossil Petroleum LLC | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2025 |
| 4033 | Fossil Resources, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Oct 2017 |
| 4034 | Fossil Rock Resources, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | May 2016 |
| 4035 | Foster Energy Company | Tilden, TX 78072 | Oil & Gas Operator | Sep 2024 |
| 4036 | Foster Well Service, Inc. | Conroe, TX 77305 | Oil & Gas Operator | Jan 2000 |
| 4037 | Foster, Charles R. Co. | Haskell, TX 79521 | Oil & Gas Operator | Aug 2002 |
| 4038 | Foster, Randy | New Braunfels, TX 78132 | Oil & Gas Operator | Feb 2021 |
| 4039 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Dec 2025 |
| 4040 | Foundation Oil Company, Inc. | Kingwood, TX 77325 | Oil & Gas Operator | Dec 2025 |
| 4041 | Founders Oil & Gas Operating,LLC | Arlington, TX 76011 | Oil & Gas Operator | Jul 2023 |
| 4042 | Four - S Oil Company, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2008 |
| 4043 | Four Aces Company | Borger, TX 79008 | Oil & Gas Operator | Mar 1995 |
| 4044 | Four C Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 4045 | Four Corners Energy, LLC | Gulf Breeze, FL 32563 | Oil & Gas Operator | Dec 2025 |
| 4046 | Four Corners Petroleum II, LLC | Denver, CO 80215 | Oil & Gas Operator | Feb 2023 |
| 4047 | Four Diamond Operating, LLC | Kilgore, TX 75662 | Oil Operator | Dec 2025 |
| 4048 | Four Forty One Oil Co. | Natalia, TX 78059 | Oil & Gas Operator | Dec 2025 |
| 4049 | Four H Oil Properties | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 4050 | Four K Production | Pampa, TX 79065 | Oil & Gas Operator | Dec 2025 |
| 4051 | Four Kin Oil Co | Muenster, TX 76252 | Oil & Gas Operator | Dec 2001 |
| 4052 | Four Seas Exploration LLC | Oklahoma City, OK 73101-1557 | Oil & Gas Operator | Dec 2019 |
| 4053 | Four Sevens Oil Co., LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2001 |
| 4054 | Four Sevens Operating Co., LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 4055 | Four Square Production, L.L.C. | Houston, TX 77079 | Oil & Gas Operator | Aug 2004 |
| 4056 | Four Star Oil & Gas Company | Houston, TX 77252 | Oil & Gas Operator | Sep 2025 |
| 4057 | Four Starr Energy, Inc. | Dallas, TX 75243 | Gas Operator | May 2016 |
| 4058 | Four Starr Production, LLC | Dallas, TX 75243 | Oil & Gas Operator | Dec 2025 |
| 4059 | Four-C Management & Industries | Rockdale, TX 76567 | Oil & Gas Operator | Aug 2008 |
| 4060 | Four-S Oil Co., LTD. | Kilgore, TX 75663 | Oil Operator | Apr 2007 |
| 4061 | Fourcooks Oil & Gas, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 4062 | Fourpoint Energy, LLC | Denver, CO 80206 | Oil & Gas Operator | Dec 2025 |
| 4063 | Fourstar Resources LLC | Westlake, TX 76262 | Oil Operator | Oct 2025 |
| 4064 | Fourth Floor Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 4065 | Fourway Oil Company | Longview, TX 75606 | Oil & Gas Operator | Dec 2025 |
| 4066 | Fowler Oil & Gas LLC | Fort Worth, TX 76109 | Oil & Gas Operator | Dec 2025 |
| 4067 | Fox Oil And Gas Inc | Houston, TX 77002 | Gas Operator | Dec 2002 |
| 4068 | Fox Oil, Inc. | Iowa Park, TX 76367 | Oil & Gas Operator | Feb 1999 |
| 4069 | Fox Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 4070 | Fox, Hewitt B., Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Dec 2025 |
| 4071 | Foxborough Energy Company, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2025 |
| 4072 | Foxfire Productions, Inc. | Corsicana, TX 75110 | Oil Operator | Jul 2014 |
| 4073 | FP Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Dec 2008 |
| 4074 | Fraco Services, Inc. | Burkburnett, TX 76354 | Oil Operator | Dec 2025 |
| 4075 | Fran Investments, Inc. | Laredo, TX 78043 | Oil & Gas Operator | Dec 2025 |
| 4076 | Frances Oil Co. | Corsicana, TX 75110 | Oil & Gas Operator | Dec 2025 |
| 4077 | Francisco Creek Operating, Inc. | Castroville, TX 78009 | Oil Operator | Dec 2025 |
| 4078 | Frank Louis L | Kingsville, TX 78364 | Oil & Gas Operator | Aug 2003 |
| 4079 | Franklin, J.W. Oil Operator | | Oil & Gas Operator | Nov 2001 |
| 4080 | Franklin, Jack | Arlington, TX 76013 | Oil & Gas Operator | Nov 2007 |
| 4081 | Frantz Resource Management, LLC | Hartley, TX 79044 | Oil Operator | Dec 2025 |
| 4082 | Fratelli Exploration, L.P. | Bedford, TX 76095 | Oil Operator | Dec 2025 |
| 4083 | Frazier Exploration Partners,LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 4084 | Frazier Resources Company | Houston, TX 77057 | Gas Operator | May 2004 |
| 4085 | Frazier, VIolet H. | Abilene, TX 79604 | Oil & Gas Operator | Apr 2014 |
| 4086 | Fred Underwood, LLC | Dallas, TX 75230 | Oil & Gas Operator | Dec 2025 |
| 4087 | Fredco | Louise, TX 77455 | Oil & Gas Operator | Dec 2025 |
| 4088 | Freddy'S Well Service, Inc. | Victoria, TX 77902 | Oil & Gas Operator | May 2025 |
| 4089 | Fredna Oil Co. | Aledo, TX 76008 | Oil & Gas Operator | Sep 2020 |
| 4090 | Fredonia Resources Inc. | Longview, TX 75606 | Oil & Gas Operator | Aug 2003 |
| 4091 | Free Rein Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Dec 2025 |
| 4092 | Freedom Energy Inc | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Dec 2025 |
| 4093 | Freedom Energy, Inc. (I) | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Jun 2003 |
| 4094 | Freedom Energy, LTD. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Jun 2011 |
| 4095 | Freeman Energy Inc. (I) | Fredericksbrg, TX 78624 | Oil & Gas Operator | Aug 1996 |
| 4096 | Freeman Expl. & Prod. Co., Inc. | Houston, TX 77279 | Oil & Gas Operator | Aug 2020 |
| 4097 | Freeman Oil Co | Midland, TX 79701 | Oil & Gas Operator | Sep 2014 |
| 4098 | Freeman, James C. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 2000 |
| 4099 | Freeman, Kathleen Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 1996 |
| 4100 | Freeman, Michael | Abilene, TX 79601 | Oil & Gas Operator | Dec 2025 |