| 101 | Devon Energy Production Company, L.P. | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2026 |
| 102 | Dixon Exploration Inc | Abilene, TX 79604 | Oil & Gas Operator | Oct 2019 |
| 103 | DJ & T Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | Sep 2026 |
| 104 | Domino Operations, Inc. | Abilene, TX 79603 | Oil & Gas Operator | Sep 2026 |
| 105 | Double M Petroproperties, Inc. | Haskell, TX 79521 | Oil & Gas Operator | Sep 2026 |
| 106 | Dunigan Petroleum, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 107 | Dym Energy, Inc. | Celina, TX 75009 | Oil & Gas Operator | Apr 2018 |
| 108 | Echo Production Inc | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 109 | Edington Oil Company | Albany, TX 76430 | Oil & Gas Operator | Aug 2006 |
| 110 | Encore Energy, Inc. | Gainesville, TX 76241 | Oil & Gas Operator | Mar 2015 |
| 111 | Energy Transfer Crude Marketing LLC | Dallas, TX 75225 | Oil Operator | Apr 2026 |
| 112 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 113 | Enexco, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Mar 2017 |
| 114 | Enrich Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 115 | Enserch Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Apr 2015 |
| 116 | Eratz Investments Inc. | Dallas, TX 75240 | Oil & Gas Operator | Sep 2026 |
| 117 | Erwin, James D. | Dallas, TX 75225 | Oil & Gas Operator | Nov 1993 |
| 118 | Et Gathering & Processing LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 119 | Etc Texas Pipeline, LTD. | Dallas, TX 75225 | Oil Operator | Sep 2023 |
| 120 | Excel Energy, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Sep 2026 |
| 121 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | May 2026 |
| 122 | Exmoor Oil & Minerals Corp. | Dallas, TX 75225 | Oil & Gas Operator | May 1994 |
| 123 | Extech Operating, LLC | Fort Worth, TX 76147 | Oil & Gas Operator | Sep 2026 |
| 124 | Exxon Corporation | Houston, TX 77210 | Oil & Gas Operator | Jan 2026 |
| 125 | Fagadau Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Apr 2006 |
| 126 | Falcon Creek Resources, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2001 |
| 127 | Farmer Operating, LLC | Olney, TX 76374 | Oil & Gas Operator | Dec 2019 |
| 128 | Farmer, Hayden | Olney, TX 76374 | Oil & Gas Operator | Feb 1997 |
| 129 | Farmer, Lewis & Hayden | Olney, TX 76374 | Oil & Gas Operator | Oct 2008 |
| 130 | Federal Oil, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Sep 2026 |
| 131 | Fenn, Bill Inc. | Giddings, TX 78942 | Oil & Gas Operator | Mar 2008 |
| 132 | Fiscus Drilling Co., Inc. | Clyde, TX 79510 | Oil & Gas Operator | Apr 2015 |
| 133 | Fisher, Jack Inc. | Abilene, TX 79603 | Oil & Gas Operator | Sep 2001 |
| 134 | Flat Top Operating, LLC | Midland, TX 79707 | Oil & Gas Operator | Sep 2026 |
| 135 | Flow Production Company | Midland, TX 79708 | Oil & Gas Operator | Mar 2005 |
| 136 | Foree Oil Company | Terrell, TX 75160 | Oil & Gas Operator | Sep 2026 |
| 137 | Foree, R. L. Trust "A" | Dallas, TX 75225 | Oil & Gas Operator | Dec 1999 |
| 138 | Fortson Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2020 |
| 139 | Foster, Charles R. Co. | Haskell, TX 79521 | Oil & Gas Operator | Aug 2002 |
| 140 | Foundation Energy Management, LLC | Addison, TX 75001 | Oil & Gas Operator | Sep 2026 |
| 141 | Four C Oil & Gas Corp. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2024 |
| 142 | Frontier Operating Corporation | Albany, TX 76430 | Oil & Gas Operator | Sep 2026 |
| 143 | FTC Consulting, LLC | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 144 | G & F Oil, Inc. | Aledo, TX 76008 | Oil & Gas Operator | Sep 2026 |
| 145 | G E Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2020 |
| 146 | GBG Operating Corp. | Wichita Falls, TX 76302 | Oil & Gas Operator | Sep 1998 |
| 147 | Georgetown Operating Company | Oklahoma City, OK 73113 | Oil & Gas Operator | Jun 2019 |
| 148 | Geosurveys, Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 2026 |
| 149 | Giant Energy Corp. | Dallas, TX 75230 | Oil & Gas Operator | Jul 2019 |
| 150 | Ginnings Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 151 | Glahn Resources, Inc. | Arlington, TX 76003 | Oil & Gas Operator | Sep 2026 |
| 152 | Glen D. Gonzenbach, LLC | Henrietta, TX 76365 | Oil & Gas Operator | Dec 2016 |
| 153 | Glenn, Wayne E. & Assoc., Inc. | Dickinson, TX 77539 | Oil & Gas Operator | Jun 2005 |
| 154 | GM Petroleum Corporation (I) | Dallas, TX 75218 | Oil & Gas Operator | Aug 2003 |
| 155 | Go Oil Corp. | Jacksboro, TX 76458 | Oil & Gas Operator | Sep 2026 |
| 156 | Golden Horse Group Corp. | Richmond, TX 77407 | Oil Operator | Sep 2026 |
| 157 | Golden Resources Corporation | Dallas, TX 75238 | Oil & Gas Operator | Dec 1998 |
| 158 | Goopco, Inc. | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 159 | Grace 7 Properties, LTD. | Argyle, TX 76226 | Oil & Gas Operator | Sep 2026 |
| 160 | Grand Banks Energy Company | Fort Worth, TX 76102 | Oil & Gas Operator | May 2026 |
| 161 | Greasewood Oil Company | Midland, TX 79705 | Oil & Gas Operator | Jul 2007 |
| 162 | Greco Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 163 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 164 | Guinn Investments, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2018 |
| 165 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 166 | H & R Well Services, Inc. | FT Morgan, CO 80701 | Oil & Gas Operator | Apr 2015 |
| 167 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 168 | H-M Resource Management, Inc. | Houston, TX 77055 | Oil & Gas Operator | Feb 2023 |
| 169 | Hale, Mike E. | Georgetown, TX 78628 | Oil & Gas Operator | Dec 2003 |
| 170 | Halvey Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 171 | Hamman, Blake | Graham, TX 76450 | Oil & Gas Operator | Jul 2020 |
| 172 | Harding Company | Dallas, TX 75244 | Oil & Gas Operator | Jan 2015 |
| 173 | Harken Exploration Company | Houston, TX 77079 | Oil & Gas Operator | Mar 2008 |
| 174 | Harvick, George R. | Albany, TX 76430 | Oil & Gas Operator | Sep 2026 |
| 175 | Hastings, J. W. Oil Co. | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2010 |
| 176 | Hawthorne Oil And Gas Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1993 |
| 177 | Hce Operating LLC | Smyer, TX 79367 | Oil & Gas Operator | Sep 2026 |
| 178 | Headline Resources, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Aug 1997 |
| 179 | Heart Land Petroleum Corporation | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 180 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 181 | Herring, Ray | Graham, TX 76450 | Oil & Gas Operator | Jul 2014 |
| 182 | Hess, Jerry Operating Co. | Muenster, TX 76252 | Oil & Gas Operator | Sep 2026 |
| 183 | Hewitt, Alan P. | Midland, TX 79702 | Oil & Gas Operator | Aug 1997 |
| 184 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Sep 2026 |
| 185 | Heydrick Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 186 | Hill Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2009 |
| 187 | Hoco Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 188 | Hofco, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 189 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 190 | Howle Operating Account, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 1999 |
| 191 | HRH Energy Group Incorporated | Carrollton, TX 75006 | Oil & Gas Operator | Nov 2009 |
| 192 | Huntwood Resources, LLC | Huntsville, TX 77340 | Oil Operator | Sep 2026 |
| 193 | HW Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 194 | Ics Energy LLC | Stamford, TX 79553 | Oil & Gas Operator | Mar 2026 |
| 195 | Iron Bell Operating, LLC | Lubbock, TX 79423 | Oil & Gas Operator | Sep 2026 |
| 196 | Iron Horse Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Sep 2026 |
| 197 | J & M SWD, LLC | Stamford, TX 79553 | Oil Operator | Sep 2026 |
| 198 | J-E Production, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2008 |
| 199 | Jacobs, C. E., Co. | Albany, TX 76430 | Oil & Gas Operator | Sep 2022 |
| 200 | JMM Energy LLC | Brownsville, TX 78521 | Oil & Gas Operator | Sep 2026 |