| 101 | Geostrat Inc. | Addison, TX 75001 | Oil & Gas Operator | Nov 2011 |
| 102 | Gibson Royalty Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 1997 |
| 103 | Goldking Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 104 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 105 | Guffey, WM. R. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2015 |
| 106 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 107 | H & S Production, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Mar 2004 |
| 108 | H H Exploration, Inc. | Incline VLLG, NV 89451 | Gas Operator | Feb 2018 |
| 109 | Hadaway Consult And Engineer,LLC | Canadian, TX 79014 | Oil & Gas Operator | Sep 2026 |
| 110 | Harco Land, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Aug 1996 |
| 111 | Harper, Wayne | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 112 | Holcomb Company, The | Freer, TX 78357 | Oil & Gas Operator | Aug 1996 |
| 113 | Holmes Exploration, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jun 2015 |
| 114 | Horizon Oil & Gas Co. | Dallas, TX 75221 | Oil & Gas Operator | Jan 2005 |
| 115 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | Sep 2026 |
| 116 | Impact Exploration Company | Oklahoma City, OK 73118 | Oil & Gas Operator | May 1998 |
| 117 | Inland Ocean, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Sep 2026 |
| 118 | Interstate Explorations LLC | Houston, TX 77010 | Oil & Gas Operator | Sep 2026 |
| 119 | J.P. Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 120 | JCR, Jr - Operating, Inc. | Amarillo, TX 79114 | Oil & Gas Operator | Apr 2022 |
| 121 | JD Oil Company | Longview, TX 75605 | Oil & Gas Operator | Sep 2014 |
| 122 | Jda Energy, LLC | Pasadena, TX 77505 | Oil & Gas Operator | Sep 2026 |
| 123 | Jones Company, LTD. | Albany, TX 76430 | Oil & Gas Operator | May 1999 |
| 124 | Jones, L. E. Production Co. | Duncan, OK 73534 | Oil & Gas Operator | Jul 2014 |
| 125 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 126 | Kadane Corporation | Dallas, TX 75205 | Oil & Gas Operator | Sep 2026 |
| 127 | KCM Management, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2014 |
| 128 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Sep 2026 |
| 129 | Key Energy Of Colorado, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2016 |
| 130 | Kimbell Oil Company Of Texas | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2026 |
| 131 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 132 | Kohler Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 1994 |
| 133 | La Roca Energy, LP | Dallas, TX 75207 | Oil & Gas Operator | May 2024 |
| 134 | Lafonda Energy LLC | Vernon, TX 76384 | Oil Operator | Sep 2026 |
| 135 | Larson, Perry L Operating Co Inc | Dallas, TX 75382 | Oil & Gas Operator | Feb 2021 |
| 136 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Sep 2026 |
| 137 | Lex And Lace Petroleum, LLC | Houston, TX 77269 | Oil Operator | Sep 2026 |
| 138 | Lillis, Michael D. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 139 | Lime Rock Resources IV-A, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2026 |
| 140 | Lorac, Inc. | Dallas, TX 75252 | Oil & Gas Operator | Sep 2026 |
| 141 | Loudon Exploration, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2008 |
| 142 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 143 | Madison Oil Co.-Halbouty, M. T. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 144 | Madison Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 145 | Magnum Hunter Production, Inc. | Irving, TX 75014 | Oil & Gas Operator | Dec 2019 |
| 146 | Magnum Production & Well Service | Iowa Park, TX 76367 | Oil & Gas Operator | Sep 2026 |
| 147 | Marbil Oil, Inc. | Olney, TX 76374 | Oil & Gas Operator | Jun 2013 |
| 148 | Mariah Energy Corp. | Austin, TX 78716 | Oil & Gas Operator | Apr 1999 |
| 149 | Masada Oil & Gas | Quanah, TX 79252 | Oil & Gas Operator | Sep 2026 |
| 150 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 151 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 152 | McCown Engineering | Wichita Falls, TX 76310 | Oil & Gas Operator | Sep 2026 |
| 153 | McCracken, H. L. Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 154 | Medders Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 155 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 156 | MHM Pipeline Co., Inc. | Dallas, TX 75252 | Oil & Gas Operator | Sep 2026 |
| 157 | Miller, Bob I. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2008 |
| 158 | Mineral Development, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Aug 1996 |
| 159 | Mito Resources TX LLC | Edmond, OK 73013 | Oil & Gas Operator | Sep 2026 |
| 160 | Modern Exploration, Inc. | Sherman, TX 75090 | Oil & Gas Operator | Sep 2026 |
| 161 | Mueller Exploration, Inc. | Humble, TX 77346 | Oil & Gas Operator | Sep 2026 |
| 162 | Nordan Oil & Gas Corporation | Abilene, TX 79604 | Oil & Gas Operator | Feb 2018 |
| 163 | Ozark Exploration, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Sep 2026 |
| 164 | Panamerican Operating Inc | Dallas, TX 75219 | Oil & Gas Operator | Sep 2026 |
| 165 | Patton, E. N. Oil Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 166 | Perkins-Prothro Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2002 |
| 167 | Petech Enterprises, Inc. | Houston, TX 77066 | Oil & Gas Operator | Jan 2004 |
| 168 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2026 |
| 169 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 170 | Pony Creek Operating LLC. | Flower Mound, TX 75028 | Oil Operator | Sep 2026 |
| 171 | Price, W. H. | Granbury, TX 76048 | Oil & Gas Operator | Jun 2024 |
| 172 | Prime Western Development, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Dec 1998 |
| 173 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 174 | Producers Operating Co Inc | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2026 |
| 175 | PWR Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Sep 2026 |
| 176 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 177 | Ranger Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 178 | Ratliff Operating Corp. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2026 |
| 179 | Red River Petroleum Inc | Tipton, OK 73570 | Oil Operator | May 2026 |
| 180 | Rein Pusher Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Sep 2026 |
| 181 | Resource Operating Company | Abilene, TX 79601 | Oil & Gas Operator | Jul 1997 |
| 182 | Rio Petroleum, Inc. | Amarillo, TX 79102 | Oil & Gas Operator | Sep 2026 |
| 183 | Roberts & Hammack, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2026 |
| 184 | Rogers Drilling Co. | Olney, TX 76374 | Oil & Gas Operator | Sep 2026 |
| 185 | Roon Energy, Inc. | Boones Mill, VA 24065 | Oil Operator | Sep 2026 |
| 186 | Royalty Resources, L.L.C. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 187 | RRR Exploration, Inc. | Dallas, TX 75247 | Oil & Gas Operator | May 1994 |
| 188 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | Sep 2026 |
| 189 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |
| 190 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 191 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Sep 2026 |
| 192 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 193 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | May 2026 |
| 194 | Schalk Oil Company, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 195 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Sep 2026 |
| 196 | Sha Stephens, Incorporated | Weatherford, TX 76087 | Oil & Gas Operator | Apr 2006 |
| 197 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 198 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 199 | Skyway Energy LLC | Leesburg, OH 34748 | Oil & Gas Operator | Dec 2020 |
| 200 | Slate Holdings, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Sep 2026 |