| 101 | J & M SWD, LLC | Stamford, TX 79553 | Oil Operator | May 2025 |
| 102 | James Operating | Iowa Park, TX 76367 | Oil & Gas Operator | May 2025 |
| 103 | Journey Operating, L.L.C. | Sugar Land, TX 77496 | Oil & Gas Operator | Aug 2006 |
| 104 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2025 |
| 105 | KCM Management, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2014 |
| 106 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 107 | Kimball Production Co. | Houston, TX 77042 | Oil & Gas Operator | Jul 2002 |
| 108 | Kinder Morgan Production Co LLC | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 109 | Kinder Morgan Production Co LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2007 |
| 110 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | May 2025 |
| 111 | Laloc | Aspermont, TX 79502 | Oil & Gas Operator | May 2025 |
| 112 | Lawlis Oil Company | Hamlin, TX 79520 | Oil & Gas Operator | May 2025 |
| 113 | Leclair Operating Co., Inc. | Abilene, TX 79602 | Oil & Gas Operator | May 2025 |
| 114 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | May 2025 |
| 115 | Lomax Operating Company, Inc. | Abilene, TX 79602 | Oil & Gas Operator | Jun 2011 |
| 116 | Lytle Creek Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | May 2025 |
| 117 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | May 2025 |
| 118 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Mar 2025 |
| 119 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 120 | McClure Oil Company, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 121 | McClymond, LTD. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2009 |
| 122 | McMahon-Bullington Drilling Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 1996 |
| 123 | Medders Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 124 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 125 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 126 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 127 | Midpar L.P. | Midland, TX 79702 | Oil & Gas Operator | Feb 1995 |
| 128 | Miller, W. C. Operating Company | San Antonio, TX 78209 | Oil & Gas Operator | May 2025 |
| 129 | Miocene Oil & Gas, LTD. | Englewood, CO 80110 | Oil & Gas Operator | May 2025 |
| 130 | MLC Operating, LP | Houston, TX 77063 | Oil & Gas Operator | May 2025 |
| 131 | Montgomery Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2007 |
| 132 | MWL Energy LLC | Hamlin, TX 79520 | Oil Operator | May 2025 |
| 133 | New Height Energy, LLC | Houston, TX 77063 | Oil & Gas Operator | May 2025 |
| 134 | Newton Corp.,The | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 135 | North American Exploration Co. | Abilene, TX 79602 | Oil & Gas Operator | Apr 1998 |
| 136 | Nosivad Oil, Inc. | Clyde, TX 79510 | Oil & Gas Operator | May 2025 |
| 137 | Oasis Operating, Inc. | Lubbock, TX 79404 | Oil & Gas Operator | Nov 2020 |
| 138 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 139 | Osr Oil & Gas Company | Victoria, TX 77902 | Oil & Gas Operator | Jul 2000 |
| 140 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 141 | P.B. Blue Dot Properties | Wexford, PA 15090 | Oil & Gas Operator | May 2025 |
| 142 | Paragon Oil & Gas, LLC | Aledo, TX 76008 | Oil & Gas Operator | May 2025 |
| 143 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 144 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 145 | Patton Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 146 | Patton, E. N. Oil Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 147 | Petrotex, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 148 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 149 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 150 | Phoenix Petrocorp, Inc. | McKinney, TX 75070 | Oil & Gas Operator | Mar 2025 |
| 151 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | May 2025 |
| 152 | Plumb Resources, Inc. | Houston, TX 77096 | Oil & Gas Operator | Jun 1998 |
| 153 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 154 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 155 | Polk Petroleum, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2024 |
| 156 | PPC Operating Company LLC | Houston, TX 77279 | Oil & Gas Operator | Jul 2019 |
| 157 | Primrose Operating Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2007 |
| 158 | Raw Oil & Gas, Inc. | Lubbock, TX 79401 | Oil & Gas Operator | May 2025 |
| 159 | Ridglea Energy I, LLC | Spring, TX 77379 | Oil & Gas Operator | May 2025 |
| 160 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 161 | RLS Oil Company | Tulia, TX 79088 | Oil & Gas Operator | May 2025 |
| 162 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 163 | Ross, Dwight M. DRLG. Co., Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | May 2025 |
| 164 | Rutherford, Michael A. | Dallas, TX 75381 | Oil & Gas Operator | May 2000 |
| 165 | S N D Energy Company, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | May 2025 |
| 166 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | May 2025 |
| 167 | Salida Exploration, LLC | Abilene, TX 79603 | Oil & Gas Operator | May 2025 |
| 168 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 169 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 170 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 171 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 172 | Sauder Management Company | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2025 |
| 173 | Schalk Oil Company, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2025 |
| 174 | Schkade Bros. Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Oct 2021 |
| 175 | Seelye, William L. | Plano, TX 75024 | Oil & Gas Operator | Oct 2005 |
| 176 | Shelby Production, Inc. | Kilgore, TX 75663 | Gas Operator | May 2025 |
| 177 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 178 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 179 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Feb 2025 |
| 180 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | May 2025 |
| 181 | Sojourner Drilling Corporation | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 182 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 183 | SRG Oil Corporation | Abilene, TX 79604 | Oil & Gas Operator | Apr 1994 |
| 184 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | May 2025 |
| 185 | Staley, Jack C. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 186 | Star Production, Inc. | Dallas, TX 75360 | Oil & Gas Operator | May 2025 |
| 187 | Stelzer, J. C. | Post, TX 79356 | Oil & Gas Operator | Dec 1995 |
| 188 | Stephens, Clayton E. | Dallas, TX 75229 | Oil & Gas Operator | Nov 2011 |
| 189 | Strange, D. D. | Archer City, TX 76351 | Oil & Gas Operator | Sep 2014 |
| 190 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 191 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 192 | Sunlight Exploration, Inc. | Canyon, TX 79015 | Oil & Gas Operator | May 2025 |
| 193 | Taubert & Steed | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 2001 |
| 194 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | May 2025 |
| 195 | Tempo Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 196 | Texas Energy Sources, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2008 |
| 197 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 198 | Titan Resources I, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jun 2000 |
| 199 | TKP Petroleum, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | May 2025 |
| 200 | Townsend Company | Abilene, TX 79608 | Oil & Gas Operator | Dec 2021 |