| 101 | NGC Energy Co. | | Oil & Gas Operator | May 1989 |
| 102 | Ocean Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 103 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 104 | Ozark Production Company, Inc. | | Oil & Gas Operator | Jan 2024 |
| 105 | P & P Producing Inc | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 106 | Pan-Ok Production Company | | Oil & Gas Operator | Dec 2023 |
| 107 | Panenergy La Intrastate Co | | Oil Operator | Mar 2000 |
| 108 | Parker & Parsley Devpt L P | | Oil & Gas Operator | Oct 1997 |
| 109 | Pelico Pipeline, LLC | | Oil Operator | Dec 2023 |
| 110 | Peoples Energy Prod.-TX, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2007 |
| 111 | Petro-Chem Operating Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2024 |
| 112 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 113 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 114 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 115 | Placid Oil Company | Houston, TX 77227 | Oil & Gas Operator | Mar 2008 |
| 116 | Premier Natural Resources II,LLC | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2015 |
| 117 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 118 | Range Louisiana Operating, LLC | | Oil & Gas Operator | Aug 2020 |
| 119 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 120 | Ranger Investments, Inc. | Longview, TX 75605 | Oil & Gas Operator | Nov 2006 |
| 121 | Rio Bravo Expl. & Prod. Co. | Houston, TX 77055 | Oil & Gas Operator | Apr 2020 |
| 122 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 123 | Rosewood Resources (HPC), Inc. | | Gas Operator | Dec 1984 |
| 124 | Rosewood Resources (Poc), Inc. | | Oil & Gas Operator | Dec 1984 |
| 125 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 126 | Samson Contour Energy E&P, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2017 |
| 127 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 128 | Sandel Energy, Inc. | Huntsville, TX 77342 | Oil & Gas Operator | Apr 2004 |
| 129 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 130 | Seagull Mid-South Inc | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 131 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Apr 2024 |
| 132 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 133 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Apr 2024 |
| 134 | Suburban Propane Expl Co, Inc. | | Oil & Gas Operator | Jun 1983 |
| 135 | Suburban Propane Gas Corp. | | Oil & Gas Operator | Sep 1980 |
| 136 | Sun Exploration-Production Co. | | Oil & Gas Operator | Jan 1990 |
| 137 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 138 | T. L. James & Co., Inc. | | Oil & Gas Operator | Oct 1992 |
| 139 | Tellus Operating Group, LLC | | Oil & Gas Operator | Jan 2024 |
| 140 | Tenison Oil Company | Abilene, TX 79605 | Oil & Gas Operator | Apr 2024 |
| 141 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 142 | Texas Oil & Gas Corporation | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 143 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 144 | TGNR TVL LLC | | Oil & Gas Operator | Dec 2023 |
| 145 | Tierra Petroleum Corp. | | Oil & Gas Operator | Jun 1987 |
| 146 | Tipco | Shreveport, LA 71104-3047 | Oil & Gas Operator | May 1988 |
| 147 | Trans Ocean Oil, Inc. | Houston, TX 77252 | Oil & Gas Operator | Oct 1980 |
| 148 | Tri-Union Development Corp. | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 149 | Trinity River Energy Oper, LLC | Houston, TX 77008 | Oil & Gas Operator | May 2018 |
| 150 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 151 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 152 | Tygr Operating Company, LLC | | Oil & Gas Operator | Nov 2023 |
| 153 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 154 | Vernon E. Faulconer, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 2023 |
| 155 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Jan 2024 |
| 156 | Vista Resources LLC | Teague, TX 75860 | Oil & Gas Operator | Apr 2024 |
| 157 | Wessely Energy Company | Dallas, TX 75206 | Oil & Gas Operator | May 2001 |
| 158 | Wessely Energy Corporation | | Oil & Gas Operator | Feb 1989 |
| 159 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 160 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Apr 2024 |
| 161 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Apr 2024 |
| 162 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Apr 2024 |
| 163 | Williamson Oil & Gas, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Dec 2023 |
| 164 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |