| 101 | Oxy USA WTP LP | Houston, TX 77046 | Oil & Gas Operator | May 2024 |
| 102 | Paluxy Oil & Gas, LLC | Forney, TX 75126 | Oil & Gas Operator | May 2024 |
| 103 | Panhandle Oil & Gas Inc | Oklahoma City, OK 73112-5688 | Oil & Gas Operator | May 2007 |
| 104 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 105 | Patno Oil & Gas Company | Zapata, TX 78076 | Oil & Gas Operator | May 2024 |
| 106 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 107 | Patton, E. N. Oil Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2024 |
| 108 | Perdido Energy, LLC | Houston, TX 77251 | Oil & Gas Operator | May 2024 |
| 109 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 110 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | May 2024 |
| 111 | Pogo Panhandle 2004, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2017 |
| 112 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 113 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Mar 2024 |
| 114 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 115 | Proex Energy Management, L.L.C. | Spring, TX 77386 | Oil & Gas Operator | May 2024 |
| 116 | Pure Resources, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2006 |
| 117 | Purvis Operating Co. | Midland, TX 79710 | Oil & Gas Operator | May 2024 |
| 118 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 119 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 120 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2024 |
| 121 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 122 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 123 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | May 2024 |
| 124 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 125 | Rosewood Resources, Inc. | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 126 | S & C Construction, Inc. | Whitefish, MT 59937 | Oil & Gas Operator | May 2024 |
| 127 | Santa Fe Energy Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 128 | Santa Fe Snyder Corporation | Houston, TX 77024 | Oil & Gas Operator | Oct 2000 |
| 129 | SDMB Resources LLC | Graham, TX 76450 | Gas Operator | May 2024 |
| 130 | SDX Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | May 2024 |
| 131 | Sed Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2024 |
| 132 | Sheer Energy, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2024 |
| 133 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 134 | Silver Oil & Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | May 2024 |
| 135 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 136 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 137 | Stoltz, Deane H. | Midland, TX 79710 | Oil & Gas Operator | Oct 2000 |
| 138 | Stone, J. G. Oil Co. | Victoria, TX 77904 | Oil & Gas Operator | Sep 2018 |
| 139 | Stroube Energy Corporation | Dallas, TX 75248 | Oil & Gas Operator | Jan 2012 |
| 140 | Synergy Oil & Gas, Inc. (A) | Houston, TX 77024 | Oil & Gas Operator | Aug 2001 |
| 141 | Synergy Oil & Gas, L.P. | Houston, TX 77024 | Oil & Gas Operator | May 2012 |
| 142 | Talus Inc | Graham, TX 76450-1210 | Oil & Gas Operator | Feb 2017 |
| 143 | Tema Oil And Gas Company | Houston, TX 77084 | Oil & Gas Operator | May 2024 |
| 144 | Tesoro E&P Company, L.P. | San Antonio, TX 78216 | Oil & Gas Operator | Jan 2000 |
| 145 | Texas Secondary Oil Corporation | Devine, TX 78016 | Oil & Gas Operator | May 2024 |
| 146 | Texland Petroleum Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2007 |
| 147 | Texland Petroleum, L.P. | Fort Worth, TX 76107 | Oil & Gas Operator | May 2024 |
| 148 | Texland-Rector & Schumacher | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 149 | Thomas Oil And Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | May 2019 |
| 150 | Thompson, J. Cleo | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 151 | Thompson, Richard W. Inc. | Plano, TX 75024 | Oil & Gas Operator | May 2024 |
| 152 | Three Forks Resources LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | May 2024 |
| 153 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 154 | Tidwell Production Company | Sonora, TX 76950 | Oil & Gas Operator | May 2024 |
| 155 | Torch Operating Company | Houston, TX 77010 | Oil & Gas Operator | Mar 2015 |
| 156 | Transtexas Gas Corporation | Houston, TX 77265 | Oil & Gas Operator | Aug 2005 |
| 157 | TXP, Incorporated | San Angelo, TX 76906 | Oil & Gas Operator | May 2024 |
| 158 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 159 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 160 | Union Pacific Resources Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Sep 2002 |
| 161 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | May 2024 |
| 162 | Upp Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2024 |
| 163 | Vanguard Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2021 |
| 164 | Vanguard Permian LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2018 |
| 165 | Vicars Oil & Gas Corporation | Bowie, TX 76230 | Gas Operator | Jul 2010 |
| 166 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 167 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | May 2024 |
| 168 | Willo Oil & Gas Exploration, LLC | Boerne, TX 78006 | Oil & Gas Operator | Jul 2020 |
| 169 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 170 | Winn Exploration Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | May 2024 |
| 171 | Wolfcamp Energy, LLC | Plano, TX 75024 | Gas Operator | May 2024 |
| 172 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 173 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | May 2024 |