| 101 | Parker Operating Co., Inc. | Aledo, TX 76008 | Oil & Gas Operator | Sep 2000 |
| 102 | Peak Energy Operating #2, LLC | Durango, CO 81301 | Oil & Gas Operator | Jun 2006 |
| 103 | Peak Operating Of Texas, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2005 |
| 104 | Phillips, Bob | Weatherford, TX 76086 | Oil & Gas Operator | Nov 2019 |
| 105 | Precision Operating Inc. | Richardson, TX 75080 | Oil & Gas Operator | Jul 2014 |
| 106 | Premier Natural Resources II,LLC | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2015 |
| 107 | Premier Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2025 |
| 108 | Proco Operating Co., Inc. | Graford, TX 76449 | Oil & Gas Operator | Dec 2025 |
| 109 | Producers Engineering Company | Destin, FL 32541 | Oil & Gas Operator | Sep 1999 |
| 110 | Progas Properties, Inc. | New Braunfels, TX 78132 | Oil & Gas Operator | Dec 2025 |
| 111 | Quicksilver Resources Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2018 |
| 112 | R.P.Wilson, Inc. | Stephenville, TX 76401 | Oil & Gas Operator | Jan 2011 |
| 113 | Radius Operating, LLC | Round Rock, TX 78664 | Oil & Gas Operator | Dec 2025 |
| 114 | Ranch VIew Resources LLC | Houston, TX 77007 | Gas Operator | Aug 2016 |
| 115 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 116 | Rebel Energy, LTD. | Weatherford, TX 76087 | Gas Operator | Nov 2018 |
| 117 | Regal Energy Corporation | Rhome, TX 76078 | Oil & Gas Operator | Dec 2025 |
| 118 | Regal Energy Operating, L.L.C. | Plano, TX 75024 | Oil & Gas Operator | Dec 2025 |
| 119 | Reichmann Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Dec 2025 |
| 120 | Republic Energy Inc. | Decatur, TX 76234 | Oil & Gas Operator | Dec 2016 |
| 121 | Republic Energy Operating, LLC | Decatur, TX 76234 | Oil & Gas Operator | Jan 2016 |
| 122 | Richey, Ray Management Co., Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Dec 2025 |
| 123 | Richman Petroleum Corp. | Grapevine, TX 76051 | Oil & Gas Operator | Jul 2006 |
| 124 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 125 | Rollo Resources, LLC | Granbury, TX 76049 | Gas Operator | Dec 2025 |
| 126 | Royale Operating Company | San Diego, CA 92108 | Oil & Gas Operator | Apr 1996 |
| 127 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 128 | Sage Natural Resources LLC | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2025 |
| 129 | Samco Oil & Gas Co. | Granbury, TX 76048 | Gas Operator | Feb 2002 |
| 130 | Sauder Management Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 131 | Serendipity Exploration, Inc. | Weatherford, TX 76087 | Gas Operator | May 1997 |
| 132 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 133 | Sitton, Ronnie Incorporated | Graford, TX 76449 | Oil & Gas Operator | Feb 2020 |
| 134 | Slate Holdings, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Dec 2025 |
| 135 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 136 | Spindletop Drilling Co. | Dallas, TX 75230 | Oil & Gas Operator | Dec 2025 |
| 137 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Dec 2025 |
| 138 | St Johns Operating #1 LP | Houston, TX 77060 | Oil & Gas Operator | Aug 2023 |
| 139 | Star Of Texas Energy SRVS, Inc. | Austin, TX 78702 | Oil & Gas Operator | Dec 2025 |
| 140 | Stephens & Johnson Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 141 | Stringer Oil & Gas Co., Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Oct 1996 |
| 142 | Sullivan, Hollis R. Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Feb 2009 |
| 143 | Sun-Key Oil Co., Inc. | Dublin, TX 76446 | Oil & Gas Operator | Dec 2025 |
| 144 | Swaim, Charles | Tolar, TX 76476 | Oil & Gas Operator | Apr 2020 |
| 145 | TDC Engineering, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 146 | Telesis Operating Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2025 |
| 147 | Tep Barnett USA, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 148 | Texland-Rector & Schumacher | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2000 |
| 149 | Texxol Operating Company, Inc. | Fort Worth, TX 76108 | Oil & Gas Operator | Dec 2025 |
| 150 | Titan Operating, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2012 |
| 151 | Tree Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 152 | Tres Azores Oil & Gas, Inc. | Fort Worth, TX 76185 | Oil & Gas Operator | Aug 2003 |
| 153 | Trinity River Energy Oper, LLC | Houston, TX 77008 | Oil & Gas Operator | May 2018 |
| 154 | Triton Oil & Gas Corp. | Houston, TX 77002 | Oil & Gas Operator | Nov 2014 |
| 155 | Upp Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 156 | Vanco Oil & Gas Corp. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 157 | Vantage Fort Worth Energy LLC | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2025 |
| 158 | Venado Operating Company LLC | Austin, TX 78738 | Oil & Gas Operator | Mar 2022 |
| 159 | WCWB Energy, LLC | Midland, TX 79701 | Oil Operator | Sep 2015 |
| 160 | Wells Oilfield Services, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 161 | Western Reserves Corporation | Abilene, TX 79608 | Oil & Gas Operator | Jan 2008 |
| 162 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 163 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Dec 2025 |
| 164 | Wheat, Buck Resources, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2009 |
| 165 | Williams Prod. Gulf Coast, L.P. | Benbrook, TX 76126 | Oil & Gas Operator | Jan 2012 |
| 166 | Willis Operating Co. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 167 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 168 | WPX Energy Gulf Coast, LP | Benbrook, TX 76126 | Oil & Gas Operator | May 2012 |
| 169 | Wyoming Diamond A LLC | Cheyenne, WY 82007 | Gas Operator | Dec 2025 |
| 170 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 171 | Young Marshall R Oil Co | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |