| 101 | Mulloy, J. W. Associates, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jan 2003 |
| 102 | Muskegon Development Company | MT Pleasant, MI 48858 | Oil & Gas Operator | Oct 2025 |
| 103 | MWWD Operator, LLC | Victoria, TX 77904 | Oil Operator | Oct 2025 |
| 104 | Newfield Exploration Company | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2017 |
| 105 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | Oct 2025 |
| 106 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 107 | Now Development Co., Inc. | Tyler, TX 75702 | Oil & Gas Operator | Dec 2017 |
| 108 | Oakridge Energy, Inc. | Wichita Falls, TX 76302 | Oil & Gas Operator | Oct 2025 |
| 109 | Occidental Permian LTD. | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 110 | Ocean Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 111 | Olsen Energy Inc. | Boerne, TX 78006 | Oil & Gas Operator | Oct 2025 |
| 112 | Paluxy Sands Corporation | Sonora, TX 76950 | Oil & Gas Operator | Jun 2012 |
| 113 | Par Minerals Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 114 | Paragon Corporation | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 115 | Patrick Exploration Company | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2011 |
| 116 | Penn VIrginia Oil & Gas, L.P. | Houston, TX 77084 | Oil & Gas Operator | Nov 2022 |
| 117 | Penwell Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Oct 2025 |
| 118 | Perlman,I.H.Oil & Gas Properties | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 119 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 120 | PNP Operating Company LLC | San Antonio, TX 78230 | Oil Operator | Oct 2025 |
| 121 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 122 | Polecat Pipeline Company, Inc. | Corpus Chrsti, TX 78401 | Gas Operator | May 1997 |
| 123 | Pruitt Engineering & Petro. Co. | Kerrville, TX 78028 | Oil & Gas Operator | Jul 2007 |
| 124 | PXP Texas Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2007 |
| 125 | Qualia, C. F. Operating,Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2013 |
| 126 | Quintana Minerals Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2003 |
| 127 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 128 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2025 |
| 129 | Regal Development Inc. | Eldorado, TX 76936 | Gas Operator | Jul 1996 |
| 130 | Regal Petroleum Services | Euless, TX 76039 | Oil & Gas Operator | Aug 2002 |
| 131 | Rendova Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2002 |
| 132 | Rio Bravo Expl. & Prod. Co. | Houston, TX 77055 | Oil & Gas Operator | Apr 2020 |
| 133 | Rio-Tex, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2025 |
| 134 | Robert C. Brower, LLC | Southlake, TX 76092 | Oil & Gas Operator | Oct 2025 |
| 135 | Rocksprings Energy Company LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 1997 |
| 136 | Rover Petroleum Operating, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |
| 137 | Saga Petroleum LLC Of Colorado | Norman, OK 73072 | Oil & Gas Operator | Oct 2025 |
| 138 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Oct 2025 |
| 139 | Saguaro Petroleum, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 140 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 141 | SDX Resources, Inc. | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 142 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 143 | Seagull Midcon Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 144 | Sed Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 145 | Sha-Jam Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 146 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 147 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 148 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 149 | Statex Petroleum Inc | Dallas, TX 75229 | Oil & Gas Operator | Dec 2000 |
| 150 | Stone, J. G. Oil Co. | Victoria, TX 77904 | Oil & Gas Operator | Sep 2018 |
| 151 | Stonegate Production Company,LLC | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 152 | Swartz Oil Company | San Angelo, TX 76906 | Oil & Gas Operator | Oct 2025 |
| 153 | Tammany Exploration Company LLC | Houston, TX 77070 | Gas Operator | Jul 2012 |
| 154 | Tejas Trucking, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Oct 2025 |
| 155 | Tesoro E&P Company, L.P. | San Antonio, TX 78216 | Oil & Gas Operator | Jan 2000 |
| 156 | Texaco E & P Inc | Houston, TX 77099 | Oil & Gas Operator | Oct 2025 |
| 157 | Texakoma E & P, LLC | Plano, TX 75024 | Oil & Gas Operator | Oct 2025 |
| 158 | Texakoma Oil & Gas Corp | Dallas, TX 75240 | Oil & Gas Operator | Sep 2014 |
| 159 | Texas Secondary Oil Corporation | Devine, TX 78016 | Oil & Gas Operator | Oct 2025 |
| 160 | Thompson, J. Cleo | Dallas, TX 75201 | Oil & Gas Operator | May 2024 |
| 161 | Three Rivers Operating Co LLC | Austin, TX 78735 | Oil & Gas Operator | Mar 2017 |
| 162 | Toc Energy Resources, LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Oct 2025 |
| 163 | Trilogy Operating, Inc. | Midland, TX 79708 | Oil & Gas Operator | Oct 2025 |
| 164 | Triple "S" Resources Inc | Sapulpa, OK 74066 | Oil & Gas Operator | Jun 1995 |
| 165 | TXP, Incorporated | San Angelo, TX 76906 | Oil & Gas Operator | Oct 2025 |
| 166 | Uhc Petroleum Corporation | Rocksprings, TX 78880 | Oil & Gas Operator | Oct 2025 |
| 167 | Ultra Resources Inc | Houston, TX 77060 | Oil & Gas Operator | Sep 2018 |
| 168 | Upp Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 169 | Vicars Oil & Gas Corporation | Bowie, TX 76230 | Gas Operator | Jul 2010 |
| 170 | Vintage Petroleum, LLC | Houston, TX 77210 | Oil & Gas Operator | Dec 2019 |
| 171 | Vision Oil And Gas LLC | Laredo, TX 78041 | Oil & Gas Operator | Oct 2025 |
| 172 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 173 | Winchester Energy Operating Co. | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 174 | Wright Brothers Energy, Inc. | Boerne, TX 78006 | Oil & Gas Operator | Oct 2025 |
| 175 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 176 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |