| 101 | Grand Energy, Inc. | Dallas, TX 75248 | Oil & Gas Operator | Oct 2002 |
| 102 | Graward Operating, Inc. | Tyler, TX 75702 | Oil & Gas Operator | May 2025 |
| 103 | Graystone Energy Corporation | Judson, TX 75660 | Oil & Gas Operator | May 2025 |
| 104 | Green River Resources Inc. | Keystone, CO 80435 | Oil & Gas Operator | May 2025 |
| 105 | Griffin Operating, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Mar 2017 |
| 106 | Grizzly Op Of Delaware, LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2021 |
| 107 | Gruy Petroleum Management Co. | Irving, TX 75014 | Oil & Gas Operator | Nov 2014 |
| 108 | GTG Operating, LLC | Tyler, TX 75702 | Oil & Gas Operator | May 2025 |
| 109 | H & S Drilling Co Inc | Frazeysburg, OH 43822-0040-0040 | Oil & Gas Operator | Dec 2016 |
| 110 | Hankamer, Curtis Corporation,The | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 111 | Hansen Oil Corporation | Shreveport, LA 71106 | Oil Operator | Apr 2003 |
| 112 | Hanson Production Company | Cuero, TX 77954 | Oil & Gas Operator | Jul 2009 |
| 113 | Hibbard Energy, LP | Whitehouse, TX 75791 | Oil & Gas Operator | May 2025 |
| 114 | Highmark Energy Operating, LLC | Dallas, TX 75222 | Oil & Gas Operator | May 2025 |
| 115 | Hill Production Company | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2009 |
| 116 | Howard, Anthony E. F. | Tyler, TX 75701 | Oil & Gas Operator | Jun 2001 |
| 117 | HS Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Dec 2005 |
| 118 | Huber J M Corp | Edison, NJ 08837 | Oil & Gas Operator | May 2025 |
| 119 | Hunt Industries, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Nov 2000 |
| 120 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 121 | Hunt Petroleum Corporation | Dallas, TX 75201 | Oil & Gas Operator | Nov 2008 |
| 122 | Ipact | Austin, TX 78734 | Oil & Gas Operator | May 2025 |
| 123 | Ironwood Oil & Gas LLC | Houston, TX 77067 | Oil & Gas Operator | Jun 2014 |
| 124 | J-Car Operating, Inc. | Lindale, TX 75771 | Oil & Gas Operator | Mar 1997 |
| 125 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | May 2025 |
| 126 | Jacobi-Johnson Energy, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 1998 |
| 127 | Jay Management Company LLC | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 128 | John P. Bogdanich Operating, LLC | Kilgore, TX 75663 | Oil Operator | May 2025 |
| 129 | Joy Resources, Inc. | Houston, TX 77027 | Oil & Gas Operator | May 2025 |
| 130 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | May 2025 |
| 131 | Kayuga Co. | Tulsa, OK 74133 | Oil & Gas Operator | May 2025 |
| 132 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 133 | KCS Resources LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 134 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 135 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Mar 2025 |
| 136 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 137 | Kraker & Martin Energy, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2011 |
| 138 | KTP Energy, Inc. | Denver, CO 80226 | Oil & Gas Operator | Aug 2019 |
| 139 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 140 | Lease Holders Acquisitions LLC | Yukon, OK 73099 | Gas Operator | May 2025 |
| 141 | Leopard, Glenn | Malakoff, TX 75148 | Oil & Gas Operator | Aug 2003 |
| 142 | LKD Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2018 |
| 143 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | May 2025 |
| 144 | Lone Star Gas Co. | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 145 | Lone Star Pipeline Company | Dallas, TX 75201 | Oil & Gas Operator | Jul 1999 |
| 146 | M5 Standing Energy, LLC | Decatur, TX 76234 | Oil & Gas Operator | May 2025 |
| 147 | Mallory, Meredith, Jr. | San Antonio, TX 78209 | Oil & Gas Operator | Jul 2002 |
| 148 | Map Production Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 149 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Mar 2025 |
| 150 | Marshall & Winston, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 151 | Mass Energy, Inc | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 152 | Maxima Energy Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2012 |
| 153 | Maximus Operating, LTD. | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 154 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 155 | Midcoast G & P (East Texas) L.P. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 156 | Miller Energy Inc | Houston, TX 77024 | Oil & Gas Operator | Oct 2016 |
| 157 | Miller Production Co. | Tyler, TX 75701 | Oil & Gas Operator | May 2025 |
| 158 | Miller, Mike / Miller Prod. Co. | Corsicana, TX 75110 | Oil & Gas Operator | May 2025 |
| 159 | Montgomery Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2007 |
| 160 | Moon Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Mar 2003 |
| 161 | Mosbacher Energy Company | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 162 | Mueller Exploration, Inc. | Portland, TX 78374 | Oil & Gas Operator | May 2025 |
| 163 | Munson Operating, Inc. | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 164 | Munson, Charles C. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2002 |
| 165 | Munson, David M. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 166 | Munson, David M. Inc. | Dallas, TX 75251 | Oil & Gas Operator | May 2025 |
| 167 | Murchison, G. B. Trust | Dallas, TX 75283 | Oil & Gas Operator | Sep 1994 |
| 168 | Mustang Drilling, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Aug 2024 |
| 169 | Nadel And Gussman | Tulsa, OK 74103 | Oil & Gas Operator | May 2007 |
| 170 | Nadel And Gussman, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | May 2025 |
| 171 | New Horizon Resources LLC | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 172 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | May 2025 |
| 173 | North Central Oil Corp | Houston, TX 77252 | Oil & Gas Operator | Dec 2005 |
| 174 | O'Benco, Inc. | Shreveport, LA 71136 | Oil & Gas Operator | May 2025 |
| 175 | O'Brien Resources LLC | Shreveport, LA 71136 | Oil Operator | Nov 2017 |
| 176 | O'Ryan Oil And Gas | Odessa, TX 79768 | Oil & Gas Operator | May 2025 |
| 177 | Ocean Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 178 | One Tec Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2007 |
| 179 | Optimum Exploration LLC | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 180 | P-R-O Management, Inc. | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 181 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 182 | Palmer Petroleum Inc. | Shreveport, LA 71105 | Oil & Gas Operator | May 2025 |
| 183 | Panhandle Oil & Gas Inc | Oklahoma City, OK 73112-5688 | Oil & Gas Operator | May 2007 |
| 184 | Par Minerals Corporation | Shreveport, LA 71101 | Oil & Gas Operator | May 2025 |
| 185 | Pardee Production Co. | Skiatook, OK 74070 | Oil & Gas Operator | Mar 2021 |
| 186 | Park & Park Oil Co. | Allen, TX 75002 | Oil & Gas Operator | May 2025 |
| 187 | PDH Enterprises | Pittsburg, TX 75686 | Oil & Gas Operator | Apr 2019 |
| 188 | Peak Energy Corporation | Plano, TX 75093 | Oil & Gas Operator | Oct 2018 |
| 189 | Pearl Petroleum Inc | Lawton, OK 73501-5821 | Oil & Gas Operator | Jan 2014 |
| 190 | Pennzenergy Exp. & Prod., L.L.C. | Houston, TX 77210 | Oil & Gas Operator | Mar 2000 |
| 191 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 192 | Permian Natural Resources | Pflugerville, TX 78660 | Oil & Gas Operator | May 2025 |
| 193 | Perryman Exp. And Prod., LLC | Athens, TX 75751 | Oil & Gas Operator | May 2025 |
| 194 | Perryman Operating Company | Athens, TX 75751 | Oil & Gas Operator | May 2025 |
| 195 | Petralis Energy Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 196 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 197 | Petrocorp Incorporated,A TX.Corp | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2005 |
| 198 | Phillips Energy, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2018 |
| 199 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 200 | Phillips, Jack L. | Gladewater, TX 75647 | Oil & Gas Operator | Dec 1997 |