| 101 | Geotech Production Inc | Centennial, CO 80016 | Oil & Gas Operator | Jun 2020 |
| 102 | Goodrich Pet. Co. Of Louisiana | Houston, TX 77002 | Oil & Gas Operator | Mar 2008 |
| 103 | Gordy Oil Company | Houston, TX 77007 | Oil & Gas Operator | Mar 2025 |
| 104 | Grace Petroleum Corp. | Tulsa, OK 74103 | Oil & Gas Operator | Oct 1997 |
| 105 | Grand Resources Inc | Tulsa, OK 74137 | Oil & Gas Operator | Mar 2025 |
| 106 | Grimes Energy Company | Abilene, TX 79604 | Oil & Gas Operator | Mar 2005 |
| 107 | Gulf Tide Oil Company, The | Houston, TX 77008 | Oil & Gas Operator | Jun 1999 |
| 108 | Gulfmark Energy Inc | Houston, TX 77027 | Gas Operator | Apr 2023 |
| 109 | H.E.R. Operating, LLC | Silsbee, TX 77656 | Oil & Gas Operator | Mar 2025 |
| 110 | Hamman Oil & Refining Company | Houston, TX 77098 | Oil & Gas Operator | Mar 2025 |
| 111 | Hardwick Oil Company | Sugar Land, TX 77478 | Oil & Gas Operator | Nov 2014 |
| 112 | Hawthorne Oil And Gas Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1993 |
| 113 | Hilcorp Energy Company | Houston, TX 77208 | Oil & Gas Operator | Mar 2025 |
| 114 | Hinton Production Company | MT Pleasant, TX 75455 | Oil & Gas Operator | Aug 1995 |
| 115 | Houston Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Mar 2025 |
| 116 | Houston Resources Corp. | Houston, TX 77002 | Oil & Gas Operator | Apr 2003 |
| 117 | Hunt Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Mar 2025 |
| 118 | Indexgeo & Associates, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2009 |
| 119 | Infinity Hydrocarbons LLC | Houston, TX 77079 | Oil & Gas Operator | Aug 2022 |
| 120 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Mar 2025 |
| 121 | Iron Ridge Operating, LLC | Austin, TX 78738 | Oil & Gas Operator | Mar 2025 |
| 122 | Jacobi-Johnson Energy, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Dec 1998 |
| 123 | Jandar Exploration | Henderson, TX 75653 | Oil & Gas Operator | Dec 1994 |
| 124 | Jandar Exploration, L. C. | Tyler, TX 75703 | Oil & Gas Operator | Mar 2025 |
| 125 | Jeffcoat Production Company Inc. | Spurger, TX 77660 | Oil & Gas Operator | Oct 2024 |
| 126 | Jet Oil Producers, Inc. | Coldspring, TX 77331 | Oil & Gas Operator | Mar 2025 |
| 127 | JMC Resources Corp. | Houston, TX 77077 | Oil & Gas Operator | Mar 2025 |
| 128 | Jordan Drilling Co. | Leggett, TX 77350 | Oil & Gas Operator | Aug 1998 |
| 129 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Mar 2025 |
| 130 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Mar 2025 |
| 131 | Kelpetro, Inc. | Houston, TX 77056 | Oil & Gas Operator | Mar 2012 |
| 132 | Kenneth W. Cory, LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Dec 2024 |
| 133 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jan 2025 |
| 134 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 135 | Kimball Production Co. | Houston, TX 77042 | Oil & Gas Operator | Jul 2002 |
| 136 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 137 | Kriti Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2012 |
| 138 | Lake Ronel Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Jul 2017 |
| 139 | Lawton, Jack Inc. | Sulphur, LA 70663 | Oil & Gas Operator | Dec 1995 |
| 140 | Lilley, C.C., Inc. | Dallardsville, TX 77332 | Oil & Gas Operator | Mar 2025 |
| 141 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Aug 2024 |
| 142 | Linn Operating, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2017 |
| 143 | Llewellin Operating Company, LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2017 |
| 144 | Lobo Energy, Inc. | Laredo, TX 78044 | Oil & Gas Operator | Nov 1996 |
| 145 | Lobo Operating, Inc. | Houston, TX 77077 | Oil & Gas Operator | Dec 2024 |
| 146 | Lobo Resources, LTD. | Houston, TX 77077 | Oil & Gas Operator | Apr 1994 |
| 147 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 148 | Lucky Lad Energy, LLC | Magnolia, TX 77353 | Oil & Gas Operator | Mar 2025 |
| 149 | Lynbrook Oil Company | Houston, TX 77057 | Oil & Gas Operator | Dec 2008 |
| 150 | M.J.O.G., Inc. | Fort Smith, AR 72903 | Oil Operator | Mar 2015 |
| 151 | Marino, Charles B. | Tomball, TX 77377 | Oil & Gas Operator | Mar 2025 |
| 152 | Mark L Shidler Inc | Houston, TX 77055 | Oil & Gas Operator | Jan 2025 |
| 153 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 154 | McCauley, F. R. | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 155 | McDonald Production | Lubbock, TX 79408 | Oil & Gas Operator | Mar 2003 |
| 156 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 157 | McGowan Working Partners, Inc. | Jackson, MS 39296 | Oil & Gas Operator | Mar 2025 |
| 158 | McRae Exploration & Prod., Inc. | Houston, TX 77064 | Oil & Gas Operator | Feb 2017 |
| 159 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 160 | Meridian Oil Inc. | Houston, TX 77210 | Oil & Gas Operator | Aug 1996 |
| 161 | Meridian Resource & Expl LLC,The | Houston, TX 77094 | Oil & Gas Operator | Nov 2012 |
| 162 | Merritt Operating, Inc. | Mineola, TX 75773 | Oil & Gas Operator | Mar 2025 |
| 163 | Merritt, William Kevin | Dallas, TX 75225 | Oil & Gas Operator | Dec 1994 |
| 164 | Mexco Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Feb 2020 |
| 165 | Millennium Exploration Co. LLC | San Antonio, TX 78232 | Oil & Gas Operator | Mar 2025 |
| 166 | Mitchell Energy Company L.P. | Spring, TX 77387 | Oil & Gas Operator | Mar 2008 |
| 167 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 168 | Mojac Energy Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 1997 |
| 169 | Murphy Energy Services, LP | Saratoga, TX 77585 | Oil Operator | Dec 2018 |
| 170 | Nadsoilco LLC | Dallas, TX 75204 | Oil & Gas Operator | Mar 2025 |
| 171 | Nearburg Producing Company | Dallas, TX 75380 | Oil & Gas Operator | Mar 2025 |
| 172 | Neches Transport Inc. | Spurger, TX 77660 | Oil & Gas Operator | Mar 2025 |
| 173 | Nei Production, Inc. | Nichols Hill, OK 73116 | Oil & Gas Operator | Mar 2025 |
| 174 | Newfield Exploration Company | The Woodlands, TX 77380 | Oil & Gas Operator | Jun 2017 |
| 175 | Nuevo Energy Company | Houston, TX 77002 | Oil & Gas Operator | Dec 2002 |
| 176 | Ocean Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 2003 |
| 177 | Odegard Energy, Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2020 |
| 178 | Oil Well Buyers Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2024 |
| 179 | Oily Dog Operators Texas, LLC | Austin, TX 78746 | Oil Operator | Mar 2025 |
| 180 | Old Pine Energy Corporation | Austin, TX 78755 | Oil Operator | Mar 2025 |
| 181 | Olipdp II, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Mar 2025 |
| 182 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 183 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | Mar 2025 |
| 184 | Paleo Oil Company LLC | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Mar 2025 |
| 185 | Palisades Operating Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 186 | Par Minerals Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2025 |
| 187 | Paradigm Exploration, L.P. | La Grange, TX 78945 | Oil Operator | Sep 2008 |
| 188 | Paradis Investments, L.L.C. | Bellaire, TX 77401 | Oil Operator | Jun 2020 |
| 189 | Pardue Oil, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Mar 2025 |
| 190 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2018 |
| 191 | Petro-Guard Production,L.L.C. | Houston, TX 77063 | Oil & Gas Operator | Dec 2024 |
| 192 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2025 |
| 193 | Petroglyph Operating Co | Boise, ID 83709 | Oil & Gas Operator | Jul 2017 |
| 194 | Petrotex Engineering Company | Cypress, TX 77429 | Oil & Gas Operator | Mar 2025 |
| 195 | Phillips 66 Company | Bartlesville, OK 74004 | Oil & Gas Operator | Aug 1997 |
| 196 | Placid Oil Company | Houston, TX 77227 | Oil & Gas Operator | Mar 2008 |
| 197 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 198 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 199 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 200 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Mar 2025 |