| 101 | Houston Expl. & Prod. Co., Inc. | Austin, TX 78746 | Oil & Gas Operator | Aug 2003 |
| 102 | Hydrocarbon Operating, Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 103 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 104 | Ineos USA Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Jul 2025 |
| 105 | J3 Operating LLC | Spurger, TX 77660 | Oil & Gas Operator | Aug 2024 |
| 106 | Jay Management Company LLC | Houston, TX 77057 | Oil & Gas Operator | Jul 2025 |
| 107 | Jeffcoat Production Company Inc. | Spurger, TX 77660 | Oil & Gas Operator | Oct 2024 |
| 108 | JHP Operating, LLC | Dallas, TX 75225 | Oil & Gas Operator | Jul 2025 |
| 109 | JMC Resources Corp. | Houston, TX 77077 | Oil & Gas Operator | Jul 2025 |
| 110 | Jurassic Exploration, Inc. | Longview, TX 75601 | Oil & Gas Operator | Jul 2025 |
| 111 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Jul 2025 |
| 112 | KCM Management, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2014 |
| 113 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Jul 2025 |
| 114 | Keene, Roy J. Jr. | Sugar Land, TX 77498 | Oil & Gas Operator | Jun 2016 |
| 115 | Kelpetro, Inc. | Houston, TX 77056 | Oil & Gas Operator | Mar 2012 |
| 116 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 117 | Krescent Energy Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2013 |
| 118 | Lake Ronel Oil Company | Tyler, TX 75710 | Oil & Gas Operator | Jul 2017 |
| 119 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 120 | Liberty Operating Company, Inc. | Lake Dallas, TX 75065 | Oil & Gas Operator | Mar 2008 |
| 121 | Litchfield Production Co. | Nederland, TX 77627 | Oil & Gas Operator | Jul 2025 |
| 122 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | Jul 2025 |
| 123 | Loin Energy Corporation | La Grange, TX 78945 | Oil & Gas Operator | Jul 2025 |
| 124 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 125 | Low-End Oil LLC | Austin, TX 78748 | Oil Operator | Jul 2025 |
| 126 | Lucky Lad Energy, LLC | Magnolia, TX 77353 | Oil & Gas Operator | Jul 2025 |
| 127 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jul 2025 |
| 128 | Magnum Producing, LP | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jul 2025 |
| 129 | Marmaton Oil Company | Houston, TX 77002 | Oil & Gas Operator | Jul 1998 |
| 130 | Martineau Petroleum, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 2025 |
| 131 | McDaniel Company, Inc., The | Dallas, TX 75230 | Oil & Gas Operator | Jul 2025 |
| 132 | McDonnold Operating, Inc. | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 133 | McGehee, George T. Operating Co. | Houston, TX 77024 | Oil & Gas Operator | Oct 1997 |
| 134 | Memorial Exploration Company | Saint Louis, MO 63105 | Oil & Gas Operator | Aug 1996 |
| 135 | Memorial Production Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 136 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2025 |
| 137 | Middle Bay Oil Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 138 | Milestone Operating, Inc. | Montgomery, TX 77316 | Oil & Gas Operator | Jul 2025 |
| 139 | Miller Energy Inc | Houston, TX 77024 | Oil & Gas Operator | Oct 2016 |
| 140 | Miocene Oil & Gas, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jul 1998 |
| 141 | Miocene Oil & Gas, LTD. | Englewood, CO 80110 | Oil & Gas Operator | Jul 2025 |
| 142 | Morgan Enterprises, Inc. | Houston, TX 77024 | Oil & Gas Operator | Jul 2025 |
| 143 | Morris, W. Dale Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Jul 2025 |
| 144 | Mosman Operating, LLC | Dallas, TX 75204 | Oil Operator | Jul 2025 |
| 145 | Murphy Exploration & Prod. Co. | Houston, TX 77094 | Oil & Gas Operator | Jun 2011 |
| 146 | Murphy Oil USA Inc | New Orleans, LA 70161 | Oil & Gas Operator | Jan 1993 |
| 147 | Mustang Drilling, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Aug 2024 |
| 148 | Mustang Drilling, LTD. | Henderson, TX 75653 | Oil & Gas Operator | May 2008 |
| 149 | Nadsoilco LLC | Chicago, IL 60606 | Oil & Gas Operator | Jul 2025 |
| 150 | Navidad Operating Company, LLC | Flint, TX 75762 | Oil & Gas Operator | Jan 2025 |
| 151 | Neches Transport Inc. | Spurger, TX 77660 | Oil & Gas Operator | Jul 2025 |
| 152 | Neumin Production Company | Point Comfort, TX 77978 | Oil & Gas Operator | Jul 2025 |
| 153 | New Century Exploration, Inc. | Spring, TX 77379 | Oil & Gas Operator | Jul 2025 |
| 154 | Northwind Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 1995 |
| 155 | O'Benco, Inc. | Shreveport, LA 71136 | Oil & Gas Operator | Jul 2025 |
| 156 | Oil Well Buyers Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2024 |
| 157 | Olipdp II, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Jul 2025 |
| 158 | P.O.S. Energy, Inc. | Buna, TX 77612 | Oil & Gas Operator | Jul 2025 |
| 159 | Panther Bayou Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Apr 2021 |
| 160 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 161 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 162 | Pecos Petroleum Company | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 163 | Permian Natural Resources | Pflugerville, TX 78660 | Oil & Gas Operator | Jul 2025 |
| 164 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 165 | Petro-Smith Operating LLC | Houston, TX 77010 | Oil & Gas Operator | Jul 2025 |
| 166 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Jul 2025 |
| 167 | Petronomics, Inc. | Houston, TX 77074 | Oil & Gas Operator | Aug 2003 |
| 168 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 169 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 170 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 171 | Premium Exploration Company | Early, TX 76803 | Oil & Gas Operator | Jul 2025 |
| 172 | Prime Time Oil & Gas Co., LTD. | Ruidoso, NM 88345 | Oil & Gas Operator | Mar 2003 |
| 173 | Pringle Resources, Inc. | Houston, TX 77019 | Oil & Gas Operator | Jul 2025 |
| 174 | Prize Exploration & Prod, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jul 2025 |
| 175 | Quail Creek Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Jul 2025 |
| 176 | Quintx Exploration, Inc. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | Nov 2007 |
| 177 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 178 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 179 | Resaca Resources, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Jul 2025 |
| 180 | Rife Oil Properties Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Jul 2025 |
| 181 | Rio Bravo Oil Company | The Woodlands, TX 77381 | Oil & Gas Operator | Feb 2002 |
| 182 | Rki Energy Resources, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2021 |
| 183 | Roberson Oil Company | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 184 | Rockland Oil Company | Addison, TX 75001 | Oil & Gas Operator | May 2025 |
| 185 | Rusk Energy Operating LLC | Houston, TX 77040 | Oil & Gas Operator | Jul 2025 |
| 186 | S & J Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Mar 2015 |
| 187 | Sanchez Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 188 | Sandalwood Exploration, L.P. | Houston, TX 77056 | Oil & Gas Operator | Jul 2025 |
| 189 | Santos USA Corp. | Houston, TX 77042 | Oil & Gas Operator | Dec 2008 |
| 190 | Schwab City Resources | Leggett, TX 77350 | Oil & Gas Operator | Aug 2013 |
| 191 | Seminole Production Co. | Silsbee, TX 77656 | Oil & Gas Operator | Oct 2002 |
| 192 | Setex Oil And Gas Company | Houston, TX 77002 | Oil & Gas Operator | Feb 2012 |
| 193 | Shoco Production, L.P. | Kilgore, TX 75663 | Oil & Gas Operator | May 2020 |
| 194 | Silver Oak Energy, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2016 |
| 195 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2025 |
| 196 | Sonoble Operating, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Jun 2003 |
| 197 | Southcoast Production Inc | Houston, TX 77010 | Oil & Gas Operator | Jul 2025 |
| 198 | Southern Bay Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 199 | Southern Resource Company | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Mar 2022 |
| 200 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |