| 101 | Gunn Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 102 | Hale Oil & Gas Properties | Graham, TX 76450 | Oil & Gas Operator | Jul 1997 |
| 103 | Harper, William E. | Woodson, TX 76491 | Oil & Gas Operator | Jul 2016 |
| 104 | Hatcher, Ray | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2002 |
| 105 | Haynes & Shirley Production Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Dec 2025 |
| 106 | Henderson & Erickson, Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2025 |
| 107 | Henry Petroleum Corp. | Midland, TX 79703 | Oil & Gas Operator | Mar 2001 |
| 108 | Hexagon Oil And Gas Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Dec 2025 |
| 109 | High Plains Gas Systems, Inc. | Houston, TX 77019 | Oil & Gas Operator | Dec 2025 |
| 110 | Holden Energy Corporation | Ardmore, OK 73401 | Oil & Gas Operator | Mar 2015 |
| 111 | Hood, J. Frank, Jr. | Arlington, TX 76006 | Oil & Gas Operator | Dec 2025 |
| 112 | Hunter Brothers | Wichita Falls, TX 76302 | Oil & Gas Operator | Jul 2007 |
| 113 | HW Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 114 | Imperial Oil Company | Houston, TX 77073 | Oil & Gas Operator | Oct 2004 |
| 115 | Ipact | Austin, TX 78734 | Oil & Gas Operator | Dec 2025 |
| 116 | J & J Trading | Abilene, TX 79608 | Oil & Gas Operator | Dec 2004 |
| 117 | J&R Operating | Holliday, TX 76366 | Oil & Gas Operator | Feb 2024 |
| 118 | J-E Production, Inc. | Midland, TX 79708 | Oil & Gas Operator | Mar 2008 |
| 119 | J-O'B Operating Company | Shreveport, LA 71135 | Oil & Gas Operator | Dec 2025 |
| 120 | Jil Oil Corp. | San Antonio, TX 78279 | Oil & Gas Operator | Dec 2025 |
| 121 | Jin Petroleum LLC | New Braunfels, TX 78130 | Oil Operator | Dec 2025 |
| 122 | Jla Resources Company | Austin, TX 78746 | Oil & Gas Operator | Dec 2025 |
| 123 | Johnson & Ernst Operating Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2018 |
| 124 | Johnson, William D. | Fort Worth, TX 76116 | Oil & Gas Operator | Mar 2008 |
| 125 | Journey Operating LLC | Sugar Land, TX 77496 | Oil & Gas Operator | Aug 2006 |
| 126 | K. D. Operating LLC. | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 127 | Karper Oil & Gas Corporation | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 128 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Aug 2025 |
| 129 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 130 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Dec 2025 |
| 131 | Kinder Morgan Production Co LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 132 | Kinder Morgan Production Co LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2007 |
| 133 | King Operating Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | Dec 2025 |
| 134 | Kintex Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 135 | L7 Energy LLC | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 136 | Lakewood Operating, LTD. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 137 | Lankford, Dan L. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 138 | Livingston, F. L. | Megargel, TX 76370 | Oil & Gas Operator | May 2018 |
| 139 | LMG Operating Company, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2007 |
| 140 | LMH Energy | Wichita Falls, TX 76302 | Oil & Gas Operator | Dec 2025 |
| 141 | Lone Star Oil & Gas | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 142 | Long-Tex Exploration, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Dec 2025 |
| 143 | Loudon Operating Company, L.L.C. | Dallas, TX 75206 | Oil & Gas Operator | Dec 2025 |
| 144 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Dec 2025 |
| 145 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Dec 2025 |
| 146 | Martis Valley Energy, LLC | Wichita Falls, TX 76310 | Oil Operator | Dec 2025 |
| 147 | Masters Rat Hole Service, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 148 | Mayco Oil | Nocona, TX 76255 | Oil & Gas Operator | Dec 2025 |
| 149 | Mayfield Engineering Service | Tulsa, OK 74104 | Oil & Gas Operator | Dec 2025 |
| 150 | Mayo, Paul R. | Quinlan, TX 75474 | Oil & Gas Operator | May 1999 |
| 151 | McCown Engineering | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2025 |
| 152 | McMahon-Bullington Drilling Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 1996 |
| 153 | McMahon-Bullington LP | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2009 |
| 154 | Medders Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 155 | Mehaffey Investments, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2025 |
| 156 | Menasco, J. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2019 |
| 157 | Merit Energy Company | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 158 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2025 |
| 159 | Mid-Tex Energy Inc. | Costa Mesa, CA 92626 | Oil & Gas Operator | Jan 1999 |
| 160 | Middle Bay Oil Company, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1998 |
| 161 | Midland Oil And Gas, Inc. | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 162 | Midwestern Energy | Mankato, MN 56003 | Oil & Gas Operator | Dec 2025 |
| 163 | MM China Star Oil Co., LLC | Woodway, TX 76712 | Oil & Gas Operator | Dec 2025 |
| 164 | Monument Resources, Inc. | Castle Rock, CO 80104 | Oil & Gas Operator | Jun 2012 |
| 165 | Mueller Exploration, Inc. | Portland, TX 78374 | Oil & Gas Operator | Dec 2025 |
| 166 | Naumann Oil & Gas, Inc. | Austin, TX 78716 | Oil & Gas Operator | Dec 2025 |
| 167 | Nordan Oil & Gas Corporation | Abilene, TX 79604 | Oil & Gas Operator | Feb 2018 |
| 168 | Norman Oil Corporation | Abilene, TX 79608 | Oil & Gas Operator | Mar 2000 |
| 169 | Novo Exploration Corporation | Hurst, TX 76053 | Oil & Gas Operator | Jun 2020 |
| 170 | Oasis Operating, Inc. | Lubbock, TX 79404 | Oil & Gas Operator | Nov 2020 |
| 171 | Okie Operating Company, LTD. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 172 | Older Than Dirt LLC | Weatherford, TX 76086 | Oil & Gas Operator | Dec 2025 |
| 173 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 174 | P-Tex Petroleum, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Nov 1999 |
| 175 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 176 | Palmer, James W. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jul 2002 |
| 177 | Paradigm Exploration Company | Dallas, TX 75214 | Oil Operator | Sep 2020 |
| 178 | Paragon Corporation | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 179 | Paschal Petroleum, Inc. | Dallas, TX 75380 | Oil & Gas Operator | Apr 1994 |
| 180 | Patterson Petroleum LP | Snyder, TX 79550 | Oil & Gas Operator | Mar 2008 |
| 181 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 182 | Patton Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 183 | Patton, E. N. Oil Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Dec 2025 |
| 184 | Pearl, Bill H. Productions, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Dec 2025 |
| 185 | Ped Oil Corporation | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 186 | Perkins-Prothro Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2002 |
| 187 | Permian West Corp. | Odessa, TX 79762 | Oil & Gas Operator | Dec 2025 |
| 188 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 189 | Petro-Beth Oil & Gas, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2006 |
| 190 | Petrocat Innovations, LLC | Forney, TX 75126 | Oil Operator | Dec 2025 |
| 191 | Petron Energy Inc | Dallas, TX 75252 | Oil & Gas Operator | Dec 2025 |
| 192 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 193 | Plains Petroleum Operating Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
| 194 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 195 | Plumb Resources, Inc. | Houston, TX 77096 | Oil & Gas Operator | Jun 1998 |
| 196 | Polk Petroleum, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2024 |
| 197 | Pony Express Corporate Trust | Aledo, TX 76008 | Oil & Gas Operator | Dec 2025 |
| 198 | Presidio Exploration, Inc. | Englewood, CO 80155 | Oil & Gas Operator | May 1999 |
| 199 | Pryor Petroleum Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 200 | Quatro Oil And Gas, Inc. | Joshua, TX 76058 | Oil & Gas Operator | Dec 2025 |