| 101 | Ofs-Tulsa Corporation | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 1997 |
| 102 | Oilco Energy Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 103 | Oklahoma Liquid Resources Inc | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2025 |
| 104 | Oktex Operating LLC | Edmond, OK 73013-1961 | Oil & Gas Operator | May 2020 |
| 105 | Oneok Resources Company | Tulsa, OK 74102 | Oil & Gas Operator | Feb 2017 |
| 106 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 107 | Patina Oklahoma Corp | Duncan, OK 73533-9523 | Oil & Gas Operator | Nov 2014 |
| 108 | Petro Oilfield Equipment Inc | Drumright, OK 74030-1233 | Oil & Gas Operator | Dec 2010 |
| 109 | Petro Warrior LLC | Wichita, KS 67206 | Oil & Gas Operator | Jan 2026 |
| 110 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 111 | Phoenix Production Inc | Burneyville, OK 73430-2158 | Oil & Gas Operator | Feb 2025 |
| 112 | Positive Energy LLC | Ada, OK 74820 | Oil & Gas Operator | Jan 2026 |
| 113 | Powell Oil | Healdton, OK 73438-4463 | Oil & Gas Operator | Jan 2026 |
| 114 | Power Fuel Producers Inc | Keller, TX 76244-1059 | Oil & Gas Operator | Sep 2001 |
| 115 | R & H LLC | Ardmore, OK 73401-6329 | Oil & Gas Operator | Mar 2015 |
| 116 | Ra-Jac LLC | Norman, OK 73069 | Oil & Gas Operator | Feb 2026 |
| 117 | Reagan Production Inc | Terral, OK 73569 | Oil Operator | Nov 2025 |
| 118 | Reid Williams Operating Inc | Shreveport, LA 71106-6223 | Oil & Gas Operator | Jan 2026 |
| 119 | Riley Lee Roy | Chickasha, OK 73018-9306 | Oil & Gas Operator | May 2006 |
| 120 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 121 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 122 | Sanquip LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Feb 2026 |
| 123 | Scana Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 124 | Scana Petroleum Resources Inc | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 125 | Seals And Brown Oil Operating | Norman, OK 73072-3020 | Oil & Gas Operator | Sep 2024 |
| 126 | Seals Oil Company | Fox, OK 73435-0222 | Oil & Gas Operator | Nov 2011 |
| 127 | Seay Dennis Regan | | Oil Operator | Jan 2001 |
| 128 | Sherry'S Oil Company | Terral, OK 73569 | Oil Operator | Oct 2000 |
| 129 | Signal Hill Expl & Pet Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 130 | Skeet Oil Production LLC | Grady, OK 73569 | Oil Operator | Dec 2025 |
| 131 | Smart Jr T J | Ryan, OK 73565 | Oil Operator | Sep 1994 |
| 132 | Smith Oil And Gas Co | Wichita Falls, TX 76310 | Oil Operator | Dec 2010 |
| 133 | Southerland Marquieta Dba Keta Oil Company | Loco, OK 73442 | Oil & Gas Operator | Jan 2026 |
| 134 | Southern Oklahoma Production | Wilson, OK 73463-6537 | Oil & Gas Operator | Jan 2026 |
| 135 | SRW Operating LLC | Duncan, OK 73534-2087 | Oil & Gas Operator | Sep 2014 |
| 136 | State Oil Company | | Oil & Gas Operator | Mar 2006 |
| 137 | Sullivan Wesley L | Duncan, OK 73533 | Oil & Gas Operator | Mar 2002 |
| 138 | Sweetwater Exploration LLC | Norman, OK 73069-5636 | Oil & Gas Operator | Jan 2026 |
| 139 | SWN Production LLC | Spring, TX 77389-4954 | Oil & Gas Operator | Feb 2022 |
| 140 | Tat, Inc. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2023 |
| 141 | TC Oil LLC | Duncan, OK 73533 | Oil Operator | Dec 2025 |
| 142 | Tcina Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2023 |
| 143 | Texaco Exploration & Prod Inc | Houston, TX 77236 | Oil & Gas Operator | Dec 2025 |
| 144 | Texaco Inc | Kingfisher, OK 73750 | Oil & Gas Operator | Dec 2017 |
| 145 | Tindol Jr Robert | Ryan, OK 73565 | Oil Operator | Oct 2009 |
| 146 | Tola Production Company | Dallas, TX 75367 | Oil & Gas Operator | Apr 2026 |
| 147 | Tonner Petroleum LLC | Dallas, TX 75248-3326 | Oil Operator | Feb 2011 |
| 148 | Triad Energy, Inc. | Oklahoma City, OK 73105-1401 | Oil & Gas Operator | Feb 2026 |
| 149 | Trio Consulting & Management,LLC | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2026 |
| 150 | Trio Operating Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2006 |
| 151 | Triple G Well Service, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2026 |
| 152 | Triple S Drilling Company | Leonard, OK 74043 | Oil & Gas Operator | Feb 2012 |
| 153 | Tripledee Drilling Co Inc | Ardmore, OK 73402-1888 | Oil & Gas Operator | Dec 2015 |
| 154 | Truluck Enterprises LLC | Wichita Falls, TX 76308-4454 | Oil & Gas Operator | Apr 2015 |
| 155 | Umc Petroleum Corporation | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 156 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2026 |
| 157 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Feb 2026 |
| 158 | Vitol Inc. | Houston, TX 77098 | Oil & Gas Operator | Sep 2023 |
| 159 | W F D Oil Corp. | Edmond, OK 73012 | Oil & Gas Operator | Jan 2026 |
| 160 | Walker Keith F | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2019 |
| 161 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Apr 2026 |
| 162 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Feb 2026 |
| 163 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2026 |
| 164 | Whitco Operating Company | Duncan, OK 73534-1936 | Oil & Gas Operator | Oct 2009 |
| 165 | Wible Limited Liability Co | Edmond, OK 73012 | Oil Operator | Oct 2024 |
| 166 | Wilcoxson Brothers | Terral, OK 73569 | Oil Operator | Mar 2008 |
| 167 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Apr 2026 |
| 168 | Williams Reid Oil Co | Dallas, TX 75234 | Oil & Gas Operator | Jan 2026 |
| 169 | Williford Energy Company | Tulsa, OK 74135 | Oil & Gas Operator | Apr 2026 |
| 170 | Williford Resources LLC | Tulsa, OK 74136-1020 | Oil & Gas Operator | Feb 2026 |
| 171 | Wilson Charles R | Durant, OK 74701 | Oil Operator | Sep 2025 |
| 172 | Wilson Claude | Loco, OK 73442-9404 | Oil & Gas Operator | Jan 2026 |
| 173 | Wilson Well Service | Loco, OK 73442-0114 | Oil & Gas Operator | Mar 2018 |
| 174 | Wonee Oil Company | Healdton, OK 73438 | Oil Operator | Jul 1996 |
| 175 | Yarhola Production Company | Drumright, OK 74030 | Oil & Gas Operator | Feb 2026 |