| 101 | Ratex Resources Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | May 2000 |
| 102 | Ratliff City Trucking Inc | Ratliff City, OK 73481-9603 | Oil & Gas Operator | Feb 2018 |
| 103 | Ratliff Operating Corp. | Amarillo, TX 79105 | Oil & Gas Operator | Jul 2026 |
| 104 | Ratts, Robert V. Inc. | Bedford, TX 76021 | Oil & Gas Operator | Aug 2003 |
| 105 | Raven Resources LLC | Oklahoma City, OK 73172 | Oil & Gas Operator | Apr 2026 |
| 106 | Ravil Inc | Edmond, OK 73013 | Gas Operator | Nov 1998 |
| 107 | Raw Crude Oil & Gas, L.L.C. | Norman, OK 73069 | Oil & Gas Operator | Apr 2026 |
| 108 | Raw Production LLC | Lindsay, OK 73052 | Oil & Gas Operator | Apr 2026 |
| 109 | Rawhide Oil Company | | Oil & Gas Operator | Sep 2011 |
| 110 | Rawhide Operating, Inc. | New Braunfels, TX 78131 | Oil & Gas Operator | Jul 2026 |
| 111 | Ray G H Oil Company | Chickasha, OK 73023-0650 | Oil Operator | Feb 2010 |
| 112 | Ray Herman | Haskell, OK 74436-0446 | Oil & Gas Operator | Dec 2021 |
| 113 | Ray Joe T | Wanette, OK 74878 | Oil Operator | Apr 2026 |
| 114 | Ray Randy S | Okmulgee, OK 74447-8534 | Oil & Gas Operator | Apr 2015 |
| 115 | Ray Roger T | Boynton, OK 74422 | Oil & Gas Operator | Dec 2021 |
| 116 | Ray'S Oil Company | Boynton, OK 74422 | Oil & Gas Operator | Apr 2026 |
| 117 | Raydon Exploration, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2026 |
| 118 | Raydon Production Company | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 1992 |
| 119 | Raye Oil Company | Velma, OK 73491-0482 | Oil & Gas Operator | Oct 2012 |
| 120 | Rayland Operating LLC | Moro, IL 62067 | Oil Operator | Jun 2023 |
| 121 | Rays Energy Partners LLC | Dallas, TX 75230 | Oil & Gas Operator | Apr 2026 |
| 122 | RB Operating Company | Shawnee, OK 74802-1488 | Oil & Gas Operator | Apr 2015 |
| 123 | RBC Exploration Company | Tulsa, OK 74114 | Oil & Gas Operator | May 2013 |
| 124 | RCK Oil And Gas LLC | Denton, TX 76207 | Oil & Gas Operator | May 2026 |
| 125 | RDH Enterprises Inc | El Reno, OK 73036 | Oil & Gas Operator | May 2015 |
| 126 | Reach Oil And Gas Company Inc | Oklahoma City, OK 73118-1100 | Oil & Gas Operator | Apr 2026 |
| 127 | Reading & Bates Petroleum Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2009 |
| 128 | Reagan Production Inc | Terral, OK 73569 | Oil Operator | May 2026 |
| 129 | Real Production Management LLC | Tulsa, OK 74103 | Oil Operator | Oct 2025 |
| 130 | Reames Jr Keith E | Duncan, OK 73534-0246 | Oil & Gas Operator | Jul 1999 |
| 131 | Rebel Oil Company | Keaton, KY 41226 | Oil & Gas Operator | Jan 2025 |
| 132 | Rebellion Energy LLC | Tulsa, OK 74135-6241 | Oil & Gas Operator | Jun 2022 |
| 133 | Red Bluff Resources Operating LLC | Oklahoma City, OK 73112-5468 | Oil & Gas Operator | Apr 2026 |
| 134 | Red Buck Oil Company | Copan, OK 74022-0215 | Oil Operator | Nov 2009 |
| 135 | Red Dirt Environmental Services LLC | Checotah, OK 74426 | Oil & Gas Operator | Mar 2026 |
| 136 | Red Eagle Oil Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2005 |
| 137 | Red Earth Oil & Gas, Inc. | Oklahoma City, OK 73159 | Oil & Gas Operator | Oct 2021 |
| 138 | Red Fork (USA) Investments Inc | Midland, TX 79710-0272 | Oil & Gas Operator | May 2019 |
| 139 | Red Fork Oil Co | Lakewood, CO 80215 | Oil & Gas Operator | Aug 1993 |
| 140 | Red Fork Oil Production Inc | Mannford, OK 74044-0492 | Oil & Gas Operator | Feb 2017 |
| 141 | Red Fork Production, LLC | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2026 |
| 142 | Red Fork Valley Oil & Gas Co | Cushing, OK 74023 | Oil Operator | Dec 2014 |
| 143 | Red Hawk Disposal LLC | Oklahoma City, OK 73172 | Oil Operator | Jun 2023 |
| 144 | Red Hawk Resources Inc | Edmond, OK 73003-3207 | Oil & Gas Operator | May 2026 |
| 145 | Red Mountain Operating LLC | Oklahoma City, OK 73118-1253 | Oil & Gas Operator | Apr 2024 |
| 146 | Red Ox Resources LLC | Dumas, TX 79029 | Gas Operator | Apr 2026 |
| 147 | Red Plains Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Oct 2017 |
| 148 | Red River Fuels Inc | Bristow, OK 74010-2231 | Oil & Gas Operator | Mar 2008 |
| 149 | Red River Oil & Gas Company | Oklahoma City, OK 73132-5120 | Oil & Gas Operator | Mar 2015 |
| 150 | Red River Oil Corporation | Alvarado, TX 76009-0449 | Oil & Gas Operator | Dec 2016 |
| 151 | Red River Petroleum Inc | Tipton, OK 73570 | Oil Operator | Apr 2026 |
| 152 | Red Rock Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Mar 2015 |
| 153 | Red Rock Resources, L.L.C. | Wichita Falls, TX 76310 | Oil & Gas Operator | Apr 2026 |
| 154 | Red Rocks Oil & Gas Operating LLC | Oklahoma City, OK 73103 | Oil & Gas Operator | May 2026 |
| 155 | Red Sand Resources LLC | Ada, OK 74821 | Oil Operator | Apr 2026 |
| 156 | Red Stone Resources LLC | Edmond, OK 73013 | Oil Operator | Jun 2023 |
| 157 | Red Tail Properties, LLC | Tulsa, OK 74107-3443 | Oil Operator | Apr 2026 |
| 158 | Red Wolf Operating LLC | Edmond, OK 73003-2179 | Oil & Gas Operator | May 2026 |
| 159 | Redbird Oil Company | Bartlesville, OK 74005-2566 | Oil & Gas Operator | Mar 2015 |
| 160 | Redbud E & P, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Jul 2026 |
| 161 | Redbud Oil & Gas | Nowata, OK 74048-0026 | Oil & Gas Operator | Dec 2000 |
| 162 | Redbud Oil Company | Elmore City, OK 73433-8637 | Oil Operator | Apr 2026 |
| 163 | Reddy Oil & Gas Corporation | Tulsa, OK 74108 | Oil & Gas Operator | Apr 2026 |
| 164 | Redfork Operations LLC | Dover, OK 73734 | Oil & Gas Operator | May 2026 |
| 165 | Redgate Petroleum Inc | Waynoka, OK 73860-9408 | Oil & Gas Operator | Mar 2014 |
| 166 | Redhen Oil Company | Oklahoma City, OK 73135 | Oil & Gas Operator | Sep 2024 |
| 167 | Redhill Operating LLC | Duncan, OK 73533 | Oil & Gas Operator | Apr 2026 |
| 168 | Redland Development LLC | Cashion, OK 73016-9625 | Oil & Gas Operator | May 2019 |
| 169 | Redland Resources LLC | Oklahoma City, OK 73127 | Oil & Gas Operator | May 2026 |
| 170 | Redline Energy LLC | Dover, OK 73734 | Oil & Gas Operator | May 2026 |
| 171 | Redneck Oil & Gas LLC | Cushing, OK 74023 | Oil Operator | Apr 2026 |
| 172 | Redstone Oil & Gas Company | Dallas, TX 75225 | Oil & Gas Operator | Jan 2020 |
| 173 | Redtail Investments LLC | Oklahoma City, OK 73179 | Oil & Gas Operator | May 2026 |
| 174 | Redwine Resources Inc | Dallas, TX 75225 | Oil & Gas Operator | Feb 2015 |
| 175 | Reed Power Tongs Inc | Seminole, OK 74818 | Oil & Gas Operator | Apr 2026 |
| 176 | Reed Richard L | Shawnee, OK 74802-1462 | Oil Operator | Nov 1993 |
| 177 | Reeder Energy Operating LLC | Dallas, TX 75206-4085 | Oil & Gas Operator | Dec 2021 |
| 178 | Reeves Harold D | | Oil & Gas Operator | Apr 1992 |
| 179 | Regal Petroleum Services Inc | Euless, TX 76039-1127 | Oil & Gas Operator | May 2015 |
| 180 | Regency Exploration Inc | Oklahoma City, OK 73102-5605 | Oil & Gas Operator | Mar 1999 |
| 181 | Regency Petroleum Inc | Jones, OK 73049-8724 | Oil & Gas Operator | Mar 1999 |
| 182 | Regional Energy Corporation | Temple, TX 76503-1733 | Oil Operator | Mar 1996 |
| 183 | Reid Williams Operating Inc | Shreveport, LA 71106-6223 | Oil & Gas Operator | Apr 2026 |
| 184 | Reign Operating LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | May 2026 |
| 185 | Reliable Oil Industries Inc | Tulsa, OK 74133 | Oil & Gas Operator | Jul 2024 |
| 186 | Reliance Trusts | Dallas, TX 75244 | Oil & Gas Operator | Nov 1995 |
| 187 | Relm Energy Inc | Morris, OK 74445-2227 | Oil & Gas Operator | Feb 2021 |
| 188 | Remco Energy Corporation | Independence, MO 64055 | Oil & Gas Operator | Nov 2009 |
| 189 | Remnant Energy, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jul 2026 |
| 190 | Remo Production Co | Stillwater, OK 74074-9333 | Oil Operator | Apr 2014 |
| 191 | Remora Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Jul 2026 |
| 192 | Renaissance Petroleum Co LLC | Houston, TX 77058 | Oil & Gas Operator | Nov 2011 |
| 193 | Rence Guy A | | Oil Operator | Jan 2013 |
| 194 | Renco Energy Inc | Calgary, AB T2H 0H6 | Oil & Gas Operator | Mar 2026 |
| 195 | Renegade Oil And Gas LLC | Helena, OK 73741-0162 | Oil & Gas Operator | Dec 2019 |
| 196 | Renegade Operating Company | Aurora, CO 80016 | Oil & Gas Operator | Aug 2023 |
| 197 | Renfroe Lyndol | Wilson, OK 73463-6631 | Oil Operator | May 2020 |
| 198 | Reno Resources Inc | Boynton, OK 74422-9762 | Oil & Gas Operator | May 2015 |
| 199 | Rensark Energy Company Inc | Oklahoma City, OK 73105-5208 | Oil & Gas Operator | Apr 2015 |
| 200 | Reo Resources Inc | | Oil & Gas Operator | Apr 2018 |