| 201 | Reserve Exploration Co. | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2007 |
| 202 | Revilo Exploration, Inc. | Richardson, TX 75081 | Oil & Gas Operator | Jul 2021 |
| 203 | Rhoads Mark Operations | Ponca City, OK 74604 | Oil & Gas Operator | May 2006 |
| 204 | Richland Energy Corporation | Tulsa, OK 74103-4441 | Oil Operator | Jul 1995 |
| 205 | Riddle William T | Haskell, OK 74436-1353 | Oil & Gas Operator | Feb 2014 |
| 206 | Robson Resources Inc | Tulsa, OK 74104 | Oil & Gas Operator | May 1998 |
| 207 | Rocket Energy Corp | Muskogee, OK 74402-1665 | Oil & Gas Operator | Dec 2003 |
| 208 | Rocky Roads Operating LLC | Tulsa, OK 74103-4048 | Oil & Gas Operator | Jul 2025 |
| 209 | Rose Dan And Bill | Henryetta, OK 74437-1450 | Oil & Gas Operator | Jul 2025 |
| 210 | Rose Rock Resources Inc | Wagoner, OK 74467-8362 | Oil & Gas Operator | Jun 2025 |
| 211 | Rowe Energy | Beggs, OK 74421-0240 | Oil & Gas Operator | Mar 2015 |
| 212 | Rowe Stephen Oil Properties LLC | Hunt, TX 78024 | Oil & Gas Operator | Apr 2020 |
| 213 | Russell Carl G | Coweta, OK 74429 | Oil & Gas Operator | Mar 2015 |
| 214 | Russell Oil Company | Haskell, OK 74436 | Oil & Gas Operator | Apr 2014 |
| 215 | Sage Drilling Co | Wichita, KS 67202 | Oil & Gas Operator | Nov 1998 |
| 216 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 217 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 218 | Sanook Inc | Oklahoma City, OK 73156-0548 | Oil & Gas Operator | Jan 2007 |
| 219 | Scott Wayne Oil Co | Haxton, CO 80731 | Oil & Gas Operator | Apr 2020 |
| 220 | Service Drilling Co. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 1998 |
| 221 | Shallow Energy Inc | South Dennis, MA 2660 | Oil & Gas Operator | Feb 2025 |
| 222 | Shanks Drilling & Production Company LLC | Bixby, OK 74008 | Oil & Gas Operator | Jun 2025 |
| 223 | Shanks Robert "Bob" | Haskell, OK 74436-8809 | Oil & Gas Operator | Jun 2023 |
| 224 | Silverado Oil LTD | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2003 |
| 225 | Silvertin Farm Production LLC | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2020 |
| 226 | Simmons Donald M | Muskogee, OK 74401 | Oil & Gas Operator | May 2013 |
| 227 | Siosi Oil & Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2013 |
| 228 | Six "E" Trading Company | Henryetta, OK 74801 | Oil & Gas Operator | Sep 2020 |
| 229 | Skycap Energy, LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 230 | Smart Service & Equipment LLC | Muskogee, OK 74401-5262 | Oil Operator | Aug 2013 |
| 231 | Smith Vernon C | Tulsa, OK 74104 | Oil & Gas Operator | Jan 2025 |
| 232 | Snyder Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2015 |
| 233 | Southbrook Energies Inc | Tulsa, OK 74153 | Oil Operator | Feb 2004 |
| 234 | Southern Int'L Inc | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2007 |
| 235 | SP Energy Development Company | Seattle, WA 98101-3277 | Oil & Gas Operator | Mar 2015 |
| 236 | Sparkman Rodger E | Jenks, OK 74037-0267 | Oil Operator | Sep 2018 |
| 237 | Sparks Resources Inc | Bristow, OK 74010 | Oil & Gas Operator | Jul 2025 |
| 238 | Sterling Oil Of Okla Inc | Tulsa, OK 74170-2163 | Oil & Gas Operator | Nov 2006 |
| 239 | T Bar M Energy Resources LLC | Mounds, OK 74047 | Oil & Gas Operator | Jun 2025 |
| 240 | T D Energy Company Inc | Broken Arrow, OK 74011-3953 | Oil & Gas Operator | Feb 2015 |
| 241 | T W Law LLC | Muskogee, OK 74403-6736 | Oil Operator | Jun 2025 |
| 242 | Tarwater Oil & Gas LLC | San Jose, CA 95128-4219 | Oil & Gas Operator | Dec 2023 |
| 243 | Tennyson Oil & Gas | Muskogee, OK 74401 | Oil Operator | Jun 2025 |
| 244 | Texaco Expl. And Prod. Inc. | Houston, TX 77236 | Oil & Gas Operator | Jun 2025 |
| 245 | Tilford Pinson Exploration LLC | Edmond, OK 73003 | Oil & Gas Operator | Jun 2025 |
| 246 | TNT Enterprizes | Coweta, OK 74429 | Oil & Gas Operator | Nov 2005 |
| 247 | TNT Operating Company Inc | Blanchard, OK 73010 | Oil & Gas Operator | Sep 2024 |
| 248 | Tomorrows Energy Exploration Inc | Okmulgee, OK 74447 | Oil & Gas Operator | May 2025 |
| 249 | Tower Energy Corporation | Sapulpa, OK 74067-0837 | Oil & Gas Operator | Mar 2015 |
| 250 | Troyer Howard E | Tulsa, OK 74133-8016 | Oil & Gas Operator | Dec 2014 |
| 251 | Txo Production Corp. | Ganado, TX 77962 | Oil & Gas Operator | Aug 2022 |
| 252 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2025 |
| 253 | Vantage Point Operating Co | Houston, TX 77057 | Oil & Gas Operator | Dec 2014 |
| 254 | Vaughn Deloy | Beggs, OK 74421-0305 | Oil & Gas Operator | Apr 2020 |
| 255 | Wachob Jack | Sapulpa, OK 74066 | Oil Operator | Dec 2014 |
| 256 | Wadley Bill & Son Drilling Co | Okmulgee, OK 74447 | Oil & Gas Operator | Jun 2025 |
| 257 | Warner Oil Co., Inc. | Canyon, TX 79015 | Oil & Gas Operator | May 2013 |
| 258 | Wasson Billy C | Morris, OK 74445 | Oil & Gas Operator | Jun 2025 |
| 259 | Watkins J L | Henryetta, OK 74437 | Oil & Gas Operator | Jun 2025 |
| 260 | Watkins Joe L | Boynton, OK 74422 | Oil & Gas Operator | Mar 2015 |
| 261 | Watkins Paul | Bixby, OK 74008-4018 | Oil & Gas Operator | Jun 2004 |
| 262 | WFD Oil Corporation | Edmond, OK 73012 | Oil & Gas Operator | Jun 2025 |
| 263 | White Quincy | Haskell, OK 74436-8798 | Oil Operator | Apr 2020 |
| 264 | Whitley Oil & Gas Inc | Owasso, OK 74055 | Oil & Gas Operator | Jun 2009 |
| 265 | Wimberley James A | Dallas, TX 75229-6180 | Oil & Gas Operator | Nov 2014 |
| 266 | WN Operating Inc | Okmulgee, OK 74447 | Oil & Gas Operator | Jun 2025 |
| 267 | Wright Katherine E | Tulsa, OK 74114-1229 | Oil Operator | Sep 2019 |
| 268 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Jul 2025 |
| 269 | Yarhola Production Company | Drumright, OK 74030 | Oil & Gas Operator | Jun 2025 |