| 201 | Settlers Corporation | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2000 |
| 202 | Settlers Energy Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Apr 1998 |
| 203 | Seven Horses LLC | Alva, OK 73717-5004 | Oil & Gas Operator | Feb 2025 |
| 204 | Seven J Oil Inc | Jenning, OK 74038-9729 | Oil & Gas Operator | Jan 2025 |
| 205 | Seventh Corporation The | Oklahoma City, OK 73107 | Oil & Gas Operator | May 2006 |
| 206 | Seventy-One Inc | | Oil & Gas Operator | May 1999 |
| 207 | Sevitski & Associates Inc | Pryor, OK 74361 | Oil & Gas Operator | Dec 2000 |
| 208 | Seymour Oil Co., Inc. | Edmond, OK 73025 | Oil & Gas Operator | Jul 2011 |
| 209 | Shadow-Del Oil Company | Kiefer, OK 74041-0453 | Oil & Gas Operator | Jul 2015 |
| 210 | Shadowpeak Operating LLC | Oklahoma City, OK 73159-6905 | Oil & Gas Operator | Jan 2025 |
| 211 | Shakespeare Oil Co Inc | Salem, IL 62881 | Oil & Gas Operator | Feb 2025 |
| 212 | Shale Properties LLC | Kingfisher, OK 73750 | Oil Operator | Aug 2023 |
| 213 | Shallow Energy Inc | South Dennis, MA 2660 | Oil & Gas Operator | Apr 2024 |
| 214 | Shamrock Operating Company LLC | Cleveland, OK 74020 | Oil Operator | Aug 2022 |
| 215 | Shamrock Well Operations LLC | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Feb 2025 |
| 216 | Shanks Drilling & Production Company LLC | Bixby, OK 74008 | Oil & Gas Operator | Jan 2025 |
| 217 | Shanks Robert "Bob" | Haskell, OK 74436-8809 | Oil & Gas Operator | Jun 2023 |
| 218 | Shannon Corporation Inc | Okmulgee, OK 74447-1323 | Oil & Gas Operator | Mar 2015 |
| 219 | Shannon Energy | Liberal, KS 67901 | Oil & Gas Operator | Feb 1999 |
| 220 | Shannon Petroleum Inc | Tulsa, OK 74136-4603 | Oil & Gas Operator | Oct 2016 |
| 221 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 222 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 223 | Sharber Don E | Okemah, OK 74859-0322 | Oil Operator | Dec 2018 |
| 224 | Sharber Production Inc | Konawa, OK 74849 | Oil & Gas Operator | Dec 2024 |
| 225 | Sharon Oil Company Inc | | Oil Operator | Aug 1997 |
| 226 | Sharp Anthony G | Shawnee, OK 74802-1701 | Oil & Gas Operator | Jul 2003 |
| 227 | Shattuck SWD LLC | Shattuck, OK 73858-0848 | Oil Operator | Mar 2022 |
| 228 | Shaver Tommy L | Kingfisher, OK 73750-9612 | Oil & Gas Operator | Apr 2015 |
| 229 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 230 | Shaw, T. G. Oil Company, LTD. | Fort Worth, TX 76113 | Oil & Gas Operator | Apr 2025 |
| 231 | Shawver & Son Inc | Oklahoma City, OK 73154-0778 | Oil & Gas Operator | Oct 2024 |
| 232 | Shawver Energy Inc | Oklahoma City, OK 73154-0683 | Oil & Gas Operator | Apr 2014 |
| 233 | Shebester Inc | Maysville, OK 73057 | Oil & Gas Operator | Nov 1998 |
| 234 | Sheets George M & Judith A | Tonkawa, OK 74653 | Oil & Gas Operator | Jan 2025 |
| 235 | Shelburne Oil Company | Oklahoma City, OK 73116-7639 | Gas Operator | Feb 2020 |
| 236 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Jan 2025 |
| 237 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 238 | Shelly Energy Inc. | Berwyn, PA 19312 | Oil & Gas Operator | Feb 2025 |
| 239 | Shelter Petroleum,Inc | | Oil & Gas Operator | Jun 2014 |
| 240 | Shelton Alec & Glenda | Kiefer, OK 74041 | Oil & Gas Operator | Jan 2025 |
| 241 | Shelton Brothers | Okmulgee, OK 74447-6110 | Oil & Gas Operator | Apr 2020 |
| 242 | Shelton Dempsey L | Glenpool, OK 74033 | Oil & Gas Operator | Dec 2018 |
| 243 | Shelton Dempsey W | Tulsa, OK 74119-4036 | Oil & Gas Operator | Mar 2015 |
| 244 | Shelton Oil Company LLC | Collinsville, OK 74021-5619 | Oil Operator | Jan 2025 |
| 245 | Shelton Oil Resources LLC | Tulsa, OK 74107-4874 | Oil & Gas Operator | Jan 2025 |
| 246 | Shelton Resources Inc | Tulsa, OK 74119-4036 | Oil & Gas Operator | Feb 2008 |
| 247 | Shepard James | Beggs, OK 74421 | Oil & Gas Operator | Feb 2024 |
| 248 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Jan 2025 |
| 249 | Sherman Larry Oil Company | Chandler, OK 74834 | Oil & Gas Operator | Mar 2015 |
| 250 | Sherman Oil & Gas Co Inc | Chandler, OK 74834-0571 | Oil & Gas Operator | Apr 2020 |
| 251 | Sherman Oil & Gas LLC | Chandler, OK 74834 | Oil & Gas Operator | Jan 2025 |
| 252 | Sherrill Bob G | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2015 |
| 253 | Sherry'S Oil Company | Terral, OK 73569 | Oil Operator | Oct 2000 |
| 254 | Shertzer Charles F | Kilgore, TX 75662 | Oil Operator | Nov 2005 |
| 255 | Shideler Enterprises Inc | Drumright, OK 74030-1233 | Oil & Gas Operator | Feb 2019 |
| 256 | Shidler Well Service | Vinita, OK 74301-5468 | Oil Operator | Dec 2000 |
| 257 | Shield Operating Co. | Georgetown, TX 78627 | Oil & Gas Operator | Aug 2003 |
| 258 | Shields Cooper | Bonita Springs, FL 34135-3421 | Oil & Gas Operator | Jan 2011 |
| 259 | Shields Energy Inc | Fort Smith, AR 72901-4607 | Oil & Gas Operator | Jan 2025 |
| 260 | Shields Operating Inc | Fort Smith, AR 72901-3834 | Oil & Gas Operator | Oct 2021 |
| 261 | Shields VIrginia | Kellyville, OK 74039 | Oil & Gas Operator | Jan 2025 |
| 262 | Shields Well Service Corp | Stroud, OK 74079-3410 | Oil & Gas Operator | Dec 2017 |
| 263 | Shipman James E Dba Lazy J Oil Co | Hallett, OK 74034 | Oil Operator | Jan 2025 |
| 264 | Sho-Bar Energy, Inc. | Harper, KS 67058 | Oil & Gas Operator | Dec 2024 |
| 265 | Shockley Jimmie D | Morris, OK 74445-2754 | Oil Operator | Jan 2025 |
| 266 | Shofner Oil Company | Chushing,, OK 74023 | Oil & Gas Operator | Feb 2003 |
| 267 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | Jan 2025 |
| 268 | Short Oil Co | Luling, TX 78648 | Oil & Gas Operator | Jan 2025 |
| 269 | Short W D Oil Company LLC | Oxford, KS 67119-0729 | Oil Operator | Jan 2025 |
| 270 | Short W D Revocable Trust | Oxford, KS 67119-0729 | Oil & Gas Operator | Mar 2015 |
| 271 | Shortgrass Petroleum Inc | Laverne, OK 73848-0139 | Oil & Gas Operator | Jan 2025 |
| 272 | Shoshone Oil And Gas Inc | Lindsay, OK 73052-0217 | Oil & Gas Operator | Jan 2020 |
| 273 | Shriver Earl J | Lawton, OK 73507-5851 | Oil & Gas Operator | Aug 2013 |
| 274 | Shriver Operating LLC | Lawton, OK 73507-5851 | Oil & Gas Operator | Jan 2025 |
| 275 | Sicko Jaquetta Len | Muldoon, TX 78949 | Oil Operator | Nov 2024 |
| 276 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 277 | Siegfried R H Inc | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2008 |
| 278 | Sierra Resources, Inc. | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2024 |
| 279 | Signal Hill Expl & Pet Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 280 | Signature Exploration Inc. | Shawnee, OK 74804-4130 | Oil & Gas Operator | Mar 2015 |
| 281 | Sikes Oil Company Inc | Velma, OK 73091-0759 | Oil & Gas Operator | Jan 2014 |
| 282 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 283 | Silent Stone Energy LLC | Barnsdal, OK 74002 | Oil & Gas Operator | Jan 2025 |
| 284 | Sills Oil Co | Osage, OK 74054 | Oil Operator | Dec 2024 |
| 285 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Apr 2025 |
| 286 | Silver Eagle Oil Company | Ada, OK 74820 | Oil Operator | Dec 2004 |
| 287 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Jan 2025 |
| 288 | Silver Star Of Nevada Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Jan 2025 |
| 289 | Silver Star Production Co | Moore, OK 73160-6202 | Oil & Gas Operator | Oct 2024 |
| 290 | Silverado Oil LTD | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2003 |
| 291 | Silverridge Corp | Van Buren, AR 72956 | Oil & Gas Operator | Mar 2015 |
| 292 | Silvertin Farm Production LLC | Tulsa, OK 74137 | Oil & Gas Operator | Apr 2020 |
| 293 | Simasko Production Co | Denver, CO 80204 | Oil & Gas Operator | Nov 1997 |
| 294 | Simco Operating | Shawnee, OK 74804-2501 | Oil Operator | Jan 2013 |
| 295 | Simcoe Oil Company | Scottsdale, AZ 85258-2553 | Oil & Gas Operator | May 2020 |
| 296 | Simmons Donald M | Muskogee, OK 74401 | Oil & Gas Operator | May 2013 |
| 297 | Simmons Evelyn B-Per Represent | Edmond, OK 73083-3610 | Oil & Gas Operator | Aug 1996 |
| 298 | Simmons Mack McCoy | Cement, OK 73017 | Oil Operator | Feb 2025 |
| 299 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 300 | Simon Joseph W | Carney, OK 74832-0443 | Oil & Gas Operator | Dec 2016 |