| 201 | Shamrock Operating Company LLC | Cleveland, OK 74020 | Oil Operator | Aug 2022 |
| 202 | Shamrock Well Operations LLC | Oklahoma City, OK 73118-4015 | Oil & Gas Operator | Jun 2026 |
| 203 | Shanks Drilling & Production Company LLC | Bixby, OK 74008 | Oil & Gas Operator | Jun 2026 |
| 204 | Shanks Robert "Bob" | Haskell, OK 74436-8809 | Oil & Gas Operator | Jun 2023 |
| 205 | Shannon Corporation Inc | Okmulgee, OK 74447-1323 | Oil & Gas Operator | Mar 2015 |
| 206 | Shannon Energy | Liberal, KS 67901 | Oil & Gas Operator | Feb 1999 |
| 207 | Shannon Petroleum Inc | Tulsa, OK 74136-4603 | Oil & Gas Operator | Oct 2016 |
| 208 | Shar Alan Oil Company | | Oil & Gas Operator | Oct 2005 |
| 209 | Sharber Billy Jack Operating | Konawa, OK 74849-0071 | Oil & Gas Operator | Mar 2015 |
| 210 | Sharber Don E | Okemah, OK 74859-0322 | Oil Operator | Dec 2018 |
| 211 | Sharber Production Inc | Konawa, OK 74849 | Oil & Gas Operator | Dec 2024 |
| 212 | Sharp Anthony G | Shawnee, OK 74802-1701 | Oil & Gas Operator | Jul 2003 |
| 213 | Shattuck SWD LLC | Shattuck, OK 73858-0848 | Oil Operator | Mar 2022 |
| 214 | Shaver Tommy L | Kingfisher, OK 73750-9612 | Oil & Gas Operator | Apr 2015 |
| 215 | Shaw Thomas P | Tulsa, OK 74105-7327 | Oil & Gas Operator | Mar 2015 |
| 216 | Shaw, T. G. Oil Company, LTD. | Fort Worth, TX 76113 | Oil & Gas Operator | Sep 2026 |
| 217 | Shawver & Son Inc | Oklahoma City, OK 73154-0778 | Oil & Gas Operator | Dec 2025 |
| 218 | Shawver Energy Inc | Oklahoma City, OK 73154-0683 | Oil & Gas Operator | Apr 2014 |
| 219 | Shebester Inc | Maysville, OK 73057 | Oil & Gas Operator | Nov 1998 |
| 220 | Sheets George M & Judith A | Tonkawa, OK 74653 | Oil & Gas Operator | May 2026 |
| 221 | Shelburne Oil Company | Oklahoma City, OK 73116-7639 | Gas Operator | Feb 2020 |
| 222 | Shell Oil Company | Houston, TX 77210 | Oil & Gas Operator | Apr 2015 |
| 223 | Shell Western Expl & Prod Inc | Houston, TX 77251 | Oil & Gas Operator | Mar 2015 |
| 224 | Shelly Energy Inc | Berwyn, PA 19312 | Oil & Gas Operator | Jun 2026 |
| 225 | Shelter Petroleum,Inc | | Oil & Gas Operator | Jun 2014 |
| 226 | Shelton Alec & Glenda | Kiefer, OK 74041 | Oil & Gas Operator | May 2026 |
| 227 | Shelton Brothers | Okmulgee, OK 74447-6110 | Oil & Gas Operator | Apr 2020 |
| 228 | Shelton Dempsey L | Glenpool, OK 74033 | Oil & Gas Operator | Dec 2018 |
| 229 | Shelton Dempsey W | Tulsa, OK 74119-4036 | Oil & Gas Operator | Mar 2015 |
| 230 | Shelton Oil Company LLC | Collinsville, OK 74021-5619 | Oil Operator | May 2026 |
| 231 | Shelton Oil Resources LLC | Tulsa, OK 74107-4874 | Oil & Gas Operator | Apr 2026 |
| 232 | Shelton Resources Inc | Tulsa, OK 74119-4036 | Oil & Gas Operator | Feb 2008 |
| 233 | Shepard James | Beggs, OK 74421 | Oil & Gas Operator | Feb 2024 |
| 234 | Sheppard Pool Operating LLC | Morris, OK 74445 | Oil & Gas Operator | May 2026 |
| 235 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | May 2026 |
| 236 | Sherman Larry Oil Company | Chandler, OK 74834 | Oil & Gas Operator | Mar 2015 |
| 237 | Sherman Oil & Gas Co Inc | Chandler, OK 74834-0571 | Oil & Gas Operator | Apr 2020 |
| 238 | Sherman Oil & Gas, L.L.C. | Chandler, OK 74834 | Oil & Gas Operator | May 2026 |
| 239 | Sherrill Bob G | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2015 |
| 240 | Sherry'S Oil Company | Terral, OK 73569 | Oil Operator | Oct 2000 |
| 241 | Shertzer Charles F | Kilgore, TX 75662 | Oil Operator | Nov 2005 |
| 242 | Shideler Enterprises Inc | Drumright, OK 74030 | Oil & Gas Operator | Feb 2019 |
| 243 | Shidler Well Service | Vinita, OK 74301-5468 | Oil Operator | Dec 2000 |
| 244 | Shield Operating Co. | Georgetown, TX 78627 | Oil & Gas Operator | Aug 2003 |
| 245 | Shields Cooper | Bonita Springs, FL 34135-3421 | Oil & Gas Operator | Jan 2011 |
| 246 | Shields Energy Inc | Fort Smith, AR 72901-4607 | Oil & Gas Operator | May 2026 |
| 247 | Shields Operating Inc | Fort Smith, AR 72901-3834 | Oil & Gas Operator | Oct 2021 |
| 248 | Shields VIrginia | Kellyville, OK 74039 | Oil & Gas Operator | Jun 2026 |
| 249 | Shields Well Service Corp | Stroud, OK 74079-3410 | Oil & Gas Operator | Dec 2017 |
| 250 | Shipman James E Dba Lazy J Oil Co | Hallett, OK 74034 | Oil Operator | May 2026 |
| 251 | Sho-Bar Energy Inc | Harper, KS 67058 | Oil & Gas Operator | Apr 2026 |
| 252 | Shockley Jimmie D | Morris, OK 74445-2754 | Oil Operator | May 2026 |
| 253 | Shoreline Operating LLC | Oklahoma City, OK 73113 | Oil & Gas Operator | May 2026 |
| 254 | Short Oil Co. | Luling, TX 78648 | Oil & Gas Operator | May 2026 |
| 255 | Short W D Oil Company LLC | Oxford, KS 67119-0729 | Oil Operator | May 2026 |
| 256 | Short W D Revocable Trust | Oxford, KS 67119-0729 | Oil & Gas Operator | Mar 2015 |
| 257 | Shortgrass Petroleum Inc | Follett, TX 79034 | Oil & Gas Operator | May 2026 |
| 258 | Shoshone Oil And Gas Inc | Lindsay, OK 73052-0217 | Oil & Gas Operator | Jan 2020 |
| 259 | Shriver Earl J | Lawton, OK 73507-5851 | Oil & Gas Operator | Aug 2013 |
| 260 | Shriver Operating LLC | Lawton, OK 73507-5851 | Oil & Gas Operator | Apr 2026 |
| 261 | Sicko Jaquetta Len | Muldoon, TX 78949 | Oil Operator | May 2026 |
| 262 | Sidwell Oil & Gas, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2014 |
| 263 | Siegfried R H Inc | Tulsa, OK 74104 | Oil & Gas Operator | Mar 2008 |
| 264 | Sierra Resources, Inc. | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2026 |
| 265 | Signal Hill Expl & Pet Inc | Duncan, OK 73533 | Oil & Gas Operator | Mar 2015 |
| 266 | Signature Exploration Inc. | Shawnee, OK 74804-4130 | Oil & Gas Operator | Mar 2015 |
| 267 | Sikes Oil Company Inc | Velma, OK 73091-0759 | Oil & Gas Operator | Jan 2014 |
| 268 | Silberman A & M Oil | Oklahoma City, OK 73122-3096 | Oil & Gas Operator | Apr 2014 |
| 269 | Silent Stone Energy LLC | | Oil & Gas Operator | May 2026 |
| 270 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Sep 2026 |
| 271 | Silver Eagle Oil Company | Ada, OK 74820 | Oil Operator | Dec 2004 |
| 272 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | Jun 2026 |
| 273 | Silver Star Of Nevada Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | May 2026 |
| 274 | Silver Star Production Co | Moore, OK 73160-6202 | Oil & Gas Operator | Jun 2026 |
| 275 | Silverado Oil LTD | Ardmore, OK 73401 | Oil & Gas Operator | Jun 2003 |
| 276 | Silverridge Corp | Van Buren, AR 72956 | Oil & Gas Operator | Mar 2015 |
| 277 | Silvertin Farm Production LLC | Poteau, OK 74953 | Oil & Gas Operator | Apr 2020 |
| 278 | Simasko Production Co | Denver, CO 80204 | Oil & Gas Operator | Nov 1997 |
| 279 | Simco Operating | Shawnee, OK 74804-2501 | Oil Operator | Jan 2013 |
| 280 | Simcoe Oil Company | Scottsdale, AZ 85258-2553 | Oil & Gas Operator | May 2020 |
| 281 | Simmons Donald M | Muskogee, OK 74401 | Oil & Gas Operator | May 2013 |
| 282 | Simmons Evelyn B-Per Represent | Edmond, OK 73083-3610 | Oil & Gas Operator | Aug 1996 |
| 283 | Simmons Mack McCoy | Cement, OK 73017 | Oil Operator | Jun 2026 |
| 284 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 285 | Simon Joseph W | Carney, OK 74832-0443 | Oil & Gas Operator | Dec 2016 |
| 286 | Simon Oil Company | Ardmore, OK 73401 | Oil Operator | May 2026 |
| 287 | Simon Royce & Joyce | Tecumseh, OK 74873-7341 | Oil Operator | Jun 2018 |
| 288 | Simpson Oil & Land Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 289 | Sinclair Oil & Gas Company | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Sep 2026 |
| 290 | Singer Joseph B Expl Co | Oklahoma City, OK 73118-7486 | Oil & Gas Operator | Mar 1993 |
| 291 | Singer Oil Co LLC | Hennessey, OK 73742 | Oil & Gas Operator | Jun 2026 |
| 292 | Singer Oil Company | Oklahoma City, OK 73148 | Oil & Gas Operator | Apr 2026 |
| 293 | Singer-Fleischaker Oil Op Co | Oklahoma City, OK 73102 | Oil & Gas Operator | Apr 2002 |
| 294 | Siosi Oil & Gas Company | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2013 |
| 295 | Sitco Inc | Yukon, OK 73099 | Oil & Gas Operator | Jul 1995 |
| 296 | Six "E" Trading Company | Henryetta, OK 74801 | Oil & Gas Operator | Sep 2020 |
| 297 | SJ Ok Oil Company | Dallas, TX 75206-9925 | Oil & Gas Operator | Oct 2025 |
| 298 | SJM Inc | Tulsa, OK 74133-1757 | Gas Operator | Apr 2006 |
| 299 | Sju Holdings LLC | Norman, OK 73072 | Oil & Gas Operator | May 2026 |
| 300 | SK Nemaha LLC | Houston, TX 77079-1222 | Oil & Gas Operator | Feb 2021 |