Oil & Gas Companies in Kansas
| Company Name | Company Location | Company Type | Most Recent Production |
| 401 | Suerte Oil & Gas LLC | Caney, KS 67333 | Oil Operator | Sep 2025 |
| 402 | Suerte Oil Compa | | Oil & Gas Operator | Oct 1995 |
| 403 | Suerte Oil Company | Howard, KS 67349 | Oil & Gas Operator | Jan 2017 |
| 404 | Sujen Enterprise | | Oil Operator | Sep 1989 |
| 405 | Sullivan & Co. | Tulsa, OK 74114 | Oil & Gas Operator | May 2022 |
| 406 | Sullivan And Company LLC | Tulsa, OK 74119 | Oil & Gas Operator | Nov 2025 |
| 407 | Summer Sun Gas | | Gas Operator | Mar 1990 |
| 408 | Summer Sun Gas, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Dec 2014 |
| 409 | Summit Operating LLC | Boulder, CO 80301 | Oil & Gas Operator | Nov 2025 |
| 410 | Summitt Energy, LLC | Wichita, KS 67218 | Oil Operator | Sep 2025 |
| 411 | Sun Oil Company | Dallas, TX 75373 | Oil & Gas Operator | Dec 2021 |
| 412 | Sun Ventures | Bartlesville, OK 74003 | Oil Operator | Feb 1997 |
| 413 | Sunardo Energy, Inc. | Castle Rock, CO 80104 | Oil Operator | Jan 1997 |
| 414 | Sunburst Explora | | Oil Operator | May 1990 |
| 415 | Sundance Oil & Gas, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Mar 2012 |
| 416 | Sundance Oil, Inc. | Norfolk, NE 68702 | Oil Operator | Aug 1998 |
| 417 | Sundgren, Stephen E. And Jackie | Rosalia, KS 67132 | Oil Operator | Jun 2023 |
| 418 | Sundown Energy, Inc. | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 419 | Sunfire Energy | | Oil & Gas Operator | Sep 2025 |
| 420 | Sunflower Energy, LLC | Overland Park, KS 66210 | Oil Operator | Dec 2019 |
| 421 | Sunflower Exploration, LLC | Overland Park, KS 66210 | Gas Operator | Sep 2025 |
| 422 | Sunflower Well Service, Inc. | Canton, KS 67428 | Oil & Gas Operator | Aug 2025 |
| 423 | Sunny Day Resour | | Oil Operator | Dec 1987 |
| 424 | Sunoco Partners Marketing | | Oil Operator | Apr 2023 |
| 425 | Sunrise Oil Corp | | Oil Operator | Mar 1992 |
| 426 | Sunwest Explorat | | Oil & Gas Operator | Nov 1985 |
| 427 | Super Oilwell Service | Russell, KS 67665 | Oil Operator | Sep 2025 |
| 428 | Superior Oil Com | | Oil & Gas Operator | Dec 1994 |
| 429 | Superior Oilfield Services LLC | Wichita, KS 67218 | Oil Operator | Sep 2025 |
| 430 | Supernova Energy, Inc. | Wichita, KS 67226 | Oil & Gas Operator | Nov 2019 |
| 431 | Supra Energy, Inc. | Tulsa, OK 74137 | Oil & Gas Operator | May 1997 |
| 432 | Sutton Investmen | | Oil Operator | Mar 1987 |
| 433 | SW Gas Stge | | Gas Operator | Oct 2015 |
| 434 | Swander, Everett | Cunningham, KS 67035 | Oil Operator | May 1998 |
| 435 | Swenco-Western I | | Oil Operator | Sep 1987 |
| 436 | Swenton Michael J | Tulsa, OK 74105 | Oil & Gas Operator | Nov 2025 |
| 437 | Swift Energy Com | | Oil & Gas Operator | Sep 1995 |
| 438 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 439 | SX54, LLC | Sheridan, WY 82801 | Oil Operator | Nov 2017 |
Production numbers shown above are only for Kansas and for the production period listed.