| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 401 | Russell Oil Company | Haskell, OK 74436 | Oil & Gas Operator | Apr 2014 |
| 402 | Russell, John R | Oil Operator | Mar 2025 | |
| 403 | Rust Oil Corp. | Fort Worth, TX 76121 | Oil & Gas Operator | Mar 2026 |
| 404 | Rustler Energy LLC | Lindsay, OK 73052 | Oil & Gas Operator | Dec 2025 |
| 405 | RW Oil & Gas LLC | Lamont, OK 74643 | Oil & Gas Operator | Jan 2026 |
| 406 | Rwit Company Inc | Tulsa, OK 74131-4255 | Oil & Gas Operator | Jul 2018 |
| 407 | Ry-Co Petroleum | Wann, OK 74083 | Oil & Gas Operator | Feb 2017 |
| 408 | Ryan Petroleum Corp | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | Aug 1994 |
| 409 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |