| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 401 | Ry-Co Petroleum | Wann, OK 74083 | Oil & Gas Operator | Feb 2017 |
| 402 | Ryan Petroleum Corp | Oklahoma City, OK 73102-9024 | Oil & Gas Operator | Aug 1994 |
| 403 | Ryder Scott Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2005 |