| 1 | RIRX | Southeastern Industrial Enterprises, Inc. | 7/2005; eliminated 10/2006 | | NAKINA |
| 2 | RIRX | Rock Island Oil & Refining Co., Inc. | 4/1947-1/1950 | | NAKINA |
| 3 | RIRX | Duncan Oil Co., Inc. | 7/1937-1/1941 | | NAKINA |
| 4 | RIRX | Rock Island Refining Co. (Duncan Oil Co., Inc.) | 7/1935 | | NAKINA |
| 5 | RIRX | Rock Island Refining Co. | 7/1930-7/1932 | | NAKINA |
| 6 | RIRX | Rock Island Refining Co. (Duncan Oil Co., Inc.) | Apr-38 | | NRHS |
| 7 | RIRX | *ROCK ISLAND OIL & REFINING CO. [DUNCAN OIL CO., INC.] | | | PWRC |
| 8 | RIRX | +SOUTHEASTERN INDUSTRIAL ENTERPRISES, INC. | | | PWRC |
| 9 | RIRX | Southeastern Industrial Enterprises | | | RSRV |
| 10 | RIRX | SOUTHEASTERN INDUSTRIAL ENTERPRISES | | | SCAC4 |
