| 1 | UOPX | Union Oil Co. of Pennsylvania | 7/1923 | | NAKINA |
| 2 | UOPX | Union Oil Co. of Pennsylvania, Inc. | 7/1937 (not listed) | | NAKINA |
| 3 | UOPX | UOP, A New York Partnership | added 1/1997; eliminated 7/1997; 7/2000-7/2005 (not listed) | | NAKINA |
| 4 | UOPX | UOP, A New York Partnership | added 1/97; eliminated 7/97; 7/2000 | | NRHS |
| 5 | UOPX | UOP A NEW YORK PARTNERSHIP [UNION OIL CO.] | | | PWRC |
| 6 | UOPX | UOP New York | | | RSRV |
| 7 | UOPX | UOP A NEW YORK PARTNERSHIP | | | SCAC4 |
