| 1 | PSPX | Chevron Phillips Chemical Co., LP | added 10/2002; 7/2005 | | NAKINA |
| 2 | PSPX | Phillips Petroleum Co. | added 10/1995; 7/2000; eliminated 10/2002 | | NAKINA |
| 3 | PSPX | Phillips 66 Co., a Subsidiary of Phillips Petroleum Co. | added 7/1986; 1/1994; eliminated 10/1995 | | NAKINA |
| 4 | PSPX | Phillips Petroleum Co. | 7/1937-1/1980; eliminated 7/1986 | | NAKINA |
| 5 | PSPX | Bartex Pipe Line Co. (Phillips Petroleum Co.) | 7/1935 | | NAKINA |
| 6 | PSPX | Phillips Petroleum Co. | 8/1920-7/1932 | | NAKINA |
| 7 | PSPX | Phillips Petroleum Co. | 4/38-1/80; eliminated 7/86 | | NRHS |
| 8 | PSPX | Phillips 66 Co., a Subsidiary of Phillips Petroleum Co. | added 7/86; 1/94; eliminated 10/95 | | NRHS |
| 9 | PSPX | Phillips Petroleum Co. | added 10/95; 7/2000 | | NRHS |
| 10 | PSPX | CHEVRON PHILLIPS CHEMICAL CO., LP [PHILLIPS PETROLEUM CO.] | | | PWRC |
| 11 | PSPX | Phillips Petroleum | | | RSRV |
| 12 | PSPX | PHILLIPS PETROLEUM CO | | | SCAC3 |
| 13 | PSPX | CHEVRON PHILLIPS CHEMICAL COMPANY L | | | SCAC4 |