| 1 | KPCX | Koppers Industries, Inc. | added 10/1989; 1/1994-7/2005 | | NAKINA |
| 2 | KPCX | Koppers Co. | 7/1937-4/1938 | | NAKINA |
| 3 | KPCX | Koppers Co., Inc. | 1/1941-1/1980; eliminated 10/1989 | | NAKINA |
| 4 | KPCX | Koppers Products Co. | 8/1920; 7/1935 | | NAKINA |
| 5 | KPCX | Koppers Co., Inc. | 4/38-1/80; eliminated 10/89 | | NRHS |
| 6 | KPCX | Koppers Industries, Inc. | added 10/89; 1/94-7/2000 | | NRHS |
| 7 | KPCX | KOPPERS INDUSTRIES, INC. [KOPPERS COMPANY, INC.] | | | PWRC |
| 8 | KPCX | Koppers Industries | | | RSRV |
| 9 | KPCX | KOPPERS INDUSTRIES, INC. | | | SCAC4 |
