| 1 | PDSX | Penn-Dixie Cement Corp. | eliminated 10/1981 | | NAKINA |
| 2 | PDSX | Penn-Dixie Industries, Inc. | added 10/1974; 1/1975-1/1980 | | NAKINA |
| 3 | PDSX | Penn-Dixie Cement Corp. | 1/1952-4/1970; eliminated 10/1974 | | NAKINA |
| 4 | PDSX | Pennsylvania-Dixie Cement Corp. | 7/1930-1/1950 | | NAKINA |
| 5 | PDSX | Pennsylvania-Dixie Cement Corp. | Apr-38 | | NRHS |
| 6 | PDSX | Penn-Dixie Cement Corp. | 1/52-4/70 | | NRHS |
| 7 | PDSX | Penn-Dixie Industries, Inc. | 1/75-1/80 | | NRHS |
| 8 | PDSX | Penn-Dixie Cement Corp. | eliminated 10/81 | | NRHS |
| 9 | PDSX | PENN-DIXIE CEMENT CORP. | | | PWRC |
| 10 | PDSX | PENN-DIXIE CEMENT CORP | | | SCAC3 |