| 1 | WPS | WHEELING PITTSBURGH STEEL | | | PWRC |
| 2 | WPSI | WILSON PET SUPPLY INC | | | SCAC4 |
| 3 | WPSK | WAGRAM PAPER STOCK INC | | | SCAC4 |
| 4 | WPSMU | Wytwórnia Podkładów Strunobetonowych S.A. | | PL | VKM |
| 5 | WPST | WPS TEAM LOGISTICS, INC. | | | SCAC4 |
| 6 | WPSU | ALASKA STRUCTURES INC | | USA | BIC |
| 7 | WPSX | W.P. Stork Refrigerator Line | 7/1930-7/1932 | | NAKINA |
| 8 | WPSX | Wisconsin Public Service Corp. | added 10/1981; eliminated 4/1993; 1/1994-7/2005 (not listed) | | NAKINA |
| 9 | WPSX | Wisconsin Public Service Corp. | added 10/81; eliminated 4/93; 1/94-7/2000 | | NRHS |
| 10 | WPSX | *W. P. STORK REFRIGERATOR LINE | | | PWRC |
| 11 | WPSX | *WESTERN PLANT SERVICES (CALIFORNIA) | | | PWRC |
| 12 | WPSX | +WISCONSIN PUBLIC SERVICE CORPORATION | | | PWRC |
| 13 | WPSX | Wisconsin Public Service Corporation | | | RSRV |
| 14 | WPSX | WISCONSIN PUBLIC SERVICE CORPORATIO | | | SCAC4 |
