| 1 | USGX | Union Sugar Co. | added 1/1982; eliminated 1/1987 | | NAKINA |
| 2 | USGX | Union Sugar Division, Holly Sugar Corp. | added 1/1987; added 7/1990 | | NAKINA |
| 3 | USGX | Holly Sugar Corp. | added 7/1990; 1/1994; eliminated 4/1994 | | NAKINA |
| 4 | USGX | U.S. Magnesium, LLC | added 10/2008; eliminated 1/2009 | | NAKINA |
| 5 | USGX | Union Sugar Co. | added 1/82; eliminated 1/87 | | NRHS |
| 6 | USGX | Union Sugar Division, Holly Sugar Corp. | added 1/87; added 7/90 | | NRHS |
| 7 | USGX | Holly Sugar Corp. | added 7/90; 1/94; eliminated 4/94 | | NRHS |
| 8 | USGX | *HOLLY SUGAR CORPORATION [UNION SUGAR COMPANY] | | | PWRC |
| 9 | USGX | +US MAGNESIUM, LLC | | | PWRC |
| 10 | USGX | Union Sugar | | | RSRV |
| 11 | USGX | US MAGNESIUM LLC | | | SCAC4 |
