| 1 | SPEX | C.A. Spencer & Son Co. | 8/1920-7/1923 | | NAKINA |
| 2 | SPEX | Stork Brothers Refrigerator Line Co. | 7/1932 | | NAKINA |
| 3 | SPEX | Stork Brothers Refrigerator Line Co. (North Western Refrigerator Line Co.) | 7/1935 | | NAKINA |
| 4 | SPEX | Southern Pine Extracts Co. | 1/1952-10/1957; eliminated 7/1960 | | NAKINA |
| 5 | SPEX | Southern Pine Extracts Co. | 1/52-10/57; eliminated 7/60 | | NRHS |
| 6 | SPEX | *C. A. SPENCER & SON CO. | | | PWRC |
| 7 | SPEX | *STORK BROTHERS REFRIGERATOR LINE CO. | | | PWRC |
| 8 | SPEX | *SOUTHERN PINE EXTRACTS CO. | | | PWRC |
| 9 | SPEX | +SOUTHERN PARTS & EQUIPMENT INC. | | | PWRC |
| 10 | SPEX | SOUTHERN PARTS & EQUIPMENT INC | | | SCAC4 |
