| 1 | ESSX | Colonial Chemical Co., Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 2 | ESSX | Transerv Systems, Inc. | added 1/1970; 4/1970; eliminated 10/1971 | | NAKINA |
| 3 | ESSX | Essex Industries, Inc. | added 10/1968; eliminated 1/1970 | | NAKINA |
| 4 | ESSX | Essex Industries, Inc. | added 10/68; eliminated 1/70 | | NRHS |
| 5 | ESSX | Transerv Systems, Inc. | added 1/70; 4/70; eliminated 10/71 | | NRHS |
| 6 | ESSX | Colonial Chemical Co. | Jul-00 | | NRHS |
| 7 | ESSX | *TRANSERV SYSTEMS, INC. [ESSEX INDUSTRIES, INC.] | | | PWRC |
| 8 | ESSX | +COLONIAL CHEMICAL COMPANY | | | PWRC |
| 9 | ESSX | Essex Industries (Colonial Chemical) | | | RSRV |
| 10 | ESSX | COLONIAL CHEMICAL COMPANY | | | SCAC4 |