| 1 | ACRX | Elementis Chromium, LP | added 10/2003; 7/2005 | | NAKINA |
| 2 | ACRX | American Chrome & Chemicals Inc. | added 4/1980; 1/1985-1/1994; eliminated 7/1998; 7/2000 (not listed) | | NAKINA |
| 3 | ACRX | American Chrome & Chemicals Inc. | added 4/80; 1/94; eliminated 7/98; 7/2000 | | NRHS |
| 4 | ACRX | ELEMENTIS CHROMIUM LP [AMERICAN CHROME & CHEMICALS INC.] | | | PWRC |
| 5 | ACRX | American Chrome and Chemicals (Elementis Chromium) | | | RSRV |
| 6 | ACRX | ELEMENTIS CHROMIUM LP | | | SCAC4 |
