| 1 | AJAX | Agramericas, Inc. | added 7/2007 | | NAKINA |
| 2 | AJAX | Ajax Transportation Co., Inc. | 7/1937-1/1943 | | NAKINA |
| 3 | AJAX | Ajax Tank Car Co. | 7/1930-7/1932 | | NAKINA |
| 4 | AJAX | Ajax Transportation Co., Inc. | Apr-38 | | NRHS |
| 5 | AJAX | *AJAX TRANSPORTATION CO. [AJAX TANK CAR CO.] | | | PWRC |
| 6 | AJAX | +AGRAMERICAS, INC. | | | PWRC |
| 7 | AJAX | AJAX TRANS CO, INC | | | SCAC3 |
