| ALTIUM LIMITED | Former Name (Historical) | ASIC |
| PROTEL INTERNATIONAL LIMITED | Former Name (Historical) | ASIC |
| PROTEL INTERNATIONAL PTY LTD | Former Name (Historical) | ASIC |
| PROTEL TECHNOLOGY PTY. LTD. | Former Name (Historical) | ASIC |
| S.J. GUMLEY SERVICES PTY. LIMITED | Former Name (Historical) | ASIC |
| ALTIUM LIMITED | Main Name (Current) | ABR |
| PROTEL INTERNATIONAL LIMITED | Main Name (Historical) | ABR |
| ALTIUM LIMITED | Main Trading Name (Current) | ABR |
| PROTEL INTERNATIONAL LIMITED | Main Trading Name (Historical) | ABR |
| COMPUTERSHARE INVESTOR SERVICES PTY LTD | Other Trading Name (Current) | ABR |