| # | Entity | Status | State |
|---|---|---|---|
| 1 | 27 164 495 961 BT CIVIL (NSW) PTY LTD |
ABN Active | NSW 2765 |
| 2 | 51 145 561 860 BT CIVIL PTY LTD |
ABN Active | WA 6107 |
| 3 | 61 680 215 301 BT RAIL AND CIVIL PTY LTD |
ABN Active | NSW 2289 |
| 4 | 99 678 885 688 BT ELECTRICAL CIVIL PTY LTD |
ABN Active | QLD 4557 |
| 5 | 27 937 391 859 THE TRUSTEE FOR TIGCHELAAR FAMILY TRUST BT Civil Contractors |
ABN Cancelled | WA 6107 |
| 6 | 61 680 215 301 BT RAIL AND CIVIL PTY LTD BT RAIL AND CIVIL |
ABN Active | NSW 2289 |