| # | Entity | Status | State |
|---|---|---|---|
| 1 | 64 165 240 415 O'BRIEN BOILER SERVICES (NSW) PTY LTD |
ABN Active | VIC 3020 |
| 2 | 84 083 010 093 O'BRIEN HOLDINGS (NSW) PTY LTD |
ABN Active | NSW 2533 |
| 3 | 86 142 682 451 O'BRIEN CORPORATION (NSW) PTY LIMITED |
ABN Cancelled | NSW 2155 |
| 4 | 72 084 792 002 DAVID O'BRIEN OBRIENS FENCING (NSW) |
ABN Active | NSW 2233 |
| 5 | 86 142 682 451 O'BRIEN CORPORATION (NSW) PTY LIMITED |
ABN Cancelled | NSW 2155 |