| # | Entity | Status | State |
|---|---|---|---|
| 1 | 14 220 147 935 A.J DUFF & C.E DUFF & C.L DUFF & R.S DUFF |
ABN Cancelled | WA 6391 |
| 2 | 23 160 676 944 A.J DUFF & C.E DUFF |
ABN Active | WA 6280 |
| 3 | 86 298 844 646 A DUFF & C E DUFF |
ABN Cancelled | NSW 2430 |
| 4 | 34 552 507 053 C.T ALLEN & O.C DUFF & C EDIBAM & J.P LEWIS & E LITTON & G.K LO & G.B MCGRATH & D.J MORGAN & B.Y NG & P THYAGARAJAN & S.A WEBB & R WILKINSON & L YAW |
ABN Active | WA 6008 |
| 5 | 18 829 138 877 C.E DAVIES & S.A DUFF |
ABN Active | VIC 3070 |