| # | Entity | Status | State |
|---|---|---|---|
| 1 | 18 601 848 935 ONE STUDIO MELBOURNE ARCHITECTURE PTY LTD |
ABN Active | VIC 3151 |
| 2 | 89 092 209 302 ONE ARCHITECTURE AND INTERIORS PTY LTD |
ABN Active | NSW 2207 |
| 3 | 18 044 341 309 MARK KEFALOUKOS One Architecture |
ABN Active | VIC 3223 |
| 4 | 32 945 132 890 R.J GREY & G.M PARTRIDGE Studio One Architecture |
ABN Cancelled | VIC 3122 |
| 5 | 34 731 710 805 ANTHONY JOHN CLARKE BLACK LINE ONE X ARCHITECTURE STUDIO |
ABN Active | VIC 3070 |
| 6 | 35 416 742 914 KOK HEONG SEBASTIAN TEO Design one Architecture Studio |
ABN Active | VIC 3023 |
| 7 | 74 337 066 500 PITT YIMSIRI One Stop Architecture & Project Management |
ABN Active | NSW 2135 |