| # | Entity | Status | State |
|---|---|---|---|
| 1 | 52 895 236 569 ANNE LEIGH ELCOCK Sounds Serious Books |
ABN Cancelled | QLD 4121 |
| 2 | 58 730 626 986 SIMON HARRINGTON Sounds Serious |
ABN Active | QLD 4226 |
| 3 | 78 059 691 020 DELFOX PTY. LTD. MTX - SERIOUS ABOUT SOUND |
ABN Cancelled | NSW 2118 |
| 4 | 85 676 231 661 THE K G AND H M PELL FAMILY TRUST SOUND SERIOUS |
ABN Cancelled | VIC 3160 |
| 5 | 18 982 109 581 JERRAD EDWARD MIALSZYGROSZ SOUNDS SERIOUS |
ABN Active | VIC 3429 |
| 6 | 70 786 633 762 HUGO ROBERT MICHAEL HAYES Serious About Sound |
ABN Active | NSW 2479 |