| Company name | Reg. code |
|---|---|
| IZO OÜ | 12768999 |
| IZO FEST OÜ | 14713353 |
| IZOLA OÜ kustutatud | 12837973 |
| IZOARD OÜ | 16702678 |
| IZOMAT OÜ kustutatud (former name IZOmat Group OÜ) | 14016230 |
| IZOROOF OÜ | 16102100 |
| IZORETS OÜ | 14663388 |
| SV IZOLBET OÜ | 11301897 |
| IZODOM ESTONIA OÜ | 14041681 |
| IZOVENT PAIGALDUS OÜ | 17175235 |
| S PANEL OÜ (former name Izopanel OÜ) | 12443375 |
| IRO OÜ | 14262531 |
| IVO OÜ kustutatud | 12332581 |
| OIZO OÜ | 14489140 |
| EZO OÜ | 11469869 |
| IGO24/7 OÜ | 14205504 |
| ILO OÜ | 16607112 |
| GIZO OÜ | 16974483 |
| IGZO OÜ | 14050421 |
| IVO OÜ | 17298630 |
| ICO OÜ kustutatud | 14314446 |
| IZOPANEL EUROPEAN DISTRIBUTION CENTER OÜ | 16293100 |
| ILO VELI OÜ | 14023039 |
| IPO REGISTRATION OÜ kustutatud | 16791943 |
| ISO PROFIT OÜ | 14313116 |
| ILO BEK OÜ | 16950809 |
| ILO KAUBANDUS OÜ | 12547910 |
| KIRJASTUS ILO OÜ | 14840962 |
| IVO MELIM OÜ | 14906554 |
| IZZO VENTURES OÜ | 16232054 |
| OZO CONSULTING OÜ | 14937791 |
| IKO TRADE OÜ | 11967293 |
| IKO SCIENCE OÜ | 11816851 |
| ICO MEDIA OÜ kustutatud | 11308400 |
| IZU MITSUNE OÜ kustutatud (former name Home Express OÜ) | 12999196 |
| ITO KAPITAL OÜ | 12559103 |
| VTOR-IKO OÜ | 17212775 |
| WIZO ESTATE OÜ (former name DreaM art OÜ) | 12835508 |
| IMO HOLDING OÜ | 16913866 |
| ICO SOLUTIONS OÜ kustutatud | 14535035 |
| IXZO DIGITAL OÜ (former name Belax Production OÜ) | 14444380 |
| IVO LILLE OÜ | 11239684 |
| UCC ICO OÜ (former name Central Ledger OÜ) | 14537732 |
| EZO STUUDIO OÜ | 16433014 |
| INO HILL OÜ | 11728242 |
| E-ISO OÜ | 16535677 |
| IZI TRADE OÜ kustutatud | 11970523 |
| IZI CREDIT OÜ kustutatud (former name OÜ Izi Car) | 12805482 |
| UZO SHIA OÜ | 17406692 |
| ICO PARK OÜ | 12401945 |