| Company name | Reg. code |
|---|---|
| WCO OÜ | 16698942 |
| WCORP OÜ | 17211988 |
| WCODE OÜ | 17073888 |
| WCONSULT OÜ | 14356172 |
| WCOBALTIKA OÜ kustutatud | 12794531 |
| OCO OÜ | 12225098 |
| RCO OÜ | 14572438 |
| FCO1 OÜ kustutatud | 16667887 |
| ICO OÜ kustutatud | 14314446 |
| WRO OÜ | 10984411 |
| ECO100 OÜ | 14925931 |
| ECO OÜ kustutatud | 12042722 |
| MCO OÜ | 16270747 |
| WFO ESTONIA OÜ | 16162130 |
| ECO ADVICE OÜ | 10959152 |
| ECO WORLD OÜ | 14769193 |
| ECO4TOURISM OÜ | 16915693 |
| ECO.LIVING OÜ | 16741106 |
| MCO COMPUTING OÜ | 17270063 |
| ECO-ST OÜ | 10893068 |
| ECO-BETOON OÜ | 16470759 |
| ECO RIDE OÜ (former name Synergy Power OÜ) | 12703215 |
| JCO-CORP OÜ (former name Newtter OÜ) | 16580399 |
| ECO BRAND OÜ | 12254272 |
| ECO BENELUX OÜ kustutatud | 16672517 |
| ECO MAMMAS OÜ kustutatud | 16302861 |
| ECO TORU OÜ (former name Kinza Grill OÜ) | 14264636 |
| ECO SEPTIC OÜ | 16806923 |
| ECO-MOS OÜ kustutatud | 11430330 |
| ECO KODU OÜ kustutatud | 12248610 |
| ICO MEDIA OÜ kustutatud | 11308400 |
| ECO TUOTE OÜ | 12730695 |
| ESTBOATING ECO OÜ | 17068396 |
| ECO CHOICE OÜ kustutatud | 16100077 |
| ECO TRADER OÜ | 16219083 |
| ACO NORDIC OÜ | 11416399 |
| WOCO LIVING OÜ | 16574252 |
| WHO WINS OÜ | 17156864 |
| WILD ECO OÜ | 16201775 |
| ECO NUCLEUS OÜ | 16663694 |
| ECO CITYRIDER OÜ | 14920402 |
| ECO TRANSPORT OÜ | 16549685 |
| ECO-X OÜ | 12829991 |
| ECO AULA OÜ | 11936644 |
| MCO CONSULTING OÜ | 17364433 |
| ECO CAPITAL OÜ | 10187330 |
| WHO CARES OÜ | 12253663 |
| WSO GROUP OÜ kustutatud | 16488914 |
| SAAREMAA ECO OÜ | 16186314 |
| ECO WORLD OÜ kustutatud | 11743492 |