| Company name | Reg. code |
|---|---|
| WESTRUM OÜ | 10539036 |
| WESTROM INVEST OÜ | 14751909 |
| WESTLUX OÜ kustutatud | 10615211 |
| WESTPUB OÜ | 10719347 |
| WESTFUS OÜ | 17365757 |
| WESTLUX OÜ | 11228769 |
| WESTRAX OÜ kustutatud | 16375073 |
| WESTCOM ENGINEERING OÜ kustutatud | 12577928 |
| JVP WESTCOM OÜ kustutatud | 12635838 |
| WESTHAM SERVICE OÜ kustutatud | 11815573 |
| WESTISM MUSIC OÜ | 16091890 |
| WESTREX TRADE OÜ | 10613815 |
| WESTHAM INVEST OÜ | 10637709 |
| WESTCOM INVEST OÜ | 17091900 |
| WESTHAM TRADE OÜ kustutatud | 12393387 |
| WELTRUM OÜ | 14415360 |
| TESTRUM OÜ | 14553145 |
| ESTRUM OÜ | 10308472 |
| VESTRUM SOFTWARE OÜ | 14798255 |
| MENTRUM OÜ | 16283997 |
| SISTRUM OÜ | 16107674 |
| NOSTRUM OÜ kustutatud | 12372103 |
| MUSTRUM OÜ | 14244929 |
| NESTRAM OÜ kustutatud | 10625451 |
| WELTRAUM OÜ kustutatud | 11276343 |
| ROSTRUM OÜ | 10137160 |
| INSTRUM OÜ (former name Instrum UÜ) | 14152914 |
| VESTIUM OÜ | 16268420 |
| POSTRUM OÜ | 12735868 |
| CASTRUM OÜ kustutatud | 11705910 |
| HESTRÖM OÜ | 11544743 |
| CENTRUM OÜ | 16921618 |
| MEETRUM OÜ | 14345085 |
| VECTRUM OÜ | 16991978 |
| NEXTRUM OÜ | 11925971 |
| LESTROM OÜ | 12531240 |
| RESTORUM OÜ | 14555865 |
| WESTM OÜ | 12773718 |
| WESTOM CARS OÜ | 16117425 |
| WESTOM GRUPP OÜ | 12730643 |
| WESTEM EHITUSED OÜ kustutatud (former name HS Estate OÜ) | 16258918 |
| WESTRA GROUP OÜ | 17455845 |
| ASTRUM OÜ | 11489323 |
| ELTRUM OÜ | 10008132 |
| BESTUM OÜ | 16946044 |
| CENTRUM CONSULTING OÜ | 10565654 |
| NOSTRUM CAPITAL OÜ | 12925329 |
| ESTLOGISTIC CENTRUM OÜ | 14358455 |
| BIOMASS CENTRUM OÜ (former name BioMass OÜ) | 17295330 |
| AKORDION CENTRUM OÜ | 10633031 |