| Company name | Reg. code |
|---|---|
| MANTRUM OÜ | 10213174 |
| MANTRUM VEOD OÜ | 16017161 |
| MER MANTRAM OÜ | 12214841 |
| MANTRAL OÜ | 12444854 |
| MANTSUR OÜ | 17249117 |
| MENTRUM OÜ | 16283997 |
| MYNTRUM OÜ | 16736074 |
| TANTRUM OÜ | 11958502 |
| MAATRUM OÜ | 16030262 |
| AGD COMPANY OÜ (former name Mantra OÜ) | 14494603 |
| ANTRUM OÜ | 14029774 |
| MANSUM OÜ | 10977954 |
| MENTRUM BALTIC OÜ | 11985200 |
| ZANTIUM OÜ | 14338961 |
| AMAITRUM OÜ | 14896520 |
| MUSTRUM OÜ | 14244929 |
| JÄÄTRUM OÜ | 10971590 |
| MASTERUM OÜ (former name Masterum UÜ) | 14960063 |
| MONSTRUM OÜ | 11227451 |
| MONTUUM OÜ | 17424909 |
| NANTIUM OÜ kustutatud | 14179103 |
| SANTRAM OÜ kustutatud | 16233367 |
| CASTRUM OÜ kustutatud | 11705910 |
| KONTRUM OÜ | 10703895 |
| CENTRUM OÜ | 16921618 |
| FANDRUM OÜ | 11108396 |
| MEETRUM OÜ | 14345085 |
| SMARTRUM OÜ (former name Hotellilukk OÜ) | 12640443 |
| MAITREM OÜ kustutatud | 16538701 |
| SANDRUM OÜ kustutatud (former name Lux Autopesula OÜ) | 11700734 |
| KANTUM OÜ | 14242586 |
| ASTRUM OÜ | 11489323 |
| FATRUM OÜ kustutatud | 11006810 |
| MANTRA KIRJASTUS OÜ kustutatud | 11224754 |
| MANTRA HOME OÜ | 16203573 |
| MANTRA METS OÜ | 12589280 |
| MANTRA TOURUS OÜ kustutatud (former name Dexter International Exchange OÜ) | 14747607 |
| CIPUTRA MANTUP OÜ | 11958019 |
| MANTRA & MANDALA OÜ | 14308664 |
| MANTRA MAA OÜ | 14832833 |
| MANTRA VARAHALDUS OÜ | 11210491 |
| MANTRA VISIONS OÜ | 17042348 |
| BLACK MANTRA OÜ kustutatud | 14424620 |
| CENTRUM CONSULTING OÜ | 10565654 |
| MAXTROM FINANCE OÜ | 16618446 |
| BALTRUM INVEST OÜ | 10843573 |
| ESTLOGISTIC CENTRUM OÜ | 14358455 |
| BIOMASS CENTRUM OÜ (former name BioMass OÜ) | 17295330 |
| AKORDION CENTRUM OÜ | 10633031 |
| CREDIT CENTRUM OÜ kustutatud | 12026223 |