| Company name | Reg. code |
|---|---|
| BTK OÜ | 14182080 |
| BTK RAIL OÜ kustutatud | 14435173 |
| INTOR BTK OÜ | 17226694 |
| BTK COMMERCE OÜ | 12755554 |
| BTK EHITUSGRUPP OÜ (former name BTK Ehitusgrupp UÜ) | 16000195 |
| GRAFILINER BTKK OÜ (former name BEATUS OÜ) | 11388823 |
| BTRK OÜ | 14500094 |
| 22BEK OÜ kustutatud | 16124678 |
| BEK OÜ | 10425255 |
| BTP OÜ | 16240982 |
| 3DBTK OÜ | 14942119 |
| BIK OÜ kustutatud | 11405929 |
| BTS OÜ (former name Meier Foundation OÜ) | 16409027 |
| BCK OÜ | 12562921 |
| BUK OÜ | 16791044 |
| BTM OÜ kustutatud | 11790117 |
| BTR90 OÜ | 16714768 |
| BBK OÜ | 16247725 |
| BTC OÜ | 10308727 |
| BTW OÜ | 14758640 |
| BTX OÜ | 12700286 |
| BTN OÜ | 16319608 |
| BTD MANAGEMENT OÜ kustutatud | 16424216 |
| BKK HOLDING OÜ | 12615474 |
| BTG BALTIC OÜ | 10570566 |
| BTS INTERNATIONAL OÜ | 10543629 |
| BTB AEROTECH OÜ | 16584351 |
| BTI GROUP OÜ (former name IBTTrade OÜ) | 16240901 |
| BTM TECH OÜ | 12063750 |
| ATK TRANSPORT OÜ kustutatud | 12580929 |
| BSK GAMES OÜ kustutatud (former name InterMassive OÜ) | 12994388 |
| BTO EHITUSE OÜ kustutatud | 11240144 |
| BTI TRADING OÜ | 12868028 |
| BTB AGRO OÜ | 10679949 |
| ATK LINAVÄSTRIK OÜ | 10209356 |
| BSK GROUP OÜ | 16463050 |
| BVK SERVICE OÜ kustutatud (former name BVK Service UÜ) | 14518019 |
| BTR ADVISOR OÜ (former name Osaühing BTR LOGISTIC) | 10518376 |
| ILO BEK OÜ | 16950809 |
| BTV FINANCE OÜ | 12761715 |
| AGROTECH BNK OÜ | 14525485 |
| BTN TOOLS OÜ | 12946633 |
| BPK EUROPE OÜ kustutatud | 12893457 |
| BTH INVEST OÜ (former name OÜ Baltic Ticket Holdings) | 11373603 |
| BTI SERVICE OÜ (former name BTI Group) | 11834139 |
| ATK INVESTMENTS OÜ | 16375469 |
| BTF2 EPSILON OÜ kustutatud (former name OÜ Prangli-Preedi Põllud ja Metsad) | 10817311 |
| BTF2 BEETA OÜ (former name OÜ Pisisaare-Pitkanina Põllud ja Metsad) | 10817386 |
| BTF2 ALFA OÜ (former name OÜ Pikkoja-Pikksaare Põllud ja Metsad) | 10817340 |
| BTF3 B OÜ (former name Paaksima Põllud OÜ) | 10816375 |