| Company name | Reg. code |
|---|---|
| KSK AS kustutatud | 10073796 |
| KASK TURISM AS kustutatud | 10291292 |
| PÄRNU KEK AS | 10052437 |
| HARJU KEK AS | 10029482 |
| KPK TEEDEEHITUS AS kustutatud | 10210690 |
| KEK INVEST AS | 10061600 |
| KEK TRADING INTERNATIONAL AS | 10672019 |
| VÕRU KEK TRANSPORT AS kustutatud | 10242661 |
| KESK-EESTI ÄRIKESKUS AS | 10565217 |
| KELKORAEHITUS AS AS (former name AS KEK-i Ehitus) | 10112680 |
| BALTIKA AS (former name KJK BLTK Holding AS) | 16008469 |