| Company name | Reg. code |
|---|---|
| A.K.K. AS | 10048114 |
| A.T.K AS kustutatud | 10071969 |
| K.A.T. & KO AS | 10250382 |
| TAVAST EESTI OÜ (former name K.A. Rasmussen AS) | 10680467 |
| K & H AS kustutatud | 10241710 |
| "KPG" AS | 10050097 |
| KBE AS | 10079103 |
| KMV AS kustutatud | 10029594 |
| KSK AS kustutatud | 10073796 |
| KAWE AS (former name AS Kawe Group) | 10813342 |
| KABA AS kustutatud | 10121940 |
| KONE AS | 10205453 |
| K.S. AS kustutatud | 10507220 |
| KUMA AS | 10030746 |
| KPMG AS | 935174627 (Norra) |
| KPMG AS | 935174627 |
| KAARMA KT AS | 10046003 |
| K.MET AS | 10100932 |
| KNAAP AS kustutatud | 10324040 |
| KÜTAK AS kustutatud | 10459722 |
| ASTEL KT kustutatud | 10129858 |
| KATUS AS | 10001590 |
| KAMCO AS | 880604732 |
| KEPAX AS | 10722390 |
| KAMEL AS | 10085948 |
| KOVEK AS | 10395123 |
| ASU KH OÜ | 12985030 |
| KIA AUTO AS | 10312396 |
| KÜÜ KOHVIK AS kustutatud | 10287451 |
| KIHNU KALA AS | 10251016 |
| KULTAS AS kustutatud | 10009605 |
| KRAGEN AS | 10101765 |
| Kadri Asi kustutatud | 10937535 |
| KRAVER AS | 10086830 |
| KEVELT AS (former name Aktsiaselts KEVELT) | 10418580 |
| AS Kupjur | 64029633 |
| ASTRI & KP kustutatud | 10301702 |
| KANPOL AS | 10207280 |
| KOHIMO AS kustutatud | 10048137 |
| Asta Käro kustutatud | 12177330 |
| KRAFTI AS | 994065432 |
| KURMET AS | 10101860 |
| KÜTEKS AS kustutatud | 10380363 |
| K-MOST AS (former name aktsiaselts BAUMOST) | 10066253 |
| KOGUVA AS kustutatud | 10356761 |
| KEILAR AS | 10265886 |
| KUMARI AS | 10282896 |
| KEIO-E AS kustutatud | 10316951 |
| KURMIK AS | 10244542 |
| KAVENT AS | 10449741 |