| Ettevõtte nimi | Reg. kood |
|---|---|
| O.K. RESEARCH OÜ | 14450563 |
| K.L. RESEARCH OÜ | 16298059 |
| KADOT RESEARCH OÜ | 16854543 |
| KLARENBACH RESEARCH OÜ | 16862525 |
| KAPLAN RESEARCH COMPANY OÜ | 16242656 |
| KONTOUR RESEARCH INSIGHTS OÜ | 16928282 |
| KNOT RESEARCH AND CONSULTANCY OÜ | 16266088 |
| KINGS HERBAL RESEARCH LABORATORIES OÜ kustutatud | 14865985 |