| Company name | Reg. code |
|---|---|
| CIRCLE OÜ kustutatud (former name OSAÜHING CIRCLE) | 11038247 |
| CIRCLE AD OÜ | 12597747 |
| CIRCLE-M OÜ | 16116561 |
| CIRCLE LINE OÜ | 12490297 |
| CIRCLE TECH OÜ | 17224011 |
| SOLID CIRCLE OÜ | 17423130 |
| GREEN CIRCLE OÜ (former name Green Circle UÜ) | 12919719 |
| CIRCLE CONSULT OÜ | 12305986 |
| CIRCLE BIZNESS OÜ kustutatud | 12745538 |
| CIRCLE CAPITAL OÜ | 16272433 |
| CIRCLE SYSTEMS OÜ kustutatud | 16381530 |
| CIRCLE MARKETING OÜ kustutatud | 11641601 |
| CIRCLE DEVELOPMENT OÜ | 16940538 |
| CIRCLE O TRADE OÜ | 14297251 |
| HEALTH-CIRCLE OÜ kustutatud | 12953797 |
| V1CIRCLE OÜ kustutatud | 16349093 |
| T CIRCLE HOLDING OÜ | 16524952 |
| GLOBAL WORK CIRCLE OÜ | 16969683 |
| HIGHER SELF CIRCLE OÜ | 16249747 |
| CIRCLE K TRANSPORT EESTI OÜ (former name OBV Estonia OÜ) | 14076076 |
| THE CIRCLE NAVAL ARCHITECTURE OÜ | 17231330 |
| COMPLETE CIRCLE OF CARE HOLDINGS OÜ | 14774745 |
| E-CIRCLE INVESTMENT GROUP OÜ kustutatud | 14287548 |
| HAGUDI PM OÜ kustutatud (former name Circle K OÜ) | 12937060 |
| LAINEHARJAL OÜ kustutatud (former name Circle Hold OÜ) | 12766687 |
| SKYTREE OÜ (former name Circle K Eesti OÜ) | 12984817 |
| PENDLAÕUE OÜ (former name Circle K Treasury Operations Europe OÜ) | 12990114 |
| BRAINY CIRCLES OÜ | 17226352 |
| CIRCEL HX OÜ kustutatud | 16586278 |
| PROJECT CIRCL OÜ | 17209891 |
| CIRCUP OÜ kustutatud | 14509546 |
| CIRCLIO OÜ | 17119691 |
| 2CIRCAS OÜ | 16211756 |
| CIRCUM OÜ | 14224482 |
| NIKULIN CIRCUS OÜ | 12584398 |
| CIRCUS ABSURDUM OÜ | 16667516 |
| CIRCUS ESTONIA OÜ | 14366822 |
| CIRCULO BALTIC OÜ | 16873500 |
| CIRCON PROJEKT OÜ | 14806592 |
| CIRCUT COURIER OÜ | 17209537 |
| CIRCA ENTERTAINMENT OÜ | 16568004 |
| CIRCLEQING OÜ | 16896033 |
| CIRCLEMOON OÜ | 16948637 |
| CIRCLEHILL OÜ | 14807798 |
| CIRCLEMARKETPLACE.COM OÜ kustutatud | 14964351 |
| THCIRCLE OÜ | 14611606 |
| FTCIRCLE OÜ | 14252076 |
| CISELE OÜ (former name ismajilv OÜ) | 16575091 |
| MIRACLE OÜ | 10622978 |
| PIRKLE OÜ | 12259855 |