| Company name | Reg. code |
|---|---|
| FIRSTLY OÜ kustutatud | 14913514 |
| FIRSTUP OÜ | 16870973 |
| FIRSTEV OÜ | 16395395 |
| FIREFLY OÜ kustutatud | 11644947 |
| FIRSTON OÜ kustutatud | 11498351 |
| FIRSTWAY OÜ kustutatud | 12339413 |
| FIREFLY OÜ | 14955553 |
| FIRSTIN OÜ | 17171728 |
| FIRSTIT OÜ kustutatud | 11436806 |
| FIRSTX OÜ | 16769613 |
| FIRSTWAY LOGISTICS OÜ kustutatud | 12712102 |
| FIREFLY AERIALS OÜ kustutatud | 12680543 |
| FIRSTEL GROUP OÜ | 11286293 |
| FIRST OÜ kustutatud | 14896951 |
| FIRST BALTIC OÜ kustutatud | 12670036 |
| FIRST PRINCIPLE OÜ kustutatud | 14432826 |
| FIRST ALTEA OÜ kustutatud | 12025407 |
| BALTIC FIRST OÜ | 17183766 |
| FIRST PROJECT OÜ | 10944268 |
| FIRST EASYTEC OÜ | 14093784 |
| FIRST RENT OÜ kustutatud | 12251492 |
| FUN FIRST OÜ | 12973883 |
| FIRST BANCORP OÜ kustutatud | 14476373 |
| PROFIT FIRST OÜ | 16945524 |
| DATA FIRST OÜ | 16491141 |
| FIRST CONSTRUCTION OÜ (former name Realizaria OÜ) | 12879262 |
| FIRST GROUP OÜ kustutatud | 12785791 |
| FIRST RING OÜ | 16138485 |
| NEPTUNE FIRST OÜ | 16183793 |
| CLIENT FIRST OÜ (former name OÜ MC Erks) | 16746996 |
| FIRST PHARMA OÜ | 11941125 |
| FIRST UNIT OÜ kustutatud | 14855739 |
| FIRST PROMO OÜ | 12098961 |
| FIRST OPPORTUNITY OÜ kustutatud | 12281107 |
| FIRST NUMBER OÜ kustutatud | 11506085 |
| FIRST ACCOUNTING OÜ (former name Aliquanto OÜ) | 12810477 |
| FIRST4U OÜ | 17391772 |
| BABYS FIRST OÜ | 16593031 |
| FIRST GUILD OÜ (former name THEGUILD OÜ) | 14913448 |
| TECHNOLOGY FIRST OÜ | 17431371 |
| FIRST EHITUS OÜ kustutatud | 11126493 |
| FIRST DIGITAL OÜ kustutatud (former name Blockchain Project OÜ) | 14433915 |
| FIRST LIGHT OÜ kustutatud | 12008805 |
| KIDS FIRST OÜ kustutatud | 11624324 |
| FIRST AID OÜ kustutatud | 12771240 |
| EXPERIENCE FIRST OÜ kustutatud | 16655281 |
| SAFETY FIRST OÜ | 12759210 |
| FIRST HOUSE OÜ kustutatud | 12566818 |
| FIRST TRADE OÜ | 12550007 |
| FIRST HOLDING OÜ kustutatud | 16049190 |