| Company name | Reg. code |
|---|---|
| FORTIOR OÜ | 16663853 |
| FORTIORI OÜ | 12580669 |
| FORTINOR OÜ kustutatud | 11027930 |
| RAMOS FORTIER OÜ kustutatud | 14717824 |
| FORTEMOR OÜ | 11257848 |
| FORTMAR OÜ (former name FORTMAR UÜ) | 16583736 |
| FORMIOS OÜ kustutatud | 11136412 |
| FORTICOM OÜ kustutatud | 10810036 |
| FORTIFY OÜ | 11380000 |
| FORTING OÜ | 16415909 |
| FORAKOR OÜ | 16840222 |
| FORTEON OÜ | 17042706 |
| FORTIUM OÜ | 16465971 |
| FORTVORT OÜ | 11424536 |
| FORTIUS OÜ | 16617599 |
| FORTATOR OÜ | 12874394 |
| FORTIMER OÜ | 10194198 |
| FORTIMA OÜ | 12529935 |
| FORTITER OÜ | 11812215 |
| FORTOP OÜ | 10073537 |
| FORTON OÜ | 12317883 |
| FORBIO OÜ | 11488016 |
| FORTIS OÜ | 14900428 |
| FORIOX OÜ | 14699601 |
| FORTIUM FINANCE OÜ | 12280358 |
| FORTIUS BALTIC OÜ kustutatud | 11418122 |
| FORTMAR TP OÜ | 16855749 |
| FORTIUS SPORT OÜ (former name AGERA House OÜ) | 16356683 |
| FORTIVO GRUPP OÜ | 17453237 |
| FORTITER GRUPP OÜ kustutatud | 10524974 |
| SAVANTE FORTIST OÜ (former name HobiFin OÜ) | 16046961 |
| FORTIUM HOLDINGS OÜ | 11343068 |
| FORTIUS SERVICES OÜ | 16439778 |
| FORTING GROUP OÜ (former name Nidental Grupp OÜ) | 12986733 |
| FORTIGO TRADE OÜ | 14327851 |
| FORTIUM ESTATE OÜ kustutatud | 11342867 |
| FORTICON EHITUS OÜ | 17355807 |
| FORTIVA KINNISVARA OÜ | 17196421 |
| FORTO OÜ | 14224298 |
| FORTR OÜ kustutatud | 16466203 |
| FORTIS CONSULTING OÜ | 12217288 |
| FORTIS HOLDING OÜ | 14493319 |
| FORTIS LINKS OÜ | 14245484 |
| FORTIN EUROPE OÜ | 14514056 |
| SPORDIKOOL FORTIS OÜ | 11710012 |
| FORTIS INVEST OÜ | 16306570 |
| FORTIS EESTI OÜ | 11605249 |
| FORTIS MEDIA OÜ kustutatud | 16525880 |
| FORTIS AGER OÜ | 11705778 |
| FORTOM BALTIC OÜ kustutatud | 11519900 |