| Company name | Reg. code |
|---|---|
| SEM SEO OÜ kustutatud | 14912644 |
| SEM9 OÜ | 16691377 |
| SEE ON SEE OÜ | 14964084 |
| SEM NELI OÜ kustutatud | 14028657 |
| SEM KOLM OÜ | 12933659 |
| SEM-BALTIC OÜ | 14661188 |
| SEM BUS OÜ | 16863364 |
| SEM SERVIS OÜ (former name Semservis) | 11002387 |
| SEM EVOLUTION OÜ | 12547175 |
| SEM & FLEH OÜ kustutatud | 10370755 |
| SEM VENTURES OÜ | 17338751 |
| SEM MEDIA OÜ | 14507317 |
| SEM KAKS OÜ | 12922236 |
| SEM SERVICES OÜ kustutatud | 14014827 |
| SEM CAPITAL OÜ | 12276641 |
| SEM SYSTEMS OÜ | 12285580 |
| SEE1 OÜ | 14982797 |
| SEF OÜ (former name Svensk-Estniska Fondbolagen OÜ) | 12731826 |
| SEC OÜ | 12700205 |
| SEE OÜ | 12117859 |
| SEK OÜ kustutatud | 10968518 |
| 1SEC OÜ (former name ListUP OÜ) | 14757994 |
| SEMO OÜ | 11231642 |
| SEA OÜ | 14677143 |
| SEH OÜ | 14568431 |
| SEE2 OÜ | 16083933 |
| SEI7 OÜ | 14932121 |
| 5SEC OÜ kustutatud | 12994589 |
| SEM ANTICS AGENCY OÜ | 16149359 |
| SEL COACHING OÜ | 17200447 |
| ZENITH SEA OÜ (former name Startup Ventures OÜ) | 14588862 |
| SAND & SEA OÜ | 12629967 |
| DEEP SEA OÜ | 17272636 |
| SEE REEDE OÜ (former name Giraffe Property OÜ) | 12453735 |
| SEA ADVENTURE OÜ | 14039388 |
| 29SEC AGENCY OÜ | 17292366 |
| SAT@SEA OÜ | 14004332 |
| SEA COURIER OÜ | 16125287 |
| MARVEN SEC OÜ kustutatud | 12196505 |
| SEA TRADE OÜ kustutatud | 16715043 |
| SMART SEA OÜ | 16457380 |
| AI4SEC OÜ | 16087345 |
| SEA IMAGES OÜ kustutatud (former name OÜ Inforte) | 10344381 |
| SEG ABROAD OÜ (former name SEG Study in Europe OÜ) | 14038992 |
| SEA ASIA OÜ | 12287946 |
| SEA FOREST OÜ kustutatud | 12804531 |
| SEA MOON OÜ | 12360399 |
| SEN-LAB OÜ | 14528578 |
| SEA INVEST OÜ kustutatud | 12368426 |
| SEJ INVEST OÜ (former name Genco Invest OÜ) | 14097581 |