| Company name | Reg. code |
|---|---|
| ESSI OÜ | 12528195 |
| ESSI AGRO OÜ | 12090445 |
| ESSI TALU OÜ | 11310459 |
| ESSA OÜ kustutatud | 14153339 |
| ESS.O.ESS OÜ | 16004359 |
| ESS.O.ESS KV OÜ | 16158134 |
| ESSE INVEST OÜ | 10706925 |
| ESSA TECHNOPARK OÜ | 12356334 |
| MALVA-ESSU OÜ | 10161721 |
| ESSY PREMIUM OÜ kustutatud | 12539655 |
| ESSE HALDUS OÜ kustutatud (former name Acc Infra OÜ) | 10422080 |
| ESSE ILUTUBA OÜ | 16143500 |
| ESSA ASI OÜ | 14966195 |
| ESSE INDUSTRY OÜ kustutatud (former name WireTeam OÜ) | 12397155 |
| ERRE2ESSE OÜ kustutatud | 12733512 |
| ESSA TEENUSED OÜ | 17315920 |
| ESSE HOUSE OÜ | 16543335 |
| IN ESSE OÜ (former name Organic Sweets OÜ) | 14382689 |
| ESSU HOOLDEKODU OÜ kustutatud | 12836962 |
| ESS KINNISVARA OÜ | 10088800 |
| ESS SOFTWARE OÜ | 17282959 |
| ESS GLOBAL TRADE OÜ | 14609288 |
| SOLOTEKS TRANS OÜ kustutatud (former name Esse Transport OÜ) | 12103596 |
| ESSIDE INVEST OÜ | 14216459 |
| ESSITY ESTONIA OÜ (former name OÜ SCA Hygiene Products) | 11019563 |
| ACC INFRA OÜ kustutatud (former name Esse Transprt OÜ) | 12455547 |
| VÄRSKA SÜDAMEKODU OÜ (former name AdPrint Group OÜ) | 12644292 |
| MESSI OÜ | 16826618 |
| ESFI OÜ (former name Tharapita Natural OÜ) | 14307430 |
| ELSI OÜ kustutatud | 10255400 |
| ERSI OÜ kustutatud | 10131393 |
| ETSI OÜ | 14130479 |
| FESSI OÜ | 16522485 |
| SESSI OÜ | 14402529 |
| EISI OÜ (former name Aktsiaselts EISI) | 10088556 |
| ENSI OÜ | 11418659 |
| BESSI OÜ | 10347555 |
| ESSCARLAB OÜ (former name Liikluslab OÜ) | 11025150 |
| SESI GRUPP OÜ | 16036394 |
| OSSI PÕLD OÜ | 12145502 |
| ASSI FARMID OÜ | 11616477 |
| SESI STUUDIO OÜ | 16957734 |
| ELSI INFRA OÜ kustutatud | 14623822 |
| ESTI-USO OÜ kustutatud | 12394487 |
| ESTI SAPEC OÜ | 14593021 |
| ESMI TOIDUKAUBAD OÜ kustutatud | 12845085 |
| EPSI TECHNOLOGIES OÜ | 16692313 |
| ESEI SERVICES OÜ (former name ESEI MOTORS OÜ) | 14192693 |
| ERSI MÖÖBEL OÜ kustutatud | 12363423 |
| ESTI COMMERCE OÜ | 12109736 |