| Company name | Reg. code |
|---|---|
| ESPRON OÜ | 12923520 |
| ESPROD OÜ | 11520197 |
| ESPOON PASSIIVIRAKENTAJAT OÜ kustutatud | 12652506 |
| ESPOON RAKENNUS- JA TIMANTTITYÖT OÜ kustutatud | 12641247 |
| ESPERAN OÜ | 10711179 |
| ESPROUT OÜ kustutatud | 14359822 |
| ESPRII OÜ | 12566284 |
| ESPLAN OÜ | 10458912 |
| ESPONN AGENCY OÜ | 17172001 |
| ESPORT MANAGEMENT OÜ | 14840703 |
| BEL ESPRIT OÜ kustutatud | 12476920 |
| MGO ESPORT OÜ kustutatud | 14045532 |
| ESPRII ELEMENT OÜ | 16924551 |
| ESPORT MEDIA GROUP OÜ | 14749977 |
| ESPORT MEDIA GROUP OÜ kustutatud | 12442105 |
| ESTRON OÜ | 17290373 |
| ESTRON ETEK OÜ kustutatud | 14396183 |
| ESTRON PRO OÜ | 10527665 |
| ESTRON HOLDING OÜ (former name Estron Holding UÜ) | 14715932 |
| ESTRON TEENUSED OÜ | 12797475 |
| ESTRON DEMONTAGE OÜ (former name Hakon2 OÜ) | 14323712 |
| ESRON GROUP OÜ (former name Esron Group UÜ) | 16771320 |
| ESRON HALDUS OÜ (former name Esron Haldus UÜ) | 16656174 |
| ASPIRON OÜ | 10335776 |
| ELTRON OÜ (former name Aktsiaselts Eltron) | 10180724 |
| ESCROW OÜ | 12880615 |
| ENORON OÜ kustutatud | 14341897 |
| ESTCON OÜ | 10111700 |
| EPIRON OÜ (former name Lux Credit OÜ) | 12689351 |
| ESBPROD OÜ kustutatud | 14539553 |
| DESIRON OÜ | 11591688 |
| AMPRON OÜ | 12357173 |
| DESPRO OÜ | 14520230 |
| ENDRON OÜ | 11187757 |
| EMIRON OÜ | 11524172 |
| ESTERON OÜ kustutatud | 11975590 |
| ELPROG OÜ | 16438158 |
| ERPSON OÜ | 11505134 |
| ESCROC OÜ kustutatud | 12173770 |
| ERPCON OÜ | 16322823 |
| ESPO ARENDUS OÜ (former name ESPO Materials OÜ) | 16430458 |
| COSMETIC LABSOLUTIONS OÜ (former name ESPREE BALTIC OÜ) | 12929132 |
| EMPROS CONSULTING OÜ | 16046790 |
| ASTRON ESTONIA OÜ | 14459162 |
| ASPERON TECHNOLOGIES OÜ | 16272114 |
| ASTRON EESTI OÜ | 14667682 |
| ELERON REKLAAM OÜ | 11422365 |
| EMERON TEENUS OÜ (former name Emeron Teenus UÜ) | 16654034 |
| ESTERON INVEST OÜ kustutatud | 11027568 |
| ENERON PROJEKT OÜ | 11610463 |