| Company name | Reg. code |
|---|---|
| SIA "DPA" (former name SIA) | 40003351675 |
| SIA "DPA Group" (former name SIA) | 40103197092 |
| DPA SOLUTIONS SIA | 65552444 |
| SIA „DBA Competence Center“ | 40103227895 |
| DIA DESIGN OÜ | 10189858 |
| DIA PARTNERS OÜ | 16665931 |
| MEIO-DIA OÜ kustutatud | 12840863 |
| DIA STYLE OÜ kustutatud | 12498599 |
| DIA GRANDE OÜ | 17038277 |
| DIA-AUTODIAGNOSTIKA OÜ | 10242951 |
| DIA BRILLANTE OÜ | 14281126 |
| DIA TRANS OÜ kustutatud | 12330493 |
| DIA JUVELAN OÜ kustutatud | 10821100 |
| Dia Süsteemi Arhitektuuribüroo AS | 1171070 |
| CONTAS EM DIA OÜ kustutatud | 16323076 |
| DIA PROJECT MANAGEMENT OÜ | 11051207 |
| DEAD SEA MEDICAL SPA OÜ kustutatud | 12390354 |
| SEA OF SPA EESTI OÜ | 11097103 |
| Affi Consulting SpA (former name Flg Consultores Spa) | 77117539-2 |
| ARUBAUM TRANS OÜ (former name NÖPS SPA OÜ) | 12683337 |
| ASTRANCE OÜ kustutatud (former name Celtica SPA Osaühing) | 12228530 |
| NORDSWIM VIIMSI MTÜ (former name Mittetulundusühing SPA Viimsi Tervis) | 80215358 |
| A BUILDING GROUP OÜ kustutatud (former name Peetrimõisa SPA hotell OÜ) | 14166276 |
| MIRENDIAL GROUP OÜ (former name Mi Dia Beauty OÜ) | 16034372 |
| KADAKA KONVERENTSID OÜ (former name IMA SPA Consulting OÜ) | 12238534 |
| SKILLMEISTER OÜ kustutatud (former name Rusalka Spa & Beauty OÜ) | 16292571 |
| HM CONSULT OÜ kustutatud (former name Exotic SPA OÜ) | 12862847 |