| A&D Pharma Bulgaria EAD | Abrotea Bulgaria AD |
| AES Solar Bulgaria EOOD | Aiko Multi Concept EOOD |
| Aktor Bulgaria EAD | Aktor SA |
| Alpine Bulgaria AD | Atlas Consulting FSK EOOD |
| Babcock Nuclear Services, Bulgaria branch | Bene AG |
| BIOWORKS Verfahrenstechnik GmbH | BNB |
| Borislav Boyanov & Co. Attorneys at Law | Bottling Company Gorna Bania Ltd |
| Brunata OOD | Bulgaria Air EAD |
| Bulmar ML OOD | Coca Cola HBC Bulgaria AD |
| Coeler Legal Consulting EOOD | Daira-M EOOD |
| Djingov, Gouginski, Kyutchukov & Velichkov Attorneys and Councellors at Law | Egis Representative Office in Bulgaria |
| ENPRO Consult Ltd | Fanuc FA Bulgaria Ltd. |
| FOT Ltd | Glavbolgarstroy AD |
| Glavbolgarstroy Holding AD | Glavbolgarstroy International EAD |
| Global Wind Power Bulgaria EOOD | Grawe Bulgaria |
| Imperial Tobacco Bulgaria EOOD | Kambourov & Partners Attorneys at Law |
| Kendy Ltd. | Kozloduy NPP EAD /Babcock Nuclear Services, Bulgaria branch |
| KPMG Bulgaria Ltd. | Maxima Bulgaria EOOD |
| McGregor & Partners | Medimag MS Ltd. |
| Ministry of Culture | Minstroy Holding JSC |
| Municipal Insurance Company JSC – OZK | National Revenue Agency |
| NEK EAD | Raiffeisen Energy & Environment GmbH |
| Schenker EOOD | Siemens EOOD |
| Soravia Bulgaria OOD | Terna S.A. – Bulgria branch |
| VGE-1 OOD | Vion Bulgaria Ltd. |
| Vitavel JSC | Votan EOOD |
| Xella Bulgaria EOOD | HUMANIC OOD |
| WorleyParsons | Baker Tilly Klitou and Partners OOD |
| IEC Bulgaria | Blizoo |
| Novartis | Raiffeisenbank Bulgaria |
| HIT |
