- ACCO SYSTEMS – Michigan USA
- AFT GmbH & Co KG Germany
- AGCO A/S Denmark
- BROCKHAUSEN ENGINEERING – Beckum Germany
- CMP SpA Italy
- DEVNYA CEMENT AD Bulgaria
- DURR AUTOMOTION GmbH Germany
- HMF A/S Denmark
- Laverda Italy
- MARITCA EAST – 2 Bulgaria
- PLEVENSKI CEMENT AD Bulgaria
- ROVO CHEAR – Losburg Germany
- SIEMENS AG – Offenbach
- SIEMENS AG Germany
- SOLVEY SODY S.A. – Devnya Bulgaria
- UNION MINIERE Pridop Copper AD Bulgaria
- ZLATNA PANEGA AD Bulgaria