''Geostroy Engineering'' Ltd
''Inertni Materiali-Yambol'' JSC
''Kalibrovani stomani'' JSC
''Hydrosystem'' Ltd
''Sinter-M'' JSC
Bonoil
Bonfood
Agrofarm
Hotel ''Diana Palace''
GEOMEKS
ТБ ИСА
''SILA'' Jsc. - Yambol
''Strandja - MP'' Ltd.