Ivan Petrov Cholakov

Optix AD engages in manufacturing of special optical devices and systems. Its activities include design and manufacture of optical, opto-mechanical and opto-electronic assemblies and devices for military applications. The company was founded in 1998 and is headquartered in Panagyurishte, Bulgaria.

Bulgarian Telecommunications Co. EAD engages in the provision of telecommunication services under the brand name VIVACOM. It operates through Fixed Line of Business and Mobile Line Of Business segments. The Fixed Line of Business segment offers voice and data services over the fixed network. The Mobile Line of Business segment focuses in mobile services that consists GSM, UMTS, and LTE Standards. The company was founded in 1992 and is headquartered in Sofia, Bulgaria.