At the end of November, IHB held 6,308,580 own shares, the company said in a bourse filing.
The company's capital is divided into 107.4 million shares.
IHB's five-year share buyback programme, adopted last year, envisages the repurchase of own shares at a price of between 0.70 levs and 1.20 levs apiece.
IHB shares closed at 1.0 levs on the Bulgarian Stock Exchange on Friday.
(1 euro = 1.95583 levs)