The shares represent 0.0224% of Sopharma's capital, the pharmaceuticals manufacturer said in a bourse filing.
Following the transaction, Sopharma holds 9,108,837 own shares, or 6.76% of its own capital.
Sopharma's five-year share repurchase programme, launched in February 2018, targets up to 10% of the drug maker's share capital.
As at 11:00 CET on Tuesday, Sopharma shares traded at 3.47 levs, unchanged from their previous closing price on the Bulgarian Stock Exchange.
(1 euro = 1.95583 levs)