Donev bought 105 shares in Sopharma through a deal priced at 3.14 levs ($1.87/1.60 euro) per share, the drug manufacturer said in a bourse filing.
Donev has directly acquired a total of 148,239 shares in Sopharma, or 0.11% interest, so far this month.
Indirectly, Donev is the biggest shareholder in Sopharma, as he controls a 25.67% stake through Donev Investments Holding. Donev is also a major shareholder in Sopharma's second-biggest shareholder Telecomplect Invest, which controls 20.68% interest in Sopharma.
As at 11:30 CET on Thursday Sopharma's shares traded unchnaged at 3.14 levs on the Bulgarian Stock Exchange.
(1 euro = 1.95583 levs)