April 25 (SeeNews) - A total of 4,043,510 shares in Bosnian health tourism company ZTC Banja Vrucica [BANJ:BVRU-R-A], equal to a 12% stake, traded in a block transaction worth 5.9 million marka ($3.2 million/3 million euro) on Thursday, Banja Luka bourse data showed.