April 15 (SeeNews) - The shareholders of Slovenia's Pivovarna Union have approved selling 464,390 ordinary shares of retailer Mercator [LJE:MELR], representing a stake of 12.33%, to Croatian privately-held concern Agrokor at a price of 86 euro ($118.7) apiece, Pivovarna Union's majority owner, Pivovarna Lasko, said on Tuesday.