Ulker sells out 19% stake in Datateknik to Yildiz Holding. Ulker Holding, one of the largest food companies, announced that it sold its entire stake in Datateknik to Yildiz Holding. A statement sent to the ISE by Ulker said that Yildiz Holding would pay USD 4mn for Ulker’s 19% stake in Datateknik, which produces Exper brand computers. Ulker sold its stake in Datateknik as it plans to be focused more on its core food business and withdraw from other sectors that are unrelated with food.