Mustafa Koc, chairman of Turkey's biggest company Koc Holding, died on Thursday after suffering from a heart attack.
The death announcement was made by Vehbi Koc Foundation American Hospital which is owned by Koc Holding.
According to previous statement issued by Beykoz State Hospital, Koc experienced cardiovascular problems during morning exercise. He received first aid from his security guard and his personal trainer. Later, he was hospitalised in Beykoz State Hospital.
Following the first treatment, Koc was transferred to American Hospital by helicopter.
Mustafa Koc is the eldest son of billionaire Mustafa Rahmi Koc, and since 2003, he has been chairman of the board of the family's Koc Holding which operates in the automotive sector, durable goods, food, retailing, energy, financial services, tourism, construction and IT industries.
According to Fortune Global, Koc Holding – which has 113 companies, 90,000 employees, and 14,000 dealers – is the 341st largest company in the world, and the only Turkish company on the Fortune 500 list.