BC Partners estimates it will make more than four times its investment on the sale of the discount division of Turkish supermarket operator Migros, which the private equity firm bought in 2008 in the country’s biggest buyout.

The UK buyout firm is in discussions with Istanbul-based financial services company Gözde Finansal Hizmetler to sell Sok, a discount retailer unit of Migros, after receiving a "serious approach", according to a source close to the situation.