Oylum Sinai Yatirimlar AS engages in the manufacturing of biscuit products. It offers plain biscuits, custard cream biscuits, wafers, chocolate bars, crackers, and family size products. The company was founded by Yener Bueyueknalbant, Nesibe Bueyueknalbant, Yesim Eminel, Beguem Bueyueknalbant, and Ramazan Pumak in 1969 and is headquartered in Kayseri, Turkey.