Özyeğin led Yapı ve Kredi Bankası until 1987, when he decided to establish his own bank, the Finansbank at the age of 43. He expanded it to a bank with more than 200 branches operating in nine countries out of Turkey, mostly in Europe. He later founded several Finance companies and brought them under the Holding Fiba, which has around 8,500 employees in 20 companies. Over the next few years, he invested in high-demand industries such as real estate, Energy and Retail, building condominiums and shopping centers across the main domestic Business districts. In 1996, he entered the Retail Business purchasing the supermarket chains Gima, Endi, Spar and Greens. Furthermore, Özyeğin signed a franchising contract with the British Retail chain Marks & Spencer, and then purchased also the Sakura Bank.