Understanding that top talent is essential to running a diverse group, he also created a recruitment division, Humanitas. Revenues for 1999 at privately held Dogus Group hit $5.7 billion. In May 2000, he instituted centralized back-office operations for Dogus' multiple banks and is doing the same for its auto dealerships. To its banking business, Şahenk added leasing, insurance and credit card cash-back schemes like those of Discover Card in the United States - financial services still uncommon in Turkey at the time.
The net worth of the Şahenk conglomerate is around USD$ 2.5 billion, with a turnover for 2005 of USD$6 billion, employing about 18,000 people. He relinquished some control of the Garanti Bank, selling a quarter of the country's third largest bank to General Electric for $1.6 billion in 2004, which was regarded as an important step towards greater liberalization in the Turkish banking sector, which had been severely affected by the 2001 economic crisis. He also runs Turkish media properties capturing more than 10 percent of country's advertising market. Bankrolled Gallipoli, a movie about the seminal Turkish military battle against the Allied offensive. On January 28, 2006 Şahenk threw a reception during the World Economic Forum meeting in Davos, Switzerland, which was attended by Recep Tayyip Erdoğan, prime minister of Turkey.
He is married to a American woman Diana and they have a daughter named Defne. Also his cousin Melis Sahenk is a famous designer who won various competitons in Madrid and studying in Universidad Complutense de Madrid