Sevil Sabanci Sabanci was born in Turkey. Newcomer to the list, Sevil Sabanci Sabanci, is a board member of the family's Sabanci Holding whose value has skyrocketed this year. The group's stake in Akbank is worth 21% more over the past twelve months. The trained equestrian owns stables in Istabul. She is joined by her sister, and new billionaire, Dilek Sabanci, on the billionaires list this year, along with other members of the family.