Mehmet Ömer Koç (born 24 March 1962) is a Turkish businessman, art collector, and chairman of Koç Holding. In 2013 Forbes estimated his net worth at US$1.1 billion.^[1]

Koç was born on 24 March 1962 in Ankara, Turkey. A third generation of the Koç family, he is the second son of Rahmi Koç and grandson of Vehbi Koç, founder of Koç Holding.^[2] He graduated from Robert College in Istanbul, attended Millfield School in England, studied at Georgetown University before graduating from Columbia College in 1985 with a bachelor's degree in Ancient Greek. He obtained his MBA from Columbia Business School in 1989.^[3][4]

Koç began his business career working at Kofisa Trading Company in Geneva, Switzerland. He joined the family business in 1992 as a finance coordinator and was vice president and president of the Energy Group. He became a member of the board of directors in 2004 and vice chairman in 2008.^[3] Shortly after his brother, Mustafa Vehbi Koç, died after a heart attack in 2016, Koç was elected chairman of Koç Holding, Turkey's largest company, in 2016.^[5] The company's output contributes nearly 10 percent of Turkey's total GDP and is the only Turkish company on the Fortune 500 list.^[5] He is also chairman of Tüpraş, the largest oil refiner and industrial company in the country.^[6][7][8] He is chairman of the board of trustees of Koç University.^[9] As of January 2018, Koc owns 0.74% of Koç Holding.^[10] He sits on the steering committee of the Bilderberg meeting.^[11]

Not much of Koç's personal life is known as he shies away from the public and media.^[4] He lives in London and is known for his fondness for both contemporary and classical art.^{[4][12][13][14]} He is a sponsor of the Istanbul Biennial and Turkey's pavilion at the Venice Biennale.^[15] He established the nonprofit art space Arter in 2010.^[16][14] For his sponsorship of Turkey's contemporary art scene, he was named by ArtReview as of the "100 Most influential people in 2016 in the contemporary artworld."^[15] He also maintains an interest in Ottoman art, and has a large Iznik pottery collection.^[17] He is reported to have the finest private collection of objects and books about Ottoman history in the world.^[16][18][19]