By 1895, he started his oil operation business. He had to return to the Ottoman Empire, but in 1896, Gulbenkian and his family fled the empire due to the Hamidian massacres of Armenians. They ended up in Egypt, where Gulbenkian met Alexander Mantashev, a prominent Armenian oil magnate and philanthropist. Mantashev introduced Gulbenkian to influential contacts in Cairo. These new acquaintances included Evelyn Baring, 1st Earl of Cromer. Still in his twenties, Gulbenkian moved to London in 1897 where he arranged deals in the oil business. He became a naturalised British citizen in 1902. In 1907, he helped arrange the merger of Royal Dutch Petroleum Company with "Shell" Transport and Trading Company Ltd. Gulbenkian emerged as a major shareholder of the newly formed company, Royal Dutch Shell. His policy of retaining five percent of the shares of the oil companies he developed earned him the nickname "Mr Five Per Cent".