Answer
Trankov has won six Grand Prix series events. The Grand Prix series is an annual figure skating competition held by the International Skating Union (ISU). It consists of six events held in different countries around the world. Trankov's six victories have come at the following events: 2010 Skate Canada International, 2010 NHK Trophy, 2011 Cup of China, 2012 Skate America, 2013 NHK Trophy, and 2014 Skate Canada International.