A player hits the finish line at WTC's Ironman 70.3 Zell am See-Kaprun in Salzburg, Austria, August 26, 2012. [Photo /IC]

World Triathlon Corp (WTC)

Date: August 26, 2015

Country: US

Amount: $650 million

Headquartered in Florida, WTC is the world's largest operator of Ironman events and the most well-known Ironman brand, accounting for 91 percent of the global market share of long-distance triathlon events.