Workforce (foaled 2007) is a British Thoroughbred racehorse. In a career that lasted from September 2009 until October 2011, he ran nine times and won four races. In 2010 he won the 2010 Epsom Derby and Prix de l'Arc de Triomphe, ridden by Ryan Moore. He won once from four races in 2011 before being retired to stand as a breeding stallion in Japan.