Leonnatus Anteas (foaled March 20, 2004 in Ontario) is a Canadian Champion Thoroughbred racehorse.
Owned by the Steve Stavro estate, the grandson of Storm Cat was sold by Denali Stud as agents for Josham Farms of Ontario at the September 2005 Keeneland Sales.
Racing in Canada at age two, Leonnatus Anteas won all three races he entered and was voted the 2006 Sovereign Award for Champion 2-Year-Old Male Horse.
A winterbook favorite for the Queen's Plate, two days before the race he had to be scratched due to an infection in his pastern.
The three-year-old colt made his next start in the September 15 Super Derby at Louisiana Downs in Bossier City, Louisiana, finishing fourth.