He showed great promise as a juvenile in 2010 when he was unbeaten in two races including the Group 3 Prix Thomas Bryon but in the following year he failed to win or place in four starts.
[4] On 7 October the colt was stepped up in class to contest the Group 3 Prix Thomas Bryon over the same distance on heavy ground at Saint-Cloud Racecourse.
[7] In June he was stepped back up in class for the Group 2 Grand Prix de Chantilly and was in the first two throughout before being beaten three quarters of a length by the British-trained Aiken with the favourite Dunaden in third.
After a two-month break he was made odds-on favourite for the Prix Gontaut-Biron at Deauville but was outpaced in the closing stages and came home fifth of the seven runners behind Don Bosco.
[8] On his final run of the season he started second favourite for the Prix Dollar at Longchamp in October but came home sixth, more than eleven lengths behind the winner Cirrus des Aigles.
After racing in third place he made rapid progress in the straight, caught the front-running Don Bosco close to the finish and won by three quarters of a length.
[10][11] In June Maxios raced outside France for the first time when he was sent to Royal Ascot to contest the Prince of Wales's Stakes and came home sixth of the eleven runners behind Al Kazeem.
Maxios went to the front when Sage Melody faded 400 metres from the finish and was never seriously challenged thereafter, coming home five lengths clear of Olympic Glory.