According to the association, the gelding amassed over €230,000 in earnings during his career. Ardcolum Duke was always owned by his breeder, Joe Flynn. Originally, Ardcolum Duke came to Billy Twomey's home for a four-week trial period, but then traveled the world with him. He was primarily a horse for speed events up to, but not limited to, 1.50m. From 2014 to 2018, he achieved no fewer than twenty-four victories on the international circuit.

The grey notably won the 1.60m Grand Prix at the Irish CSI 3* in Millstreet in 2015 and made a name for himself on numerous occasions at the CSIO 5* in Dublin. There, he twice won the Speed Derby and also a points accumulation event with a joker at 1.60m. "I was very proud of him," recalls his breeder and owner.

Ardcolum Duke will be remembered as a remarkable horse that brought much pride and success not only to his rider but also to his breeder.