About us

Demi O’Byrne

Demi has purchased numerous Champions in Europe, USA and Australia along with over 70 individual Group/Grade 1 winners. These include six time Group 1 winner Montjeu, five Epsom Derby winners including Camelot and Dr Devious, Kentucky Derby and Belmont Stakes winner Thunder Gulch, Kentucky Oaks and Belmont stakes winner Rags to Riches and Champion Australian Racemare Atlantic Jewel to name just a few.

A qualified veterinary surgeon Demi attended champions such as Alleged, El Gran Senor, Storm Bird and Nijinsky, during his time as vet to Vincent O’Brien at Ballydoyle.

Seán Grassick

Seán grew up in the racing and bloodstock industry. He has worked alongside Demi at sales in Europe and the USA since 2016 and started buying in his own name in 2018.

Seán has also gained a wealth of experience from a wide range of areas within the bloodstock industry. He has worked for Coolmore Stud, Newtown Stud, Goffs Bloodstock Sales and trainers Wesley Ward and Michael Grassick.