The gray raced under the ownership of Tommy and Rochelle Quinn as a juvenile and the partnership known as Murry Rose Bloodstock in 2004, and a 90-percent interest was sold to the Swiss-Italian banker Jean-Pierre Regli in October 2004. However, deals to secure a place for Grey Swallow at stud foundered when Regli's company Langbar International became involved in a Serious Fraud Office investigation. Weld's mother Greta retains her 10-percent stake as the breeder.