Thanks Be, who provided Charlie Fellowes with his first Royal Ascot winner last month, is leaving the Newmarket trainer to continue her racing career in the United States.
The three-year-old filly was a maiden after four starts when she belied her odds of 33-1 to beat 26 rivals in the Sandringham Handicap.
“She’s flying to New York to continue her racing career in America,” said Fellowes.
“She’s hopefully going to have a long and successful career over there. She’s a very talented and tough filly.
“She gave me the greatest day of my training career to date and I will never forget her.
“She will suit their style of racing and I hope she will be a real success for her new owners.”
The victory caused controversy as her jockey Hayley Turner was hit with a nine-day suspension and a £1,600 fine for using her whip above the permitted level. She is only the second woman in history to ride a winner at the Royal meeting.