Her first win came at Navan in April 2026, and jockey Joey Sheridan was refreshingly direct about what he had underneath him afterwards. Speaking on Racing TV, he said he knew he was riding the best horse in the race — not in a boastful way, but with the calm certainty of someone who had felt genuine quality through his hands. That kind of confidence from a jockey after a first win is worth paying attention to. Then, just over six weeks later, she went to Epsom Downs — one of the most demanding tracks in Britain, famous for its sharp turns and steep camber — and won again. That was just this week.
The horse is trained by Joseph Patrick O'Brien at Owning Hill in County Kilkenny, one of the most productive yards in Irish racing. O'Brien's team has sent out 171 winners already this season — a volume that tells you this is an operation that knows exactly what it is doing with good horses. Before Navan, O'Brien described Thundering On as exciting, noting she had run well on her comeback against a high-class rival before being caught close home. His plan was always to step her up into better company, and the Epsom win suggests she has answered that call emphatically.
At just three years old and with momentum firmly on her side, Thundering On looks like exactly the kind of horse whose best days are still ahead of her.
| Course | Races | Results | Last visited | Win rate |
|---|---|---|---|---|
| The Curragh Galloping |
2 | 1 second, 1 other | 21 Oct | 0% |
| Navan Galloping |
1 | 1 win | 25 Apr | 100% |
| Epsom Downs Undulating |
1 | 1 win | 5 Jun | 100% |
| Leopardstown Galloping |
1 | 1 second | 12 Apr | 0% |