| Name | Color | Sex | Year of birth | Microchip | Sire | Dam | Breed | Breeder |
|---|---|---|---|---|---|---|---|---|
| What a Summer | grey | f | 1973 | What Luck | Summer Classic | Thoroughbred | USA | |
| What a Surprise | f | 1968 | Wise Margin | Militant Miss | Thoroughbred | USA | ||
| What A Treat | d.-bay | f | 1962 | Tudor Minstrel | Rare Treat | Thoroughbred | USA | |
| What an Act | chestnut | f | 1979 | An Act | Warmed Bottom | Thoroughbred | USA | |
| What Charisma | chestnut | f | 1974 | Raise a Native | Yellow Train | Thoroughbred | USA | |
| What Luck | d.-bay | c | 1967 | Bold Ruler | Irish Jay | Thoroughbred | USA | |
| What Majesty | chestnut | f | 1978 | Ramsinga | Majestic Hostess | Thoroughbred | USA | |
| What Will Be | bay | f | 2003 | Anees | Che Sara Sara | Thoroughbred | USA | |
| Whata Belle | f | 1979 | Honest Pleasure | Quilloquick | Thoroughbred | USA | ||
| Whatamiss | chestnut | f | 1993 | Miswaki | Circular | Thoroughbred | USA |