| Assessor | |
|---|---|
| Sire | Niniski |
| Grandsire | Nijinsky |
| Dam | Dingle Bay |
| Damsire | Petingo |
| Sex | Stallion |
| Foaled | 1 March 1989[1] |
| Died | 2012 (aged 22–23) |
| Country | Ireland |
| Colour | Bay |
| Breeder | Airlie Stud |
| Owner | Bjorn Nielsen Sultan Al Kabeer |
| Trainer | Richard Hannon Sr. |
| Record | 32: 8-9-6 |
| Earnings | £432,364 |
| Major wins | |
| Lingfield Derby Trial (1992) Prix Royal-Oak (1992) Yorkshire Cup (1993) Doncaster Cup (1993) Prix du Cadran (1993) St Leger Italiano (1995) | |
Assessor (1 March 1989 – 2012) was an Irish-bred, British-trained Thoroughbred racehorse and sire best known for his performances over extended distances. After winning two minor races as a juvenile developed into a high-class stayer in 1992, recording wins in the Lingfield Derby Trial and Prix Royal-Oak. He reached his peak as a four-year-old in 1993 when he won the Yorkshire Cup, Doncaster Cup and Prix du Cadran. He suffered from training problems thereafter but recorded another big win when he took the St Leger Italiano in 1995. After his retirement from racing he became a successful sire of National Hunt horses.