| Clarissimus | |
|---|---|
| Sire | Radium |
| Grandsire | Bend Or |
| Dam | Quintessence |
| Damsire | St Frusquin |
| Sex | Stallion |
| Foaled | 1913[1] |
| Country | United Kingdom |
| Colour | Chestnut |
| Breeder | Evelyn Boscawen, 7th Viscount Falmouth |
| Owner | 7th Viscount Falmouth |
| Trainer | William Waugh |
| Record | 6: 3-2-0 |
| Major wins | |
| Clearwell Stakes (1915) 2000 Guineas (1916) Champion Stakes (1916) | |
Clarissimus (1913 – 6 July 1933) was a British Thoroughbred racehorse and sire. He was highly rated as a juvenile and showed promise by winning the Clearwell Stakes on the second of his two starts. He recorded his biggest when winning the 2000 Guineas on his debut as a three-year-old. Clarissimus went on to finish second in the Newmarket Stakes and a substitute St Leger before winning the Champion Stakes on his final appearance. After his retirement from racing he became a breeding stallion and had considerable influence as a sire of broodmares.