St. Simon retired to stud in 1886 and sired 423 live foals, who between them won 571 races and more than half a million pounds in stake-money from 1889 through the first decade of the twentieth century. Among his progeny were 10 English Classic winners who won 17 classic races between them. The 10 Classic winners is the third-highest total of all time, behind
Stockwell and
Sadler's Wells, both with 12. The 17 Classic race wins by his offspring ties him for the all-time record with Stockwell. His classic winners were: Memoir, Semolina,
La Fleche (horse), Mrs Butterwick, Amiable, Persimmon, St Frusquin, Diamond Jubilee, La Roche, and Winifreda. The latter three between them swept all five English Classics of 1900 — the only times a sire has accomplished this feat. • 1887:
Memoir (
Epsom Oaks,
St Leger) • 1887:
Semolina (
1,000 Guineas Stakes) • 1887: Signorina (champion two-year-old filly) • 1888: Simonian (
Leading sire in France twice) • 1889:
La Fleche (Fillies' Triple Crown, Ascot Gold Cup, Champion Stakes, Cambridgeshire Handicap, 2nd Epsom Derby) • 1890:
Mrs Butterwick (Epsom Oaks) • 1890: Soult (NZ Champion Sire five times) • 1891:
Amiable (1,000 Guineas, Epsom Oaks) • 1891: Florizel II (
St. James's Palace Stakes,
Goodwood Cup, Jockey Club Cup, leading broodmare sire) • 1893:
Persimmon (Epsom Derby, St.Leger, Ascot Gold Cup, Champion Sire four times) • 1893:
St. Frusquin (2,000 Guineas, Eclipse Stakes, 2nd Epsom Derby, Champion Sire twice) • 1896:
Desmond (Champion Sire) • 1897:
Diamond Jubilee (Triple Crown, Eclipse Stakes, Argentina Champion Sire four times) • 1897:
La Roche (Epsom Oaks) • 1897:
Winifreda (1,000 Guineas) • 1898: Pietermaritzburg (
Jockey Club Stakes, Argentina Champion Sire) • 1898:
William the Third (Ascot Gold Cup, Doncaster Cup) • 1900: Chaucer (two time
leading broodmare sire.
Selene, the dam of
Hyperion, was by Chaucer, as was Scapa Flow, dam of
Pharos and
Fairway) • 1900:
Rabelais (Leading sire in France three times) St. Simon was also the leading broodmare sire in Great Britain and Ireland six times. As a broodmare sire, his notable progeny include: • Festa, dam of Febula, Fels and Fervor in Germany • Ondulee, dam of highly influential broodmare
Frizette • Roquebrune, dam of
Rock Sand • Signorina, dam of Signorino,
Signorinetta • Simonath, dam of Flamboyant and granddam of
Papyrus St. Simon's sire line has continued to modern times through Rabelais down to
Ribot, However, St. Simon is a pervasive influence in the breed through other lines of descent. For example,
Nearco, inbred 5 x 4 × 4 × 5 to St. Simon, would found the most dominant Thoroughbred sire-line of the following century. Nearco's grandson Northern Dancer, another enormously influential sire, has fifteen crosses to St. Simon in the first eight generations of his pedigree. Pedigree expert Anne Peters refers to his bloodline as "one of the most widespread and omnipresent in the Thoroughbred gene pool today." St. Simon died when he was 27 years old and his skeleton belongs to the
British Museum of Natural History. ==Sire line tree==