The Saudi Arabian prince has enjoyed success in all the English Classics.
The first of his eight Classic wins came with Known Fact in the 2,000 Guineas in 1980 but his most famous horse to date has been Dancing Brave, who took the same race in 1986, before going to win the Eclipse, the King George VI and Queen Elizabeth Diamond Stakes and the Arc in the same season.
Khalid Abdullah, whose British string is managed by Teddy Beckett, also has significant bloodstock interest in the shape of the Juddmonte Stud.
Colours: Green, pink sash and cap, white sleeves
The Aga Khan is a spiritual leader who owned the infamous Shergar.
The Aga Khan with his most famous horse, Shergar
Four of his five Classic wins have come in the Derby, including the most recent, Sinndar in 2000, a year the Aga Khan was also Britain's leading owner (a feat he also achieved in 1981).
His filly Aliysa won the 1989 Oaks but was disqualified after testing positive for a banned substance - that led to a dispute with the Jockey Club after which the Aga Khan took his string away from the UK.
However, his horses are now back running in Britain.
Colours: Green, red epaulets
Sir Neil Westbrook
Owner-breeder, whose 40 years of dedication to Flat was rewarded with his first Classic victory in 2002 when Bollin Eric won the St Leger.
The Westbrooks are a famous Yorkshire family although Sir Neil's stud farm is based in Cheshire.
His horses are easily distinguished as their names are always prefixed with Bollin.
The Bollin is a river that runs through the Westbrook farm at Prestbury in Cheshire, and the horses are named after members of the family.
Colours: Red, white sleeves, black and yellow quartered cap
Highclere was set up in 1992 and has become one of the leading syndication businesses in British racing.
Highclere's light blue silks are a familiar sight on the racecourse
The organisation offers a range of syndicates, which own either one, two or three horses - most syndicates have between 10 and 30 shares, with costs ranging from about £10,000 to £40,000 per share.
Harry Herbert is the public face of the club with a wide range of trainers used to train the horses.
The many successful horses to have been owned by Highclere include 2000 Irish Oaks winner Petrushka and 2002 St Leger runner-up, Highest.
Colours: Light blue, dark blue armlets, dark blue cap
Elite Racing Club
Elite is at the other end of the syndicate spectrum from Highclere and aims to give the ordinary punter a taste of racehorse ownership.
Soviet Song wins in the colours of the Elite Racing Club
There are 15,000 members and each pays less than £200 a year for a stake in the horses belonging to the club.
They also get a weekly newsletter with stable visits and racecourse trips also organised.
In the 10 years since the club was set up, it has enjoyed over 150 winners.
In 2002, there were 20 horses in training and five brood mares.
And in a fairytale day at Ascot in September, Soviet Song won the Group One Fillies Mile to claim the £116,000 first prize.
Colours: White, large black spots, black cap