Juddmonte

Abdullah's participation in horse racing began as an owner in the late 1970s. Having bought his first yearlings in 1977, he secured his first win in May 1979 at Windsor. His first success in a British Classic Race came in 1980, when Known Fact won the 2,000 Guineas after first-past-the-post Nureyev was disqualified for interference.

In 1982, he bought two farms in Wargrave, Berkshire, and branched out into breeding racehorses. That year also saw the purchase of Ferrans Stud Farm near Kilcock in Ireland and a stud farm near Lexington in Kentucky. Juddmonte Farms Limited was incorporated in 1983 to run the business in England. Banstead Manor in the village of Cheveley near Newmarket was purchased in 1987 and became the headquarters of Juddmonte's European operations.

As the business expanded, there were further purchases of estates in England, Ireland and the United States, including Side Hill Stud in Newmarket, Eagle Lane Farm in Dullingham near Newmarket, Estcourt Estate in Gloucestershire, New Abbey Stud in Kilcullen, and two farms in Kentucky. The original Juddmonte farms in Wargrave and one of the Kentucky farms were sold in 2017, when Abdullah decided to reduce the size of his broodmare band.

Dancing Brave, bought by Juddmonte as a yearling, provided Abdullah with his second win in the 2,000 Guineas, and the first of his seven wins in the Prix de l'Arc de Triomphe. Warning, a son of Known Fact, was the first homebred Juddmonte horse to win at Group 1 level, when he won the Sussex Stakes in 1988. Two years later, Quest for Fame was Abdullah's first homebred British classic winner, when he won the Epsom Derby in 1990. Over the next ten years, Juddmonte homebred horses would complete the full set of British classics. Dansili, although never winning at the highest level, became an important sire at Banstead Manor Stud; his dam Hasili bred five Group/Grade 1 winners for Juddmonte. Juddmonte was at the height of its success in 2003, when it was leading owner in Britain and France, and winner of Eclipse Awards as top owner and top breeder in the US. Frankel, named after Bobby Frankel, one of Juddmonte's trainers in the US, appeared on the scene in 2010 and went on to remain unbeaten in fourteen starts, including ten Group 1 races, over three seasons. On his retirement from racing, he became a leading stallion at Banstead Manor. Frankel was followed by the mare Enable, who won eleven Group 1 races, including two Arc de Triomphes and a record three King George VI and Queen Elizabeth Stakes, before joining the band of Juddmonte broodmares.

In 2018, Juddmonte had a total of 800 horses, including stallions, mares, racehorses in training, and young stock. By 2021, it had bred 113 Group/Grade 1 winners, including 28 Classic winners. Following the death of Abdullah in January 2021, Juddmonte remained in the ownership of his family.