Pierre Wertheimer (January 8, 1888 – April 24, 1965) was a French businessman.
In October 1910, Pierre Wertheimer married Germaine Revel, a daughter of a stockbroker and a member of the Lazard family of investment bankers.
In 1924, Pierre Wertheimer and his brother Paul became Coco Chanel's partners in the House of Chanel perfume business. Two years before, in 1922, the Chanel No. 5 perfume had been introduced and Ms Chanel needed the Wertheimers' extensive experience in commerce, their American business connections, and their capital to fully develop and market the product. During their partnership, Wertheimer owned 70% of the Chanel perfume company. Chanel owned 10% and Chanel's friend, Théophile Bader, owned the remaining 20%.
Thoroughbred horse racing
Pierre Wertheimer was also a leading racehorse owner. In 1949 he hired the then 24-year-old Alec Head to train his horses. The Werheimer/Head association in racing would continue through family members until 2006.
Wertheimer's horses won numerous important races in France and the United Kingdom. Among the notable horses he owned was Epinard, called a racing legend  by the French racing authority, France Galop.
Selected Group One race wins:
- 1,000 Guineas : (1935)
- Epsom Derby : (1956)
- Prix d'Astarté : Eleda (1934), Djanet (1956)
- Prix Maurice de Gheest : Sonny Boy (1933), Djanet (1956), Midget (1957), Tomahawk (1959)
- Prix du Jockey Club : Roi Lear (1973)
- Poule d'Essai des Poulains : Riverman (1972)
- Prix d'Ispahan : Riverman (1972)
The racing stable and the House of Chanel was inherited by his son Jacques Wertheimer who continued to be a force in French racing and who expanded the House of Chanel even further. On Jacques' death, the business went to his sons, Gerard and Alain Wertheimer.
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