Onassis Heiress Acquires Show Jumper Cossinelle
Athina Onassis has bought the Holsteiner show jumper Cossinelle for a reported €1.2 million, with the ownership change registered with the FEI.
Updated on Nov. 8, 2026 in Equestrian
Athina Onassis, granddaughter of Aristotle Onassis, has acquired the Holsteiner show jumper Cossinelle for a reported €1.2 million. The ownership change was registered with the FEI on 2 October 2026.
Why it matters
The transfer brings a horse with 128 competition starts and two career wins to a new owner with a long-standing riding background. It also signals renewed interest in the international show-jumping market at the top end of horse values.
The reported €1.2 million price is tied to Cossinelle's record of 128 competition starts and two wins. Athina Onassis's future competition plans for the horse have not been made public.
The players
Athina Onassis
Granddaughter of shipping magnate Aristotle Onassis, she has ridden since childhood and has competed internationally in show jumping.
Cossinelle
A Holsteiner show jumper with 128 competition starts and two career wins, bred in the German tradition of the Holstein breed.
The details
The acquisition was reported by a Greek television broadcast and picked up by Harper's Bazaar Greece. The previous owner was a Ukrainian businessman, and the change of ownership was recorded in FEI records.
Timeline
2 October 2026: Ownership change of Cossinelle registered with the FEI.
8 November 2026: Article reporting the acquisition published.
Season Trajectory
Ownership changes registered with the FEI are a routine part of how competition horses move between riders and owners on the international circuit. The acquisition of a horse with Cossinelle's competition record reflects ongoing demand for experienced show jumpers at the top level.
Readers following show jumping should watch the FEI record for any future start listings for Cossinelle under its new ownership. Any competition entries will show the horse's return to the circuit.
The takeaway
Ownership changes in equestrian sport are formally recorded with the FEI, so the registry is the most reliable place to confirm a horse's current owner. Tracking those records helps readers follow where top competition horses end up.
Further reading
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