E va Maria Bucher-Haefner is a Swiss billionaire heiress whose fortune is derived from two major sources created by her late father, the legendary and highly discreet entrepreneur Walter Haefner. Her father founded AMAG, which grew to become Switzerland's largest car importer with exclusive rights for major brands like Volkswagen and Audi. He was also a brilliant investor, having made a massive and incredibly lucrative early investment in the American software company CA Technologies (formerly Computer Associates).

Upon her father's death, Eva and her brother, Martin Haefner, inherited his vast fortune. They later sold their family's massive stake in CA Technologies. The siblings also divided the remaining family assets; her brother kept the AMAG car import business, while Eva took her multi-billion dollar share of the fortune in cash and other investments. She has since focused on her great passion: breeding thoroughbred racehorses. She owns and runs the world-renowned Moyglare Stud Farm in Ireland, which is one of the most successful horse breeding operations in Europe.