So how does Stella spend her fortune? It seems she's invested a hefty chunk of into property.
In 2001, she snapped up a Grade II-listed, nine-bedroom Georgian manor house for $2 million (£1.3m) in Worcestershire in central England. The historic estate came with 277 acres of farmland, which Stella planned to transform into an organic farm.
In 2016, she purchased a charming oceanfront home in the Hamptons, New York (pictured). Her three-bedroom beach abode set her back a cool $1.3 million (£880k). However, in 2019, it was reported that the fashion designer's neighbours were furious after Stella blocked access to the beach by building a five-foot-high (1.5m) sea wall around the property to prevent erosion.
In addition to these lavish homes, Stella previously owned a three-bedroom house in west London, though she listed it for $3 million (£2.5m) in 2022. Stella lives with her husband, Alasdhair Willis, who is the chief creative officer at Adidas, and the couple have four children together.