March 23 (UPI) -- Leonid Radvinsky, owner of OnlyFans, has died of cancer at 43.

Radvinsky was born in Ukraine and grew up in Chicago. He bought OnlyFans, a site known for its adult content, in 2018 from British founders.

"We are deeply saddened ​to announce the death of Leo ​Radvinsky. Leo passed away peacefully after a ⁠long battle with cancer," a company spokesperson said. "His family have requested privacy at ​this difficult time."

Popularity of the site rose during the COVID-19 pandemic, putting Radvinsky on the Forbes list of billionaires three years later, the BBC reported.

As of May 2025, Radvinsky was reportedly worth $3.8 billion.