OnlyFans owner Leonid Radvinsky has died at age 43 after a secret battle with cancer, the porn streaming platform has announced.

“We are deeply saddened to announce the death of Leo Radvinsky. Leo passed away peacefully after a long battle with cancer,” the company said in a statement.

“His family have requested privacy at this difficult time.”

OnlyFans owner Leonid Radvinsky has died at age 43 after a secret battle with cancer. Leonid Radvinsky/Facebook

The Ukrainian-American entrepreneur acquired Fenix International, the company that owns and operates OnlyFans, in 2018, and remained a director and the majority shareholder at the company.

His cancer battle was largely unknown to the public, and Radvinsky kept a famously low profile despite his status as a billionaire.

He was a prominent donor to medical causes, and in 2024, he and his wife were major supporters of a $23 million grant program for cancer research through a gastrointestinal research foundation, according to a Wall Street Journal report.

His wife, Katie Chudnovsky, who had sat on the board of the foundation for over a decade, spoke at the gala, appearing to allude to her husband’s health battles.

“Because of the scientists behind the research we are funding, one miracle followed another,” Chudnovsky said at the gala, as reported by the Wall Street Journal at the time.

“The advances will forever change the face of cancer treatment. And Leo’s here tonight proving that science and miracles go hand in hand,” she said.

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Born in Odesa to Jewish Ukrainian parents and raised outside Chicago, Radvinsky graduated from Northwestern University with a degree in economics before founding a venture capital fund named “Leo” that invested in tech companies.

As of March 10, Forbes estimated the Ukrainian-born businessman’s net worth at a whopping $4.7 billion, making him one of the richest people in the world.

Over the course of five years, Radvinsky collected nearly $1.3 billion in dividends from OnlyFans, which has transformed the porn industry.

Radvinsky acquired the lucrative business from British father-and-son duo Guy and Tim Stokely, who founded the platform in 2016, according to the Financial Times.

Radvinsky lived in Sunny Isles Beach, a ritzy coastal city in Miami-Dade County, Florida. Paul Martinka

He purchased its parent company, Fenix International, for an undisclosed amount in 2018, the outlet reported.

Radvinsky, who lived in Sunny Isles Beach, a ritzy coastal city in Miami-Dade County, Florida, for the last several years, became the director and majority shareholder of the company.

His shares in the company have reportedly been held in a trust since then. 

He was reportedly trying to sell his stake in the company for $8 billion — though he had trouble finding a bank to broker the deal.

London-based Fenix International was in talks last year over a potential acquisition by a group led by Forest Road, an LA-based investment bank and advisory firm, although the talks collapsed for unknown reasons.