Leonid Radvinsky, the Ukrainian-American billionaire businessman and computer programmer best known as the owner of the content subscription service OnlyFans, passed away on March 20, 2026, at the age of 43, after a battle with cancer. His passing was announced by OnlyFans, which expressed deep sadness at the news. Radvinsky maintained a notably private life despite his significant influence in the digital world, residing primarily in Florida.

Born in Odesa, Ukrainian SSR, on May 30, 1982, Radvinsky’s family emigrated to Chicago, Illinois, when he was a child. He pursued higher education at Northwestern University, graduating in 2002 with a degree in economics. His early career in the late 1990s and early 2000s involved developing various websites, including some that generated revenue through referrals to adult content.

Radvinsky’s entrepreneurial spirit led him to found MyFreeCams in 2004, an adult streaming website that became a significant player in the webcam industry. In 2009, he established a venture capital fund named “Leo,” through which he invested in numerous technology companies. His strategic vision and investment acumen were evident in his diverse portfolio.

A pivotal moment in his career came in 2018 when he acquired a 75% stake in Fenix International Ltd., the parent company of OnlyFans. Under his ownership, OnlyFans experienced exponential growth, particularly during the pandemic, becoming a global platform for content creators, especially those in the adult entertainment industry. The platform’s success led to substantial dividends for Radvinsky, including a reported $701 million in 2025.

Beyond his business ventures, Radvinsky was also a philanthropist and a supporter of open-source technology. He made significant charitable contributions, including a $5 million donation for Ukraine relief in 2022. In 2024, he and his wife were major public supporters of a $23 million grant program dedicated to cancer research, reflecting his commitment to medical advancements. He also supported various other causes, such as animal welfare and skin disorder research.

Leonid Radvinsky’s legacy is marked by his profound impact on the digital content landscape and his strategic investments in technology. His ability to identify and scale successful online platforms, coupled with his philanthropic endeavors, cemented his status as a notable figure in the business world. He is survived by his wife, Katie Chudnovsky, and four children, who have requested privacy during this difficult time.