Leonid Radvinsky

Leonid Saveliyovych Radvinsky was born on May 30, 1982, in Odesa, then part of the Ukrainian SSR in the Soviet Union, to a Jewish family. When he was about six, his parents, Savely and Anna Radvinsky, emigrated with him to the United States and settled in Glenview, Illinois, a suburb of Chicago.

On his personal website, Radvinsky described himself as a first-generation immigrant from Ukraine and wrote that technology was imprinted on him at an early age while gaming with BASIC on his grandfather's i386 PC. He was writing and running websites while still a teenager.

Radvinsky attended Glenbrook South High School in Glenview, Illinois. He went on to Northwestern University in Evanston, Illinois, and graduated in 2002 with a bachelor's degree in economics. His personal website states that high marks led him to become class valedictorian.

In 1999, at the age of 17, Radvinsky helped incorporate Cybertania Inc., a website referral business. Over the following years he developed more than ten adult referral sites, including Password Universe, Working Passes and Ultra Passwords, which advertised supposedly illegal or hacked passwords to pornographic websites and earned money for each click. Business Insider reported that Ultra Passwords earned about $1.8 million a year in revenue during the 2000s. Forbes, in a 2021 investigation, said there was no evidence the sites actually linked to illegal content.

In 2004 he founded MyFreeCams, an adult webcam streaming site, through his holding company MFCXY, Inc. In 2009 he founded the venture capital fund Leo, which invested mainly in technology companies, including the Israel based B4X and the social networking software Pleroma.

In 2018 Radvinsky bought a 75 percent stake in Fenix International Ltd, the parent company of OnlyFans, from founders Tim Stokely and Guy Stokely. OnlyFans lets creators sell subscriptions and pay per view content, keeping 80 percent of earnings while the company takes 20 percent. Under his ownership it grew into a platform with more than 300 million users and about 4.5 million creators, with a staff of under 50 people. Its revenue passed $1 billion a year and it paid Radvinsky $472 million in dividends for 2023 and $701 million for 2024. From 2024 his shares were held in the LR Fenix Trust. In 2025 he was reported to be seeking up to $8 billion in talks to sell the company.

Radvinsky married Yekaterina "Katie" Chudnovsky, an attorney and philanthropist, in 2008. The couple had four children. Around the time of the marriage he bought a home in Boca Raton, Florida, while keeping real estate in Illinois, including farmland. Later reports said he lived in a $19 million oceanfront condominium at the Turnberry Ocean Club in the Miami area.

He was famously reclusive. Top OnlyFans creators reportedly never met or spoke with him, and media outlets repeatedly noted that only one publicly known photograph of him existed. His website described him as an avid reader who was always ready for a chess match and an aspiring helicopter pilot.

Radvinsky rarely spoke publicly about his views. His personal website focused on technology and open source software rather than OnlyFans, and he was a supporter of the Elixir programming language. The site also said he aspired to sign The Giving Pledge, the commitment by wealthy people to give away most of their fortune.

In 2023, The Lever reported that internal documents from the pro-Israel lobbying group AIPAC listed Radvinsky and his wife as having contributed $11 million. Radvinsky denied the contribution when asked by the outlet.

Radvinsky donated $5 million to Ukraine relief in 2022 and gave to a cancer charity, an animal welfare organization and a skin disorder research fund. He also supported Memorial Sloan Kettering Cancer Center and the West Suburban Humane Society. In 2024 he and his wife were public supporters of a $23 million grant program for cancer research announced at a gastrointestinal research foundation gala. Speaking at that event, his wife said: "Leo's here tonight, proving that science and miracles go hand-in-hand."

Radvinsky is credited with transforming online adult entertainment from a largely free, ad supported model into a subscription business built on direct relationships between creators and fans. OnlyFans became a cultural phenomenon during the pandemic and was used by sex workers, celebrities, musicians and athletes alike. Supporters, including creator Sophie Rain, said the platform changed their lives financially. Critics questioned his early business history and the platform's role in the porn industry. After his death, ownership of his stake passed to his widow, Katie Chudnovsky, making OnlyFans majority owned by a woman.

Radvinsky was the subject of a 2021 Forbes investigation, "The Shady, Secret History Of OnlyFans' Billionaire Owner", a 2022 Telegraph profile, "The elusive porn baron behind OnlyFans", a 2023 BBC profile asking who he was, and a 2025 Wall Street Journal profile, "The Mysterious Billionaire Behind the OnlyFans Porn Empire". After his death, The Hollywood Reporter asked whether he was the Mark Zuckerberg of the online porn industry, and Forbes published "Inside The Race To Sell OnlyFans". His death was also joked about on the British sketch show Saturday Night Live UK.

Radvinsky's early adult referral sites advertised supposedly hacked passwords, and Business Insider reported that one advertised "illegal pre-teen passwords"; Forbes said there was no evidence the sites linked to illegal content. In 2004 Microsoft sued him and his companies Activsoft and Cybertania over allegedly deceptive emails sent to Hotmail users, but the case was dismissed. OnlyFans under his ownership faced ongoing scrutiny over adult content and pressure from banks and card companies.

Radvinsky had been privately living with cancer. Forbes reported that investors learned he had been diagnosed with terminal cancer and that his declining health drove an accelerated effort to sell OnlyFans, including a proposal by Architect Capital valuing the company at $5.5 billion.

He died on March 20, 2026, at the age of 43. OnlyFans announced the death on March 23 in a statement: "We are deeply saddened to announce the death of Leo Radvinsky. Leo passed away peacefully after a long battle with cancer. His family have requested privacy at this difficult time." The company did not specify where he died; he lived in Florida. Funeral and burial details were not made public.

He was survived by his wife and four children. His stake in Fenix International passed to his widow, who became the company's controlling owner.