Leonid Radvinsky (30 May 1982 – 20 March 2026) was a United Kingdom-based Ukrainian-American billionaire businessman and computer programmer. He is the founder of the cam site MyFreeCams (through his holding company, MFCXY, Inc.), and the majority owner of content subscription service OnlyFans. As of October 2025, he had an estimated net worth of $7.8 billion, per Forbes' Real-Time Billionaire rankings. == Biography == Radvinsky was born in Odesa and his family later emigrated to Chicago when he was a child. In 2002, he graduated from Northwestern University with a degree in economics. He was Jewish. Radvinsky operated a venture capital fund called "Leo", founded in 2009, which invests mainly in tech companies. Notable investments include Israel-based B4X and the social networking software Pleroma. Radvinsky was also a supporter of the Elixir programming language. He donated $5 million to Ukraine relief in 2022 as well a cancer charity, an animal-welfare organization, and a skin-disorder-research fund. Radvinsky also donated to the Memorial Sloan Kettering Cancer Center and the West Suburban Humane Society. == Career == === Early career === In 1999, when Radvinsky was 17 years old, he helped incorporate Cybertania Inc., a website referral business. During the late 1990s and early 2000s, Radvinsky developed more than ten websites such as Password Universe, Working Passes and Ultra Passwords that claimed and were advertised to provide users with "illegal" and "hacked" passwords to porn sites, where he earned money for every click. However, according to Forbes there wasn't any evidence suggesting the sites actually linked to illegal content. Ultra Passwords reportedly earned $1.8 million a year in revenue during the 2000s. In 2004, he founded MyFreeCams, an adult streaming website. The same year, Microsoft sued Radvinsky for allegedly sending millions of deceptive emails to Hotmail users, but the case was eventually dismissed. === OnlyFans === In 2018, he bought a 75% stake in OnlyFans' parent company Fenix International Ltd. from its British founders Tim Stokely and his dad Guy Stokely. After this, OnlyFans became increasingly focused on not safe for work (NSFW) content and "gained a pop culture reputation for being a hive of pornography". OnlyFans had annual revenues in excess of $6.6 billion as of November 2023, with revenues growing 19% per year. Radvinsky received $472 million in dividends from the website in 2023, up from $338 million and $284 million in 2022 and 2021, respectively. === Philanthropy === In 2024 Radvinsky and his wife were both major public supporters of a $23 million grant program for cancer research, which was announced at a gastrointestinal research foundation gala. Radvinsky has also indicated on his personal website his aspiration to sign the Giving Pledge, a public commitment by wealthy individuals to donate the majority of their fortune to philanthropic causes. == Political activity == In 2023, according to The Lever's reporting on private financial documents, Radvinsky and his spouse contributed $11 million to AIPAC, a pro-Israel lobbying group. When asked for comment, Radvinsky disputed the contribution. == Death == Radvinsky died of cancer on 20 March 2026. OnlyFans released a statement announcing his death saying they were "deeply saddened" by the news. == Notes == == References == == External links == Official website (#1) Official website (#2) Leo.com (venture capital fund)