Michael Rubin is an American businessman, entrepreneur, and philanthropist who has a net worth of $10.2 billion as of November 2022). He is the founder and CEO of Fanatics, an online company that sells sportswear and sports equipment. Rubin also serves as the executive chairman of the Rue Gilt Groupe, which includes the online retailers Gilt.com, RueLaLa.com, and ShopPremiumOutlets.com).

Rubin made his fortune by selling his company GSI Commerce to eBay for $2.4 billion in 2011. He became a partner of the basketball team the Philadelphia 76ers in 2011 and the hockey team the New Jersey Devils in 2013. Rubin owns about 33% of Fanatics, which was valued at $31 billion in a December 2022 funding round.

Rubin has been included in the Forbes 400: The Richest People in America, the Forbes: The Worlds Billionaires list, and the Bloomberg Billionaires Index). He is an avid sports fan and splits his time between the Philadelphia area and New York City).