G lenn Dubin is an American billionaire hedge fund manager and a prominent figure in the alternative investment industry. He is the co-founder of Highbridge Capital Management, a major multi-strategy hedge fund. He started the firm in 1992 with his childhood friend, Henry Swieca. They built the firm into a massive success, known for its diverse investment strategies.

In 2004, they sold a majority stake in Highbridge to the investment banking giant J.P. Morgan Chase, a deal that cemented Dubin's billionaire status. He remained at the helm of the company for many years before stepping down. He has since founded his own family office, Dubin & Co., to manage his personal fortune and has also launched a new quantitative investment firm. He is a major philanthropist, particularly in the field of medical research, having founded the Dubin Breast Center at Mount Sinai Hospital in New York.