Glenn Dubin Glenn Russell Dubin (born April 13, 1957) is an American billionaire hedge fund manager, investor, and philanthropist. He is the Principal of Dubin & Co. LP, a private investment firm, and co-founder of Highbridge Capital Management, which grew to manage over $35 billion in assets before being acquired by J.P. Morgan in 2009. He later co-acquired Castleton Commodities International (CCI) in 2012 and founded Engineers Gate LP, a quantitative trading firm, in 2013.

Dubin is a founding board member of the Robin Hood Foundation, one of New York City's largest poverty-fighting organizations, and with his wife Eva Andersson-Dubin, has signed The Giving Pledge, committing to donate at least half of their wealth to charity. Their philanthropy includes major donations to Stony Brook University, Mount Sinai Health System (funding the Dubin Breast Center), and the New York Climate Exchange.

He is married to Eva Andersson-Dubin, a physician and former Miss Sweden, with whom Epstein had a long-term relationship prior to her marriage. Epstein was the godfather to the Dubins' children and maintained ties with the family after his 2008 conviction. Dubin has been named in unsealed Epstein-related documents, including allegations by Virginia Giuffre and financial links in JPMorgan's suspicious activity report. He denies all allegations.