In 1985, he took a job at the merger arbitrage firm Kellner DiLeo & Company.[2] In 1987, the market crashed and he lost his entire $600,000 in savings.[2] In 1991, he was able to raise $3.6 million from his former DLJ colleagues and started his own hedge fund named York Capital (named after the street he was then living on, York Avenue).[2] In 1993, his fund earned credibility with a 33.8 percent return and by 2000, the fund had over $610 million in assets.[2] In 2010, he sold 33% of York to Credit Suisse for $425 million.[6] In 2011, he made a $1 million donation to the Museum of the City of New York.[7] In July 2014, Dinan gained partial ownership of the NBA's Milwaukee Bucks.[8] In June 2017, he named two eventual successors to lead York Capital in the future.[9] In 2018, York Capital Management had $20.5 billion assets under management.
Philanthropy
In 2024 after a large donation by Dinan to the University of Pennsylvania, his alma mater, Henry T. Vance Hall or simply Vance Hall, a major building within the Wharton Business School campus footprint was renamed Dinan Hall. [10][11]
