Jamie Dinan Net Worth

Jamie Dinan has an estimated net worth of $2.4 billion, according to Forbes Real-Time Billionaires, Jamie Dinan profile (figures as of October 20, 2026). That is up from $2.2 billion in 2019.

Jamie Dinan is an American investor known for founding York Capital Management in 1991. He studied economics at the Wharton School and later earned an M.B.A. from Harvard Business School. Early in his career, he worked at Donaldson, Lufkin & Jenrette and then at Kellner DiLeo & Company. After losing much of his savings in the 1987 Black Monday crash, he launched York and built it into a major money management firm.

His wealth comes mainly from hedge funds and investing. York Capital grew over time and later made a major deal when Dinan sold 33% of the firm to Credit Suisse for $425 million in 2010. In 2014, he also bought a minority stake in the NBA's Milwaukee Bucks with Marc Lasry and Wes Edens. Dinan later stepped away from York leadership in late 2023 and now manages his family office, according to a York filing.

How Jamie Dinan built his fortune

Dinan made his name in finance. After roles at Donaldson, Lufkin & Jenrette and Kellner DiLeo & Company, he launched York Capital Management in 1991 with $3.6 million raised from former colleagues. York was a hedge fund firm, and that became the base of his wealth. Forbes places him in Finance & Investments and describes him as self-made. He was the firm's founder and later its chairman and CEO before stepping down from the chairman role in late 2023.

Several career moves added to that base. In 2010, he sold 33% of York to Credit Suisse for $425 million. In 2014, he bought a minority stake in the Milwaukee Bucks alongside Marc Lasry and Wes Edens. York also remained central to his business story for decades. As of March 2025, the firm had $1.6 billion of assets under management, down from $19 billion in 2019. Dinan now spends his time managing his family office.

Forbes net worth over time

Forbes estimated Dinan's fortune at $2.2 billion in 2019 and again in 2020. It then listed him at $1.9 billion in 2021, 2022, and 2023. By 2024, the estimate rose to $2.1 billion, and Forbes kept that figure in 2025. Across those years, York Capital also became a much smaller firm by assets under management, falling from $19 billion in 2019 to $1.6 billion as of March 2025.

The latest Forbes figure is $2.4 billion on its real-time billionaires tracker as of October 20, 2026. Forbes also put him at $2.4 billion on the 2026 World's Billionaires List. That places him above the prior Forbes estimate from 2025. By this stage, Dinan was no longer serving as chairman of York and was focused on his family office, while his long career in hedge funds remained the main source of his wealth.