Millennium Management LLC is an investment management firm with a multistrategy hedge fund offering.[9] It is one of the world's largest alternative asset management firms with $84.2 billion assets under management as of March 2026. [8] [10][11] The firm operates in America, Europe and Asia.[12] As of 2022, Millennium had posted the fourth highest net gains of any hedge fund since its inception in 1989.[13]