Fortress Investment Group | 74,784 followers on LinkedIn. Fortress Investment Group LLC is a leading, highly diversified global investment manager. Founded in 1998, Fortress manages $50 billion of assets under management as of 31 December 2024, on behalf of approximately 2,000 institutional clients and private investors worldwide across a range of credit and real estate, private equity and permanent capital investment strategies. AUM refers to assets Fortress manages, including capital that Fortress has the right to call from investors, or investors are otherwise required to contribute, pursuant to their capital commitments to various funds or managed accounts.