Brown Brothers Harriman is the oldest and one of the largest private investment banks in the United States.

Brown Brothers Harriman provides advisory, wealth management, commercial banking, and investor services for corporate institutions and high-net-worth individual clients. Alongside the aforementioned services, the firm provides global custody, foreign exchange, private equity, merger and acquisitions, investment management for individuals and institutions, personal trust and estate administration, and securities brokerage services. Organized as a partnership, BBH has approximately 6,000 staff in 18 offices throughout North America, Europe, and Asia. Currently, the firm has 38 partners, and acts as custodian and administrator for $3.3 trillion and $1.2 trillion in assets, respectively.