Wellington Management serves as an investment adviser to more than 2,400 institutions located in over 60 countries, and as of 30 September 2021, they manage more than US$1 trillion in client assets. They exist solely to meet the needs of their clients, which include central banks and sovereign institutions, consultants, defined benefit and defined contribution plans, endowments and foundations, family offices, insurers, and intermediaries and wealth managers. 

They trace their history back to 1928, when Walter Morgan, a Philadelphia-based accountant, established the first balanced mutual fund in the United States. Their expertise is investments — from global equities and fixed income to currencies and commodities. They like to describe themselves as a community of teams that create solutions designed to respond to specific client needs. Their most distinctive strength is their proprietary, independent research, which is shared across all areas of the organization and used only for managing their clients'​ portfolios.