SEI Investments Company, formerly Simulated Environments Inc, is a financial services company headquartered in Oaks, Pennsylvania, United States. The company describes itself as "a global provider of investment processing, investment management, and investment operations solutions". SEI provides products and services to institutions, private banks, investment advisors, investment managers, and private clients. Through its subsidiaries and partnerships in which the company has significant interests, SEI manages, advises or administers $1 trillion in hedge funds, private equity, mutual funds and pooled or separately managed assets. This includes $352 billion in assets under management and $683.3 billion in client assets under administration.