The Teacher Retirement System of Texas is responsible for investing funds under its stewardship and for delivering benefits to members as authorized by the Texas Legislature. TRS is a defined benefit plan, with retirement benefits determined by a pre-established formula. The trust fund is sustained principally by three sources -- contributions by members during their working careers, contributions by the state, and investment revenues. TRS is the largest public retirement system in Texas in both membership and assets. It is the sixth largest public pension plan in the U.S. and is among the 20th largest in the world. The agency serves more than 1.5 million people – 1,110,026 are public and higher education members, and 393,914 are retirement recipients. System net assets total approximately $140 billion.